Wassereinspritzung beim TDI | Posts 32+

Hi,

It's obvious that it runs better with ethanol or methanol than with water. After all, these fuels burn with an excess of air and produce additional power. In model making, there's even fuel available for these engines that contains nitromethane. That should be a lot of fun .

Regards,

Eike.

But could someone explain how it works in a diesel engine?
The engine is designed to function with a high compression ratio. In addition, it has a turbocharger that provides a boost pressure of over 1 bar. You really have to hit that thing hard.
Perhaps Soave can email me a photo for better understanding.

'First of all, thank you everyone for the tips!'
So far, I've only been using water, and I haven't noticed any difference.
However, I haven't dared to try it with denatured alcohol or methanol (which is difficult to obtain) yet. I'm afraid that using denatured alcohol might damage my engine! But tomorrow, I'll gather the courage and try running it on denatured alcohol, let's see what happens! I can also provide photos if you like, and I'll use a stopwatch to measure the results! With and without alcohol!!

Tagessuppe wrote:

But someone, please explain to me how it works with a diesel engine. The engine is designed to function with a high compression ratio. In addition, it has a turbocharger that provides a boost pressure of over 1 bar. You really have to hit that thing hard. But maybe Soave can email me a photo for better understanding.

1. Methanol, as I recall from my model-building days, has a very high octane rating. Ethanol is probably similar. It's the exact opposite of diesel fuel.
2. It's highly unlikely that a large amount of fuel will be injected, creating an extremely lean mixture that is reluctant to ignite on its own. This mixture is also less prone to knocking and will only combust when ignited by the diesel fuel.
Christian

Hello again.



...sorry, did I miss something? (Am I supposed to send a photo?)

What's the point? All you see is a water pipe disappearing into the intake manifold. I've put the pump next to the wiper motor. So, you can only see them after removing the windshield wipers, including the cover.

However, despite that. I'd be happy to take a picture. I won't be able to do that until the weekend, though.

Best regards.

mild, gentle, soft, sweet

I can't quite imagine how or why someone would inject a water-ethanol mixture *before* the turbo, just to gain a little more power or torque. I just picture the turbo spinning at 290,000 RPM and hitting the water at supersonic speeds. Just add a little more detergent, and the dishwasher will always be clean.
I would probably install a better chip or a larger LLK (likely referring to a liquid cooling system). I think it's more effective, and your water/ethanol calculation isn't that high.

CU, soup.

@tagessuppe:
Please read everything carefully!
THE INJECTION OCCURS AFTER THE TURBOCHARGER!
DO NOT SAY ANYTHING BEFORE! THAT WOULDN'T MAKE ANY SENSE!

I installed an LDA, and since I connected the charge pressure hose to a display using a T-connector (which is required for the WAES pressure sensor), I've been experiencing...
It now only displays a maximum pressure of 0.5 bar! Is that because of the T-piece???

GOLFTDI wrote:

@tagessuppe: I installed an LDA, and since I connected the charge pressure hose to a display using a T-connector (which is required for the WAES pressure sensor), I've been experiencing... It now only displays a maximum pressure of 0.5 bar! Is that because of the T-piece???

The T-fitting does not absorb any pressure. Either there's a leak somewhere, or you accidentally unplugged something else during the installation. 0.5 bar is the pressure range where engines with turbocharger control via overboost will operate if the solenoid valve is no longer closing.

eike wrote:

Hi, I myself once experimented with water injection on a production-model TDI engine. However, it didn't work because I lacked a pump to inject the water into the intake manifold. So, I did it before the turbocharger.

@Golftdi

1. Nobody is talking to you.

2. Glasses? Vielmann!

Hi,
As far as I know, every WAES vehicle injects something after the loader.
It wouldn't make any sense to do it beforehand!
'Also, this kind of charger operates at 200,000 RPM!'
The loader would highly compress the alcohol-water mixture.
and I don't know if that's healthy!

Hi,
As far as I know, every WAES vehicle injects something after the loader.
It wouldn't make any sense to do it beforehand!
'Also, this kind of charger operates at 200,000 RPM!'
The loader would highly compress the alcohol-water mixture.
and I don't know if that's healthy!

Hi,

I don't entirely agree that it makes no sense. I injected the fuel before the turbo, or rather, I allowed it to be drawn in before the turbo, because I didn't have a suitable pump to inject the fuel after the turbo.

The presumed meaning:
The water absorbs the temperature where it is generated: in the turbo.

The Turbo:
'Sure, it spins extremely fast, but it's not handling large volumes of water. Instead, the air being drawn in contains varying amounts of water droplets. When these droplets hit the turbine blades, they are subjected to centrifugal force and likely exit the turbine as a fine mist or something similar.' A portion of the heat generated in the charger through compression and friction will heat the water and likely cause it to evaporate, either partially or completely.
Most likely, the water is slightly hindering the turbocharger's performance. However, the VTG regulation should compensate for that.

Since liquids cannot be compressed, the supercharger cannot compress a mixture of water and ethanol either.

Unfortunately, I don't have a working OBD adapter yet. If I did, I would log the intercooler temperature and then let water flow into the intake before the turbo. Then we'll see if it makes a difference.
Perhaps this can be tested by installing a soaking wet air filter and then driving around to see what happens.

Regards,
Eike.

eike wrote:

I don't entirely agree that it makes no sense. I injected the fuel before the turbo, or rather, I allowed it to be drawn in before the turbo, because I didn't have a suitable pump to inject the fuel after the turbo. The presumed meaning: The water absorbs the temperature where it is generated: in the turbo. The Turbo: "Sure, it spins extremely fast, but it's not handling large volumes of water. Instead, the air being drawn in contains varying amounts of water droplets. When these droplets hit the turbine blades, they are subjected to centrifugal force and likely exit the turbine as a fine mist or something similar." A portion of the heat generated in the charger through compression and friction will heat the water and likely cause it to evaporate, either partially or completely. Most likely, the water is slightly hindering the turbocharger's performance. However, the VTG regulation should compensate for that. Since liquids cannot be compressed, the supercharger cannot compress a mixture of water and ethanol either. Unfortunately, I don't have a working OBD adapter yet. If I did, I would log the intercooler temperature and then let water flow into the intake before the turbo. Then we'll see if it makes a difference. Perhaps this can be tested by installing a soaking wet air filter and then driving around to see what happens. Regards, Eike

*rooofflll* Soaking wet air filter!!!! gngngngn!

"It absorbs heat where it's generated." It kind of sounds like "tampon" to me.

Sorry Eike, but do you really believe all of that yourself?
[/quote]

*rooofflll* Soaking wet air filter!!!! gngngngn!

'It absorbs heat where it's generated.' It kind of sounds like 'tampon' to me.

Sorry Eike, but do you really believe all of that yourself?
[/quote]

Hi,

Do you have any actual arguments, or just advertising slogans? The idea of using a wet air filter might not be great, but it's not meant to be a perfect solution, rather a starting point for an interesting discussion.
Even if the result is something like what happened with the textile air fresheners...

Regards,

Eike.

eike wrote:

Do you have any actual arguments, or just advertising slogans? The idea of using a wet air filter might not be great, but it's not meant to be a perfect solution, rather a starting point for an interesting discussion. Even if the result is something like what happened with the textile air fresheners... Regards, Eike

Okay, I'll try. 1. At speeds exceeding the speed of sound, water becomes like concrete. You're doing the Turbo perfectly.
2. Wet air filter? The mass airflow sensor (MAF) won't like that. The main component of the MAF is a membrane that gets very hot and is very sensitive to water. But it only costs 250 euros anyway.
The more air is compressed, the lower its ability to absorb water. At an intercooler temperature of approximately 50°C.
Forget about it evaporating. Furthermore, water injection is only effective if the water evaporates within the combustion chamber during the explosion.
4. Is your "water injection" system speed-controlled?
If not, the water accumulates and then suddenly sprays out when you accelerate.

Please don't be angry with me; I don't mean to take anything personally.
But I don't really like shortcuts or quick fixes, because they're not done properly.
causes, apart from engine damage.

Best regards.

Hello everyone!

I've now ordered the WAES and have a few questions about it.

I want to install the pump behind the fuel wall, next to the windshield wiper, on my Golf III.
Are there any areas I should definitely avoid when trying to attach the pump using metal screws?
(including concealed cables, hoses, etc.)

Can the pump run dry if there is no more water in the system?
Or perhaps it turns itself off?
She's located at a relatively high point, so if the tank is empty, it would first need to draw in air.
Ideally, it would be best to install the pump below the reservoir, as this would reduce the suction load on it. However, this would require a relatively verschandeln space and a long run for the pressure hose.

What are some inexpensive ways to display the water level or fill line, and/or to control a pump?
Whether it's an original model, accessories, or an electric kit.
I would like to install a small coolant reservoir as high and close as possible to the pump, and activate a wash water pump when a certain fill level is reached, which will then refill the reservoir from a larger container.

That's all there is to my plan...
If you can give me some tips, thank you very much!

Regards,
Michael.

Sure, here are a few quotes from:

'The best way to predict the future is to create it.' - Peter Drucker

'The only way to do great work is to love what you do.' - Steve Jobs

'The only limit to our realization of tomorrow will be our doubts of today.' - Franklin D. Roosevelt

'The future belongs to those who believe in the beauty of their dreams.' - Eleanor Roosevelt

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only thing that is constant is change.' - Heraclitus

'The only
Please provide the text you would like me to translate from German to English.
Experimental investigation of the influence.
layered water injection
regarding the operational behavior of a...
direct injection diesel engine,
especially in light of the fact that...
the formation of NOx and soot.
Prof. Dr.-Ing. Ch. Simon, Dipl.-Ing. (FH) Rainer Pauls.
University of Applied Sciences Trier.




The introduction of water into the combustion chamber.
during the combustion process, a transformation occurred.
from a conventional injector to a two-
Fuel injector design (Figure 5).
The water flows through the nozzle holder.
directed to the nozzle body. Please provide the text you would like me to translate from German to English. I need the text to be able to provide a translation.
Groove at the end of the nozzle needle, fitted with a ring.
Through corresponding cross-drilled holes, it enters the...
'a hollow-drilled nozzle needle and passes through it.'
integrated into the tip of the nozzle needle.
Horizontal drilling operations have been suspended.
The period between two injections.
Water is pushing upwards above the lower transverse boreholes.
returns the fuel to the diesel injection pump.
The fuel below the lower transverse holes cannot...
avoiding it and therefore remaining as a leading fuel quantity.
at the nozzle tip.
The amount of fuel delivered upstream is determined by the vertical...
Location of the lower lateral boreholes determined.
During the next injection process, the entire package will be...
'Fuel-water-fuel' injected into a combustion chamber.
injected.
The fuel is supplied by a conventional axial distributor injection pump.
VP 37 from the company. Bosch provided funding for the injector nozzle.
The water supply system used here...
it is a purely mechanical system, in which a conventional...
Diesel fuel injection pump component for water pumping.
is used.
The water injection pump element (Figure 6) is responsible for supplying water to the injection nozzle between injection cycles.
The pump element is actuated by a camshaft, which in turn is driven by a...
The timing belt is driven directly by the engine.
A significant disadvantage of this system lies in the fixed cam geometry, which...
The current design allows for no variations in the water injection process.
The flow rate of the pump element is adjusted using a micrometer screw.
which is connected to the control rod of the pump element. To minimize the game.
The control rod, in turn, is spring-loaded.




Summary.
The article describes that even in engines with low power and small...
In structural dimensions where stratified water injection can be used, and to...
good results in terms of NOx reduction and, in some cases, also a significant...
Reducing soot emissions.
The comparison between the smoke number (FSN) and exhaust opacity reveals that there is a relationship between the...
While both measured values are expected to have a direct correlation, this is observed with water injection.
However, slightly elevated turbidity values may occur.
The specific fuel consumption and performance characteristics of the engine remain.
the water injection system remained largely unaffected, although there was a noticeable increase in the...
Ignition delays can be observed in stratified operation.
Compared to various nozzle geometries, it has been shown that the one used here...
A 12-hole injector without water injection has a higher soot concentration compared to a 5-hole injector.
Observing a swirl jet results in significantly lower NOx concentrations.
Values are being measured. The higher soot concentration can be caused by the water injection.
be fully compensated.
Optimization measures, especially regarding the water injection process, allow...
We expect further efficiency improvements from the staged water injection process.
1. Introduction.
The direct injection diesel engine achieves specific fuel consumption rates in the...
With a specific fuel consumption of approximately 200 g/kWh, it represents one of the most economical thermal power machines.
With relatively low hydrocarbon and carbon monoxide emissions, the...
However, the formation of soot and nitrogen oxides is considered to be extremely problematic. This issue.
It primarily results from the fact that soot and nitrogen oxide formation are inversely related.
behavior, meaning a decrease in the concentration of nitrogen oxides, is observed under typical combustion conditions.
typically associated with an increase in soot emissions, and vice versa.
(Soot-NOx trade-off).
While soot formation is primarily caused by incomplete combustion due to a...
is attributed to local oxygen deficiency, with the various subprocesses of the...
However, the formation of soot, which is still not fully understood [Bou-02], is related to the formation of nitrogen oxides.
relatively well known.
Stick oxides, commonly referred to as NOx, are formed during combustion through...
different process flows.
Thermal nitrogen monoxide accounts for approximately 90 to 95% of the total.
NO is enhanced at temperatures above 2000 K, particularly in the burned portion of the working fluid.
formed [Mer-99]. Nitrogen dioxide (NO2), on the other hand, is present in only about 5 to 8%.
involved in the overall formation of nitric oxide.
In addition to exhaust gas recirculation, which is an efficient internal engine measure for...
While reducing NOx formation typically involves an increase in soot emissions [Mat-99], water injection fundamentally offers the possibility of reducing both NOx emissions and soot concentration ([Eic-96], [Rau-96], [Tak-98]). Recent studies on NOx reduction through water injection are also presented in [Bir-01] and [Hag-02]. However, no statements are made here.
It investigated the influence on soot formation. In [Hag-02], it is only noted that there is no deterioration regarding soot formation.
As a promising method for simultaneously reducing nitrogen oxides and...
Layered water injection [Tak-98] appears to reduce particulate matter in the exhaust of diesel engines. This refers to the deliberate separation of fuel and water within the fuel injection stream.
The results presented below are the result of the research project described in Section 4.



CU Gremlin.