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1. (WO2018203360) CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2018/203360    International Application No.:    PCT/JP2017/017109
Publication Date: Fri Nov 09 00:59:59 CET 2018 International Filing Date: Tue May 02 01:59:59 CEST 2017
IPC: F02D 15/04
F02B 75/04
F02D 15/02
F02D 43/00
Applicants: NISSAN MOTOR CO., LTD.
日産自動車株式会社
Inventors: HOSHIKAWA, Hiroaki
星川 裕聡
KANEKO, Kakuzou
金子 格三
MORIGUCHI, Yukinaga
森口 幸長
MURAKI, Kazuo
村木 一雄
Title: CONTROL METHOD FOR INTERNAL COMBUSTION ENGINE AND CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE
Abstract:
According to the present invention, while the wall temperature of an inner circumferential surface (32a) of a cylinder bore (32) is low, the mechanical compression ratio of an internal combustion engine (1) is fixed. Specifically, when a cooling water temperature (Tw) at a water jacket (31a) that is inside a cylinder block (31), which correlates with a cylinder bore wall temperature, is below a prescribed temperature (Twth), the mechanical compression ratio of the internal combustion engine (1) is fixed at a prescribed compression ratio regardless of operating conditions, which keeps a first piston ring (35) from sliding along a corroded portion of the cylinder bore (32) and makes it possible to delay the progress of corrosion.