雷克萨斯车空调工作不正常

一辆2005款雷克萨斯RX300轿车,出现空调工作不正常的现象。客户反映该车空调系统在工作时压缩机曾经有几次喷出液体。在其他修理厂对该故障进行过维修,但未能从根本上排除故障。起动该车发动机并开启空调系统,空调系统开始工作,先将空调设定温度调到最高,然后再调到最低。将空调     

某新能源汽车压缩机接触器绝缘故障问题分析

为了有效解决某量产新能源汽车压缩机使用过程中出现的接触器绝缘故障问题,文章通过实验确定故障主要原因是未考虑电动空调压缩机输入端滤波电容,导致空调压缩机启动瞬间有较大冲击电流,触点铜排烧蚀。对标几种畅销纯电动汽车压缩机控制回路,坚持改动最小且能有效解决问题的原则对量产车型电路进行整改,在现有空调回路中增加预充控制回路。文章分析结果为其他车型空调控制回路设计提出有效思路,避免因大电流冲击导致绝缘问题。     

某SUV空调系统异响问题的分析与优化

针对某SUV怠速开空调车内存在"突突"异响的问题,运用源-传递路径-响应的分析方法,借助噪声和振动频谱相关性分析的手段,确定怠速空调开启时车内异响主要是由于空调系统管路隔振不足导致振动传递引起.通过采用增加空调低压软管长度及在空调管路增加质量块的优化方案,有效解决了空调开启车内异响的问题.     

客车空调压缩机多楔轮系的布置及传动计算

介绍空调压缩机多楔轮系布置结构及其优点,以实例论述多楔带计算过程及计算方法。     

凯美瑞2AZ-FE型发动机异响的检修

发动机异响有以下几种来源：1.发动机附属部件的异响,如发电机、空调压缩机、动力转向液压泵、水泵、冷却风扇等旋转部件异响。2.驱动皮带打滑异响。3.正时皮带或链异响。4.气门异响。5.活塞销运动部件异响。6.活塞与气缸敲击异响。7.活塞环的金属敲击声、活塞环的漏气异响。8.曲轴颈与轴承之间异响。9.曲轴平衡轴颈与轴承之间异响。     

车载冰箱DIY

<正> 我知道你对自己的座驾有诸多不满,恨不得自己动手做一辆出来。虽然有些牛人已经这么干了,但对我等小民,这样的DIY还是从初级阶段开始吧。一些实用且有趣的车用装备我们完全可以依葫芦画瓢。瞧瞧下面的DIY牛人,无论你是开大切还是开的微型车,都不影响我们DIY的乐趣。目前市场上千奇百怪的车载冰箱让人眼花缭乱,如果你不知道怎么     

Dynamic Simulation and Performance Investigation of No-Frost Refrigerator： Part Ⅱ System Simulation and Performance Analysis

The methodology for modeling no-frost refrigerator is described based on the component models developed in Part I, and then, system simulation is applied to a BCD-235W refrigerator-freezer (RF). Experiments are carried out to study “pull-down” and steady-state performance of the RF, and to determine how the experiment and simulation temperature stack up against each other. Good match is found between simulated and measured results for the “pull-down” period. For the steady-state period, the simulation results are also found to agree well with experiment ones except for the temperature profiles of the refrigerator compartment (RC) and freezer compartment (FC). The average temperature and the energy consumption errors between measurement and simulation are less than 10%. Although the model can not reflect the non-uniform air temperature fields in the RC and FC, the variation range and periodicities of the temperature correlate well between the simulation and experiment. We conclude that such a model is valid for investigating the performance of no-frost refrigerator.      

Dynamic simulation and performance investigation of no-frost refrigerator: Part I mathematical model

A dynamic approach for the modeling, simulation and analysis of no-frost Refrigerator (RF) is discussed. In Part I, the complex interactions among the components in the cooling system are analyzed in detail, based on which the modeling simplifications are proposed. Then, the mathematical models for the evaporator, cabinet and duct-fan are presented. The whole system is divided into two subsystems—refrigerant cycling system and air cycling system. In order to simplify the model, two closed-loop systems are broken into the compressor component and the evaporator component, respectively. A general distributed parameter model is employed for evaporator with homogeneous flow to simplify the two-phase evaporating flow region. The z-transfer function model is used to describe the cabinet load. Computational fluid dynamics (CFD) method is employed to obtain the pressure drop and flow rate curve of the duct-fan model.

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戈蓝空调制冷控制失效

故障现象： 一辆行驶了3．2万km的三菱戈蓝,该车空调选择17℃（最冷位置时）,空调压缩机工作制冷正常：超过17℃后空调压缩机不工作,空调不制冷。     

该捷达轿车空调为何不制冷

故障现象：一辆普通型捷达轿车,打开空调后,车内有烧糊焦味,且空调不制冷。 故障检查：根据故障现象,检查继电器盒上空调保险丝,发现其已熔断。拆下继电器盒,拉出里面的线束,发现从蒸发器温度开关至空调压缩机电磁离合器间的线束特别硬,剥开线皮后,发现电线全烧连在一起,说明电路中有短路。进而检查发现其空调压缩机电磁离合器外表面已发黑,测量该离合器线圈的电阻值仅为0．3欧,