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MAN
Page 48
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MAN introduced its Euro-5 and EEV strategy at the IAA Hannover Show last September. All MAN TGL and TGM trucks can meet the EEV standards by using EGR For the TGS and TGX models, SCR is used with EEV engines To reach the Euro-5 and EEV limits, MAN uses Lambda sensor-controlled EGR with exhaust recirculation rates of 30% and more. Other technologies include two-stage turbocharging, with indirect intercooling for the intermediate stage Two-stage turbocharging is used on all common-rail EGR engines. except the DOS series four-cylinder 4.6-litre 150hp (110kW) variant, to control costs Injection pressures of up to 1,800 bar are used with nine-hole injector nozzles. For the D08 series engines, the maximum charge air pressure has been increased to 4.0 bar.
MAN uses cooled EGR for these engines. As a result, a large charge-air pipe from the front of the truck isn't needed, which can free up space for a larger radiator. All EGR engines are fitted with a maintenance-free oxidising catalyst to control particulate emissions In order to meet the EEV limits, the EGR engines are fitted with the company's PM-KAT filter, which is used extensively in Euro-4 EGR engines.
Euro-5 TGS and TGX models equipped with the D20 six-cylinder 10.6-litre engine rated between 320hp and 400hp use EGR.
Those fitted with the 12 4-litre D26 at 440hp, 480hp, the new 540hp rating or the 680hp 16-litre V8 will use SCR emissions control