Method for Adjusting Volume of Combustion Chamber of Engine

摘要

A method for adjusting the volume of the combustion chamber of an engine with high accuracy is provided. A cylinder head (200) of an engine includes a recess (204) constituting part of the combustion chamber of the engine, and a mating surface (202) for a cylinder block. The method for adjusting the volume of the combustion chamber includes measuring a plurality of portions of the surface of the recess (204) and a plurality of portions of the mating surface (202) by using a displacement meter, calculating differences between the respective measurement values of the mating surface (202), and the design shape of the mating surface (202) in a state in which the design shape of the surface of the recess (204) is fitted with respect to the respective measurement values of the recess (204), and deciding the cutting amount of the mating surface (202) based on the calculated differences and cutting the mating surface (202) by the decided cutting amount.

主权项

1. A method for adjusting a volume of a combustion chamber of an engine, comprising:
preparing a cylinder head formed by casting, the cylinder head including a recess constituting part of the combustion chamber of the engine and a mating surface for a cylinder block, and the mating surface being formed to have a cutting stock with respect to three-dimensional shape data of the cylinder head designed to have a target combustion chamber volume, the adjusting method further comprising: measuring a plurality of portions of a surface of the recess and a plurality of portions of the mating surface by using a displacement meter; calculating differences between respective measurement values of the mating surface, and a design shape of the mating surface based on the three-dimensional shape data in a state in which the design shape of the surface of the recess based on the three-dimensional shape data is fitted with respect to a plurality of measurement values of the recess; and deciding a cutting amount based on the calculated differences and cutting the mating surface based on the decided cutting amount.