康明斯柴油发动机维修保养注意事项

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1、康明斯柴油发动机维修保养注意事项12020 年 4 月 19 日文档仅供参考康明斯柴油发动机维修保养注意事项Cummings diesel engine repair and maintenance matters needingattention中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 ( 款)、EQ 6690 ( 款 ) 客车也选用4BT319AA 增压发动机。实践表明，康明斯发动机在客车上

2、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

3、luxury passenger car engine; engine using6BTA; EQ 6590( ), EQ 6690( ) bus also use4BT319AA supercharged engine. Practice shows that, Cummins engine in bus driving power, fuel economy, reliable use, low emission pollution. Asan extension of Cummings the service life of diesel engines, the6BT series m

4、odel as an example, introduces several repair points for22020 年 4 月 19 日文档仅供参考attention and the methods of fault diagnosis for passenger cars are repaired, reference.、维修注意事项1, repair the matters needing attention（） 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

5、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104. 94mm ，并保证承孔与缸套的过盈量为0.050. 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101. 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 112. 05mm、深 10 mm 的台阶 (俗称上止口 ) ，再将缸套承孔镗至约 107.

6、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。32020 年 4 月 19 日文档仅供参考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

7、102 series cylinder have been embedded test. Insert special cylinder, the cylinder bearing holeboring to 104.94 mm, and ensure the bearing bore and cylinderinterference amount was 0.05 0.07 mm. Attention in the bearinghole of lower part of7 8 mm high port, and then in - 20 C under theconditions of c

8、ooling over 1 h cylinder gluing and press into thebearing hole, finally resected cylinder upper high cylinder part, thecylinder sleeve inner hole boring to 101.97mm (with01020.03mm ), quantity of the honing honing surface roughness is Ra0.4Lm, ensure that the clearance between the cylinder liner and

9、 piston inaccordance with the provisions. With Muping102 series cylinder, thecylinder bearing hole of upper processing of 11205mm,10mm level( commonly known as the upper stop ), then the cylinder bearing hole boring to 107.95mm (with0.02 0.03 mm honing volume ), and then make the bearing hole honing

10、, surface roughness of Ra0.4Lm, and to ensure the bearing bore and cylinder interference amount was 0.020 03mm. The liner outer surface apply a small amount of oil, pressed into a bearing hole.经过这两种缸套镶装试验，总结如下：42020 年 4 月 19 日文档仅供参考The two cylinder is inlaid with the test, summarized as follows:、使用牟

11、平102 系列缸套装机能够大大缩短修理时间。因为该缸套的内孔面为成品面，不需镗、磨及在镗缸机上装夹缸体、定中心而费力费时；其次缸套在压入承孔前不需冷处理。但用专用缸套装机，每次修理时需镗旧缸套次、珩磨1 次、缸体装夹 2 次和定中心次，还要冷处理缸套。A, using the Muping102 series cylinder set machine can greatly shorten the repair time. Because the cylinder bore surface of finished surface, need not be boring, milling and

12、 in the cylinder boring machine with the clamping cylinder, centering and laborious and time-consuming; the second cylinder in press in the bearing hole of no need of cold processing. But with a special cylinder set machine repair, every time when boring old cylinder jacket2 times,1 times, honing cylinder clamping2 and center2, and cold treatment of cylinder liner.、使用牟平102 系列缸套装机，维修质量容易保证。因为缸体在珩磨机上经过多次装夹和定中心后，会因定位误差积累而超差，增加了维修质量难度，特别是用移动式镗缸机产生的误差更大。而使用牟平102 系列缸套，只要第1 次承孔镗磨质量符合技术要求，以后能够像五十铃载货车发动机一样直接压入、压出缸套，而且组装上活塞连杆后工作时不会产生偏缸。52020 年 4 月 19 日