Gm Global Technolgoy Operations, Inc.

Joseph Young-Long Chen

Arvo J Siismets

James M Hart

Clinton E Carey

Edward W Mellet

Daryl A Wilton

Leonid Basin

Jack M Gayney

Michael S Powell

Hun J Kim

Angela P Willis

Scott R Zechiel

An engine gear drive assembly may include first and second taper gears and a biasing member. The first taper gear may be rotationally and axially fixed to the first rotary engine component. The second taper gear may be rotationally fixed to the second rotary engine component and axially displaceable relative to the second rotary engine component. The biasing member may bias the second taper gear in a first axial direction into engagement with the first taper gear.

Engine tapered gear assembly

A scissor gear assembly may include first and second gears, a friction plate, and a biasing member. The first gear may have a first number (n) of gear teeth extending from a perimeter thereof. The second gear may have a second number (m) of gear teeth extending from a perimeter thereof and may be concentrically mounted relative to the first gear and rotatable relative to the first gear. The second number (m) of gear teeth may be greater than the first number (n) of gear teeth. The friction plate may be rotationally fixed relative to the first gear. The biasing member may have a first end axially fixed relative to the first gear and a second end axially biasing the second gear and the friction plate into engagement with one another.

Engine scissor gear assembly

An outer needle bearing race and thrust washer assembly provides improved lubrication for a pinion gear of a planetary gear assembly. The bearing race and thrust washer assembly are used in pairs with the bearing races disposed within the planet or pinion gear and the thrust washers disposed adjacent the end faces of the planet or pinion gear. Each assembly includes a cylindrical bearing portion having a crowned, i.e., convex, inner surface which is secured at one end to a thrust washer. The outside face of the washer includes a plurality of shallow radial channels or grooves. A plurality of oil passageways extend from the grooved surface of the washer to its opposite surface inside the cylindrical bearing portion.

Bearing assembly for planetary gear pinion

An electronic drive unit includes a case housing that extends along a primary axis. A sleeve shaft and an electric motor are disposed in the hollow interior of the case housing. The electric motor is operatively connected to the sleeve shaft to rotate the sleeve shaft about the primary axis. At least one gear set is disposed in operative engagement with the sleeve shaft and is configured for rotation about the primary axis. A pair of output shafts each extends along the primary axis within the case housing. The output shafts are rotatably connected to the gear set and are configured for rotation about the primary axis. The gear set is configured to translate rotation of the sleeve shaft into rotation of the output shafts about the primary axis at a rotational velocity that is less than the rotational velocity of the sleeve shaft.

Electronic drive unit

A retaining device or snap-ring for retaining a mating hub and drum within a transmission is provided. The device is insertable into a groove along the inner circumference of a circular flange and includes a main outer loop, an opening for dividing the snap-ring into two deflectable curvilinear portions and at least partially defined by a tabular extension projecting from each curvilinear member. The tabular extensions provide sufficient surface area for applying deflective or compressive force to the snap-ring and are contoured to facilitate use of a deflection tool. The snap-ring further comprises an externally-projecting secondary loop for reducing deflection force, or an internally-projecting secondary loop for increasing deflection force. The snap-ring may be used within a double-flange hub having a plurality of slots for facilitating insertion of the secondary loop and the tabular extensions within the flange groove.

Snap-ring with additional loop

A multi-speed transmission includes first and second output gear sets having co-planar intermeshing gears axially-spaced from one another. Each has a first gear intermeshing with a second gear, one of which is connected for common rotation with an output shaft or a first countershaft and the other of which is connected for rotation about and selectively engagable with the other of the output shaft and first countershaft by a respective output torque-transmitting mechanism. A direct drive torque-transmitting mechanism is selectively engageable for transferring torque from the input shaft to the output shaft when neither of the output torque-transmitting mechanisms is engaged. The first output torque-transmitting mechanism is engaged during underdrive gear ratios and the second output torque-transmitting mechanism is engaged during overdrive gear ratios. The order of engagement of torque-transmitting mechanisms during the underdrive gear ratios may be repeated during the overdrive gear ratios.

Growing community of inventors

Ann Arbor, MI, United States of America

Joseph Young-Long Chen