By optimizing the detecting circuit of spark plug ion-current, the high frequency and high voltage interference generated by the high ignition was successfully controlled and the stable ion-current signals within the ...
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By optimizing the detecting circuit of spark plug ion-current, the high frequency and high voltage interference generated by the high ignition was successfully controlled and the stable ion-current signals within the range of 0.3~3.2 V were obtained. In the testing process, three kinds of spark plugs were used and their ion-current signals at different engine operating condition (different engine speeds and loads) were gathered. By comparing these three different signals, it is obvious that the ion-current amplitude is influenced by spark plug's parameters, and also generally is intense with the increase of engine speed and load. And finally, the influences of spark plug parameters on ion-current signal amplitude were analyzed.
Based on transfer path analysis(TPA) theory, the driver floor's vertical vibration acceleration which was caused by engine excitation was taking under the condition of idle and 50 km/h in the city. The method and ...
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Based on transfer path analysis(TPA) theory, the driver floor's vertical vibration acceleration which was caused by engine excitation was taking under the condition of idle and 50 km/h in the city. The method and procedures of TPA were amplified. The dominant transfer path which has influence on ride comfort was identified, while the mount transmissibility was analyzed. The results show that the right mount excitation influences the driver floor's Z acceleration most and its transmissibility is also not well. The isolation performance of right mount needs to be improved for ameliorating ride comfort under these two conditions. The amplitude of every transfer path's partial contribution and finds the phase relation among each contribution's amplitude can be identified. It provides bases for the design of engine mount.
Based on the mean value engine model, and considered the nonlinear factors as the experimental data chart (map) which commonly used in automobile engineering, the map/physical model was established. Aiming at manageme...
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Based on the mean value engine model, and considered the nonlinear factors as the experimental data chart (map) which commonly used in automobile engineering, the map/physical model was established. Aiming at management of the engine torque output, the dual closed loop airpath control system was designed, including the intake manifold air flow tracking controller and throttle opening tracking controller. Finally, the effectiveness of the double-loop control system was verified in the environment of gasoline engine nominal value simulation model and high-fidelity four-cylinder PFI (enDYNA) gasoline engine model.
In this paper, a data-driven predictive controller is designed for the start-up process of vehicles with automated manual transmissions (AMTs). It is obtained directly from the input-output data of a driveline simulat...
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In this paper, a data-driven predictive controller is designed for the start-up process of vehicles with automated manual transmissions (AMTs). It is obtained directly from the input-output data of a driveline simulation model constructed by the commercial software AMESim. In order to obtain offset-free control for the reference input, the predictor equation is gained with incremental inputs and outputs. Because of the physical characteristics, the input and output constraints are considered explicitly in the problem formulation. The contradictory requirements of less friction losses and less driveline shock are included in the objective function. The designed controller is tested under nominal conditions and changed conditions. The simulation results show that, during the start-up process, the AMT clutch with the proposed controller works very well, and the process meets the control objectives: fast clutch lockup time, small friction losses, and the preservation of driver comfort, i.e., smooth acceleration of the vehicle. At the same time, the closed-loop system has the ability to reject uncertainties, such as the vehicle mass and road grade.
A traction control system based on AUTOBox for a four-wheel drive automatic mechanical transmission vehicle was designed. Road test was performed to match the different driving force control modes. The influences of t...
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A traction control system based on AUTOBox for a four-wheel drive automatic mechanical transmission vehicle was designed. Road test was performed to match the different driving force control modes. The influences of the conjoint control and independent control of the three control modes, the throttle control, the braking control and the gear control was analyzed. Experimental results show that the reasonable control method can effectively improve the vehicle's start and accelerate ability on the ice road.
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