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:
Apr. 07, 2009
Filed:
Sep. 23, 2005
Goro Tamai, West Bloomfield, MI (US);
Birendra P. Bhattarai, Novi, MI (US);
Tony T. Hoang, Warren, MI (US);
Goro Tamai, West Bloomfield, MI (US);
Birendra P. Bhattarai, Novi, MI (US);
Tony T. Hoang, Warren, MI (US);
GM Global Technology Operations, Inc., Detroit, MI (US);
Abstract
An anti-rollback vehicle control system reduces vehicle rollback by restarting an engine based on a grade, a brake signal, and a calculated brake release rate. In a hybrid vehicle, the control system restarts the vehicle engine and electric motor. In a conventional powertrain vehicle that utilizes a transmission with a neutral-idle mode, the control system directs the transmission to exit neutral-idle mode. The grade may be estimated based on a vehicle acceleration rate, a vehicle driving force, and resistance factors.