MAN Engines for Construction, Agricultural, and Special Machinery

New 9.0 litre off-road D1556 engine from MAN Engines for perfect integration in agricultural machinery

The new straight-six, 145-mm stroke, 115-mm bore MAN D1556 engine, which has applications in agricultural machinery. With a power unit that has been developed from the ground up, MAN Engines is making a foray into the 9.0 litre class and, with a power ranging from 205 to 324 kW, is narrowing the power class between the established MAN D0836 and D2676 series, with engine sizes of 6.9 l and 12.4 l, respectively. There are many ways in which the new MAN engine represents a forward-thinking approach. First, its high power density, despite a compact and lightweight design, and the optimal torque and performance profile alongside extremely low fuel consumption. Secondly, the D1556 particularly excels due to its high potential for integration in agricultural machinery as well as its countless individual solutions for machinery manufacturers. This is because, with the D1556, MAN Engines is offering OEM manufacturers not just power and torque, but also significant added value to leave the competition behind.

The new MAN D1556 stands for

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Modular exhaust gas aftertreatment

The modular exhaust-gas aftertreatment system is compact and meets EU Stage V and US Tier 4 standards, and can be downgraded for less stringent emission requirements.

The customer can of course choose between various performance classes and, depending on the target market, choose the exhaust gas aftertreatment system that is right for them. MAN’s D1556 meets the most recent emission requirements such as the Euro Stage V and US Tier 4 emissions standards. At the same time, the new engine from MAN also provides opportunities to set limits with greater ease and at a lower cost for countries with less stringent requirements, in line with EU Stage IIIA/IIIB. The basis for this is the modular exhaust-gas aftertreatment system from MAN Engines, which has a wide range of replaceable components and packaging options. These stem mainly from the two component groups DOC/DPF (diesel oxidising catalytic converter/diesel particulate filter) and SCR (Selective Catalytic Reduction) with mixers for EU Stage V and US Tier 4. For the emissions downgrade to Stage IIIA/IIIB, for countries with emission standards that deviate from these, only the component group with SCR is used. This flexible system enables manufacturers of off-road machinery to offer their products around the world without having to change the installation conditions for their basic engines. An SCR-only system without separate exhaust gas recirculation is generally used for the D15 engine, which saves space and reduces system complexity. The cooling of the exhaust gas from around 500°C down to around 70°C, something that the EGR module usually has to perform, is no longer an issue. As a result, less cooling output is necessary and a smaller cooling system can be installed. The lower cooling requirements mean that a less powerful fan can be installed, thereby increasing the system’s overall efficiency. The airless injection of the carbamide solution also cuts down on space and technical complexity and thus reduces the volume required to install a system that was already flexible in this regard.