Gm Global Technolgoy Operations, Inc.

Bayerische Motoren Werke Aktiengesellschaft

Daimler Ag

Caterpillar Inc.

Chrysler Corporation

Visteon Global Technolgoies, Inc.

Chrysler Group LLC

Jian Wang

Eric M Rask

Monika A Minarcin

Jon K Logan

Bradley Bailey

Chihang Lin

Timothy Peter Raleigh

Joanne Borchert

A method of derating a retarding grid assembly of a machine is provided. The method may determine the temperatures of resistive elements and insulators associated with the retarding grid assembly, generate a trigger if any one of the temperatures of the resistive elements and insulators exceeds a respective temperature threshold, and determine a magnitude of deration to be applied to a drivetrain associated with the machine in response to the trigger. The magnitude of deration may be based at least partially on feedback and feedforward analyzes of the temperatures of the resistive elements and insulators. The magnitude of deration may correspond to a reduction in retarding capacity of the drivetrain.

Electrical retarding deration

A vehicle includes a friction braking system and a powertrain system including a torque machine operative to react tractive torque input from a wheel of the vehicle. A method for controlling braking in a vehicle includes monitoring operation of the powertrain system, determining a driver intended total brake torque, determining a regenerative braking capacity based upon the operation of the powertrain system, determining a regenerative braking request based upon a time-rate change in the regenerative braking capacity, and determining a motor torque command for the torque machine based upon the regenerative braking request.

Method for controlling regenerative braking in a vehicle

A vehicle includes a powertrain system and a friction braking system communicating tractive torque with a driveline, the powertrain system including a torque machine, and an energy storage device connected to the torque machine, said torque machine communicating tractive torque with the driveline. A method for controlling regenerative braking and friction braking includes monitoring a vehicle operating point, determining a braking torque request, determining a regenerative braking motor torque ratio based upon the vehicle operating point wherein the regenerative braking motor torque ratio is non-linearly dependent on the vehicle operating point, and actuating the friction brake based upon the regenerative braking motor torque ratio and the braking torque request.

Method for controlling regenerative braking and friction braking

A hybrid control system comprises a power loss (PL) determination module, a hysteresis estimation module, and a mode determination module. The PL determination module determines a power loss of a hybrid drivetrain based on an engine speed, a motor speed, and a vehicle speed. The hysteresis estimation module determines an average power loss of the hybrid drivetrain based on the power loss and determines a hysteresis power loss of the hybrid drivetrain based on the average power loss. The mode determination module selects an operation mode of the hybrid drivetrain based on the hysteresis power loss. The hybrid control system controls the hybrid drivetrain based on the operation mode.

Dynamic hysteresis evaluation method for hybrid vehicles based on optimal power loss control strategy

An independent rear suspension for a motor vehicle chassis includes a pair of independent rear corner modules. Each rear corner module includes a generally-longitudinally-extending leaf spring whose forward end is adapted to be pivotally mounted to the vehicle chassis at a first forward attachment point, and whose rearward end is nonrotationally-coupled to a knuckle, such that the leaf spring operates as a trailing arm to longitudinally position the knuckle relative to the chassis. A shackle adapted to be pivotally mounted on the chassis at a second forward attachment point includes an eye that encompasses a portion of the spring intermediate the first and second end of the spring. The shackle permits a predetermined, nonzero range of relative longitudinal, transverse, and torsional movement of the intermediate portion of the leaf spring while otherwise transferring vertical loads from the intermediate portion of the spring to the chassis.

Independently-suspended rear corner module for motor vehicle chassis featuring shackled leaf spring

Growing community of inventors

Ann Arbor, MI, United States of America

Jian Wang