Invention Grant
- Patent Title: Method and apparatus to monitor devices of a hydraulic circuit of an electro-mechanical transmission
- Patent Title (中): 用于监测机电传动装置的液压回路的装置的方法和装置
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Application No.: US11626515Application Date: 2007-01-24
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Publication No.: US07670254B2Publication Date: 2010-03-02
- Inventor: Peter E. Wu , Thyagarajan Sadasiwan , Ronald L. Shemet
- Applicant: Peter E. Wu , Thyagarajan Sadasiwan , Ronald L. Shemet
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations, Inc.
- Current Assignee: GM Global Technology Operations, Inc.
- Current Assignee Address: US MI Detroit
- Main IPC: B60W10/02
- IPC: B60W10/02 ; G06G19/00
Abstract:
A method and an apparatus are provided to control operation of an electro-mechanical transmission device selectively operative in one of a plurality of fixed gear modes and two continuously variable modes. The method comprises controlling the flow control devices of the electro-hydraulic control circuit, and monitoring a plurality of pressure monitoring devices in the electro-hydraulic control circuit. A fault is identified in the electro-hydraulic control circuit when a signal output of one of the pressure monitoring devices does not correspond to an expected signal output for the pressure monitoring device after an elapsed time period.
Public/Granted literature
- US20080176709A1 METHOD AND APPARATUS TO MONITOR DEVICES OF A HYDRAULIC CIRCUIT OF AN ELECTRO-MECHANICAL TRANSMISSION Public/Granted day:2008-07-24
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