Model based design of electronic throttle control

14th International Conference on Science, Engineering and Technology

自然科学;工业技术

Cherian, Fenin^1 ; Ranjan, Ashish^1 ; Bhowmick, Pathikrit^1 ; Rammohan, A.^2

School of Mechanical Engineering, VIT University, Vellore

632014, India^1

TIFAC-CORE, VIT University, Vellore

632014, India^2

关键词: Electronic stability programs;    Electronic throttle control;    Engine management systems;    Exhausts emissions;    Initial operation;    Model- based designs;    Non-linearity parameter;    Robust performance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/263/6/062063/pdf
DOI  :  10.1088/1757-899X/263/6/062063

来源: IOP

【 摘 要 】

With the advent of torque based Engine Management Systems, the precise control and robust performance of the throttle body becomes a key factor in the overall performance of the vehicle. Electronic Throttle Control provides benefits such as improved air-fuel ratio for improving the vehicle performance and lower exhausts emissions to meet the stringent emission norms. Modern vehicles facilitate various features such as Cruise Control, Traction Control, Electronic Stability Program and Pre-crash systems. These systems require control over engine power without driver intervention, which is not possible with conventional mechanical throttle system. Thus these systems are integrated to function with the electronic throttle control. However, due to inherent non-linearities in the throttle body, the control becomes a difficult task. In order to eliminate the influence of this hysteresis at the initial operation of the butterfly valve, a control to compensate the shortage must be added to the duty required for starting throttle operation when the initial operation is detected. Therefore, a lot of work is being done in this field to incorporate the various nonlinearities to achieve robust control. In our present work, the ETB was tested to verify the working of the system. Calibration of the TPS sensors was carried out in order to acquire accurate throttle opening angle. The response of the calibrated system was then plotted against a step input signal. A linear model of the ETB was prepared using Simulink and its response was compared with the experimental data to find out the initial deviation of the model from the actual system. To reduce this deviation, non-linearities from existing literature were introduced to the system and a response analysis was performed to check the deviation from the actual system. Based on this investigation, an introduction of a new nonlinearity parameter can be used in future to reduce the deviation further making the control of the ETB more precise and accurate.