Research on Cam & Tappet Friction Test Method for Anti-Wear Performance Evaluation of Engine Oil

The objectives of the research project were to establish a test method to evaluate anti-wear performance of engine oil. Comparative research was done about the method and ACEA test method CEC L-38-94 to prove that the two methods have similar evaluation capacity for engine oil. A cam & tappet test rig was set up. The tests which refer to PV5106 were running at certain speed, temperature, pressure and time. Two reference oils of CEC L-38-94 with different wear protection behavior were tested to compare the results with TU3 test data. The same oil was tested two times for repeatability research. The cam and tappet wearing results showed a good repeatability. And the cam& tappet friction test method correlates with CEC L-38-94. This method has simple experimental condition, short running time and single operating condition. It’s unable to completely simulate the actual working condition of engine. But the study certifies cam & tappet friction test method can be used to do wear evaluation. This method provides an effective technology for engine oil evaluation. It also provides convenient and efficient test data for engine oil research. It helps to save research cost and resources which conform to the concept of low carbon.