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:
Feb. 24, 2004
Filed:
Jul. 02, 2002
Ilija Djordjevic, East Granby, CT (US);
Stanadyne Corporation, Windsor, CT (US);
Abstract
In a fuel supply system for an internal combustion engine, a method for controlling fuel quantity delivery from a high pressure, reciprocating piston, engine-driven fuel pump to a high-pressure common rail having a plurality of fuel injection nozzles for injecting fuel into the cylinders of the engine. At least two control regimes are established corresponding to a respective low engine speed pump operation and high engine speed pump operation. During low speed operation, unregulated low pressure fuel is fed to the pumping pistons and at a location between the pistons and the common rail, excess fuel discharged from the pistons is diverted to a location of relatively low pressure in the fuel supply system, upstream of the pistons. During high-speed operation, the quantity of low pressure feed fuel pressurized by the pumping pistons is regulated and all of the fuel discharged from the pistons is delivered to the common rail.