汽车专业英语汽车专业英语王锦俞主编分析.pptx

汽车专业英语Unit3ElectronicFuelInjection第三单元电控燃油喷射(EFI)3-1ElectronicFuelInjectionDescription电控燃油喷射介绍1------------------------ECU=ontrolunit电控单元3------------ignitioncoilwithigniter带点火器的点火线圈COP=coil–on-plug装在火花塞上的点火线圈4----wiringharness ,,theengineECUdeterminesthefuelinjectionvolumeforachievingthetheoreticalair-fuelratio,inordertoensuretheproperpower,fuelconsumption,,suchasduringwarm-up,acceleration,deceleration,orhigh-loaddrivingconditions,theengineECUdetectthoseconditionswiththevarioussensorsandthencorrectsthefuelinjectionvolumeinordertoensureanoptimalair--2TypesofEFI电控燃油喷射的类型L-EFI----空气流量控制型电控燃油喷射,带空气流量计的电控燃油喷射D-EFI----歧管压力控制型电控燃油喷射,压力测量式的电控燃油喷射1----oxygensensor氧传感器2----sparkplug火花塞3----injector喷油器4--------AFM#----MAP#----IATsensor=intakeairtemperaturesensor进气温度传感器6----freshair新鲜空气7----bypasstract旁通气道8----ISCV=idlespeedcontrolvalve怠速控制阀9----TPS=throttlepositionsensor节气门位置传感器10-----EFI(Air-flowcontroltype):Onedirectlymeasurestheintakeairmass,-EFI(Manifoldpressurecontroltype)Thistypemeasuresthepressureintheintakemanifoldtodetecttheamountoftheintakeairusingtheintakeairdensity.