November 27, 2023，In the field of agricultural machinery and off-road equipment,，Continue to bring sustainable drive solutions to our customers，The Mann Engine Company has launchedMAN H4576 new hydrogen internal combustion engine。This internal combustion engine is based onDResearch and development of 3876 diesel engine，Output up to 500 HP（368 kW），Displacement is 16.8 liters，It provides a wide range of possibilities for the decarbonization of agricultural machinery.。

“Hydrogen internal combustion engines accelerate decarbonization in off-road driving，It is a promising method.。Once the market is ready，We will provide tailor-made solutions for our customers in this area。”Head of Mann EnginesMikael LindnerEmphasize that。

Performance upgrade

D3876 Diesel Engines YesH4576 Fundamentals of Hydrogen Internal Combustion Engines，The two engines share about 80%The basic components of，Uch as a crankcase、Crankshaft、Connecting rod and cooling and oil circuit，Includes a pump、Oil pan and filter。The two internal combustion engines are almost identical in size.，And that applicability performance is improve.。Among，One important change is the increase in bore from 138 mm to 145 mm.，While the stroke remains unchanged.，Still 176 mm。AndD3876 Diesel Engine 15.3 liters of displacement compared to，Hydrogen internal combustion engine uses 16.8 liters of displacement is necessary，Because of its low power density，Failed to reach target power。

Based on this，Mann also works on hydrogen supply and combustion components.、Significant modifications have been made to the engine control system and the exhaust control system。HThe 4576's hydrogen supply consists of a new low-pressure line and rail system.，Provides the required hydrogen for the fuel injector。Precise pressure control to regulate hydrogen demand，O as to ensure efficient combustion，Provide the best fuel for the engine。Hydrogen injector for low pressure direct injection，Injection pressure up to 40 bar。Install it directly in the combustion chamber，Performance will be higher，Engine response will be better。 

The specially adapted ignition system takes these characteristics into account，The hydrogen mixture can be reliably、Controlled spark ignition。Among，A special engine control unit controls the hydrogen and air supply.，Regulate injection and ignition，And constantly adjust the engine parameters，To achieve safe and efficient combustion.。Compared to diesel engines，Hydrogen internal combustion engines need new pistons and gaskets.，Because the piston diameter has been increased to 145 mm。Higher displacement produces 500 horsepower（368 kW）The power of，With a displacement of 12.Four litersDThe performance of 2676 diesel engine is similar。The new turbocharger ensures the best power performance.，It also helps to reduce fuel consumption。

Pioneer technology

As a potential byproduct of hydrogen combustion，The only relevant emissions that may be released in the exhaust are nitrogen oxides。In order to achieve the goal of zero emission of nitrogen oxides as far as possible,，Mann Engines employs advanced combustion processes and proven exhaust gas aftertreatment systems.，Euro 5 and zero emission vehicles after treatment（ZEV）Emission standards。AtHDuring the development of 4576，MAN Engines benefits from its extensive experience and know-how in the field of hydrogen internal combustion engines。Back in 1996，Mann exhibited a hydrogen-powered bus at the Hannover Messe.。

This oneSL Type 202 city bus uses natural gas engine.，For hydrogen drive。“We have been working on environmentally friendly drives for a long time.。Today，We still benefit from pioneering technology in this area.。”Head of Engineering, Mann Engine CompanyWerner KüblerExpress。By virtue of its prior art，MAN H4576 Hydrogen internal combustion engines can be brought to market quickly。KässbohrerOff-Road Vehicles is a pioneer in the development of zero-emission drives for off-road vehicles in partnership with Mann Engines.。Coming soonPisten Bully 800 model，Has been placed for in terms of designMAN H4576 Hydrogen internal combustion engine has reserved space，And will provide the appropriate interface。

HThe 4576 hydrogen internal combustion engine also presents another possibility.——Hydrogen is not necessarily the only fuel.。Its dual-fuel engine is designed to work with conventional diesel orHVOAnd other alternative fuels.。V12MAN DThe 2862 engine is a success story.。Since mid-2022，The engine has been used as a dual-fuel hydrogen-powered engine to supply ships for wind farms.Hydrocat 48 to provide power。In addition，Mann Engines is currently developing a stationary hydrogen engineH3268，Used for putting into cogeneration power plant。

Source：MAN Commercial Vehicles China