SSP 350 â The 3.0l V6 TDI engine - Volkspage

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Engine mechanical systemRegenerationTo prevent the particulate filter from becoming blocked with carbon particles, thereby impeding its function, it mustbe regularly regenerated. During the regeneration process, the carbon particles which have collected in theparticulate filter are burned (oxidised).During regeneration of the catalytically coated particulate filter, a distinction is made between passive and activeregeneration. This process is imperceptible to the driver.Passive regenerationDuring passive regeneration, the carbon particles arecontinuously combusted without engine managementsystem intervention. This is primarily carried out athigh engine loads, e.g. motorway driving, at exhaustgas temperatures of 350 – 500 °C.In this case, the carbon particles are converted tocarbon dioxide via a reaction with nitrogen dioxide.Active regenerationIn urban traffic, i.e. low engine load, the exhaust gastemperatures are too low for passive regeneration. Asno further carbon particles can be degraded, thecarbon accumulates in the filter.As soon as a specific level of carbon has beenreached in the filter, active regeneration is introducedby the engine management system. This process takesapproximately 10 – 15 minutes. The carbon particlesare combusted together with oxygen at an exhaustgas temperature of 600 – 650 °C to form carbondioxide.34
Active regeneration functionThe particulate filter's carbon level is calculated by two pre-programmed level models in the engine control unit.One carbon level model is determined from the user's driving style and the exhaust gas temperature sensor andlambda probe signals. The other carbon level model is the diesel particulate filter's flow resistance, which iscalculated from the signals output by exhaust gas pressure sensor 1, bank 1 exhaust gas temperature sender 2and the air mass meter.Air mass meter G70Exhaust gas pressuresensor 1 G450Bank 1 exhaust gastemperature sender 2 G448Diesel direct injection systemcontrol unit J248Diesel particulate filterS350_037As soon as the carbon level limit value has been reached in the particulate filter, active regeneration is introducedby the engine management system. The following measures lead to a specific, temporary increase in exhaust gastemperature to approximately 600 – 650 °C. In this temperature range, the carbon collected in the particulate filteroxidises to form carbon dioxide.●The intake air supply is regulated via the electricthrottle valve.S350_041●Exhaust gas recirculation is switched off to increasethe combustion temperature and the oxygencontent in the combustion chamber.S350_03835
Page 2: The range of engines fitted in the
Page 6 and 7: Engine mechanical systemCylinder bl
Page 8 and 9: Engine mechanical systemCylinder he
Page 10 and 11: Engine mechanical systemAir intake
Page 12 and 13: Engine mechanical systemBacklash co
Page 14 and 15: Engine mechanical systemChain drive
Page 16 and 17: Engine mechanical systemLubrication
Page 18 and 19: Engine mechanical systemOil panThe
Page 20 and 21: Engine mechanical systemCrankcase b
Page 22 and 23: Engine mechanical systemCoolant cir
Page 25 and 26: Injectors (piezo injectors)The 3.0l
Page 27 and 28: From the high-pressure accumulator,
Page 29 and 30: TurbochargerIn the 3.0l V6 TDI engi
Page 31 and 32: Exhaust gas cooling switched offUp
Page 33: StructureThe diesel particulate fil
Page 37 and 38: Diesel particulate filter warning l
Page 39 and 40: ActuatorsIntake manifold flap motor
Page 41 and 42: Designation Tool UseT40062AdapterFo
Page 43 and 44: Solutions:1. a; 2. b; 3. b; 4. b43

SSP 350 â The 3.0l V6 TDI engine - Volkspage

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SSP 350 â The 3.0l V6 TDI engine - Volkspage