US 11,299,141 B1 · System for multi-layer braking and retardation in a work vehicle

Abstract

A control system is provided for implementing multi-layer braking and retardation in a work vehicle that includes a hybrid electric drive system having an engine and one or more electric machines. The control system includes a braking and retardation system that dissipates energy generated by motion of the work vehicle, with the braking and retardation system including a brake resistor, an engine brake, and a transmission operable to provide transmission braking. A controller receives inputs on a braking torque demand and operational parameters of the hybrid electric drive system and the braking and retardation system, determines an amount of energy absorption necessary to meet the braking torque demand, and allocates the energy to be absorbed within the braking and retardation system according to a hierarchal energy allocation scheme based on the energy to be absorbed and the operational parameters of the hybrid electric drive system and braking and retardation system.

Claims20

Dependent claims

A control system for providing multi-layer braking and retardation in a work vehicle that includes a hybrid electric drive system having an engine and one or more electric machines, the control system comprising:

a braking and retardation system configured to dissipate energy generated by motion of the work vehicle, the braking and retardation system comprising a brake resistor, an engine brake, and a transmission operable to provide transmission braking;
and
a controller, including a processor and memory architecture, operably connected to the hybrid electric drive system and the braking and retardation system, the controller configured to:
receive a plurality of inputs comprising a braking torque demand from an operator and operational parameters of the hybrid electric drive system and the braking and retardation system;
determine an amount of energy absorption necessary in the work vehicle to meet the braking torque demand;
and
allocate the energy to be absorbed within the braking and retardation system according to a hierarchal energy allocation scheme, with the energy allocated based on the determined amount of energy absorption and the operational parameters of the hybrid electric drive system and the braking and retardation system.

4 more elements

A work vehicle comprising:

a drive train including an engine, one or more electric machines, and a transmission to selectively transfer power from at least one of the engine and the one or more electric machines to an output shaft;
and
a braking and retardation system configured to dissipate energy generated by motion of the work vehicle, the braking and retardation system comprising a brake resistor, an engine brake, and transmission braking provided by the transmission;
and
a controller, including a processor and memory architecture, in communication with the drive train and the braking and retardation system, the controller configured to:
receive a plurality of inputs comprising a braking torque demand and operational parameters of the drive train and the braking and retardation system;
determine an amount of energy absorption necessary in the work vehicle to meet the braking torque demand;
and
allocate the energy to be absorbed within the braking and retardation system according to a hierarchal energy allocation scheme, with the energy allocated based on the determined amount of energy absorption and the operational parameters of the drive train and the braking and retardation system.

6 more elements

Dependencies are inferred from the claim text.

System for multi-layer braking and retardation in a work vehicle

Life of this patent

System for multi-layer braking and retardation in a work vehicle

Life of this patent

Abstract

Claims20