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Container transport

Discussion:

SCR or EGR

Number of messages: 5

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Misterlift
England, United Kingdom

I notice battle lines are being drawn on the issue of whether to use an SCR system or an EGR system to satisfy EU3b engine emissions.
Consequently, manufacturers are falling into line behind their preferred engine supplier. This debate will get more intense when 3G infiltrates smaller engines.

But which is best? Interested to hear your views.

Posted 8 Jul 2011 05:41 AM

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Daveilift
west yorks, United Kingdom

From what i under stand the SCR system is more in line with the systems that are going to come into force in 2014 . Cummings mainly has gone with EGR system as it was cheaper to develop and changes will have to be made for 2014 any company who use this might have to do some more changes in 2014. As for the smaller engines again these look to be going down the EGR system that is lower cost to develop i don't know when or if there is going to be changes in this area but my thoughts is they will be yes. Big truck manufactures like Volvo and Iveco seem to have gone with SCR while cumming JCB ect have gone with EGR especially on smaller engines . The problems are going to arise in truck fiscal size trucks are going to have to be bigger and wider to fit the systems in and cooling will be a problem .If we were to look at the new linde 10,000kg truck this has been done to fit the EGR system in. This truck is only 5 years old and redesign work has had to be done .Hyster on the other hand and kalmar seem to be the same but i have not seen new spec sheets to compare with old to check size.

Modified 8 Jul 2011 11:43 PM
by poster.

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Misterlift
England, United Kingdom

Dave. I think I would agree, on balance, the SCR shades it. Both systems are not ideal in that ad-blue needs to be added to an SCR system and the EGR needs the soot filters cleansed regularly. I believe the SCR has a cleaner burn process in that it eliminates the soot in the burn - the EGR allows soot to flow then captures it in the filters. This must place restrictions in the system to ultimately reduce power.

Posted 9 Jul 2011 04:47 AM

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Daveilift
west yorks, United Kingdom

Yes i think you are right , i know when i looked into this i could use a smaller engine from one manufacturer who use the SCR system as against the EGR system . The problem i can see is where do the designers put the add blue tank. From what i have be told from a number of people in the truck trade it will be 2014 when the new even more tighter reg's come in then there would be a problem as EGR will be not as popular. I think its down to cost by the engine manufacture . At the moment from what i can see its the big truck manufacturers who sell large numbers of road truck who have had to develop add blue to meet the standers . Like you pointed out what will be interesting is what is going to happen next year when these have to be fitted into truck over 5,000kg . How will companies manage with out making there range bigger . And if the do will these trucks fit in customers work places.

Posted 9 Jul 2011 04:18 PM

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Daveilift
west yorks, United Kingdom

What could be really interesting i have heard a number of manufactures are struggling with their new trucks in the lower range due to the changes in 2012 . They don't seem able to fit the new engines and cooling systems into the truck without making them much bigger . This is going to be more complicated if like trucks with engines over 130KW are having more reg's in 2014 0r 2015. Engine manufactures are going to struggle as well . Be very interesting to find out who has the right idea a short term answer might not be the long term solution and may be more thought is needed to be ready for these changes.

Posted 15 Jul 2011 07:43 PM

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