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EP0310113A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Device for testing brake fluid pressure circuit in anti-lock control system

Assignee: Sumitomo Electric Industries Ltd
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Filing: 1988-09-30
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Granted: —
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Expires: 2008-09-30
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Abstract

Abstract A device for testing a brake fluid pressure circuit in an antilock control system for a motor vehicle. This device has a pressure switch provided in the line between a pump and a pressure accumulator in the brake fluid pressure circuit and a pressure switch detector adapted to give ON signals after the pressure indication of the pressure switch has risen above a predetermined point and give OFF signals after it has decreased below a predetermined point. If the signals fail to change from ON to OFF within a given time after issuing a command to release the pressure in the accumulator and if they fail to change from OFF to ON within a given time after issuing a command to pressurize the accumulator, the circuit is judged to be in an abnormal state.

Inventors

  • 👤 Masato C/O Itami Works Of Sumitomo Yoshino

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-27 14:47
CPC Classifications
G; G01; G01L; G01L7/00; G01L7/16; F; F15; F15B; F15B19/00; F15B19/005; B; B60; B60T; B60T8/00; B60T8/32; B60T8/34; B60T8/42; B60T8/4208; B60T8/4225; B60T8/88; B60T8/90; B60T8/92; B60T8/94; G01M; G01M13/00; G01M13/003; Y; Y10; Y10S; Y10S303/00; Y10S303/02; Y10S303/03; Y10S303/04

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 142 words
A device for testing a brake fluid pressure circuit in an antilock control system for a motor vehicle, comprising a pressure switch provided in a line between a pump and a pressure accumulator in said brake fluid pressure circuit; a pressure switch detector means adapted to give ON signals after the pressure indication of said pressure switch has risen above a predetermined point and OFF signals after the pressure indication has decreased below a predetermined point; and means for judging whether or not the signals supplied from said detector means have changed from ON to OFF within a predetermined period of time after issuing a command to release the pressure in said pressure accumulator and whether or not said signals have changed from OFF to ON within a predetermined period of time after issuing a command to store pressure to said accumulator.
Claim 2
Independent Claim 142 words
A device for testing a brake fluid pressure circuit in an antilock control system for a motor vehicle, comprising a pressure switch provided in a line between a pump and a pressure accumulator in said brake fluid pressure circuit; a pressure switch detector means adapted to give ON signals after the pressure indication of said pressure switch has risen above a predetermined point and OFF signals after the pressure indication has decreased below a predetermined point; and means for judging whether or not the signals supplied from said detector means have changed from ON to OFF within a predetermined period of time after issuing a command to release the pressure in said pressure accumulator and whether or not said signals have changed from OFF to ON within a predetermined period of time after issuing a command to store pressure to said accumulator.

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