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:
Jun. 20, 1995
Filed:
Jul. 15, 1994
Michael C Connolly, Royal Oak, MI (US);
David A Richeson, Livonia, MI (US);
Nshan Hamparian, Troy, MI (US);
General Motors Corporation, Detroit, MI (US);
Abstract
A fuel distributing pump for a multi-cylinders, internal combustion engine having a sinuously profiled cam member providing a plurality of discrete compound cam pumping stations, each comprising primary and auxiliary cams serially arranged and interconnected by an intermediate cam segment which cooperate with pumping plungers of a pump rotor to shape and vary the pulse waves of fuel delivered to the combustion chambers for varying engine operations. For low horsepower requirements, such as idle and light loads, only the primary cam with fast initial pumping rate and following low rate camming ramps or surfaces are utilized to shape the pulse wave with a fast beginning and a graduated end of injection for even and progressive fuel burn for reducing smoke and engine noise. For higher engine loads, the primary cam, the interconnecting cam segment and a large part of the auxiliary cam are employed for a fast beginning and end of injection for shaping and increasing the quantities of fuel in the pulse waves pumped for effective high horsepower operation with cleaner exhaust.