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2010 3rd IEEE International Conference on Computer Science and Information Technology—ICCSIT 2010

作者： Lingling Zhang 1 2 1 Artillery engineering Department Ordnance engineering College Shijiazhuang 050003 P.R.China Yunkui Xiao 2 Yiguan Zhao 2 Shiding Luo 2 2 Automobile engineering Department Academy of Military Transportation Tianjin 300161 P.R.China

To diagnose faults in engine accurately, technology on unsteady vibration signal acquisition（UVSA） from engine is studied. Measure principal, software and hardware composition of UVSA system at fixed rotary-speed is discussed and method of frequency bond energy accumulation（FBEA） is introduced. Based on short term Fourier transform （STFT）, the repeatability and stability of acquired unsteady signal is analyzed on two models of vehicle （EQ2102 and SX2190） by using FBEA. Experimental results show that UVSA instrument can accurately measure the vibration signal containing specific fault characters during the acceleration or deceleration process, and it has better repeatability and stability.

关键词： fault diagnosis unsteady vibration signal short term Fourier transform frequency bond energy accumulation automotive engine

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Identification of Axial Vibration Excitation Source in Vehicle engine Crankshafts Using an Auto-regressive and Moving Average Model

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Chinese Journal of Mechanical engineering 2011年第6期24卷 1022-1027页

作者： LIANG Xingyu WANG Yuesen SHU Gequn WEI Haiqiao DONG Lihui MEI Yifan State Key Laboratory of engines Tianjin University Tianjin 300072 China Oil Material Research Institute PLA Genera Logistics Department Beijing 102300 China

Violent axial vibration of a vehicle engine crankshaft might lead to multiple defects to the engine.Much research on mechanism and control measures has been done on engines,such as using the dynamic stiffness matrix method,rayleigh differential method,and system matrix method.But the source of axial vibration has not been identified clearly because there are many excitation factors for the axial vibration of a crankshaft,such as coupled torsional-axial vibration and coupled bending-axial vibration,etc.In order to improve the calculation reliability and identify the excitation source of axial vibration of in vehicle engine crankshafts,this paper presents a method to identify the axial vibration excitation source of crankshafts for high speed diesel engines based on an auto-regressive and moving average（ARMA） model.Through determining initial moving average variables and measuring axial /bending/torsional vibrations of a crankshaft at the free-end of a 4-cylinder diesel engine,autoregressive spectrum analysis is applied to the measured vibration signal.The results show that the axial vibration of the crankshaft is mainly excited by coupled bending vibration at high speed.But at low speed,the axial vibration in some frequencies is excited primarily by torsional excitation.Through investigation of axial vibration source of engine crankshafts,calculation accuracy of vibration can be improved significantly.

关键词： automotive engine crankshaft axial vibration excitation source ARMA

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Comparison of generalized engine control and MPC based on maximum principle

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Control Theory and Technology 2017年第2期15卷 150-157页

作者： Akira OHATA TECHNOVA Inc. The Imperial Hotel Tower 1-1 Uchisaiwai-cho 1 Chiyoda-ku Tokyo 100-0011 Japan

automotive engine control has been continuously improved due to the strong demands from the society and the market since introducing electronic controls but not always following control theories. Therefore, it is not easy for researchers from academia and even engineers from the automotive industry to grasp the whole aspect of engine control. To encounter the issue, important features of engine control are extracted and generalized from the standpoint of control engineering. Comparisons of the control and model predictive control （MPC） showed an outstanding performance of the control generalized from engine controls and how to apply MPC in the framework.

关键词： automotive engine history of engine control control design input constraints time delay model predictive control

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Calibration of catalyst temperature in automotive engines over coldstart operation in the presence of different random noises and uncertainty： Implementation of generalized Gaussian process regression machine

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Frontiers of Mechanical engineering 2015年第4期10卷 405-412页

作者： Nasser L. AZAD Ahmad MOZAFFARI Systems Design engineering Department University of WaterlooWaterloo N2L 3G1 Canada

The main scope of the current study is to develop a systematic stochastic model to capture the undesired uncertainty and random noises on the key parameters affecting the catalyst temperature over the coldstart operation of automotive engine systems. In the recent years, a number of articles have been published which aim at the modeling and analysis of automotive engines＇ behavior during coldstart operations by using regression modeling methods. Regarding highly nonlinear and uncertain nature of the coldstart operation, calibration of the engine system＇s variables, for instance the catalyst temperature, is deemed to be an intricate task, and it is unlikely to develop an exact physics-based nonlinear model. This encourages automotive engineers to take advantage of knowledge-based modeling tools and regression approaches. However, there exist rare reports which propose an efficient tool for coping with the uncertainty associated with the collected database. Here, the authors introduce a random noise to experimentally derived data and simulate an uncertain database as a representative of the engine system＇s behavior over coldstart operations. Then, by using a Gaussian process regression machine （GPRM）, a reliable model is used for the sake of analysis of the engine＇s behavior. The simulation results attest the efficacy of GPRM for the considered case study. The research outcomes confirm that it is possible to develop a practical calibration tool which can be reliably used for modeling the catalyst temperature.

关键词： automotive engine calibration coldstart

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Model and Control Issues of Gasoline engines

Model and Control Issues of Gasoline Engines

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第三十届中国控制会议

作者： SHEN Tielong,ZHANG Jiangyan Department of engineering and Applied Sciences,Sophia University,Tokyo 102-8554,Japan

＜正＞This mini-lecture focuses on the fundamentals of engine dynamics.Mainly,the basic technological knowledge for mathematically describing the dynamics of an internal combustion engines will be explained.Furthermor... 详细信息

关键词： automotive engine Dynamics Modeling engine control

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