The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 1983
Filed:
Sep. 13, 1982
Martin M Hoch, Rochester, NY (US);
Donald Stoltman, Henrietta, NY (US);
General Motors Corporation, Detroit, MI (US);
Abstract
The reciprocating plunger reciprocable in the pump cylinder of a distributor type diesel fuel injection pump is helically splined to an index ratchet gear that is also operatively associated with a pawl detent whereby the index ratchet gear is rotatable in only one direction. The plunger has a discharge slot on its outer peripheral surface which registers with one of the plural discharge ports opening from the pump cylinder and the plunger controls the covering and uncovering of a fuel inlet port to the pump cylinder. Upon a pump stroke of the plunger, the index ratchet gear is rotated so that the next adjacent tooth is brought into alignment with the pawl detent to then prevent its rotation in the opposite direction during the suction stroke of the plunger. With the index ratchet gear thus fixed, the plunger is thus rotated on the suction stroke so as to align the discharge slot with the next adjacent discharge port. A normally open solenoid valve controls spill flow from the pump cylinder during a pump stroke of the plunger so as to control the start and end of fuel injection.