German engine manufacturer MAN Energy Solutions is working on a fresh new offering for the maritime industry. Even though the engine is only being released in 2026, it’s already generating hype in the shipping world due to its fuel versatility. The dual-fuel methanol MAN 175DF-M will be compatible with diesel and electric propulsion, making it an attractive option in the context of the global drive toward renewable energy.
MAN ES is making waves with a new methanol marine engine
MAN Energy Solutions (MAN ES) is a heavy-hitter in the maritime sector and has been around for over two centuries, starting out as an ironworks company in the 18th century. The company is headquartered in Augsburg, Germany, and has manufacturing sites in several countries, including Denmark and France in Europe, and India and China in Asia.
Specializing in two-stroke and four-stroke engines, MAN ES is moving with the times to develop sustainable solutions and offer powerful alternatives to traditional fossil fuel propulsion systems.
MAN Energy Solutions selected its existing high-speed MAN 175D engine as the basis for the methanol dual-fuel version, a strong choice considering the unit’s popularity among small and large-scale vessels due to its reliability and high-speed performance.
There are other German companies making strides in green engine development. BMW is working with Toyota to develop a hydrogen fuel cell engine and although the vehicle is only coming out in three years’ time in 2028, it’s got the motoring world hopping.
What does MAN ES’s dual-fuel 175DF-M have to offer?
MAN ES has optimized the 175DF-M to accommodate diesel-electric and diesel-mechanical propulsion, ensuring the largest methanol share and optimal efficiency across various load profiles and applications. The engine will be available as a newbuild unit or as a retrofit to existing 175D systems and has already been awarded its fuel-ready certificate by DNV (Det Norske Veritas), a global classification society and risk management company.
MAN Energy Solutions is drawing on its vast experience to develop an optimized solution for its four-stroke engines, which has been demonstrated through successful single-cylinder testing. The results gathered in this test phase will be applied to the development of the dual-fuel port fuel injection (PFI) technology for the methanol version of the 175D model.
MAN ES believes that PFI is the most advanced technology available
Florian Keiler, Head of High Speed for MAN Energy Solutions, expressed his confidence in the decision to base the methanol engine on the 175D:
“The MAN 175D has proven to be very competitive in terms of sustainability and efficiency with the lowest fuel consumption, lowest lube-oil consumption and longest overhaul times in its class, minimising its environmental footprint. In terms of future fuels, the next logical step, apart from being able to run on 100% bio-fuels, is to ensure methanol combustion.
“Based on numerous exchanges with customers, we came to the conclusion that the dual-fuel principle, reliability, efficiency, a high methanol share, competitive life-cycle costs and maximum achievable output were key requirements for the 175DF-M’s development. Therefore, after conscientious investigation and consideration, we settled upon the PFI combustion technology as the most favorable.”
MAN ES is convinced that PFI is the most advanced technology currently available. PFI aims to derive the highest methanol share over a wide power range while reaching the highest cylinder output in the high-speed engine class.
MAN ES is working on methanol fuel solutions alongside its engine
MAN is fully prepared to meet the demands of a decarbonized future and is working on methanol solutions hand-in-hand with its engine development. When using biofuels, the 175DF-M’s carbon footprint will be reduced to zero, which is what MAN is aiming for.
Petra Rektorik, one of the engineers working on the research and development of four-stroke methanol-fuelled engines at MAN Energy Solutions in Augsburg, highlighted the potential:
“The use of green methanol has great potential to significantly reduce the exhaust gas emissions for future marine applications.”
MAN plans to develop methanol-based systems for two and four-stroke engines that will be relevant for MAN’s complete marine portfolio.
It’s clear that MAN Energy Solutions is geared up for the green revolution in the long term, and the shipping industry’s efforts to move to renewable fuel will soon be galvanized with a versatile new engine option.
In more news about renewably-fueled engines, Japanese powerhouse Toyota is aiming for the top spot in the 2.0-liter field with a new offering. The potential for production engines is looking exciting and it’s highly possible that Toyota has a real winner on the way.