Gm Global Technology Operations LLC

James M Hart

Scott H Wittkopp

Andrew W Phillips

Clinton E Carey

Edward W Mellet

Madhusudan Raghavan

Daryl A Wilton

James B Borgerson

Edwin T Grochowski

Elizabeth I Wooden

Gregory Hukill

Donald L Dusenberry

Craig S Ross

Douglas John Dwenger

Joel M Maguire

John A Diemer

Tejinder Singh

Boris Iosifovich Burgman

Patrick S Portell

Chi Teck Lee

Farzad Samie

Shawn Harold Swales

Steven Patrick Moorman

Bret M Olson

Vijay A Neelakantan

Anthony L Smith

Hamid Vahabzadeh

Leonid Basin

Darrell Lee Robinette

Christopher M Kaminski

Jeffrey Kenneth Baran

Matthew James Laskaska

Chunhao J Lee

Alan G Holmes

Dongxu Li

Kumaraswamy V Hebbale

Shushan Bai

Dumitru Puiu

John C Schultz

David R Staley

Norman Schoenek

Pete R Garcia

Robert L Moses

Scott Heitzenrater

Hong Yang

Alexander Millerman

Zhe Xie

Robert Benson Parrish

Gary H Paelicke

Randal William Arndt

Joseph Young-Long Chen

Eric Christopher Sandstrom

Kenneth C Hauser

Mark David Kieliszewski

Ted R Skrzycke

William Marc Modisett

Favian Zavala

Brenten Paul Corliss

Keith W Noser

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

A transmission system has a housing including a wall and a gear support extending from the wall. The gear support has an outer surface and an inner surface defining a passage. The outer surface includes a seal receiving portion and a seal support axially spaced from the seal receiving portion. A seal is positioned about the gear support at the seal receiving portion. A sleeve is arranged on the outer surface of the gear support between the wall and the seal and a pump drive gear is mounted on the gear support and is supported by the sleeve. The pump drive gear includes an outer toothed surface, an inner surface, and a bushing arranged on the inner surface, the bushing extending about the sleeve.

Pump drive architecture for an automatic transmission

A transfer case pump includes an oil pump, a cover assembly, and a torque transfer mechanism. The oil pump has a pump shaft, and is configured to pressurize a lubricant in response to a rotation of the pump shaft. The pump shaft rotates around a pump axis. The pump axis is parallel to a rear axis of a rear shaft. The pump axis is offset from the rear axis. The cover assembly has a channel configured to transfer the lubricant from the oil pump to the rear shaft. The cover assembly extends around the rear shaft and around the pump shaft. The torque transfer mechanism is configured to transfer a torque from the rear shaft to the pump shaft.

Transfer case off-axis pump

A drive torque transfer case is provided. The transfer case includes an input shaft, an output shaft, a gear assembly coupled to the input shaft, and a range clutch assembly coupled to the output shaft. The range clutch assembly includes a clutch member and a multi-piston actuator configured to receive a pressurized transmission fluid for selectively axially translating the clutch member to engage a component of the gear assembly for transmitting a drive torque from the input shaft to the output shaft. The multi-piston actuator includes an internal piston having a first annular surface area Aand a third annular surface area A, and an external piston having a second annular surface area Aand a fourth annular surface area A. The Aand Aare in hydraulic communication with a first hydraulic chamber, and Aand Aare in hydraulic communication with a second hydraulic chamber.

Hydraulically actuated transfer case

A P2 transmission and engine assembly includes a transverse mounted transmission having: a transmission first end and a transmission second end oppositely positioned with respect to the transmission first end; and a transmission gearbox portion having a first cavity positioned at the second end. A torque converter is positioned at the transmission first end. An electric motor is positioned within the first cavity and is rotatably connected to the torque converter using a turbine shaft. A one-way clutch is connected to the turbine shaft and releasably connects the turbine shaft to the torque converter. The one-way clutch when disengaged disconnects the torque converter from the turbine shaft.

Turbine mounted P2 front wheel drive transmission arrangement

A friction clutch assembly for an automatic transmission is provided. The friction clutch assembly is configured to move between an applied position and a released or disengaged position. A plurality of clutch plates may include friction plates and interleaved reaction plates, plus an apply plate and a backing plate. A separator feature is disposed adjacent to at least one of the reaction plates, the friction plates, the apply plate, and the backing plate. At least one of the reaction plates, the friction plates, the apply plate, and the backing plate defines a passage configured to allow fluid to flow through the friction clutch assembly and around the separator feature.

Fluid draining through clutch plates having separator features

A transmission sealed low leak controls system includes a controls system having a first fluid for operation of the controls system provided by a first pump at a first pressure. A transmission input shaft is provided. A planetary gear set is connected to the transmission input shaft by a clutch assembly. A second pump provides a second fluid different from the first fluid for cooling and lubrication of the at least one clutch assembly at a second pressure lower than the first pressure. A torque converter is connected to the transmission input shaft. The second pump further provides the second fluid to the torque converter.

Sealed low leak controls system in an automatic transmission

A transmission is provided having an input member, an output member, at least three planetary gear sets, a plurality of interconnecting members and six torque transmitting mechanisms. The torque transmitting mechanisms include clutches and brakes that are actuatable in combinations of three to establish at least ten forward gear ratios and at least one reverse gear ratio.

Multi-speed transmission

Multi-Speed Transmission

A torque transferring transmission-drive system includes a first friction surface. A second friction surface is directed toward the first friction surface. A reaction plate is positioned between the first friction surface and the second friction surface. A piston is actuated by a fluid pressure to displace the first friction surface toward the second friction surface, frictionally engaging the reaction plate between the first friction surface and the second friction surface. At least one strap spring in a clutch engaged condition elastically compresses to allow the reaction plate to be frictionally engaged between the first friction surface and the second friction surface, and in a clutch disengaged condition the at least one strap spring elastically expands to create a clearance between the reaction plate and each of the first friction surface and the second friction surface.

Torque transferring clutch separation

A passive opening transmission clutch system includes a backing plate having multiple tab slots, each of the tab slots having a tapered wall. A first reaction plate has multiple first tapered spline teeth oriented transverse to a plane of the first reaction plate. The first tapered spline teeth are positioned at least partially in individual ones of the tab slots in a clutch disengaged condition. The first tapered spline teeth when displaced further into the tab slots and toward the backing plate define a clutch engaged condition. A first friction plate is in frictional contact with the first reaction plate in the clutch engaged condition, the first friction plate when rotated generating a rotational force on the first reaction plate. The rotational force acts against the first tapered spline teeth to induce the first reaction plate to slidably move away from the backing plate.

Passive opening low loss clutch pack

A motor vehicle planetary axis transfer gearbox system includes a connective housing connecting an engine to a transmission of a motor vehicle with the transmission being positioned forward of the engine. An axis of an engine output shaft is oriented substantially parallel to an axis of a transmission input shaft. Both the axis of the engine output shaft and the axis of the transmission input shaft are oriented substantially perpendicular to a central axis of the motor vehicle. A planetary gear set is connected to one of the engine output shaft or the transmission input shaft acting to reverse a direction of rotation of either the engine output shaft or the transmission input shaft to match a direction of rotation of both the engine output shaft and the transmission input shaft. A drive chain connects the engine output shaft to the transmission input shaft.

Planetary axis transfer gearbox

A vehicle powertrain includes a manual transmission with an input shaft including a plurality of input gears and at least one main shaft including a plurality of driven gears engaged with the input gears. An engine includes a drive shaft drivingly connected to the input shaft via an engine disconnect clutch and a launch clutch. An electric motor is non-concentric with the input shaft and is drivingly connected to the input shaft via the launch clutch.

Hybrid manual transmission

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Belleville, MI, United States of America

James M Hart