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目前市场上出现了一种电子控制补气装置,据说源自美国,后传至欧洲,但并未在国外推广。该装置专门用于化油器发动机,实现λ闭环装置,配上三效催化转化器净化废气。这种装置的原理是,在化油器节气门两侧之间增添一个旁通补气通道,计算机根据排气管中氧传感器的信号,通过电磁阀控制这个旁通补气通道的补气量,从而实现λ闭环控制。从理论上讲,λ闭环控制回路的控制对象无非是空燃比,空燃比既可以从燃油方面来控制(电子控制汽油喷射),也可以从空气方面来控制(电子控制补气装置),所以无懈可击。但是,笔者愿提请有关各方注意下列问题:
Currently on the market there is an electronically controlled gas supplement device, which is said to have originated in the United States and then to Europe but has not been promoted abroad. The device is designed for carburetor engines, to achieve closed-loop lambda device, coupled with three-way catalytic converter to purify the exhaust. The principle of this device is to add a bypass gas channel between the two sides of the carburetor throttle. The computer controls the gas supply of the bypass gas channel by the solenoid valve according to the oxygen sensor signal in the exhaust pipe, In order to achieve λ closed-loop control. Theoretically, the control loop of the lambda closed-loop control loop is nothing more than an air-fuel ratio. The air-fuel ratio can be controlled from the fuel side (electronically controlled gasoline injection) and from the air side (electronic control of the inflator), so impeccable . However, I would like to draw the attention of all parties concerned to the following issues: