JPH0288329A - Automobile travel control device - Google Patents

Abstract

PURPOSE:To assure safety in case of faults of a sensor or an actuator by closing a throttle valve when the opening of the throttle valve reaches the maximum value in slow driving or when the slipping of a driving a wheel is detected, and by cancelling constant speed driving control by means of the closing of the throttle valve when a brake panel is used in a constant speed driving mode. CONSTITUTION:When there is a fault in a car speed sensor 8 in a slow driving mode and the speed far slower than the actual car speed is output, the excessive opening of a throttle valve 6 over the maximum value is prevented, while if there is a fault in a controller 11 and the throttle valve 6 is opened to an extraordinary level, the throttle valve 6 is restored to its totally enclosed position by a limiter 21. Based on the signals from a sensor for the space between cars 9 and from an obstacle sensor 20, the alarm is given by an alarm display device 10. Further, when the slipping of a driving wheel is detected by a sensor, the throttle valve 6 is closed by the controller 11. Through the actuation of a brake switch 27 in a constant speed driving mode, feeding to a throttle actuator 5 is shut off, and a constant speed driving mode is thus cancelled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] [Prior Art] FIG. A speed driving mode setting switch 1, an accelerator depression amount sensor 12 that detects the amount of depression of the accelerator pedal 3,
Brake control device 18 that controls brakes (not shown)
, a throttle actuator 5 that drives the throttle valve 6 of the engine 7, an inter-vehicle distance sensor 9 that detects the inter-vehicle distance of the preceding vehicle, and an M? I
It is composed of a controller 11 that performs the following operations.

As shown in FIG. 5, the controller 11 includes, in addition to the above, a select lever position sensor 13 and an engine rotation sensor 1.
4. Signals from sensors such as a vehicle speed sensor 8, a turn signal switch 15, a throttle opening sensor 16, and an accelerator switch 17 are also input.

Note that 2 is a slow running mode release switch, and 10 is an alarm display device, both of which are connected to the controller 11.

Next, the operation will be explained. When the slow running mode is set with the slow running mode setting switch 1 shown in FIG.
The controller 11 reads a signal from an accelerator depression sensor 12 that detects the depression amount of the accelerator pedal 3, outputs a signal to the throttle actuator 5, controls the opening and closing of the throttle valve 6, and controls the output of the engine 7.

This does not open the throttle valve 6 in proportion to the amount of depression of the accelerator pedal 3, but opens and closes the throttle valve 6 so that the speed is below a certain level, regardless of the amount of depression of the accelerator pedal 3.

When the accelerator pedal 3 is released, the throttle valve 6 is closed, the brake control device 18 is activated, and the vehicle is stopped.

In addition, since the car runs at a speed below a certain level by operating only the accelerator pedal 3, the car continues to drive at a slow speed during traffic jams (sometimes convenient).

Further, there is a distance sensor 9 for detecting a preceding vehicle, and when a preceding vehicle is detected within a predetermined distance fdjJl- in front, the brakes are automatically applied to stop the vehicle. At the same time, a buzzer as the alarm display device 10 is sounded.

This slow running mode is canceled by pressing the slow running mode release switch 2 or by activating the turn signal switch 15 to issue a turn signal signal.

[Problem to be solved by the invention]

Since the conventional vehicle running control device is configured as described above, it is necessary to balance and control both the throttle valve 6 and the brake when the vehicle is running, which results in an increase in the size of the device.

Further, there were other problems such as failure of the sensor or throttle actuator 5 among these devices not being taken into account.

The first invention was made in order to solve the above-mentioned problems, and provides a driving control device for an automobile that is simple and has sufficient functions, and that can maintain safety even in the event of failure of major sensors or actuators. The purpose is to obtain.

In addition to the above object, the second invention is such that even if there is an abnormality in the throttle valve due to an abnormality in the controller or the like during constant speed driving, the constant speed driving mode can be canceled by stepping on the brake pedal. The object of the present invention is to obtain a vehicle travel control device that can ensure safety even in abnormal situations.

A throttle actuator that is controlled by a roller and drives the throttle valve, a sensor that detects drive wheel slip, and a limiter that cuts off power supply to the throttle actuator when the throttle valve opening reaches a set upper limit in slow speed driving mode. It has been established that

Further, the vehicle driving side vsv device according to the second invention includes:
A throttle actuator that is controlled by a controller and drives the throttle valve, a sensor that detects slippage of the driving wheels, a limiter that cuts off power supply to the throttle actuator when the throttle opening reaches the upper limit, and a limiter that cuts off power supply to the throttle actuator when the throttle opening reaches the upper limit, and when the brake pedal is pressed during constant speed driving mode. A brake switch is provided to cut off power supply to the throttle actuator and cancel constant speed driving mode.

[For production]

In the first invention, the throttle actuator is controlled by the controller to control the opening and closing of the throttle valve, and when the vehicle is traveling at a slow speed, the vehicle travels at a predetermined speed.
By stepping on the brake pedal, the speed during slow driving is controlled, and when the throttle valve opening reaches the set upper limit, the limiter cuts off the power supply to the throttle actuator, closes the throttle valve, and reduces engine output. It acts to prevent runaway by reducing the engine speed, and also closes the throttle valve when slippage of the drive wheels is detected.

In the second invention, the throttle actuator is controlled by the controller to control the opening and closing of the throttle valve, and in the slow running mode, the slow running is performed at a predetermined speed, and by depressing the brake pedal, the slow running is performed. When the throttle valve reaches the set upper limit,
The limiter operates to cut off the power supply to the throttle actuator, close the throttle valve, and reduce engine output to prevent runaway, and also controls the throttle actuator to maintain the vehicle speed stored in the controller during constant speed driving mode. to control the opening and closing of the throttle valve,
When you press the brake pedal, the brake inch is activated,
The power supply to the throttle actuator is cut off, the throttle valve is closed, and constant speed driving control is canceled, and the throttle valve is also closed when slippage of the drive wheels is detected.

(Example) Hereinafter, an example of the present invention will be explained with reference to the drawings.
The figure is a block diagram showing the configuration of one embodiment.

In FIG. 1, parts that are the same as those in FIG. 5 are given the same reference numerals to avoid redundant explanation of the structure, and mainly the parts different from those in FIG. 5 will be described.

In this FIG. 1, numerals 1 to 3, 5 to 12, and 16 are the same as in FIG. I'm trying to send it out.

Further, 20 is an obstacle sensor that detects an obstacle and sends its detection output to the controller 11. The obstacle sensor 20 and inter-vehicle distance sensor 9 are designed to double prevent rear-end collisions or collisions.

Further, although not shown, a sensor for detecting slippage of the drive wheels is provided, and when this sensor detects slippage of the drive wheels, its detection output is sent to the controller 11.
It is now sent to . When this detection output is input to the controller 11, the throttle actuator 5 is controlled to close the throttle valve 6 and reduce the output of the engine 7.

Note that the accelerator switch 17, select lever position sensor 13, turn signal switch 15,
Illustration of the engine rotation sensor 14 is omitted.

FIG. 2 is a plan view showing the configuration of the throttle actuator 5, and the throttle actuator 5 is of a differential gear type.

24 is the first gear, 25, 26 are the second gears, respectively.
This is the third gear. The first gear 24 and the third gear 26 are in mesh with each other, and the third gear 26 and the second gear 25 are in mesh with each other.

A pulley 28 is attached to the drive shaft of the first gear 24, and this pulley 28 is connected to the accelerator pedal 3 (FIG. 1) via a cable 29.

The second gear 25 is driven by the motor 22, and the throttle valve 6 is connected to the drive shaft of the third gear 26.

Thereby, the driving forces of the accelerator pedal 3 and the motor 22 are applied to the throttle valve 6 in parallel. The throttle opening of the throttle valve 6 is detected by the throttle opening sensor 16, as already described in FIG.

A cam 22a is attached to the rotating shaft of the motor 22. A limiter 21 is disposed opposite to the cam 22a, and the limiter 21 is activated when the cam rotates to a predetermined upper limit position of the throttle opening. When this limiter 21 is activated, power supply to the motor 22 is cut off.

When the power supply to the motor 22 is cut off, the throttle valve 6 returns to the fully closed position, and as a result, the engine 7
output is reduced.

Further, 23 is an automatic relay, and power to the motor 22 is supplied from the controller 11 through this relay 23. Note that cutting off the power supply to the motor 22 is also performed by the slow running mode release switch 2.

Next, we will explain the operation.0 During normal driving, the driver controls the output of the engine 7 by operating the accelerator pedal 3, but when driving in traffic jams, etc., the driver may drive at a low speed or stop. is repeated.

Therefore, when the driver presses the slow-speed driving mode setting switch 1, the controller 11 detects the signal, sets the slow-speed driving mode, and notifies the driver of this on the warning display device 10.

In this slow driving mode, the driver presses the brake pedal 3.
If the foot is off, the controller 11 determines from the signal from the brake depression amount sensor 4 and feeds back the signal from the vehicle speed sensor 8 to maintain a predetermined constant speed, for example, 10 to 15 km/h. Controls the opening degree of the throttle valve 6. Therefore, this speed is maintained at a constant speed regardless of the slope or the size of the load.

When you want to increase the speed, you just need to step on the accelerator pedal 3, and when you want to reduce the speed, when you step on the brake pedal 4a, the brakes are applied mechanically, and the controller 11 detects the amount of depression of the brake pedal 4a. Then, the throttle actuator 5 is driven in a direction to close the throttle valve 6, thereby reducing the output of the engine 7.

Furthermore, if the brake pedal 4a is depressed, the throttle valve 6
is completely closed, and at the same time the brakes are applied to stop the car.

Therefore, in the slow running mode, the vehicle speed can be controlled from a certain constant speed to a stop by operating one brake pedal 4a, reducing the burden on the driver.

However, if the vehicle speed sensor 8 has a malfunction and outputs a vehicle speed that is significantly lower than the actual vehicle speed, the controller 11 will abnormally open the throttle valve 6 to maintain the predetermined vehicle speed, causing the vehicle to speed up. Put it away.

To prevent this, a throttle opening sensor 16 is provided to prevent the throttle valve 6 from opening beyond a certain upper limit value of the throttle opening.

It is also possible that the controller 11 itself has a problem and issues a command to open the throttle valve 6 abnormally.

In order to prevent the throttle valve 6 from opening abnormally even in such a situation, a limiter 21 is provided on the throttle actuator 5 as shown in FIG. 2. This limiter 2
1, the power to the motor 22 is turned off, the throttle valve 6 is returned to the fully closed position, and the output of the engine 7 is reduced.

In the throttle actuator 5, the driving force of the rotor 22 is transferred to the second throttle actuator 5. The throttle valve 6 is driven via the third gear 25, 26, and the throttle is actuated via the cable 29, the pulley 28, the first gear 24, and the third gear 26 depending on the amount of depression of the accelerator pedal 3. Valve 6 is activated.

That is, the driving forces of the accelerator pedal 3 and the motor 22 are applied to the throttle valve 6 in parallel. Power to the motor 22 is given through a relay 23, and the motor 23
It is also turned off by the slow running mode release switch 2.

Furthermore, this embodiment is equipped with an inter-vehicle distance sensor 9 and an obstacle sensor 20, and when the inter-vehicle distance becomes smaller than a certain predetermined value or when an obstacle is detected, the controller 11 sends an alarm to the alarm display device 10. output and issue an alarm.

In this case, if a problem occurs in the inter-vehicle distance sensor 9, it is possible that a rear-end collision with the preceding vehicle may occur, so a dual system consisting of the inter-vehicle distance sensor 9 and the obstacle sensor 20 is used to prevent rear-end collisions or collisions with obstacles or the preceding vehicle. A fail-safe system is implemented to prevent double damage.

Similarly, it is better to use a dual system for the warning display device IO. For example, the inter-vehicle distance sensor 9 uses an optical method, which can measure relatively accurate distances, but the field of view is narrow, so the other obstacle sensor 20 , it is better to use ultrasonic waves to detect obstacles over a wide range.

There are two possible types of alarm display device 10: sound and light. It is better for the light to blink, and controller 1
1 is also possible, so the alarm display device 10 has the following:
The route passing through the controller 11 and the alarm display device 10 directly
It is better to provide two routes for activating.

Further, when the sensor detecting the slip of the drive wheel detects the slip of the drive wheel, the controller 11 controls the throttle actuator 5 to close the throttle valve 6, and as a result, the output of the engine 7 is reduced.

That is, when the accelerator pedal 3 is depressed, the throttle actuator 5 operates via the cable 29, the pulley 28, the first gear 24, and the third gear 26 so that the throttle valve 6, which was previously opened, is closed.

FIG. 3 is a block diagram showing the configuration of a second embodiment of the present invention. In FIG. 3, the same parts as in FIG. 1 are given the same reference numerals, and the parts different from FIG. State it to the subject.

As is clear from comparing this Fig. 3 with Fig. 1, the parts indicated by numerals 1 to 12, 16, and 20 are the same as those in Fig. 3. The illustration of the sensor for detection is omitted. The part indicated by 19.27 is newly added to the configuration of FIG.

That is, 19 is a constant speed driving mode setting switch,
It is connected to the controller 11. When the constant speed driving mode is set by the constant speed driving mode setting switch 19, the controller 11 stores the vehicle speed at the time of setting.

Further, 27 is a brake switch, which detects the amount of depression of the brake pedal 4a and sends the detected output to the controller 11.

When this brake switch 27 is activated, the power supply to the throttle actuator 5 is cut off, and the constant speed driving mode is canceled.

FIG. 4 is a plan view showing the configuration of the actuator 5 in the embodiment shown in FIG. 3. Also in FIG. 4, the same parts as in FIG.
Only the configuration of the parts different from those shown in the figure will be explained.

In FIG. 4, the placket inch 27 is added to the configuration shown in FIG. 2, and inserted at the connection point between the relay 23 and limiter 21 and the power source.

Other parts are the same as in FIG.

By connecting the placket inch 27 to the throttle actuator 5 in this way, power is supplied to the motor 22 through the relay 23, and the limiter 2
1 and the slow running mode release switch 2, and the circuit of the brake switch 27 and the slow running mode switch 27 are included in both rows, and these circuits cut off the power supply to the motor 22. .

Next, the operation of the embodiment shown in FIGS. 3 and 4 will be explained. In normal driving, the driver controls the engine output by manipulating the accelerator pedal 3, but when driving in traffic jams, In such cases, driving at low speed,
It stops and repeats.

Therefore, when the driver presses the slow-speed driving mode setting switch 1, the controller 11 detects the signal and sets the slow-speed driving mode.
Let me know that.

If the driver takes his foot off the brake pedal 4a,
The controller 11 determines from the signal of the brake depression amount sensor 4 and sets a predetermined constant speed, for example lO~1.
The opening degree of the throttle valve 6 is controlled by feeding back the signal from the vehicle speed sensor 8 so that the speed is 5 km/h. Therefore, this speed is maintained at a constant speed regardless of the slope or the size of the load.

When you want to increase the speed, just press the accelerator pedal 3. When you want to decrease the speed, press the brake pedal 4a to mechanically apply the brakes, and the controller 11 detects the amount of depression of the brake pedal 4a and controls the throttle valve. The output of the engine 7 is reduced by driving the throttle actuator 5 in the direction of closing the throttle actuator 6 .

Furthermore, if the brake pedal 4a is depressed, the throttle valve 6
is completely closed, and at the same time the brakes are applied to stop the car.

Therefore, in the slow running mode, the vehicle speed can be controlled from a certain constant speed to a stop by operating one brake pedal 4a, reducing the burden on the driver.

However, if the vehicle speed sensor 8 has a malfunction and outputs a vehicle speed that is significantly lower than the actual vehicle speed, the controller 11 will abnormally open the throttle valve 6 to maintain the predetermined vehicle speed, causing the vehicle to speed up. To prevent this, there is a throttle opening sensor 16.
The throttle valve is prevented from opening beyond a certain upper limit value of the throttle opening.

It is also possible that the controller 11 itself has a problem and issues a command to open the throttle valve 6 abnormally.

Even if this happens, to prevent the throttle valve 6 from opening abnormally, turn off the power to the motor 22 using the limiter 21 shown in the throttle actuator 5 in FIG. 4, and return the throttle valve 6 to the fully closed position. , reducing engine power.

The throttle actuator 5 in the example of FIG. 4 is of the differential gear type as in the case of FIG. 2, and the driving force of the accelerator pedal 3 and the motor 22 is applied to the throttle valve 6 in parallel. The operation up to 0 or more is similar to the embodiments shown in FIGS. 1 and 2.

Power to the motor 22 is supplied through a relay 23, and a circuit that is turned off by the limiter 21 and the slow running mode release switch 2 and a circuit that is turned off by the brake switch 27 and the slow running mode release switch 2 are connected in parallel. ing.

Next, the operation of the throttle actuator 5 shown in FIG. 4 will be explained. Power is supplied to the throttle actuator 5 through the slow running mode release switch 2 and the limiter 21 at the same time as the power key (not shown) is turned on, but the throttle actuator 5 hardly moves during normal running.

When the drive wheels slip on a slippery road surface such as a frozen road, the controller 11 drives the throttle valve 6 in the closing direction in order to reduce the output of the engine 7.

Further, when the slow running mode is set by the slow running mode setting switch l, the throttle valve 6 is controlled to be opened by the amount of depression of the brake pedal 4a, but it cannot be opened beyond the limiter 21. do not have.

Therefore, if the vehicle speed sensor 8 is malfunctioning or the controller 1
If the throttle valve 6 tries to open abnormally due to the problem in 1, the limiter 21 will cause the throttle actuator 5 (
That is, the power of the motor 22) is turned off.

In addition, in the constant speed driving mode, the constant speed driving mode is set by the constant speed driving mode switch 19, and the power to the throttle actuator 5 is connected to a circuit that passes through the slow speed driving mode release switch 2, the limiter 21, and the slow speed driving mode switch 19. A circuit passing through the brake switch 27 and the fast running mode release switch 2 are connected in parallel and supplied.

Therefore, during normal constant speed driving mode operation, motor 2
Even if the throttle valve 2 exceeds the limiter 21 and is driven to open the throttle valve 6, the circuit passing through the brake switch 27 is closed, so there is no problem in operation.

If the throttle valve 6 opens abnormally due to a malfunction in the vehicle speed sensor 8 or controller 11, the circuit of the limiter 21 is open but the circuit of the wall brake switch 27 is closed. pedal 4
When step a is pressed, the brake switch 27 is turned off, the power to the throttle actuator 5 is cut off, the throttle valve 6 is returned to its reference position, the constant speed driving mode is canceled, and the output of the engine 7 is reduced.

That is, when the constant speed driving mode is set, the controller 11 stores the vehicle speed when the constant speed driving mode was set, and controls the throttle actuator 5 to open and close the throttle valve 6 to maintain that speed. Adjust the output of engine 7.

At this time, if the driver takes his foot off the accelerator pedal 3, the car will run at a constant speed, and if he depresses the brake pedal 4a, it will be released and the throttle valve 6 will close.
The output of engine 7 decreases.

In the constant speed driving mode, the throttle valve 6 moves from fully closed to fully open, so it is not possible to provide a limiter 21 as in the slow speed driving mode.Therefore, a brake inch 27 is provided on the brake pedal 4a, and the throttle valve 6 moves from fully closed to fully open. In this case, the circuit is configured to supply power to the throttle actuator 5 through the brake switch 27.

By doing this, it is possible to cancel the constant speed driving mode by stepping on the brake pedal 4a, and even if the controller 11 malfunctions and the throttle valve opens abnormally, the driver will not feel danger. When you step on the brake, the constant speed driving function is canceled.

On the other hand, drive wheel slip control is a control in which when slip of the drive wheels is detected, the throttle actuator 5 is driven in the direction of closing the throttle valve 6 to reduce the output of the engine 7. By supplying power to the throttle actuator 5 through the limiter 21 as in the slow speed driving mode, the controller 11
Even if there is a problem with the throttle valve 6 and the throttle valve 6 is driven in the opening direction, the limiter 21 turns off the power and the engine will not run out of control.

Note that in the embodiments shown in FIGS. 3 and 4, the above-mentioned FIGS.
Similar to the embodiment shown in FIG. 2, it is equipped with an inter-vehicle distance sensor 9 and an obstacle sensor 20, and when the inter-vehicle distance becomes smaller than a certain predetermined value or when an obstacle is detected, a controller 11
to the alarm display device 10, and this alarm display device 1
However, if a problem occurs in the inter-vehicle distance sensor 9, a rear-end collision may occur, so a dual system is used for rear-end collision and collision prevention using the inter-vehicle distance sensor 9 and the obstacle sensor 20.

Similarly, it is preferable that the warning display device 10 is also a dual system.For example, in the same way as the embodiments shown in FIGS. However, since the field of view is narrow, it is preferable for the other obstacle sensor 20 to detect obstacles over a wide range using ultrasonic waves.

Alarm display device! There are two possible types of 110: sound and light. It is better for the light to blink.Also, since it is possible that the controller 11 is malfunctioning, it is better to provide the alarm display device 10 with two routes: one that passes through the controller 11 and one that directly activates the alarm display device 10. .

(Effects of the Invention) According to the first invention, the opening of the throttle valve is monitored in the slow running mode, and when the opening of the throttle valve reaches a predetermined upper limit, Since the limiter is configured to cut off power to the throttle actuator, it is possible to prevent runaway even if there is a problem with the vehicle speed sensor or controller, thereby ensuring safety.

In addition, when slipping of the drive wheels is detected, the controller closes the throttle valve to reduce engine output, and is equipped with multiple inter-vehicle distance sensors and multiple obstacle sensors, so that when the inter-vehicle short distance falls below a predetermined value, Or, the system is configured to generate a warning when an obstacle is detected to provide a double fail-safe against rear-end collisions or collisions, so safety can be improved with a relatively simple configuration and easy driving is possible. There is a certain effect.

Furthermore, according to the second invention, in the slow speed driving mode, when the opening degree of the throttle valve 7) reaches a predetermined upper limit, the limiter cuts off the power to the throttle actuator, and in the constant speed driving mode, the throttle actuator is turned off. Since the brake switch is configured to turn off the power to the throttle actuator and close the throttle valve to cancel constant speed driving mode, constant speed driving can be canceled even if there is an abnormality in the throttle valve due to a controller failure. This has the effect of ensuring safety.

In addition, as in the first invention, a plurality of inter-vehicle distance sensors and obstacle sensors are provided to provide a double fail-safe against rear-end collisions or collisions, so safety can be improved with a relatively simple structure. This has the effect of making easy driving possible.

In addition, similar to the first invention, when a slip of the drive wheels is detected, the controller closes the throttle valve and reduces the engine output, so safety can be ensured from this point of view as well. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a vehicle travel control device according to an embodiment of the present invention, FIG. 2 is a plan view of a throttle actuator in the same embodiment, and FIG. 3 is a diagram showing a vehicle according to another embodiment of the present invention. FIG. 4 is a plan view of a throttle actuator in another embodiment of the same, and FIG. 5 is a block diagram showing the configuration of a conventional vehicle cruise control device. l... Slow running mode setting switch, 2... Slow running mode release switch, 4... Brake depression amount sensor, 5... Throttle actuator, 6... Throttle valve, 8... Vehicle speed Sensor, 9... Inter-vehicle distance sensor, 11... Controller, 16... Throttle opening sensor, 19... Constant speed driving mode setting switch,
20... Obstacle sensor, 21... Limiter, 27...
...Brake switch. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Figure 1

Claims (2)

[Claims] (1) A slow running mode setting switch that sets the slow running mode, a brake pedal depression amount sensor that detects the amount of depression of the brake pedal, a sensor that detects the slip of the driving wheels, and a throttle actuator that drives the throttle valve. , a plurality of inter-vehicle distance sensors for detecting the inter-vehicle distance, a plurality of obstacle sensors for detecting obstacles, a throttle opening sensor for detecting the opening of the throttle valve, and a throttle opening sensor for detecting the opening of the throttle valve in the slow driving mode. A limiter that cuts off power supply to the throttle actuator when a set upper limit is reached; and a limiter that controls the throttle actuator so that when the slow speed driving mode is set, the vehicle speed is controlled from a predetermined vehicle speed to a stop by operating a brake. When the slip of the drive wheel is detected, the throttle actuator closes the throttle valve, and an alarm signal is output when the detected inter-vehicle distance of the inter-vehicle distance sensor is less than a predetermined value or when the obstacle sensor detects an obstacle. An automobile travel control device equipped with a controller. (2) A slow-speed driving mode setting switch that sets the slow-speed driving mode, a constant-speed driving mode setting switch that sets the constant-speed driving mode, a brake depression amount sensor that detects the amount of depression of the brake pedal, and a brake pedal depression amount sensor that detects the amount of depression of the brake pedal. A sensor for detecting slip, a throttle actuator for driving a throttle valve, a plurality of inter-vehicle distance sensors for detecting inter-vehicle distance, a plurality of obstacle sensors for detecting obstacles, and detecting the throttle opening of the throttle valve. A throttle opening sensor, a limiter that cuts off power supply to the throttle actuator when the throttle opening reaches a set upper limit in the slow speed driving mode, and a limiter that cuts off power supply to the throttle actuator when the brake pedal is depressed in the constant speed driving mode. A brake switch that cuts off power supply to the driver and cancels the constant speed driving mode, and controls the throttle actuator so that when the slow speed driving mode is set, the vehicle speed is controlled from a predetermined speed to a stop by operating the brake. In the constant speed driving mode, the throttle actuator is controlled to open and close the throttle valve so as to maintain the memorized vehicle speed, and when the slip of the drive wheel is detected, the throttle actuator is caused to close the throttle valve, and A driving control device for an automobile, comprising: a controller that outputs an alarm signal when a detected inter-vehicle distance by an inter-vehicle distance sensor is less than a predetermined value or when the obstacle sensor detects an obstacle.