Stop Start technology

Rambling from the Sage of Oxford
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Charles
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Stop Start technology

Post by Charles » Sat Oct 11, 2008 5:44 pm

Now I understand the thinking behind this - when a car is at standstill, switch off the engine and save fuel.

But a number of things have been bothering me about it - and not from an emissions control perspective:

- Will all the extra starting cause the starter motor to fail sooner than it might otherwise?

and

- Do you have to look for larger gaps in the traffic because of the delay between wanting to go and the engine starting and actually allowing you to go?
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v8 ego
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Post by v8 ego » Sat Oct 11, 2008 6:41 pm

I don't know much about it but as far as I am aware, the engine only stops when you put your foot on the clutch, put the car in neutral and then take your foot of the clutch. The car starts again when you put your foot on the clutch.
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Post by Dunk » Sat Oct 11, 2008 6:41 pm

I've spent some time with ED BMWs - a 320d and a 120d...

It's unnerving initially, especially if you served your driving apprenticeship with stuff that used to cut out in traffic, and then refuse to start :lol: Manta GTEs, MK.II Escorts etc..

Anyway - in effect, it's restarts as soon as you begin to dip the clutch. So it make no noticeable difference in terms of restarting. It only cuts out when stationary, in neutral, with the clutch up.

The thing which concerns me is that it works excellently in a brand spanking new courtesy car, but I'm not sure of it's brilliance at 120,000 miles with a tired starter solenoid, and having missed a service or two.

Theoretically the starter motor will have a shorter lifespan.
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Post by neil » Sat Oct 11, 2008 6:55 pm

I've not really had much exposure to this technology and not driven a car equip with it (or rather I've driven a car with it - but disabled). The later is an interesting one as your being tax on the benefits of the technology but not actually using them !

In fact the only car I have witnessed the technology is a 1 series that a friend of mine drives. I found it really odd - as you'd expect. You can also prevent the car stopping by keeping the clutch down - which obviously makes you wonder about clutch wear too ? It was odd when he let the engine stop though and you definitely don't win off the line when that happens - but thats hardly good for the environment!

In my mind the system artificially reduces the co2 emissions and therefore your tax liabilities - and you can switch it off (certainly in BMWs) - which sounds like money for nothing ?

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