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:
May. 29, 2001
Filed:
Jul. 05, 2000
Yoshihiko Onishi, Tokyo, JP;
Masayasu Miyajima, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A variable delivery fuel supply device comprising fuel injection valves,through,injecting a fuel to cylinders of a combustion engine, a fuel pump,taking the fuel in a pressurization chamber,from a fuel intake passage,through an intake valve,, pressurizing the fuel, and discharging thus pressurized fuel from a discharge valve,by a reciprocal motion of a plunger,inside a cylinder, an electromagnetic valve,formed in a relief passage,connecting the pressurization chamber,of the fuel pump,to the fuel intake passage,for controlling a discharge quantity by relieving the pressurized fuel inside the pressurization chamber,at the time of opening the injection valves, and a control means,applying a valve-opening signal to the electromagnetic valve,, wherein a width of a time of the valve-opening signal, applied to the electromagnetic valve,from the control means,is always set at a constant with respect to a period of the reciprocal movement of the plunger,whereby a temperature of a coil can be suppressed without an influence of responsiveness of the electromagnetic valve, and a fuel pressure can be constantly and stably controlled.