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. 22, 2005
Filed:
Oct. 28, 2004
Yushi Fukuda, Chiryu, JP;
Yushi Fukuda, Chiryu, JP;
Denso Corporation, Kariya, JP;
Abstract
When a learning condition is satisfied, control device performs a feedback control. In the feedback control, a metering valve control value is progressively increased to progressively increase a degree of opening of an inlet metering valve, and a pressure of a common rail is kept constant. When the amount of change in a pressure-reducing valve control value becomes equal to or less than a predetermined value, a current metering valve control value, which is currently supplied to the inlet metering valve, is obtained as a maximum discharge rate control value. Also, an intake initiation control value, at which a high pressure pump begins intake of fuel, is obtained. Then, based on these values, a pump characteristic is obtained. Thereafter, the control device obtains the metering valve control value based on a computed degree of opening of the inlet metering valve and the pump characteristic.