Hydrogen Combustion
Hydrogen is a zero carbon fuel which has significant potential as an IC engine fuel for applications such as heavy duty, off-road and construction that our proving very difficult to electrify.
Key Attributes of H2 IC Engines
- Utilises existing proven technology and engine hardware
- Easy integration into existing vehicle platforms
- Fast refuelling for high duty cycle applications
- Maintains ICE powertrain characteristics
- Lower H2 purity requirement than fuel cells
- Potential for extremely low emissions
H2 IC Engine Requirements
- Mechanical
- Material changes for low lubricity & embrittlement
- Detailed PCU design for reduced blowby and oil consumption
- Positive crankcase purging
- Combustion System
- Measures to tackle abnormal combustion and maximise efficiency
- MAHLE Jet Ignition® is an enabler for combustion stability
- Optimised for lean operation
- Very low engine out NOx achievable at steady state
Our Tools, Facilities and Services
- Predictive analysis of concept design (FEA, CFD, 1-D simulation)
- Proven design / development procedures (FMEA, PLM)
- Detailed evaluation of emissions and fuel consumption
- State of the art in-house engine and vehicle test capabilities
- Dedicated safety measures for hydrogen handling
- Integration of prototype engines into demonstrator vehicles

Hydrogen as a combustion fuel