Modelling the Pneumatic Start of a Piston Engine

Providing a reliable run-up is a relevant task in the development of reciprocating internal combustion engines. Pneumatic start systems are used for running-up marine and medium or high power cargo engines. The article presents the calculation methods for in-cylinder processes when high-pressure air is supplied, with simultaneous calculation of the dynamics of the engine acceleration until a stable rotation frequency of the crankshaft is achieved. The program based on Euler numerical methods is implemented. Using this program, the analysis of influence of the pneumatic start system parameters on the main characteristics of the engine run-up can be performed.

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