Eaton Corporation

Scott M Besemer

Andrew Nathan Edler

Matthew George Fox

Daniel Philip Fisher

Christian Thomas Chimner

Jeffrey A Oesch

Gregory L Heatwole

John Allen Grogg

A hydraulic control unit that delivers hydraulic fluid to a limited slip differential includes a hydraulic control unit housing, a sump and a motor. The hydraulic control unit housing has an accumulator housing portion that houses a biasing assembly and a piston. The sump is defined in the hydraulic control unit housing and at least partially occupies a common space with the accumulator housing portion. The motor is configured to pump fluid into an accumulator chamber of the accumulator housing portion. The fluid pumped into the accumulator housing portion at least partially collapses the biasing assembly and introduces a pre-charge into the hydraulic control unit. The biasing assembly is configured to expand and urge the piston in a first direction resulting in fluid being communicated from the hydraulic control unit and into the limited slip differential.

Hydraulic control unit for a limited slip differential

Hydraulic power unit

A piston system comprises a housing () comprising a first recess () and a second recess (). A first piston () comprises a first portion embedded in the first recess (). A second piston () comprises a second portion embedded in the second recess (). An actuator () has a first side () and a second side (). The first piston () selectively presses against the first side () of the actuator, and the second piston () selectively presses against the second side () of the actuator. The actuator may be a synchronizer of a clutch assembly.

Dual piston disconnect actuator for power transfer unit

Limited slip differential

The present disclosure provides an improved, integrated electronically controlled hydraulic-based torque distribution system and related method. The torque distribution system of the present disclosure includes an electric motor that drives a pump that generates hydraulic pressure used to selectively activate a clutch pack to transfer torque to the wheels of a motor vehicle.

Torque management unit with integrated hydraulic actuator

Hydraulic power unit having fill port

Axle mounted hydraulic power unit

A hydraulic actuation system includes a differential unit having a hydraulically-actuated differential, a power steering unit, a hydraulic pump, a reservoir, a controller, an electronically-controlled flow control manifold, and a proportional pressure control solenoid valve. A flow control manifold may control fluid flow to the power steering unit and the differential. The manifold may include a manifold inlet connected to a pump; first manifold outlet connected to a differential; second manifold outlet connected to a reservoir; third manifold outlet connected to a power steering unit; two-way solenoid valve connected to a manifold inlet and controlled by a controller; flow control valve connected to a two-way solenoid valve and a first manifold outlet; and a pressure differential sensing valve connected to a two-way solenoid valve, the manifold inlet, and the third manifold outlet. A proportional pressure control solenoid valve may connect the first manifold outlet and the differential.

Hydraulic power system

Integrated electronic limited slip rear wheel drive axle cover

A limited slip differential assembly includes a planetary gear assembly, a differential case, a differential gear assembly and a hydraulic clutch assembly. The differential case is coupled for rotation with a portion of the planetary gear assembly. The differential gear assembly is arranged within the differential case and includes a first side gear and a second side gear for coupling with first and second drive wheels of a vehicle, respectively. The hydraulic clutch assembly includes a clutch pack and a clutch actuator. Pressurized hydraulic fluid from a transmission pump is selectively provided to the clutch pack to actuate the clutch pack between an open configuration, in which the side gears rotate independently, and a fully closed configuration, in which the side gears rotate together such that the first and second drive wheels rotate at a same speed.

Growing community of inventors

Battle Creek, MI, United States of America

Scott M Besemer