Patent ID: 8936141
Filing Date: 2015-01-20
Classification: F16H,Y10T

Abstract:
1. A continuously variable transmission (CVT) for a vehicle, the transmission comprising: a hydraulically-controlled component; a pilot valve including a micro-electrical-mechanical-systems (MEMS) first valve portion and a second valve portion, wherein the first valve portion produces a pilot signal having sufficient pressure and flow to directly control the second valve portion, the second valve portion includes a mechanical non-MEMS spool valve that is at least 100 times larger than the MEMS first valve portion, the second valve portion amplifies the pilot signal to an amplified pilot signal, and the pilot valve is operably connected to and configured for actuating the hydraulically-controlled component; and a regulating valve operably connected to the pilot valve and the hydraulically-controlled component and configured to receive the amplified pilot signal and output a control signal to control the hydraulically-controlled component.