Patent ID: 8801567

Claim:
Method for operating a hybrid transmission including first and second electric machines in response to a command to execute a shift from an initial continuously variable mode to a target continuously variable mode, comprising: increasing torque of an oncoming clutch associated with operating in the target continuously variable mode and correspondingly decreasing a torque of an off-going clutch associated with operating in the initial continuously variable mode; upon deactivation of the off-going clutch, controlling torque outputs of the first and second electric machines and the torque of the oncoming clutch to synchronize the oncoming clutch; and upon synchronization of the oncoming clutch, increasing the torque of the oncoming clutch and operating the transmission in the target continuously variable mode, wherein increasing the torque of the oncoming clutch occurs at a rate and a magnitude equivalent to the rate and magnitude of decreasing the torque of the off-going clutch.