JP2004092550A - Throttle control device for in-vehicle internal combustion engine - Google Patents

Abstract

An object of the present invention is to provide a throttle control device for an in-vehicle internal combustion engine, in which the operation feeling of a throttle operator is adapted to the operation state of the internal combustion engine and the valve opening degree control of the throttle valve can be performed with high accuracy.
A biasing means for biasing a throttle valve in an opening direction, an operating angle detecting means for detecting an operating angle of a throttle operator, an operating angle detected by the operating angle detecting means, and the like. An electric control mechanism for controlling the opening degree of the throttle valve 3 against the urging means 6 at a control angle smaller than the operating angle by driving the driving means 24 based on the operating angle of the throttle operating member 15. The valve opening of the throttle valve 3 is finally regulated, and the valve of the throttle valve 3 is controlled based on an operation angle smaller than the control angle by operating the throttle operator 15 in a valve closing direction faster than the response speed of the electric control mechanism. A throttle control device for a vehicle-mounted internal combustion engine, comprising: a mechanical control mechanism that controls an opening by mechanical transmission of an operating force.
[Selection diagram] Fig. 1

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an apparatus for controlling a valve opening of a throttle valve of a vehicle-mounted internal combustion engine.
[0002]
[Prior art]
The throttle valve of the vehicle-mounted internal combustion engine is driven based on the driver's operation of a throttle operator such as a throttle grip and an accelerator pedal. Due to the characteristics described above, a difference occurs between the operating state of the internal combustion engine and the operating feeling of the throttle.
[0003]
Therefore, there is an example in which an actuator capable of controlling the opening and closing of a throttle valve is provided independently of the operation of the throttle operator so as to match the driver's operation feeling (U.S. Pat. No. 2,509,016 to the same applicant). .
[0004]
The example is shown in FIG.
A throttle valve 02 is fixed to a valve shaft 03 and is rotatably provided in an intake pipe 01 of the internal combustion engine. A throttle directly connected lever 04 is fitted to the valve shaft 03, and is urged in a valve closing direction by a return spring 05. Have been.
[0005]
A throttle drum 07 rotatably supported by the valve shaft 03 is provided opposite to the throttle directly connected lever 04, and a lost motion spring 08 is interposed between the two.
[0006]
The throttle drum 07 is connected to an accelerator pedal 09 by a wire 010. When the accelerator pedal 09 is depressed, the throttle drum 07 is turned in the opening direction of the throttle valve, and the throttle direct connection lever 04 follows the lost motion spring 08. And the throttle valve 02 can be driven in the valve opening direction.
[0007]
The throttle drum 07 and the throttle direct connection lever 04 are urged by a lost motion spring 08 so that the protruding arm 07a and the bar 04a come into contact with each other.
[0008]
On the other hand, a throttle closing lever 021 that rotates coaxially with the valve shaft 03 is driven by a pulse motor 023 via a link mechanism 022, and the throttle closing lever 021 and the throttle directly connected lever 04 project from each other. The bar 021a and the bar 04b are in contact with each other, and the throttle closing lever 021 can be controlled so as to regulate the throttle valve 02 in the closing direction.
[0009]
Therefore, the rotation of the throttle drum 07 caused by depressing the accelerator pedal 09 causes the throttle direct coupling lever 04 to follow the lost motion spring 08. To control the opening and closing of the throttle valve to match the driver's operational feeling.
[0010]
[Problems to be solved by the invention]
However, since the lost motion spring 08 is interposed between the throttle direct coupling lever 04 integrated with the throttle valve 02 and the throttle drum 07 linked to the accelerator pedal 09, it acts on the throttle closing lever 021 that regulates the throttle direct coupling lever 04. The spring force of the lost motion spring 08 fluctuates depending on the driving state, and may affect the driver's operation feeling, which may affect high-precision valve control.
[0011]
In addition, when the throttle closing lever 021 is driven in the valve opening direction by the pulse motor 023, the lost motion spring 08 is slackened, so that the depression feeling of the accelerator pedal 09 changes.
[0012]
The present invention has been made in view of the above point, and an object thereof is to perform a throttle opening control of a throttle valve with high accuracy by adapting an operation feeling of a throttle operator to an operation state of an internal combustion engine. And a throttle control device for a vehicle-mounted internal combustion engine.
[0013]
Means for Solving the Problems and Functions and Effects
In order to achieve the above object, the invention according to claim 1 includes an urging means for urging a throttle valve in a valve opening direction, an operation angle detecting means for detecting an operation angle of a throttle operator, and the operation angle. An electrical control mechanism that drives the drive unit based on the operation angle or the like detected by the detection unit and regulates and controls the valve opening of the throttle valve at a control angle smaller than the operation angle against the urging unit; The valve opening degree of the throttle valve is finally regulated by the operation angle of the throttle operator, and the operation angle smaller than the control angle by the valve closing direction operation of the throttle operator faster than the response speed of the electric control mechanism. And a mechanical control mechanism for controlling the opening degree of the throttle valve by mechanical transmission of an operating force based on the above.
[0014]
Since there is no spring such as a lost motion spring acting between the throttle operator and the throttle valve, the spring force fluctuating according to the operation state of the internal combustion engine does not act on the drive means and the throttle valve. Valve opening and closing control can be performed with high accuracy.
Further, since the spring force that fluctuates on the throttle operator does not act, the driver does not feel uncomfortable with the operation feeling.
[0015]
Normally, the opening degree of the throttle valve is regulated and controlled by the electric control mechanism at a control angle smaller than the operation angle against the urging means, so that the operation feeling of the throttle operator can be adapted to the operating state of the internal combustion engine. .
[0016]
Since the mechanical control mechanism finally regulates the valve opening of the throttle valve according to the operation angle of the throttle operator, even if the electrical control mechanism has an abnormality, the valve opening must be regulated by operating the throttle operator. Can be.
[0017]
Since the valve opening degree of the throttle valve is controlled by mechanical transmission of the operating force based on the operation angle that is smaller than the control angle due to the closing direction operation of the throttle operator that is faster than the response speed of the electric control mechanism, when cornering, The throttle valve can be quickly closed by a driver's operation, and therefore, a small-sized one can be employed without requiring high responsiveness in the driving means of the electric control mechanism.
[0018]
According to a second aspect of the present invention, in the throttle control device for an on-vehicle internal combustion engine according to the first aspect, an engaging member is provided so as to protrude from a valve shaft that rotates integrally with the throttle valve. An electric drive member is provided to oppose the valve-opening side of the engagement member, usually abut against the valve-opening side to form the control angle, rotate and regulate and control the engagement member, and the mechanical control mechanism includes the electric drive member. A mechanical drive member capable of forming the operation angle in opposition to the valve opening side of the combined member and rotating and controlling the engagement member so as not to interfere with the rotation restriction member is provided. Features.
[0019]
An electric drive member that forms a control angle for the engaging member protruding from the valve shaft and a mechanical drive member that forms an operating angle are simple structures for controlling the engaging member protruding from the valve shaft. .
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment according to the present invention will be described below with reference to FIGS.
FIG. 1 is a schematic configuration diagram of a throttle control device 1 for a vehicle-mounted internal combustion engine according to the present embodiment.
[0021]
A throttle valve 3 is fixed to a valve shaft 4 so as to be rotatable (openable and closable) in an intake pipe 2 of the internal combustion engine, and an engagement piece 5 is provided at an end of the valve shaft 4 to protrude therefrom. Are urged by the open spring 6 in the valve opening direction.
The valve shaft 4 is provided with a valve opening potentiometer 7 for detecting the valve opening of the throttle valve 3.
[0022]
An operation drum 11 is integrally fitted to a separate operation rotation shaft 10 coaxial with the valve shaft 4, and an operation system engagement pin 12 projecting from a side surface of the operation drum 11 faces the engagement piece 5. It is provided so as to be abuttable in a positional relationship that restricts rotation of the valve shaft 4 in the valve opening direction by the open spring 6.
[0023]
The operation drum 11 is connected to a throttle grip 15 for performing acceleration / deceleration control by a driver via an endless wire 16 so that operation force in both directions of acceleration / deceleration can be transmitted. The operation system engagement pin 12 is rotated by being transmitted.
[0024]
The operation rotary shaft 10 is urged by the return spring 13 in the deceleration operation direction of the throttle grip 15 (the rotation direction in which the throttle valve 3 is closed), and the end of the operation rotary shaft 10 detects an operation angle. An operating angle potentiometer 14 is provided.
[0025]
On the other hand, a spur gear 20 opposed to the operation drum 11 with the engaging piece 5 interposed therebetween is rotatably supported on the valve shaft 4 via a bearing 21 independently of the valve shaft 4. A motor system engaging pin 22 is protruded from a side surface of the gear 20 facing the operation drum 11.
[0026]
The motor-system engagement pin 22 is provided so as to be able to abut on the engagement piece 5 in a positional relationship that restricts rotation of the valve shaft 4 in the valve opening direction by the open spring 6.
It should be noted that the motor system engaging pin 22 has a positional relationship that does not interfere with the operation system engaging pin 12.
[0027]
The drive gear 23 meshing with the gear 20 is fitted to the drive shaft of the drive motor 24, and the drive of the drive motor 24 causes the motor system engagement pin 22 to rotate via the mesh between the drive gear 23 and the gear 20. I do.
[0028]
The throttle control device 1 is configured as described above, and the opening degree of the throttle valve 3 urged in the opening direction by the open spring 6 is rotated by mechanical control of the operation of the throttle grip 15. The operating system engaging pin 12 or the motor system engaging pin 22 that is rotated by the drive of the drive motor 24 related to the electrical control acts on the engaging piece 5 integral with the throttle valve 3 and is regulated.
[0029]
The drive of the drive motor 24 is controlled by a control unit 30 by a microcomputer. As shown in FIG. 2, detection signals of the operation angle potentiometer 14 and the valve opening potentiometer 7 are input to the control unit 30. At the same time, detection signals of an intake pressure sensor 31 for detecting a pressure in an intake pipe of the internal combustion engine and a crank angle sensor 32 for detecting a crank angle position are input.
[0030]
The throttle valve opening is controlled so that the intake pipe pressure should achieve the engine speed corresponding to the operation angle of the throttle grip 15, but as shown in the throttle valve opening characteristic with respect to the operation angle in FIG. The relationship between the operation angle of the grip 15 and the throttle valve opening degree is not a linear relationship (broken line in FIG. 3), and has a characteristic as shown by a real curve in which the throttle valve opening degree is suppressed low with respect to the operation angle. With this control, the driver's operational feeling of the throttle grip 15 matches the operating state of the internal combustion engine.
[0031]
Accordingly, the control angle of the drive motor 24 for regulating and controlling the valve opening of the throttle valve 3 by the motor system engagement pin 22 is usually smaller than the operation angle of the throttle grip 15 by the operation system engagement pin 12. Is in contact with the engagement piece 5, and the valve opening of the throttle valve 3 is controlled by the control angle.
[0032]
That is, when the throttle grip 15 is rotated in the speed increasing direction, the operating system engaging pin 12 is rotated via the wire 16 in the valve opening direction, and the motor system engaging pin 22 is delayed with respect to the operating system engaging pin 12. Is rotated in the valve opening direction by the drive of the drive motor 24, the engagement piece 5 biased by the open spring 6 abuts on the motor system engagement pin 22, and the throttle valve 3 is controlled to open. .
[0033]
Conversely, when the throttle grip 15 is rotated in the deceleration direction, the engagement piece 5 abuts on the motor system engagement pin 22 that rotates forward in the valve closing direction of the operation system engagement pin 12 and is regulated. The closing of the throttle valve 3 is controlled by the control angle of the engagement pin 22.
[0034]
As described above, the opening degree of the throttle valve 3 is controlled by the control angle of the drive motor 24 which is smaller than the operation angle of the normal throttle grip 15, so that the driver feels the operation feeling of the throttle grip 15 suitable for the operating state of the internal combustion engine. Obtainable.
[0035]
The operating rotary shaft 10 and the valve shaft 4 are completely independent, and there is no spring between them, such as a lost motion spring.
That is, since there is no spring acting between the throttle grip 15 and the throttle valve 3, the spring force fluctuating according to the operation state of the internal combustion engine does not act on the drive motor 24 and the throttle valve 3, and the throttle valve 3 Can be controlled with high accuracy.
[0036]
Further, since the spring force that fluctuates on the throttle grip 15 does not act on the throttle grip 15, the driver does not feel uncomfortable with the operation feeling.
[0037]
Further, by controlling the drive motor 24, the operation angle of the operation system engaging pin 12 that is smaller than the control angle of the motor system engaging pin 22 by the valve closing direction operation of the throttle grip 15 faster than the response speed at which the motor system engaging pin 22 rotates. The valve opening of the throttle valve 3 can be controlled by mechanical transmission of the operating force based on the operating angle.
[0038]
For example, when the motorcycle enters the corner, a high-speed response speed of 80 msec at the maximum is required for closing the throttle valve 3 from 100% to 0% at a stroke. Can be executed by the valve closing direction operation.
[0039]
Therefore, the response speed of the drive motor 24 in the valve closing direction is not required to be as high as described above, and depends on the maximum speed in the valve opening direction. Therefore, the required performance can be reduced and a smaller drive motor can be employed. it can.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a throttle control device according to an embodiment of the present invention.
FIG. 2 is a schematic block diagram of a control system of a drive motor.
FIG. 3 is a diagram showing characteristics of a throttle valve opening degree with respect to an operation angle.
FIG. 4 is a schematic configuration diagram of a conventional throttle control device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Throttle control device, 2 ... Intake pipe, 3 ... Throttle valve, 4 ... Valve shaft, 5 ... Engagement piece, 6 ... Open spring, 7 ... Valve opening potentiometer,
DESCRIPTION OF SYMBOLS 10 ... Operation rotating shaft, 11 ... Operation drum, 12 ... Operation system engagement pin, 13 ... Return spring, 14 ... Operation angle potentiometer, 15 ... Throttle grip, 16 ... Wire,
Reference numeral 20: gear, 21: bearing, 22: motor system engaging pin, 23: drive gear, 24: drive motor,
30: control unit, 31: intake pressure sensor, 32: crank angle sensor.

Claims (2)

Biasing means for biasing the throttle valve in the valve opening direction;
Operating angle detecting means for detecting an operating angle of a throttle operator,
An electric control mechanism for controlling the opening degree of the throttle valve at a control angle smaller than the operating angle by controlling the driving means based on the operating angle detected by the operating angle detecting means against the urging means; When,
An operation in which the valve opening degree of the throttle valve is finally regulated by the operation angle of the throttle operator, and the control angle becomes smaller than the control angle by the valve closing direction operation of the throttle operator faster than the response speed of the electric control mechanism. A mechanical control mechanism for controlling the valve opening of the throttle valve by mechanical transmission of an operating force based on the angle. An engagement member protrudes from a valve shaft that rotates integrally with the throttle valve,
The electric control mechanism is provided with an electric drive member that opposes the valve-opening side of the engagement member, normally contacts and forms the control angle to rotate and regulate and control the engagement member,
A mechanical control mechanism configured to form the operation angle in opposition to the valve opening side of the engagement member and to rotate and control the engagement member so as not to interfere with the rotation restriction member; 2. The throttle control device for a vehicle-mounted internal combustion engine according to claim 1, further comprising a driving member.

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