KR100254223B1 - Brake for a car - Google Patents

Abstract

PURPOSE: A pressure securing method forcibly rotates an ABS pump motor to secure short pressure even when an engine stall occurs to prevent an accident. CONSTITUTION: A method comprises a step to compare and determine whether a driving car is in high speed driving condition(S100), a step to determine whether a generator stops(an engine stall) if the car is in high speed driving(S200), a step to determine whether an idle switch is turned on or the opening amount of a throttle is lower than the critical value if the generator stops(S300), a step to determine whether a full brake switch is turned on if the idle switch is turned on or the opening amount of the throttle is lower than the critical value(S400) and a step to output ABS pump motor driving signal to secure braking pressure if the full brake switch is turned on(S500).

Description

How to secure the pressure of automobile brake

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for securing a pressure of an automotive brake. When braking is performed while an engine stall occurs during high-speed driving, the braking force of the brake is reduced only by the pedal pressure. And more particularly, to a method of securing an automotive brake pressure to increase a brake effect by adding the force of an ABS (anti-rock brake system) pump motor.

Until now, the brake system of the automobile has been using hydraulic type. This hydraulic brake generates hydraulic pressure from the master cylinder when the brake pedal is depressed, and this pressure is transmitted to the wheel cylinder cylinder to move the piston.

The brake shoe then expands and pushes against the drum, causing a braking action.

Recently, as the size of automobiles has been increased and disc brakes have been used, the force of stepping on the brake pedal also requires a large force, so that a braking force adjusting device is added. In order to uniformly distribute all the braking forces, The function of the apparatus is greatly improved.

However, since such a braking force adjusting device or ABS obtains a large force from the hydraulic pressure supplied by the rotation of the engine, when the engine stall occurs, the supply of the hydraulic pressure is interrupted, so that the function of the brake is lowered and thus a dangerous accident is likely to occur.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a braking device capable of forcibly rotating an ABS pump motor capable of generating hydraulic pressure even when there is no engine rotation, .

To achieve the above object, according to the present invention, there is provided a method of controlling a vehicle, Determining whether the generator is in a stopped state (engine stall) if the vehicle is in a high-speed running state; Determining whether the idle switch is on or the throttle opening is below a threshold value when the generator is in the stop state; Determining whether the full brake switch is on if the idle switch is on or the throttle opening is below a threshold value; When the brake switch is in a full-on state, outputting and braking the ABS pump motor driving signal.

1 is a block diagram of an apparatus for securing a brake pressure according to an embodiment of the present invention;

FIG. 2 is a flow diagram of a method for securing brake pressure in accordance with an embodiment of the present invention. FIG.

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

The construction of the present invention will be described with reference to FIG.

A vehicle speed sensor 11 that senses the current vehicle speed, a generator 12 that rotates together with the rotation of the engine, an idle switch 13 whose state varies depending on whether the accelerator pedal is operated or not, A throttle position sensor 14 for sensing the position of the throttle opening in which the state is varied, a brake switch 15 for changing the state according to a selection operation of the driver, and a sensing unit 11, 12, 13, 14, An engine control unit 20 for determining whether the engine is stalled or not by integrating signals inputted from the engine control unit 20 and outputting the determined control signal, An ABS pump motor driving unit 30; And an ABS pump motor 40 that performs a braking operation by a signal output from the ABS pump motor driving unit 30. [

The operation of the present invention as described above will now be described with reference to FIG.

In the case where the vehicle is braking while the vehicle is running or the engine is stalled and the braking is performed, the engine control unit 20 determines whether the vehicle is in a high-speed running state, It is determined whether the vehicle speed is equal to or greater than the threshold value (S100).

If it is determined in step S100 that the vehicle speed is less than or equal to the threshold value, the program returns to the main program. However, if it is determined that the vehicle speed is equal to or greater than the threshold value, it is determined in step S200 whether the generator 12 is stopped.

If it is determined in step S200 that the generator 12 is being driven, it returns to the main program because it is in a normal state. However, if it is determined that the generator 12 is in a stopped state, the engine control unit 20 The idle switch 13 is in the on state and the throttle position sensor 14 is gradually closed by the throttle position sensor 14 because the throttle position sensor 14 is gradually closed Deceleration is performed as the brake operation.

Next, the engine controller 20 determines whether the throttle opening degree detected by the idle switch 13 or the throttle position sensor 14 is equal to or less than a threshold value (S300).

If the throttle opening degree detected by the throttle position sensor 14 is greater than the threshold value, the idle switch 13 is turned off in step S300 and the accelerator pedal is depressed to return to the main program.

However, if it is determined in step S300 that the throttle opening degree detected by the idle switch 13 or the throttle position sensor 14 is below the threshold value, the brake pedal operation is being performed. It is determined whether the brake switch 15 for depressing the brake pedal to the full contact is in an on state (S400).

If it is determined in step S400 that the brake switch 15 is turned off, it is determined that the brake has not been applied. Therefore, the program returns to the main program in the normal state. On the other hand, when it is determined that the brake switch 15 is on, A motor drive signal is outputted to the ABS pump motor driving unit 30 to secure the brake hydraulic pressure (S500).

Accordingly, the ABS pump motor driving unit 30 operates the ABS pump motor 40 while operating by the driving signal, thereby securing the brake pressure.

As described above, according to the present invention, even when an engine stall occurs, the ABS pump motor is forcibly rotated to secure insufficient brake pressure, thereby preventing dangerous accidents.

Claims (1)

Determining whether the vehicle being driven is in a high-speed running state; Determining whether the generator is in a stopped state (engine stall) if the vehicle is in a high-speed running state; Determining whether the idle switch is on or the throttle opening is below a threshold value when the generator is in the stop state; Determining whether the full brake switch is on if the idle switch is on or the throttle opening is below a threshold value; And when the brake switch is in a full-on state, outputting an ABS pump motor drive signal to secure a braking pressure.