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:
May. 03, 1988
Filed:
Nov. 28, 1986
Richard F Teerman, Wyoming, MI (US);
Richard S Knape, Grand Rapids, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A diesel unit fuel injector includes a pump assembly having an externally actuated plunger reciprocable in a bushing which with the plunger defines a pump chamber, with flow therefrom during an injection cycle portion of the pump stroke being directed to a fuel injection nozzle of the assembly. The injection nozzle includes a needle type differential area injection valve that is normally biased to a valve closed position by a valve return spring which is positioned in a spring chamber and which is operatively connected to the opposite end of the injection valve. Passage means, including orifice passage are used to direct spill flow from the pump chamber at the end of an injection cycle to the spring chamber to effect closure of the injection valve at a valve closing pressure which is greater than the valve opening pressure so that the pressure of the discharge of fuel at the end of an injection cycle is relatively great whereby to effect increased penetration of the discharged fuel into the associate combustion chamber of a diesel engine.