ELECTRO-HYDRAULIC FAILURE RECOVERY CONTROL FOR DUAL CLUTCH TRANSMISSION

摘要

A control for a multi-speed automatic vehicle transmission includes electrical and hydraulic components, such as pressure control valve systems in fluid communication with shift valves and electrohydraulic actuators. The control includes electrohydraulic features configured to enable the transmission to respond to an electrical failure whether the transmission is in neutral, a reverse range, or one of a plurality of forward ranges.

主权项

1. An electro-hydraulic control for an automatic dual-clutch transmission, comprising
a plurality of shift valves, each shift valve being configured to control engagement of a torque transmitting mechanism of the transmission to enable the transmission to selectively attain a plurality of forward ranges and at least one reverse range, a plurality of trim valves, each trim valve being in direct fluid communication with at least one of the shift valves, and a normally-high actuator operably coupled to each of the trim valves, wherein the number of shift valves equals the number of trim valves and the number of normally-high actuators equals the number of trim valves.