JPH04176735A - Constant velocity traveling device for vehicle - Google Patents

Abstract

PURPOSE:To enable control in response to requirements of operator on driving even at the time of curve running by providing another release means for releasing constant speed control of vehicle speed conducted by a constant speed control means when a detected steering angle is over a set level. CONSTITUTION:A controller 3 composes with its control another release means 12 for forcedly releasing constant speed control of vehicle speed when a steering angle detected by a steering sensor 10 is over a set steering angle level corresponding to a vehicle speed value at that time, at the time of constant speed control by a control speed control means 6. In the case that a driver carries out steering over a steering angle value to be required in correspondence with a vehicle speed value at that time to meet with e.g. a curve of a road when the driver carries out constant speed control to meet with a target speed value set by using a set switch 2, the constant speed control of the vehicle speed is released, so that the driver can control his car with his operation to have operability meeting with his requirements.

Description

[Detailed description of the invention] (Industrial application field) TECHNICAL FIELD The present invention relates to an improvement of a constant speed traveling device for a vehicle.

(Prior art) Conventionally, as a constant speed traveling device for a vehicle, for example,
As disclosed in Publication No. 1-285138, when the vehicle speed is being controlled at a constant speed value set by the driver, depression of the brake pedal is detected, and when the brake pedal is depressed, the vehicle speed is A device that forcibly cancels constant speed control is known. Also known are systems that detect the depression of a clutch pedal to cancel constant speed control, or detect the operation of a deceleration switch and change to deceleration control.

(Problem to be Solved by the Invention) However, with the above-mentioned conventional device, when the driver operates the steering wheel according to the curvature of the road, for example, when driving at high speed on the expressway, the driver must apply force... Even though the driver wants to decelerate when driving at a constant speed, unless the brake or clutch pedal described above or the deceleration switch is operated, the vehicle will continue to travel at a constant speed, so the control will not respond to the driver's driving requests. There are drawbacks.

The present invention has been made in view of the above, and an object of the present invention is to enable control that meets the driver's driving requirements even when traveling on a curve in a constant speed traveling device such as the one described above.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, the steering angle of the vehicle is taken into consideration in controlling the vehicle speed.

In other words, the invention according to claim (1) is provided with a constant speed traveling device for a vehicle as described above, that is, a constant speed control means for controlling a vehicle speed to a set vehicle speed, and a brake operation that detects a depression operation of a brake pedal. It is assumed that the vehicle is equipped with a detection means and a release means for canceling the constant speed control of the vehicle speed by the constant speed control means when the brake pedal is depressed as detected by the brake operation detection means. and a steering angle detection means for detecting a steering angle of the vehicle, and another means for canceling constant speed control of the vehicle speed by the constant speed control means when the steering angle detected by the steering angle detection means is equal to or greater than a set steering angle. The configuration includes a release means.

In addition, in the invention set forth in claim (2), instead of the above-mentioned other release means, when the steering angle detected by the steering angle detection means is equal to or greater than the set steering angle, the constant speed control means performs constant speed control of the vehicle speed. Control change means for changing to deceleration control is provided.

Furthermore, in the invention described in claim (3), the above-mentioned claim (1)
) In addition to the structure of the invention described in ), when the steering angle detected by the steering angle detection means returns to less than the set steering angle after the constant speed control is canceled or during the vehicle speed deceleration control, the constant speed control of the vehicle speed is performed. A control return means is provided to restore the control.

(Function) With the above configuration, in the present invention, when the driver operates the steering wheel at a steering angle greater than or equal to the set steering angle, for example when driving around a curve, constant speed control of the vehicle speed is forcibly canceled or changed to deceleration control. The operation complies with the request of the driver to reduce speed.

In particular, if the constant speed control of the vehicle speed is restored when the steering angle returns to less than the set steering angle after canceling constant speed control or changing to deceleration control, the driver can set constant speed control again. This eliminates the need for additional operations, improving operability.

(Effects of the Invention) As explained above, according to the constant speed traveling device for a vehicle of the present invention, since the steering angle is taken into account in the constant speed control of the vehicle speed, the driver can It is possible to reduce the speed according to the request of the driver, thereby improving drivability.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 shows a block diagram of the constant speed running device of a vehicle with a manual transmission. 1 is the main switch of the constant speed running device, and 2 is used to set the vehicle speed value at which the driver desires constant speed driving. 3 is a controller for constant speed control equipped with a CPU, etc. inside.

The controller 3 is connected to a vehicle speed sensor 4 that detects the vehicle speed and a motor 5 composed of a stepping motor or the like that controls the opening degree of the throttle valve of the engine, and the actual vehicle speed detected by the vehicle speed sensor 4 is By driving the motor 5 to control the opening of the throttle/nottle valve so as to reach the target vehicle speed set by the set switch 2, and adjusting the increase/decrease of the engine output, the vehicle speed is controlled at a constant speed to the set vehicle speed. It has a function as constant speed control means 6.

Further, in FIG. 1, 8 is a brake switch as a brake operation detection means that closes when the brake pedal of the vehicle is depressed and detects the depression operation of the brake pedal, and 9 is closed when the clutch pedal of the manual transmission is depressed. The clutch switch 10 is a steering angle sensor as a steering angle detection means for detecting the steering angle of the vehicle,
Detection signals from the switches and sensors 8 to 10 are input to the controller 3. The controller 3 is
Function as a release means 11 for releasing the constant speed control of the vehicle by the constant speed control means 6 when the depression operation of the brake or clutch pedal is detected by each of the brake and clutch switches 8 and 9. It also has

The controller 3, as shown in FIG.
During constant speed control of the vehicle speed, it has a function of canceling the constant speed control of the vehicle speed or shifting to deceleration control according to the steering angle detected by the steering angle sensor 10 and the actual vehicle speed.

That is, in FIG. 2, the steering angle value θ0 for canceling the constant speed control of the vehicle speed is set according to the vehicle speed.

This steering angle value θO gradually becomes smaller as the vehicle speed increases. In a region where the steering angle is greater than or equal to the steering angle value 00 (region indicated by ■ in the figure), constant speed control of the vehicle speed is forcibly canceled. In addition, the area where the steering angle value is less than 00 and the minute steering angle value (10°) or more (the area marked with a broken line indicated by ■ in the figure) is an area where vehicle speed control is changed from constant speed control to deceleration control. . Then, when the steering angle returns to less than 10 degrees from this region (3), the deceleration control is changed to constant speed control again. Note that a region where the vehicle speed is less than a low vehicle speed (40 b/h) is a region where constant speed control of the vehicle speed is not possible.

Therefore, under the control of the controller 3 based on FIG. 2, when the constant speed control means 6 is controlling the vehicle speed, the steering angle detected by the steering angle sensor 10 is set to the set steering angle according to the vehicle speed value at that time. Another canceling means 12 is configured to forcibly cancel the constant speed control of the vehicle speed when the vehicle speed exceeds 00 and enters the region (3).

Furthermore, when the steering angle detected by the steering angle sensor 10 exceeds the set steering angle (10°) and enters the region (2) under the control of the controller 3 based on FIG. 2, the constant speed control means 6 It constitutes a control changing means 13 that changes constant speed control of the vehicle speed to deceleration control, and when the steering angle returns to less than the set steering angle of 10 degrees during this deceleration control, the constant speed control of the vehicle speed is changed again. It constitutes a control return means 14 that allows the return to return.

Therefore, in the above embodiment, when the driver is performing constant speed control to the target vehicle speed value set using the set switch 2, the driver adjusts the steering wheel to the current vehicle speed value, for example, in accordance with a curve in the road. Correspondingly, when the driver operates the steering angle to a value greater than 00 determined from Figure 2, the vehicle enters the region (■) in Figure 2, and the constant speed control of the vehicle speed is forcibly cancelled, so the driver can control his/her own operation. As a result, the vehicle can be controlled freely and drivability that meets the driver's requirements can be obtained.

In addition, when the steering angle is operated to exceed the small steering angle value (10°) and enters the region (■) in Fig. 2 while driving on a curve, constant speed control is changed to vehicle speed deceleration control, so when driving The control is adapted to the driver's deceleration request, ensuring good drivability.

Moreover, during the above deceleration control, when the steering angle returns to less than the minute steering angle value (10°), after increasing the speed,
Since constant speed control of the vehicle speed is started again, the driver can continue driving at the original constant speed without requiring any operation.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a block diagram of a constant speed traveling device, and FIG. 2 is an explanatory diagram of an area where constant speed control is canceled and changed based on the steering angle. 2... Controller, 6... Constant speed control means, 8...
・Brake switch (brake operation detection means), 10・
... Rudder angle sensor (rudder angle detection means), 11 ... Release means, 12 ... Other release means, 13 ... Control change means,
14... Control return means.

Claims (3)

[Claims] (1) A constant speed control means for constant speed control of the vehicle speed to a set vehicle speed, a brake operation detection means for detecting a depression operation of the brake pedal, and a brake operation detection means for detecting the depression operation of the brake pedal detected by the brake operation detection means, In a constant speed traveling device for a vehicle, the device includes a canceling means for canceling constant speed control of the vehicle speed by the speed controlling means, a steering angle detecting means for detecting a steering angle of the vehicle, and a steering wheel detected by the steering angle detecting means. A constant speed traveling device for a vehicle, comprising another canceling means for canceling the constant speed control of the vehicle speed by the constant speed control means when the angle is equal to or greater than a set steering angle. (2) In the constant speed traveling device for a vehicle according to claim (1), instead of using other release means, when the steering angle detected by the steering angle detection means is equal to or greater than the set steering angle, the constant speed control means controls the vehicle speed. A constant speed traveling device for a vehicle, comprising a control changing means for changing constant speed control to deceleration control. (3) In the constant speed traveling device for a vehicle according to claim (1) or claim (2), after the constant speed control is canceled or during vehicle speed deceleration control, the steering angle detected by the steering angle detection means is set. A constant speed traveling device for a vehicle, comprising a control return means for returning the vehicle speed to constant speed control when the steering angle returns to less than the steering angle.