Engine assembling method

Abstract

The invention discloses an engine assembling method. The engine assembling method comprises the steps that a swing diameter tolerance of a crankshaft connecting rod journal is acquired as a crankshafttolerance; a connecting rod length tolerance is acquired as a connecting rod tolerance; the tolerance of the distance of a piston from a pin hole to the top is acquired as a piston tolerance; crankshafts, connecting rods and pistons are chosen to compose a plurality of first grade assembly groups, and in the first grade assembly groups, the sum of the crankshaft tolerance, the connecting rod tolerance and the piston tolerance is less than a first preset value. The engine assembling method eliminates tolerance superposition so as to guarantee the volumes of various combustion chambers to be precisely consistent, and vibration and abrasion are reduced; the total weight of the assemblies of cylinders is enabled to tend to be consistent, and the consistency of the volumes of the combustion chambers is further guaranteed; the operation of the crankshafts, the connecting rods, the pistons and cylinder bodies are smooth, and the non-smooth operation of the piston caused by the error of a certain assembly is avoided; and the problems of the volume change and sealing of the combustion chambers caused by cylinder mats are solved. Furthermore, by reducing the accessories of the cylinder mats, the engine is simpler and more stable.

Description

technical field [0001] The present invention generally relates to the field of engine assembly, and more particularly, to an assembly method of an engine. Background technique [0002] The assembly of the engine is an important part of the engine manufacturing process, and the engine assembly includes 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 from the inside to the outside. The core components usually include crankshaft, connecting rod, piston, cylinder block and cylinder head. , the connecting rod connects the crankshaft and the piston respectively, and also includes the connecting rod bearing bush, also known as the size bush and the pin. [0003] In the prior art, between the cylinder head surface of the cylinder block and the lower end surface of the cylinder head, a cylinder gasket is usually installed to fi...

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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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