Patent ID: 8844694
Filing Date: 2014-09-30
Classification: F16D,F16H,F16K,Y10T

Abstract:
1. A dry dual clutch transmission for a vehicle, the dry dual clutch transmission comprising: a hydraulic component; a pilot valve assembly including a first valve portion and a second valve portion, wherein the first valve portion includes a micro-electro-mechanical systems (MEMS) pilot microvalve, and wherein the second valve portion includes a small mechanical spool valve that is larger than a MEMS based spool valve; and a regulating valve operably connected to the pilot valve assembly and the hydraulic component and operable to direct fluid to the hydraulic component when actuated by the pilot valve assembly; wherein the first valve portion of the pilot valve assembly outputs an unamplified pilot signal, which is amplified by the second valve portion of the pilot valve assembly to define an amplified pilot signal, with the regulating valve receiving the amplified pilot signal and outputting a control signal to control the hydraulic component.