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:
Jul. 07, 2020
Filed:
May. 16, 2019
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Masanari Sueoka, Hiroshima, JP;
Atsushi Inoue, Aki-gun, JP;
Keiji Maruyama, Hiroshima, JP;
Takuya Ohura, Hiroshima, JP;
Tomohiro Nishida, Hiroshima, JP;
Yusuke Kawai, Hiroshima, JP;
Tetsuya Chikada, Higashihiroshima, JP;
Tatsuhiro Tokunaga, Aki-gun, JP;
Mazda Motor Corporation, Aki-gun, Hiroshima, JP;
Abstract
A control system of a compression-ignition engine includes an intake variable mechanism and a controller. In a second operating range, the controller controls the intake variable mechanism so that, while partial compression-ignition combustion is performed under an air-fuel ratio (A/F) lean environment, an intake valve open timing takes timing at an advanced side of an exhaust TDC. In a first operating range on a lower load side, the controller controls the intake variable mechanism so that, while the partial compression-ignition combustion is performed under the A/F lean environment, under the same engine speed condition, the intake valve close timing is more retarded within a range on a retarded side of an intake BDC as the engine load decreases, and an absolute value of a change rate of the intake valve close timing to the engine load becomes larger than in the second range.