Patent ID: 9267582
Filing Date: 2016-02-23
CPC Classification: F16D,F16H,Y10T

Claim Text:
1. An apparatus for multiplexing gear engagement control in an automatic transmission operable in a plurality of operating modes, the apparatus comprising: a first and a second friction engagement device, each of the first and second friction engagement devices selectively engageable and disengageable to select a different gear ratio of the transmission, a trim system configured to selectively supply fluid at one of (i) an engagement pressure and (ii) a disengagement pressure to a first fluid passageway and a second fluid passageway in one of the plurality of operating modes, and a first control valve fluidly coupled directly to the first fluid passageway and the second fluid passageway and directly to the first friction engagement device and the second friction engagement device, wherein the first control valve is configured to contemporaneously route fluid at the engagement pressure to the first friction engagement device to engage the first friction engagement device and to the second friction engagement device to engage the second friction engagement device in a fault condition occurring during a transition between the plurality of operating modes of the transmission.