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:
Sep. 12, 2006
Filed:
Nov. 17, 2005
Tomohiro Nishi, Saitama-ken, JP;
Masanobu Asakawa, Saitama-ken, JP;
Toshitaka Hachiro, Saitama-ken, JP;
Manabu Niki, Saitama-ken, JP;
Tomohiro Nishi, Saitama-ken, JP;
Masanobu Asakawa, Saitama-ken, JP;
Toshitaka Hachiro, Saitama-ken, JP;
Manabu Niki, Saitama-ken, JP;
Honda Motor Co., Ltd., Tokyo, JP;
Abstract
A control system for a variable-cylinder internal combustion engine, which is capable of attaining excellent fuel economy by executing a partial-cylinder operation mode as long as possible, while suppressing vibration and noise during the partial-cylinder operation mode. A control system switches the operation mode of a variable-cylinder internal combustion engine between an all-cylinder operation mode in which all of a plurality of cylinders (#to #and #to #) are put in operation, and a partial-cylinder operation mode in which some (#to #) of the plurality of cylinders are deactivated. During the partial-cylinder operation mode, the control systemcalculates a degree-of-continuation parameter SDTQCSNH indicative of a degree of continuation of a state where detected load TQECMDF on the engine is within a predetermined range of load between a first reference value TQCSNH and a second reference value TQCSEH smaller than the first reference value (stepsto), and determines whether or not the operation mode should be switched to the all-cylinder operation mode, based on the degree-of-continuation parameter SDTQCSNH (step).