Method and device for monitoring brake lining wear and air clearance of an operating brake in motor vehicles

A technology of service brakes and brake linings, applied in the direction of brake type, axial brake, brake safety system, etc., can solve the problem of unrecognizable brake unintentional feeding, incompatibility, etc.

Inactive Publication Date: 2012-11-14
MAN NUTZFAHRZEUGE AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is not suitable for being able to determine faults on brakes and brake systems
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Method used

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  • Method and device for monitoring brake lining wear and air clearance of an operating brake in motor vehicles

Examples

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Embodiment Construction

[0013] 10 in the drawing indicates a brake caliper, which forms part of a disc brake of a wheel of a motor vehicle and whose brake linings 12 , 14 with the lining carrier pass through the not shown of the service brake of the motor vehicle. The feed unit can be pressed against a brake disc 16 (only partly shown). The brake caliper 10 may be of a known construction type and is shown and described only as necessary for the understanding of the invention.

[0014] A linear displacement sensor 18 is integrated into the brake caliper 10 , which is functionally connected with its housing 18 a on the one hand to the feed device or hydraulic piston (not visible) and on the other hand with its measuring probe 18 b to the brake caliper. At the housing 10a of the movable caliper 10 and with an actuated service brake, it detects the changed position of the feed device relative to the housing 10a of the brake caliper 10 as signal value a.

[0015] In the case of an unactuated service brak...

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Abstract

The invention refers to a method and device for monitoring brake lining wear and air clearance of an operating brake in motor vehicles, especially in commercial vehicles. Each wheel brake is provided with at least one displacement transducer which marks brake lining wear and air gap of service brake by means of an evaluation unit. A warning indicator is activated, when the detected air gap is larger or smaller than the predetermined air gap. According to the utility model, the displacement transducer and the evaluation unit are designed to obtain a current gap as an actual gap according to evaluation of signal difference of the displacement transducer under the case of controlling or not controlling the brake so as to obtain each difference between a gap and a rated gap, wherein the warning signal is activated when limits obtained by a specified rated gap exceed or the gaps is too large accordingly and when limits obtained by a specified rated gap is lower or the gaps is too small or no gap exists accordingly.

Description

technical field [0001] The invention relates to a method according to the preamble of patent claim 1 for monitoring play and brake lining wear of service brakes in motor vehicles, in particular commercial vehicles. Furthermore, the invention relates to a device for monitoring play and brake lining wear of a service brake in a motor vehicle, in particular in a commercial vehicle, according to the preamble of patent claim 7 . Background technique [0002] Document DE 42 12 407 A1 describes a method of this type and a device of this type for a compressed-air operated service brake of a motor vehicle, according to which it is connected via each wheel into the brake actuation chain (Bremsbetaetigungskette) The rotary potentiometer and the electronic evaluation unit determine on the one hand the brake lining thickness (wear index) and on the other hand determine the current air gap by evaluating the output signal of the rotational angle sensor of the readjustment device. In parti...

Claims

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Application Information

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IPC IPC(8): F16D66/00B60T17/22
CPCF16D66/023F16D2125/40F16D2066/003F16D55/225F16D66/02F16D2121/24
Inventor T·维特曼S·韦尔纳
Owner MAN NUTZFAHRZEUGE AG
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