Home > Research > Publications & Outputs > I.C. air-fuel-ratio control using state-depende...
View graph of relations

I.C. air-fuel-ratio control using state-dependent parameter models and sliding mode control

Research output: Working paper



Air-Fuel-Ratio control is important as this will lead to the best balance between power, fuel consumption and exhaust emissions. In this article we considered Air- Fuel- Ratio control with two non-linear control methods: the sliding mode controller SMC and the state-dependent proportional-integral plus ‘SDP-PIP controller along with a complete system identification approach to the engine model. Simulation results demonstrated numerous advantages of both design strategies. SMC and SDP-PIP confirmed good tracking capabilities to the set point and successfully achieved the design goals. However, while having superior robustness and disturbance rejection properties, the drawbacks of sliding mode control would be that to achieve perfect control the capacities of the physical actuators (pumps/injectors) might be exceeded. In the long run, this leads to reduced control performance and reduces the physical life of components. SDP-PIP design is easy to implement, and it demonstrates flexibility to design conditions through adjustment of the weighting matrices where a trade-off/compromise between control effort and state errors is possible.

Bibliographic note

Was accepted for presentation at Control System and Power Electronics (CSPE), Dubai, UAE, July 2013 (SPE2013 - 504F) but the conference was cancelled.