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Automatic parking brake with optimized re-tensioning method

A parking brake, re-tightening technology, applied in the direction of brakes, automatic starting devices, brake components, etc.

Active Publication Date: 2014-08-06
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this method has the disadvantage that the parking brake system must be in operation for a relatively long time

Method used

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  • Automatic parking brake with optimized re-tensioning method
  • Automatic parking brake with optimized re-tensioning method
  • Automatic parking brake with optimized re-tensioning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] exist figure 1 shows an electromechanical parking brake 1 for holding a vehicle at a standstill. The parking brake 1 includes a brake pawl 6 , which engages around a brake disc 9 in the form of a brake caliper. An electric motor 2 , which drives a parking brake mechanism 4 , is fastened to the brake dog 6 . exist figure 1 The brake shown in is used simultaneously as a hydraulic drive brake and as a parking brake for holding the vehicle at a standstill.

[0024] The parking brake mechanism 4 includes a main shaft 8 , which is rotationally driven by the electric motor 2 via a reduction transmission 3 . Arranged on the threaded spindle 8 in a rotationally fixed manner is a component designed as a spindle nut 7 which, when the threaded spindle 8 is turned, either in the direction of application Z of the brake or in the direction of release L move axially. The threaded spindle 8 and the spindle nut 7 are arranged in this case inside a brake piston 5 , on the side of the...

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PUM

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Abstract

The invention relates to a method for re-tensioning an automatic parking brake (1) by an electric motor. It is suggested that a re-tensioning process is carried out after a predefined time period after the tensioning of the parking brake. A parking brake mechanism (4) is driven in the tensioning direction by an electric motor (2) to determine the travel carried out by the parking brake mechanism (4) in the tensioning direction (Z) and the clamping force (F) exerted by the parking mechanism (4) during the re-tensioning. The method further includes carrying out a further re-tensioning process after a predefined time if the travel (s) of the parking mechanism (4) is less than a predefined threshold value and the clamping force in the parking brake is less than a second threshold value. If the travel (s) of the parking brake mechanism (4) is greater than a third threshold value or the clamping force exerted by the parking brake is greater than a fourth threshold value, a further re-tensioning process is not carried out.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for reapplying an automatic parking brake by means of an electric motor, a control device with a reapplying algorithm and a device with A special retensioning method for the vehicle's automatic parking brake. Background technique [0002] Automatic parking brakes or parking brakes (APB) usually include an operating element, for example a keypad, with which the parking brake can be locked or released. When the operating element is actuated, the control unit connected to it recognizes the parking brake requirement and accordingly activates a servomechanism, for example an electric motor, in order to build up a braking force on the parking brake or to release the brake. move. [0003] Various parking brake systems are known from the prior art, including systems in which the electric motor (with a transmission) is located directly on the wheel brakes. This configuration is also calle...

Claims

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Application Information

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IPC IPC(8): B60T7/12
CPCB60T7/12B60T13/588B60T13/741B60T2270/606B60T11/046B60T13/746
Inventor F.贝尔勒-米勒D.布拉泰特
Owner ROBERT BOSCH GMBH