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:
Mar. 09, 2004
Filed:
Mar. 04, 2003
James S. Millar, Chillicothe, IL (US);
Lloyd Thompson, Peoria, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
In some fuel systems, such as those associated with a diesel engine, most if not all of the air that has leaked or been introduced into the fuel system must be evacuated before the fuel injectors can work properly to start the engine. Because such systems often utilize a pressure regulating valve to maintain the fuel system at some pressure, which is often substantially higher than atmospheric pressure, it can be difficult to evacuate air without first raising the air pressure in the fuel system above that which is required to open the pressure regulating valve. In addition, evacuating air from the fuel system can sometimes involve pushing the air through the fuel injectors in order to evacuate the same to the fuel tank. A quick priming fuel system includes air bleed passages that circumvent both the pressure regulating valve and the fuel injectors so that air can be quickly evacuated from the system at a relatively low pressure. These bleed bypass passageways are relatively restrictive to liquid flow so as not to undermine system pressure or otherwise undermine fuel supply to the fuel injectors.