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. 05, 2002
Filed:
Jul. 11, 2000
Yoshihiko Onishi, Tokyo, JP;
Masayasu Miyajima, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In a variable delivery fuel supply device providing a stable control of fuel pressure without being influenced by a scattering of control of an electromagnetic valve and without causing an increase of temperature in the coil of the electromagnetic valve, the variable delivery fuel supply device comprises fuel injection valves for injecting fuel to respective cylinders of an internal combustion engine, a fuel pump which sucks fuel from a fuel intake passage through an intake valve into a pressurizing chamber by a reciprocating movement of a plunger in a cylinder and discharges the pressurized fuel into the delivery pipe through a discharge valve an electromagnetic valve which is located in a relief passage communicating the pressurizing chamber of the fuel pump with the fuel intake passage and is adapted to control a discharge quantity of fuel by relieving the pressurized fuel in the pressurizing chamber at the time of opening the valve, and a control unit for supplying a valve-opening signal to the electromagnetic valve wherein the supply of the valve-opening signal from the control unit to the electromagnetic valve is stopped when the plunger reaches a predetermined position which passes through a top dead point, in an intake stroke of the plunger from a top dead point to a bottom dead point.