Patent · US Active

Method for monitoring an auxiliary pump for a hybrid powertrain

US8068966B2 · kind B2 · utility

5Cited by

12References

13Claims

0Family size

Assignees

GM GLOBAL TECHNOLOGY OPERATIONS LLC · US
Daimler AG · DE
Chrysler Group LLC · US
Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

Peter E. Wu · Brighton, US
Ali K. Naqvi · Anaheim, US
Rebecca Trierweiler · White Lake, US
Syed Naqi · Dearborn, US
Ryan D. Martini · Royal Oak, US

Key dates

Filing date	Oct 10, 2008
Grant date	Nov 29, 2011
Priority date	—
Expiry date	Jul 25, 2030

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/62
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A powertrain system includes a hybrid transmission coupled to an engine and an auxiliary hydraulic pump. The auxiliary hydraulic pump is commanded to operate at a predetermined speed only when enable criteria are met. An engine-off state is inhibited based upon a difference between a commanded speed and a monitored operating speed of the auxiliary hydraulic pump.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.