简介:摘要:目前在汽车空调行业内较为熟知的几项高效空调技术有:采用外控变排量压缩机,在24℃以上环境温度采用车内空气质量传感器自动切换内外循环,使用PWM控制的风机,使用回热换热器,使用带内置式油分离器的压缩机等。系统油循环率和压缩机排油率密切相关,它随着压缩机排油率的增加而增加,随着压缩机排油率的减少而减少。系统油循环率过高,会对空调系统性能产生不利影响,过低又会影响压缩机吸气带油量。因此,需要对系统油循环率加以控制。笔者多年来一直从事涡旋式汽车空调压缩机的开发工作,现通过所熟悉的带油分离器的压缩机及其空调系统,探讨系统油循环率对汽车空调制冷性能的影响,以及如何控制压缩机排油率。
简介:CalculationandErrorAnalysisofElectromagneticTorqueforaWheelPermanentMagnetMotor,Characteristicsofacommon-raildieselinjectionsystemunderpilotandpost-injectionmodes,CharacterizationofcoilfaultsinanaxialfluxvariablereluctancePMmotor,CharacterizationofEvertrollNickel-Zinc,Chargebalancecontrolschemesforcascademultilevelconverterinhybridelectricvehicles。
简介:AnalysisofperformanceresultsfromFutureTruck2001;AnalyticalCalculationofAir-GapMagneticFieldDistributionandInstantaneousCharacteristicsofBrushlessDCMotors;ApplicationofFuzzyControlAlgorithmsforElectricVehicleAntilockBraking/TractionControlSystems;ApplicationStudiesofElectricDoubleLayerCapacitorSystemforFuelCellVehicle;ArbinHighPowerElectricVehicleBatteryTestingSystem(EVTS)“AdvancedTechnologyReachingDeepIntotheFuture”……
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简介:空调系统是乘用车一个主要能量消耗部件。相比于传统乘用车,电动汽车缺少用于乘员舱加热的足够的余热,主要采用电能实现乘员舱冬季加热和前挡风玻璃的除霜除雾功能,因而在低温环境下,电动汽车用于乘员舱加热的电能消耗尤为明显,大幅度缩减电动车续驶里程。另外,对于电动汽车,动力电池可能需要在高温环境下进行冷却。相反,在低温环境下,如果采用热泵空调系统,动力电池和动力电子设备的余热则可被回收用于乘员舱加热。从不同方面对车用空调系统采用热泵技术和采用电加热技术进行优势对比。最后基于电动汽车全年的空调系统能量消耗,对两种空调暖通系统(HVAC)拓扑结构进行比较,介绍电动汽车热泵空调系统的节能效果。