空燃比 くうねんひ Also written くうねんぴ Meanings Noun air-fuel ratio; AFR Kanji 空 sky. Read as クウ. 燃 burn. Read as ネン. 比 compare. Read as ヒ. Words containing 空燃比 理論空燃比 (りろんくうねんひ) theoretical air fuel ratio Jinuma: Japanese Dictionary · Word lists