The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

F02M 59/20 (2006.01); F04B 7/00 (2006.01); F02M 59/02 (2006.01); F02M 59/22 (2006.01); F02M 59/46 (2006.01); F04B 49/12 (2006.01);

U.S. Cl.

CPC ...

F04B 7/00 (2013.01); F02M 59/022 (2013.01); F02M 59/20 (2013.01); F02M 59/205 (2013.01); F02M 59/22 (2013.01); F02M 59/462 (2013.01); F04B 49/12 (2013.01);

Abstract

A fuel injection pump having a variable pressure chamber which can adjust a fuel injection timing according to each engine load with a simple structure and a lower manufacture cost compared to the conventional injection pump without a separate apparatus for moving a barrel as well as not modifying a shape of a plunger. The fuel injection pump having the variable pressure chamber further includes a pressure adjustment mechanism including a contact plug of which lower portion is inserted and installed in the upper cover; a cylinder of which lower portion is inserted and installed in the contact plug and having the variable pressure chamber formed inside thereof; a main fuel pressing hole formed in the upper cover and the barrel to connect the variable pressure chamber of the cylinder and a plunger insertion hole of the barrel; a piston installed in the variable pressure chamber of the cylinder to enable an upward and downward sliding motion thereof; and a manual pressure adjustment unit installed on an upper portion of the cylinder to enable a vertical height adjustment to elastically support the upper portion of the piston.

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