KR19980083910A - Brake Locking Device and Method - Google Patents

Abstract

The present invention relates to a brake locking device and method, and in particular, a starter for supplying battery power by intermittent start switch; Automatic mode selection switch; A vehicle speed sensor for detecting a driving speed of the vehicle; A controller configured to receive a vehicle speed signal from the vehicle speed sensor and generate a control signal for locking or releasing the brake in response to the selection signal of the automatic mode selection switch; A switching unit configured to switch in response to a control signal generated from the control unit to form a current path for supplying a current provided from the starting unit; An instruction unit coupled to an output end of the starting unit and the switching unit to indicate an abnormality of the brake lock; And an operating unit coupled to an output end of the switching unit and the indicating unit and operating a brake locking by hydraulic pressure in accordance with a supply current of the switching unit.

Accordingly, the present invention provides an electronically controllable brake lock system which locks the brakes by vehicle speed detection in an automatic mode and releases the brake locks by acceleration detection, thereby allowing the vehicle to be pushed up and downhill and restarting. There is an effect that can be effectively prevented.

Description

Brake Locking Device and Method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brake locking device and method, and more particularly, to a brake locking device and a method capable of preventing a vehicle from moving uphill and downhill by electronically controlling braking of a brake according to vehicle speed detection in an automatic mode. will be

In general, the brake and the parking lever, that is, the side lever are used in parallel in order to prevent the rolling phenomenon caused by the load and the inertia of the vehicle when the vehicle is stopped on the uphill and the downhill.

According to the prior art, manipulating the parking lever to lock or release the parking brake (hand brake) when stopping or starting on an uphill road requires considerable force on the driver. Therefore, when the vehicle is congested for a long time, the driver easily feels tired and hassle.

To solve this inconvenience, when the parking lever is pulled more than a certain degree, the switch operates to supply hydraulic pressure to the cylinder to bend the rear wheel to operate the brake, thereby inventing a brake lock system that can prevent the vehicle from rolling. Introduced in -15691.

1 is a block diagram illustrating a conventional improved brake lock system. As shown in FIG. 1, the operation preparation unit 10, the operation unit 20, the indicator unit 30, and the operation unit 40 are largely illustrated. It is composed.

The operation preparation unit 10 is supplied from the power supply 11 by the operation of the power relay 13 and the power relay 13, which is operated by the alarm of the key switch 12 to which the power supply 11 of the vehicle is connected. It is composed of an operation ready switch 14 to supply / block current to the operation unit 20 and the indicator unit 30.

The operation unit 20 is connected to the known parking lamp 22 and the parking switch 23 and the operation preparation switch 14 of the operation preparation unit 10 connected to the power relay 13 of the operation preparation unit 10 described above. One end is connected, the other end is connected to the indicator 30 and the operation unit 40 is operated by opening and closing of the micro switch 24 and the micro switch 24 to be operated by pulling the parking lever 21 over a certain degree. It is composed of a control unit relay 25.

The indication unit 30 is opened by opening and closing the operation preparation instruction lamp 31 which is operated by opening and closing the operation preparation switch 14 of the operation preparation unit 10 and the input switch 41 of the operation unit 40 to be described later. It is composed of a normal operation lamp 33 operated by the opening and closing of the indicator relay 32 and the indicator relay 32 to be activated and a warning buzzer 35 operated by opening and closing of the pressure switch 41.

In addition, the operation unit 40 is composed of a magnetic valve 43, a double check valve (Double check valve) and a relay valve 46, the magnetic valve 43 is the opening and closing of the micro switch 24 of the operation unit 20 By operation, the air of the air tank 42 is supplied to / off from the air booster 48 through the double surge valve 44 and the relay valve 46.

The pressure switch 41 is attached between the air tank 42 and the double book valve 44 in which the magnetic valve 43 is installed, and in detail, is attached to the air pipe 45 flowing into the double book valve 44 to pressurize the air. When it falls below this certain level, it is operated to operate the relay 32 of the indicator unit 30.

In order to operate the brake lock system according to the improved conventional technique, first, when the key switch 12 of the vehicle is turned on, the power relay 13 is operated to supply the power 11 to the operation preparation switch 14. When the operation preparation switch 14 is turned on and the parking lever 21 is pulled over a certain degree, the micro switch 24 is turned on to operate the operation unit relay 25. At this time, the magnetic valve 43 of the operation unit 40 is activated. Will be opened.

At this time, the air in the air tank 42 actuates the relay valve 45 in front of the air booster 48 via the double surge valve 44 to generate hydraulic pressure in the same way as the main brake is applied. The braking state is maintained by supplying to the wheel cylinder 49.

On the other hand, when the parking lever 21 is released to release the braking state, the micro switch 24 is turned off to close the magnetic valve 43, and the air of the relay valve 46 opens the outlet of the magnetic valve 43. By being released to the atmosphere through, the hydraulic pressure generated in the wheel cylinder 49 of the rear wheel is dropped and the braking is released.

As described above, in the prior art, when the parking lever is pulled up or down at a stop for a certain degree, the air of the air tank is sent to the air booster through the double-screw valve, and the corresponding hydraulic pressure is supplied to the wheel cylinder of the rear wheel. While there is an effect that it is possible to maintain a certain braking state, the inconvenience is that the parking lever must be operated at each stop.

SUMMARY OF THE INVENTION An object of the present invention is to provide a brake locking device and a method which can prevent the vehicle from driving uphill and downhill by electronically controlling braking of a brake according to vehicle speed detection in an automatic mode in order to solve the above problems. There is.

In order to achieve the above object, the device of the present invention comprises a starter for supplying battery power by the interruption of the starter switch; Automatic mode selection switch; A vehicle speed sensor for detecting a driving speed of the vehicle; A controller configured to receive a vehicle speed signal from the vehicle speed sensor and generate a control signal for locking or releasing the brake in response to the selection signal of the automatic mode selection switch; A switching unit configured to switch in response to a control signal generated from the control unit to form a current path for supplying a current provided from the starting unit; An instruction unit coupled to an output end of the starting unit and the switching unit to indicate an abnormality of the brake lock; And an operating unit coupled to an output end of the switching unit and the indicating unit and operating a brake locking by hydraulic pressure in accordance with a supply current of the switching unit.

The method of the present invention to achieve the above object comprises the steps of turning on the start switch; Determining whether the automatic mode selection switch is on after the start switch is turned on; Detecting a vehicle speed when the automatic mode selection switch is turned on as a result of the determination in the automatic mode selection switch determination step; Determining whether the vehicle speed detected in the vehicle speed detection step coincides with zero; Turning on first and second switches of the switching unit when the vehicle speed coincides with zero as a result of the vehicle speed determination; Locking the parking brake by hydraulic pressure by turning on the first and second switches; Detecting a vehicle speed after the locking step; Determining whether the acceleration detected in the vehicle speed detecting step is greater than or equal to zero; And releasing the brake lock by turning off the first and second switches of the switching unit when the acceleration is zero or more as a result of the vehicle speed determination.

1 is a configuration diagram for explaining a conventional brake locking device.

2 is a block diagram illustrating a brake locking device according to an embodiment of the present invention.

3 is a flow chart for explaining a brake locking method according to an embodiment of the present invention.

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

FIG. 2 is a block diagram illustrating a brake locking device according to an embodiment of the present invention. As shown in FIG. 2, a starter 10 for supplying battery power 11 by an interruption of a starter switch, and automatic In response to the selection signal by the mode selection switch 20, the vehicle speed sensor 40 for detecting the traveling speed of the vehicle, and the automatic mode selection switch 20, the vehicle speed signal is supplied from the vehicle speed sensor to lock the brake, The control unit 60 for generating a control signal for releasing and the switching unit 80 for forming a current path for supplying the current provided from the starter 10 by switching in response to the control signal generated from the control unit 60 ) Is coupled to the output terminal of the starter 10 and the switching unit 80 to indicate an abnormality of the brake lock, and is coupled to the output terminal of the switching unit 80 and the indicating unit 100, and the switching unit. Depending on the supply current of 80 It consists of an operating unit 120 for operating the brake locking by the hydraulic pressure.

The starter 10 includes a starter switch 12 having one end connected to the battery 11 and a starter switch 12 to supply current from the battery 11 to the switching unit 100 and the indicator unit 120. It is composed of a power relay 14 that is opened and closed in accordance with the interruption.

One end of the switching unit 80 is connected to an output terminal of the starting unit 10, and the first switch 81 and an output terminal of the starting unit 10 are switched in response to a control signal generated from the control unit 60. One end is connected to the relay 82 is opened and closed by the switching of the first switch 81, the second switch 84 is connected to the ground and the one end is switched in response to the control signal, the relay 82 ) And a first diode (D1) connected between the other end of the second switch 84, a second diode (D2), one end of which is connected to the other end of the second switching unit, and an output end of the starter (10) It is composed of a parking lamp 86 connected between the two diodes D2 and instructing the driving state by the interruption of the relay 82.

Referring to the overall operation of the preferred embodiment configured as described above with reference to the flow chart of FIG.

Referring to Fig. 2, in one embodiment of the present invention, in order to operate the brake locking device, the start switch must first be on (step 100). In this state, the power relay 14 is interrupted to supply the current supplied from the battery to each of the switching unit 80 and the indicating unit 100.

Then, the automatic mode selection switch 20 may be turned on. Next, the controller 80 determines whether the automatic mode selection switch 20 is turned on (step 101).

As a result of the determination of step 101, when the automatic mode selection switch 20 is not turned on, the operation state of the automatic mode selection switch 20 is continuously checked, while the automatic mode selection switch 20 is turned on. The vehicle speed sensor 40 detects the rotation of the transmission output shaft and supplies the detected pulse signal to the controller 60. Then, the controller 80 calculates the current vehicle speed v _S based on the pulse signal (step 102).

From the vehicle speed v _S calculated in step 102, the controller 60 determines whether the vehicle speed v _S matches zero (step 104). If the condition v _S = 0 is not satisfied in the vehicle speed determination step, steps 102 and 104 are repeatedly performed until the vehicle speed is detected and the condition v _S = 0 is satisfied.

On the other hand, when the condition v _S = 0 in the vehicle speed determining step is satisfied, the controller 60 generates a locking signal as a control signal to the switching unit 80, and the locking signal is the first signal of the switching unit 80. And second switches 81 and 84 at the same time. As a result, the relay 82 operates to provide the operating unit 120 with the current supplied from the starting unit 10. Therefore, hydraulic pressure is supplied to the wheel cylinder of the operation unit 120 to lock the brake (step 108). At this time, the parking lamp 86 of the switching unit 80 is also energized to inform the driver of the parking state.

The steps to be involved in the brake locking operation will be to release the brake locking. Therefore, the brake unlocking is described as follows.

When the driver presses the accelerator pedal to release the brake lock, the vehicle speed is accelerated, and the vehicle speed sensor 40 detects the changed vehicle speed v _S as described above and provides a pulse signal to the controller 60 (the second step). Step 110).

After step 110, the controller 60 determines whether the vehicle speed v _S is equal to or greater than zero (step 112).

As determined in the first step 112, the condition v, if not satisfy _S 0, the condition v until satisfy _S 0 performs the step of claim 106 and a step 112 to repeatedly and, on the other hand, the condition v _S 0 satisfy the In this case, the first and second switches 81 and 84 of the switching unit 80 are simultaneously turned off. As a result, the current provided to the actuating part 120 is cut off and the brake locking is released.

Accordingly, as described above, the present invention provides an electronically controllable brake lock system which locks the brake by vehicle speed detection in the automatic mode and releases the brake lock by acceleration detection, thereby stopping and re-starting a vehicle uphill and downhill. It is possible to more effectively prevent the jungle, thereby improving the safety of the vehicle and the driver's convenience.

Claims (4)

A starting unit for supplying battery power by interrupting the starting switch; Automatic mode selection switch; A vehicle speed sensor for detecting a driving speed of the vehicle; A controller configured to receive a vehicle speed signal from the vehicle speed sensor and generate a control signal for locking or releasing the brake in response to the selection signal of the automatic mode selection switch; A switching unit which forms a current path for supplying a current provided from the starting unit by switching in response to a control signal generated from the control unit; An instruction unit coupled to an output end of the starting unit and the switching unit to indicate an abnormality of the brake lock; And an operation unit coupled to an output end of the switching unit and the indicator unit, the operation unit for operating brake locking by hydraulic pressure in accordance with a supply current of the switching unit. According to claim 1, wherein the switching unit is connected to the output terminal of the one end, the first switch is switched in response to the control signal generated from the control unit, and the one end is connected to the output terminal of the starter, A relay enclosed by the switching of the first switch, a second switch having one end connected to ground and switched in response to the control signal, a first diode connected between the relay and the other end of the second switch, A second diode having one end connected to the other end of the second switching unit, and a parking lamp connected between the output end of the starting unit and the second diode and indicating a driving state by the interruption of the relay. Brake locking device. 3. The method of claim 2, wherein the first and second switches are switched when the vehicle speed signal by the vehicle speed sensor is zero to lock the brake, and when the vehicle speed signal by the vehicle speed sensor is greater than or equal to zero to release the brake lock. Brake locking device, characterized in that the switch. Turning on the start switch; Determining whether the automatic mode selection switch is on after the start switch is turned on; Detecting a vehicle speed when the automatic mode selection switch is turned on as a result of the determination in the automatic mode selection switch determination step; Determining whether the vehicle speed detected in the vehicle speed detection step coincides with zero; Turning on first and second switches of the switching unit when the vehicle speed coincides with zero as a result of the vehicle speed determination; Locking the parking brake by hydraulic pressure by turning on the first and second switches; Detecting a vehicle speed after the locking step; Determining whether the acceleration detected in the vehicle speed detecting step is greater than or equal to zero; And releasing the brake locking by turning off the first and second switches of the switching unit when the acceleration is zero or more as a result of the vehicle speed determination.