The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 02, 2014
Filed:
Jan. 14, 2008
Zhong Wang, Westland, MI (US);
Tony T. Hoang, Warren, MI (US);
Daryl A. Wilson, Ypsilanti, MI (US);
Margaret C. Richards, Royal Oak, MI (US);
Lan Wang, Troy, MI (US);
Zhong Wang, Westland, MI (US);
Tony T. Hoang, Warren, MI (US);
Daryl A. Wilson, Ypsilanti, MI (US);
Margaret C. Richards, Royal Oak, MI (US);
Lan Wang, Troy, MI (US);
Abstract
A control system for evaluating a brake booster system includes an engine evaluation module that detects an engine off condition. A pressure evaluation module, during the engine off condition, monitors hydraulic brake line pressure, detects a change in brake booster pressure, and determines a brake booster vacuum decay rate based on the change in brake booster pressure. A fault reporting module detects a brake booster system fault based on the brake line pressure and the brake booster vacuum decay rate.