Assembly method of variable compression ratio drive structure

Abstract

The invention provides an assembly method of a variable compression ratio drive structure, the variable compression ratio drive structure drives the eccentric shaft in the variable compression ratio mechanism to rotate, and includes a harmonic reducer fixed on the engine block unit, and the motor unit fixed on the rigid wheel in the harmonic reducer unit, the assembly method includes first installing the rigid wheel, flexible wheel and eccentric shaft, and then installing them into the engine block, Then install the wave generator, the timing cover and the motor unit, and complete the sealing between the motor unit and the timing cover with the installation of the motor unit. The assembling method of the invention can realize the assembling of the variable compression ratio driving structure, and the assembling is relatively simple, can improve the assembling precision, and is beneficial to the reliable setting of the driving structure.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a method for assembling a variable compression ratio drive structure. Background technique [0002] In order to reduce engine displacement, improve fuel combustion efficiency and fuel economy, variable compression ratio technology emerged as the times require. With the continuous development of variable compression ratio technology, compression ratio adjustment forms are becoming more and more diverse. Among them, the multi-link variable compression ratio mechanism that uses the eccentric shaft to cooperate with the multi-link mechanism to drive the eccentric shaft to rotate through the multi-link mechanism, thereby realizing the change of the top dead center of the engine piston, has become a lot of car companies. focus of research and development. [0003] In the current multi-link variable compression ratio mechanism, the matching structure of the motor and the harmonic reduc...

AI Technical Summary

Problems solved by technology

The existing structural form leads to a large overall width of the engine, which is not conducive to the vehicle. In addition, in the side-mounted motor structure, it is necessary to leave a motor installation space or process a motor installation bracket during the processing of the cylinder body, which also makes the cylinder body structure more complex. Complex and difficult to process

In addition, in the current variable compression ratio mechanism, the drive structure also has the problem of complicated assembly and difficult to guarantee the assembly accuracy.

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