Development of an Exhaust Thermal Enhancer™ Using an Airless Nozzle Fuel System 2011-01-1132
This paper describes the development of an exhaust Thermal
Enhancer™ using an airless nozzle fuel system. The purpose of the
Thermal Enhancer™ is to increase diesel engine exhaust gas
temperatures to a level where catalytic heating can be used for
Diesel Particulate Filter regeneration. The system can also be used
to achieve adequate temperatures for NOx reduction, employing
techniques such as Selective Catalytic Reduction.
The Thermal Enhancer™ is used to increase exhaust gas
temperatures at conditions that would otherwise be too cold for
effective catalyst operation. These conditions include idle and
low-load operation. The airless-nozzle fuel system is necessary for
engines that do not have a compressed-air system.
Performance data, including hydrocarbon slip as a function of
Thermal Enhancer™ outlet temperature are presented at steady state
conditions. Pressure loss as a function of engine speed indicates
it is less than 1 kPa at the maximum exhaust flow rate. Thermal
Enhancer™ outlet temperature as a function of engine speed is
greater than 300°C across the engine map. Data are measured from an
engine test cell configuration.