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. 28, 2021
Filed:
Mar. 19, 2018
Mazda Motor Corporation, Hiroshima, JP;
Takahiro Yamamoto, Hiroshima, JP;
Toshiaki Nishimoto, Hiroshima, JP;
Takaya Okugawa, Hiroshima, JP;
Takafumi Nishio, Otake, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Abstract
A control device for an engineincluding cylinders, and configured to perform a reduced-cylinder operation by idling some of cylinders. The control device includes a hydraulic valve-stopping mechanismwhich closes the intake and exhaust valvesof the cylinders in response to establishment of the reduced-cylinder operation execution condition, a hydraulic variable valve timing mechanismcapable of changing a phase of the exhaust valveof the engine, and an ECUwhich controls the valve-stopping mechanismand the hydraulic variable valve timing mechanism. In response to establishment of the reduced-cylinder operation execution condition, the ECUallows the hydraulic variable valve timing mechanismto execute the phase change to the exhaust valve, and subsequently allows the valve-stopping mechanismto bring the intake and exhaust valvesof the cylinders into closed state.