Bosch柴油机OBD技术及控制策略.pdf
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Bosch柴油机OBD技术及控制策略.pdf
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1OBDTechnologyandControlStrategyforDieselVehiclesRBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsOBDTechnologyandControlStrategyforDieselVehiclesRBCD/EAP博世汽车柴油系统股份有限公司博世汽车柴油系统股份有限公司XuXiaosong柴油车柴油车OBD技术及其控制策略技术及其控制策略2OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsTableofContent目录?
DieselOBDsysteminEU3stage国3阶段的柴油车OBD系统?
PossiblefailuresindieselsystemanditsOBDtechnology柴油系统可能的故障及其相关的在线诊断技术?
EGR废气再循环?
Airflowsensor空气流量传感器?
Railpressuresensor轨压传感器?
OBDcontrolstrategyOBD相关的控制策略?
In-serviceconformitytest在用车符合性检查?
Inspection&Maintenance(I&M)test检查/保养检测?
RelevanttestsoverviewinEurope欧洲相关的检查制度体系?
DevelopmentofdieselOBDinEU4stageanddieselprospect国4阶段柴油车OBD的发展,及柴油车的前景3OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsTableofContent目录?
DieselOBDsysteminEU3stage国3阶段的柴油车OBD系统?
PossiblefailuresindieselsystemanditsOBDtechnology柴油系统可能的故障及其相关的在线诊断技术?
EGR废气再循环?
Airflowsensor空气流量传感器?
Railpressuresensor轨压传感器?
OBDcontrolstrategyOBD相关的控制策略?
In-serviceconformitytest在用车符合性检查?
Inspection&Maintenance(I&M)test检查/保养检测?
RelevanttestsoverviewinEurope欧洲相关的检查制度体系?
DevelopmentofdieselOBDinEU4stageanddieselprospect国4阶段柴油车OBD的发展,及柴油车的前景4OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsSystemOverviewofEU3stage,commonraildieselsystem国三阶段,共轨柴油系统5OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsThemonitoredsystems被监控系统?
OBDrequirestheemissioncontrolsystemstobemonitored,themostimportantsystemsareairsystemandfuelinjectionsystem:
OBD法规要求监测排放控制设备。
最重要的排放控制是燃油喷射系统和空气系统ECUFueltankFilterCommonRailInjectorSensorRailPressureSensorVorfilterMeteringUnitHighpressurepumpInjectionsystem燃油喷射系统Airsystem空气系统6OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsOverviewofdiagnosticsystem诊断系统概况电器连接的诊断传感器空气质量流量轨压传感器转速传感器.执行其喷油器油量控制单元EGR阀功能性诊断控制器偏差合理性检查.发动机ECU自诊断EEPROM检查Watchdog检查诊断管理系统(DSM)故障确认MIL控制故障内存管理标准诊断仪接口MIL诊断仪7OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsTableofContent目录?
DieselOBDsysteminEU3stage国3阶段的柴油车OBD系统?
PossiblefailuresindieselsystemanditsOBDtechnology柴油系统可能的故障及其相关的在线诊断技术?
EGR废气再循环?
Airflowsensor空气流量传感器?
Railpressuresensor轨压传感器?
OBDcontrolstrategyOBD相关的控制策略?
In-serviceconformitytest在用车符合性检查?
Inspection&Maintenance(I&M)test检查/保养检测?
RelevanttestsoverviewinEurope欧洲相关的检查制度体系?
DevelopmentofdieselOBDinEU4stageanddieselprospect国4阶段柴油车OBD的发展,及柴油车的前景8OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsEGR废气再循环?
EGRvalveisdrivenbyvacuumair.EGRsystemiscloseloopcontrolledbyairmassmetering.EGR阀由空气负压驱动。
整个EGR系统根据新鲜空气进气量闭环控制。
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PossiblefailuresinEGRvalveanditsdrivingsystem:
EGR阀及其驱动系统可能的故障为:
?
CokingatEGRvalve,sothatitsblockedEGR阀结焦被卡住?
Airleakageinthedrivingsystem驱动系统管路的泄漏9OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsEGR废气再循环?
ThefailureofEGRvalveoritsdrivingsystemisdetectedbymonitoringthecloseloopcontrolgovernordeviation.Ifthevalveisblockedatsomeposition,atsomeworkingpointstheactualintakeairmasswouldnotbeabletofollowthesetpoint.Thegovernordeviationatthistimewouldbeverybiganditsidentifiedasanerror.EGR阀及其驱动系统的故障由闭环控制系统的控制偏差来监控。
如果EGR阀被卡死在某个位置,则必定在某些工况点上实际进气量不能跟踪设定值。
此时系统控制偏差会很,并将被判定为故障。
10OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsEGR废气再循环?
EGRvalveblockedatopenpositionEGR阀卡死在全开位置Errordetected发现故障11OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsAirflowsensor空气流量传感器?
AirflowsensorisusedtomeasurethefreshairmassthetocloseloopcontroltheEGR.空气流量传感器用来测量新鲜空气进气量,以闭环控制EGR系统。
?
PossiblefailureofAFS:
空气流量传感器可能的故障为:
?
Driftduetopollutionofdust,oil,orwater因为油,水,或者颗粒物的污染造成的漂移12OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsAirflowsensor空气流量传感器?
Whileoverrun,whentheEGRvalveisclosedandnoboostpressure,theairflowcanbecalculatedusingenginespeedanddisplacement.在发动机不喷油,车辆滑行倒拖的状态下。
EGR阀在此状态下应处于关闭状态,并且没有增压压力。
此时的新鲜空气流量可以用发动转速和排量来计算。
?
ThecalculatedairmassisthencomparedwiththemeasuredvaluetomonitortheAFSdrift.计算出来的空气流量与实测的空气流量进行比较,如果差值过大,则检测到空气流量传感器漂移的故障。
13OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsAirflowsensordriftdetectioninoverrun空气流量传感器漂移的监测(kg/h)Errordetected发现故障14OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsRailpressuresensor轨压传感器?
Railpressuresensormeasuresthefuelpressureinthecommonrail,forthecloseloopcontrolofthefuelpressureandtheinjectioncontrol.轨压传感器用于测量共轨管中的燃油压力,以用来闭环控制燃油压力,并进行喷射控制。
?
PossiblefailureofRDS:
轨压传感器可能的错误:
?
Driftduetopollution传感器的漂移ECUFueltankFilterCommonRailInjectorSensorPressureSensorVorfilterMeteringUnitHighpressurepump15OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsRailpressuresensor轨压传感器?
Thedriftoftherailpressuresensorismonitoredinthestartstate,whentheenginespeediszero,ignitionkeyisat“on”positionandnocranking.OBD系统在发动机起动之前,钥匙开关打倒“on”状态,但转速仍为零时,监测轨压漂移。
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Duringthistime,norailpressureisbuildupandtherailpressuresensoroutputshouldequaltotheatmosphericpressure.此时轨压尚未建立,应等于外界大气压力,或约等于零。
?
OBDsystemmeasuretherailpressuresensoroutputatthisconditionandcompareitwiththeatmosphericpressure,ifthedeviationistoohigh,thenaerrorwillbedetection.OBD系统将此时测得的轨压与大气压力进行比较,如果差值过大,则认为检测到故障。
16OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsRailpressuresensordriftdetection轨压传感器的漂移Enginespeed(rpm)Railpressure(bar)Errordetected发现故障17OBDTechnologyandControlStrategyforDieselVehicles柴油车柴油车OBD技术及其控制策略技术及其控制策略RBCD/EAP1-XuXiaosong|23/11/2006|RobertBoschGmbHreservesallrightsevenintheeventofindustrialpropertyrights.Wereserveallrightsofdisposalsuchascopyingandpassingontothirdparties.DieselSystemsTableofContent目录?
DieselOBDsysteminEU3stage国3阶段的柴油车OBD系统?
PossiblefailuresindieselsystemanditsOBDtechnology柴油系统可能的故障及其相关的在线诊断技术?
EGR废气再循环?
Airflowsensor空气流量传感器?
Railpressuresensor轨压传感器?
OBDcontrolstrategyOBD相关的控制策略?
In-serviceconformitytest在用车符合性检查?
Inspection&Maintenance(I&M)test检查/保养检测?
RelevanttestsoverviewinEurope欧洲相关的检查制度体系?
DevelopmentofdieselOBDinEU4stageanddieselprospect国4阶段柴油车OBD的发展,及柴油车的前景18OBDTechno
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