DMF and Stop/Start Technology

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Mon 22 Mar 2010 08:31
DMF and Stop/Start Technology - DavidGlos

i was doing a little research into Dual Mass Flywheels the other day. Some of the information came from Wikipedia, so i can't vouch for it's accuracy, but more than one website suggested the following. on the proviso that the driver of a DMF equipped vehicle drives it with some mechanical sympathy (no slipping the clutch, full throttle standing starts etc.), the time that the DMF takes something of a pounding is when the engine is started or stopped.

This got me thinking... Given the current trend for stop/start technology to reduce emissions, could this have a negative impact on DMF life? i know that starter motors, batteries etc are beefed up to take account of the stop/start facility, but i doubt whether anybody has started fitting a more robust DMF.

Thoughts...?

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Mon 22 Mar 2010 11:20
DMF and Stop/Start technology - kithmo

Maybe the Stop-Start versions don't have a DMF ?

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Mon 22 Mar 2010 16:10
DMF and Stop/Start technology - Graham567

i had heard that as long as the clutch is pressed in when stopping or starting the car then the dmf doesn't suffer.

My Mondeo will only allow me to push the starter button if the clutch is depressed.

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Tue 23 Mar 2010 13:49
DMF and Stop/Start technology - WellKnownSid

what about that other great motoring invention - the Diesel Particulate Filter?

one would have through that during start-up there was bound to be a bit of over-fueling (or rather, under-combustion) and hence a surge of particulates. i know our Fiat multijet always likes to let out a generous puff of black soot every start, even when hot ;)

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Wed 24 Mar 2010 05:06
DMF and Stop/Start technology - Honestjohn

i'm watching and waiting.

but DPF technology is now in its 3rd or 4th phase.

instead of injecting extra diesel into the combustion chambers and hoping the extra heat generated will regenerate the DPF, most of the new ones now inject diesel directly into the DPF and ignite it directly. So no more sumps full of diesel and engines running uncontrollably on the sump oil.

that was not a problem with PSa/Ford and Mercedes DPFs because they use an additive to regenerate.

but a lot of first generation PSa DPFs (or FaPs, as they call them) are now coming to the ebd of their lived and needing to be replaced anyway, at around £500 a pop.

that can make you think a bit when an ageing 406 or c5 diesel with a 'FaP' may only be worth £1,000 - £1,500.

hJ

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