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. 05, 2009
Filed:
Jul. 02, 2008
Atsushi Watanabe, Novi, MI (US);
Atsushi Hohkita, Novi, MI (US);
Masahiro Soma, Danville, KY (US);
Hiroaki Saeki, West Bloomfield, MI (US);
Atsushi Watanabe, Novi, MI (US);
Atsushi Hohkita, Novi, MI (US);
Masahiro Soma, Danville, KY (US);
Hiroaki Saeki, West Bloomfield, MI (US);
Hitachi, Ltd, Tokyo, JP;
Abstract
An apparatus for attenuating fuel pump noise in a direct injection internal combustion engine. In one proposal, the direct injection fuel nozzle is suspended from a fuel rail in a fashion that avoids direct metal-to-metal contact between the injector and the engine block. The direct injection nozzle may also be connected to the fuel rail by a pair of spaced-apart seals which equalize the longitudinal pressure on the nozzle during operation. Enlarged diameter fuel reservoirs and/or a restricted orifice may be provided fluidly in series between the fuel pump and the direct injection nozzle in order to attenuate noise resulting from fuel pump pulsation. A clip holder and clip plate mount the fuel injector to the injector cup.