A Engine-Hydraulic Dual Power Output Variable Compression Ratio Engine

Abstract

The invention discloses a variable compression ratio engine adopting mechanical-hydraulic double-power output. The engine comprises a cylinder body (10) and a crank case (3), wherein a middle body (4) is connected between the cylinder body (10) and the crank case (3), a hydraulic system connecting the cylinder body (10) and the crank case (3) is arranged in the middle body (4), the hydraulic system is used for transmitting fuel gas force in the cylinder body (10) to the crank case, and the hydraulic system is connected with a hydraulic adjustment device. The compression ratio can be statically adjusted according to changes of the rotating speed and load, the compression ratio is increased to improve the thermal efficiency of a gasoline engine under the work conditions of low speed and small load, the compression ratio is reduced to reduce the pressure and the temperature of the inside of the cylinder body under the work conditions of high speed and large load, and detonation is avoided. Besides, at different stages of the working process, the piston movement speed is dynamically adjusted, the piston movement speed is reduced in the scavenging process to prolong the scavenging process, and the piston movement speed is increased in the compression process to shorten the compression process.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, and specifically relates to an engine-hydraulic dual power output variable compression ratio engine, which can realize the change of the compression top dead center position of the piston through the adjustment of the hydraulic system, and output mechanical energy and hydraulic energy at the same time. Background technique [0002] With the rapid increase of the number of automobiles, the pollution caused by automobile exhaust emissions has become increasingly prominent, seriously threatening human health and destroying ecological balance. On the other hand, the oil energy consumed by the internal combustion engine as the main power source of the automobile accounts for more than 70% every year. Apparently, in today's society where the energy crisis and environmental problems are deteriorating, the engine as a vehicle power is facing unprecedented challenges. In this regard, ...

AI Technical Summary

Problems solved by technology

At present, many automobile companies and research institutions in the world are conducting research on engine VCR technology, but due to factors such as cost, structural applicability, and manufacturability, there is still no large-scale market application. The research and development of a new generation of VCR engine solutions with a more compact structure and reasonable manufacturing costs , is an important research direction for the development of this technology

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