CN115217573B - An oil delivery system and an oil temperature control method - Google Patents

Abstract

The invention discloses an oil delivery system and a method for controlling the temperature of the engine oil. The oil delivery system includes: a main oil circuit for delivering engine oil to a power device; an oil storage device connected to the power device to store the power device. The oil in the medium return flow; the oil pump, the oil pump is used to transport the oil in the oil storage device to the main oil circuit; the oil pump, the oil storage device and the main oil circuit constitute the circulating oil circuit of the power unit; the oil quantity regulating device, the oil quantity The regulating device is located between the oil pump and the main oil circuit. When the power unit is running, the oil volume regulating device can adjust the total amount of oil in the circulating oil circuit according to the ambient temperature and/or the temperature of the oil in the circulating oil circuit, thereby regulating the circulation. The heating rate of the oil in the oil circuit. The oil delivery system and the oil temperature control method of the present invention can efficiently control the oil in the power plant to the required temperature.

Description

An oil delivery system and an oil temperature control method

Technical field

The present invention relates to the field of vehicle technology, and in particular, to an oil delivery system and an oil temperature control method.

Background technique

Engine oil, that is, engine lubricating oil, can lubricate and reduce friction, assist in cooling, seal and prevent leakage, prevent rust and corrosion, and provide shock absorption and buffering for the engine.

Engine oil has an optimal operating temperature range. When the engine oil temperature is too low, oil emulsification and oil increase are prone to occur, and the oil viscosity is high, causing high engine friction and low efficiency, thereby increasing fuel consumption. And when the engine is cold started, the oil temperature is too low, resulting in high viscosity, and the oil cannot flow quickly to the various parts, resulting in poor engine fuel economy. When the engine oil temperature is too high, the oil viscosity is too low, which can easily cause engine lubrication failure and cause component damage.

There is only one oil pan in the current engine lubrication system. When the engine stops running, most of the oil in the circulating oil circuit returns and is stored in the oil pan. When the engine starts running, the oil pump pumps oil from the bottom of the oil pan through the oil suction pan. The oil is sucked in and provided to the entire engine pressure lubrication system, making it impossible to control the oil in the power unit to the required temperature.

The preceding description is intended to provide general background information and does not necessarily constitute prior art.

Contents of the invention

The object of the present invention is to provide an oil delivery system that can efficiently control the oil in a power plant to a required temperature.

The invention provides an engine oil delivery system, which is applied to a power device and includes:

Main oil circuit, the main oil circuit is used to transport engine oil to the power device;

An oil storage device, the oil storage device is connected to the power device to store the engine oil returned from the power device;

An oil pump is used to transport the oil in the oil storage device to the main oil circuit. The oil pump, the oil storage device and the main oil circuit constitute the power plant. circulating oil circuit;

An oil quantity adjustment device is located between the oil pump and the main oil circuit; the oil quantity adjustment device can adjust the oil quantity according to the ambient temperature and/or the circulating oil when the power unit is running. The temperature of the engine oil in the circuit is used to adjust the total amount of the engine oil in the circulating oil circuit, thereby adjusting the heating rate of the engine oil in the circulating oil circuit.

Further, the oil quantity adjusting device can also adjust the total quantity of the motor oil in the circulating oil circuit according to the total quantity of the motor oil in the oil storage device, and thereby adjust the total quantity of the motor oil in the oil storage device. The total amount of engine oil is not less than the first threshold.

Further, the oil quantity adjustment device includes:

A fuel tank, the fuel tank is used to contain the engine oil;

A bypass oil circuit connects the oil pump and the main oil circuit;

A connecting oil line connects the bypass oil line and the oil tank.

Furthermore, it also includes:

a liquid level sensor, the liquid level sensor is used to monitor the total amount of the engine oil in the oil storage device;

a first temperature monitoring mechanism, the first temperature monitoring mechanism is used to monitor the ambient temperature;

a second temperature monitoring mechanism, the second temperature monitoring mechanism is used to monitor the temperature of the engine oil;

A control device, the control device is connected to the liquid level sensor, the first temperature monitoring mechanism, and the second temperature monitoring mechanism. The control device can determine the level of the engine oil in the oil storage device. The total amount, and the ambient temperature and/or the engine oil temperature are used to control the flow direction of the engine oil in the connecting oil passage, and thereby control the total amount of the engine oil in the circulating oil passage.

Further, a first solenoid valve and a second solenoid valve are provided on the connecting oil line. When the first solenoid valve is opened, the oil in the circulating oil line flows to the oil tank, and the second solenoid valve is opened. When the engine oil in the oil tank flows to the circulating oil circuit;

The control device is connected to both the first solenoid valve and the second solenoid valve, and the control device can control the connection by controlling the opening and closing of the first solenoid valve and the second solenoid valve. The flow direction of the oil in the oil circuit.

Further, the oil tank is located above the oil storage device, and the connecting oil circuit includes:

Oil inlet pipeline, the oil inlet pipeline connects the bypass oil channel and the oil tank, the first solenoid valve is arranged in the oil inlet pipeline, and when the first solenoid valve is opened, it is in the bypass oil channel The engine oil flows to the fuel tank;

An oil outlet pipeline connects the oil storage device and the oil tank. The second solenoid valve is arranged in the oil outlet pipeline. When the second solenoid valve is opened, the The oil flows by gravity to the oil reservoir.

The present invention also provides a method for controlling the temperature of engine oil, which is applied to the oil delivery system as described above, including:

When the power unit is running, the total amount of oil in the circulating oil circuit is adjusted by adjusting the oil amount in the oil amount adjusting device according to the ambient temperature and/or the engine oil temperature, and then Adjust the heating rate of the engine oil in the circulating oil circuit.

Further, when the temperature of the engine oil is higher than the first temperature, all the engine oil in the oil quantity adjustment device is controlled to flow into the oil storage device to increase the total amount of the engine oil in the circulating oil circuit. , thereby reducing the heating rate of the engine oil in the circulating oil circuit;

When the temperature of the engine oil is lower than the first temperature, the engine oil in the circulating oil circuit is controlled to flow into the oil quantity regulating device to reduce the total amount of engine oil in the circulating oil circuit and thereby increase the oil quantity. The heating rate of the engine oil in the circulating oil circuit.

Further, when the temperature of the engine oil is lower than the first temperature, a portion of the engine oil in the circulating oil circuit is controlled to flow into the oil quantity adjusting device to reduce the total amount of the engine oil in the circulating oil circuit. Steps including: when the ambient temperature is lower than the third temperature and the engine oil temperature is lower than the first temperature, controlling the oil portion in the circulating oil circuit to flow into the oil quantity adjustment device so that the The total amount of engine oil in the oil storage device is maintained at a second threshold, wherein the second threshold is greater than the first threshold.

Further, when the temperature of the engine oil is lower than the first temperature, a portion of the engine oil in the circulating oil circuit is controlled to flow into the oil quantity adjusting device to reduce the total amount of the engine oil in the circulating oil circuit. The step also includes: when the ambient temperature is higher than the third temperature and the engine oil temperature is lower than the second temperature, controlling the part of the engine oil in the circulating oil circuit to flow into the oil quantity adjustment device, so that the The total amount of engine oil in the oil storage device is maintained at the second threshold, wherein the second temperature is lower than the first temperature.

Further, when the temperature of the engine oil is lower than the first temperature, a part of the circulating oil passage controls the flow of the engine oil into the oil quantity adjusting device to reduce the total amount of the engine oil in the circulating oil passage. The step also includes: when the ambient temperature is higher than the third temperature and the engine oil temperature is between the second temperature and the first temperature, controlling the part of the engine oil in the circulating oil circuit to flow into the The oil quantity adjustment device is used to make the total quantity of engine oil in the oil storage device exceed the second threshold.

Further, when the ambient temperature is higher than the third temperature, the engine oil temperature is between the second temperature and the first temperature, the rotation speed of the power unit is less than N, and the load of the power unit is less than B When, the oil in the circulating oil circuit is controlled to flow into the oil quantity regulating device so that the total quantity of oil in the oil storage device is maintained at a third threshold, wherein the third threshold is greater than the The second threshold;

Further, when the ambient temperature is higher than the third temperature, the engine oil temperature is between the second temperature and the first temperature, and when the rotation speed of the power unit is greater than N and/or the speed of the power unit When the load is greater than B, the oil in the circulating oil circuit is controlled to flow into the oil quantity adjustment device so that the total amount of oil in the oil storage device is maintained at a fourth threshold, wherein the fourth The threshold is greater than the third threshold.

Further, the control method further includes: before the power unit is started and after the engine is turned off, adjusting the amount of engine oil in the oil amount adjusting device according to the total amount of engine oil in the oil storage device to Adjust the total amount of engine oil in the circulating oil circuit, and then adjust the total amount of engine oil in the oil storage device to be no less than a first threshold; when the total amount of engine oil in the oil storage device When it is lower than the first threshold, the oil in the oil quantity adjustment device is controlled to flow into the oil storage device so that the total amount of oil in the oil storage device reaches the first threshold.

The oil delivery system and oil temperature control method provided by the present invention can adjust the total amount of oil in the circulating oil circuit through the oil volume adjusting device according to the ambient temperature and/or the oil temperature when the power unit is running, thereby adjusting the temperature rise of the oil. speed, improving power unit efficiency and fuel economy.

Description of the drawings

Figure 1 is a schematic diagram of the exploded structure of the oil delivery system according to the embodiment of the present invention;

Figure 2 is a cross-sectional view of the main oil circuit, oil volume regulating device, oil storage device and oil pump in the oil delivery system shown in Figure 1.

Detailed ways

Specific implementations of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate the invention but are not intended to limit the scope of the invention.

Please refer to FIGS. 1 to 2 . An embodiment of the present invention provides an oil delivery system for use in power devices. The power plant can be an internal combustion engine that propels the vehicle, an electric motor, or a hybrid system of an engine and an electric motor. In this embodiment, the power device is the engine 10 .

The oil delivery system includes a main oil circuit 20 , an oil quantity regulating device 30 , an oil storage device 50 , and an oil pump 60 . The oil storage device 50 is connected to the engine 10 to store the oil returned in the engine 10 . The oil pump 60 pumps the oil in the oil storage device 50 to the main oil passage 20 . The oil flows to the engine 10 through the main oil passage 20 . The oil storage device 50 , the oil pump 60 and the main oil passage 20 constitute the circulating oil passage of the engine 10 . The oil quantity regulating device 30 is located between the oil pump 60 and the main oil circuit 20. The oil quantity regulating device can adjust the total amount of oil in the circulating oil circuit according to the ambient temperature and/or the temperature of the oil in the circulating oil circuit when the power unit is running. quantity, thereby adjusting the heating rate of the oil in the circulating oil circuit.

The oil delivery system provided in this embodiment can adjust the total amount of oil in the circulating oil circuit through the oil volume adjusting device 30 according to the ambient temperature and the oil temperature, thereby adjusting the heating rate of the oil and improving the efficiency and fuel economy of the engine 10 . Specifically, when the engine 10 is cold-started, the oil is stored through the oil quantity regulating device 30 to maintain the total amount of oil in the circulating oil circuit at a lower value, thereby increasing the heating rate of the oil and evaporating the water and gasoline in the oil as quickly as possible. out, extending the service life of the engine oil, and at the same time reducing the viscosity of the engine oil, so that the engine oil can enter the optimal working temperature as soon as possible; when the engine oil temperature is too high, the engine oil is released through the oil quantity adjustment device 30 to increase the total amount of engine oil in the circulating oil circuit. Thereby reducing the heating rate of the engine oil and preventing the components in the engine 10 from being damaged and failing due to overheating. At the same time, by disposing the oil quantity adjustment device 30 between the oil pump 60 and the main oil line 20, the oil quantity adjustment device 30 and the main oil line 20 are connected in series, and there is no need to add an additional pump to inject oil into the oil quantity adjustment device 30, which reduces cost.

The oil quantity adjusting device can also adjust the total quantity of engine oil in the circulating oil circuit according to the total quantity of engine oil in the oil storage device before the power unit is started and after the engine is turned off, and thereby adjust the total quantity of engine oil in the oil storage device. The amount is not less than the first threshold. By maintaining the total amount of oil in the circulating oil circuit at a lower limit when the engine 10 is not started, lubrication failure caused by the air suction of the oil pump 60 when the engine 10 is running is avoided.

The oil delivery system also includes a liquid level sensor 40, a first temperature monitoring mechanism and a second temperature monitoring mechanism. The liquid level sensor 40 is used to monitor the total amount of engine oil in the oil storage device 50 , the first temperature monitoring mechanism is used to monitor the ambient temperature, and the second temperature monitoring mechanism is used to monitor the temperature of the engine oil in the circulating oil circuit. The control device is connected to the liquid level sensor, the first temperature monitoring mechanism, and the second temperature monitoring mechanism. The control device can control the oil volume regulating device 30 by judging the total amount of oil in the oil storage device, as well as the ambient temperature and/or the engine oil temperature. Store or release engine oil, thereby controlling the total amount of engine oil in the circulating oil circuit. Through the liquid level sensor, the first temperature monitoring mechanism, and the second temperature monitoring mechanism, the total amount of engine oil, ambient temperature, and engine oil temperature in the oil storage device 50 in the oil delivery system can be accurately monitored, and the oil amount adjustment device can be accurately monitored through the control device. 30 Precise control of storing or releasing oil enables precise regulation of oil temperature in the oil delivery system.

The oil quantity regulating device 30 includes an oil tank 31, a bypass oil line 32 and a connecting oil line 33. The oil tank 31 is used to contain engine oil. The bypass oil line 32 connects the main oil line 20 and the oil pump 60. The connecting oil line 33 connects the bypass oil. Road 32 and tank 31. The engine oil flows from the oil tank 31 to the circulating oil passage, or from the circulating oil passage to the oil tank 31 through the connecting oil passage 33, thereby adjusting the total amount of engine oil in the circulating oil passage.

The connecting oil line 33 includes an oil inlet line 331, a first oil outlet line 332 and a second oil outlet line 333. The engine oil can flow from the circulating oil line into the oil tank 31 through the oil inlet line 331, and the engine oil can flow through the first oil outlet line 332 and the second oil outlet line 333. The second oil outlet pipe 333 flows from the oil tank 31 into the circulating oil circuit. The oil inlet pipeline 331 and the second oil outlet pipeline 333 are both connected to the oil tank 31 and the bypass oil pipeline 32 , and the first oil outlet pipeline 332 is connected to the oil tank 31 and the oil storage device 50 . The oil tank 31 is located above the oil storage device 50 . One end of the first oil outlet pipe 332 is connected to the bottom of the oil tank 31 , and one end of the second oil outlet pipe 333 is connected to the top of the oil tank 31 . By arranging the oil tank 31 above the oil storage device 50, the oil in the oil tank flows directly to the oil storage device 50 by gravity without adding an additional pump, further reducing costs.

The oil inlet pipeline 331 is provided with a first solenoid valve 3311. When the first solenoid valve 3311 is opened, the oil in the bypass oil line 32 can flow to the oil tank 31 under the action of the oil pump 60. The first oil outlet pipe 332 is provided with a second solenoid valve 3321. When the second solenoid valve 3321 is opened, the oil in the oil tank 31 can flow to the oil storage device 50 under the action of gravity. The second oil outlet pipe 333 is provided with a one-way valve 3331. When the oil level in the oil tank 31 reaches the position of the second oil outlet pipe 333, the oil in the oil tank 31 can flow to the bypass oil passage through the second oil outlet pipe 333. 32.

The control device is connected to both the first solenoid valve 3311 and the second solenoid valve 3321. The control device can control the first solenoid valve according to the ambient temperature, oil temperature, the total amount of oil in the circulating oil circuit, and the speed and load of the engine 10. The opening and closing of 3311 and the second solenoid valve 3321 adjusts the total amount of engine oil in the circulating oil circuit, thereby regulating the heating rate of the engine oil, and improving the efficiency and fuel economy of the power unit.

In this embodiment, the oil storage device 50 is an oil pan, located below the engine 10 . After the oil flows through the engine 10 , it flows back from the engine 10 to the oil storage device 50 by gravity. The control device is an ECU (Electronic Control Unit, electronic control unit). The first solenoid valve 3311 and the second solenoid valve 3321 are both electronically controlled solenoid valves. The control device can send different electrical signals to the first solenoid valve 3311 and the second solenoid valve 3321. signal, when the first solenoid valve 3311 and the second solenoid valve 3321 receive different electrical signals, the opening and closing states and opening degrees of the first solenoid valve 3311 and the second solenoid valve 3321 will change. The liquid level sensor 40 is arranged in the oil storage device 50 . The liquid level sensor 40 monitors the liquid level of the engine oil in the oil storage device 50 and thereby monitors the total amount of engine oil in the circulating oil circuit.

The oil delivery system provided by this embodiment can adjust the temperature in the circulating oil path by controlling the opening and closing of the first solenoid valve 3311 and the second solenoid valve 3321 according to the ambient temperature, the oil temperature, and the total amount of oil in the circulating oil path. The total amount of engine oil can then adjust the heating rate of the engine oil, improve the efficiency and fuel economy of the power unit, and the solenoid valve has fast response speed and high adjustment accuracy. At the same time, the one-way valve 3331 is used to prevent excessive storage of oil in the oil tank 31 from damaging the oil tank 31 .

This embodiment also provides a method for controlling engine oil temperature, which is applied to the oil delivery system as described above, including:

When the engine is running, according to the ambient temperature and/or the temperature of the oil in the circulating oil circuit, the oil quantity regulating device 30 stores and releases the oil, thereby adjusting the total amount of oil in the circulating oil circuit, thereby regulating the temperature rise of the oil in the circulating oil circuit. rate.

When the engine 10 is running, when the ambient temperature is lower than the third temperature T3 and the temperature of the oil in the circulating oil circuit is lower than the first temperature T1, the engine 10 is a cold start. The first solenoid valve 3311 and the second solenoid valve 3321 are controlled to maintain the total amount of engine oil in the oil storage device 50 at the second threshold. At this time, the total amount of engine oil in the circulating oil circuit is maintained at a low value, which increases the heating rate of the engine oil, evaporates the water and gasoline in the engine oil as quickly as possible, increases the service life of the engine oil, and at the same time reduces the viscosity of the engine oil, allowing the oil to enter the engine as quickly as possible. Optimum operating temperature.

When the engine 10 is running, when the ambient temperature is higher than the third temperature T3 and the temperature of the oil in the circulating oil circuit is lower than the second temperature T2, the second temperature T2 is lower than the first temperature T1. At this time, the engine 10 is still cold-started, and the first solenoid valve 3311 and the second solenoid valve 3321 are still controlled to maintain the total amount of engine oil in the oil storage device 50 at the second threshold, thereby increasing the heating rate of the engine oil and removing the oil from the engine 10 . The water and gasoline evaporate as soon as possible, extending the service life of the engine oil, while reducing the viscosity of the engine oil, so that the engine oil reaches the optimal working temperature as soon as possible.

When the ambient temperature is higher than the third temperature T3, the temperature of the oil in the circulating oil circuit is between the second temperature T2 and the first temperature T1. At this time, the engine oil temperature is within the optimal operating temperature range. The first solenoid valve 3311 and the second solenoid valve 3321 are controlled to make the total amount of engine oil in the oil storage device 50 exceed the second threshold and increase the total amount of engine oil in the circulating oil circuit. , slow down the heating rate of the engine oil and prevent the oil from heating up too quickly beyond the optimal operating temperature range.

Among them, when the ambient temperature is higher than the third temperature T3, the temperature of the oil in the circulating oil circuit is between the second temperature T2 and the first temperature T1, when at least one of the conditions of the engine 10 being greater than N and the load being greater than B is met. , that is, when the engine 10 is under a high load condition, the first solenoid valve 3311 and the second solenoid valve 3321 are controlled to maintain the total amount of oil in the oil storage device 50 at the fourth threshold. When the speed of the engine 10 is less than N and the load is less than B, that is, when the engine 10 is under a low load condition, the first solenoid valve 3311 and the second solenoid valve 3321 are controlled to maintain the total amount of oil in the oil storage device 50 at the third level. threshold. The fourth threshold is greater than the third threshold, and the third threshold is greater than the second threshold. This embodiment monitors the speed and load of the engine 10 to increase the total amount of oil in the circulating oil circuit under high-speed and high-load conditions to avoid lubrication failure caused by excessive temperature rise of the oil.

When the temperature of the oil in the circulating oil circuit is higher than the first temperature T1, the first solenoid valve 3311 is controlled to close and the second solenoid valve 3321 is opened, so that all the oil in the oil tank 31 flows into the oil storage device 50 and the circulating oil circuit is increased. The total amount of engine oil is reduced, thereby reducing the heating rate of the engine oil in the circulating oil circuit.

Before the engine 10 is started and after the engine is turned off, the oil volume regulating device 30 is used to control the total amount of oil in the oil storage device 50 to be no less than the first threshold; wherein, before the engine 10 is started and after the engine is turned off, the liquid level sensor 40 monitors the oil storage. When the total amount of engine oil in the device 50 is less than the first threshold, the second solenoid valve 3321 is opened, and the engine oil in the oil amount adjustment device 30 flows to the oil storage device 50 until the total amount of engine oil in the oil storage device 50 reaches At the first threshold, the second solenoid valve 3321 is closed. This embodiment avoids lubrication failure caused by air suction of the oil pump 60 when the engine 10 is running by maintaining the total amount of oil in the circulating oil circuit at a lower limit when the engine 10 is not started.

The method for controlling the oil temperature provided by this embodiment is to adjust the total amount of oil in the circulating oil path through the oil volume adjusting device 30 according to the ambient temperature, the oil temperature, the total amount of oil in the circulating oil path, and the rotation speed and load of the engine 10 . , thereby adjusting the heating rate of the engine oil, improving the efficiency and fuel economy of the engine 10; by maintaining the total amount of engine oil in the circulating oil circuit at the lower limit when the engine 10 is not started, the engine 10 is prevented from being caused by the air suction of the oil pump 60 when the engine 10 is running. Lubrication failure. By monitoring the ambient temperature and oil temperature, when the engine is cold started, the total amount of oil in the circulating oil circuit is maintained at a low value, the heating rate of the oil is increased, the water and gasoline in the oil are evaporated as quickly as possible, and the use of the oil is improved life, and at the same time reduce the viscosity of the engine oil, so that the engine oil can reach the optimal working temperature as soon as possible. When the temperature of the engine oil is too high, all the engine oil in the oil quantity regulating device 30 flows into the circulating oil circuit to reduce the temperature rise rate of the engine oil and prevent damage and failure of components in the engine 10 due to overheating. When the engine oil temperature is within the optimal operating temperature range, by monitoring the rotation speed and load of the engine 10 , under high rotation speed and high load conditions, the total amount of engine oil in the circulating oil circuit is increased to prevent the engine oil from heating up too quickly and exceeding the optimal operating temperature range. temperature range, resulting in engine 10 lubrication failure.

In the drawings, the size and relative sizes of layers and regions may be exaggerated for clarity. It will be understood that when an element such as a layer, region or substrate is referred to as being "formed on", "disposed on" or "located on" another element, it can be directly on the other element or also be present on the other element. Intermediate elements may be present. In contrast, when an element is referred to as being "directly formed on" or "directly disposed on" another element, there are no intervening elements present.

The technical features of the above embodiments can be combined in any way. To simplify the description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, All should be considered to be within the scope of this manual.

In this article, unless otherwise clearly stated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, or it can be an internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms can be understood on a case-by-case basis.

In this article, the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", The orientation or positional relationship indicated by "horizontal" is based on the orientation or positional relationship shown in the drawings. It is only for the purpose of clearly expressing the technical solution and convenient description, and therefore cannot be understood as a limitation of the present invention.

In this article, the sequence adjectives "first", "second", etc. used to describe elements are only used to distinguish elements with similar attributes, and do not mean that the elements so described must be in a given order, or in time, space, or time. grade or other restrictions.

In this article, unless otherwise stated, "plurality" and "several" mean two or more.

As used herein, the terms "includes," "comprises," or any other variation thereof are intended to cover a non-exclusive inclusion of elements other than those listed and may also include other elements not expressly listed.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (13)

1. An oil delivery system for a power plant, comprising:

the main oil way is used for conveying engine oil to the power device;

the oil storage device is connected with the power device and used for storing the engine oil which flows back in the power device;

the oil pump is used for conveying the engine oil in the oil storage device to the main oil way, and the oil pump, the oil storage device and the main oil way form a circulating oil way of the power device;

the oil quantity adjusting device is positioned between the oil pump and the main oil way; the oil quantity adjusting device can adjust the total quantity of the engine oil in the circulating oil way according to the ambient temperature and/or the engine oil temperature in the circulating oil way when the power device is operated, so as to adjust the temperature rising rate of the engine oil in the circulating oil way; the oil quantity adjusting device comprises an oil tank, a bypass oil way and a connecting oil way, wherein the oil tank is used for containing the engine oil, the bypass oil way is connected with the engine oil pump and the main oil way, and the connecting oil way is connected with the bypass oil way and the oil tank;

the oil tank is characterized in that a first electromagnetic valve and a second electromagnetic valve are arranged on the connecting oil path, engine oil in the circulating oil path flows to the oil tank when the first electromagnetic valve is opened, and engine oil in the oil tank flows to the circulating oil path when the second electromagnetic valve is opened.

2. The engine oil delivery system according to claim 1, wherein said oil amount adjusting means is further capable of adjusting the total amount of said engine oil in said circulation oil passage in accordance with the total amount of said engine oil in said oil reservoir means before and after the start of said power means, thereby adjusting the total amount of said engine oil in said oil reservoir means to be not less than a first threshold value.

3. The oil delivery system of claim 2, further comprising:

a liquid level sensor to monitor a total amount of the engine oil within the oil reservoir;

a first temperature monitoring mechanism to monitor the ambient temperature;

the second temperature monitoring mechanism is used for monitoring the temperature of the engine oil;

the control device is connected with the liquid level sensor, the first temperature monitoring mechanism and the second temperature monitoring mechanism, and the control device can control the flow direction of the engine oil in the connecting oil way and further control the total amount of the engine oil in the circulating oil way by judging the total amount of the engine oil in the oil storage device and the ambient temperature and/or the engine oil temperature.

4. The engine oil delivery system according to claim 3, wherein said control device is connected to both of said first solenoid valve and said second solenoid valve, and said control device is capable of controlling the flow direction of said engine oil in said connecting oil passage by controlling the opening and closing of said first solenoid valve and said second solenoid valve.

5. The engine oil delivery system as set forth in claim 4, wherein said oil tank is located above said oil reservoir, and said connecting oil passage includes:

an oil inlet pipe connecting the bypass oil passage and the oil tank, the first solenoid valve being arranged in the oil inlet pipe, the oil in the bypass oil passage flowing to the oil tank when the first solenoid valve is opened;

the first oil outlet pipeline is connected with the oil storage device and the oil tank, the second electromagnetic valve is arranged on the first oil outlet pipeline, and when the second electromagnetic valve is opened, engine oil in the oil tank flows to the oil storage device through the action of gravity.

6. A control method of engine oil temperature, applied to the engine oil delivery system according to any one of claims 1 to 5, characterized by comprising:

when the power device operates, the total quantity of the engine oil in the circulating oil way is regulated by regulating the engine oil quantity in the oil quantity regulating device according to the ambient temperature and/or the engine oil temperature, so that the temperature rising rate of the engine oil in the circulating oil way is regulated.

7. The method for controlling the temperature of engine oil according to claim 6, wherein,

when the temperature of the engine oil is higher than a first temperature, controlling the engine oil in the oil quantity regulating device to flow into the oil storage device completely so as to increase the total quantity of the engine oil in the circulating oil path and further reduce the temperature rising rate of the engine oil in the circulating oil path;

when the temperature of the engine oil is lower than a first temperature, controlling the engine oil in the circulating oil path to flow into the oil quantity adjusting device partially so as to reduce the total quantity of the engine oil in the circulating oil path and further improve the temperature rising rate of the engine oil in the circulating oil path.

8. The method of controlling the temperature of engine oil according to claim 7, characterized in that the step of controlling the flow of the engine oil portion in the circulation oil passage into the oil amount adjusting means to reduce the total amount of the engine oil in the circulation oil passage when the temperature of engine oil is lower than a first temperature, comprises: and when the ambient temperature is lower than a third temperature, controlling the engine oil in the circulating oil way to flow into the oil quantity regulating device so as to maintain the total quantity of the engine oil in the oil storage device at a second threshold value, wherein the second threshold value is larger than the first threshold value when the total quantity of the engine oil in the oil storage device is regulated to be not smaller than the first threshold value before starting and after flameout of the power device by the oil quantity regulating device.

9. The method of controlling the temperature of engine oil according to claim 8, characterized in that the step of controlling the portion of engine oil in the circulation oil passage to flow into the oil amount adjusting means to reduce the total amount of engine oil in the circulation oil passage when the temperature of engine oil is lower than a first temperature, further comprises: and when the ambient temperature is higher than a third temperature and the engine oil temperature is lower than a second temperature, controlling the engine oil in the circulating oil path to flow into the oil quantity adjusting device so as to maintain the total quantity of the engine oil in the oil storage device at the second threshold value, wherein the second temperature is lower than the first temperature.

10. The method of controlling the temperature of engine oil according to claim 9, characterized in that the step of controlling the flow of the engine oil portion in the circulation oil passage into the oil amount adjusting means to reduce the total amount of the engine oil in the circulation oil passage when the temperature of engine oil is lower than a first temperature, further comprises: when the ambient temperature is higher than a third temperature and the oil temperature is between the second temperature and the first temperature, the oil portion in the circulation oil passage is controlled to flow into the oil amount adjusting device so that the total amount of the oil in the oil reservoir exceeds the second threshold.

11. The control method of the oil temperature according to claim 10, characterized in that when the ambient temperature is higher than a third temperature, the oil temperature is between the second temperature and the first temperature, the rotation speed of the power unit is less than N, and the load of the power unit is less than B, the oil portion in the circulation oil passage is controlled to flow into the oil amount adjustment device so that the total amount of oil in the oil reservoir is maintained at a third threshold value, wherein the third threshold value is greater than the second threshold value.

12. The control method of the oil temperature according to claim 11, characterized in that when the ambient temperature is higher than a third temperature, the oil temperature is between the second temperature and the first temperature, and when the rotation speed of the power unit is greater than N and/or the load of the power unit is greater than B, the oil portion in the circulation oil passage is controlled to flow into the oil amount adjustment device so that the total amount of oil in the oil reservoir is maintained at a fourth threshold value, wherein the fourth threshold value is greater than the third threshold value.

13. The control method of the engine oil temperature as set forth in claim 6, characterized in that said control method further comprises: before and after the power device is started and flameout, the total amount of the engine oil in the oil storage device is adjusted by adjusting the engine oil amount in the oil amount adjusting device so as to adjust the total amount of the engine oil in the circulating oil way, and then the total amount of the engine oil in the oil storage device is adjusted to be not less than a first threshold value; and when the total amount of the engine oil in the oil storage device is lower than the first threshold value, controlling the engine oil in the oil quantity regulating device to flow into the oil storage device completely so that the total amount of the engine oil in the oil storage device reaches the first threshold value.