WO2009088208A2

WO2009088208A2 - Electric parking brake for motor vehicle

Info

Publication number: WO2009088208A2
Application number: PCT/KR2009/000055
Authority: WO
Inventors: Jae-Chan Kim
Priority date: 2008-01-08
Filing date: 2009-01-07
Publication date: 2009-07-16
Also published as: KR20080009338A; WO2009088208A3

Abstract

The present invention relates to an electric parking brake for a motor vehicle capable of being automatically set and released in accordance with the start-up and stoppage of the motor vehicle. A parking brake (1) of the present invention includes a motor-operated valve (A) which is electrically connected to an ignition switch (B) operating by a vehicle start key and mounted on oil feed pipes (6,6') arranged between a master cylinder (3) and braking units provided on a front wheel(4) and a rear wheel (5), respectively, in such a manner that the motor operated valve controls the opening/shutting operation of said oil feed pipes (6,6') by being electrically controlled in accordance with the start-up and stoppage of the motor vehicle, wherein the motor-operated valve (A) includes a motor and a valve connected to a shaft of the motor so as to rotate in forward and rearward directions and control oil feeding; a relay (C) electrically connected to the ignition switch (B) connected to the motor-operated valve (A); a parking brake warning lamp (D) disposed on an instrument panel of the motor vehicle in such a manner that the lamp flickers in accordance with the operation of the motor operated valve (A); and a manual switch (E) disposed on a dash board of the motor vehicle so as to manually control the operation of the motor operated valve (A). The present invention includes the motor operated valve (A) arranged on said oil feed pipes (6,6') which interconnect the master cylinder (3) and braking units on the respective front and rear wheels (4,5) such that the motor-operated valve controls the braking operation of the motor vehicle by controlling the opening/shutting operation of said oil feed pipes (6,6') in accordance with the start-up and stoppage of the motor vehicle. Thereby, the parking brake of the present invention improves safety during parking by preventing the valve from being erroneously opened/shut by the pressure of oil flowing in high pressure or magnetic forc

Description

Electric parking brake for car

An object of the present invention is to provide an electric parking brake for a vehicle in which the parking brake can be automatically braked and released according to whether the vehicle is started.

The brake system used in automobiles is a means for slowing down and braking the vehicle and maintaining a lock state to prevent the wheels from flowing during parking. The main brake system is a foot brake and a secondary brake is a parking brake. It is a situation that the related laws stipulate to have two or more braking devices such as [or hand and side brakes]. In general, front wheels use disc brakes and rear wheels use drum brakes. When the brakes of the front and rear wheels are hydraulically pressed, the pressure is generated by the piston in the master cylinder, and the brake oil is supplied to the caliper of the front wheel or the wheel cylinder of the rear wheel through the oil supply pipe. Alternatively, the brake shoe generates contraction or expansion force to cause braking.

Most of these conventional parking brakes are mechanical, and require separate operation by hand or foot. Therefore, they are more cumbersome at parking and departure. There were a number of problems, such as getting off without pulling and leading to an accident.

The inventor has received a patent (No. 720752) for an electric brake for a vehicle that can solve this problem.

In the case of the above patent, the oil flowing from the master cylinder onto the oil supply pipe was selectively shut off and opened using a solenoid valve.

However, in the case of the solenoid valve, the pressure of the oil moving at high pressure may open arbitrarily, which may lead to a big accident during parking on the slope road, and the solenoid valve using the electromagnet may malfunction due to external magnetic force. Frequently, there was an urgent need for a solution to solve this problem.

The present invention is to provide an improved electric parking brake that can solve the problems of the inventors of the electric parking brake for automobiles, as described above.

The electric parking brake for automobiles provided by the present invention is electrically connected and wired with an ignition switch operated by an automobile ignition key, and the electric parking brake is electrically connected to an oil supply pipe piped between a master cylinder and a braking device installed on front and rear wheels. Electric valve which is controlled by means of control and installed to control opening and closing of the oil supply pipe,

The electric valve is composed of a motor, a valve connected to the shaft of the motor and the forward and reverse rotation to regulate the supply of oil, a relay electrically connected to the ignition switch connected to the electric valve, and the electric motor on the instrument panel Parking brake warning lights flashing according to whether the valve is operating, and manual switch for manually controlling the operation of the electric valve on the car dashboard.

As described in detail above, the vehicle electric parking brake 1 provided in the present invention includes an

oil supply pipe

6, 6 ′, 6 ″ connected to a master cylinder 3 and a braking device on the front and rear wheels 4, 5. ) Install the electric valve (A) controlled by starting or not (= ignition switch ON / OFF state), and oil supply pipe (6, 6 ', 6 ") By controlling the opening and closing of the vehicle and controlling the braking of the vehicle, it is possible to prevent a malfunction in which the valve 11 is arbitrarily opened and closed by the pressure of the oil moved to a high pressure or an external magnetic force, thereby maximizing safety when parking, and the valve 11 When closed, the closed state can be surely maintained even when the power is not applied, thereby ensuring operational reliability.

1 is a block diagram showing a preferred embodiment of the present invention

Figure 2 is a block diagram showing a plan view showing another embodiment to which the present invention is applied

3 and 4 is a front view of the operating state of the electric valve and the valve used in the present invention

◀ Explanation of symbols used in the main part of the drawing ▶

A: Electric valve B: Ignition switch

C: relay D: warning light

E: manual switch

1: parking brake 2: brake pedal

3: master cylinder 4: front wheel

5:

Rear wheels

6,6 ', 6 ": oil supply pipe

7: Airmaster 10: Motor

11: valve

1 is a block diagram showing a preferred embodiment of the present invention, Figure 2 is a block diagram showing a plan view showing another embodiment of the present invention, Figures 3 and 4 are front views showing the main action state, these Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

In the present invention, when the parking brake 1 is configured to brake according to whether the vehicle is started,

The parking brake 1 supplies high pressure brake oil from the master cylinder 3 to the front wheel 4 made of the disc brake and the rear wheel 5 made of the drum brake by stepping the brake pedal 2 which is the main braking device. The motor 10 is electrically driven on the oil supply pipes 6 and 6 'according to whether the motor 10 is driven so that forward and reverse rotation is possible through the shaft 10a of the motor 10 at the end of the shaft 10a. It characterized in that the electric valve (A) to be used so that the connected valve 11 can be controlled to open and close. Reference numeral 10b in the figure shows the housing.

Motor 10 constituting the electric valve (A) is electrically connected to the ignition switch (B) operated by the vehicle start key and the relay (C) connected to the ignition switch (B) by ignition when the ignition key is turned ON Operate by electricity supplied from switch (B) to open the oil supply pipes (6, 6 '), when starting off, close the oil supply pipes (6, 6'), and even if the start is turned off, the ignition switch The standby voltage is applied for a predetermined time by (B) and the relay (C) so that the closing operation of the electric valve (A) occurs.

And the parking brake (1) warning light (D) installed on the dashboard of the vehicle according to whether or not the operation of the electric valve (A) can be flickering operation, the driver manually on the dashboard of the car as needed, the electric valve (A) Install manual switch (E) such as button type or lever type to control the operation.

Warning light (D) and the manual switch (E) of the parking brake (1) can operate when the ignition switch (B) is ON, but the current does not flow when the ignition switch (B) is OFF, so the warning light ( D) does not turn on or the electric valve (A) cannot be controlled by the manual switch (E).

The electric valve (A) can be installed in various ways according to the supply distribution method of the brake oil to the brake device of the front and rear wheels (4, 5) in the master cylinder (3),

In the case of the front axle and the rear axle distribution type as shown in FIG. 1, since a drum brake is normally installed on the rear wheel 5, the oil supply pipe 6 'which supplies brake oil from the master cylinder 3 to the rear wheel 5 is in the middle. An oil supply pipe (6) for installing an electric valve (A) and supplying oil to the front wheel (4) or the rear wheel (5) in the case of X type distribution, triangular distribution type, 4-2 or 4-4 distribution type 6 ') Optionally installed on either or both oil supply pipes (6 or 6').

As shown in FIG. 2, both the front and

rear wheels

4 and 5 are doubled in braking force by using air in the case of a car or a large vehicle in which a drum brake is installed. In this case, an oil supply pipe 6 ″ in front of the air master 7 is provided. If only one electric valve (A) is installed in the front and rear wheels (4, 5) will be able to control the braking state.

The braking device installed on the front wheel 4 or the rear wheel 5 is a general disc brake or a drum brake, and a detailed description thereof is omitted.

In the figure, reference numeral 8 denotes a booster, and reference numeral 9 illustrates a push rod installed in the brake pedal 2.

The present invention can be configured as described above is an improved invention of the parking brake (1) to be made automatically according to whether the vehicle is started, braking is automatically made when the start is OFF, the braking state when the start is ON Is released, and the braking can be performed even when the starting state is turned on by a separate manual switch (E).

If you want to park the car, move the car to the parking position, press the brake pedal (2), which is the main braking device, to stop the car, switch the ignition key to the OFF direction, turn off the ignition completely, and get off. At this time, when parking on a slope or a rough road, the car rolls downhill and causes an accident. Therefore, the conventional parking brake must check the braking state or pull it when parking so that the car does not move arbitrarily.

However, according to the present invention, the parking brake 1 is automatically operated when the starter is turned off. When the vehicle is pulled out by stepping on the brake pedal 2, the push rod 9 and the booster 8 are applied to the brake oil in the master cylinder 3. Pressure is generated to supply oil to the caliper of the front wheel (4) disc brake or the wheel cylinder of the rear wheel (5) drum brake via the oil supply pipes (6, 6 ', 6 "), and to the pad or by the caliper or wheel cylinder. Braking is performed by generating contracting or expanding force in the brake shoe. When starting is turned off in this state, the standby voltage of the ignition switch (B) is transferred to the oil supply pipe (6, 6 ', 6 ") through the relay (C). It is supplied to the motor 10 of the electric valve (A) installed in the shaft 10a of the motor 10 is rotated in the forward direction while rotating the valve 11 in the state shown in Figure 3 to Figure 4 oil supply pipe (6, 6 ', 6 ") to prevent backflow of oil Been to keep the same state as it would be to act as a parking brake (1).

When the vehicle is started, when the vehicle is started, the ignition switch B is turned on while the current is supplied to the motor 10 of the electric valve A through the relay C so that the valve 11 is shown in FIG. The reverse rotation of the state 4 opens the oil supply pipe (6,6 ', 6 ") to the reverse flow of the brake oil occurs, the braking is released to drive the car.

In addition, when the vehicle is stopped, when the ignition switch (B) is turned on (when waiting for a stop light by a traffic light or stopping a car for a while), the vehicle is put on the brake pedal (2). Next, when the manual switch (E) is turned on, the parking brake (1) warning light (D) on the instrument panel lights up and the motor (10) of the electric valve (A) is operated to close the valve (11) while the master cylinder ( The

oil supply pipes

6, 6 ', 6 "are closed to prevent the oil supplied from 3) from flowing back to the master cylinder 3 again.

When starting again, when the manual switch (E) is turned off, the warning lamp (D) turns off and the valve (11) is opened by the motor (10) of the electric valve (A), and the oil supply pipe (6, 6 ', 6 ") As the oil in the caliper or the wheel cylinder flows back to the master cylinder 3 through), the braking state of the car is released and the vehicle starts.

According to the present invention, the parking brake 1 automatically operates according to whether the vehicle is started, and in the state of starting, the parking brake 1 is operated by a simple operation by installing a manual switch E of a button type or a lever type on a dashboard. It can be operated to provide convenience to the user, and because the mechanical manual parking brake is not installed in the car interior, it is possible to secure a larger indoor space.

Claims

In the parking brake (1) is made to automatically brake according to whether the vehicle is started;

The parking brake 1 is electrically connected and wired to an ignition switch B operated by an automobile ignition key, and an oil supply pipe piped between a master cylinder 3 and a braking device installed on front and rear wheels 4 and 5. An electric valve (A) which is electrically controlled on (6,6 ') and installed to control opening and closing of the oil supply pipe (6,6'),

The electric valve (A) is a motor 10,

It is connected to the shaft (10a) of the motor 10 is composed of a valve 11 for forward and reverse rotation to regulate the supply of oil,

A relay (C) electrically connected and wired to the ignition switch (B) connected to the electric valve (A),

Parking brake (1) warning light (D) installed on the dashboard of the vehicle and flashing according to the operation of the electric valve (A),

An electric parking brake for an automobile, comprising a manual switch (E) configured to manually control the operation of the electric valve (A) on the vehicle dashboard.