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. 12, 2016
Filed:
Mar. 23, 2011
Applicants:
Yosuke Tanabe, West Bloomfield, MI (US);
Donald J. Mccune, Farmington Hills, MI (US);
Inventors:
Yosuke Tanabe, West Bloomfield, MI (US);
Donald J. McCune, Farmington Hills, MI (US);
Assignee:
Hitachi, Ltd, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B60T 7/12 (2006.01); F02M 59/20 (2006.01); F02D 41/00 (2006.01); F02M 59/36 (2006.01); F02D 41/38 (2006.01);
U.S. Cl.
CPC ...
F02M 59/20 (2013.01); F02D 41/0097 (2013.01); F02M 59/366 (2013.01); F02D 41/3845 (2013.01); F02D 2200/101 (2013.01);
Abstract
A method to reduce engine noise in a multi-cylinder direct injection internal combustion engine. The internal combustion engine includes a high pressure fuel pump having both an inlet valve fluidly connected to a fuel source and an outlet valve typically connected to a pressurized fuel rail. In order to reduce engine noise, especially at low engine speeds, the timing of the opening of either the fuel pump inlet valve or fuel pump outlet valve is varied so that it coincides with the opening of the fuel injectors.