Diesel Exhaust Odour of Small, High Speed, Direct Injection Engines

A liquid chromatographic analysis system, a replica of the Arthur D. Little system, is described. This system may be used to make exhaust measurements in an engineering environment provided care is taken in the preparation of the analytical materials.

The system was used to investigate the odorant formation processes in a small, direct injection diesel engine. The major factors influencing odorant formation were found to be the amount of fuel dispersion during the ignition delay and the nozzle uncontrolled fuel volume.

These principles were embodied in a low exhaust odour engine and its performance is contrasted with an alternative combustion system.