A method of assembling an engine

Abstract

A method for assembling an engine, comprising: obtaining the tolerance of the rotational diameter of the journal of the crankshaft connecting rod as the tolerance of the crankshaft; obtaining the tolerance of the length of the connecting rod as the tolerance of the connecting rod; obtaining the tolerance of the distance from the pin hole to the top of the piston as the tolerance of the piston; selecting the crankshaft , the connecting rod and the piston form a plurality of first-level assembly groups, and the sum of the tolerance of the crankshaft, the tolerance of the connecting rod and the tolerance of the piston in the first-level assembly group is less than a first predetermined value. The present invention eliminates tolerance stacking, thereby ensuring that the volumes of each combustion chamber are exactly the same, reducing vibration and wear; making the total weight of the above-mentioned components of each cylinder tend to be consistent, and further ensuring the consistency of the volumes of each combustion chamber; making the crankshaft, continuous The rod, piston and cylinder run smoothly, avoiding the error of individual components to cause the piston to run smoothly; avoiding the volume change of the combustion chamber and the problem of sealing caused by the cylinder gasket. Furthermore, the cylinder head gasket is reduced to make the engine more concise and stable.

Description

technical field [0001] The present invention generally relates to the field of engine assembly, and more specifically, relates to an engine assembly method. Background technique [0002] Engine assembly is an important part of the engine manufacturing process. Engine assembly includes two parts: the assembly of each assembly and the assembly of the assembly. The steps of general assembly vary with different models and structures, but the principle is based on the cylinder block, which is assembled piece by piece from inside to outside. The core components usually include crankshaft, connecting rod, piston, cylinder block and cylinder head. , the connecting rod is connected to the crankshaft and the piston respectively, and also includes the connecting rod bearing bush, also known as the big and small bush and pin. [0003] In the prior art, a cylinder gasket is usually assembled between the cylinder head surface of the cylinder block and the lower end surface of the cylinde...

AI Technical Summary

Problems solved by technology

[0006] The problems to be solved in the present invention include at least one of the following problems: solve the problem of uneven volume of the combustion chamber of each cylinder of the engine; solve the problem of the engine block, the top dead center of the center of the connecting rod journal, and the coaxial problem of the piston; solve the problem of the cylinder gasket Causes problems with tightness and affects combustion chamber volume

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