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Stary 10-03-2009, 21:22   #131
danielr
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Zarejestrowany: 21-01-2005
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Model: mondeo mkIV kombi
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Domyślnie Odp: [MK4] - komunikat "wymiana oleju", przybywanie oleju

znalazlem takie cos tutaj: [Tylko zarejestrowani użytkownicy widzą linki. ]

I found this Q&A buried on a Vauxhall forum, it's from a service training guide for their latest-generation DPF equipped cars. Fords don't have a dash warning light on DPF soot-loading, but the principles are otherwise the same.

Obviously the details will differ a little with other manufacturers' DPF implementations, but it does give a good insight into the conditions needed to get typical catalyst-coated DPFs to regenerate, how long a regen. takes, how the ECU manages a regen cycle, effect on oil quality, etc etc.

See especially the Q&A at the end about oil quality.


Question: The glow plug symbol is flashing. Why? What should be done?

Answer: The DPF regeneration has not been completed during normal driving and now DPF has reached its maximum saturation at which it can still be regenerated. The limit value depends on variant and Model Year, but is in the range of 105% - 125%.Possible causes for this are:

a.) Frequent short distance journeys, i.e. high soot loading while at the same time regeneration of the DPF does not take place because the conditions necessary were not fulfilled.

b.) Frequent interrupted regenerations, i.e. the engine was switched off during regeneration. Applies to short journey drivers who have at least fulfilled the conditions for triggering regeneration. If the glow plug light flashes, the vehicle should be driven until it goes out.

Important: Regeneration is carried out more often (2 - 3 times) during the first 1000 km of driving in order to achieve a defined loading status of the DPF. This is necessary to reduce component and system tolerances, and forms the basis for precise calculation of the soot loading in the DPF.


Question: What conditions are required for the DPF to begin regeneration?

Answer: The following conditions must be fulfilled for regeneration to begin.

a.) Engine running since start for longer than 2 minutes.
b.) Calculated saturation higher than 80%.
c.) Coolant temperature over 70°C for at least 2 minutes.
d.) No DPF-relevant faults stored in system.
e.) A defined vehicle speed threshold must have been exceeded (e.g. for >80% loading, 100 km/h)


Question: Under what conditions is regeneration interrupted/ended once it has started?

Answer: Normally when regeneration has been successfully completed, or:

a.) After a maximum regeneration time (20 - 25 min.).
b.) If the engine is switched off or has stalled.
c.) If the engine is left idling for a long time (5 - 10 min.).
d.) If 1000°C is detected by the exhaust temperature sensor.
e.) If during regeneration, a fault is detected on the components relevant for combustion (injection/intake system). If a regeneration is interrupted once started but before it has been 50% completed, the glow plug lamp flashes on the next engine start (cold or hot) and regeneration begins again once the operating conditions (see 3) have been fulfilled.


Question: How long does complete regeneration take? a.) In the most favourable case? b.) In the least favourable case?

Answer: a.) Under constant conditions, i.e. the exhaust temperature necessary for regeneration always lies above the required value, for example during motorway/cross-country driving, the average regeneration time is 10 minutes.

b.) Vehicle conditions such as long down-hill descents, frequent driving in the low-load range (city driving, idling) allow the exhaust temperature to fall. If the conditions for triggering regeneration were fulfilled, the active regeneration time can be extended up to 25 minutes (depending on engine type). If complete regeneration is not possible within this period, the regeneration will be interrupted.


Question: How does regeneration affect the oil life?

Answer: On each regeneration or attempted regeneration, a certain diesel fuel amount is injected into the engine oil which reduces the oil life. If the "INSP" light in the instrument cluster comes on, the engine oil is exhausted and must be changed. Failure to do so could damage the engine.


Edited by Craig140 on 22-12-08 03:13 PM. Reason for edit: No reason given.



Moge to w sumie przetlumaczyc niezbyt wiernie ale bedzie wiadomo o co chodzi.
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