Gm Global Technolgoy Operations, Inc.

Chi Teck Lee

Christopher M Kaminski

James M Hart

Gregory W Kempf

Favian Zavala

Matthew James Laskaska

Dumitru Puiu

Arthur L McGrew, Jr

Timothy J Reinhart

Dan Coffey

Addison T Solak

Randal William Arndt

Peter Tomsa

Brenten Paul Corliss

Greg B Witczak

Trevor Murray

Kirk L Wirth

Compact electric drive units and vehicles with such drive units are provided. An exemplary electric drive unit includes an electric motor configured to provide an electric motor torque; an input differential configured to split the electric motor torque into a first path and a second path; a final drive gear on each path; a pinion gear on each path; and a rear transfer shaft assembly and a front transfer shaft assembly on each path. Further, each pinion gear is configured to transfer torque to a respective rear transfer shaft assembly and a respective front transfer shaft assembly, and the respective rear transfer and front transfer shaft assemblies are configured to transfer torque to the respective final drive gear.

Compact electric drive units and vehicles

A product including a carrier having piloting features for assembling multiple gear drives for use in an electric drive unit of a vehicle. A method of assembling a portion of an electric drive unit utilizing a gear piloting carrier having piloting features for assembling multiple gear drives.

Multi-axis gear piloting carrier for electric drive unit

Locking differential systems, vehicles and methods are provided. An electric vehicle includes an electric motor including a stator and a rotor, wherein the rotor is configured to rotate about a rotor axis; a rotor shaft connected to the rotor for rotation about the rotor axis; a differential located within the rotor shaft; a first input shaft connected to first side of the differential; a second input shaft connected to second side of the differential; a locking system configured to selectively lock rotation of the first input shaft to rotation of the rotor shaft; a control system configured to determine when to lock rotation of the first input shaft to rotation of the rotor shaft; and an actuation system configured to operate the locking system to lock rotation of the first input shaft to rotation of the rotor shaft.

Locking differentials in rotor shafts

An electric vehicle drive unit includes an electric motor generating a torque. An input differential splits the torque into a first torque created by a first side gear and a second torque created by a second side gear. A first pinion gear shaft assembly receives the first torque and has a first pinion gear. A second pinion gear shaft assembly receives the second torque and has a second pinion gear. A first stage transfer gear assembly has a first, a second, a third, and a fourth transfer gear. A first stage speed reduction meshes the first pinion gear with the first transfer gear and the third transfer gear, and meshes the second pinion gear, the second transfer gear and the fourth transfer gear. A second stage gear assembly engages the first stage transfer gear assembly and includes a first final drive gear and a second final drive gear.

Gear load canceling electric drive unit architecture

An automobile vehicle split torque transmission includes an electrical motor having a rotor drive shaft with a drive pinion attached to the rotor drive shaft, the rotor drive shaft defining a first axis. A first transfer gear is mounted on a first transfer gear shaft defining a second axis, the first transfer gear meshed with the drive pinion. A second transfer gear is mounted on a second transfer gear shaft defining a third axis, the second transfer gear meshed with the drive pinion. A differential ring gear is supported on a differential shaft and rotates a differential assembly, the differential shaft defining a fourth axis.

Compact split torque transmission for wide overall ratio coverage

A transmission with a common carrier planetary gear set is provided for a vehicle that has drive axle half shafts defining an axis of rotation, an electric motor/generator with a motor shaft parallel with the axis of rotation, either concentric with the axis of rotation or spaced therefrom, and a differential with a differential carrier connected with the drive axle half shafts. The planetary gear set has a first sun gear member continuously or selectively connectable with the motor shaft, first and second pinion gears, a carrier member rotatably supporting the first and the second pinion gears so that the first pinion gear meshes with the first sun gear member, and a ring gear member meshing with one of the pinion gears. The ring gear is connectable to a non-rotating housing. The carrier member is operatively connected with the differential carrier.

Vehicle transmission with common carrier planetary gear set

A power take-off (PTO) system for a motor vehicle includes a PTO housing. The PTO housing is mounted to a transmission case. A disconnect clutch assembly is positioned within the PTO housing acting when supplied with a first volume of a pressurized oil from the transmission case to engage an output shaft member. A controlled lube oil circuit is isolated from the first volume of the pressurized oil. The controlled lube oil circuit supplies a second volume of the pressurized oil directly to the disconnect clutch assembly to lubricate the disconnect clutch assembly. A lube oil drain return is connected to the PTO housing. The lube oil drain return receives oil that collects inside the PTO housing to be returned to the transmission case.

Power take-off oil system providing sump drain and pressurized oil to disconnect clutch

A transmission includes a housing, an input shaft, a transfer shaft, a first and second transfer members, a continuous transfer member, a drive shaft, and a torque transmitting mechanism. The input shaft and transfer shaft are each rotatably supported by the housing and are parallel to each other. The first transfer member is connected for common rotation with the input shaft. The second transfer member is connected for common rotation with the transfer shaft. The continuous transfer member is engaged with each of the first and second transfer members. The drive shaft is disposed coaxially and partially covered by the transfer shaft. The torque transmitting mechanism selectively connects the transfer shaft with the drive shaft.

Transmission with integrated power take-off

A chain drive power take off assembly drives a hydraulic fluid pump from a torque converter input of a motor vehicle. The assembly includes a first, chain drive sprocket which is coupled to and driven by a engine output/torque converter input member such as an engine crankshaft or transmission input member, a chain and a second, driven chain sprocket which is coupled to a stub shaft and which, in turn, is coupled to an input shaft of the hydraulic pump. The driven sprocket resides in a housing secured to the side of the transmission and the pump is secured to the housing with its input shaft and axis of rotation disposed offset from and parallel to the axis of rotation of the transmission and torque converter input member.

Chain drive power take off for hydraulic pump

A transmission is provided having an input member, an output member, at least four planetary gear sets, a plurality of coupling members and a plurality of torque transmitting devices. Each of the planetary gear sets includes first, second and third members. The torque transmitting devices include clutches and brakes actuatable in combinations of three to establish a plurality of forward gear ratios and at least one reverse gear ratio.

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Novi, MI, United States of America

Chi Teck Lee