Technical Paper
Influence of Catalyst and Exhaust System on Particulate Deposition and Release from an IDI Diesel Passenger Car under Real World Driving
2002-03-04
2002-01-1006
The influence of a diesel oxidation catalyst and a practical exhaust system with two silencers on the storage and release of particulates during cold start real world driving was investigated using a Ford 1.8 litre IDI Mondeo diesel passenger car. Particulates were sampled simultaneously at three points in the exhaust using an on-board gravimetric filter paper method. The test was carried out on two different on-road driving cycles: a simulated ECE 15 cycle to represent free moving low power city driving conditions, and a traffic jam and high speed suburban driving cycle. The results showed that the particulate matter was deposited in the oxidation catalyst during cold start and deposited in the exhaust system downstream of the catalyst throughout the test period. The particulate deposition and release downstream of the catalyst were influenced by the previous operational history of the vehicle.
