pantone mounting Truck Renault B70

[PITMIX]

do not worry about birds of evil that tell you that your breech is going to melt

hi Zac
When an experimenter told me:
"it is necessary to isolate the reactor so that it functions in winter "
I then asked:
"Yes, but in summer is there any risk of overheating the engine or burning a valve?"
The guy answered me:
"No, but if you want to be clear, measure the temperature of the collector with a thermocouple probe at the third cylinder, if the temperature is higher with the thermally insulated reactor than with the original exhaust then I all wrong "

It goes in the same direction as what you say so there are no birds of misery.

[Other]

hi Pitmix

Some self insulation exhaust duct is original
GM drives 3 cylinders forward and in a box with rock wool to prevent too much heat from escaping into the engine compartment.

the story of the cylinder No 3 I do not know what this comes to do versus the other cylinders? (this is a special case for a specific model?)
What makes the valves burn on a gasoline engine is mainly an exhaust gas temperature that is too high for relaxation, generally running in full power with a mixture that is too lean (the combustion is bad and continues during the entire relaxation cycle). .
Too much restriction at the outlet of the cylinder head or the clogged catalyst. (This is the part that interests us on the panton.

When the insulation of the reactor is imperative on a car, very rarely one uses enough power to have a good heat on the panton, especially on a diesel one is always on the minimum limit of heat.

In auto exhaust systems, the method of lowering the exhaust gas temperature is to relax in a larger duct and then a cooling pot and a silencer, where the exchange of the high temperature takes place. is in the short exit passage in the breech.

The freshwater boat engine, the exhaust manifolds are cooled with water, there is no silencer, the exhaust is under water. this principle is to prevent that in the engine compartment the temperature does not rise too much.

the insulation of an exhaust duct n, will not increase the temperature at the valves.

when we talk about temperature it is necessary to specify exhaust gas or engine liquid, it is two things differrente.
The right measurements are made with a probe that pans in the middle of the exhaust duct. EGT

When you deplete the mixture on a refriodi engine in the air the temperature of the cylinder head increases slightly, while that the exhaust increases dangerously, that of the oil does not move almost.

When the restriction of the reactor on the exhaust duct, you know my position and that of ZAC it takes a restriction, this value must not be lower than the passage of the exhaust valve.
whatever the engine specialists say, to run a panton you can not pass by that, or it takes another way to heat the reactor.

If other panton fitters succeed in heating a reactor by enlarging the exhaust duct outside the reactor, I would like to have feedback, because it is not easy to recomend this part of the assembly.
Andre

[MichelM]

Bonjour à tous
Finally, while cooling (strongly) the exhaust gases with the reactor, is it not normal that they occupy less space and that a reduction can be made without hindering the flow of these exhaust gases?
Michel

[laurent.delaon]

hello michelm

finely observed I find your remark relevant and intelligent!
(It's been a long time since I read it here ...)
Despite this comment I think that this does not explain everything and that the main effect is due to water vapor.
the future will tell us more ...

[MichelM]

Hello Laurent
Thank you but it's just a reflection that I had like that, if the gases are strongly cooled they occupy less space but from there to explain that it is absolutely necessary a restriction for a good functioning .... I do not do not have enough knowledge to conclude what is the major effect of the restriction, just gain in heat transfer? The main thing is still hot and humid air that passes into the reactor and changes state, or only warms up and improves combustion or relaxation in the engine phase ...
Michel

[zac]

Hello Laurent
Thank you but it's just a reflection that I had like that, if the gases are strongly cooled they occupy less space but from there to explain that it is absolutely necessary a restriction for a good functioning .... I do not do not have enough knowledge to conclude what is the major effect of the restriction, just gain in heat transfer? The main thing is still hot and humid air that passes into the reactor and changes state, or only warms up and improves combustion or relaxation in the engine phase ...
Michel

Hello
I think the restriction (essential) to especially for effect of accelerated gases so 1: increase the temperature 2: improve the magnetization of the reactor. 2 cumulated effects make the difference between a pantone that works or not !!!
the humid air is changing, I'm sure, why, how? There is the question!!!
@+
@+

[Other]

Hello MichelM

Hello Laurent
Thank you but it's just a reflection that I had like that, if the gases are strongly cooled they occupy less space but from there to explain that it is absolutely necessary a restriction for a good functioning .... I do not do not have enough knowledge to conclude what is the major effect of the restriction, just gain in heat transfer? The main thing is still hot and humid air that passes into the reactor and changes state, or only warms up and improves combustion or relaxation in the engine phase ...
Michel

You are right for the restriction that apparently is one if the gases remain hot, if it refrois it is no longer a restricoin
Very often in an exhaust system the ducts become smaller at the exit of the silencer.
But there is still a restriction that is made on the nose of the reactor gases are still hot and the heat has not yet transferred into the reactor.
To have to work on the industrial furnaces in a rolling mill, we can make the same observation when we close the butterfly chimney at the end of the chimney is lightly pressurized the oven the billets heats up more, if the chimney is open wide it's the chimney that gets hot, and the oven gets cold.
Although we can not push the analogy too much it would be too long to describe everything about the exchangers ect ..

In our case the restriction, its main role is not to relax the exhaust gases and to have the maximum heat at the reactor inlet.
when the friction on the outside of the reactor I do not think that it changes much to the operation of the reactor, the heat with a torch and perpendicularly will do the same job.
What happens inside the reactor is not related to the outside, the outside only serves to bring a high temperature to the reactor.

A simple experiment on a small lawnmower engine at the exit of the cylinder head puts a length of 8cm in 3 / 8 pipe then regrossed in 1 / 2 pipe on a 20cm makes it work at full speed and observes the color of the conduits, only the small conduit becomes bluish red.
I'm not saying it's good to ride with a small duct certainly that if I insist the vent valve will burn
it's just for heat experience ..

Andre

[MichelM]

Hello André
If the start of the restriction is actually the hottest it may be as normal as the reactor rod is at the hottest point there. If I followed the findings with the color of the stem. The biggest "mystery" is the transformation of moist air between the stem and the heated tube: low space = high speed; heat and speed = electric discharge and transformation?
Michel

[phil 14]

Bonjour à tous
Some news on the 70 truck
no change since venturi
Level of the bubbler of a volume of 10 l maintained manually between 2 and 5 l
T ° average output reactor quite stable between 170 and 220 °.
3000 km traveled
always a significant power gain
stable water consumption 1.5 l / 100
drop in diesel consumption between 10 and 15% with maximum savings during hot weather ???
Purchase of a purge needle screw to install the steam outlet of the bubbler in order to try to reduce the water consumption as André advised me at the end of the harvest.
a+
phil 14

[Other]

Hello Phil

It is a wood valve (not needle), a small ball valve would do the trick too, the whole thing is to reduce the vapor output of the bubbler
A needle valve is small, I use a carburetor to control the flow.
On the bubbler it is a 3/8 conical wood drain valve, the opening varies from 50% to 75% depending on the engine load, if I pull a trailer I open more .. The water consumption is 0,5 to 08 liters of water per 100km, if I open the valve it exceeds 1,5 liters per 100km

Andre