COMBUSTION CHAMBER STRUCTURE FOR ENGINE

Japanese Patent JP2022083615

A

To provide a combustion chamber structure for an engine capable of improving engine output while suppressing knocking.SOLUTION: A combustion chamber 6 for an engine is defined by a crown surface 50 of a piston 5, the inner wall surface of a cylinder 2 and a pent-roof type ceiling surface 6U. The crown surface 50 includes an exhaust side bottom part 51 arranged near the edge on the exhaust side, an intake side bottom part 52 arranged near the edge on the intake side, an exhaust side inclined surface 53 rising from the exhaust side bottom part 51 to the center part of the crown surface 50, an intake side inclined surface 54 rising from the intake side bottom part 52 to the center part of the crown surface 50, and a plane 55 and an inter-recess plane 56, the plane 55 being provided continuously between the upper end of the exhaust side inclined surface 53 and the upper end of the intake side inclined surface 54, and extending from the center part of the crown surface 50 in the direction perpendicular to a cylinder axis AX, the inter-recess plane 56 being arranged between a pair of recess parts 531 of the exhaust side inclined surface 53 and continuous with the plane 55 in the same plane.SELECTED DRAWING: Figure 8

ROKUTA KAZUYA
WATANABE TOMOMI
ODA YUSUKE
WADA YOSHITAKA

JP2020195036A

June 06, 2022

November 25, 2020

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MAZDA MOTOR

F02B23/10; F02B23/08; F02F3/24

Masataka Kotani
Etsushi Kotani
Haruhiro Hirata

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