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:
Jan. 09, 2018
Filed:
Feb. 15, 2011
Hiroaki Takeishi, Obu, JP;
Takashi Senda, Niwa-gun, JP;
Mitsuo Hara, Ichinomiya, JP;
Takanobu Kawano, Obu, JP;
Hiroaki Takeishi, Obu, JP;
Takashi Senda, Niwa-gun, JP;
Mitsuo Hara, Ichinomiya, JP;
Takanobu Kawano, Obu, JP;
DENSO CORPORATION, Kariya, JP;
Abstract
An ECU controls waste heat quantity of an engine according to a required heat quantity in response to a heat-utilize requirement. The ECU controls a valve opening period of an intake valve based on an engine driving condition and an ignition timing based on a most efficient timing at which fuel economy is highest. The ECU determines whether there is an ignition advance margin relative to the most efficient timing. When there is no margin, an actual compression ration of the engine is decreased by advancing or retarding a valve close timing of the intake valve and the ignition timing is advanced relative to the most efficient timing in order to increase the waste heat quantity.