一台S195型柴油机,新换缸套、活塞后,起动容易,空转发动机运转正常,但一带负荷(即使轻载),排气管立即冒黑烟,发动机明显功率不足。经检查,发现进气凸轮严重磨损。进气凸轮严重磨损后,引起挺杆升程减小,进气时间缩短,进入气缸中的空气量减少。这样,当发动机空载时,问题还不大,而负载时,则造成 A S195 diesel engine, the new cylinder liner, the piston, easy to start, idle engine running normally, but with the load (even light load), the exhaust pipe immediately black smoke, the engine obviously lack of power. After examination, found serious intake cam wear. Serious wear of the intake cam, causing the tappet lift to reduce the intake time is shortened to reduce the amount of air into the cylinder. In this way, when the engine is no load, the problem is not big, but when the load is caused