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Air Flow Estimation Control Strategy Based on Speed-Density Method

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Air Flow Estimation Control Strategy Based on Speed-Density ...

2014中国汽车工程学会年会

作者： Lei Xue Shen Chen Zheng Jianbo Zhou Yao Chen Zhongtian zhang Chunjiao Chen Min Qin Long zhang fanwu Technolgy Center Dongfeng Motor Corporation

ISBN: (纸本)9783662450420

According to the analysis of Speed- Density method and the principle of volume estimation,the intake air flow calculation control strategy can be designed with Simulink *** Embedded- Coder toolbox can be used to automatically generate the code of above control strategy,and then integrate the code into the ***,the control algorithm is verified on bench test and real vehicle test,and the result shows this estimation algorithm can accurately estimate intake volume,which means we achieve the design requirements.

关键词： Speed-Density method intake air flow calculation control strategy based on Simulink bench test

The Gasoline Engine Starting Strategy Based on Air-Fuel Ratio Control

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The Gasoline Engine Starting Strategy Based on Air-Fuel Rati...

2014中国汽车工程学会年会

作者： Chen Zhongtian Wang Kai Shen Chen Xu Feng Qin Long Zheng Jianbo Lei Xue zhang fanwu Technology Center Dongfeng Motor Corporation

ISBN: (纸本)9783662450420

During the engine starting process,the speed always gets up and back to idle speed slowly,in order to solve these problems,at the same time to control the combustion during the starting process more accurately,a gasoline engine starting strategy based on air-fuel ratio control is developed,including intake airflow control,air-fuel ratio control and so *** selecting the appropriate air flow and air-fuel ratio,the fuel injection amount is calculated,and the test results show that the engine can start up quickly and reliably,and the starting speed will have a smooth transition to target idle speed.

关键词： gasoline engine start intake airflow A/F ratio

Research on Diagnostic Strategy of Planar-type Oxygen Sensor Deactivation on Gasoline Engine EMS

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Research on Diagnostic Strategy of Planar-type Oxygen Sensor...

2014中国汽车工程学会年会

作者： Qin Long Xu Feng Zheng Jianbo zhang fanwu Huang Yongyi Chen Zhongtian Lei Xue Yang Liuchun Technology Center Dongfeng Motor Corporation

ISBN: (纸本)9783662450420

On-board Diagnosis（OBD） system is the key part of national emission standard,and gasoline engine oxygen sensor deactivation diagnosis is one of the most important OBD *** this study,we,according to the principles of Planar-type oxygen sensor,develop the main fault types of oxygen sensor deactivation,which consist of electrical fault and rational *** analyze the diagnostic strategy of the both faults,generate the strategy model by Simulink,and offer the diagnosis flow *** last,we use the sensor deactivation simulators to simulate the ***-in-the-loop（HIL） bench and chassis dynamometer tests,the results show that the diagnostic strategy of oxygen sensors is rapid and precise,and it meets the requirements of national standard.

关键词： EMS OBD oxygen sensor emission

Microscopic characteristics and geological significance of pyrite in shales of the Wufeng-Longmaxi formations,southeastern Chongqing,China

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Energy Geoscience 2024年第3期5卷 203-211页

作者： Xiao Cai Wei Xia Yuxia Liu Shunzhou Liao Lei zhang Weixue Hu Li Liu Wei Li fanwu Zeng Research Institute of Exploration and Development East China Oil and Gas CompanyYangzhou225007China

Shales of the Wufeng-Longmaxi formations in the basin-margin transition zone of southeastern Chongqing,China are characterized by high organic matter content and a significant presence of pyrite *** examining numerous scanning electron microscope(SEM)images and considering the crystal and aggregate characteristics of minerals,we identified four types of pyrite in the study area:euhedral crystals,irregular aggregates,framboidal aggregates,and metasomatized *** these types,framboidal aggregates are the most *** formation mechanism of framboidal pyrite can be categorized into inorganic and organic *** inferred from the pyrite characteristics in the study area,the formation mechanism of the metasomatized organisms aligns with the biologically induced mineralization mode of organic origin,whereas the framboidal aggregates are more associated with the biologically controlled mineralization mode of organic *** underscores a close relationship between the pyrite formation and organic matter,which in turn indicates that an organic origin is more consistent with the pyrite characteristics observed in this study *** pyrite morphology can reflect reactive iron *** pyrite crystals tend to form under a low reactive iron concentration,whereas the formation of framboidal pyrite requires a high reactive iron ***,the type and grain size of pyrite aggregates can reflect variations in the redox conditions of the depositional *** produces positive effects on reservoir storage space,with intercrystalline organic pores,intercrystalline pores,and mold pores associated with pyrite contributing greatly to the storage spaces.

关键词： Wufeng-Longmaxi formations Shale Pyrite Microscopic characteristics Geological significance

基于谐波配比优化的Φ_(2)类逆变器设计研究

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华中科技大学学报（自然科学版） 2023年第9期51卷 146-151页

作者：张德生张凡武童乔凌张嵬华中科技大学光学与电子信息学院湖北武汉430074 东风汽车集团技术中心湖北武汉430056 上海卫星工程研究所上海200240

为了降低Φ_(2)类逆变器中功率开关器件的电压应力并简化其谐振参数设计过程,提出了一种基于谐波配比优化的参数设计方法.首先对Φ_(2)类逆变器开关节点电压(vds)频谱进行了分析,以降低开关器件电压应力为导向推导了优化的谐波配比和目... 详细信息

为了降低Φ_(2)类逆变器中功率开关器件的电压应力并简化其谐振参数设计过程,提出了一种基于谐波配比优化的参数设计方法.首先对Φ_(2)类逆变器开关节点电压(vds)频谱进行了分析,以降低开关器件电压应力为导向推导了优化的谐波配比和目标vds.然后基于目标vds实现了对Φ_(2)类逆变器微分方程的退耦合求解,得到了各支路的电流并进行了完整的量化分析.进一步结合开关节点电压和开关电流的频谱特征,推导了Φ_(2)类逆变器谐振槽的阻抗幅度与相位约束,以此为依据提出了直接确定电路谐振参数的方法.最后搭建了27.12 MHz的原理样机,和传统设计方法相比,开关电压应力降低了10.2%,效率提升了7.2%.

关键词：超高频谐振变换器谐波配比优比谐波幅度电压应力设计方法

The Research of Vehicle Network Control System Model

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The Research of Vehicle Network Control System Model

FISITA 2012 World Automotive Congress--Volume 6:Vehicle Electronics

作者： Kai Li Juan Wan Jie Bai Jianxian Chen Gan Chen fanwu zhang Jianguang Zhou Dongfeng Motor Corporation Technology Centre

With the development of vehicle electronics,the problem of strong coupling and poor generality of vehicle electronic control products become more significant due to the closed-loop control mode of the vehicle electronic control *** to the trend analysis of the future development of Vehicle Electrical and electronic by using s-curve and nine-screen method of the TRIZ,vehicle network control system,also referred as VNCS is not only an important way to solve the above mentioned problem,but also an important trend for Vehicle Electrical and Electronic *** the basic theory and model of VNCS have not fully developed yet,the methodology of research and design of VNCS still need to be further *** this paper,according to vehicle electrical and electronic features,the theory of industrial network control system and communication system model is introduced to build up the vehicle network control system model,furthermore,vehicle network control system model based on CAN and FlexRay are simulated and *** research results indicated that,real-time performance of vehicle network control system model based on FlexRay is better than which based on *** the same time,with the separation f vehicle control system sensors,actuators and controllers,the diversification of the system functions is increased,which is an effective solution for the problem of strong coupling and poor generality of vehicle electronic control *** research provided guidance of basic theory and design for *** also forecasted the future of vehicle network control system development prospect.

关键词： CAN FlexRay Vehicle network control system model Real-time simulation Functional analysis

Determination of Throttle Setpoint Control of Turbo-charged GDI Engine Based on Newton Raphson Iteration

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Determination of Throttle Setpoint Control of Turbo-charged ...

2019中国汽车工程学会年会

作者： Qin Long zhang fanwu Liu Lei zhang Chunjiao Zheng Jianbo Lei Xue Yang Liuchun Tian Fengmin Zhao Fangxun Dongfeng Motor Corporation Technical Center

For the purpose of responding the request engine torque and inhibiting the overshoots of intake air pressure（air density）,target intake air pressure algorithm in the nonlinear character of engine intake system is firstly promoted based on Newton Raphson iteration method,and real-time recursive equation of target intake air pressure is *** intake pressure of transient operation condition is *** according to Tustin Derivative method,optimizing throttle efficient area change rate is taken into *** last,throttle position control strategy is verified on the bench and *** result shows that the throttle position control strategy can meet engine request torque precisely.

关键词： turbo-charged GDI engine throttle position newton raphson iteration tustin derivative

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汽油机ECU大气压力预估算法的开发与应用

汽车工程 2013年第11期35卷 955-957页

作者：徐凤郑建波王恺张春娇张凡武田丰民东风汽车公司技术中心武汉430056

针对没有大气压力传感器或大气压力传感器有故障的汽油机,为保证汽油机吸入足够气量而得以正常运行,基于可压缩流体理论,提出了汽油机大气压力预估算法,并通过软件在环仿真,对控制算法进行了初步验证。然后,使用Embeded-Coder工具箱对... 详细信息

针对没有大气压力传感器或大气压力传感器有故障的汽油机,为保证汽油机吸入足够气量而得以正常运行,基于可压缩流体理论,提出了汽油机大气压力预估算法,并通过软件在环仿真,对控制算法进行了初步验证。然后,使用Embeded-Coder工具箱对控制算法进行自动代码生成,并将其载入汽油机ECU中。最后,进行最终实车测试,结果表明上述预估算法可准确计算出与大气压力传感器测量值相符的大气压力值。

关键词：大气压力预估软件在环仿真控制算法实车测试

Research on Knock Control Method of Turbocharged Gasoline Engine

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Research on Knock Control Method of Turbocharged Gasoline En...

2023中国汽车工程学会年会暨展览会

作者： Lei Yanyan Cui Lianghao Huang Haohan Ma Zenghui Qin Long Lei Xue Yang Liuchun zhang Dequan Wang Kai Tian Fengmin zhang fanwu Dongfeng Motor Corporation Technical Center

Knock is an abnormal combustion in the engine cylinder,which reduces the engine power output and fuel economy,and worsens the engine *** this research,the knock of turbocharged engine was divided into conventional knock and super *** knock judgment was mainly based on the knock signal collected by the knock *** knock detection strategy mainly adopted CIC（Cascade Integrator Comb） filter,FIR（Fine Impulse Response Filter） filter,and offset compensation,which were used to process knock *** the characteristic quantity rnock was used to judge whether knock occurs under the current working *** value of this characteristic quantity showed the current knock *** result described that no knock misjudgment occurred under steady-state and transient conditions,and omission judgment rate was less than 5%.This meets engineering error *** knock control was accurate and no limit torque and no super knock caused by abnormal identification,under extreme working *** simulated preignition working points,preignition can be *** Spark angle,fuel enrichment,temporary reduction of air,fuel cut-off and continuous gas reduction can effectively eliminate knock.

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