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. 01, 2004
Filed:
Mar. 19, 2002
Denso Corporation, Kariya, JP;
Abstract
An apparatus for controlling an internal combustion engine calculates a target indicated torque and determines operating degree for engine control actuators such as an air system, a fuel system and an ignition system. The target indicated torque for an idling condition of the engine is calculated based on a constant target indicated power, e.g. the constant target indicated power has a value that corresponds to or slightly overcomes internal and external loss when the engine is in the idling. Although an idling speed control with a feedback control method is inhibited during a transient condition of the engine, the constant target indicated power provides a self-stabilizing to maintain the engine speed constant. As a result, the apparatus maintain the engine speed constant during the idling even external disturbance is applied to the engine.