Method and device for calculating nitric oxide emitted by diesel engine

The invention discloses a method and device for calculating nitric oxide emitted by a diesel engine, and the method comprises the steps: obtaining the rotating speed, combustion parameters and working environment parameters of the engine based on the operation condition of the engine; establishing a nitrogen oxide model according to the rotating speed, the combustion parameters and the working environment parameters of the engine; and calculating the nitric oxide discharged by the diesel engine by using the nitric oxide model. According to the method, the nitrogen oxide emission condition of the diesel engine can be accurately calculated, the problem of failure of a nitrogen oxide emission system caused by failure of a sensor is effectively avoided, meanwhile, the sensor is replaced with a calculation mode, and the cost is greatly reduced. 本发明公开了一种柴油机排放氮氧化物的计算方法及装置，其中该方法包括步骤：基于发动机的运行工况，获取发动机的转速、燃烧参数和工作环境参数；根据发动机的转速、燃烧参数和工作环境参数，建立氮氧化物模型；利用所述氮氧化物模型计算柴油机排放的氮氧化物。本申请能够准确计算出柴油机的氮氧化物排放情况，有效避免了传感器失效导致的氮氧化物排放系统失效问题，同时