JPH07329601A - Constant-speed travel control device for vehicle - Google Patents

Abstract

PURPOSE:To improve the feeling of acceleration at the time of increasing a speed by providing a speed increasing setting means for adding a predetermined speed increasing value to a large value out of an actual travel speed and a target speed to change the target speed when a speed increasing command signal is generated from a signal generating means. CONSTITUTION:When a resume acceleration switch 4 is operated, an actual travel speed is compared with a target speed stored in a RAM and a predetermined speed increasing value (Vkm/h) is added to the larger one of them and the sum is stored in the RAM as a target speed. When the resume acceleration switch is continuously operated, the target speed is gradually increased as time elapses and therefore, a very small fixed value alpha (km/h) is added to the target speed stored in the RAM to renew the target speed. Since this processing is performed during a period of time when the resume acceleration switch 4 is operated, the fixed value alpha (km/h) is continuously added to the target speed and a vehicle is accelerated with the addition and renewal of the target speed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle constant-speed traveling control device for controlling a speed adjusting element so that an actual traveling speed of a vehicle coincides with a target speed. The present invention relates to a vehicle constant-speed traveling control device that is configured to perform speed increase well.

[0002]

2. Description of the Related Art Conventionally, as a device of this type, a constant speed is controlled by controlling a speed adjusting element (for example, an actuator for adjusting the opening of a throttle valve) so that the actual traveling speed of a vehicle coincides with a target speed. Various types of vehicles have been proposed. In these cases, for example, as shown in Japanese Patent Publication No. 3-76247, when a speed is increased during constant speed traveling by operating a resume switch or the like, a predetermined acceleration value is added to the actual traveling speed. Then, the target speed is changed and the acceleration control is performed.

[0003]

However, when the acceleration control is started when the actual traveling speed is much lower than the target speed such as when traveling uphill, the target speed is increased from the actual traveling speed by a predetermined speed. Since the value is set to a value obtained by adding the values, the newly set target speed may be lower than the target speed before the start of the acceleration control. In such a case, the vehicle speed once drops at the start of the speed increase control, and then the vehicle speed increases at a constant acceleration. As a result, the acceleration feeling is poor, such as a response delay, an insufficient feeling of speed increase, or deceleration despite the speed increase control.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the acceleration feeling during acceleration.

[0005]

In order to achieve the above-mentioned object, the present invention provides a speed detecting means for detecting an actual traveling speed of a vehicle and a storage means for storing a target speed in the invention described in claim 1. A constant speed traveling control device for a vehicle, the control means controlling a speed adjusting element so as to match the actual traveling speed detected by the speed detecting means with the target speed. And a signal generation means for generating a speed-up instruction signal from this signal generation means,
It is characterized by further comprising a speed increasing setting means for changing the target speed by adding a predetermined speed increasing value to a larger value of the actual traveling speed and the target speed.

[0006]

In the invention described in claim 1,
The speed adjusting element is controlled so that the actual traveling speed detected by the speed detecting means matches the target speed stored in the storage means. Here, when the speed increasing instruction signal is generated from the signal generating means, the target speed is changed by adding a predetermined speed increasing value to the larger value of the actual traveling speed and the target speed.

Therefore, since the predetermined speed increase value is added to the larger one of the actual traveling speed and the target speed when the speed increasing instruction signal is generated, the actual traveling speed is much lower than the target speed when traveling uphill or the like. Even if the target speed is set, the newly set target speed can be reliably increased by the above-mentioned speed increase value by the above-mentioned speed increase value, and the feeling of speed increase at the start of speed increase can be improved. Can be

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In FIG. 1, a vehicle speed sensor 1 generates a vehicle speed pulse according to the traveling speed of the vehicle. The controller 2 inputs the vehicle speed pulse from the vehicle speed sensor 1 to calculate the actual traveling speed of the vehicle, and at the time of constant speed traveling, performs constant speed traveling control so that the actual traveling speed matches the target speed. It is composed of a RAM as a storage unit for storing data such as a target speed, a ROM for storing a control program, a CPU for executing various controls, and the like.

Signals from the set coast switch 3, the resume accelerator switch 4, and the cancel switch 5 are input to the controller 2. The set / coast switch 3 is operated when performing constant speed traveling or when reducing the vehicle speed, and the cancel switch 5 is operated when releasing constant speed traveling. Further, the resume / accelerator switch 4 is operated when increasing the vehicle speed, and constitutes a signal generating means for generating a speed increasing instruction signal.

From the controller 2, a control signal for matching the actual traveling speed of the vehicle with the target speed is output to the actuator 6 constituting the speed adjusting element. As the actuator 6, a vacuum type or a motor type can be used, and the valve opening degree of the throttle valve 7 is adjusted based on a control signal from the controller 2. By adjusting the valve opening of the throttle valve 7, the actual traveling speed of the vehicle is increased or decreased to match the target speed.

Next, the operation of the above structure will be described. When the ignition switch is turned on at the start of driving of the vehicle, power from the vehicle-mounted battery is supplied to the electric systems of the respective parts shown in FIG. 1, and the respective parts are brought into the operating state. And
The controller 2 executes arithmetic processing according to the control program. First, in step 10 shown in FIG. 2, the initialization process is performed to set the value of the target vehicle speed in constant speed traveling to 0, and the interrupt calculation process based on the vehicle speed pulse from the vehicle speed sensor 1 is permitted. Therefore, after this,
The vehicle speed is obtained by a vehicle speed interrupt calculation process (not shown). The vehicle speed calculation processing based on the vehicle speed sensor 1 and the vehicle speed pulse corresponds to the vehicle speed detecting means in the claims.

In the next step 11, it is determined whether or not constant speed traveling control is being performed. This determination is made by a timer interrupt program (not shown) using flags that are set and reset depending on the operating states of the switches 3 to 5 that are periodically checked. This step 11
If the set coast switch 3 has not been operated and the flag for it has not been set at, the non-control state process is performed at step 19. Specifically, the actuator 6 does not act on the throttle valve 7.

If the flag is set by the operation of the set coast switch 3 in step 11, the speed increasing control process in step 100, step 1
The control state process by 8 is performed. In the control state processing in step 18, the set coast switch 3
RA is the target speed which is the traveling speed of the vehicle when is operated.
The control signal is stored in M, and the control signal is sent to the actuator 6 so that the actual traveling speed matches the stored target speed, specifically, the deviation is eliminated according to the deviation between the target speed and the actual traveling speed. Output. Therefore, the actuator 6
The constant speed traveling is performed by adjusting the valve opening degree of the throttle valve 7 by. The control state process in step 18 corresponds to the control means in the claims.

In addition, in the speed-up control process in step 100, various speed-up controls are performed by operating the resume / accelerator switch 4. Specifically, the accelerator control is performed to keep the resume accelerator switch 4 turned on to increase the target speed value in proportion to the closing time, and the target speed value is changed by a short-time closing operation of the resume accelerator switch 4. Tap-up control to increase by a value corresponding to a predetermined speed, and operation of the resume / accelerator switch 4 after releasing the constant speed running to the target speed stored during the previous constant speed running The actual running speed There is a resume control or the like for recovering. As an example thereof, FIG. 2 shows the arithmetic processing of the accelerator control.

First, in step 12, when the resume / accelerator switch 4 is operated, the actual traveling speed is compared with the target speed stored in the RAM, and the larger speed is given a predetermined acceleration value (Vkm). The value obtained by adding / h) is stored in the RAM as the target speed. The process of step 13 corresponds to the speed increasing setting means in the claims. When the resume / accelerator switch 4 is continuously operated, the process proceeds from step 12 to step 14 to step 15, and the target speed stored in the RAM is set to a small constant value α (km in order to gradually increase the target speed over time. / h) is added to update the target speed. Since this processing is performed while the resume / accelerator switch 4 is being operated, a constant value α (km / h) is continuously added to the target speed, and the vehicle accelerates according to the addition and update of the target speed.

When the operation of the resume / accelerator switch 4 is completed, the actual traveling speed at that time is stored as the target speed by the processing from steps 16 to 17. Therefore, since the predetermined speed increase value is added to the larger of the actual traveling speed and the target speed at that time by the processing of step 13, the actual traveling speed is much lower than the target speed when traveling uphill or the like. Even when the speed is set, the newly set target speed can be reliably increased by the speed increase value above, and the speed feeling at the start of speed increase can be improved. can do.

Further, after the target speed is largely updated by the processing of step 13, the processing from step 12 to step 15 is repeated, and the target speed is gradually added and updated at a minute constant value. Therefore, it is possible to perform highly responsive acceleration according to the operation of the resume / accelerator switch 4. As described above, the control for increasing the actual traveling speed and the target speed by adding a predetermined acceleration value to the larger one is performed in other tap-up control and resume control in addition to the accelerator control. Is done in the same way.

In the above embodiment, when the resume / accelerator switch 4 is operated, the predetermined acceleration value (Vkm / h) is added to the larger of the actual traveling speed and the target speed. The acceleration value is not limited to a constant value, and may be, for example, a value according to the deviation between the actual traveling speed and the target speed, or may be a value according to the slope angle of the slope detected by the slope sensor or the like. .

In the above embodiment, the computer program is used to perform the constant speed traveling control, but the function realizing means in each step shown in FIG. 2 may be implemented by a hard logic configuration.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention.

FIG. 2 is a flow chart showing a calculation process of a controller in FIG.

[Explanation of symbols]

 1 Vehicle speed sensor 2 Controller 4 Resume / accelerator switch 6 Actuator 7 Throttle valve

Claims (1)

[Claims] 1. A speed detecting means for detecting an actual traveling speed of a vehicle, a storage means for storing a target speed, and a speed so that an actual traveling speed detected by the speed detecting means may coincide with the target speed. In a vehicle constant speed traveling control device including control means for controlling an adjusting element, a signal generating means for generating a speed increasing instruction signal, and when the speed increasing instruction signal is generated from this signal generating means, the actual traveling speed And a speed increasing setting means for changing the target speed by adding a predetermined speed increasing value to the larger one of the target speeds.