Ọrụ nke obere ihe nchebe nke dị n'ihu ogwe ụgbọ ala: 1, iji gbochie obere ihe ịkwasa n'ime ụlọ engine mgbe ị na-anya ụgbọ ala, na-eme ka engine ahụ mebie, ma ọ bụ imetụ mmanụ mmanụ aka mgbe ị na-adọta ala, na-emetụta ya. arụ ọrụ nkịtị nke injin ahụ, mgbe ị na-edebe ụlọ engine dị ọcha;2, mgbe ị na-agbagharị, ọ nwere ike igbochi mmiri ịfesa n'ime ụlọ engine, ma gbochie akụkụ eletriki mmiri na mmiri na-ebute nsogbu.