MPG Caps, EGR, Pantone and Mr Lang

[Cuicui]

So creation of a new oil cracking in your engine

Can you explain please?

[Christophe]

Off topic: the EGR valve is not really a hidden defect but rather a big industrial DIY done in a hurry .... There was an article above on the forums it seems to me...

As for Nico's remarks, I prefer not even to raise them ...

[Christophe]

Can you explain please?

He is probably thinking of a "re-burning" (which proves that he does not master the term "cracking") of the particles in the engine ... unfortunately the reality is very different ...

[Other]

Hello

In what year did you have the first ERG valve to arrive on your car, 1975 or 1980?
On gasoline cars it is still livable but on diesels, I do not know some which have which have not blocked the intake manifold is dirty.
It seems to me that this subject has been discussed extensively on the forum.

Andre

[zac]

At the origin of the EGR valve therefore creation of a new oil cracking in your engine !!!

Hello

Ben takes a key of 13 from mechanic lessons and stops saying bullshit bigger than me.

The egr is a piece of shit intended (in theory) to artificially reduce the displacement of an engine, at low revs, by making it fluff its exhaust gases.
the goal being to reduce consumption; the problem is that it ONLY works on a new vehicle. Unfortunately vehicles get old and the reverse is true.

@+

[Christophe]

The egr is a piece of shit intended (in theory) to artificially reduce the displacement of an engine, at low revs, by making it fluff its exhaust gases.

I had never seen it like this but it's a different way of looking at it.

On the other hand, the "main" goal of the EGR is not to reduce the displacement, therefore the engine power, but the T ° of combustion ... well that's what I always "read" .. .

[Other]

Hello
When the automobile manufacturers were made to impose standards for the reduction of the nox (the engine which runs (leaner) make more nox) they understood that it was necessary to dilute the air fuel mixture with an inert gas and the easiest to to do this was to make the engine eat a small part of its exhaust gases.
the goal is to burn at a lower temperature
Currently they are working to pass a greater quantity of exhaust into the engine, so even less gas coming out of the exhaust and obviously less air to be sucked in.
On a diesel the particles are a problem for this valve

Andre

[zac]

On the other hand, the "main" goal of the EGR is not to reduce the displacement, therefore the engine power, but the T ° of combustion ... well that's what I always "read" .. .

Hello

Nice theory of EGR merchant.

In principle, the EGR only works at idle or at very low speed.

So you will have to explain to me how by sending hot gas into the intake instead of fresh gas, the temperature is reduced?

a 2litres eats (theoretically) 2 times more than a 1000cc slowed down, if you fill with "inert" gases (exhaust for example) half the volume you consume, in the non-propulsive phase 2 times less; this is the principle of EGR.

Unfortunately it works really well in the minds of the engineers and the days of the control on a new vehicle, but 50000 km further it works more

@+

PS: don't blame me Christophe for contradicting you, but I'm trying to be constructive

[Christophe]

So you will have to explain to me how by sending hot gas into the intake instead of fresh gas, the temperature is reduced?

Ben sends cold oxygen (e?) And you will see if it decreases the T ° of combustion ...
The combustion T ° depends directly on the richness and therefore on the O2 proportion of the mixture. In fact, the EGR in your definition is the opposite of a Nitrous kit

With the EGR it is not the T ° of the admitted gases that counts but the fact that they are "neutral" gases from a combustion point of view ...

PS: don't blame me Christophe for contradicting you, but I'm trying to be constructive

You're welcome forum it is made for that ...

[Other]

hi Zac

In the same principle if you operate a torch with air which contains nitrogen and oxygen you have less high temperature in the flame than pure oxygen.
For the same reason that nitroglycerin is more violent than dynamite, which has a fixative, all fuels, when inert substances are introduced to them, have a slower combustion.

That the exhaust gases are hot in their system is rather harmful some cool them down.
In gasoline engines the ERG control is a little different from idle diesel at low speed it is completely off
idling diesel has excess oxygen.
the gasoline engine is supposed to have an exact ratio at all revs, normally you could run it a little leaner than 14,7 the reason is because of the nox and the catalyst (although for the catalyst j, I have doubts about it

Andre