Invention Grant
- Patent Title: Dual gain clutch control system
- Patent Title (中): 双增益离合器控制系统
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Application No.: US12474338Application Date: 2009-05-29
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Publication No.: US08425378B2Publication Date: 2013-04-23
- Inventor: Vijay A. Neelakantan , Todd C. Schanz , Robert L. Moses , Bret M. Olson
- Applicant: Vijay A. Neelakantan , Todd C. Schanz , Robert L. Moses , Bret M. Olson
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Agency: Quinn Law Group, PLLC
- Main IPC: B60W10/00
- IPC: B60W10/00

Abstract:
An automatic transmission includes a control system for controlling a clutch of the transmission. The control system includes a first variable flow solenoid and a second variable flow solenoid, each in selective fluid communication with the clutch. The first variable force solenoid provides hydraulic fluid within a first pressure range of 0 and 1,000 kPa. The second variable force solenoid provides hydraulic fluid within a second pressure range of 0 and 2,000 kPa. A transmission controller sends an electrical signal having a current between the range of 0 and 1 amp to one of the first and second variable flow solenoids. The pressure output of each of the first and second variable force solenoids is a function of, within their respective first and second pressure ranges, the amplitude of the current of the electrical signal to provide two distinct power gains to the single clutch.
Public/Granted literature
- US20100304927A1 DUAL GAIN CLUTCH CONTROL SYSTEM Public/Granted day:2010-12-02
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