Patent ID: 8649947

Claim:
A powertrain for a vehicle, the powertrain comprising: an engine having a throttle valve and an output member; a transmission having an input member and at least a first set of gears corresponding to a first gear ratio; a torque transfer mechanism including a hydraulic fluid pump, an input member, and an output member, wherein the hydraulic fluid pump includes a first fluid port and a second fluid port, the input member of the torque transfer mechanism is drivingly connected to the output member of the engine, and the output member of the torque transfer mechanism is drivingly connected to the input member of the transmission; a hydraulic fluid circuit filled with hydraulic fluid, the hydraulic fluid circuit having a hydraulic valve in communication with the first fluid port of the hydraulic fluid pump; and a transmission control module in electrical communication with each of the throttle valve of the engine, the hydraulic valve, and a one-way clutch, the transmission control module including a control logic, the control logic including: a first control logic for determining the rotational speed of the input member of the transmission, the rotational speed of the output member of the engine, which gear ratio the transmission is engaged, and the position of the throttle valve; a second control logic for opening the hydraulic valve when the rotational speed of the input member of the transmission is zero, the rotational speed of the output member of the engine is at an idle speed, the transmission is engaged in first gear, and the throttle valve is in an open position; a third control logic for receiving a signal from the throttle valve indicating the opening of the throttle valve; a fourth control logic for sending a signal to the hydraulic valve to start closing; a fifth control logic for sending a signal to the hydraulic valve to follow a profile for closing the hydraulic valve; and a sixth control logic for sending a signal to the hydraulic valve to close completely to a closed position.