STRUCTURE OF COMBUSTION CHAMBER IN INTERNAL COMBUSTION ENGINE

Title:

STRUCTURE OF COMBUSTION CHAMBER IN INTERNAL COMBUSTION ENGINE

Document Type and Number:

Japanese Patent JP2023160254

Kind Code:

A

Abstract:

To reduce a cooling loss through mirror-like finishing of a wall face configuring a combustion chamber and to prevent an increase in unburnt fuel and aggravation of knock resistance due to a reduction in gas turbulence in a squish area.SOLUTION: An internal combustion engine has: a combustion chamber 5 between a combustion chamber wall face 2 on a side of a cylinder head 1 and a crest face of a piston; an ignition plug 6 at an almost center of the combustion chamber 5 when seen in a direction of a cylinder shaft; and a squish area on a periphery section of the combustion chamber 5. Surfaces of an intake valve 7 and an exhaust valve 9 facing the combustion chamber 5 have mirror property with Ra of 0.3 or less. A surface of a squish area face 12 configuring the squish area has mirror property with Ra of 0.4 to 0.7.SELECTED DRAWING: Figure 3

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Inventors:

SUZUKI TAKUMA

Application Number:

JP2022070471A

Publication Date:

November 02, 2023

Filing Date:

April 22, 2022

Export Citation:

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Assignee:

NISSAN MOTOR
RENAULT SAS

International Classes:

F02B23/08; F01L3/20; F02F1/24

Attorney, Agent or Firm:

Hiromichi Kobayashi
Kiyoshi Tomioka

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