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. 07, 2015
Filed:
Feb. 14, 2012
Yoshimitsu Takashima, Anjo, JP;
Yoshimitsu Takashima, Anjo, JP;
Denso Corporation, Kariya, JP;
Abstract
A defective-portion detector has a detecting portion which detects a variation in fuel pressure as a fuel pressure waveform based on a detection value of a fuel pressure sensor and a computing portion which computes, based on the fuel pressure waveform, a plurality of injection-rate parameters required for identifying an injection-rate waveform corresponding to the fuel pressure waveform. Further, the detector has a determining portion which determines whether each learning value of the injection-rate parameters is an abnormal value and an identifying portion which identifies a defective portion in the fuel injection system based on a combination of abnormal learning values which the determining portion has determined.