回应不久前有网友问本田VCM的问题：晒晒换下的06本田奥德赛火花塞，看看不成熟的VCM系统对其V6发动机的危害

VCM Defination

Variable Cylinder Management (VCM) is Honda's term for its variable displacement technology, which saves fuel by using the i-VTEC system to disable one bank of cylinders during specific driving conditions—for example, highway driving.

Sounds so nice, but while these 3 cylinders in bank 1 are disabled by closing their valves, fuel ingection via pressurized oil valves mechinism, these 3 cylinders' pistons themselves are still  in physical  up and down motions with Bank 2, thus a vacuum is formed inside each of them,  as piston rings worn out along time, oil is sucked in and burned with gas. This will finally foul the spark plugs and kill the CAT, engine performs worse but consume more gas, there are vibration issue on engine mounts as well and other side-effects.

Below are my old spark plugs from both banks, (2006 Honda V6, engine 280k KM, plugs 140K Km)

cylinder#1 (the worst among all 6, oily and irridium electrod burned, oil is burned in #1 for sure )

cylinder#2 (lost focus, but better than 1 and 3)

cylinder#3 

cylinder#456 (no VCM side, looks much better to bank1, worn but dry)

 

 

所有跟帖： 

• 把不点火的那三个缸想象成油田的抽油泵 -MoonRiverMe- ♂ (203 bytes) () 12/16/2022 postreply 10:39:45

• 活塞上的缸环设计不可能做到完美，但新马达这种不完美基本可以忽略，缸体与Crankcase间接近完美密封，随着时间和磨损， -mountrobson- ♂ (227 bytes) () 12/16/2022 postreply 11:41:06

• 这个是本田六缸发动机迄今为止最大的bug。我的四驱pilot逃过了这一劫。 -成功的熊- ♂ (0 bytes) () 12/16/2022 postreply 12:19:06

• Pilot的V6通常是与odyssey 同一型号，但是有些年代和Trim的未有装配VCM，比如三代的奥德赛在EX以上才有 -mountrobson- ♂ (0 bytes) () 12/16/2022 postreply 13:09:37

• 我的2013 odyssey 6缸发动机有VCM，到现在一切正常。火花塞12万迈还挺好，换了后没发现有明显的不同。 -wibblypig0- ♂ (82 bytes) () 12/16/2022 postreply 16:57:35

• 23mpg的油耗对于这个体格V6-3.5的车很不错了，我的在发现VCM问题前，油耗和你相近，甚至更低，VCM会增加1MP -mountrobson- ♂ (0 bytes) () 12/17/2022 postreply 11:48:06

• 我的2017MDX在高速時可達到27mpg,這個系統的確有效 -khyang86- ♂ (0 bytes) () 12/18/2022 postreply 07:38:27

• 都28万公里的发动机了，这车已经不值钱了 -坚茂- ♂ (0 bytes) () 12/17/2022 postreply 18:36:49

• “piston rings worn out” 这个问题的发生是啥原因？ -johnifanx98- ♂ (0 bytes) () 12/24/2022 postreply 17:48:00