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Parking brake control device

A technology of braking control and braking device, applied in the direction of automatic starting device, brake, brake actuator, etc., can solve the problems of inability to ensure braking force, inability to release parking brake, inability to release, etc.

Inactive Publication Date: 2011-07-27
ADVICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, there may be problems such as failure to secure the required braking force on an inclined road, or failure to release the parking brake because the motor does not operate even when the parking brake is intended to be released after parking with the parking brake. and cannot be released because a pressure equal to the wheel cylinder (hereinafter referred to as "W / C") pressure generated when locking occurs cannot be applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0037] The first embodiment of the present invention will be described below. This embodiment uses a vehicle brake system as an example in which a disc brake EPB is applied to the rear wheels. figure 1 It is a schematic diagram showing the outline of a vehicle brake system to which the parking brake control device according to the present embodiment is applied. figure 2 It is a schematic cross-sectional view of the rear wheel brake mechanism provided in the brake system. The present embodiment is described below with reference to the drawings.

[0038] Such as figure 1 As shown in the brake system, the brake system is provided with a service brake 1 and EPB 2. The service brake 1 is equivalent to a second braking device that generates braking force based on the driver's pedal force, and EPB 2 is equivalent to restricting the movement of the vehicle when the vehicle is stopped The first braking device.

[0039] For the service brake 1, the servo unit 4 doubles the pedal force corr...

no. 2 example

[0099] Now, the second embodiment of the present invention will be explained. In this embodiment, the lock control and release control are improved from the lock control and release control in the first embodiment. However, other aspects of this embodiment are the same as the first embodiment, so only the differences from the first embodiment will be described below.

[0100] In this embodiment, an improved method of issuing a brake pedal depression request to the driver based on the faulty part of the ESC is used to perform lock control and release control.

[0101] Picture 12 It is a flowchart showing the details of the lock control processing according to the present embodiment. Such as Picture 12 As shown in, basically, the process is the same as the above Figure 4 The lock control process shown in is the same. However, in step 210a, it is judged whether it is impossible to use the W / C pressurization function of the automatic pressurization function of the actuator 7, inst...

no. 3 example

[0109] Now, the third embodiment of the present invention will be explained. In this embodiment, the lock control and release control are improved from the lock control and release control in the first embodiment. However, other aspects of this embodiment are the same as the first embodiment, so only the differences from the first embodiment will be described below.

[0110] In this embodiment, the lock control and release control are performed by using an improvement in issuing a brake pedal depression request to the driver depending on the required depression amount.

[0111] Figure 14 It is a flowchart showing the details of the lock control processing according to the present embodiment. In this embodiment, as Figure 14 As shown in the above, basically the process is the same as the above Figure 4 The lock control process shown in is the same. However, in steps 220a-220c, the processing when the ESC fails is improved.

[0112] More specifically, if an affirmative determinat...

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PUM

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Abstract

Disclosed is a parking brake control device with which the necessary braking force can be ensured and be released reliably even when an automatic pressurization function, which can increase the W / C pressure regardless of brake pedal operation, is malfunctioning. If an ESC is malfunctioning during locking control or release control for a parking brake, a request to press a brake pedal is sent to the driver. Therefore, while the ESC is malfunctioning - that is, when the automatic pressurization function of a service brake is malfunctioning - the W / C pressure can be increased because the driver presses on the brake pedal. Thus, the required braking force can be ensured during locking control and can be released reliably during release control.

Description

Technical field [0001] The present invention relates to a parking brake control device that performs lock control on an electronic parking brake (hereinafter referred to as "EPB"). Background technique [0002] In the prior art, the parking brake is used to restrict the movement of the vehicle when parking. Examples of such parking brakes include manual parking brakes or electronic parking brakes. In manual parking brakes, an operating lever is used to pull the brake cable to transmit operating force to the brake mechanism. In electronic parking brakes, The cable is pulled using the rotational force of the motor to transmit the rotational force of the motor to the braking mechanism. [0003] In the electronic parking brake or EPB, in order to lock the EPB, the motor turns to the locked side (forward rotation) and the motor rotation force is transmitted to the brake mechanism (actuator). At the same time, when the braking force is generated, the motor drive is stopped. To release...

Claims

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Application Information

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IPC IPC(8): B60T17/22B60T7/12
CPCB60T7/12B60T13/741B60T13/662F16D2125/40F16D65/18F16D2123/00F16D2121/02F16D2121/24B60T13/588F16D2125/48
Inventor 渡边多佳志洼川淳一安井和彦
Owner ADVICS CO LTD
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