KR20020052304A - Braking method parking break system of vehicle - Google Patents

Abstract

PURPOSE: A braking method of a parking brake apparatus for a vehicle is provided to prevent the vehicle from rolling back on an incline road by generating braking force automatically in restarting after parking or stopping on an uphill road or a downhill road, and to prevent accidents by relieving fatigue of a driver. CONSTITUTION: An electronic control unit detects a vehicle on an inclined road in starting the vehicle on an uphill road or a downhill road, and transmits a control signal to a first relay to connect circuits partially between a hydraulic pump to a power supply member(21,22). Circuits are connected partially with transmitting the control signal to a second relay in releasing an accelerator pedal(23,24), and connected completely by transmitting the control signal to a third relay in stopping the vehicle(25,26). The hydraulic pump is driven in supplying power to the hydraulic pump, and brake oil is supplied to a hydraulic cylinder with opening a solenoid valve(27,28). A piston is moved into a cylinder in supplying brake oil to the cylinder member, and braking force is generated with pulling a parking brake cable(29,31). The quality is improved, and fatigue is reduced with preventing the vehicle from rolling back in starting the vehicle on the uphill road or the downhill road.

Description

How to brake the parking brake system of a car {BRAKING METHOD PARKING BREAK SYSTEM OF VEHICLE}

The present invention relates to a method for braking a parking brake device for a vehicle, and in particular, a method for braking a parking brake device for a vehicle that can prevent a vehicle from being pushed when starting from an incline of an downhill or an uphill road, thereby preventing a safety accident from occurring. It is about.

In general, a vehicle is provided with a parking brake device that can restrain unwanted movement of a vehicle on a slope by forcibly restraining the rear wheels during a parking stop.

The parking brake pulls the cable connected to the equalizer as the cable rod is pulled according to the operation of the control lever, and at the same time, the shoe is brought into close contact with the brake drum of the rear wheel to brake the rear wheel by the friction force generated at that time. .

However, if the driver disengages the parking brake for departure after stopping the vehicle on a downhill or uphill road with a high inclination angle, the vehicle is pushed along the inclination angle, so that the driver does not operate the parking brake or foot brake again. When the vehicle is moved along the slope there was a problem causing a safety accident.

Accordingly, the driver passes the ramp while manually operating the parking brake or foot brake to prevent safety accidents, but when the driver passes the ramp while manually operating the driver, the driver's fatigue increases and another safety accident occurs. Problems that could be caused remain.

Accordingly, the present invention has been made to solve the above problems, by automatically operating the parking brake device when starting from the slope of the downhill or uphill to prevent the vehicle from being pushed on the slope and thereby caused a safety accident The purpose of the present invention is to provide a method of braking a parking brake device for a vehicle that can prevent not only the fatigue of the driver, but also the fatigue of the driver.

In order to achieve the above object, the present invention provides an electronic control unit in which a vehicle is positioned on a slope by a signal transmitted from a ramp recognition sensor, a throttle track sensor, and a vehicle speed sensor, and a driver's foot is separated from an accelerator pedal. Determining that the vehicle is in a stopped state, supplying power to the control signal of the electronic control unit to open the electronic control valve mounted on the hydraulic supply pipe while driving the hydraulic pump, and driving the hydraulic pump. The brake oil stored in the hydraulic tank is supplied to the hydraulic piston through the hydraulic supply pipe and the parking brake cable connected to the piston member is pulled to generate a braking force so that the vehicle can slow down on the slope. .

1 is a schematic configuration diagram for explaining a parking brake braking method according to the present invention;

Figure 2 is a longitudinal cross-sectional view for explaining the operation of the ramp recognition sensor used in the present invention,

3 is a schematic block diagram illustrating a braking method of a parking brake apparatus according to the present invention;

4 is a schematic flowchart illustrating a braking method of a parking brake apparatus according to the present invention.

<Description of Symbols for Main Parts of Drawings>

1-Ramp sensor 2-Throttle track sensor

3-Vehicle speed sensor 4-Electronic control unit

5-Hydraulic Pump 6-Hydraulic Supply Pipe

7-solenoid valve 8-hydraulic tank

9-Hydraulic cylinder 11-Power supply member

12-Return Pipe 13-Relay 1

14-2nd Relay 15-3rd Relay

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

1 is a schematic configuration diagram for explaining a parking brake braking method according to the present invention, Figure 2 is a longitudinal sectional view for explaining the operation of the ramp recognition sensor used in the present invention, Figure 3 As a schematic block diagram for explaining a braking method of a parking brake apparatus according to the present invention, a configuration for automatically operating the parking brake apparatus on a downhill or an uphill slope according to the present invention is illustrated in FIG. A ramp recognition sensor (1) for detecting whether the position is located on the top, a throttle track sensor (2) for detecting whether the driver's foot is separated from the accelerator pedal, and a vehicle speed sensor for detecting that the vehicle is in a stopped state ( 3) and an electronic control unit (ECU) 4 for comparing and analyzing the signals transmitted from the ramp recognition sensor 1, the throttle track sensor 2, and the vehicle speed sensor 3.

In addition, the configuration for automatically operating the parking brake device, the hydraulic pump 5 to be driven while the power is supplied from the power supply member 11 by the control signal of the electronic control unit (4; ECU), and the hydraulic pressure The piston member comprises an electronic control valve 7 mounted on a supply pipe 6 and opened by a control signal of the electronic control unit 4 (ECU), a cylinder member 9a and a piston member 9b. (9b) is connected to the parking brake cable and the hydraulic supply pipe (6) is connected to the hydraulic piston (9) which is operated to pull the parking brake cable by the brake hydraulic pressure, the hydraulic piston (9) and the return pipe ( It is composed of a hydraulic tank (8) connected to the hydraulic pump (5) while being connected via 12).

In addition, between the hydraulic pump 5 and the power supply member 11 and the first relay 13, which is connected to the ramp recognition sensor 1 and opened by a control signal of the electronic control unit 4 (ECU); A second relay 14 which is connected to the throttle track sensor 2 and opened by a control signal of the electronic control unit 4 (ECU), and the electronic control unit 4 connected to the vehicle speed sensor 3. And a third relay 15 which is opened by the control signal of the ECU.

Here, the ramp recognition sensor (1) is a rectangular case (1a) having a closed cross section as shown in Figure 2, a pair of piezoelectric sensors (1b) installed inside one side of the case (1a), A compression spring 1c having one end fixed to the pressure contact sensor 1b, a pressing plate 1d installed to be elastically movable toward the pressure contact sensor 1b while being fixed to the tip of the compression spring 1c, and It is composed of a pressure sphere (1e) is installed to enable the cloud movement in the case (1a) to press the pressure plate (1d) to operate the pressure point sensor (1b) when the vehicle is located on the slope of the downhill road have.

Hereinafter, a method for automatically operating the parking brake device when the vehicle is about to start on the slope of the downhill or the uphill according to the present invention will be described in detail with reference to FIGS. 1 to 4.

First, when the driver parks or stops on the slope of the downhill or the uphill, and the driver starts to restart, the electronic control unit 4 (ECU) is connected to the vehicle by the signal transmitted from the ramp recognition sensor 1. It is determined that it is located on the ramp (step 21). At the same time, a control signal is transmitted to the first relay 13 to partially connect the circuit between the hydraulic pump 5 and the power supply member 15 (step 22). )

Then, when the electronic control unit 4 (ECU) determines that the driver's foot is out of the accelerator pedal by the signal transmitted from the throttle track sensor 2 (step 23), at the same time, the second relay 14 The control signal is transmitted to the circuit to partially connect the circuit between the hydraulic pump 5 and the power supply member 15 (step 24).

In addition, when the electronic control unit 4 (ECU) determines that the vehicle is in a stopped state (step 25) by the signal transmitted from the vehicle speed sensor 3, at the same time, the control signal is transmitted to the third relay 15 to supply the hydraulic pump. (5) and the circuit between the power supply member 15 are completely connected (step 26).

Accordingly, when the power of the power supply member 15 is supplied to the hydraulic pump 5, the hydraulic pump 5 is driven by the control signal of the electronic control unit 4 (ECU) (step 27). The valve 7 is opened (step 28) so that the brake oil in the hydraulic tank 8 is supplied to the hydraulic cylinder 9 through the hydraulic supply pipe 6.

Then, when brake oil is supplied into the cylinder member 9a of the hydraulic cylinder 9, the piston member 9b is moved into the cylinder member 9a by the pressure of the oil (step 29), and at the same time the cylinder As the parking brake cable connected to the member 9a is pulled, the parking brake device is operated to generate a braking force (step 31).

On the other hand, the braking force generated when the parking brake cable is pulled generates a braking force such that the vehicle located on the slope of the downhill or the uphill can descend to the slow speed.

When the driver steps on the accelerator pedal after the vehicle completely exits the downhill or the uphill road, the electronic control unit 4 (ECU) is stepping on the accelerator pedal by a signal transmitted from the accelerator pedal sensor 16. At the same time, the electronic control unit 4 (ECU) shorts the second relay 14 connected to the throttle track sensor 2 to cut off the power supplied to the hydraulic pump 5.

Accordingly, when the power supply to the hydraulic pump 5 is cut off, the driving of the hydraulic pump 5 is stopped, and the braking force generated by the parking brake device is released, thereby driving the vehicle normally.

On the other hand, when the power to the hydraulic pump 5 is cut off, the parking brake cable is elastically returned to its original position by the return spring (not shown) of the parking brake device, and at the same time the piston member 9b is also cylinder The member 9a is returned to its original position.

As described above, according to the present invention, when the vehicle parks or stops on the slope of the downhill or the uphill, and starts again, the braking force is automatically generated by the parking brake device, thereby preventing the vehicle from being pushed on the slope. The occurrence of safety accidents is prevented, and the fatigue of the driver is reduced, thereby improving the merchandise.

Claims (2)

By the signals transmitted from the ramp recognition sensor 1, the throttle track sensor 2, and the vehicle speed sensor 3, the electronic control unit 4 (ECU) is positioned on the ramp and the driver's foot is released from the accelerator pedal. Determining that the vehicle is in a stopped state and the vehicle is in a stopped state, and power is supplied by a control signal of the electronic control unit 4 (ECU) to drive the hydraulic pump 5 while the electronic control mounted to the hydraulic supply pipe 6 is installed. The valve 7 is opened, and the brake oil stored in the hydraulic tank 8 by the driving of the hydraulic pump 5 is supplied to the hydraulic piston 9 through the hydraulic supply pipe 6 and the piston member ( 9b) is a parking brake cable connected to the braking method of the vehicle comprising the step of generating a braking force to the degree of slow running along the ramp. The electric power supplied to the hydraulic pump (5) according to claim 1, wherein when the electronic control unit (ECU) determines that the driver is stepping on the accelerator pedal by a signal transmitted from the accelerator pedal sensor 16, A method of braking a parking brake apparatus for a vehicle, characterized in that the braking force is released by stopping the driving of the hydraulic pump (5) by short circuiting.