康明斯柴油动机维修保养注意事项.docVIP

康明斯柴油发动机维修保养注意事项 Cummings diesel engine repair and maintenance matters needing attention 　　我国客车制造商近期采用康明斯系列柴油机型越来越多，如常州长江双层城市客车装配B2230CN G 发动机；EQ 5061 XXYK 厢式客货两用车装用4BT 319AA 发动机；EQ 6890L K 豪华客车选用6BTA 发动机；EQ 6590 ( 2000 款)、EQ 6690 ( 2000款) 客车也选用4BT 319AA 增压发动机。实践表明，康明斯发动机在客车上动力强劲，经济省油，使用可靠，排放污染低。为延长康明斯柴油机的使用寿命，以6BT 系列机型为例，介绍几点维修注意事项及故障诊断方法，供修理时参考。 Chinese bus manufacturers recently using Cummings series diesel engine is more and more, such as the Yangtze River in Changzhou city bus assembly B2230CN double G engine; EQ 5061XXYK van vans fitted with the 4BT319AA EQ6890L K luxury passenger car engine; engine using6BTA; EQ 6590(2000), EQ 6690(2000) bus also use4BT319AA supercharged engine. Practice shows that, Cummins engine in bus driving power, fuel economy, reliable use, low emission pollution. As an extension of Cummings the service life of diesel engines, the6BT series model as an example, introduces several repair points for attention and the methods of fault diagnosis for passenger cars are repaired, reference. 　　１、维修注意事项 1, repair the matters needing attention 　　（１）6BT118 机型镶装缸套 (1)6BT118type inserting cylinder 　　制造商未在该机上镶装缸套，但允许在气缸磨损量超过使用极限后镶装专用缸套。我公司对专用缸套和牟平102 系列缸套都进行了镶装试验。镶专用缸套时，先将缸套承孔镗至φ104. 94 mm ，并保证承孔与缸套的过盈量为0.05～ 0. 07 mm。注意在承孔下部留7～ 8 mm 高的止口，再将已在- 20°C 条件下冷却1 h 以上的缸套涂胶并压入承孔，最后切除缸套上端高出缸体上平面的部分，将缸套内孔镗至φ101. 97 mm (留0102～ 0. 03 mm 的珩磨量) ，使珩磨表面粗糙度为Ra0. 4 Lm，保证缸套与活塞之间的间隙符合规定。镶牟平102 系列缸套时，先将缸套承孔上部加工出φ112. 05mm、深10 mm 的台阶(俗称上止口) ，再将缸套承孔镗至约φ107.95 mm (留0.02～ 0. 03 mm 的珩磨量)，然后珩磨，使承孔表面粗糙度为Ra0.4Lm，并保证承孔与缸套的过盈量为0.02～ 0. 03mm。最后将缸套外圆表面涂少量机油，压入承孔。 The manufacturer is not in the machine insert liner, but allows the cylinder wear exceeds the limit after inserting special cylinder. I company for cylinder liner and the Muping 102 series cylinder have been embedded test. Insert special cylinder, the cylinder bearing hole boring to φ104.94 mm, and ensure the bearing bore and cylinder interference amount was 0.05~ 0.07 mm. Attention in the HYPERLINK / bearing hole of low