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. 24, 2015
Filed:
Jan. 18, 2011
Susumu Kojima, Susono, JP;
Keisuke Komori, Susono, JP;
Susumu Kojima, Susono, JP;
Keisuke Komori, Susono, JP;
TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota-shi, JP;
Abstract
An object of the invention is to provide a technology enabling to determine the saturation vapor pressure of used fuel in a fuel injection control system for an internal combustion engine equipped with a low pressure fuel pump and a high pressure fuel pump. In the invention, to achieve the object, in the fuel injection control system for an internal combustion engine that controls the duty cycle of the high pressure fuel pump by proportional-integral control based on the difference between the discharge pressure of the high pressure fuel pump and a target pressure, generation of vapor is detected based on a tendency of change in an integral term used in the proportional integral control, and the saturation vapor pressure of used fuel is calculated from the fuel temperature and the engine speed at that time.