System and method for supplying auxiliary power to a large diesel engine
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United States of America Patent
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Jan 27, 2009
Grant Date -
Sep 15, 2005
app pub date -
May 5, 2005
filing date -
Jan 31, 2001
priority date (Note) -
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Abstract
A system and method for starting a large diesel engine using at least one hydraulic motor includes an auxiliary power unit having a hydraulic pump for driving a hydraulic motor coupled to the diesel engine. The hydraulic pump may automatically pump oil from the diesel engine into a pressure reservoir until a pressure set point is exceeded. When the pressure set point is exceeded, a relief/check valve positioned between the pressure reservoir and the hydraulic pump may open to divert some lubrication oil through a heater and back into the diesel engine. To start the diesel engine, a solenoid-controlled valve, positioned between the pressure reservoir and a hydraulic motor coupled with the diesel engine, may be opened to release pressurized oil to the hydraulic motor. After energizing the hydraulic motor, the oil may be diverted back to a sump of the diesel engine.
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