CN105156238B - A kind of quick air-intake heating mechanism of optical engine - Google Patents

Abstract

The invention discloses a fast air intake heating device for an optical engine, which includes a cylinder and a heating tank, an exhaust passage and an intake passage are opened in the cylinder cover of the cylinder, and an exhaust valve and an intake valve are arranged in the cylinder cover , one end of the air inlet pipe is connected with the air outlet of the heating tank and the other end is connected with the air inlet of the air inlet, one end of the exhaust pipe is connected with the outlet of the exhaust pipe, and an exhaust pipe is installed on the exhaust pipe Tube ball valve, one end of the exhaust pipe is connected with the exhaust pipe and the exhaust pipe ball valve and fan are installed in sequence along the exhaust direction of the exhaust pipe, one end of the bypass pipe is connected with the intake pipe and the other end is connected with the exhaust duct, There is a hole on the cylinder head of the cylinder above the intake and exhaust valves, and a valve top block is arranged in the hole, and the intake and exhaust valve springs are respectively connected between the intake and exhaust valves and the valve top block. A lifting mandrel is fixed on the jacking block, and the upper part of the lifting mandrel is connected with the stopper seat, and the stopper seat is fixed with the cylinder head. The device can be used to set the target intake air preheating temperature.

Description

An optical engine fast air intake heating device

technical field

The invention relates to the field of automobile engine combustion diagnosis, in particular to an optical engine air intake heating device.

Background technique

The optical engine is modified on the basis of the original commercial engine. Using the principle of optical visualization and the introduction of laser, it can diagnose the combustion state in the cylinder of the internal combustion engine in real time, so as to optimize the combustion, emission characteristics and power of the internal combustion engine. Output and other studies provide a theoretical basis.

At present, most of the optical engines at home and abroad are formed based on the modification of the original engine. The typical structural features are the use of transparent cylinder liners, translucent cylinder liners or partially transparent cylinder liners, and the middle part of the extended piston is hollowed out so that 45mm can be installed directly below the piston. High-degree reflector, the top surface of the piston is provided with a transparent window; or the exhaust valve of a two-in, two-row four-valve engine is refitted with a transparent window to provide a field of view at the boundary of the piston combustion chamber, and then cooperate with the laser With the introduction of the system, it is possible to carry out diagnostic research on the flow field, spray, temperature, combustion and other conditions in the cylinder. Since a transparent window is set on the top surface of the piston of the optical engine, and a part of the boundary of the combustion chamber on the piston is cut off to facilitate the introduction of laser light, the compression ratio of the optical engine is reduced. Optical diagnostic studies were performed under the configuration of the engine's operating conditions. In order to avoid and eliminate the impact caused by the reduction of the compression ratio, the usual method is to increase the compression ratio by heating the intake air.

The simplest heating method and device is to add a gas heating tank to the intake port of the engine, but the disadvantages of this device are that the heating efficiency is low, the intake air reaches the preset temperature for a long time, and the heating flow cannot be adjusted, which is not conducive to Experimental study of optical engines.

Contents of the invention

The object of the present invention is to overcome the deficiencies of the prior art, and provide an optical engine rapid intake air heating device that can realize intake air heating quickly, adjustable and efficiently.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A fast air intake heating device for an optical engine of the present invention comprises a cylinder and a heating tank connected to a heating control cabinet, an exhaust passage and an intake passage are opened in the cylinder head of the cylinder, An exhaust valve is arranged in the cylinder head at the air inlet of the air passage, an intake valve is arranged in the cylinder head at the air outlet of the air inlet, and the air inlet of the heating tank is connected with the air filter One end of the air inlet pipe is connected with the air outlet of the heating tank and the other end of the air inlet pipe is connected with the air inlet of the air inlet, one end of the exhaust pipe is connected with the outlet of the exhaust pipe and the other One end communicates with the outside atmosphere, an exhaust pipe ball valve is installed on the exhaust pipe, one end of the exhaust pipe communicates with the exhaust pipe between the exhaust pipe ball valve and the air inlet of the exhaust pipe The exhaust pipe ball valve and fan are installed in sequence in the exhaust direction of the air duct, the other end of the exhaust pipe communicates with the outside atmosphere, and one end of the bypass pipe communicates with the air intake pipe located at the air inlet of the air intake pipe And the other end communicates with the exhaust duct between the exhaust pipe ball valve and the blower fan. The diameter of the bypass pipe is smaller than the diameter of the inlet and exhaust pipes. Temperature sensors are respectively installed on the inlet and exhaust ducts. The cylinder head of the cylinder above the intake and exhaust valves has a hole, and a valve top block is arranged in the hole. An intake valve spring and an exhaust valve spring are respectively connected between the jacking blocks, and a lifting jack rod is fixed vertically on the valve jacking block, and the upper part of the lifting jack rod is threadedly connected with the block seat, so that Both sides of the block seat are fixed to the cylinder head by bolts fastened on the cylinder head.

Compared with the prior art, the present invention has the following beneficial effects:

Firstly, the target intake air preheating temperature can be set; secondly, the intake air heating pipeline passes through the combustion chamber, and the temperature is monitored in real time through the temperature sensors installed in the intake port and exhaust port; Forced ventilation is carried out in the airway to speed up the flow rate of the intake air; fourthly, the bypass pipe is used to realize the functions of heating the pipeline passage, assisting air extraction, and preventing airway blockage.

Description of drawings

Fig. 1 is a schematic diagram of the air intake heating structure before the engine starts of an optical engine rapid intake air heating device of the present invention;

Fig. 2 is a schematic diagram of the intake air heating structure of an optical engine rapid air intake heating device of the present invention when the engine is running.

detailed description

The present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

The air intake heating device of the present invention is an improvement based on the original optical engine.

A kind of fast air intake heating device for an optical engine of the present invention comprises a cylinder 6 and a heating tank 2 connected to a heating control cabinet 3, an exhaust duct and an intake duct are opened in the cylinder head 5 of the cylinder 6, An exhaust valve 10 is arranged in the cylinder head 5 at the air inlet of the exhaust port, an intake valve 8 is arranged in the cylinder head 5 at the air outlet of the air inlet, and the heating The air inlet of the tank 2 is connected with the air outlet of the air filter 1, one end of the air inlet pipe 4 is connected with the air outlet of the heating tank 2 and the other end of the air inlet pipe 4 is connected with the air inlet of the air inlet, and the exhaust One end of the trachea 16 is connected with the outlet of the exhaust duct and the other end is connected with the outside atmosphere. An exhaust pipe ball valve 17 is installed on the exhaust pipe 16. One end of the exhaust pipe 20 is connected with the exhaust pipe ball valve 17. It communicates with the exhaust pipe 1 between the air inlet of the exhaust pipe and is installed with an exhaust pipe ball valve 18 and a fan 19 in sequence along the exhaust direction of the exhaust pipe. The other end of the exhaust pipe 20 is connected to the outside world. Atmospheric communication, one end of the bypass pipe 21 communicates with the air intake pipe 4 located at the air inlet of the air intake pipe 4 and the other end communicates with the exhaust duct between the exhaust pipe ball valve 18 and the blower fan 19, the described The diameter of the bypass pipe 21 is smaller than that of the intake and exhaust pipes. Temperature sensors are respectively installed on the inlet and outlet passages. Holes are provided on the cylinder head 5 of the cylinder above the intake and exhaust valves 8 and 10, and valve top blocks 12 are arranged in the holes, and the valve top blocks 12 are matched with the holes to ensure the The valve top block 12 has only one degree of freedom, that is, the valve top block 12 can slide up and down freely. An intake valve spring 9 and an exhaust valve spring 11 are respectively connected between the intake and exhaust valves 8, 10 and the valve top block 12, and a lifting valve is fixed on the valve top block 12 in the vertical direction. Push rod 13, the upper part of the lifting push rod 13 is threadedly connected with the block seat 14, and the two sides of the block seat 14 are fixed with the cylinder head by bolts 15 fastened on the cylinder head.

The role of the bypass pipe, first, when the engine is running, because the valve top block device cannot be used, the intake and exhaust valves cannot be guaranteed to open at the same time, so the bypass pipe can ensure that the gas is connected from the intake port to the exhaust port to form a passage To achieve the function of air extraction; secondly, when the engine is not running and the valve top block device is used to extract air, the bypass pipe has a smaller diameter and its flow section is smaller than the flow interface of the intake and exhaust valves, which plays an auxiliary role in air extraction ; Third, the bypass pipe always maintains the connection between the intake pipe and the exhaust pipe, that is, the air intake passage of the entire engine is always maintained, so as to avoid the air passage when the ball valve of the exhaust pipe and the ball valve of the exhaust pipe are closed at the same time due to an operation error. block.

The operation process of this device is as follows:

First of all, before the engine is running, the intake air is heated. In order to prevent the intake and exhaust valves 8, 10 from interfering with the piston 7 when the lift rod 13 pushes the intake and exhaust valves 8, 10, the cylinder body should be cranked first. Piston 7 in 6 moves to bottom dead center, thus avoids interference. Turn the piston 7 to the bottom dead center, install the valve top block 12, fasten the block seat 14 with the bolt 15, and then screw the lifting ejector rod 13 into the threaded hole of the block seat 14, adjust the lifting ejector rod The height of 13 adjusts the opening of the intake and exhaust valves;

Secondly, close the exhaust pipe ball valve 17 and open the exhaust pipe ball valve 18 at the same time, set the heating temperature through the control cabinet 3, and the heating tank 2 starts to work. When the preset temperature is reached in the heating tank 2, open the exhaust fan 19 Forced airflow movement can extract air to achieve rapid heating. At this time, the route of the intake heating pipeline is shown by the arrow in Figure 1;

A temperature sensor is installed at the intake and exhaust passages of the cylinder head to detect the intake and exhaust temperature, and when the temperature reaches the temperature required for the operation of the optical engine, the block seat 14, the lift rod 13 and the valve top block 12 can be disassembled; Then, open the exhaust pipe ball valve 17 and close the air suction pipe ball valve 18 at the same time. ;

Finally, when the intake air temperature drops, the exhaust fan 19 can be turned on to utilize the bypass effect of the bypass pipe to assist in strengthening the air extraction.

Turn the lifting jack 13 clockwise, and the lifting jack 13 can move down to act on the valve top block 12, and the valve top block 12 acts on the intake and exhaust valves 8, 10 at the same time to overcome the intake and exhaust valves. The pre-tightening force of the exhaust valve springs 9 and 11 makes the intake and exhaust valves 8 and 10 open at the same time, and the valve opening is maintained by using the self-locking principle of the thread; the lifting mandrel 13 is rotated counterclockwise, Under the force of the intake and exhaust valve springs 9, 11, the intake and exhaust valves 8, 10 move upward at the same time, and the intake and exhaust valves 8, 10 act on the valve top block 12 at the same time, so The above-mentioned valve top block 12 acts on the lifting jack 13; adjusting the height of the lifting jack 13 can adjust the opening degree of the intake and exhaust valves 8, 10, thereby realizing the adjustment of the cross-sectional size of the air extraction passage, and flexible control Intake air temperature.

When non-heating, the state of the two ball valves is that the ball valve of the exhaust pipe is 17 open, and the ball valve of the exhaust pipe is 18; 2. The spatial position of the exhaust pipe ball valve 17 and the exhaust pipe ball valve 18 is preferably adjacent, and the distance is within 40cm, so as to facilitate the simultaneous operation of the two ball valves.

The air filter 1 is under normal pressure. When the fan 19 is working, a negative pressure is formed in the exhaust pipe 20. Under the pressure difference, the intake air is pumped, so that the air passes through the air filter 1 and the heating tank in sequence. 2. The intake pipe 4, the cylinder, the exhaust pipe 16 and the fan 19 are discharged, and the flow direction of the gas path is shown by the arrow in the accompanying drawing 1.

The above schematically describes the present invention and its implementation, which is not restrictive. What is shown in the drawings is only one of the implementations of the present invention, and the actual structure is not limited thereto. If those skilled in the art are inspired by it, without departing from the inventive concept of the present invention, adopting other forms of transmission, driving devices and connection methods without creatively designing structural methods and embodiments similar to the technical solution, all Should belong to the protection scope of the present invention.

Claims (2)

1. a fast air intake heating device for an optical engine, is characterized in that: it comprises cylinder and the heating tank that links to each other with heating control cabinet, in the cylinder head of described cylinder, exhaust duct and air intake duct are arranged, in place An exhaust valve is arranged in the cylinder head at the air inlet of the exhaust passage, an air intake valve is arranged in the cylinder head at the air outlet of the air inlet, and the air inlet of the heating tank is connected to the The air outlet of the air filter is connected, one end of the air inlet pipe is connected with the air outlet of the heating tank and the other end of the air inlet pipe is connected with the air inlet of the air inlet, and one end of the exhaust pipe is connected with the outlet of the exhaust pipe and the other end communicates with the outside atmosphere. An exhaust pipe ball valve is installed on the exhaust pipe, and one end of the exhaust pipe communicates with the exhaust pipe between the exhaust pipe ball valve and the air inlet of the exhaust pipe. And along the exhaust direction of the exhaust pipe, a ball valve and a fan are installed in sequence. The other end of the exhaust pipe communicates with the outside atmosphere, and one end of the bypass pipe connects with the air inlet located at the air inlet of the air intake pipe. The air pipe is connected and the other end is connected with the exhaust duct between the exhaust pipe ball valve and the fan. The diameter of the bypass pipe is smaller than the diameter of the inlet and exhaust pipes. The sensor has a hole on the cylinder head of the cylinder above the intake and exhaust valves, and a valve top block is arranged in the hole. An intake valve spring and an exhaust valve spring are respectively connected between the door and the valve top block, and a lifting jack is fixed vertically on the valve jack, and the upper part of the lifting jack is threaded with the block seat. It is connected to adjust the opening degree of the intake valve and the exhaust valve by adjusting the height of the lifting mandrel, and the two sides of the block seat are fixed to the cylinder head by bolts fastened on the cylinder head. 2. optical engine fast air intake heating device according to claim 1, is characterized in that: the space position of described exhaust pipe ball valve and exhaust pipe ball valve is adjacent, and distance is within 40cm.