Anti-surge control method for diesel engine equipped with high-pressure exhaust gas recirculation supercharger
A technology of exhaust gas recirculation and control method, which is applied in the direction of electrical control, engine control, machine/engine, etc. It can solve the problems of slowing down the change of intake air volume and intake pressure, increasing fuel consumption, and affecting acceleration performance, so as to avoid noise and channeling, reducing air intake resistance, and avoiding the effect of surge
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[0073] Please see attached image 3 , with image 3 It is a typical layout of the intake and exhaust system of diesel engines above the National V. Considering reducing NOx emission and increasing EGR rate, and pursuing higher engine torque output, usually a higher target pressure is set for the supercharger, which increases the risk of supercharger surge, especially at some sudden torque and speed. drop under transient conditions.
[0074] Use the signal of the intake pressure sensor to get the inlet pressure P 21 =1880hPa and air mass flow rate dmAir=170kg / h, the supercharger compressor outlet pressure P is calculated according to the pipeline pressure model 20 =1904hPa; similarly use the ambient pressure P 0 =1009hPa and air mass flow rate dmAir=170kg / h, the supercharger inlet pressure P is calculated according to the pipeline pressure model 1 =1001hPa, and finally the actual pressure ratio of the supercharger CR=P 20 / P 1 = 1.887. And each supercharger has its corr...
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