Subcontracting volume within K2-Mobility B01T01 project. Improvement of passenger car diesel engine with special respect to pollutant emissions. Experimental investigations and simulations.
International studies and in-house research have shown that a new and fundamentally different
combustion concept that uses a homogeneous premixed combustion has very promising advantages
over current diesel combustion for passenger cars. Following the theory of HCCI (Homogeneous
Charge Compression Ignition), the concept is based on low-combustion temperature compared to the
current diffusion high temperature diesel combustion. Studies and experimental investigations based
on initial prototypes have shown the potential to meet future emission regulation limits without NOx
exhaust aftertreatment, while still maintaining the low fuel consumption and high engine torque that
make the diesel engine competitive to the gasoline engine. The main challenges (and the
corresponding research imperatives) for a large-scale realization are controlling the start of the
combustion under variable conditions, CO and HC emissions (simulation of mixture preparation and
combustion), supercharging systems (transient simulation) and long-term stability. Subcontracting to
the Institute for IC engines and thermodynamics in the planned volume of 1,4 Mio over 5 years will be
necessary, in order to access the Institutes expertise (accumulated through such projects as Knet
VKM) and its specific test facilities (highly flexible engine test bed for single and cylinder research
engine) and measurement techniques (thermodynamic, exhaust emissions...).