A drive unit of a hybrid vehicle includes an engine; an electric motor; first and second differential mechanisms; a selectable one-way clutch; and a case accommodating the electric motor. Further, the first differential mechanism includes a first rotational element coupled to the electric motor, a second rotational element coupled to the engine, and a third rotational element that outputs power toward drive wheels, the second differential mechanism includes a sun gear coupled to the electric motor, a carrier coupled to the engine, a ring gear whose rotation is regulated by the selectable one-way clutch, and a ring gear flange that rotates integrally with the ring gear, and the selectable one-way clutch switches a state thereof between a locked state and an unlocked state, and the ring gear flange is supported by a rotor shaft of the electric motor via a radial bearing.

An electro-magnetically actuated pawl clutch is adapted to establish a fixed overdrive ratio in a powersplit type hybrid gearing arrangement. The electro-magnetically actuated clutch includes a first race splined to the transmission input shaft and a second race integrally formed into a first gear that is supported for rotation about the input shaft. Electrical current in a non-rotating coil establishes a magnetic field in the first race. The magnetic field causes a set of pawls to pivot with respect to the first race and to engage a cam surface in the second race. The pawls and cams are designed such that, when engaged, the second race can rotate faster than the inner race but cannot rotate slower. The first gear meshes with a second gear fixed to the transmission output shaft.

An installation structure of a one-way clutch in which torque transmission is limited to one direction includes a flywheel, first and second rotary structures, housing and stopper plates, and a rivet. The first rotary structure is arranged coaxially with the flywheel while connected to an engine block. The second rotary structure is arranged coaxially with the first rotary structure while connected to the flywheel. The housing plate is disposed between the flywheel and the first and second rotary structures and arranged coaxially while connected to the second rotary structure. The stopper plate is attached to the second rotary structure to hold first rotary structure with the housing plate. The rivet fastens the stopper plate, the second rotary structure, and the housing plate. A first clearance between one face of the flywheel and a top face of a head of the rivet is narrower than a thickness of the stopper plate.

A hybrid driveline assembly for a vehicle includes an engine, an electric motor, and a transmission having an input and an output. The transmission input is selectively coupled to the engine and electric motor. The transmission is shiftable between a plurality of drive modes. The driveline assembly further includes a final drive assembly operably coupled to the transmission output. The final drive assembly has a front final drive operably coupled to a rear final drive.

A low-voltage hybrid powertrain system for a vehicle includes an engine that is coupled via an engine disconnect clutch to an input member of the transmission, and a low-voltage electric machine is coupled to the transmission. The powertrain system operates in an electric vehicle (EV) mode with the engine in an OFF state and with the engine disconnect clutch in an open/deactivated state. When an output torque request indicates a command for vehicle acceleration, the electric machine is controlled to generate torque in response to the output torque request and the engine is simultaneously cranked and started. Upon starting, the engine operates in a speed control mode to activate the engine disconnect clutch. The engine and the low-voltage electric machine are controlled to generate torque in response to the output torque request when the engine disconnect clutch is activated.

A vehicle includes an engine, motor, transmission, and electronically controlled one-way clutch. The engine includes an output. The motor includes a rotor and a stator. The transmission includes an input that is rotatably coupled to the rotor. The transmission is configured to receive power from the engine and the motor. The electronically controlled one-way clutch has an inner race that is secured to the output of the engine and an outer race that is secured to the rotor. The electronically controlled one-way clutch is configured to rotatably couple the output to the rotor.

A hybrid vehicle includes an engine, a motor, and a belt stepless speed changer device having a driving rotary body, a driven rotary body, a first shaft member supporting the driving rotary body with allowing rotation thereof in unison, a second shaft member supporting the driven rotary body with allowing rotation thereof in unison, and an endless belt wound around the driving rotary body and the driven rotary body. The vehicle further includes a transmission case configured to receive the powers from the engine and the motor via the belt stepless speed changer device and a centrifugal clutch incorporated in a power transmission line extending form the engine to the first shaft member. The motor is disposed on the side opposite the engine across the driving rotary body, and the driving power of the motor is inputted to the first shaft member.

A vehicle transmission system having a combustion engine, an electric motor and a transmission includes a first clutch operatively connected between the engine and the motor and a one way clutch. The one way clutch is connected in parallel with the first clutch that permits the engine to increase speed with the clutch disengaged until the engine speed matches the motor speed. The engine provides positive torque through the one way clutch to the motor and transmission upon matching the motor speed. The first clutch and the one way clutch may be a hybrid rocker one way clutch.

A hybrid drive device includes: a first one-way clutch; a second one-way clutch; a first power transfer path through which power can be transferred from a rotor to wheels; and a second power transfer path which is composed of an engine rotation transfer member, the first one-way clutch, and a coupling member, through which power can be transferred from an internal combustion engine to an oil pump, and which intersects the first power transfer path at an intersection portion. An engagement element, the first one-way clutch, and the second one-way clutch are disposed on one side of the first power transfer path.

A vehicle drive system, that can improve drive efficiency while maintaining vehicle stability, includes a step (S3, S105) in which a switch is made from 2WD to AWD on the basis of a cumulative slip point; a step (S12, S303) in which a switch is made from 2WD to AWD on the basis of a calculated lateral G; a step (S13, S109, S111) in which a switch is made from AWD to 2WD after the step (S3 or S105) under a first switching condition; and a step (S13, S306, S308) in which a switch is made from AWD to 2WD after the step (S12 or S303) under a second switching condition. The first switching condition and the second switching condition differ from one another.