Exhaust treatment system restored by selective catalytic and exhaust treatment method restored by selective catalytic

Abstract

The invention discloses an exhaust treatment system restored by selective catalytic and an exhaust treatment method restored by selective catalytic. The system comprises a pressure difference transducer, an electronic control unit for post-processing and a motor control unit. The pressure difference transducer is used to real-time detect the pressure difference between the carrier inlet end and the carrier outlet end of an exhaust treatment device. The electronic control unit for post-processing is connected with the pressure difference transducer. The electronic control unit for post-processing is used to receive and send out pressure difference of motor under current operating conditions. The motor control unit is connected with the electronic control unit for post-processing. The motor control unit is used to determine whether the fault of the supernormal emissions is occurred or not according to pressure difference scope of the measured pressure difference of the motor under the current condition and the preset storied pressure difference corresponding to the current condition. When the fault of the supernormal emissions is occurred, the motor control unit controls the temperature of the exhaust of the motor to be increased to the preset temperature and last the first preset time. By the above scheme, the problems of great risk and long period length are solved because the fault treatment of the motor is controlled manually in the prior art.

Description

technical field [0001] The present invention relates to an exhaust gas treatment system utilizing selective catalytic reduction and an exhaust gas treatment method utilizing selective catalytic reduction. Background technique [0002] With the improvement of requirements on automobile emission levels, the application of selective catalytic reduction (Selective Catalytic Reduction, SCR) emission after-treatment systems is increasing. Specifically, the emission treatment device is the main place where catalytic reduction occurs, and the coated carrier is encapsulated inside. [0003] With the improvement of emission levels, the system is becoming more and more sensitive to the sulfur content of fuel oil. In actual use, the use of fuel oil with excessive sulfur content will cause the catalyst activity on the carrier to decline to a certain extent, and the sulfur compounds accumulated over a long period of time will eventually It will lead to sulfur poisoning of the carrier cat...

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Problems solved by technology

[0004] The object of the present invention is to provide an exhaust gas treatment system utilizing selective catalytic reduction and an exhaust gas treatment method utilizing selective catalytic reduction, so as to solve the problem of manual control of the engine in the case of excessive emission faults in the prior art. Defects with high risk and long period during troubleshooting

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