背はい圧あつ

noun

back pressure

Engineering term for pressure exerted in the opposite direction of flow, such as in pipes, engines, or exhaust systems.

• 排はい気き系けいの背はい圧あつが高たかすぎると、エンジンの出しゅつ力りょくが低てい下かする。

  If the back pressure in the exhaust system is too high, engine output decreases.