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:
Apr. 24, 1979
Filed:
Dec. 29, 1977
James A Wade, Columbus, IN (US);
Edward D Smith, Greensburg, IN (US);
Cummins Engine Company, Inc., Columbus, IN (US);
Abstract
The disclosure illustrates a fuel control valve for a fuel system of a compression ignition engine which utilizes unit fuel injectors operating on the principle that the fuel pressure applied to the injectors determines the quantity of fuel injected into the engine cylinders. The fuel control valve is connected in the supply line for half of the injectors of the engine. The valve has a plunger which blocks off flow to these injectors whenever the fuel system pressure is below a predetermined level. When the pressure exceeds that level, the plunger displaces to a position where it permits flow to the injectors and offers a minimum restriction to flow. The pressure level is set at a level which reflects engine operation above idle but below normal engine operating conditions. The net effect is to substantially reduce the generation of white smoke during engine startup and while idling for extended periods of time while not affecting normal engine operating conditions. The selective termination of fuel to a portion of the cylinders has a beneficial effect on other engine emissions.