ABSTRACT
The lube oil particulate fraction is the result of a gas chromatografic analysis which is described in detail in. This method is based on the comparison of the 50 %-boiling point of organic soluble particulates and the 50 %-boiling point of various fuel/lube oil-calibrating blends. The test procedure prescribed for exhaust emission tests is primarly essential for engine development. In Europe it is the 13-mode-steady test acc. to ECE R49 and in the US it is the transient test. The latter requires significant investments for electronic engine and dynamometer control and for exhaust measurement equipment. When testing the engine according to ECE R49 and the US-Transient test – depending on the engines type-different results on emissions may occur. The corresponding piston displacement as well as the rate of lube oil particulates in transient test is entered for each curve. The particulate rate during motoring corresponds to the lube oil consumption during this operation mode.
