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:
Nov. 20, 2012
Filed:
Jul. 30, 2009
Masahiro Toyohara, Hitachiota, JP;
Kazunori Kondo, Hitachinaka, JP;
Satoru Okubo, Hitachinaka, JP;
Takashi Okamoto, Hitachinaka, JP;
Masahiro Toyohara, Hitachiota, JP;
Kazunori Kondo, Hitachinaka, JP;
Satoru Okubo, Hitachinaka, JP;
Takashi Okamoto, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Hitachinaka-shi, JP;
Abstract
There is provided a high pressure fuel pump control system for an internal combustion engine which enables fuel pressure control with high precision without being restricted by the number of cylinders of the internal combustion engine or the number of phase sensor signals and the number of cam noses which vertically drives a plunger of a high pressure fuel pump even when a camshaft phase varies by a variable valve timing mechanism by using the high pressure fuel pump with a solenoid valve. The control system has a means which changes an effective stroke by driving the solenoid valve in the high pressure fuel pump, and has a means which changes the drive timing of the high pressure fuel pump based on a cylinder recognition value of the internal combustion engine with the cam angle detecting means as an origin.