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:
Jan. 11, 2005
Filed:
Jun. 05, 2002
Rongjun Zhang, Santa Rosa, CA (US);
Mark Leonard Hopper, Ypsilanti, MI (US);
Stephen DE LA Salle, Danbury Essex, GB;
Rongjun Zhang, Santa Rosa, CA (US);
Mark Leonard Hopper, Ypsilanti, MI (US);
Stephen De La Salle, Danbury Essex, GB;
Visteon Global Technologies, Inc., Dearborn, MI (US);
Abstract
A control system is disclosed for minimizing the driveline vibrations in a hybrid electric vehicle during engine engagement. The control system involves determining the speed of the electric motor and taking the derivative of the speed to determine the acceleration. A signal representing the acceleration is created. The acceleration signal is filtered. The filtered acceleration signal is used to calculate a feedback control term through a controller. The controller can be either a PD controller or a PID controller with a low integral gain. The feedback control term is used to adjust the output torque of the electric motor to suppress the vibrations caused by engine engagement.