Patent ID: 8690732
Filing Date: 2014-04-08
Classification: F16H,Y10S,Y10T

Abstract:
1. An electro-hydraulic control system for a transmission, the electro-hydraulic control system comprising: a pressure switch to receive fluid, to open in response to a pressure level of the fluid being greater than a threshold pressure level, to close in response to the pressure of the fluid being less than the threshold pressure level, and to generate a status signal that indicates status of the pressure switch, a plurality of valves to develop a main line pressure based upon regulator control signals, to develop a control main pressure based upon the main line pressure, and to develop a clutch feed pressure based upon clutch control signals, the main line pressure, and the control main pressure and to selectively deliver fluid at the control main pressure to the pressure switch based upon a pressure level of the main line pressure, and an electronic control module to generate regulator control signals to increase the main line pressure from a nominal pressure level to a first pressure level and to detect faults based upon status signals of the pressure switch at the first pressure level.