Piston motion displacement measurement system for free piston compression combustion device

Abstract

The invention discloses a piston motion displacement measurement system for a free piston compression combustion device, which relates to the engine field. The system comprises an optical device, a photoelectric sensor device, a cylinder, a heavy object, etc. The heavy object slides on the guide rail of a support frame and is connected with a driving device through a rope; the cylinder is installed at the lower part of the support frame; the upper end of the piston rod of the cylinder is fixed with a transverse metal short rod and connected with the optical device through a safety rope; the main body of the optical device is a shaft; the left end of the shaft is fixedly connected with a runner; one end of the safety rope is fixed on the outer circle of the runner; the right end of the shaft is fixed with an optical mirror; the middle of the shaft is a torque driving mechanism; and the photoelectric sensor device transmits signal light to the optical mirror and then receives reflectionsignals of the optical mirror. Through application of mechanical structure design and a photoelectric testing technology, the cost of the sensor in the traditional engine testing device is greatly reduced, and through optical amplification, the measurement precision is improved.

Description

technical field [0001] The invention belongs to the technical field of internal combustion engines, in particular to a piston movement displacement measurement system of a free piston compression combustion device. Background technique [0002] In order to improve the combustion efficiency of the combustible mixture, the fuel combustion method is more inclined to the homogeneous charge compression ignition (HCCI) method. If this new type of engine combustion method uses the compression of the piston to make the mixture gas reach the self-ignition temperature and burn, the study found that This combustion method can not only reduce the emission of pollutants, but also has excellent combustion characteristics such as simultaneous ignition of multiple points and rapid combustion. However, the current implementation methods of homogeneous compression ignition are insufficient, and the research on the maximum explosion pressure that can be achieved by compression ignition is insu...

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Problems solved by technology

[0003] In view of the above deficiencies, the present invention proposes a piston movement displacement measurement system of a free piston compression combustion device, which solves the problem of displacement, velocity and acceleration data acquisition accuracy in the free piston compression combustion process, and at the same time greatly reduces the cost of the sensor

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