For example, Chery has built an engine with a thermal efficiency as high as 37.5%, which has surpassed many joint venture products. Geely and Volvo have built a three-cylinder 1.5T engine that is not inferior to the joint venture brand in terms of parameters. But in the field of real high-end engines, China is almost blank, such as variable compression ratio engines.
At present, only Nissan has put the variable compression ratio engine on the mass production model, and its Teana and finidi QX50 models are equipped with its 2.0T variable compression ratio engine, which can be said to give consideration to efficiency, economy and power.
However, according to the documents exposed by the State Patent Office, the domestic variable compression ratio is on the way, and Great Wall Motor has applied for a series of patents on variable compression ratio engines, including the mechanism design, control mode and structural design of related components of various variable compression ratio engines.
Technically, the Great Wall variable compression ratio engine is the same as Nissan's, and the compression ratio is adjusted by adding an adjustable lever mechanism between the connecting rod and the crankshaft.
But in implementation, the Great Wall is controlled by an eccentric wheel and two movable adjusting rods, which is different from Nissan.
Of course, this is still in the patent state, and it is still unknown when it will be successfully developed and mass-produced.
But in any case, it is admirable for the Great Wall to make such an attempt in technology. At least variable compression ratio engines are likely to represent the future of internal combustion engines.
This article comes from car home, the author of the car manufacturer, and does not represent car home's position.