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AMT车辆变速系统及控制过程的研究 总被引:2,自引:0,他引:2
介绍了AMT的工作原理、系统组成及AMT车辆发动机的电控调节方式。针对评价换挡品质的3项指标、影响换挡品质的因素及存在的问题,分析了AMT车辆换挡过程中对发动机、离合器、变速器的综合控制及对换挡品质的影响,为进一步提高AMT换挡品质提供参考。 相似文献
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配置:LW9发动机。行驶里程:73000km。
故障现象:客户反映,车辆在早上冷车启动时,发动机怠速不稳、抖动严重,加速时发动机发出“嗒嗒”的异常响声,声音非常大。 相似文献
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车型:和悦、同悦,发动机分别为4GBI、4GB2。行驶里程:1800km故障现象:启动车辆后,等发动机水温到达正常温度后,明最能够听到“哒哒”异响,类似气门异响。发动机水温没有到达正常温度,车辆一切正常,没有“哒哒”异响;启动午辆后,行驶20km左右,车辆怠速,离车辆发动机舱2m左右能够清楚听到“哒哒”异响。随着公里数的增加,“哒哒”异响声音越来越大。 相似文献
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当前.电控发动机已经广泛应用在车辆上。受汽油品质、加注环境以及车辆使用保养等诸多方面因素的影响,电控发动机常会发生喷油器堵塞的故障。喷油器堵塞故障具体可以分为2种情况:一种是个别喷油器堵塞,这将会使发动机转速不稳;另一种是所有喷油器都堵塞,这将会使发动机的混合气明显变稀。 相似文献
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故障现象:一辆发动机型号为CA6110—013型的太湖牌客车,在高速公路上行驶时,驾驶员发现机油温度表上显示机油温度过高,停车对发动机各部位进行检查,机油和冷却水均正常。为赶时间,继续行驶近3公里后,感到车辆动力明显不足,发动机工作声音粗暴沉闷,停车再次检查时,发现发动机第2缸左侧有一面积约为24平方厘米的破孔,发动机已经不能再次启动。 相似文献
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《JSAE Review》2002,23(4):435-441
The vehicle acceleration performance, the accelerator pedal controllability etc. have influence on the engine sound evaluation besides the sound level and quality. Subjective evaluation of the engine sound by the design of experiments was conducted with a driving simulator. As a result, the effects of the vehicle performance and the accelerator pedal controllability for the engine sound evaluation were measured quantitatively. It became clear that these factors could improve both “quiet feeling” and “sporty feeling” which show the evaluation of engine sound. 相似文献
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《JSAE Review》1998,19(3):243-249
Reducing engine noise is one of the most important issues in lowering vehicle exterior noise. An engine under-cover is one effective measure for reducing engine noise. However, the size of the under-cover is limited by the need to ensure sufficient engine cooling performance. To solve this problem, a new sound insulation panel with ventilation holes was developed and applied to the engine under-cover. The panel accomplishes sound insulation by controlling the acoustic anti-resonance of sound waves transmitted through the ventilation holes. This paper describes guidelines for applying the panel to the engine under-cover from the viewpoints of acoustics and fluid dynamics. 相似文献
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《JSAE Review》1997,18(3):277-282
A technique based on the principle of acoustic reciprocity has been developed for measuring acoustic transfer functions of sound radiation from vibrating surfaces of the engine, power train, exhaust system and tires. In many realistic cases of sound radiation, reciprocal measurements of transfer functions are usually more convenient and mostly more accurate than the corresponding direct measurements. This paper explain the basic acoustic reciprocity and experimental setup and illustrate its benefits by application to measurements of transfer functions of sound radiation from the engine of a fully trimmed vehicle. 相似文献
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对大型豪华客车的车外噪声进行了研究,用声强法对车外噪声的主要声源进行了鉴别。对发动机及辅助装备的工作室声学特性进行了测试分析,提出了控制车外噪声的相应策略,并作了遮蔽发动机噪声的模拟试验。 相似文献