Title:
SHIP PROPULSION MACHINE, SHIP AND SHIP ENGINE
Document Type and Number:
Japanese Patent JP2023073137
Kind Code:
A
Abstract:
To provide: a ship propulsion machine capable of curbing generation of ω-swirl in a combustion chamber of an engine; a ship including the ship propulsion machine; and a ship engine included in the ship propulsion machine.SOLUTION: A ship propulsion machine includes an engine 20 and a propeller driven with the engine 20. The engine 20 has: a cylinder head 29 provided with a combustion chamber 28 and a pair of intake openings 63 communicated with the combustion chamber 28; and a pair of intake ports 55 respectively connected to the pair of intake openings 63. In the pair of intake ports 55, a clearance D between downstream sections 55A connected to the intake openings 63 is reduced with the decreasing distance toward the intake openings 63.SELECTED DRAWING: Figure 5
Inventors:
KASAI SHINYA
KIWAKI SATOSHI
KIWAKI SATOSHI
Application Number:
JP2021185986A
Publication Date:
May 25, 2023
Filing Date:
November 15, 2021
Export Citation:
Assignee:
YAMAHA MOTOR CO LTD
International Classes:
F02F1/42; B63H20/32; B63H21/14; F02B31/04
Attorney, Agent or Firm:
Patent Attorney Corporation Ai Patent Office
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