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:
Aug. 19, 2014
Filed:
Nov. 29, 2012
GM Global Technology Operations Llc, Detroit, MI (US);
Kevin P Houle, Flint, MI (US);
Jean Marie Miller, Plymouth, MI (US);
Valerie Zelko Byrd, Royal Oak, MI (US);
Kathryn E Mulligan, Farmington Hills, MI (US);
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A hybrid vehicle powertrain including a hybrid transmission in power-flow communication with an electric traction motor, a fluid pump, and a flow controller electrically connected to the fluid pump. The fluid pump is configured to supply fluid at an adjustable fluid flow rate to the hybrid transmission and the electric traction motor in response to a command from the flow controller. The flow controller is electrically connected to the fluid pump and configured to controllably modulate the operating speed of the fluid pump to adjust the fluid flow rate. If the difference between an expected rate of speed change of the fluid pump and the actual rate of speed change exceeds a threshold, the flow controller may limit the total amount of electrical power supplied to the electric traction motor.