JPH07164917A - Constant speed traveling control device for vehicle - Google Patents

Abstract

PURPOSE:To improve durability of an electromagnetic clutch mechanism by reducing state switching frequency of the electromagnetic clutch mechanism. CONSTITUTION:A motor is driven so that actual throttle opening conforms with target throttle opening set by a target throttle opening setting means as well as an electromagnetic clutch 22 is driven so that a throttle valve 9 and the motor (throttle valve driving means) 21 are connected to each other at the time when a constant speed traveling condition is established. A throttle opening control means which drives the throttle valve 9 to a totally closed range while driving an electromagnetic clutch mechanism at the time of switching to non-establishment from establishment of the constant speed traveling condition and which interlocks the throttle valve 9 with an accelerator pedal 2 and an abnormality judging means which judges whether the motor 21 is driven in the direction of close driving the throttle valve 9 on the basis of a condition of the motor 21 and which drives the electromagnetic clutch 22 to separate the throttle valve 9 from the motor 21 by way of judging it as abnormal in the case when the motor 21 is not driven in the direction of close driving the throttle valve 9 are furnished.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle drive output control device having a constant speed running function capable of running a vehicle at a constant speed.

[0002]

2. Description of the Related Art In recent years, there has been known a constant speed traveling device which allows a vehicle to travel at a constant speed without depressing an accelerator pedal. This device stores a desired vehicle speed as an electric signal, compares the desired value with an actual vehicle speed detected by a vehicle speed detection sensor, and controls the opening of the throttle valve based on the result. . Since this device runs at a constant speed for a long time without pressing the accelerator pedal, it is extremely effective when running on a highway. However, with this, constant speed vehicle speed setting, acceleration, deceleration, etc. are performed by the driver operating the switch in the driver's seat, and the constant speed traveling is canceled especially by the brake operation, so on a congested road Frequent resetting of the constant-speed driving is required, and the driver's operation amount increases.

Therefore, as a technique for reducing the above-mentioned operation amount, a technique disclosed in Japanese Patent Laid-Open No. 60-206950 is known. This is because the correlation between the amount of accelerator depression by the driver and the target acceleration of the vehicle is stored in memory in advance, and the amount of accelerator depression by the driver is converted into the target value of running acceleration, and the amount of change in vehicle speed during the sampling time is converted. The actual acceleration is calculated from the above, and when there is a difference between the actual acceleration and the target acceleration, the throttle opening / closing speed is calculated so as to eliminate the difference. Based on this, the target throttle opening is calculated and the servo drive means is calculated. What is output is disclosed. In this structure, when the amount of depression of the accelerator pedal or the brake pedal is zero, the vehicle always travels at a constant speed, so that complicated switch operation is unnecessary.

[0004]

However, in this method, since the depression amount of the accelerator pedal is converted into the target acceleration of the vehicle, it is based on the depression amount of a general vehicle having no constant speed running function, that is, the depression amount of the accelerator pedal. Compared with the one in which the throttle opening is determined, the movement of the throttle valve with respect to the amount of depression of the accelerator pedal, that is, the accelerator feel, which is the driver's sense of foot, is different. Therefore, when the driver changes from a general vehicle that does not have the constant speed traveling function to one that converts the depression amount of the accelerator pedal into the target acceleration of the vehicle or vice versa, the difference in accelerator feel Therefore, the driver is likely to feel confused and is disadvantageous in terms of safety.

Further, since the mechanical brake braking force is applied to the wheels only when the brake stroke exceeds the predetermined stroke, even if the driver depresses the brake pedal, if the stroke is smaller than the predetermined stroke. Braking force is not applied. Therefore, if the brake pedal is lightly stepped, the braking force is more dangerous than in a general vehicle in which the brake braking force is applied to the wheels, and the braking force with respect to the amount of depression of the brake pedal, that is, the driver's brake feel is different from that in a general vehicle. . Therefore, if the brake pedal force is applied to the wheels by simply stepping on the brake pedal, or if the vehicle is switched from the other, or vice versa, the driver is likely to feel confused due to the difference in the brake feel, which is sufficient for safety. is not.

Therefore, according to the present invention, when the driver changes from a conventional vehicle in which the throttle opening is controlled according to the amount of depression of the accelerator paddal or vice versa, the driver feels uncomfortable and uncomfortable in the accelerator feel. In addition, when the driver lightly depresses the brake pedal, the brake braking force is applied to the wheels when changing from a general vehicle, or vice versa, to reduce the driver's confusion and discomfort in the brake feel.
This is a technical issue.

[0007]

The technical means taken in the present invention to solve the above technical problems is a throttle valve for adjusting the intake air amount of an internal combustion engine and a mechanical drive of the throttle valve. An accelerator pedal, a throttle valve urging means for urging the throttle valve in the closing direction, a vehicle speed detecting means for detecting the current vehicle speed of the running vehicle, and a constant speed running requesting means for requesting the vehicle to run at a constant speed. , Accelerator non-operation detecting means for detecting that the driver is not operating the accelerator pedal, brake non-operation detecting means for detecting that the driver is not operating the brake pedal, and electrically driving the throttle valve Throttle valve drive means, drive means state detection means for detecting the state of the throttle valve drive means, and electromagnetic clutch mechanism for connecting and disconnecting the connection between the throttle valve and the drive means A constant speed running condition determining means for determining that the constant speed running condition is satisfied when the constant speed running is requested, the accelerator pedal is not operated, and the brake is not operated; otherwise, the constant speed running condition is not satisfied. At the time of non-establishment or at the moment of switching from non-establishment to establishment, the target vehicle speed updating means for updating the target vehicle speed to the current vehicle speed detected based on the vehicle speed detecting means and the target vehicle speed updated by the target vehicle speed updating means are displayed. The target throttle opening setting means for setting the target throttle opening so as to match the vehicle speed, and the electromagnetic clutch mechanism is driven so as to connect the throttle valve and the driving means when the condition is satisfied, and the actual throttle opening is set as the target throttle opening. The throttle valve drive means is driven so as to match the target throttle opening degree set by the opening degree setting means; the condition is changed from not satisfied to being not satisfied. The throttle valve drive means is driven to drive the throttle valve to the fully closed region while the electromagnetic clutch mechanism is driven so that the throttle valve and the drive means are connected, and the throttle valve is operated in conjunction with the accelerator pedal. The degree control means and the throttle valve drive means drives the throttle valve to close and drive based on the state of the throttle valve drive means detected by the drive means state detection means when the condition is switched from the satisfied condition to the not satisfied condition. Determine whether or not
An abnormality determining means for driving the electromagnetic clutch mechanism so as to determine the abnormality when the throttle valve driving means is not driving in the direction of closing and driving the throttle valve and separate the throttle valve and the driving means is provided. Is.

A claim correspondence diagram is shown in FIG.

The constant-speed traveling request means is operated when the driver or the controller mounted on the vehicle requests constant-speed traveling of the vehicle. It is also possible to separately provide a non-actuation type. The accelerator non-operation detecting means is a means for directly or indirectly detecting a physical quantity related to the non-operation of the accelerator pedal, and therefore, a method of directly detecting the operation of the accelerator pedal such as a potentiometer, an on / off switch, and a pedaling force sensor, or Engine speed, vehicle speed, intake air volume,
A method of indirectly detecting the operation of the accelerator pedal by the throttle opening or the like may be used. The brake non-operation detecting means is a means for directly or indirectly detecting a physical quantity related to non-operation of the brake pedal, and therefore a method of directly detecting the operation of the brake pedal, such as a potentiometer, an on / off switch, or a pedaling force sensor, or A method of indirectly detecting the operation of the brake pedal by a sensor that confirms the lighting of the brake lamp, a sensor that detects the brake pressure, a vehicle speed sensor, or the like may be used. The vehicle speed detecting means is a sensor that detects the rotational speed of the wheels, a sensor that detects the rotational speed of the crankshaft, or the like.

[0010]

According to the above-mentioned technical means, when the constant vehicle speed condition is not satisfied by the target vehicle speed updating means, or at the moment when the condition is not satisfied, the target vehicle speed is changed to the current vehicle speed detected by the vehicle speed detecting means. Therefore, if constant-speed traveling is requested by the constant-speed traveling requesting means, the vehicle is accelerated by depressing the accelerator pedal, and the vehicle can travel at a constant speed after acceleration. Even if the vehicle is decelerated by operating the brake pedal, the constant speed traveling function is not canceled, and if the operation amount of the brake pedal is set to zero again, the constant speed traveling function is automatically restored and decelerated. It becomes possible to run at a constant speed at that speed. Therefore, the operation amount of the driver can be reduced even on a congested road.

During constant speed running (when there is a request for constant speed running)
When the driver depresses the accelerator pedal, the vehicle is switched to non-constant speed running, so the throttle opening control means drives the throttle valve in the closing direction to mechanically connect the accelerator pedal. The accelerator feel when the accelerator pedal is depressed when the constant speed traveling is requested) matches the accelerator feel when the accelerator pedal is depressed during normal operation (when the constant speed traveling is not required). Therefore, when the driver changes from a vehicle using the above technical means to a vehicle controlled according to the amount of depression of the accelerator pedal, or vice versa, the driver can be less confused and uncomfortable in the accelerator feel. .

Further, since the vehicle can be decelerated by the braking force of the brake simply by the driver lightly stepping on the brake pedal during traveling at a constant speed, when the vehicle is changed from a general vehicle or vice versa, It can reduce awkwardness and discomfort.

Further, when the constant speed running is switched from established to not established, the throttle opening control means does not separate the throttle valve and the throttle valve drive means, and the throttle valve drive means is driven to close so that the entire throttle valve is closed. Since it is returned to the closed region and is linked with the accelerator pedal, it is not necessary to switch the state of the electromagnetic clutch mechanism when the constant speed running is switched to the non-established running. As a result, the durability of the electromagnetic clutch is improved as compared with the case where the electromagnetic clutch mechanism is turned on when the constant speed running is switched to the non-established state, and the electromagnetic clutch mechanism is turned off when the constant speed running is switched to the non-established state. Remarkably improved.

Further, the throttle valve driving means is arranged to drive the throttle valve in the closing direction based on the state of the throttle valve driving means detected by the driving means state detecting means when the constant speed running is switched to the non-establishment. It is determined whether or not it is being driven, and if the throttle valve driving means is not being closed, it is determined to be abnormal and the electromagnetic clutch mechanism is driven so as to separate the throttle valve and the throttle valve driving means. Even if the throttle valve drive means cannot be closed due to some abnormality when switching from the establishment of high speed travel to the establishment of non-establishment, the throttle valve urging means surely returns the throttle valve to the fully closed region, and it is possible to take measures against the abnormality. .

[0015]

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

The present embodiment is applied to a vehicle having a conventional constant speed traveling function. FIG. 1 is a block diagram of a vehicle constant speed traveling control device according to the present embodiment.

In the vehicle constant speed traveling control device shown in FIG. 1, an on / off type main switch 1 as a constant speed traveling requesting means for requesting the vehicle to travel at a constant speed and a driver not operating the accelerator pedal 3 are checked. An on / off type accelerator sensor 2 as an accelerator non-detecting means for detecting, an on / off type brake sensor 5 as a brake non-operation detecting means for detecting that the driver is not operating the brake pedal 4, and a depression of the brake pedal 4 A brake lamp 6 that lights up and a vehicle speed sensor 7 as a vehicle speed detecting means that detects the current vehicle speed of the vehicle are provided. The main switch is installed in the driver's seat.

The accelerator pedal 2 can be connected to a throttle valve 9 via a cable 8c and a link mechanism 8, and the throttle valve 9 is biased in a closing direction by a return spring (biasing means) not shown. here,
When the driver depresses the accelerator pedal 2, the throttle valve 9 interlocks with the cable 8c connected to the accelerator pedal 2 and the mechanical link mechanism 8 to open and close the throttle valve 9.

As a result, the throttle opening is adjusted and the amount of intake air to the engine in the intake passage M is adjusted.

The controller 10 includes an input processing circuit 11
, The microcomputer 12, the motor drive circuit 13, the electromagnetic clutch drive circuit 14, and the main relay 1 for supplying power from the battery 15 to the microcomputer 12 and the circuits 13, 14.
6 and. Signals from the accelerator sensor 3, the brake sensor 5, the main switch 1, and the vehicle speed sensor 7 are input to the microcomputer 12 via the input processing circuit 11.

The constant speed actuator 20 is operated during constant speed traveling, and includes a motor (throttle valve driving means) 21 and an electromagnetic clutch (electromagnetic clutch mechanism) 22. The motor 21 is driven by a motor drive circuit 13, and the electromagnetic clutch 22 is an electromagnetic clutch drive circuit 14
Driven by. The state of the motor 21 is detected by a potentiometer (driving means state detecting means) 23,
The state of the motor 21 may be detected by providing a throttle sensor (not shown) and detecting the throttle opening.
Here, during normal operation, the throttle valve 9 is opened and closed via the cable 8c and the mechanical link mechanism 8 based on the amount of depression of the accelerator pedal 2 by the driver, but the driver uses the main switch 1 for constant speed traveling. When the vehicle is turned on to request constant speed running, the torque of the motor 21 is reduced by the electromagnetic clutch 22 even if the driver does not depress the accelerator pedal 2.
Is transmitted to the throttle valve 9, and the throttle valve 9 is opened and closed to adjust the throttle opening.

FIG. 2 is a flowchart of a constant speed traveling processing subroutine executed by the microcomputer 12 of the controller 10.

As shown in the figure, in step A3, the current vehicle speed is calculated based on the signal from the vehicle speed sensor 7. In step A5, it is determined whether the main switch 1 is on or off. If the main switch 1 is on, it is determined in step A7 whether the accelerator pedal 2 is off. If the accelerator pedal 2 is off, it is determined in step A9 whether the brake pedal 4 is off. If the brake pedal 4 is off, step A1
At 1, the constant speed traveling condition flag is set to 1. Here, the constant speed traveling condition flag being 1 means that the constant speed traveling condition is satisfied. When the constant speed traveling condition flag is 0, it means that the constant speed traveling condition is not satisfied and means that the constant speed traveling function is canceled. The constant speed traveling condition flag is set to 0 by turning on an ignition switch (not shown) at the time of starting.

On the other hand, if the result of the determination in step A5 is that the main switch 1 is off, the result of the determination in step A7 is the accelerator pedal 2 is on, and the result of the determination in step A9 is the brake pedal 4 is on, then the process proceeds to step A13. , The constant speed traveling condition flag is set to 0 because the constant speed traveling condition is not satisfied.

From step A11 and step A13 to step A15, it is determined whether the constant speed traveling condition flag is 1 or 0. If the constant speed traveling condition flag is 0, the target vehicle speed is updated to the current vehicle speed calculated in step A3 in step A17.

If the result of determination in step A15 is that the constant speed traveling condition flag is 1, the operation proceeds to step A19. In step A19, the motor duty ratio (output control amount) of the motor 21 is calculated from the target vehicle speed and the current vehicle speed to obtain the output of the motor 21. After that, the constant speed traveling condition flag is determined in step A21 in order to switch the control target. When the constant speed traveling condition flag is 1, the mode in which the vehicle is traveling at the constant speed at the updated target vehicle speed is selected. That is, the main relay 16 is turned on in step A23, the electromagnetic clutch 22 is turned on in step A25, and a control signal for driving the motor 21 is output in step A27. In step A29, a motor closing drive counter, which will be described later, is set to 0 and then the process returns to the main routine. As a result, the throttle valve 9 is controlled based on the motor 21 driven by the motor duty ratio, and the vehicle runs at a constant speed.

If the constant speed running condition flag is 0 as a result of the determination in step A21, the driver operates the accelerator pedal 2
Select the throttle control by stepping on. Specifically, first, in step A31, it is determined whether or not the motor closing drive counter is within a predetermined time. Here, the motor closing drive counter means the time during which the motor 21 is being closed. Also, the motor 21 is operated by the throttle valve 9 for a predetermined time.
It is set to the time required to drive from the fully open position to the fully closed position. If the motor closing drive counter is within the predetermined time in step A31, the motor 2 is driven in step A33.
After driving 1 to close, the motor close drive counter is updated to the sum of the motor close drive counter in step A31 and the close drive time in step A33 in step A35. Here, driving the motor 21 to close means that the throttle valve 9
Is driven in the closing direction. Then, in step A37, it is determined based on the detection signal from the potentiometer 23 whether or not the motor 21 is in the closing drive. To determine. When the closing drive counter exceeds the predetermined time, the throttle valve 9
Is driven to the fully closed region, and the cable 8c and the link mechanism 8 are set based on the depression of the accelerator pedal 2 by the driver.
The throttle valve 9 is opened and closed via the.

On the other hand, if the result of determination in step A37 is that the motor 21 cannot be closed and driven due to some failure, step A37 is performed.
At 39, the electromagnetic clutch 22 is switched off. As a result, the throttle valve 9 is driven to the fully closed region by the urging force of the return spring (not shown). As a result, the throttle valve 9 is opened / closed via the cable 8c and the link mechanism 8 based on the depression of the accelerator pedal 2 by the driver.

As shown above, once the main switch 1
When a constant speed running is requested by turning on the vehicle, the constant speed running condition flag is set to 1 and the vehicle runs at a constant speed if the conditions of turning off the accelerator padal 2 and turning off the brake pedal 4 are satisfied.

If the driver depresses the accelerator pedal 2 during constant-speed traveling, the constant-speed traveling condition is not satisfied and the constant-speed traveling function is not executed. Therefore, based on the amount of depression of the accelerator pedal 2 by the driver. Be accelerated. After that, when the accelerator pedal 2 is turned off, the constant speed traveling condition is satisfied and the constant speed traveling is executed, and the vehicle travels at the constant speed so that the vehicle speed becomes the speed at the time when the condition is satisfied.

Further, if the driver depresses the brake pedal 4 during constant speed traveling, the constant speed traveling condition is not satisfied, so the constant speed traveling function is not executed, and therefore the vehicle decelerates based on the amount of depression of the brake pedal 4. To be done. After that, when the brake pedal 4 is turned off, the constant speed traveling condition is satisfied, the constant speed traveling is executed, and the vehicle travels at the constant speed so that the vehicle speed becomes the speed at the time when the condition is satisfied.

FIG. 3 shows the constant speed running after acceleration while the main switch 1 for constant speed running is turned on.
3 is a timing chart that schematically shows a form of constant speed running after deceleration. In FIG. 3, the characteristic line E1 is the vehicle speed, the characteristic line E2 is the throttle opening, and the characteristic line E3 is the accelerator pedal 2.
Depression amount, characteristic line E4 indicates the depression of the brake pedal 4.

First, as shown by the characteristic line E3, the accelerator pedal 2 is started to be depressed from time T1.

At this time, the constant speed traveling function is canceled. Therefore, as shown by the characteristic line E2, the throttle opening of the throttle valve 9 also gradually increases from time T1. Therefore, as indicated by the characteristic line E1, the vehicle speed also gradually increases from time T1. Then, as shown by the characteristic line E3, at time T3, when the accelerator pedal 2 is depressed to zero and the accelerator is turned off, the condition is satisfied and the constant speed traveling function is restored along with the accelerator off, and the current vehicle speed at time T3 is reached. Is set as the target vehicle speed for constant speed running. That is, from time T3, vehicle speed V3 at time T3
It runs at a constant speed. At this time, the throttle opening is maintained at θ3.

When the brake pedal 4 is stepped on at time T4 as shown by the characteristic line E4 and the brake is turned on, the condition is not established and the constant speed traveling function is released, and the throttle is opened from time T4 as shown by the characteristic line E2. The degree corresponds to the accelerator depression amount, and the current vehicle speed gradually decreases from time T4 as shown by the characteristic line E1. Then, as shown by the characteristic line E4, at time T5, when the amount of depression of the brake pedal 4 is set to zero and the brake is turned off, the condition is satisfied and the constant speed traveling function is restored, and the current vehicle speed at time T5 is constant speed traveling. Is set as the target vehicle speed. That is, from time T5, the vehicle travels at the constant speed V5 at time T5. At this time, the throttle opening is maintained at θ5.

As described above, in the present embodiment, when constant speed traveling is requested by the main switch 1, the accelerator pedal is depressed to accelerate the vehicle, and the vehicle can be driven at constant speed after acceleration. Also, even if the vehicle is decelerated by operating the brake pedal, the constant speed traveling function is not completely canceled, and if the brake pedal operation amount is set to zero again, the constant speed traveling function automatically returns, After deceleration, the vehicle can run at a constant speed. Therefore, the operation amount of the driver can be reduced even on a congested road.

During constant speed running (when there is a request for constant speed running)
When the driver depresses the accelerator pedal 2, the control is switched to the control based on the operation of the accelerator pedal 2 by the driver. Therefore, when the accelerator pedal 2 is depressed during constant speed traveling (when there is a constant speed traveling request). The accelerator feel in 1 is completely the same as the accelerator feel when the accelerator pedal 2 is depressed during normal operation (when there is no demand for constant speed travel). Therefore, when the driver switches from the vehicle using this embodiment to a vehicle controlled according to the amount of depression of the accelerator pedal 2, or vice versa, the driver can feel less discomfort and discomfort in the accelerator feel. .

In addition, since the vehicle can be decelerated by the braking force by the driver simply depressing the brake pedal while traveling at a constant speed, when the vehicle is changed from a general vehicle or vice versa, It can reduce awkwardness and discomfort.

While the vehicle is traveling at a constant speed, the main switch 1 is turned off,
When the accelerator is turned on and the brake is turned on, the motor 21 is closed for a predetermined time and the throttle valve 9 is driven to the fully closed region while the electromagnetic clutch 22 is in the on state. Compared to the case where 22 is switched, the electromagnetic clutch 2
The durability of No. 2 is improved.

While the vehicle is traveling at a constant speed, the main switch 1 is turned off,
When the accelerator is turned on and the brake is turned on (when the condition is not satisfied), it is determined whether or not the motor 21 is driven to be closed,
Since the electromagnetic clutch 22 is switched off if it is not closed, it is possible to reliably drive the throttle valve 9 to the fully closed region even if there is such an abnormality.

In the present embodiment, the electromagnetic clutch 22 is kept on unless there is any abnormality when the constant speed traveling condition is not satisfied. However, if the electromagnetic clutch 22 is turned off when the main switch 1 is turned off, the main clutch The power consumption to the electromagnetic clutch 22 when the switch 1 is turned off disappears, and the power consumption becomes smaller than that in the present embodiment.

In the constant speed traveling device according to this embodiment, the torque when the motor is not energized is set to be significantly larger than the biasing force of the throttle return spring in order to downsize the motor 21 and reduce power consumption. Because
The throttle valve 9 cannot be returned to the fully closed position simply by turning off the motor drive circuit 13.

[0043]

The present invention has the following effects.

When the driver depresses the accelerator pedal during constant-speed traveling (when there is a constant-speed traveling request), the control object switching means switches to control based on the driver's operation of the accelerator pedal. The accelerator feel when the accelerator pedal is depressed during traveling (when there is a constant speed traveling request) matches the accelerator feel when the accelerator pedal is depressed during normal operation (when there is no constant speed traveling request). Therefore, when the driver switches from the vehicle using the present embodiment to a vehicle controlled according to the amount of depression of the accelerator pedal, or vice versa, the driver can be less confused and uncomfortable in the accelerator feel.

In addition, since the vehicle can be decelerated by the braking force by the driver simply depressing the brake pedal while traveling at a constant speed, the vehicle in the brake feel can be changed when the vehicle is changed from the ordinary vehicle or vice versa. It can reduce awkwardness and discomfort.

Further, when the constant speed running is switched from established to not established, the throttle opening control means does not separate the throttle valve and the throttle valve drive means, and the throttle valve drive means is driven to close so that all the throttle valves are operated. Since it is returned to the closed region and is linked with the accelerator pedal, it is not necessary to switch the state of the electromagnetic clutch mechanism when the constant speed running is switched to the non-established running. As a result, the durability of the electromagnetic clutch is improved as compared with the case where the electromagnetic clutch mechanism is turned on when the constant speed running is switched to the non-established state and the electromagnetic clutch mechanism is turned off when the constant speed running is switched from the non-established state to the established state. Remarkably improved.

Further, the throttle valve driving means is driven in the direction to drive the throttle valve in the closing direction based on the state of the throttle valve driving means detected by the driving means state detecting means when the constant speed running is switched to the non-establishment. It is determined whether or not it is being driven, and if the throttle valve driving means is not being closed, it is determined to be abnormal and the electromagnetic clutch mechanism is driven so as to separate the throttle valve and the throttle valve driving means. Even if the throttle valve drive means cannot be closed due to some abnormality when switching from the establishment of high speed travel to the establishment of non-establishment, the throttle valve urging means surely returns the throttle valve to the fully closed region, and it is possible to take measures against the abnormality. .

[Brief description of drawings]

FIG. 1 is a block diagram of a vehicle constant-speed traveling control device according to the present embodiment.

FIG. 2 is a flowchart of a constant speed traveling processing subroutine according to the present embodiment, which is executed by a microcomputer of a controller.

FIG. 3 is a time chart showing a form of constant speed running.

FIG. 4 is a claim correspondence diagram.

[Description of Reference Signs] 1 main switch (constant speed travel request means) 2 accelerator pedal 3 accelerator sensor (accelerator non-operation detecting means) 4 brake pedal 5 brake sensor (brake non-operation detecting means) 7 vehicle speed sensor (vehicle speed detecting means) 9 Throttle valve 21 Motor (throttle valve drive means) 22 Electromagnetic clutch (electromagnetic clutch mechanism) 23 Potentiometer (drive means state detection means)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical display location F02D 41/20 310 B F16D 48/06 (72) Inventor Mitsuo Yoshikawa Asahi-cho, Kariya city, Aichi prefecture 2 chome 1 Aisin Seiki Co., Ltd.

Claims (1)

[Claims] 1. A throttle valve for adjusting the intake air amount of an internal combustion engine, an accelerator pedal for mechanically driving the throttle valve, and a throttle valve urging means for urging the throttle valve in a closing direction. Vehicle speed detection means for detecting the current vehicle speed of the running vehicle, constant speed travel request means for requesting constant speed travel of the vehicle, and accelerator non-operation detection means for detecting that the driver is not operating the accelerator pedal. A brake non-operation detecting means for detecting that the driver is not operating a brake pedal, a throttle valve driving means for electrically driving the throttle valve, and a driving means state for detecting a state of the throttle valve driving means Detecting means, an electromagnetic clutch mechanism for connecting and disconnecting the throttle valve and the driving means, constant speed traveling is required, accelerator pedal is not operated, and -Confirms that the constant-speed driving condition is satisfied when the key is not operated, and otherwise determines that the constant-speed driving condition is not satisfied. When the condition is not satisfied, or when the condition is not satisfied, the condition is switched to satisfied. At the moment, the target vehicle speed updating means for updating the target vehicle speed to the current vehicle speed detected by the vehicle speed detecting means, and the target throttle opening so that the current vehicle speed matches the target vehicle speed updated by the target vehicle speed updating means. Target throttle opening degree setting means for setting, and when the condition is satisfied, the electromagnetic clutch mechanism is driven so as to connect the throttle valve and the driving means, and the actual throttle opening degree is set by the target throttle opening degree setting means. The throttle valve drive means is driven so as to match the target throttle opening that has been set; A throttle for driving the throttle valve driving means so as to drive the throttle valve to a fully closed region while driving the electromagnetic clutch mechanism so as to connect the throttle valve and the driving means, and to interlock the throttle valve with an accelerator pedal. A direction in which the throttle valve drive means drives the throttle valve to close based on the state of the opening control means and the throttle valve drive means detected by the drive means state detection means when the condition is changed from the satisfied condition to the unestablished condition. If the throttle valve drive means is not driving in the direction to drive the throttle valve closed, it is determined to be abnormal and the throttle valve and the drive means are separated from each other. A vehicle constant speed traveling control device, further comprising: an abnormality determining means for driving the electromagnetic clutch mechanism. .