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With an advanced foreign hydraulic automatic transmission as the objective, an analytical method for the gear-shifting schedule is proposed. First the demanded maximum gradient of test is estimated. Then a test scheme and analytical procedure is formulated by initial test and hypothetical shift parameters. Finally through gear-shifting tests under different road conditions, load, accelerator pedal position limitation, throttle opening and output shaft speed are found to be the gear-shifting parameters. Under a common road condition, the gear-shifting schedule is a double-parameter schedule. Based on the driver''s demands on braking and dynamic performance, different shift schedules are made under downhill, uphill and quick releasing acceleration pedal conditions. The operation criteria of down-shift schedule on abrupt grade are proposed. 相似文献
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随着AMT控制技术的不断提升,如何快捷有效地进行AMT下线检测,成为AMT生产商日益关注的问题。设计并开发了AMT下线检测试验台及测控系统。试验台通过电机将动力由变速器输出轴输入,由惯量飞轮模拟整车惯量,从而模拟车辆稳速行驶时的工况,实现对变速器总成不同转速下的换挡测试。试验台测控系统采用Modbus协议实现了对变频器的控制,采用UDS协议实现了上位机与TCU的通信。测控系统采用LabVIEW开发,该软件在人工监控下,能自动完成变速箱的装夹、检测和拆卸,操作简便,为AMT的批量生产和检测节约了成本。 相似文献
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注射成型技术近期发展动向 总被引:2,自引:0,他引:2
注射成型技术近期发展动向翟涌,张景芳编译1前言注射成型技术广泛用于汽车、家电、电子设备、办公自动化设备、家庭日用品、建材等诸多领域。有效地利用现有的自动化生产系统,力求小型化、一体化、复合化,使最终产品低成本、高附加价值,塑料注射成型的应用范围正在不... 相似文献
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Based on detailed analysis of vehicle dynamics, the theoretical jerk characteristics of tracked vehicles at starting phase are expressed. The experimental research on jerk characteristics under different control parameters is carried out during main clutch engaging process of AMT vehicles in terms of acceleration measurement. The test results show jerk calculated from acceleration signal is convincing and basically consistent with the subjective feeling of passengers. And the test results have practical value for the objective evaluation and the improvement of starting smoothness of AMT vehicles. 相似文献
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新型多元醇可使聚氨酯泡沫塑料的生产少用或不用含氯氟烃翟涌译马振文校为了在生产聚氨酯泡沫材料过程中不用或少用含氯氟烃发泡剂,Perstorp公司已开发了三种新型多元醇。这些新产品中,其中一种粘度低,有利于流动和发泡,其它两种羟基数高,反应性好。第一种多... 相似文献