Experimental Study of Energy-Saving Low Friction Oil on Small Turbocharged Engine

Abstract

In order to analyze the fuel economy improvement of energy-saving low friction oil on a small turbocharged engine under WLTC, eight oil candidates were blended by adding different kinds and doses of friction modifiers to the existing 5W30 oil formula from the perspective of commercialization, and the piston ring cylinder friction test was carried out to screen the formula, and then followed by the friction torque test and vehicle chassis dyno test on WLTC condition. The test results showed that the energy-saving low friction oil formula with fatty acid ester and MoDTC friction modifier can reduce the engine friction torque by 6.58% to 8.6%, and improve the fuel economy by 0.88% to 2.01%. According to the General Motors engine parts research and development system, GED test and GETC test were carried out to verify the influence of low friction oil formula on engine reliability. The test results showed that the energy-saving low friction formula with composite friction modifier can ensure engine reliability and has practical value.