JP3522417B2 - Car speed control device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle speed control device for controlling a vehicle speed when following a preceding vehicle. 2. Description of the Related Art Conventionally, when following a preceding vehicle, for example, during a traffic jam, speed control is performed by stepping on an accelerator pedal and a brake pedal. In the conventional speed control by operating the two pedals, the burden on the driver is increased, and an idle running time is generated at the time of stepping over, so that the response may be delayed when the preceding vehicle suddenly brakes. There is a problem. [0004] To solve this problem, there is an automatic traveling apparatus (auto cruise apparatus) which performs following traveling based on the inter-vehicle distance to a preceding vehicle. [0005] However, in the above-mentioned conventional automatic traveling device that performs following travel based on the inter-vehicle distance to the preceding vehicle, a sensor or the like for detecting the inter-vehicle distance to the preceding vehicle is required. Therefore, there is a problem that the cost increases. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a vehicle speed control device capable of eliminating idle running time and reducing costs. According to the present invention, there is provided a follow-up detecting means for detecting a follow-up running to a preceding vehicle, and a step of operating a brake pedal, the first step in which the brake pedal is not depressed, a stop. The following operation is detected by the brake operation detecting means for detecting which of the second stage in which the lamp is lit and the braking oil pressure is not generated and the third stage in which the braking oil pressure is generated, Accelerating means for accelerating the traveling speed to the following speed when the brake operation detecting means detects that the operation stage is the first stage;
And vehicle speed holding means for holding the running speed at the current speed when the following running is detected by the following detecting means and when the brake operation detecting means detects that the operation stage is the second stage. Features and features. An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 are diagrams for explaining a speed control device for a vehicle according to an embodiment of the present invention. FIG. 1 is a configuration diagram of the speed control device, and FIG. FIG. In FIG. 1, reference numeral 1 denotes a vehicle speed control device according to the present invention. The speed control device 1 includes a throttle opening sensor 2 for detecting a throttle opening, and a brake pedal switch that is turned on when a stop lamp (not shown) is turned on in accordance with a depression amount of a brake pedal connected to a hydraulic braking system. 3, a control oil pressure detection sensor 9 for detecting that a control oil pressure is generated, a vehicle speed sensor 4 for detecting a traveling speed, and a follow-up switch (cruise switch) 5 which is turned on when the vehicle follows the preceding vehicle. It has. Also, a throttle actuator 6 for controlling the output of the engine electrically by adjusting the opening of the throttle valve of the engine to increase or decrease the amount of intake air, and a shift control actuator for controlling the automatic transmission of the vehicle. 7 are provided. Then, the ECU 8 controls the sensors 2, 4,
The traveling state of the own vehicle is determined based on signals from the switch 9 and the switches 3 and 5, and the actuators 6 and 7 are controlled according to the determination result. Next, based on FIG.
The operation of will be described. When the following switch 5 is turned on by the driver during a traffic jam or the like, and it is detected that the vehicle is following the preceding vehicle, the average vehicle speed is learned and stored and updated sequentially (step S1). . The vehicle speed when the accelerator pedal and the brake pedal change from the depressed state to the released state is sequentially taken in as the vehicle speed data, and the average vehicle speed is learned based on these. If the accelerator pedal is depressed, acceleration for normal running is performed according to the depression amount (steps S2 and S3). The following switch 5
If is off, the process is terminated; if on, the process returns to the step S1. In step S2, if the accelerator pedal is not depressed, the step of depressing the brake pedal is determined in step S5 based on the input from the brake pedal switch 3 and the brake oil pressure detection sensor 9. In step S5, if the brake pedal switch 3 is off and the brake pedal is not depressed, the step of depressing the brake is determined to be the first step. The vehicle is accelerated to the following speed (average vehicle speed) (step S6). If the cruise switch remains on in step S4, the process returns to step S1 and the process is repeated.
In step S6, after the throttle is opened until the following speed is reached, the opening of the throttle is adjusted so that the following speed is maintained. In step S6, when the running speed at that time is higher than the following speed, the vehicle speed at that time is held. In step S5, when the brake pedal switch 3 is ON and the brake oil pressure detection sensor 9 is OFF, the ECU 8 determines that the brake depression step is the second step. (Step S7), and the process of step S4 is performed. In step S7, the throttle opening is maintained at a value that does not cause deceleration by the engine brake. In step S5, when the brake pedal switch 3 is turned on and the brake oil pressure detection sensor 9 is turned on, the brake is depressed in the third step.
It is determined to be the stage, and normal brake braking is performed (step S8), and the process proceeds to step S4. As described above, the operation stages of the brake pedal are distinguished into non-operation, only foot operation, and first to third stages of braking, and the traveling speed is controlled in accordance with the operation stage. As a result, it is possible to drive at a constant speed simply by putting the foot on the brake pedal, eliminate the idle running time due to stepping between the brake and the accelerator, and detect the distance between the preceding vehicle and the vehicle This eliminates the need for a sensor or the like, thereby reducing costs. As described above, according to the vehicle speed control device of the present invention, if the brake pedal is not depressed during the following running, the vehicle accelerates to the following speed, and the stop lamp is turned on during the following running. If the brake hydraulic pressure is not generated, the speed at that time is maintained, so it is possible to follow the constant speed simply by putting the foot on the brake pedal, and switch between the accelerator pedal and the brake pedal Therefore, there is an effect that the idle running time can be eliminated, and an inter-vehicle distance sensor can be eliminated, so that the cost can be reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram of a vehicle speed control device according to an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the embodiment device. [Description of Signs] 1 Speed control device 5 Follow-up switch (follow-up detection means) 8 ECU (Brake operation detection means, acceleration means, vehicle speed holding means)

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ identification code FI F16H61 / 46 F16H61 / 46 A (58) Investigated field (Int.Cl. ⁷ , DB name) B60K 31/00 B60K 41 / 04 B60T 7/12 F02D 29/02 301 F02D 41/04 F16H 61/46

Claims (1)

(57) [Claims 1] A follow-up detecting means for detecting a follow-up traveling to a preceding vehicle, a brake pedal operating stage is a first stage where the brake pedal is not depressed, and a stop lamp is provided. A brake operation detecting means for detecting which of a second stage in which the brake hydraulic pressure is generated and a third stage in which the brake hydraulic pressure is generated; When the detecting means detects that the operation step is the first step, the acceleration means for accelerating the traveling speed to the following speed, the following detection is detected by the following detection means, and the operation step is detected by the brake operation detecting means. A vehicle speed control device comprising: vehicle speed holding means for holding the running speed at the speed at the time when the second stage is detected.