Torque converter controller stuck-on test in a multiplex device

A system for fluid delivery in a continuously variable transmission comprising:

• a valve assembly having a first position and a second position, said valve assembly configured to distribute a fluid;
• one of a forward clutch and a reverse clutch connected to said valve assembly, wherein said valve assembly in said first position regulates one of said forward clutch and said reverse clutch and in said second position closes one of said forward clutch and said reverse clutch;
• a torque converter connected to said valve assembly, wherein said valve assembly in said first position opens the torque converter and in said second position regulates said torque converter;
• and
• a controller monitoring a transmission range, operating said valve assembly based on said transmission range, detecting said valve assembly stuck in said second position based on said transmission range, wherein said controller pulses said valve assembly in said second position to unstuck said valve assembly.

A method of controlling a multiplex device in a continuously variable transmission comprising:

• supplying fluid pressure to the multiplex device having a first position and a second position;
• regulating one of a forward clutch and a reverse clutch when the multiplex device is in said first position, wherein said one of said forward clutch and said reverse clutch is maintained at a constant fluid pressure when the multiplexing device is in said second position;
• regulating a torque converter clutch when the multiplex device is in said second position, wherein said torque converter is maintained at a constant fluid pressure when the multiplex device is in said first position;
• monitoring a transmission range;
• operating the multiplex device based on said transmission range;
• detecting the multiplex device stuck in said second position based on said transmission range;
• and
• pulsing the multiplex device when stuck in said second position.

A method of controlling a multiplex device in a continuously variable transmission comprising:

• supplying fluid pressure to the multiplex device having a first position and a second position;
• regulating one of a forward clutch and a reverse clutch when the multiplex device is in said first position, wherein said one of said forward clutch and said reverse clutch is maintained at a constant fluid pressure when the multiplexing device is in said second position;
• regulating a torque converter clutch when the multiplex device is in said second position, wherein said torque converter is maintained at a constant fluid pressure when the multiplex device is in said first position;
• monitoring a transmission range;
• operating the multiplex device based on said transmission range;
• detecting the multiplex device stuck in said second position based on said transmission range;
• and
• pulsing the multiplex device stuck in said second position to unstuck the multiplex device.

A method of controlling a valve assembly in a transmission comprising:

• supplying fluid pressure to a first valve assembly, wherein the first valve assembly has a first position and a second position;
• monitoring a transmission range;
• operating the first valve assembly to said first position based on said transmission range;
• commanding a maximum pressure to a second valve assembly;
• detecting the first valve assembly stuck in said second position based on a torque converter slip.