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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Issued Date -
Oct 1, 2020
app pub date -
Mar 26, 2019
filing date -
Mar 26, 2019
priority date (Note) -
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Abstract
A variable timing apparatus, for an internal combustion engine equipped with a 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 timing drive shaft is equipped with a male right-hand helically-splined drive. The injection pump drive is equipped with a left-hand helically-splined drive. A spring-biased, slidable coupler has a front end right-hand helically-splined socket that engages the male right-hand drive, and a rear end left-hand helically-splined socket that engages the male left-hand drive on the injector pump. After engine startup, oil pressure moves the sliding coupler axially rearward and rotates clockwise with respect to and as seen from the timing drive shaft. The injection pump drive also rotates clockwise, with respect to the coupler, thereby advancing injection timing.
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