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. 18, 1989
Filed:
Nov. 09, 1987
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An electronic fuel injection device for pumping fuel to an internal-combustion engine by using the expansion-contraction characteristics of a piezoelectric device. The electronic fuel injection device has a pump member integrally formed and having a number of pistons corresponding to the number of cylinders of the associated internal-combustion engine, and a single actuator for driving the pump member. Accordingly, the same pressure is generated in all of the pump chambers when the pump member is driven by the actuator for each fuel injection cycle. Each pump chamber is connected to a fuel feed passage connected to a fuel tank and to a fuel injection passage connected to a fuel injection nozzle, and is filled with the fuel. The pump chambers are pressurized uniformly to distribute the fuel uniformly to the cylinders regardless of the passage characteristics of the fuel injection passages.