For the proper working of the internal combustion engine, engine oil plays a significant role. The performance of the engine is greatly affected by oil that has degenerated. In order to determine the optimal gap between oil changes, it is crucial to measure the deterioration in the engine oil. Multiple parameters like oxidation, nitration, viscosity and so on are brought into use. One of the methods used to quantify the deterioration in the engine oil is the Fourier Transform Infrared (FTIR) spectroscopy. The main parameters of the engine oil are distinguished by this method by utilizing Infrared (IR) absorption at different bandwidths. The two significant parameters in engine oil deterioration are oxidation and nitration. However, the limitation of the FTIR method is that it is more expensive and since it uses huge machinery, it requires a lot of area. Hence, the use of this method is not possible in the field area due to the need for space. It is this major limitation that is the motivation for proposing an inexpensive, yet handy system, using an IR sensor set up, in this paper. This system is used for measuring the transmittance of engine oil that has degenerated. For this paper, we collected random samples at various times from service stations that were specifically authorized. These samples were used in experiments based on the FTIR spectroscopy and UV spectrophotometer and the results were compared using the IR sensor setup. Investigation of the experimental results showed that monitoring oil transmittance using an IR sensor setup is possible, and a robust relationship between oxidation and nitration and the transmittance of the oil was observed. Moreover, a pattern of deterioration for a specific engine oil (SAE 5W30) which is utilized for passenger cars and light duty vehicles was also established.

中文翻译：

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通过低成本的红外传感器通过氧化和硝化参数评估汽油机油的劣化

为了使内燃机正常工作，机油起着重要作用。退化的机油极大地影响了发动机的性能。为了确定换油之间的最佳间隙，测量发动机机油的劣化至关重要。氧化，硝化，粘度等多个参数已投入使用。用于量化机油劣化的方法之一是傅立叶变换红外（FTIR）光谱。该方法通过利用不同带宽下的红外（IR）吸收来区分机油的主要参数。发动机机油劣化的两个重要参数是氧化和硝化。但是，FTIR方法的局限性在于它更昂贵，并且由于使用了庞大的设备，它需要很多面积。因此，由于需要空间，因此无法在野外区域使用该方法。正是这种主要局限性是本文提出使用IR传感器装置来提出一种廉价但方便的系统的动机。该系统用于测量已退化的机油的透射率。在本文中，我们在不同时间从专门授权的服务站收集了随机样本。这些样品用于基于FTIR光谱学和UV分光光度计的实验中，并使用IR传感器进行比较。对实验结果的研究表明，可以使用红外传感器设置监视油的透射率，并且观察到氧化和硝化与油的透射率之间存在稳固的关系。此外，