Influence of engine torque fluctuations on performance characteristics of pumps mounted on vehicles

Takuma Kawahara*, Hideaki Takamiya, Hitoshi Motono, Yasuhiro Hotta, Kazuyoshi Miyagawa

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


A fire pump mounted on the fire engine is driven by a car engine. The engine has plurality of combustion chambers and converts the reciprocating motion of the pistons into rotational motion while shifting the combustion timing of each combustion chambers. When the force generated by the combustion is converted into torque, periodic torque fluctuation is generated. Torque fluctuation finally generates the rotation fluctuation. We analyzed pump performance by the rotation with the sinusoidal fluctuation for the impeller. From the viewpoint of torque and total head, each variable fluctuated in the same phase, but it was confirmed that there was a difference in fluctuation range. With engine rotation fluctuation given to the pump, we verify the pressure characteristics and efficiency on the outlet side change by CFD. In this paper, therefore, we report the results of CFD on pump output characteristics when periodic rotational fluctuations occur due to unsteady torque characteristics of the engine.

Original languageEnglish
Article number012067
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 2021 May 25

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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