HYDRAULICALLY-ACTUATED FUEL DELIVERY TIMING ADVANCE MECHANISM FOR DIESEL ENGINES WITH MECHANICAL FUEL INJECTION PUMPS
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United States of America Patent
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N/A
Issued Date -
Jul 17, 2014
app pub date -
Jan 16, 2014
filing date -
Jan 16, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A variable timing apparatus, for an internal combustion diesel engine equipped with a conventional mechanical fuel injection pump, includes a tubular extender having a front flange bolted to the normal injection pump mount and a rear mounting flange bolted to the injector pump. The tubular extender houses a timing drive shaft has a first end directly coupled to the engine's timing drive and a second free end equipped with a plurality of helical splines. The injection pump drive is equipped with straight splines. A spring-biased, slidable coupler, having a front end equipped with helical splines and a rear end equipped with straight splines, couples the timing drive shaft to the injection pump drive. After engine startup, oil pressure moves the sliding coupler axially rearward approximately 1.0 cm. As the slidable coupler travels axially rearward, it rotates and advances the injection timing by approximately 25 degrees.
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