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:
Apr. 07, 2020
Filed:
Mar. 29, 2017
Mazda Motor Corporation, Hiroshima, JP;
Keitaro Ezumi, Hiroshima, JP;
Kazuhiro Takemoto, Hiroshima, JP;
Tomokuni Kusunoki, Hiroshima, JP;
Atsushi Inoue, Hiroshima, JP;
Akitomo Takagi, Hiroshima, JP;
Masanari Sueoka, Hiroshima, JP;
Masami Nishida, Hiroshima, JP;
Kazufumi Kumakura, Hiroshima, JP;
Kota Matsumoto, Hiroshima, JP;
Tomohiro Hasegawa, Hiroshima, JP;
Tadasu Hashiguchi, Hiroshima, JP;
Toshiaki Takahashi, Hiroshima, JP;
Masatoshi Hidaka, Higashi-hiroshima, JP;
MAZDA MOTOR CORPORATION, Hiroshima, JP;
Abstract
Disclosed is a control device for a multi-cylinder engine having a combustion chamber () to which an intake port () and an exhaust port () are connected. The control device comprises: an intake-side variable valve operating mechanism () for controlling a lift timing of two intake valves () of the intake port (); an exhaust-side variable valve operating mechanism () for controlling a lift timing of an exhaust valve (); and an exhaust-side valve operating mechanism () for driving an exhaust valve () at a fixed timing. The control device is operable, when executing cylinder deactivation in a low engine load and low engine speed operating range, to cause the exhaust-side variable valve operating mechanism () to open the exhaust valve () during downward movement of a piston () in a cylinder () being subjected to the cylinder deactivation.