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:
Dec. 19, 1995
Filed:
May. 05, 1994
Yukio Tomiita, Anjo, JP;
Hideo Kiuchi, Aichi, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
A valve element is slidably disposed in a guide bore in a valve casing, forming a fuel injection valve which is opened or closed by means of a valve seat of the valve casing and a contact portion of the valve element. When the valve element is in the valve open position, a first fuel adjusting passage is formed between the valve seat and the contact portion. A sliding contact portion is provided on the upstream side of the contact portion of the valve element, and a brim portion is provided on the further upstream side thereof. Flat portions are formed on the outer peripheral surface of the sliding contact portion, and adjusting surfaces are formed on the outer peripheral surface of the brim portion. Second fuel adjusting passages are formed between the fuel adjusting surfaces of the brim portion and the guide bore, and third fuel adjusting passages are formed between the flat portions of the sliding contact portion and the guide bore. The relationship between the pressure loss percentage P2 of the second fuel adjusting passages and the pressure loss percentage P3 of the third fuel adjusting passages is determined as P2 .gtoreq.P3.gtoreq.6% of the total pressure loss.