A new method for rapid determining the total base number (TBN) of internal combustion engine oil by voltammetric techniques was described, the result determined by voltammetric technique was compared with that by standard method.

The hydrogenation base oil was used for preparing the internal combustion engine oils like SH,SJ/GF-2,CF-4.

The relationship between the high temperature detergency of internal combustion engine oil and the information provided by the FT-IR spectrum of the engine oil was investigated.

Determination of Oxidation Value and Nitration Value in Engine Oil by FT-IR;

And the above heavy fraction base oils were applied to the formulation of engine oils and a series of blending projects were obtained.

The performances of some friction modifiers at different temperatures in engine oils were investi- gated using the High-Frequency Reciprocating Rig(HFRR).

An analysis of the boundary conditions in the atomization process of combustion engine fuel jets;