Patent · US Active

Method and apparatus to monitor rotational speeds in an electro-mechanical transmission

US8281885B2 · kind B2 · utility

3Cited by

14References

7Claims

0Family size

Assignees

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

Inventors

Andrew M. Zettel · Ann Arbor, US
Charles J. Van Horn · Novi, US
Peter E. Wu · Brighton, US
Ryan D. Martini · Royal Oak, US
Anthony H. Heap · Ann Arbor, US

Key dates

Filing date	Sep 18, 2008
Grant date	Oct 9, 2012
Priority date	—
Expiry date	Aug 10, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/64
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A powertrain includes an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and an electric machine to selectively transmit mechanical power to an output member. Powertrain operation includes monitoring operator inputs, and determining input speeds and changes in input speeds for the internal combustion engine and the electric machine. The input speeds are compared to threshold input speeds, and the changes in input speeds are compared to threshold changes in input speeds. Input torques of the internal combustion engine and the electric machine are reduced when any one of the input speeds and changes in input speeds exceeds the corresponding threshold.

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