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How do Diesel cars start?

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Old 03 April 2004, 07:07 PM
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SC008Y_MAD
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Default How do Diesel cars start?

I have herd that they do not have a spark plug as such? is this true?

...And instead of a spark plug, they heat up some of the fuel and fires/starts on that!

anyboby shed some light on this subject!

SC008Y_MAD
Old 03 April 2004, 07:13 PM
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zxr750Nick
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Originally Posted by SC008Y_MAD
I have herd that they do not have a spark plug as such? is this true?

...And instead of a spark plug, they heat up some of the fuel and fires/starts on that!

anyboby shed some light on this subject!

SC008Y_MAD
Compression ignition of the fuel vapour....... Compression is 23:1 or so and as when you blow up a bike tyre with a pump, compressed gas gets ruddy hot. Then bang.....

Nick
Old 03 April 2004, 07:13 PM
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Cupramax
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Diesel engines work on compression ignition i.e they have a lot higher compression ratio than a petrol mota and that causes enough heat when the fuel is injected for it to ignite without a spark. No spark plugs.... although the older diesels used to utilise glow plugs to warm up the cylinders when starting. Not sure if the newer models have them???....
Old 03 April 2004, 09:46 PM
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mik
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Originally Posted by Cupramax
Not sure if the newer models have them???....
They do.
Old 03 April 2004, 11:28 PM
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J4CKO
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Ah, you use a bike pump to start a Diesel, cool.
Old 04 April 2004, 12:44 AM
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ALi-B
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Most small diesel engines use glow plugs...larger more antiquted engines like the old transit diesel didn't use anything, Although there was a lever you could push on the pump on some of them that could get a reluctant (knackered) engine running.

Most larger Japanease diesels, like shoguns, pick ups and vans actually have choke levers.. Not sure what they do, they seem to up the idle speed. But not sure what else they do.

Large truck engines can have a button which operates a pump which sprays an equivelant to EZ-start into the inlet manifold.
Old 04 April 2004, 03:05 AM
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FLAT ERIC
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http://auto.howstuffworks.com/diesel1.htm

So that is how its done.

Most Powerful Diesel Engine in the World

And its Japanese.No good through the twisties though.
Mark

Last edited by FLAT ERIC; 04 April 2004 at 03:12 AM.
Old 04 April 2004, 09:52 AM
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NotoriousREV
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with a clatter and a cloud of smoke, usually
Old 05 April 2004, 06:21 PM
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Franx
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Black, noxious smoke at that
Old 05 April 2004, 06:46 PM
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CrisPDuk
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Ali B That choke lever is for increasing the revs at idle, to run front mounted winches, hydraulic gear etc. You have to fit one yourself if you're putting a winch on a Landy.
Old 05 April 2004, 06:54 PM
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slowly usually
Old 07 April 2004, 06:20 PM
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Midmotorsteve
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i just got a 1991 205 1.8 diesel as a run around, smokey ******* of a car, clouds of it, i think warm idle is set to high, runs fine all day though.
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