Invention Grant
- Patent Title: Pressure assisted park servo
- Patent Title (中): 压力辅助驻车伺服
-
Application No.: US12029765Application Date: 2008-02-12
-
Publication No.: US08012063B2Publication Date: 2011-09-06
- Inventor: Stephen W. Powell , Mark A. Vernacchia , Brian W. Whitmarsh , Ryan M. Jenness
- Applicant: Stephen W. Powell , Mark A. Vernacchia , Brian W. Whitmarsh , Ryan M. Jenness
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: B60T11/10
- IPC: B60T11/10 ; B60T13/00 ; B60W10/06 ; F16H31/00 ; F16H59/00
Abstract:
A pressure assisted park servo assembly for an automatic transmission includes a servo or spool valve which receives pressurized hydraulic fluid from various sources including two solenoid valves and transmission ports. The servo valve controls two flows of pressurized hydraulic fluid to a servo assembly to place the transmission in or release it from park. The improved park servo assembly exhibits enhanced operating speed.
Public/Granted literature
- US20080214350A1 PRESSURE ASSISTED PARK SERVO Public/Granted day:2008-09-04
Information query
