Reducing the nitrogen oxide emissions from the exhaust gas recirculation device at the cost of reducing engine combustion efficiency ,deutz BFM1013 Starter sacrificing power ,deutz BFM1013 Starter economy. Therefore, the recirculation quantity of waste gas must be controlled within a certain range, so that the influence of power ,deutz BFM1013 Starter economy can be controlled within acceptable limits. When the recirculation increases to a certain extent, the combustion rate is too slow, the combustion fluctuation increases, hydrocarbon emissions increase, ,deutz BFM1013 Starter the power ,deutz BFM1013 Starter fuel economy deteriorate seriously. Generally, the recycling amount should be below 20%.A large number of studies show that the oxygen content in exhaust gas is low, ,deutz BFM1013 Starter the relative content of oxygen in the combustion chamber is reduced after the combustion chamber is introduced. At the same time, the heat capacity of exhaust gas can absorb a lot of combustion heat during combustion, thus reducing the maximum combustion temperature of the engine. The production of nitrogen oxides can be greatly reduced by two aspects. Usually the rate is 30~ 50%.