In the last issue of《Dimensional classroom》Li，Xiaowei took you to learn the difference between side plate leveling and cross slope leveling of Wittgen milling machine.。Current period《Dimensional classroom》Xiaowei will take you to understand the new generation of Hummer to meet the fourth national emission standards. HC Relevant knowledge of tail gas treatment system of series full hydraulic single drum roller，The teachers of the training center will use the flagship model in this series. HC 268i D The knowledge of engine exhaust treatment system is introduced by taking road roller as an example.。

A new generation HC Series of fully hydraulic single-drum rollers are equipped with a powerful 154 kW The engine and Hammtronic Electronic Control System，It is powerful and efficient、Excellent performance of intelligent control，Can be widely applied to soil stabilization、Compaction construction of different materials such as earthwork and large-thickness water-stable layer。

HC The series adopts an integrated exhaust after-treatment system.：Diesel oxidation catalyst DOC +Diesel particulate filter DPF，Emission meets the latest national standard IV for non-road mobile machinery。In the new generation of HC Operation icons and function switches related to the after-treatment system are set on the series single-drum operation system.。

Humvee HC The series regeneration switch is normally in the neutral position，Placed on the upper side to open the function of prohibiting regeneration，At the same time, the indicator lights up.，It is the same as all the fourth national equipment of Wirtgen Group.，When the equipment enters the flammable and explosive area，The inhibit regeneration switch needs to be turned on， Prohibition DPF Carry out active regeneration，Avoid danger from high exhaust temperatures due to active regeneration。When the equipment leaves the area，The regeneration switch needs to be set to the neutral position in time.。Please click on the video to view more notes and operation methods.。

《Dimensional classroom》It is a video column produced by Wittgen China Technology and Training Center to introduce equipment operation and precautions.，Launch on a regular basis，I hope you will continue to pay attention.。In addition，If you have any questions you want to know, you can also send us a bullet screen or leave a message.。

《Dimensional classroom》It is a video column produced by Wittgen China Technology and Training Center to introduce equipment operation and precautions.，Launch on a regular basis，I hope you will continue to pay attention.。In addition，If you have any questions you want to know, you can also send us a bullet screen or leave a message.。