Title:
INTAKE AIR FLOW RATE DETECTING DEVICE OF INTERNAL COMBUSTION ENGINE
Document Type and Number:
Japanese Patent JP3883921
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To correct a detecting error in an intake air flow rate equivalent to lead heating by heat conduction to a lead from a heat-ray element without being influenced by an intake air system layout when detecting the intake air flow rate on the basis of output voltage of a heat-ray type air flowmeter (AFM).
SOLUTION: The detecting error in the intake air flow rate equivalent to the lead heating is determined as a detecting error in AFM output voltage. Actually, an error initial value VERRINI# and a damping coefficient RELR# are used, and are reduced in a primary delay with the lapse of time, and an AFM output error VERR is set (S1 to S3). The AFM output error VERR is corrected by a correction rate A according to the intake air flow rate (S4 and S5). Actual AFM output voltage US is corrected by an AFM output error VERR' after a correction, and is used for detecting the intake air flow rate Q (S9 to S11).
Inventors:
Takuto Okamoto
Kazuhiko Miya
Hiroshi Hirayama
Yoshihiko Akagi
Iwasakisaki Tetsuya
Hatsoo Nagaishi
Takahiro Sato
Kazuhiko Miya
Hiroshi Hirayama
Yoshihiko Akagi
Iwasakisaki Tetsuya
Hatsoo Nagaishi
Takahiro Sato
Application Number:
JP2002210972A
Publication Date:
February 21, 2007
Filing Date:
July 19, 2002
Export Citation:
Assignee:
株式会社日立製作所
日産自動車株式会社
日産自動車株式会社
International Classes:
F02D45/00; (IPC1-7): F02D45/00
Domestic Patent References:
| JP10078339A | ||||
| JP60053813A | ||||
| JP6272604A |
Attorney, Agent or Firm:
Tomijio Sasashima
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