HYBRID POWERTRAIN WITH MECHATRONIC ACTUATOR ASSEMBLY AND METHOD OF CONTROLLING THE SAME

摘要

A powertrain includes an engine with a crankshaft rotating on a first axis, motor/generator unit (MGU), belted drive system, transmission, actuator assembly, and controller. An MGU rotor shaft rotates about a second axis. The belted drive assembly has a first pulley connected to the crankshaft, a second pulley selectively connected to the rotor shaft, and an endless rotatable drive element that connects the pulleys. The transmission is connected to the flywheel via an input clutch. The actuator assembly has a third axis parallel to the first and second axes, a linear actuator(s), pinion gears translatable along the third axis to selectively engage the first and second gear elements, and overrunning clutches to passively disengage the pinion gears from the first or second gear element. The controller transmits control signals to the MGU and linear actuators to command a control state via translation of the pinion gears.

主权项

1. A hybrid powertrain comprising:
an engine having a crankshaft, a flywheel connected to and rotatable via the crankshaft, and a first gear element that rotates in conjunction with the flywheel about a first axis; a motor-generator unit (MGU) having a rotor shaft that is rotatable about a second axis that is parallel to the first axis, and a second gear element connected to the rotor shaft; a selective coupling device disposed between the crankshaft and the MGU; a belted drive assembly having a first pulley connected to the crankshaft, a second pulley connected to the rotor shaft, and an endless rotatable drive element that connects the first and second pulleys, wherein an engagement of the selective coupling device delivers motor torque from the MGU to the crankshaft; a transmission operably connected to the engine via an input clutch; a mechatronic actuator assembly disposed between the first and second gear elements, and having a third axis that is parallel to the first and second axes, at least one linear actuator, a pair of pinion gears translatable along the third axis to selectively engage a respective one of the first and second gear elements, and a first overrunning clutch configured to passively disengage one of the pinion gears from the first gear element when a speed of the crankshaft exceeds a speed of the MGU; and a controller programmed to process a set of control inputs to thereby determine a required control state of the powertrain, and to transmit control signals to the MGU and the at least one linear actuator to thereby command execution of the required control state via translation of at least one of the pinion gears along the third axis.