The structural evolution of Bare Engine

As one of the key components of Bare Engine, the connecting rod needs to withstand the rapid changes in piston load and inertia force during the operation of the engine, making the working environment of the connecting rod particularly complex.

With the rapid development of China's manufacturing industry in the past 30 years, the connecting rod has now achieved domestic production.

The flat-cut connecting rod is the earliest manufacturing form of the connecting rod. The connecting surface between the connecting rod and the cover is cut-finished, and the positioning methods include pin positioning, sleeve positioning, tooth positioning and shoulder positioning.

The connecting surface between the connecting rod and the cover needs to be processed multiple times, and the bolt holes and threads of the connecting rod need to be processed separately.

This type of connecting rod has many processing processes, the connecting surface between the rod and the cover has matching accuracy and processing accuracy errors, and the secondary connection roundness of the connecting rod is poor.

The connecting rod fracture technology, also known as the connecting rod fracture technology, is a new connecting rod manufacturing technology developed and matured in developed countries with automobile industries in the 1990s. It is a major change in traditional connecting rod processing technology and has become an important symbol of the development level of the country's Mitsubishi Engine manufacturing industry.

At the beginning of the 21st century, China introduced the connecting rod breaking technology into China, and carried out corresponding technical research and development and mass production.

Connecting rod breaking is a breaking processing technology, which can reduce the processing by more than 35% and has high production efficiency. Due to the original configuration of the cover and the rod after breaking, the seamless connection between the rod and the cover greatly improves the accuracy of its secondary combination.