CAJ | 학술논문

Ashless anti- wear (AW) additives containing phosphorus can be used as partial or complete replacement of zinc dithiodialkylphosphate (ZDDP). In oils with low sulfated ash content (＜ 1.0%), this approach will allow a significant reduction of ash content and/or provide the formulator with more flexibility to use additional metallic detergents. Over the past 70 years or so, ZDDP has proven to be a very effective engine oil additive by helping to reduct oxidation, wear, and corrosion in service. In this paper, we will compare ZDDP- based lubricants with lubricants base on ashless, P- containing additive systems; we will describe the ashless chemistry investigated and discuss its contribution to wear performance in modem, low- SAPS (sulfated ash, phosphorus & sulfur) engine oils in various bench, rig and engine tests; we will also report on some work done to evaluate AW additive compatibility with modern three- way exhaust gas catalysts (TWC).