丰田汽车合司生产了一种4缸、排量为1．6L的稀薄燃烧发动机，在发动机的燃烧室中装有世界上第一个燃烧压力传感器．这种发动机在日本已有出售。燃烧压力传感器（如下图）可直接测量每个气缸内的燃烧压力，从而可以精确控制空燃比，致使稀薄燃烧发动机排放出较低的NOx，并具有较 Toyota Motor Corp. produces a 4-cylinder, 1.6L, lean-burn engine with the world’s first combustion pressure sensor in the engine’s combustion chamber. This engine has been sold in Japan. The combustion pressure sensor (pictured below) directly measures the combustion pressure in each cylinder so that the air-fuel ratio can be precisely controlled so that lean-burn engines emit lower NOx and have a lower