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1. (WO2018180129) SPARK-IGNITION INTERNAL COMBUSTION ENGINE

Pub. No.:    WO/2018/180129    International Application No.:    PCT/JP2018/007278
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Feb 28 00:59:59 CET 2018
IPC: F02B 23/08
F02B 31/08
F02F 1/42
F02F 3/26
Applicants: MAZDA MOTOR CORPORATION
マツダ株式会社
Inventors: AOKI, Shuma
青木 秀馬
MURANAKA, Hiroaki
村中 宏彰
YAMAGUCHI, Naohiro
山口 直宏
WADA, Yoshitaka
和田 好隆
Title: SPARK-IGNITION INTERNAL COMBUSTION ENGINE
Abstract:
Provided is a spark-ignition internal combustion engine in which a raised portion (31) comprising an intake-side inclined surface (34) and an exhaust-side inclined surface (35) is provided to the top face (10) of the piston (5), and a cavity (40) is provided on the raised portion (31) in a position that corresponds to the spark plug, wherein the intake-side inclined surface (34) and the exhaust-side inclined surface (35) are formed such that the inclination angle of the exhaust-side inclined surface (35) is smaller than the inclination angle of the intake-side inclined surface (34), and such that the difference between the inclination angles of the intake-side inclined surface (34) and the exhaust-side inclined surface (35) is 4 degrees or larger.