Patent ID: 8403791
Filing Date: 2013-03-26
Classification: B60W,F16H,Y10T

Abstract:
1. An electro-hydraulic control for a vehicle transmission comprising: a plurality of electro-hydraulic trim valve systems configured to selectively communicate pressurized fluid to a plurality of transmission shift mechanisms, a shift valve in selective fluid communication with at least one of the trim valve systems and with at least one of the transmission shift mechanisms, a manual valve having a plurality of manually selectable positions, and a plurality of passages configured to selectively fluidly couple the trim valve systems, the shift valve, and the manual valve to the plurality of transmission shift mechanisms, so that one of the trim valve systems is in fluid communication with one of the transmission shift mechanisms to engage the transmission shift mechanism when the transmission is in a neutral, reverse, first, second, or third operating range and the same trim valve system is in fluid communication with a different transmission shift mechanism to engage the different transmission shift mechanism when the transmission is in a sixth, seventh, or eighth forward operating range.