LUBRICATION TRANSFER MECHANISMS IN THE PISTON RING/LINER INTERFACE

由于担心润滑油对低速预点火（LSPI）、颗粒排放和油耗的影响，人们越来越关注润滑油通过发动机环包进入燃烧室的运输。此外，该区域的摩擦在总机械损失中所占比例最大。该项目将尝试通过以下方式定量了解润滑油粘度和环包区域内的吹胀相互作用：-开发能够同时测量润滑油膜厚度或流量的环间压力的能力，以量化润滑油传递机制-开发光学技术，以量化润滑油和气体流动的环动力学相互作用。并为CFD模型提供验证数据-了解燃烧气体与润滑油膜的相互作用以及进入燃烧室的输送机制-了解导致活塞环衬套接触区域内空化倾向的关键润滑油配方参数

There is increasing focus on lubricant transport through the engine ring pack into the combustion chamber due to concerns over its impact on low speed pre-ignition (LSPI), particle emissions, as well as oil consumption. In addition, the friction in this region accounts for the largest proportion of total mechanical loss. The project will try to offer a quantitative understanding of lubricant viscosity and blow-by interactions within the ring pack region through: - Development of the ability to measure inter-ring pressures simultaneous with lubricant film thickness or flows to quantify lubricant transfer mechanism - Development of optical techniques to quantify the interaction of ring dynamics with lubricant and gas flows, and offer validation data for CFD model - Development of understanding combustion gas interaction with lubricant films and transport mechanisms into the combustion chamber - Develop understanding of key lubricant formulation parameters leading to propensity for cavitation within piston ring liner contact zones