Retarder brake system of a vehicle combination

Patent metadata

Field	Value
Publication number	US-9616756-B2
Application number	US-201615134955-A
Country	US
Kind code	B2
Filing date	Apr 21, 2016
Priority date	Apr 30, 2015
Publication date	Apr 11, 2017
Grant date	Apr 11, 2017

Abstract

A retarder brake system of a vehicle combination including an agricultural tractor and an electrically driven trailer includes a drive train with a combustion engine, a vehicle transmission downstream from the combustion engine, a mechanical drive axle of the agricultural tractor connected to a first gear output of the transmission, a first electrical motor generator unit coupled to a second gear output, and an electrical drive axle of the trailer. The electrical drive axle is driven by means of a second electrical motor generator unit. The generator units are electrically connected with one another via a direct current link. In a retarder operation, the second electrical motor unit is operated with a generator and the first electrical generator unit is operated with a motor. At least part of the gross retarder output requested on the electrical drive axle is dissipatively destroyed as a power loss within the drive train.

First claim

The invention claimed is:

1. A retarder brake system of a vehicle combination including an agricultural tractor and an electrically driven trailer, comprising:
a drive train with a combustion engine;
a vehicle transmission coupled to the engine;
a mechanical drive axle of the agricultural tractor coupled to a first gear output of the transmission;
a first electrical motor generator unit coupled to a second gear output; and
an electrical drive axle of the trailer operably driven by a second electrical motor generator unit;
wherein, the two electrical motor generator units are electrically coupled to one another via a direct current link;
wherein, in a retarder operation, the second electrical motor generator unit is operated by a generator, and the first electrical motor generator unit is operated with a motor, where at least a portion of a gross retarder output requested on the electrical drive axle is dissipatively destroyed as a power loss within the drive train.

2. The retarder brake system of claim 1 , wherein the combustion engine is operated in a motor brake operation.

3. The retarder brake system of claim 2 , wherein the motor brake operation is triggered only if it is detected that the power loss of the drive train has been exhausted during execution of the retarder operation.

4. The retarder brake system of claim 1 , wherein additional units operated by means of the combustion engine exhaust at least a part of the gross retarder output.

5. The retarder brake system of claim 1 , wherein the second gear output is a front PTO shaft connection detachably coupled to the first electrical motor generator unit.

Assignees

• Deere & Co

Inventors

• Fritz Norbert
• Gugel Rainer

Classifications

• B60L7/10

  Dynamic electric regenerative braking (B60L7/22 takes precedence) · CPC title

• F02D13/04

  using engine as brake · CPC title

• B60L7/24 Primary

  with additional mechanical or electromagnetic braking · CPC title

• Y10S903/902

  Prime movers comprising electrical and internal combustion motors · CPC title

• B60T7/20 Primary

  specially for trailers, e.g. in case of uncoupling of {or overrunning by} trailer (inertia-actuated overrun brakes B60T13/08) · CPC title