Hydraulic drive type rapid compression expansion machine and control method thereof

Abstract

The invention discloses a hydraulic drive type rapid compression expansion machine. The hydraulic drive type rapid compression expansion machine comprises a hydraulic pump station system and a combustion chamber system, and the hydraulic pump station system comprises a hydraulic cylinder, an oil tank, an overflow valve, a pressure relief valve, a pressure relief pipeline, an overflow pipeline, a first pipeline and a second pipeline; a main pump, a one-way valve, a pressure gauge, a first energy accumulator group, a second energy accumulator group and a rod cavity proportional valve are sequentially arranged on the first pipeline from an oil tank to a rod cavity oil inlet; a rodless cavity proportional valve is arranged on the second pipeline; the end, connected with the first pipeline, of the second pipeline is located between the first energy accumulator group and the second energy accumulator group; and the hydraulic cylinder comprises a cylinder body, a hydraulic piston, a hydraulic cylinder rod, a rodless cavity oil inlet and the rod cavity oil inlet, the rodless cavity oil inlet and the rod cavity oil inlet are formed in the cylinder body, the hydraulic piston is installed in the cylinder body, and a compression piston is arranged at the end, away from the hydraulic piston, of the hydraulic cylinder rod and installed in the combustion chamber system in a sliding mode. Operation is simpler and more efficient, rapid response and accurate control are achieved, and the high rack adaptability is achieved.

Description

[0001] = technical field [0002] The invention relates to the technical field of thermal energy and power engineering testing, in particular to a hydraulically driven rapid compression expander and a method for using the same. Background technique [0003] Internal combustion engines have the advantages of compact structure, high thermal efficiency, and convenient operation and maintenance. Compared with battery technology, internal combustion engines have significant advantages in energy density. However, the problems of energy shortage and environmental degradation have prompted researchers in the field of internal combustion engines around the world to continuously pursue internal combustion engines. New technologies to meet the new requirements of internal combustion engines in energy and environmental issues. The thermal efficiency and emissions of internal combustion engines are closely related to their combustion process. The combustion process is affected by factors i...

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Problems solved by technology

[0004] The actual working process of the internal combustion engine is often very complicated and accompanied by cyclic changes, which makes it difficult to accurately control the boundary conditions and the repeatability of the test results when studying the combustion process in the engine cylinder.

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