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Title: Method for use of hydraulically or electrically controlled solenoids under failed on conditions

A method to operate a clutch device in an electro-mechanical transmission mechanically-operatively coupled to an internal combustion engine and at least one electric machine includes, in response to a failure condition detected within a flow control device configured to facilitate flow of hydraulic fluid for operating the clutch device, selectively preventing the flow of hydraulic fluid from entering the flow control device and feeding the clutch device. Synchronization of the clutch device is initiated when the clutch device is intended for activation, and only if the clutch device is synchronized, the flow of hydraulic fluid is selectively permitted to enter the flow control device to activate the clutch device.
Authors:
;
Publication Date:
OSTI Identifier:
1143644
Report Number(s):
8,771,137
13/534,345
DOE Contract Number:
FC26-08NT04386
Resource Type:
Patent
Research Org:
GM Global Technology Operations LLC, Detroit, MI (USA)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING