Hesselman engine

[ hes-uh l-muh n ]
/ ˈhɛs əl mən /

noun

a low-compression oil engine requiring a spark for ignition.

Origin of Hesselman engine

after Swedish engineer Knut Jonas Elias Hesselman (1877–1957), its inventor
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019