Engine-Oil Analysis Sensor

9361414众所周知，发动机油的使用寿命在很大程度上取决于配方和发动机运行模式。因此，基于行驶里程或发动机工作小时的换油间隔不一定定义机油的使用质量。对于柴油发动机来说，一个特别的问题是油的分散可能会非常迅速地失效，这使得悬浮的烟尘颗粒即使在实际的悬浮烟尘颗粒仅以1%到2%(w/v)的浓度存在的情况下也能使油凝胶化。胶凝的结果是粘度增加，冷启动保护性能差，更多的煤烟磨损和润滑性损失。当所有其他石油性质，例如。抗氧化性，仍有90%完好无损。一些发动机的运行时间表--特别是高负荷至低负荷的偏差--可能会导致在运行不到100小时的时间内完全失去分散。拟议的第一阶段研究旨在利用红内辐射的散射作为检测从分散良好的颗粒到分散失效时形成的团聚的转变的一种手段。选择波长源以匹配颗粒和凝聚体的有效散射直径，从而可以将转变检测为与经典瑞利散射行为的偏差。***

9361414 Hilliard The useful life of engine oil is known to be highly dependent on formulation and the engine operating mode. Consequently, an oil- change interval based on miles traveled or engine operating hours does not necessarily define the in-service quality of the oil. One problem in particular for diesel engines is that oil dispersancy can fail very rapidly, this enables the suspended soot particles to "gel" the oil even when the actual suspended soot particles are only present at a 1% to 2% (w/v) concentration. The result of gelling is increased viscosity, poor cold-start protection, more soot abrasion wear and loss of lubricity. Dispersancy of an oil can be lost when all other oil properties, eg. oxidative resistance, are still 90% intact. Some engine operating schedules - notably high-load to low-load excursions - can lead to total dispersancy loss in less than 100 hours of operation. The proposed Phase 1 research is directed at using scattering of intra-red radiation as a means of detecting the transition from well-dispersed particles to the agglomerates that form as dispersancy fails. The wavelength source is chosen to match the effective scattering diameter of the particles and agglomerates in such a way that the transition can be detected as a deviation from classical Rayleigh scattering behavior. ***