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12th December 2013, 00:27 | #11 | |
I really should get out more.......
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Quote:
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12th December 2013, 01:08 | #12 |
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Do'hh, my car has the water jacket on the EGR..
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12th December 2013, 07:10 | #13 |
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In which case an egr bypass may not be such a good idea, if you want the car up to temperature as quick as possible?
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12th December 2013, 08:24 | #14 |
I really should get out more.......
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Its a trade off between quicker temps or slightly more performance as when the exhaust gas has been passed back into the combustion chamber there is a lot less oxygen available to combust resulting it less performance than if there was no egr
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12th December 2013, 08:54 | #15 |
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But a diesel engine is nowhere near stoichiometry, so that's not quite the case.
EGR is basically a diluent gas containing a large quantity of water vapour, it is basically in inert heatsink for the gas charge in the cylinder, reducing peak temps and thereby reducing NOx. EGR operates at low-moderate load (over the NEDC operating range). |
12th December 2013, 18:54 | #16 |
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Thats easy for you to say
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12th December 2013, 19:11 | #17 |
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As long as they're kept clean, the EGR doesn't tend to cause too many issues on our cars (save for clogging up the inlet manifold).
I've actually reconnected mine, as I found I had the water-cooled EGR. I hit middle on the temp gauge after just a few miles, and noticed this increased a lot with the EGR disabled.
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13th December 2013, 18:35 | #18 |
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I was under the impression the water cooled egr pipe was fitted solely to the diesel automatics.
Either way, if you have one get the bleed screw replaced as they degrade and rot. Mine leaked, and as the pipe gets hot it evaporates and you never notice. |
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