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:
May. 07, 2019
Filed:
Aug. 02, 2017
Fujitsu Ten Limited, Kobe-shi, Hyogo, JP;
Masatoshi Hagiwara, Kobe, JP;
FUJITSU TEN Limited, Kobe-shi, JP;
Abstract
An engine control device of a vehicle engine includes a processor that detects an operation state of the engine and controls an output of a heater which heats an intake air oxygen concentration sensor detecting oxygen concentration of intake air of the engine. The intake air includes a portion of exhaust gas recirculated to an intake passage of the engine as EGR gas. The processor controls the output of the heater, according to a detected operation state of the engine, so that the intake air oxygen concentration sensor enters one of (i) an active state where a temperature of the intake air oxygen concentration sensor becomes greater than or equal to an activation temperature, (ii) a semi-active state where the sensor temperature is lower than the activation temperature and higher than an inactivation temperature, and (iii) an inactive state where the sensor temperature is lower than the inactivation temperature.