Abstract
The configuration and driving principle of Universal Exhaust Gas Oxygen sensor (UEGO) was introduced. Based on the technology of Electronic Pressure Regulator, the system structure of Compressed Natural Gas (CNG) Engine is built. Based on the chip MPC 561 and integrate chip CJ125, the UEGO controller which include hardware design of UEGO driver and software design of Air-fuel ratio closed loop are designed. Based model and PID controller, the control strategy of Air-fuel ratio closed loop is discussed. Bench tests show that the operating temperature of UEGO is stable and the response of UEGO driver circuit is rapid and accurate, and error of steady-state is small. This system will reduce the CNG engine’s fuel consumption and emission. Based of the UEGO control system, the intelligent control of engine’s intake rate of air and emission could be achieved.
F2012-B01-031
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Mao, X., Song, J., Wang, D., Wang, J., Tang, H., Zhuo, B. (2013). Controller Design and Emission Improvement for Lean-Burn CNG Engine Based on UEGO Controller. In: Proceedings of the FISITA 2012 World Automotive Congress. Lecture Notes in Electrical Engineering, vol 191. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-33777-2_13
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DOI: https://doi.org/10.1007/978-3-642-33777-2_13
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