An H2 combustion process such as this is very robust. It
is possible to avoid measures such as inlet air pre-heating,
and combustion anomalies are practically excluded. In
addition, the combustion process is compatible with
almost unlimited supercharging and can cover the entire
operating range relevant to passenger car applications. The
documented efficiency based on measurements on the
engine shown in Fig. 10, assuming friction losses of a
modern passenger car diesel engine and a turbocharger
optimized for the operating point, turns out to be at the
same level as the most efficient passenger car turbo-diesel
engines, approximately 42% [37].