Technical Paper
A Study of Lubricating Oil Impact on Diesel Particulate Filters by Means of Accelerated Engine Tests
2006-10-16
2006-01-3416
The present work investigates the impact of lubricating oil formulations on efficiency and durability of Diesel particulate filters (DPF) by means of tests on a passenger car diesel engine retrofitted with a continuously regenerating DPF. An accelerated test procedure, characterized by oil injection into the intake air manifold to simulate a higher oil consumption, was designed and used to enhance the oil effect on trap weight increase and exhaust gas backpressure. Different prototype oils, designed to evaluate the influence of key additives characterized by a different elemental content, were used. The accelerated tests revealed to be a good tool to discriminate, in a short time, oils having a different impact on DPF performances. The main role of oil consumption and oil ash content emerged from the tests.