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<正>《机动车安全技术检验项目和方法》(GB 38900—2020)规定,前轴采用非独立悬架的汽车(包括采用双转向轴的汽车,但不包括静态轴荷大于或等于11 500 kg、不适用于仪器设备检验的汽车),转向轮横向侧滑量值应小于或等于5 m/km。对于双转向轮侧滑量的检测,现检测机构在检测实践中出现的触发、控制问题,以下作一些探讨。1产生侧滑的原因侧滑是指车轮胎面在前进过程中的横向滑移现象。转向轮横向侧滑是指前轮前束和外倾角不匹配(前束产生的侧向力和外倾角产生的侧向力不平衡), 相似文献
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汽车转向轮(以下称前轮)侧滑量检测是汽车综合性能检测和安全性能检测的一项重要内容,对侧滑量检测数据进行分析,能够判断前轮前束与外倾角的匹配情况,进而判断车辆的技术状态。侧滑量的检测数据是否准确受很多因素的影响,如车辆驶过侧滑板的行驶速度和行驶的匀速状态,轮胎的气压,轮胎花纹的磨损程度,胎面的清洁状况,载荷大小和转向节轴颈与轴承的磨损程度等。为确保正确判断车辆的状态,《机动车运行安全技术条件》(GB7258—2004)中规定, 相似文献
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CCS转向机构运动分析 总被引:1,自引:0,他引:1
要使车辆在转向过程中全部车轮都不产生侧滑,则要求全部车轮绕同一瞬时转向中心回转。对一种新型转向机构——CCS(Common Center Steering)转向机构进行了运动学分析。该转向机构在转向范围内的所有角度均满足关系式:ctgα—ctgβ=M/L。 相似文献
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从侧向力的角度分析了转向桥为独立悬架的车辆转向轮侧滑的产生机理,对目前常用的两种独立悬架车辆转向轮侧滑试验台的适应性进行了研究分析,提出了改造建议。 相似文献
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双前轴转向汽车车轮转角自动检测系统开发 总被引:1,自引:0,他引:1
现阶段汽车检测线对双前轴转向车辆的检测处于空白状况。本文在分析双前轴转向车辆的转向参数特征基础上,设计了双前轴转向车辆转角自动检测系统,并根据车辆检测数据对转向系的故障进行判定,为双前轴转向车辆检测和维修提供一种可靠、有效的方法。 相似文献
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轮式工程车辆的转向系统要求能够灵活地转向行驶,应避免轮子的滑移或侧滑。常见的工程车辆有两种转向方式,通过对两种转向运动形式进行详细的运动和动力学分析,提出它们的使用范围,并对这两种转向方式的轮式车辆提出应该重视的技术问题及措施。 相似文献
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为了适当调整摇臂机构的设计参数,根据已有的基本型双前桥转向的摇臂机构,用作图法计算出二桥节臂转角β2,再计算出二桥节臂理论转角β2理,根据β2-β2理=δ是否小于1°来判断该机构是否合理;如不合理,通过改变摇臂长度R的尺寸得到合理的数值后,再用三维模型进行了校核,得到了合适的设计数据。此方法缩短了设计周期,为双摇臂机构的设计提供了参考。 相似文献
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本文主要介绍了牵引车双前桥转向系统的设计,转向器、动转泵的匹配设计,并应用UGNX6软件建立了转向系统的三维模型,对转向系统进行设计校核和优化,设计出性能优越的双前桥动力转向系统。 相似文献
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对SX2190驱动前桥进行了系列疲劳寿命试验,探讨了焊缝、凸缘和螺栓对前桥疲劳寿命的影响,试验表明:凸缘和螺栓的结构、焊接质量及抛丸强化对前桥疲劳寿命有较大影响,通过对凸缘结构改进以及销子孔上移降低螺栓拉伸应力,并采取桥壳整体抛丸强化等措施显著提高桥壳的疲劳寿命。 相似文献
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Publio Pintado Miguel-Angel Castell 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1999,31(3):137-155
The dynamic behavior of commercial vehicles fitted with differentr types of suspension mechanisms and steering devices is investigated in this paper. Six vehicle models have been constructed: 2WS-SA is a standard two wheel steering bus with solid axles; 2WS-DW is a 2WSA vehicle with independent double wishbone suspension in front and rear axles; SSA-SA is a 2WS system with solid axles, the rear one being mounted on a self steered mechanism; SSA-DW is a vehicle with independent double wishbone suspension in the front axle, and a solid self steered rear axle; 4WS-SA has four wheel steering with solid axles; and 4WS-DW is a 4WS vehicle with independent double wishbone suspension in front and rear axles. The dynamic response of these models has been assessed in terms of lateral acceleration, yaw velocity, tire forces, tire force reserves, and slip angles. The expected advantages of a 4WS system (higher acceleration rates and lower slip angles) will be corroborated but, at the same time, it will be shown that they are obtained at the cost of lower force reserves. Self steered mechanisms produce smaller body slip angles, but it will be shown that they give rise to larger yaw velocity overshootings. The particular independent suspension analyzed does not show significant improvements with respect to the solid axle counterpart. 相似文献
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本文在对斯太尔重型汽车的双轴转向传动机构进行分析的基础上建立了数学模型,研究了各部分的传动过程,并采用MATLAB语言编写了转向传动机构分析程序,对转向轴内外轮之间,前后轮间的转角匹配,以及最小转弯半径的匹配关系进行了优化。 相似文献
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Basilio Lenzo Aldo Sorniotti Patrick Gruber Koen Sannen 《International Journal of Automotive Technology》2017,18(5):799-811
Electric vehicles with individually controlled drivetrains allow torque-vectoring, which improves vehicle safety and drivability. This paper investigates a new approach to the concurrent control of yaw rate and sideslip angle. The proposed controller is a simple single input single output (SISO) yaw rate controller, in which the reference yaw rate depends on the vehicle handling requirements, and the actual sideslip angle. The sideslip contribution enhances safety, as it provides a corrective action in critical situations, e.g., in case of oversteer during extreme cornering on a low friction surface. The proposed controller is experimentally assessed on an electric vehicle demonstrator along two maneuvers on surfaces with significantly varying tire-road friction coefficient. Different longitudinal locations of the sideslip angle used as control variable are compared during the experiments. Results show that: i) the proposed SISO approach provides significant improvements with respect to the vehicle without torque-vectoring, and the controlled vehicle with a reference yaw rate solely based on the handling requirements for high-friction maneuvering; and ii) the control of the rear axle sideslip angle provides better performance than the control of the sideslip angle at the center of gravity. 相似文献