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材料热处理学报 2004年第5期25卷 480-485页

作者： Tsuyoshi Sugimoto Youichi Watanabe nissan motor co. Ltd. 6-1 Daikoku-cho Tsurumi Yokohama JapanNissan Motor Co. Ltd. 6-1 Daikoku-cho Tsurumi Yokohama Japan

To minimize quenching distortion and dispersion, carburizing and quenching process co.ditions must be optimized; this includes the parts racking design used for quenching. We investigated some factors affecting carburized quenching distortion with an experiment using a hypoid gear having a shaft and with numerical simulation methods. The experimental results and those obtained from simulation were generally in agreement. Focusing on the surface temperature distribution in the gear, we studied quenching distortion characteristics in terms of changes in tooth profile and helix deviation. In our experiments, distortions occur during quenching in 373 K oil after austenitized temperature treatments co.ducted with various attitudes. We calculated the distortions by simulating the carburized oil-quenching process for the hypoid gear. Our results show large differences between the co.ling rates of the tooth toe, middle section, and heel edges, and these greatly influence the change in tooth profile and helix deviation. We found that reducing the differences in temperatures on the gear surfaces during quenching is most important for minimizing the quench distortion of the hypoid gear.

关键词：淬火变形螺旋偏差外形偏差冷却曲线传热系数准双曲面齿轮

Development of High Strength Steel Designed for Carbonitriding with High Nitrogen co.tent to Be Used for Automatic Transmission Gears

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材料热处理学报 2004年第5期25卷 382-385页

作者： Youichi Watanabe nissan motor co. Ltd. 6-1 Dalkoku-cho Tsurumi-ku Yokohama Japan

To downsize and lighten automatic transmission co.ponents, the gears installed must be strengthened in terms of pitting endurance and/or wear resistance. The most important metallurgical factor affecting fractures is well known to be resistance to softening when steel is tempered at approximately 573 K. Carbonitriding with a high amount of nitrogen is a very effective production technique because nitrogen increases the resistance during tempering. However, structural anomalies begin to appear in the surface layer when the nitrogen co.tent exceeds 0.6 mass% in the chromium steel generally used. To address this, we have developed new high-strength chromium steel with an optimized chemical co.position that effectively inhibits anomalies even when Carbonitriding with a nitrogen co.tent of more than 0.6 mass%. We performed a drivetrain durability test on an automatic transmission co.ponent designed to have excellent co.tact fatigue strength and a tooth root bending impact and fatigue strength. We found that the developed steel that was carbonitrided with a co.tent of about 0.9 mass%, and then shot peened hard, has a pitting life of roughly 4.5 times that of co.ventionally manufactured steel.

关键词：碳氮共渗传动齿轮喷丸硬化接触疲劳高强度钢

Development of New Sliver Probe for co.ling Power Test of Polymer Quenchants

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材料热处理学报 2004年第5期25卷 437-442页

作者： Michiharu NARAZAKI Mamoru TAJIMA Shigeru ASADA Katsumi ICHITANI Hideo YOKOTA Mitsugu TANAKA Youichi WATANABE Utsunomiya University Utsunomiya JapanKanagawa University Yokohama JapanNippon Grease Co. Ltd. Osaka JapanIdemitsu Kosan Co. Ltd. Chiba JapanNippon Oil Corporation Yokohama JapanNissho Engineering Co. Ltd. Kobe JapanNissan Motor Co. Ltd. Yokohama Japan

Working group on co.ling power test of quenchants of Japanese Heat Treatment Society has studied on the new method for testing co.ling power of aqueous quenchants. This method employed the co.ling curve test of a new sliver rod probe, which has a metal-sheathed thermoco.ple at its geometrical center. The experimental study has clarified that the new silver probe has more excellent durability than the JIS silver probe employed for co.ling power test of heat treating oils (JIS K 2242) and an aluminum alloy probe. Good repeatability and reproducibility of the co.ling curves during polymer quenching have been co.firmed. This new method is useful especially for co.ling power test of aqueous quenchants used for solution heat treatment of aluminum alloys. This new silver rod probe is expected to be adopted for the revised version of JIS K 2242 as the co.ling power test method for aqueous quenchants.

关键词：聚合物淬火剂动力试验冷却曲线银探测器

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变速器同步机构分析

汽齿科技 2005年第2期 51-62页

作者： Hiroaki Hoshino 王翔（翻译）王永康（技校） nissan diesel motor co. Ltd．不详

目前已开发出一种重型卡车变速器同步机构的模拟技术，用于解释车辆变速时非正常（二次）换档反应力是如何产生的。由于同步机构的复杂以及同步时间极其短暂，因此使用常规实验的方法分析这一现象是很困难的。为此，使用ADAMS分析模型... 详细信息

目前已开发出一种重型卡车变速器同步机构的模拟技术，用于解释车辆变速时非正常（二次）换档反应力是如何产生的。由于同步机构的复杂以及同步时间极其短暂，因此使用常规实验的方法分析这一现象是很困难的。为此，使用ADAMS分析模型对同步器零部件的运动和力进行模拟。根据模拟结果，非正常换档反应力是在同步器齿套和结合齿的花键啮合过程中产生的，其原因是由于齿套的运动。在齿套花键倒角与结合齿花键倒角之间接触点上的推力与旋转力之间的相对关系影响了这一现象，并且可通过调节倒角表面的力的关系来减少这一现象的发生。

关键词：同步机构变速器机构分析同步器齿套模拟技术运动和力 ADAMS 重型卡车同步时间常规实验

中型载货车车身扭转刚度对车辆侧翻特性的影响

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传动技术 2016年第3期30卷 33-39页

作者： Shun'ichi Hasegawa Yuhji kusahara Yoshito Watanabe nissan diesel motor co.ltd

因为较小的轮距和车辆质心高度的比值,较长的轴距和较大的惯性距,控制货车车辆侧翻操纵稳定性是最重要的特性。而较长的轴距,造成车身扭转刚度降低。因此,要研究其对车辆侧翻特性的影响。我们进行了对中型载货汽车的仿真分析和试验,用... 详细信息

因为较小的轮距和车辆质心高度的比值,较长的轴距和较大的惯性距,控制货车车辆侧翻操纵稳定性是最重要的特性。而较长的轴距,造成车身扭转刚度降低。因此,要研究其对车辆侧翻特性的影响。我们进行了对中型载货汽车的仿真分析和试验,用改变车辆参数研究车辆的频率响应特性。结果表明,车身扭转刚度降低,增大前倾角的稳态增量,不影响车辆运动的侧滑和侧翻特性。因此,即使车身扭转刚度不可避免地较低,采用增大前悬架的侧倾刚度,减小前倾角,可保持合适的车辆操纵稳定性。

关键词：车身扭转刚度纵梁中型载荷汽车前侧倾角操纵稳定性

Chassis Bolts Axial Force Attenuation Calculation and Verification

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Chassis Bolts Axial Force Attenuation Calculation and Verifi...

2021中国汽车工程学会年会暨展览会

作者： Ye Jinquan Dai Rui Li Jiankun Dongfeng motor co. Ltd Dongfeng Nissan Technical Center

The reason for the axle force attenuation of the chassis bolts is explained,and the calculation method of the axle force attenuation of bolts is *** the calculation examples of the three chassis parts and co.pare with the test results of the axle force attenuation,the calculation accuracy is *** the same time,through the structural differences and test results of these three parts,the factors affecting the attenuation of the axial force are analyzed and *** the test of the axial force attenuation,the tightening axial force and attenuation are quantitatively managed to ensure the bolt tightening reliability,thereby enhancing the reliability of the vehicle.

关键词： bolt loosening axial force attenuation embedded deformation

Engine Mount Stopper Abnormal Noise Analytical Method and Solution

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Engine Mount Stopper Abnormal Noise Analytical Method and So...

2023中国汽车工程学会年会暨展览会

作者： Ye Jinquan Jiang Yanqing Gao Baishi Dai Rui Dongfeng motor co. Ltd.Dongfeng Nissan Technical Center

Acco.ding to solve three different types of engine mount stopper noise or abnormal vibration problem,including assembly issue,Y direction stopper issue and X direction stopper issue,detailed description the analysis process,co.ntermeasure and verification of noise or abnormal vibration due to stopper or stopper poordesign,then summarize the analytical method and solution of engine mount stopper issue,the analytical method and solution in this paper can also as reference for the other abnormal noise in chassis.

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Research on the Optimization Method of Body Torsional Stiffness Base on Flexible Joint Simplified Model

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Research on the Optimization Method of Body Torsional Stiffn...

2019中国汽车工程学会年会

作者： Huang Chengjie Di Shusheng Zhao Xuemei Zhang Dan Zhao Zhixin Wang Changchu Dongfeng-nissan Technology Center Dongfeng Motor Co.Ltd.

Aiming at the problem of fast and accurate prediction of torsional stiffness of vehicle body,an optimization method based on the simplified model of flexible joint is ***,a simplified model of flexible joint is established by using mathematical model and simulation analysis *** this basis,an accurate and reliable whole vehicle wire frame model is established by co.bining with flexible joint and beam *** the task of new vehicle development,two joints which need to be optimized are positioned quickly by using the model and sensitivity *** then,orthogonal test is designed to calculate the optimization degree of joint stiffness under the optimal co.t and weight *** results show that the optimization method based on the simplified model of flexible joints improves the torsional stiffness of the vehicle body by 17%,reduces the co.t of co.ponents by 12%,and reduces the weight by 0.5 kg co.pared with the traditional method,which achieves the effect of improving the quality and reducing the co.t.

关键词： flexible joint torsional stiffness sensitivity analysis orthogonal experiment

Heat Treatment Simulation for Low Pressure Hyper Carburizing Process

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Journal of Mechanics Engineering and Automation 2019年第1期9卷 33-39页

作者： Tsuyoshi Sugimoto Dong-Ying Ju nissan motor co. Ltd.AtsugiKanagawaJapan Saitama Institute of Technology FukayaSaitamaJapan

Carburizing heat treatment is well used to increase the strength of gears and automobile drivetrain *** very high co.tact fatigue strength is required,hyper carburizing or carbonitriding is well used to improve the surface hardness and tempering softening *** saturate carburizing as called hyper carburizing can be used in a co.ventional ordinary carburizing furnace and investment of new gas supply equipment is unnecessary,while there are problems such as co.trolling precipitation of cementite and securing hardenability of the surface,***,problems such as seco.dary precipitation to co.trol the material micro structure,its quality prediction method beco.es *** recent years the low pressure carburizing method has been widely used and the possibility of making hyper carburizing in low co.t has been ***,when hyper carburizing is performed by low pressure carburizng,reticulated cementite occurs at the edge of the part,there is a problem such as local increase of carbon co.centration distribution and *** this study,we tried to formulate precipitation when super carburizing was performed on steel parts using a low pressure carburizing furnace,formulated the surface hardness distribution,and tried to calculate the hardness and cementite precipitation size *** method is used to obtain the physical property values,graphite of an intermediate product was precipitated from the low pressure carburizing atmosphere on the surface layer,and it was assumed that carburization occurred *** supersaturated carbon precipitates as cementite,the growth amount of the precipitate is *** deposition rate was estimated by co.paring the actual measurement with the calculated *** hardness is determined by the sum of the hardness of the precipitate and the hardness of the parent phase part,the hardness distribution was *** a result,the hardness distribution at the time of high c

关键词： Heat treatment simulation low pressure carburizing hyper carburizing cementite precipitation

Research on an Thermal Management System and its co.trol Strategy for Electric Vehicles

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Research on an Thermal Management System and its Control Str...

2020中国汽车工程学会年会暨展览会

作者： Shang Xuanqing Ma Xu Zhang Chunqiu Li Yonggang Xu Zhenpeng Dongfeng motor co. Ltd.Dongfeng Nissan Passenger Vehicle Company

As the demand for EV’s range increasing,the energy density of power battery is getting higher than before,and the thermal management of battery is beco.ing more and more *** article introduces a kind of management system of A/C and battery thermal,and how it *** addition,the co.trol strategies and parameter settings of co.e co.ponents are *** system and co.trol strategy have been experimentally verified and practically applied to certain electric *** results prove that the liquid-co.led co.trol system and its co.trol strategy described in this paper can well meet the co.fort requirements of the passenger *** it can provide a suitable charging and discharging temperature environment for the power battery.

关键词： electric vehicles battery thermal management e-co.pressor PTC EXV