JPH071990A - Throttle device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide an inexpensive throttle device capable of traction control and constant speed traveling control. [Structure] An accelerator pedal 13 that adjusts an opening degree in cooperation with a first throttle valve 11, a motor 16 that adjusts an opening degree in cooperation with a second throttle valve 12, and a constant speed running control of a first throttle valve. Predetermined opening drive means 20 that sometimes drives to a predetermined opening degree, travel speed detection means that detects the travel speed of the vehicle, target speed determination means 30 that sets the target speed of the vehicle, and travel speed detection during constant speed travel control. A throttle device having a motor control means 30 for driving a motor in a direction in which a vehicle speed signal from the means and a target speed value from the target speed determination means are compared with each other.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to traction control (when the vehicle is accelerated, the driving torque applied to the driving wheels is excessive in relation to the friction coefficient of the road surface, so that the driving wheels slip on the road surface and the vehicle becomes effective. In order to make the traveling speed equal to the target speed by comparing the traveling speed of the vehicle with the target speed,
The present invention relates to a throttle device capable of automatically adjusting the opening of a throttle valve that serves as an engine speed determining means.

[0002]

2. Description of the Related Art As a conventional technique, Japanese Patent Laid-Open No. 4-863 is known.
There is a throttle device disclosed in Japanese Patent Publication No. 49. In this, first and second throttle valves are arranged in series in an intake passage of an engine, and the first throttle valve is interlocked with an accelerator pedal to control opening / closing by a driver.
Further, the second throttle valve is interlocked with the rotary shaft of the motor and is normally in the fully open position, but during traction control, the motor control means drives the motor to an arbitrary opening degree capable of preventing wheel slip. As a result, the output torque of the engine is reduced to prevent wheel slip. In order to enable constant speed traveling control in this throttle device, an actuator for constant speed traveling control as disclosed in, for example, Japanese Patent Application Laid-Open No. 1-262226 is added. In the actuator for constant speed traveling control, the rotation shaft of the motor is interlocked with the first throttle valve, and the motor control means drives the motor to control the opening of the first throttle valve to output the engine output torque. Was adjusted and the constant speed running control was enabled by controlling the running speed of the vehicle so as to match the target speed.

[0003]

In the above-mentioned prior art, a throttle device capable of traction control and constant speed traveling control is provided by adding an actuator for constant speed traveling control to the throttle device capable of traction control. However, in this throttle device, the opening control means for adjusting the opening of the throttle valve, such as the motor and the motor drive means, is expensive for the traction control and the constant speed travel control, respectively. .

A technical object of the present invention is to provide an inexpensive throttle device capable of performing traction control and constant speed traveling control.

[0005]

The technical means taken in the present invention to solve the above-mentioned technical problems include an accelerator pedal for adjusting an opening degree in cooperation with a first throttle valve, and a second throttle valve. A motor that adjusts the opening degree in conjunction with each other, a predetermined opening degree driving means that drives the first throttle valve to a predetermined opening degree when the constant speed traveling control is started, a traveling speed detecting means that detects a traveling speed of the vehicle, and The target speed determining means for setting the target speed and the vehicle speed signal from the traveling speed detecting means and the target speed value from the target speed determining means are compared during constant speed traveling control, and the motor is driven in a direction in which both match. And a motor control means.

[0006]

According to the above technical means, the output torque of the engine is changed to the second torque by the predetermined opening drive means driving the first throttle valve to the predetermined opening during the constant speed traveling control.
It can be adjusted by the opening of the throttle valve. Then, the motor control means controls the opening / closing of the second throttle valve via the motor, so that the output torque of the engine is adjusted and the constant speed traveling control is performed so that the traveling speed of the vehicle matches the target speed. Further, in the traction control, the motor control means drives the second throttle valve through the motor to a predetermined opening degree to prevent the wheel from slipping, thereby reducing the output torque of the engine and driving the wheel excessively. Wheel slippage is prevented by applying no force.

As described above, since the traction control and the constant speed traveling control are possible with one opening control means for adjusting the opening of the throttle valve, an inexpensive throttle device is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the outline of a throttle device of this embodiment. In the figure, a first throttle valve 11 and a second throttle valve 12 are arranged in an intake passage 10 of an engine (not shown). The first throttle valve 11 has an engaging portion 11a, and the engaging portion 11a is constantly urged in a direction of closing the first throttle valve 11 by a spring 11b. or,
The interlocking part 13a interlocking with the accelerator pedal 13 and the interlocking part 20 of the negative pressure actuator 20 serving as a predetermined opening driving means.
is engaged with a. Interlocking part 13a of the accelerator pedal
Is always urged in the direction of returning the accelerator pedal 13 by the springs 14 and 15. When the accelerator pedal 13 is depressed, the engaging portion 13 corresponds to the depression amount.
a to the right in the figure (the opening direction of the first throttle valve 11)
It is designed to be moved to. Negative pressure actuator 2
0 means that the pressure in the control pressure chamber 21 decreases and the flexible member 22
When the spring moves in the right direction in the drawing against the urging force of the spring 23, the interlocking portion 20a is also moved in the same direction and the first throttle valve 11 moves in the right direction in the drawing (the opening direction of the first throttle valve 11). ). Further, the interlocking portion 20a of the negative pressure actuator 20 is provided with one terminal 27a of an operation detection switch serving as operation detection means. The one operation detection switch 27a is separated from and connected to the other terminal 27b,
The control device 30 can confirm whether or not the negative pressure actuator 20 is operating. The control pressure chamber 21 can communicate with the atmosphere or the negative pressure tank 25 via the solenoid valve 24, and the control device 30 switches the solenoid valve 24 to change the pressure in the control pressure chamber 21. To be Since the negative pressure tank 25 described above communicates with the intake passage 10 through the check valve 26, even if the negative pressure in the negative pressure tank 25 is consumed, the intake passage 10 is less than the pressure in the negative pressure tank 25. When the negative pressure becomes too low, the check valve 26 opens and the intake passage 1 is placed in the negative pressure tank 25.
Negative pressure within 0 will be stored. On the other hand, the second throttle valve 12 is provided with a rack portion 12a that meshes with a pinion gear 17 that interlocks with a rotating shaft 16a of the motor 16, and is a control device 30 that is a motor driving means.
When the motor 16 is driven by this and the rotating shaft 16a rotates, the second throttle valve 12 is moved in the left-right direction in the drawing via the pinion gear 17 and the rack portion 12a, and the opening / closing of the intake passage 10 is controlled.

The second throttle valve 12 is provided with a throttle opening detection device 12b, and the accelerator pedal 13 is provided with an accelerator pedal operation amount detection device 13b. Output signals from these detection devices are motor control means and target speed. It is output to the control device 30 which also serves as the determining means and the abnormality determining means. Further, when the constant speed traveling switch is turned on, the control device 30 adjusts the motor output in order to adjust the engine output so that the vehicle speed obtained from the output signal of the vehicle speed sensor (not shown) approaches the target speed.
Is driven to adjust the opening degree of the second throttle valve 12.

During normal driving, the second throttle valve 1
2 is in the fully open position, the first throttle valve 11
The output torque of the engine is obtained according to the opening degree of. At this time, the opening and closing of the first throttle valve changes according to the amount of depression of the accelerator pedal 13 by the driver.

Further, on a low μ road (for example, a snow road or an icy road), an excessive output torque is generated from the rotating shaft of the engine, and the control device 30 causes the drive wheels of the vehicle to slip on the road surface via the wheel sensors. When it is detected that the vehicle is present, the control device 30 drives the motor 16 to drive the second throttle valve 12 to a position where the driving wheels do not slip. As a result, the amount of the air-fuel mixture sucked into the combustion chamber of the engine can be reduced, so that the output torque of the engine is reduced, the rotational torque of the drive wheels is reduced, and the wheels and the road surface are gripped. In this way, wheel slip is prevented.

When the driver turns on the constant speed traveling switch while the vehicle is traveling, the control device 30 causes the motor 1 to operate.
6 to drive the second throttle valve 12 to a predetermined opening (opening for bringing the vehicle speed close to the target speed value). After the second throttle valve 12 is adjusted to the above-mentioned predetermined opening degree, a current is passed through a coil inside the solenoid valve 24 that normally connects the control pressure chamber 21 and the atmosphere, and the control pressure chamber 21 and the negative pressure tank 25 is communicated with. As a result, the pressure in the control pressure chamber 21 decreases, and along with this, the flexible member 22
Also, the interlocking portion 20a is moved rightward in the drawing, and the first throttle valve 11 engaged with the interlocking portion 20a is moved rightward in the drawing to be driven to a predetermined opening (fully open position). At this time, in this embodiment, the first throttle valve 1
Although 1 is a predetermined opening and is driven to the fully open position, the opening may be larger than that of the second throttle valve 12 during constant speed traveling control. On the other hand, the control device 30 drives the motor 16 to drive the second throttle valve 1
The constant speed traveling control is performed by adjusting the opening degree of 2 and controlling the output of the engine so that the vehicle traveling speed matches the target speed.

Further, the accelerator pedal 13 is used during constant speed running control.
When the pedal is depressed and the output signal of the accelerator pedal operation amount detecting device exceeds a value corresponding to the second throttle valve 12, only the second throttle valve 12 corresponding to the exceeded value.
Is opened and the vehicle is accelerated.

When the accelerator pedal 13 is released, the constant speed traveling control at the same speed as before the accelerator pedal 13 is depressed is performed.

Further, at the start of the constant speed traveling control, the control device 30 drives the motor 16 to adjust the second throttle valve 12 to an opening degree for bringing the vehicle speed close to the target speed value, and then the solenoid valve. By switching 24 to communicate the control pressure chamber 21 and the negative pressure tank 25,
It is possible to prevent a sudden increase in the output torque of the engine due to the negative pressure actuator 20 opening the first throttle valve 11 to the fully open position.

Further, by providing the negative pressure tank 25, the pressure in the intake passage does not become a negative pressure temporarily unlike the intake passage of an engine equipped with a supercharger and the intake passage during a long climb. Also in this case, the pressure in the control pressure chamber can be made negative.

Here, the solenoid valve 24 is opened / closed by the control device 30, but if the solenoid valve 24 is opened / closed in conjunction with the constant speed traveling switch, the control device 3 is operated.
Even if 0 fails due to a short circuit or the like, the constant speed traveling control can be ended.

Next, the control device 30 detects from the signal of the operation detection switch 27 of the negative pressure actuator 20 that the negative pressure actuator 20 does not return to the initial position even if the constant speed traveling switch is turned off, and an abnormality is detected. When the situation is judged, the control device 30 can drive the motor 16 based on the signal from the accelerator pedal operation amount detection device 13b to adjust the opening degree of the second throttle valve 12 for normal traveling.

[0020]

The effect of the invention of claim 1 will be described. First
An accelerator pedal that adjusts the opening degree in cooperation with the throttle valve, a motor that adjusts the opening degree in conjunction with the second throttle valve, and a predetermined opening that drives the first throttle valve to a predetermined opening degree when the constant speed traveling control is started. Degree driving means, traveling speed detecting means for detecting the traveling speed of the vehicle, target speed determining means for setting the target speed of the vehicle, vehicle speed signal from the traveling speed detecting means and target speed determining means during constant speed traveling control. Is a throttle device having a motor control means for driving a motor in a direction in which the target speed value and the target speed value are matched with each other, and the predetermined opening drive means sets the first throttle valve to a predetermined value during constant speed traveling control. By driving to the opening, the output torque of the engine can be adjusted by the opening of the second throttle valve. Then, the motor control means controls the opening / closing of the second throttle valve via the motor, so that the output torque of the engine is adjusted and the constant speed traveling control is performed so that the traveling speed of the vehicle matches the target speed.
Further, in the traction control, the motor control means drives the second throttle valve through the motor to a predetermined opening degree to prevent the wheel from slipping, thereby reducing the output torque of the engine and driving the wheel excessively. Wheel slippage is prevented by applying no force.

As described above, since only one opening control means for adjusting the opening of the throttle valve can perform traction control and constant speed traveling control, an inexpensive throttle device is provided.

The effect of the invention of claim 2 will be described. The predetermined opening drive means communicates with the intake passage and a negative pressure actuator that drives the second throttle valve in the opening direction by negative pressure in the intake passage, and a solenoid valve that selects communication between the negative pressure actuator and the intake passage or the atmosphere. And a solenoid valve for connecting the negative pressure actuator and the intake passage, or the communication between the negative pressure actuator and the atmosphere by means of an electromagnetic valve, whereby the first throttle valve can be easily driven to a predetermined position. .

The effect of the invention of claim 3 will be described. It has a switch means for selecting the start or end of the constant speed traveling control,
A throttle device in which a switch means is arranged between a power supply circuit of the solenoid valve and the solenoid valve, and the communication of the solenoid valve can be switched by the switch means even if the control device fails due to a short circuit or the like. The first throttle valve can be returned to the initial position, and the opening degree of the first throttle valve can be adjusted by the accelerator pedal.

The effect of the invention of claim 4 will be described. A throttle device having a negative pressure tank for storing a negative pressure, which is disposed via a check valve on a communication pipe that communicates an intake passage and a negative pressure actuator, and is used for an intake passage of an engine equipped with a supercharger and a long passage. Negative pressure can be supplied to the negative pressure actuator even when the pressure in the intake passage temporarily does not become negative, as in the intake passage when climbing a slope.

The effect of the invention of claim 5 will be described. An operation amount detecting means for detecting an operation amount of the accelerator pedal is provided, and the second operation is performed according to an output signal of the operation amount detecting means during constant speed traveling control.
A throttle device for increasing the opening of a throttle valve, the second throttle valve responding to an output signal of an operation amount detecting means when a driver's temporary acceleration request and a depression of an accelerator pedal occur during constant speed running control. The opening degree of is increased and the vehicle can be accelerated.

The effect of the invention of claim 6 will be described. An operation detecting means for detecting whether or not the predetermined opening driving means is operating, and an abnormality determining means for detecting an abnormality in the operating state of the predetermined opening driving means by a signal from the operation detecting means,
A throttle device for controlling opening / closing of a second throttle valve based on an output signal of the manipulated variable detecting means when the abnormality determining means detects an abnormality of the predetermined opening driving means, and the predetermined opening is performed even when the constant speed traveling control is completed. If the degree drive means does not return to the initial position, the opening of the first throttle valve cannot be adjusted by the accelerator pedal. Therefore, if the abnormality determination means detects an abnormality in the predetermined opening drive means, the motor control means detects the operation amount. By controlling the motor according to the output signal of the means to adjust the opening of the second throttle valve, normal traveling becomes possible.

The effect of the invention of claim 7 will be described. A throttle device for driving the first throttle valve to a predetermined opening by the predetermined opening driving means after the second throttle valve is driven to a predetermined opening by the motor control means at the start of constant speed traveling control, It is possible to prevent a sudden increase in the output torque of the engine when the first throttle valve is driven to the predetermined opening by the predetermined opening driving means at the start of the constant speed traveling control.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an outline of a throttle device according to the present invention.

[Explanation of symbols]

 10 ... Intake passage 11 ... First throttle valve 11a ... Engagement portion 12 ... Second throttle valve 12a ... Rack portion 12b ... Second throttle valve opening detection device 13. ..Accelerator pedal 13a ... Interlocking part 13b ... First throttle valve opening detection device 16 ... Motor 17 ... Pinion gear 20 ... Negative pressure actuator 20a ... Interlocking part 21 ... Control pressure chamber 22 ... Flexible member 24 ... Solenoid valve 25 ... Negative pressure tank 26 ... Check valve 30 ... Control device

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hiroshi Amano 2-1, Asahi-cho, Kariya city, Aichi Prefecture Aisin Seiki Co., Ltd. (72) Inventor Noboru Shibata 2-chome, Asahi-cho, Kariya city, Aichi prefecture Address Aisin Seiki Co., Ltd.

Claims (7)

[Claims] 1. A throttle device having first and second throttle valves arranged in series in an intake passage of an engine, and an accelerator pedal for adjusting an opening degree in cooperation with the first throttle valve; (2) A motor that adjusts the opening in cooperation with the throttle valve, a predetermined opening driving means that drives the first throttle valve to a predetermined opening when the constant speed running control is started, and a running speed detection that detects the running speed of the vehicle. Means, a target speed determining means for setting a target speed of the vehicle, and a vehicle speed signal from the traveling speed detecting means and a target speed value from the target speed determining means during constant speed traveling control, and both are matched. And a motor control means for driving the motor. 2. A negative pressure actuator that drives the second throttle valve in an opening direction by the predetermined opening driving means communicating with the intake passage and a negative pressure in the intake passage, and the negative pressure actuator and the intake air. The throttle device according to claim 1, further comprising a solenoid valve that selects communication with a passage or the atmosphere. 3. A switch means for selecting start or end of the constant speed traveling control, wherein the switch means is arranged between a power supply circuit of the solenoid valve and the solenoid valve.
The described throttle device. 4. The throttle device according to claim 2, further comprising a negative pressure tank, which is arranged via a check valve, on a communication pipe that connects the intake passage and the negative pressure actuator, and stores a negative pressure. 5. An operation amount detecting means for detecting an operation amount of the accelerator pedal is provided, and the opening degree of the second throttle valve is increased in response to an output signal of the operation amount detecting means during the constant speed traveling control. The throttle device according to any one of claims 1 to 4. 6. An operation detecting means for detecting whether or not the predetermined opening driving means is operating, and an abnormality determining means for detecting an abnormality in an operating state of the predetermined opening driving means based on a signal from the operation detecting means. 6. The throttle device according to claim 5, further comprising: and controlling the opening and closing of the second throttle valve based on an output signal of the manipulated variable detecting means when the abnormality determining means detects an abnormality of the predetermined opening driving means. 7. The predetermined opening driving means sets the first throttle valve to the predetermined opening degree after the second throttle valve is driven to the predetermined opening degree or less by the motor control means at the start of the constant speed traveling control. Driving to
7. The throttle device according to claim 6.