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:
Sep. 08, 1998
Filed:
Feb. 06, 1997
Shigeaki Horiuchi, Fujisawa, JP;
Takeshi Tokumaru, Fujisawa, JP;
Isuzu Motors Limited, Tokyo, JP;
Abstract
This fuel injector for internal combustion engines makes the best use of the responsiveness of a piezoelectric element and the leakage resistance and fixing easiness of a solenoid type fuel injection nozzle, and secures a sufficient lift of a control piston. In this fuel injector, a control piston is connected to and controls a sliding movement of a needle valve, and a return spring provided in a fuel chamber urges the needle valve in the injection port closing direction, the lift of the control piston being controlled by a piezoelectric element which is adapted to be displaced in accordance with voltage variation. The displacement of the piezoelectric element is increased by the effect of lever and fulcrum of a displacement increasing mechanism, and the resultant displacement is transmitted to the control piston, whereby the lift of the control piston and needle valve is secured.