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依照GB18352.5—2013中对标准台架循环(Standard Bench Cycle,SBC)的相关规定,设计研制一套适用于SBC试验循环的二次空气喷射系统,用于发动机台架老化试验。该系统气路部分由质量流量控制器和空燃比传感器组成双闭环系统,可根据需求调整每次喷射空气的质量流量,喷射时刻可严格对应标准,经过数十小时验证,二次喷射空气流量稳定,重复性高,可外接在现有发动机台架上进行催化器老化试验。
According to GB18352.5-2013 standard bench cycle (Standard Bench Cycle, SBC) of the relevant provisions of the design and development of a test cycle for the SBC secondary air injection system for the engine bench aging test. The gas circuit of the system is composed of a mass flow controller and an air-fuel ratio sensor. The system can adjust the mass flow of each injection air according to the demand. The injection timing can be strictly corresponding to the standard. After several dozen hours of verification, the air flow of the second injection is stabilized , High repeatability, can be externally connected to the existing engine for catalyst aging test bench.