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As of the beginning of 2017, the number of motor vehicles in our country exceeded 300 million. Motor vehicle emissions are one of the most important sources of atmospheric haze. Therefore, vehicle emissions and energy consumption have always been important research directions for emission reduction and energy saving. In this paper, IOC (intake oxygen concentration) observer and feedforward controller of EGR and VGT are designed based on diesel engine air model. NOx virtual sensor model is designed to detect NOx emission as the feedback variable of IOC observer, and achieve the purpose of accurately measuring the amount of NOx, controlling the EGR valve and the VGT blade in real time, reducing the NOx emission of various diesel engines, improving the fuel economy of the engine and reducing the source of the haze, and there is an important reality in this research and the later promotion and social significance.

Research on Diesel Engine Energy Saving and Emission Reduction Based on Air System and NOx Virtual Sensor Model