公开(公告)号：US20190101064A1

公开(公告)日：2019-04-04

申请号：US16086520

申请日：2017-03-29

Applicant: MAZDA MOTOR CORPORATION

Inventor： Keitaro EZUMI ,  Kazuhiro TAKEMOTO ,  Tomokuni KUSUNOKI ,  Atsushi INOUE ,  Akitomo TAKAGI ,  Masanari SUEOKA ,  Masami NISHIDA ,  Kazufumi KUMAKURA ,  Kota MATSUMOTO ,  Tomohiro HASEGAWA ,  Tadasu HASHIGUCHI ,  Toshiaki TAKAHASHI ,  Masatoshi HIDAKA

IPC: F02D13/02 ,  F01L9/02 ,  F02D13/06 ,  F01L1/344 ,  F02D41/00

Abstract: Disclosed is a control device for a multi-cylinder engine having a combustion chamber (19) to which an intake port (16) and an exhaust port (17) are connected. The control device comprises: an intake-side variable valve operating mechanism (71) for controlling a lift timing of two intake valves (21a, 21b) of the intake port (16); an exhaust-side variable valve operating mechanism (72) for controlling a lift timing of an exhaust valve (22a); and an exhaust-side valve operating mechanism (73) for driving an exhaust valve (22b) 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 (72) to open the exhaust valve (22a) during downward movement of a piston (14) in a cylinder (18) being subjected to the cylinder deactivation.