Experimental device and method based on rapid compressor

Abstract

The invention provides an experimental device and method based on a rapid compressor. The device comprises a compression cylinder, a combustion component, a trigger device, a position sensor and a signal generator, wherein thecompression cylinder comprises a cylinder barrel with a through hole and a piston movably inserted into the through hole; the combustion component is connected to the first end of the cylinder barrel in a sealed mode, and a combustion chamber communicating with the through hole is formed in the side, close to the cylinder barrel, of the combustion component; the trigger device is mounted on the side wall of the combustion chamber; the position sensor is mounted on the cylinder barrel and is suitable for sensing the position of the piston; and the signal generator is in communication connection with the position sensor and the triggering device. The trigger time of the trigger device is accurately controlled, a data model between the trigger time and engine knock can be established, the engine knock phenomenon can be deeply researched and utilized, and then the heat efficiency of the engine is improved. Meanwhile, the experimental device can also be applied to other combustion researches depending on accurate trigger.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to an experimental device and method based on a fast compressor. Background technique [0002] With the development of engine technology and the competition in domestic and foreign markets, it is urgent for engines to further improve thermal efficiency to reduce fuel consumption. Increasing the compression ratio is the most direct and effective means to improve the thermal efficiency of the engine. However, with the further increase of the compression ratio, the engine will face the problem of knocking. When knocking occurs, the combustion of the engine deteriorates rapidly, and there will be violently oscillating pressure waves in the combustion chamber. Higher knocking can even destroy the engine in one cycle. It is generally believed that the essence of knocking is the spontaneous combustion phenomenon in the combustion process in the cylinder, so the research on the spontaneous...

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Problems solved by technology

Engine experiments show that as the ignition timing advances, the tendency of the mixture to knock will increase. However, the triggering timing of the mixture in the engine in the prior art has a large chance and cannot be precisely controlled, which is not conducive to further research.

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