JPH0613263B2 - Slow travel stop device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a slow running stop device for an automobile or the like, and includes engine control, transmission control, and brake control.

[Conventional technology]

Conventionally, in order to control the speed of an automobile or the like, a throttle valve for adjusting the output of the engine has been opened and closed by pulling from an accelerator pedal with a wire such as a piano wire. However, recently, Isuzu Technical Report No. 7
As shown in Nos. 2 P7 to P20, a system has been announced in which the accelerator pedal and the throttle valve are separated and the throttle valve is opened and closed by an accelerator pedal depression sensor, a throttle valve drive motor and a controller. As shown in FIG. 2, this system reads the driver's will by detecting the output of the accelerator pedal sensor 1 by the computer unit 2 and performing signal processing.
Based on the information of the selector lever position sensor 7, the cooling water temperature sensor 20, the engine rotation sensor 8 that detects the rotation of the engine 17, the gear position sensor 21, the vehicle speed sensor 9, the clutch position sensor 22, and the like, the opening degree of the throttle valve 3 is determined. By driving the motor 4 to be adjusted, controlling the engagement and disengagement of the clutch 5 and the gear position of the transmission 6, the easy drive and the low fuel consumption are realized.

[Problems to be solved by the invention]

However, in the above-mentioned conventional device, when the road is congested and the car gradually becomes jerky and starts and stops repeatedly at a slow speed, the operation of depressing the accelerator and depressing the brake must be repeated. Also, if you step on the accelerator too much, the speed will increase, so you have to control the amount of the accelerator pedal, and the driver's tiredness was severe when driving for a long time, and a rear-end collision accident occurred.

The present invention has been made to solve the above-mentioned conventional problems, and is a slow travel stop device capable of reducing driver's fatigue during slow travel and performing safe travel. Aim to get.

[Means for solving problems]

In the slow travel stop device according to the present invention, when the driver commands the slow travel mode with the switch, the computer unit reads the command and drives the motor so as to keep the vehicle speed below the predetermined speed by depressing the accelerator pedal. To adjust the throttle valve and control the transmission and the clutch or a fluidly coupled automatic transmission. Further, when the accelerator pedal is released, the brake control device is activated, the brake is applied, and the automobile stops. Further, when the obstacle detection device detects an obstacle within a predetermined distance during slow running, the brake control device is activated and the vehicle is stopped.

[Action]

In the slow speed running mode, that is, the traffic jam running mode, the slow speed traveling device according to the present invention controls the gear position of the transmission and adjusts the opening degree of the throttle valve so that the vehicle starts to move at a low speed when the accelerator is depressed. The traveling speed can be kept almost constant by controlling the throttle opening while monitoring the vehicle speed with a computer. This speed is set independently of the accelerator depression amount. Further, when the accelerator is released, the brake control device operates, the brake is applied, the vehicle is stopped, and it is not necessary to step on the brake. Therefore, when the accelerator is stepped on, the vehicle starts, and when the accelerator is released, the vehicle stops and the driver's fatigue is greatly reduced. In addition, there is an obstacle detection device, and within 1 m of the front of the car, the preceding person, person, animal,
If there is an obstacle such as a wall, it is detected by an obstacle detection device, and the brake is activated to stop the vehicle. If the obstacle ahead is removed while the accelerator is stepped on, the vehicle will start automatically.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes an accelerator pedal sensor that detects the amount of depression when the driver depresses the accelerator. A variable resistor type sensor is often used, but a non-contact linear sensor is desirable. A computer unit 2 receives a lever position signal from a selector lever position sensor 7, an engine speed from an engine rotation sensor 8, and a vehicle speed from a vehicle speed sensor 9 in addition to the input from the accelerator pedal sensor 1. The transmission 6 is an automatic transmission having a so-called torque converter of a fluid coupling type, but may be of a type in which a plate-like clutch is used to connect and disconnect power and select a gear position as in the conventional case. It may be a combination of a clutch and. A throttle valve 3 is driven by a motor 4 to adjust the opening. The motor 4 is the computer unit 2
Controlled by. Further, the computer unit 2 includes a slow mode setting switch 10 and a turn signal switch 1
1. Throttle opening sensor 1 for detecting throttle opening
2 and the output of the accelerator switch 15 are input. Further, the computer unit 2 includes an obstacle detection device 16
The signal from is input. The obstacle detection device 16 is a system that emits ultrasonic waves and measures the distance to the obstacle in the time until the reflected wave returns, or an obstacle that emits light with a light emitting element and is irradiated with light. There is a method of measuring the distance by using the principle of triangulation in a triangle formed by the position of the light detector and the position, but the former is cheaper and has a wider detection range. However, in this case, whether or not an obstacle exists in a predetermined area is a problem, and the measurement accuracy is not so important. The output from the computer unit 2 not only drives the motor 4, but is also applied to the brake control device 13 to drive the brake. The brake can be operated by the obtained oil pressure by operating the hydraulic pump with the negative pressure of the engine or the rotational force of the engine. In addition, the output of the computer unit 2 drives the display device 14 such as a buzzer or a lamp for notifying the driver of the state.

Next, the operation of the above device will be described. First, when the slow speed mode setting switch 10 is off, the computer unit 2 sets the motor 4 so that the throttle valve 3 opens in a normal operation mode, for example, basically in proportion to the accelerator depression amount.
To drive. When the driver turns on the slow speed mode setting switch 10 in a situation where the vehicle enters a congested road and repeatedly starts and stops, when a slow speed mode setting switch 10 is turned on, a certain predetermined vehicle speed, for example, 15
In the case of Km / hour or less, the computer unit 2 permits the slow mode setting and informs the driver by the display device 14 such as a buzzer. This is because when the vehicle speed is high, for example, when the vehicle slowly travels on a highway and accidentally enters the slow speed mode, the brake is suddenly applied, which is dangerous. When the slow speed mode is entered, when the accelerator pedal is released, the brake is applied by the brake control device 13 and the stopped state is maintained without frequently pulling the side brake or continuing to step the brake even on a slope. When you step on the accelerator, computer unit 2
The brake control device 13 and the transmission 6 are controlled in accordance with a pre-programmed method, the brake is released, the vehicle gradually starts, and the vehicle runs at a predetermined low speed, for example, 5 to 10 km / hour. This speed and pattern are determined only by whether the pedal is depressed or released, regardless of the accelerator depression amount. The input signal from the accelerator pedal sensor 1 may be determined only by an analog signal, but it is preferable that there is an accelerator switch 15 for notifying that the accelerator pedal has been released. Further, the output of the obstacle detection device 16 is input to the computer unit 2, and if the obstacle detection device 16 detects an obstacle within a predetermined area in front, for example, within 1 m, the brake is activated by the brake control device 13, and the accelerator Do not start when you step on. This is done both in normal operation and in slow speed mode.
When the slow speed mode setting switch 10 is on, the selector lever is in the drive or first speed or second speed, and the output of the obstacle detection device 16 outputs a signal indicating no obstacle, the computer unit 2 At the same time as depressing the accelerator, the throttle valve 3 is started to be opened by the motor 4 to instruct the brake controller 13 to increase the output of the engine and release the brake. When the vehicle starts to move, the vehicle speed increases according to a predetermined pattern, and the opening degree of the throttle valve 3 is controlled so that the vehicle speed becomes constant. When the obstacle detection device 16 detects an obstacle in a predetermined area during traveling, the computer unit 2 issues a command to return the throttle valve 3 and operate the brake.
When the vehicle is stopped while the accelerator is still depressed and the obstacle is removed, the computer unit 2 opens the throttle valve 3 again, loosens the brake, and issues a start command. In this case, the driver is stepping on the accelerator, so the burden is lighter, but from the viewpoint of safety confirmation, it is better to return the accelerator to the original position and step on it again to start the vehicle when the vehicle stops. Of course, if the accelerator is released or the brake is depressed, the throttle valve 3 returns to its original position to activate the brake and stop the vehicle. When the brake is depressed while the accelerator is stepped on, the throttle valve 3 returns to its original state and the brake operates to stop the vehicle as in the above, but the vehicle starts when the accelerator is stepped on and the brake is released.

When the slow speed mode setting switch 10 is turned off, the slow speed mode is canceled and the normal mode is entered. It is preferable to release the slow mode even when the turn signal switch 11 is turned on. This is because it is often necessary to get out of the traffic jam when issuing a turn signal to change routes or making a right or left turn, and when making a right turn at an intersection etc., there is a straight ahead vehicle, so it is necessary to leave the intersection promptly. Because. However, in this case, since it is difficult for the driver to feel that the slow mode is continuing and that the brake will be applied just by releasing the accelerator pedal, it is not enough to let the driver know that slow mode has been released by a buzzer or the like. Also, if the slow mode is released with the accelerator fully depressed, rapid acceleration may occur. If the slow mode is released, the computer unit 2 should be programmed to gradually open the throttle valve 3. deep. However, when it is desired to accelerate suddenly, when the accelerator pedal is rapidly depressed after releasing the slow mode, the computer unit 2 reads a rapid acceleration command and opens the throttle valve 3 rapidly.

〔The invention's effect〕

As described above, according to the present invention, the vehicle can be started and stopped only by operating the accelerator by setting the slow speed mode when traveling during traffic congestion, and the vehicle can be driven at an extremely low speed without adjusting the accelerator depression amount. You can drive with, and it will stop automatically when a person or car approaches you, even if you are not looking at the front inadvertently. Therefore, it is possible to reduce the driver's fatigue during a traffic jam and to drive safely.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to the present invention, and FIG. 2 is a block diagram of a conventional apparatus. 1 ... Accelerator pedal sensor, 2 ... Control means (computer unit), 3 ... Throttle valve, 4 ... Throttle valve drive device (motor), 10 ... Slow speed traveling mode setting means (slow speed mode setting switch) , 13 ... Brake control device, 16 ... Obstacle detection device. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (3)

[Claims] 1. A slow running mode setting means for setting a slow running mode, an accelerator pedal sensor for detecting an accelerator depression amount, a throttle valve drive device for driving a throttle valve for adjusting an engine output, and a brake. Control device for controlling the vehicle, an obstacle detection device for detecting an obstacle within a predetermined distance ahead, the slow speed running mode setting means, an accelerator pedal sensor and an output of the obstacle detection device, and a throttle valve. Output to the drive unit and brake control unit, and if the accelerator is stepped on in the slow speed running mode, the vehicle will run at a slow speed below a specified speed,
A slow-speed traveling stop device comprising: a control means for controlling to apply a brake to stop the vehicle when the accelerator is released, and a control means for applying a brake even when an obstacle is detected. 2. The control unit according to claim 1, further comprising means for not allowing the setting of the slow running mode when the signal from the vehicle speed sensor is inputted and the vehicle speed exceeds a predetermined value. Fast travel stop device. 3. The slow speed traveling stop according to claim 1, further comprising means for canceling the slow speed running mode when the turn signal switch signal is turned on to the control means. apparatus.