研制了四气门柴油机单独进气道、单气道中置缸盖及气门口三维流速测量装置。在稳流气道试验台上 ,利用热线风速仪测量了不同气道布置方案下的进气门出口三维流场 ,揭示了进气道偏置对四气门柴油机进气门口三维流场影响的变化规律。气道的偏置使气门口切向速度大小发生了变化 ,速度分布变化很大 ,这种影响随升程的增加而增大。 Developed a four-valve diesel engine intake alone, the middle of the single-cylinder head and valve port flow measurement device. On the steady flow airway test rig, the three-dimensional flow field of the intake valve outlet under different airway arrangements was measured by the hot-wire anemometer, and the variation of the influence of inlet bias on the three-dimensional flow field at the intake valve port of the four-valve diesel engine was revealed . The bias of the airway changes the size of the tangential velocity of the valve, the velocity distribution changes greatly, and this effect increases with the increase of the lift.