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Braking booster system leak diagnostics

A technology of a brake booster and a diagnostic system, applied in the field of vehicle systems

Active Publication Date: 2011-09-07
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This vacuum is exhausted when the driver adjusts the brake pedal

Method used

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  • Braking booster system leak diagnostics
  • Braking booster system leak diagnostics
  • Braking booster system leak diagnostics

Examples

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Embodiment Construction

[0037] The following description is merely exemplary in nature and is in no way intended to limit the invention, its application or uses. For purposes of clarity, the same reference numbers will be used in the drawings to identify similar elements. As used herein, the term "at least one of A, B, and C" should be construed as a logical (A or B or C) using a non-exclusive logical or. It should be understood that steps within a method may be executed in different order without altering the principles of the present invention.

[0038] As used herein, the term "module" refers to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (common, dedicated, or group) and memory that executes one or more software or firmware programs, combinational logic circuits, and / or other suitable components that provide the above functions.

[0039] A brake booster system of a vehicle includes a brake booster that receives vacuum (ie, brake booster vacuum) from th...

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PUM

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Abstract

The present invention relates to a braking booster system leak diagnostics. A leak diagnostic system for a vehicle comprises a calculation module and a diagnostic enabling module. The calculation module calculates a decay rate of a brake booster vacuum. The diagnostic enabling module selectively enables the decay rate calculation based on mass airflow (MAF) into an engine and engine vacuum.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 049859, filed May 2, 2008. The disclosure of this application is incorporated herein by reference. [0003] This application is related to US Patent Application No. 12 / 013676, filed January 14, 2008. The entire disclosure of this application is incorporated herein by reference. technical field [0004] The present invention relates to vehicle systems, in particular to braking systems. Background technique [0005] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work by the named inventors of the invention described in this Background section and aspects of that description that were not admitted to be prior art at the time of filing the application are neither expressly nor implicitly deemed to be inconsistent with the present invention current technology. [0006] A hybrid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60T17/22B60T13/46
CPCB60T8/885B60W2540/12B60T2270/406B60W10/06B60T13/52B60K6/48B60T17/221Y02T10/6221B60W20/00Y02T10/62B60W20/50
Inventor Z·王T·T·洪L·王W·王M·C·理查兹D·A·威尔逊
Owner GM GLOBAL TECH OPERATIONS LLC