New MAN engine portfolio for construction machinery lays the foundation for EU emission stage V
All units are designed for the currently valid US Tier 4 final/CARB and EU stage IV emission standards. With the use of modular exhaust gas aftertreatment, the entire engine range is optimally equipped for the future EU stage V without intervention in the basic engine. Also the high injection pressure generated by the Common Rail Injection produces extremely efficient fuel consumption and lowers emissions without compromising on performance.
“We are extremely satisfied with the results under test conditions in terms of fuel consumption and performance characteristics. Our initial global field tests in the off-road area confirm this impression,” commented Jürgen Haberland, Head of Off-Road MAN Engines. Our compliance with the current and future emission standard is due to the many years of experience we have of exhaust gas aftertreatment systems in the groups own commercial vehicles and of the large-scale production of industrial engines. This results in a current engine portfolio for construction machinery which meets the emissions standards and market requirements with a low level of complexity. “An SCR catalytic converter and the optimised combustion and internal engine exhaust gas recirculation of our MAN engines is sufficient for meeting US EPA Tier 4 final/CARB and EU stage IV. A bulky diesel particulate filter, the additional costs associated with this, and an oxidation catalyst are not necessary”, explained Haberland.
It is therefore not necessary for machine manufactures to make any changes in terms of heat balance, on the mechanical side or in terms of electronic triggering in order to upgrade to EU stage V effectively. The basic engine stays the same, and apart from the SCR catalytic converter and the diesel particulate filter, MAN simply makes changes to the control unit.
In order to comply with the EU stage V statutory particle count limit from 2019, MAN has also used space efficient modular exhaust gas aftertreatment (AGN). “We have decided to position the particle filter and SCR system separately but together to provide flexibility. This allows customers greater flexibility in complex assembly situations and when using the limited installation space available than would be the case with a bulky integrated individual solution”, says Haberland. Also, the diesel particulate filter can simply be removed for the machine to have an alternative product life cycle in countries where the emission legislation is less strict.