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MAN Engines Presents Groundbreaking Hydrogen Combustion Engine for Off-road Applications - In connection with sustainable drive solutions for agricultural machinery and off-road applications, MAN Engines presents the MAN H4576 - Agritechnica.com / ManTruckandBus.com
MAN Engines Presents Groundbreaking Hydrogen Combustion Engine for Off-road Applications

 

NewswireTODAY - /newswire/ - Munich, Bavaria, Germany, 2023/11/13 - In connection with sustainable drive solutions for agricultural machinery and off-road applications, MAN Engines presents the MAN H4576 - Agritechnica.com / ManTruckandBus.com.

   
 
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• Possible solution to decarbonize agricultural machinery;
• 500 hp (368 kW) from 16.8 litre displacement;
• Tried-and-tested MAN D3876 as the basis for further development;
• Rapid market readiness possible, cooperation with PistenBully.

This newly developed hydrogen combustion engine is based on the proven engine base of the D3876 diesel engine. With an impressive output of 500 hp (368 kW) and a displacement of 16.8 litres, the MAN H4576 opens up a wide range of possibilities for the decarbonization of machines in the field and off the road. "Hydrogen combustion engines are a promising approach to accelerate the decarbonization of off-road drives. As soon as the market is ready, MAN Engines will offer tailor-made solutions," emphasizes Mikael Lindner, Head of MAN Engines.

The basis for the MAN H4576 is the established MAN D3876 diesel engine. This shares about 80% of its basic components such as the crankcase, crankshaft, connecting rods as well as the cooling and oil circuits including pumps, oil pan and filter with the new hydrogen engine. The almost identical dimensions of the two combustion engines make it easier for machine manufacturers to integrate them into existing vehicle concepts.

An important change, however, is the increase in bore from 138 mm to 145 mm, while the stroke remains unchanged at 176 mm. This modification to a larger displacement of 16.8 liters compared to the 15.3 liters of the MAN D3876 diesel engine is necessary in view of the lower power density of hydrogen engines in order to achieve the target power. Significant modifications were made to the components for hydrogen supply and combustion, the engine control system and the exhaust gas control system:

The hydrogen supply of the MAN H4576 comprises the system of new low-pressure lines and a rail, which supply the injector with the required hydrogen (chemically: H2). Precise pressure control is used to dose the hydrogen demand to ensure efficient combustion and optimally supply the engine with the fuel. The hydrogen injector is used for low-pressure direct injection with an injection pressure of up to 40 bar. It is mounted directly in the combustion chamber for higher performance and better engine response. The specially tuned ignition system takes these properties into account and enables reliable and controlled spark ignition of the hydrogen mixture. Among other things, the specially designed engine control unit controls the supply of hydrogen and air, regulates injection and ignition, and continuously adjusts the engine parameters to enable safe and efficient combustion. Compared to the diesel engine, the hydrogen combustion engine requires new pistons and liners, as the piston diameter has been increased to 145 mm. With 500 hp (368 kW), the resulting higher displacement achieves a similar performance to that of the MAN D2676 diesel engine with a displacement of 12.4 litres. The new turbocharger ensures optimum dynamics and helps to reduce fuel consumption.

The only relevant emissions that occur as potential by-products of H2 combustion and could end up in the exhaust gas to a significant extent are nitrogen oxides (NOx). In order to reduce this to almost zero, MAN Engines relies on an advanced combustion process and an established exhaust gas aftertreatment system. The combination of hydrogen combustion engine and exhaust gas aftertreatment meets the EU Stage V and Zero Emission Vehicle (ZEV) emission standards.

In the development of the MAN H4576, MAN Engines benefits from its extensive experience in hydrogen engine technology and know-how in the field of gas engines for a wide range of applications. As early as 1996, MAN presented a hydrogen-powered bus at the Hannover Messe. This SL 202 city bus was powered by a natural gas engine that had been modified for hydrogen operation. "We started early on to deal with environmentally friendly drives. We are still benefiting from this pioneering role in technology today," says Werner Kübler, Head of Engineering at MAN Engines.

The MAN H4576 hydrogen combustion engine can be brought to market quickly thanks to its existing technology. The pioneer for emission-free drives for off-road vehicles in cooperation with MAN Engines is Kässbohrer Off-Road Vehicles. Their PistenBully 800 vehicle, which will be presented in 2023, already takes into account in its design that there will be space for a future hydrogen combustion engine the MAN H4576 and that corresponding interfaces will be available. However, the MAN H4576 engine also shows that hydrogen does not have to be used exclusively as the only fuel. Designed as a dual-fuel engine, it can be used in combination with conventional diesel or alternative fuels such as HVO. A successful example of this is the twelve-cylinder MAN D2862 V-engine, which has been powering the Hydrocat 48 wind farm supply vessel as a hydrogen dual-fuel engine since mid-2022. In addition, MAN Engines is currently developing a stationary hydrogen engine the MAN H3268 for combined heat and power in combined heat and power plants.

Product presentation at Agritechnica 2023

The MAN H4576 and other products and solutions with which MAN Engines (man.eu) is making its contribution to decarbonization will be on display at Agritechnica (agritechnica.com) from 12 to 18 November 2023. MAN Engines will be exhibiting in the "Systems & Components" area in Hall 15, Stand G05.

 
 
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MAN Engines Presents Groundbreaking Hydrogen Combustion Engine for Off-road Applications

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Hydrogen Combustion Engin | MAN Engines
Contact: Florian Schaffelhofer - ManTruckandBus.com 
+49 89 1580-2001 florian.schaffelhofer[.]man.eu
 
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