Optics and feedback based volume machining control method for combustion chamber of engine cylinder cover

Abstract

The invention discloses an optics and feedback based volume machining control method for a combustion chamber of an engine cylinder cover. The method comprises the following steps: performing opticalscanning on a combustion chamber of an engine cylinder cover with a cylinder body combination surface to be finely machined, and generating a three-dimensional data model; blocking a valve seat surface, a fuel injector hole and a spark plug hole in the combustion chamber by adopting a virtual plane in the data model, forming a closed space with the cylinder body combination surface of the engine cylinder cover, and calculating the volume of the closed space; calculating plugging volume difference among the virtual plugging plane, an actual valve, a fuel injector and a spark plug as a compensation value of the volume of the closed space to obtain the volume value of the combustion chamber; and calculating a difference value between the combustion chamber volume and the combustion chamber volume target value, and calculating allowance, needing finish milling, of the cylinder body combination surface of the engine cylinder cover according to the difference value and inputting the allowance into macro variables of machining equipment. According to the invention, the volume of the combustion chamber of the cylinder cover to be finely machined can be accurately measured, and the volume of the combustion chamber of the engine cylinder cover can be accurately controlled.

Description

technical field [0001] The invention belongs to the field of engine mechanical processing, and more specifically relates to a method for processing and controlling the volume of an engine cylinder head combustion chamber based on an optical measurement and feedback mechanism. Background technique [0002] With the vigorous development of the automobile industry, laws and regulations are becoming more and more strict on engine emissions, and the engine compression ratio is getting larger and larger, which requires precise control of the combustion chamber volume of the engine. The manufacture of engine cylinder heads involves a composite process of casting and machining, and the process is complex. The volume of the combustion chamber is affected by many process links, which is a difficult point in quality control in the engine manufacturing process. [0003] There are two key points in controlling the volume of the combustion chamber. The first key point is the volume cavit...

AI Technical Summary

Problems solved by technology

For the cylinder head of the engine with large cavity cavity error, the traditional processing is carried out according to the distance determined from the top surface, which cannot guarantee the volume of the engine combustion chamber

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