Rapid compressor test platform for laboratory and adjustment method of compression ratio

Abstract

The invention discloses a rapid compressor experimenting platform for a laboratory. The rapid compressor experimenting platform comprises a combustion chamber unit, a brake cylinder unit and a driving cylinder unit. The brake cylinder unit comprises a brake cylinder body, a brake cylinder rear cover and a brake piston, a first connecting rod is connected between the brake piston and a combustion chamber piston, and the lower stop point position of the brake piston is determined by the position of the brake cylinder rear cover. The driving cylinder unit comprises a driving piston, and a second connecting rod is connected between the driving piston and the brake piston. A plurality of compression ratio adjusting gaskets capable of being arranged between the brake cylinder rear cover and the brake cylinder body are arranged. Each compression ratio adjusting gasket is composed of a pair of cohesive semicircular gasket bodies, and the total thickness of the arranged compression ratio adjusting gaskets is determined according to the lower stop point position of the combustion chamber piston under the premise that the upper stop point position of the combustion chamber piston is kept unchanged. According to the rapid compressor experimenting platform for the laboratory, the gaskets are additionally arranged at the brake cylinder rear cover to change the initial position of the combustion chamber piston and maintain the volume of a clearance unchanged so as to adjust the compression ratio.

Description

technical field [0001] The invention relates to a method for realizing compression ratio adjustment on a fast compressor experimental device, relates to the field of internal combustion engine combustion, and specifically relates to a basic experimental device for studying fuel spontaneous combustion and flame propagation characteristics. Background technique [0002] The consumption of fossil fuels by human transportation activities has exacerbated the energy crisis, and at the same time caused a large amount of carbon dioxide emissions, which is also one of the main reasons for the greenhouse effect. In order to meet the increasingly stringent carbon dioxide emission regulations, gasoline engine miniaturization is a new technical means to improve engine efficiency by increasing the compression ratio and intake boost. However, small enhancements will cause engine knocking problems. When knocking occurs, the thermal efficiency of gasoline engines will decrease, accompanied b...

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Problems solved by technology

However, small enhancements will cause engine knocking problems. When knocking occurs, the thermal efficiency of gasoline engines will decrease, accompanied by strong pressure fluctuations, which will cause mechanical damage and ablation of the engine in severe cases.

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