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:
May. 15, 2012
Filed:
May. 13, 2008
Applicants:
Zhong Wang, Westland, MI (US);
Tony T. Hoang, Warren, MI (US);
Lan Wang, Troy, MI (US);
Wenbo Wang, Novi, MI (US);
Margaret C. Richards, Royal Oak, MI (US);
Daryl a Wilson, Ypsilanti, MI (US);
Inventors:
Zhong Wang, Westland, MI (US);
Tony T. Hoang, Warren, MI (US);
Lan Wang, Troy, MI (US);
Wenbo Wang, Novi, MI (US);
Margaret C. Richards, Royal Oak, MI (US);
Daryl A Wilson, Ypsilanti, MI (US);
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T 8/88 (2006.01);
U.S. Cl.
CPC ...
Abstract
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.