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Liebherr H9X4 is a very compact 9 liters 4-cylinder hydrogen engine. Still in development, this engine presents promising and encouraging results in terms of CO2 and nitrogen oxides (NOx) emissions. This 4-cylinder engine comes with a port-fuel injection (PFI) technology, which shows great performances and ensures best-in-class reliability.

High robustness against dust, dirt, and vibrations 

Close to “zero” Nox and CO2 emissions 

Reduced effort for air and hydrogen purity

Comparable interfaces (thermal and mechanical) with the vehicle to diesel engine 

<h2>Product advantages</h2>

<h2>Photo gallery</h2>

LiDIA diagnostic tool

 Engine Condition monitoring 

<h2>Options available for the engine</h2>

Discover our Training Academy for combustion engines

The Training Academy provides in-depth technical knowledge and practical expertise in the field of combustion engines to help professionals master the challenges of today and tomorrow.

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LiDIA - engine diagnostic solution

LiDIA is an intuitive and user-friendly engine diagnostic solution, which requires no configuration, facillitates access to the engine environment, and reduces the complexity of diagnostic procedures to the essentials. LiDIA offers a rapid overview of all information on the engine system: status, diagnostic trouble codes, active limitations and failure reactions.

reThink & reFuel

The reduction of global greenhouse gases is a significant challenge of our generation. Striving to reach net zero emissions in the future, Liebherr works on alternative and climate-friendly powertrain concepts. ​

<h2>Discover now</h2>

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Discover our emissions-friendly 4-cylinder hydrogen engine H964. This engine comes with direct injection technology (DI). 

Engine type	Hydrogen engines
Configuration	In-line engine
Number of cylinders	4
Bore	135 mm
Stroke	157 mm
Displacement	9.0 l

H9X4

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H9X4