EGR control system and method for instantaneous conditions of internal combustion engine
A technology for transient working conditions and control systems, applied in engine control, mechanical equipment, machines/engines, etc., can solve problems such as deterioration of NOx emissions, failure to achieve comprehensive optimization of smoke and NOx, and achieve reduction of harmful emissions, Effect of improving trade-off relationship and reducing NOx emissions
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Embodiment 1
[0042] The detailed working process under the transient condition with loading time of 2s is as follows:
[0043] (1) First, according to the actual needs of the smoke control target and the test calibration value, set the upper limit value of the smoke level, the upper limit value of the smoke level control area and the lower limit value of the smoke level control area in the electronic control unit (ECU) 6 . In this embodiment, the upper limit value of smoke is 10% (extinction smoke value), the upper limit of smoke control area is 8%, and the lower limit of smoke control area is 4%;
[0044] (2) Electronic control unit (ECU) 6. Collect the speed, torque and EGR valve opening signal of the diesel engine. When the torque transient rate of the engine is detected to be 278N.m·s -1 , it is determined that the engine is in a transient condition, and the following commands are quickly executed:
[0045] (3) The electronic control unit (ECU) 6 converts the EGR valve opening into th...
Embodiment 2
[0051] The detailed working process under the transient condition with loading time of 10s is as follows:
[0052] (1) First, according to the actual needs of the smoke control target and the test calibration value, set the upper limit value of the smoke level, the upper limit value of the smoke level control area and the lower limit value of the smoke level control area in the electronic control unit (ECU) 6 . In this embodiment, the upper limit value of smoke is 10% (extinction smoke value), the upper limit of smoke control area is 8%, and the lower limit of smoke control area is 4%;
[0053] (2) Electronic control unit (ECU) 6. Collect the speed, torque and EGR valve opening signal of the diesel engine. When the torque transient rate of the engine is detected to be 55.6N.m·s -1 , it is determined that the engine is in a transient condition, and the following commands are quickly executed:
[0054] (3) The electronic control unit (ECU) 6 converts the EGR valve opening into ...
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