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:
Jun. 17, 1997
Filed:
Sep. 27, 1994
Ken Ogawa, Wako, JP;
Yoshikazu Oshima, Wako, JP;
Honda Giken Kogyo K.K., Tokyo, JP;
Abstract
A control system for an internal combustion engine comprises an ECU which calculates an amount of fuel to be supplied to the engine and determines a direct supply ratio and a carry-off ratio, based on operating conditions of the engine. The direct supply ratio is a ratio of a fuel amount directly drawn into the engine in a predetermined operating cycle of the engine to the whole fuel amount injected in the same operating cycle, and the carry-off ratio is a ratio of a fuel amount carried off the inner surface of the intake pipe and drawn into the engine in the predetermined operating cycle to the whole fuel amount which adhered to the inner surface of the intake pipe in an operating cycle immediately preceding the predetermined operating cycle. An adherent fuel amount which is to adhere to the intake pipe inner surface in the predetermined operating cycle is estimated based on the direct supply ratio and the carry-off ratio, and the carried-off fuel amount is estimated based on the direct supply ratio and the adherent fuel amount. The supply fuel amount is corrected based on the estimated adherent fuel amount and carried-off fuel amount, and then the corrected fuel amount is injected into the engine. The direct supply ratio and the carry-off ratio are corrected when the two ratios are in a predetermined relationship.