Patent ID: 9341261
Filing Date: 2016-05-17
CPC Classification: F16H

Claim Text:
1. A torque converter clutch (TCC) control valve system for a motor vehicle transmission, the TCC control valve system comprising: a dual valve assembly with a first exhaust line that opens to air; a TCC control valve assembly with a second exhaust line that opens to air, the TCC control valve assembly communicating with the dual valve assembly through a fluid line, the TCC control valve assembly communicating with a torque converter having a lockup clutch, wherein when the lockup clutch is in a faulted open state, air is drawn into portions of the dual valve assembly through the first exhaust line, air flowing from the dual valve assembly through the fluid line to portions of the TCC control valve assembly, air flowing from the TCC control valve assembly to the torque converter, wherein air replaces hydraulic fluid in the torque converter, and wherein the displaced hydraulic fluid from the torque converter exits through the second exhaust line.