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In modern engine controlling, in order to adjust air-fuel ratio, electronic throttle valve systems are widely used in combustion engines. However, some difficulties arise in electronic throttle valve control due to multiple nonlinearities. Against this background, this study discusses the design of a throttle valve controller which is aimed to optimize control of throttle valves. Discussion is first made of how to model the electronic throttle valve. Then the design of the sliding mode controller is examined. Finally, a comparison is made of the simulation and experimental results.