KR20010093498A - Method for preventing the vehicle from sudden acceleration by using the dual accelerator pedal sensors - Google Patents

Abstract

PURPOSE: A sudden acceleration preventive method by using a dual accelerator sensor is provided to prevent an accident from sudden acceleration by controlling fuel injection with installing two accelerator sensors, and to repair promptly by alarming wrong operation to a driver. CONSTITUTION: Data and programs are initialized with turning on an ignition terminal in detecting condition of an ignition key by an electronic control unit, and parts are checked and values of sensors are measured. The reference value is compared with detecting voltage difference from two accelerator sensors. The ignition is performed in case of the detected value to be below the reference value, and the detected value is compared with the reference value with detecting the voltage difference again. The fuel is injected normally according to stepping on the accelerator pedal in case of the voltage difference to be below the reference value. The fuel injection is stopped or the minimum quantity of fuel is injected in case of the voltage difference to be over the reference value. A lamp for displaying wrong operation is actuated. The sudden acceleration from excessive fuel injection and the accident are prevented, and the reliability is improved with alarming the failure promptly.

Description

Method for preventing the vehicle from sudden acceleration by using the dual accelerator pedal sensors}

The present invention relates to a vehicle sudden start prevention method using a dual axel pedal sensor, and more particularly, a sudden acceleration accident that may occur due to a sensor error in a vehicle equipped with a diesel engine is equipped with two axel pedal sensors, the voltage in these sensors If the vehicle is over the standard value, it is judged as an error and the minimum amount of combustion for engine idling is injected or the fuel injection is stopped altogether to prevent the occurrence of safety accidents due to sudden start and to operate the lamp to inform the failure. Invented to receive after-sales service in a short time.

Recently, the cause of this problem is not known in automobiles equipped with automatic transmission. However, when the shift lever is changed, it is rapidly accelerated irrespective of the driver's intention, causing a lot of property damage and injury. It is becoming a big problem.

The most widely used technology for accident prevention system due to abnormal acceleration of a vehicle equipped with such automatic transmission is shift lever lock method, which requires the driver to step on the brake pedal and the shift lever is driven (D) range. It is a system designed to change from one state to another.

However, the companies that manufacture automobiles in our country, because of the high manufacturing cost, such a shift lever lock method is not applied to the cars marketed in Korea, the situation is mainly applied only to export vehicles.

Therefore, the automatic transmission vehicle currently in the domestic market is defenseless against accidents caused by abnormal acceleration.

In addition, in the past, the diesel engine has a mechanical fuel injection pump, and an electronic control system is developed due to the development of technology in accordance with the strengthening of environmental regulations. As a result, the diesel engine is gradually installed in a passenger car as well as a commercial vehicle.

Unlike the gasoline engine, the engine output of such a diesel vehicle is controlled by the amount of fuel, and the fuel amount is injected in advance by the engine speed and the accelerator opening.

Here, the accelerator opening amount is determined by measuring the output voltage of the sensor for detecting the accelerator opening (that is, the accelerator pedal sensor) that is changed in response to the driver's stepping on the accelerator pedal and measuring the output voltage of the fuel in response to the result. The injection amount is determined.

However, in the conventional diesel engine vehicle, the electronic control unit is configured to determine the opening amount of the axel depending on the output value of one axel pedal sensor as described above. Is generated and the voltage actually detected is output in an area which is not judged as its disconnection or short circuit, the electronic control unit does not recognize this as an error and in response to the voltage, an excessive amount of fuel may be injected to cause a sudden oscillation.

The present invention has been made to solve such a conventional problem, it is determined that if the voltage difference in the sensor is equipped with two axel pedal sensors in a vehicle equipped with a diesel engine is more than the reference value and determined as an error for engine idling By injecting a minimum amount of combustion or stopping fuel injection at the same time, it is possible to prevent sudden occurrences and safety accidents that may be caused by excessive fuel injection, and at the same time, operate a lamp that informs the user of the failure. It is an object of the present invention to provide a method for preventing a sudden start of a vehicle using a dual axel pedal sensor to receive after-sales service in time.

The above object of the present invention is to initialize the respective data in the electronic control unit when the ignition terminal of the ignition key is "on" and at the same time measuring error checks and various sensor values; Detecting a voltage difference output from two axel pedal sensors installed at both sides of the axel pedal to perform a rotational movement about a predetermined axis in response to the driver's stepping force, and determining whether the value is less than a reference value; Detecting the voltage difference output from the two axel pedal sensors after ignition if the value is less than the reference value, and determining whether the value is less than the reference value; A normal fuel injection progress step of injecting fuel corresponding to the stepping amount of the axel pedal when it is less than the reference value as determined in the previous step; As a result of judging at each of the two steps, if the voltage difference output from the two axel pedal sensors is greater than or equal to the reference value, it is achieved by controlling the step of operating the lamp for indicating failure while stopping or injecting fuel injection at a minimum amount.

Therefore, it is possible to prevent accidents due to excessive injection of fuel, which may be caused by an error of the accelerator pedal sensor, and to receive after-sales service as soon as possible.

1 is a block diagram of a fuel injection control unit to which the present invention is applied.

2 is a flowchart for explaining the method of the present invention.

Explanation of symbols on main parts of drawing

1: Start key state detection unit 2, 3: Axel pedal sensor

4: Axel pedal 5: Electronic control unit

6 fuel injector 7 failure indicator lamp

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a fuel injection control unit to which the present invention method is applied, and accordingly, a start key state detection unit 1 for detecting a state of a start key that is turned on and off by a driver; Two axel pedal sensors (2) (3) installed at both sides of the axel pedal (4) for performing a rotational movement about a predetermined axis in response to the driver's stepping force and detecting a stepping amount of the axal pedal as a voltage; While controlling the overall electric parts of the vehicle electronics through a predetermined program, the voltage difference output from the two axel pedal sensors (2) and (3) is detected and compared with a reference value. An electronic control unit 5 which outputs to the injector 6 and the failure indication lamp 7; A fuel injector 6 for injecting fuel corresponding to the output value of the electronic control unit 5 into the diesel engine; When the drive signal is output from the electronic control unit 5, it is turned on so that the driver can visually recognize the failure state.

On the other hand, Fig. 2 shows a flowchart for explaining the method of the present invention. According to this, when the ignition terminal is "on" as a result of detecting the state of the ignition key in the electronic control unit 5, various data stored therein are stored. And initializing a control program and the like and measuring error checks and various sensor values for each component (S1).

Detecting a voltage difference output from the two axel pedal sensors (2) (3) and determining whether the value is less than a reference value (S2);

Performing ignition if it is less than a reference value as determined in the step S2;

Detecting a voltage difference output from the two axel pedal sensors (2) and again determining whether the value is less than a reference value (S4);

If the voltage difference between the two axel pedal sensors (2) (3) is less than the reference value as a result of judging in the previous step (S4) and the fuel injection normally proceeds in response to the stepped step of the accelerator pedal (S5);

(S6) stopping fuel injection to a minimum or minimum amount if the voltage difference output from the two axel pedal sensors (2) and (3) is greater than or equal to the reference value as determined in each of the two steps (S2) and (S4);

Since it is characterized in that the step (S7) for operating the failure display lamp (7).

Referring to the effects of the present invention configured as described above are as follows.

First, the fuel injection control unit to which the method of the present invention is applied is provided with an accelerator pedal sensor (2) (3), one at each side of each of the axel pedals (4) for performing a rotational movement about a predetermined axis in response to the driver's stepping force. Except for judging an error of a sensor through these voltage difference detection, it has the same structure as before.

That is, the fuel injection control unit to which the method of the present invention is applied includes a starter key state detection unit 1, two axel pedal sensors 2 and 3, an electronic control unit 5, a fuel injector 6, and a lamp for indicating a failure. 7).

The electronic control unit 5 in the control unit having such a configuration normally receives the output signal of the start key state detection unit 1 and continuously detects the state of the start key. As a result, the movable terminal has an ignition terminal. When connected to the controller, various data and control programs stored therein are initialized, and error checks and various sensor values for each component are read and measured (S1).

Then, the electronic control unit 5 receives the voltage difference output from the two axel pedal sensors 2 and 3 installed on both sides of the axel pedal, obtains the difference value, and sets the difference voltage in advance. It is determined whether the reference value is less than or above the set value (S2).

As a result of the determination, if the voltage difference output from the two axel pedal sensors 2 and 3 is less than the reference value, the sensor recognizes the normal operation state and performs ignition (S3).

After igniting the diesel engine as described above, the electronic control unit 5 again detects the voltage difference between the voltages output from the two axel pedal sensors 2 and 3 and determines whether the value is less than or equal to the reference value. It is determined again (S4), which is determined whether the same voltage is input between them even when the driver inputs two axel pedal sensors 2 and 3 by the driver after operating the engine. This is to determine whether an error occurs in the sensor.

As a result of the determination, if the difference voltage between the two axel pedal sensors 2 and 3 is less than the reference value, it is determined that the two sensors are operating normally, and the fuel injector 6 is opened and closed in response to the stepping of the current accelerator pedal. The normal fuel corresponding to the state of the is to be injected into the diesel engine (S5).

However, if the difference between the voltages output from the two axel pedal sensors (2) and (3) is determined to be higher than the reference value in each of the two steps (S2) and (S4), respectively, an error occurs in either of the two sensors. And the electronic control unit 5 stops the driving of the fuel injector 6 to block the injection of fuel into the diesel engine, or by controlling only the minimum amount to be injected (S6). It is possible to prevent sudden accidents that may occur due to this.

In addition, the electronic control unit 5 operates the failure display lamp 7 installed at the front of the driver's seat (S7), so that the driver can immediately recognize this and make an after-sales service request in a short time.

As described above, according to the present invention, two axel pedal sensors are mounted on a vehicle equipped with a diesel engine, and when the voltage difference is higher than the reference value in these sensors, an error is determined and the minimum amount of combustion for engine idling is injected. By stopping the fuel injection altogether, it is possible to prevent the sudden start and the resulting safety accident that may be caused by excessive fuel injection, and at the same time operate the lamp that informs the customer of the problem, It is a very useful invention, such as receiving a service and greatly improving reliability.

Claims (1)

Controls the fuel injection control unit for the vehicle, which comprises a starter key state detection unit 1, two axel pedal sensors 2 and 3, an electronic control unit 5, a fuel injector 6, and a failure indication lamp 7. In that, As a result of detecting the state of the ignition key in the electronic control unit 5, if the ignition terminal is "on", the various data and control programs stored therein are initialized, and error checking and various sensor values for each component are initialized. Measuring them (S1); Detecting a voltage difference output from the two axel pedal sensors (2) (3) and determining whether the value is less than a reference value (S2); Performing ignition if it is less than a reference value as determined in the step S2; Detecting a voltage difference output from the two axel pedal sensors (2) and again determining whether the value is less than a reference value (S4); If the voltage difference between the two axel pedal sensors (2) (3) is less than the reference value as a result of judging in the previous step (S4) and the fuel injection normally proceeds in response to the stepped step of the accelerator pedal (S5); (S6) stopping fuel injection to a minimum or minimum amount if the voltage difference output from the two axel pedal sensors (2) and (3) is greater than or equal to the reference value as determined in each of the two steps (S2) and (S4); After the failure display lamp (7) to operate the vehicle sudden start prevention method using a dual axel pedal sensor, characterized in that consisting of.