Braking booster system leak diagnostics

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 ena...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WILSON DARYL A, WANG WENBO, RICHARDS MARGARET C, WANG ZHONG, WANG LAN, HOANG TONY T
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung: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.