Method and apparatus for retarding an engine

Details Method and apparatus for retarding an engine Method and apparatus for retarding an engine

2007-12-20

2010-12-14

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Having distinct cooling or lubricating structure

C060S468000

Reexamination Certificate

active

07849688

ABSTRACT:
A method and system for retarding an engine of a machine is provided. The machine has a hydraulic pump driven by the engine, a motor driven by the hydraulic pump, and a fan driven by the motor. The method includes sensing the operating speed of the engine with an engine speed sensor. The method also includes operating the motor at a first pressure. The method also includes comparing the operating speed to a trigger speed. The method also includes operating the motor at a second pressure greater than the first pressure if the operating speed of engine exceeds the trigger speed by a predetermined value.

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patent: 2007/0099757 (2007-05-01), Landes
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