Ecoshell engine preparation

Tips, advice and tips to lower your consumption, processes or inventions as unconventional engines: the Stirling engine, for example. Patents improving combustion: water injection plasma treatment, ionization of the fuel or oxidizer.
ggdorm
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by ggdorm » 03/04/11, 21:42

Thank you very much FlyTox, I will opt more for the second solution concerning the cylinder and for the first solution concerning the flyweights! Unfortunately I don't have a UV lamp, I will look at the automotive campus tomorrow if I can find one, maybe in the body shop or electronics department (circuit printing)
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I Citro
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by I Citro » 04/04/11, 00:35

ggdorm wrote:... Unfortunately I don't have a UV lamp, I'll look at the automotive campus tomorrow if I can find one, maybe in the body shop or electronics department (circuit printing)
UV lamps are also used to detect tracer products (leak detection) on automobile air conditioning circuits ... : Idea:
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ggdorm
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by ggdorm » 13/04/11, 20:10

Hello everyone, I was away for a while because I was completely overwhelmed with work.
Indeed, I received the injection, the fuel, the engine return from the 3D scanning, ...

Here are some pictures of this injection:
Image

As of today, the engine is temporarily reassembled before further polishing and preparation work.
With the megaquirt 2 box connected to the circuit made, the injection pipe fitted and the box connected, it is time to check that the various sensors are working properly. And there is only one word, this case is hell for the neophyte. The use of the hall effect sensor requires the change of internal resistances as well as the bridging between different elements. The use of a single non-transistorized coil also. Calibrating the temperature sensor as a function of resistance is also a headache. Only the position of the butterfly is calibrated in two clicks (max and min). After two days of testing, I get a more or less correct speed signal, but doubly higher than the real one. If you do not have a coolant temperature sensor, it is still necessary to put a resistor on the cable provided for this purpose, otherwise the temperature varies constantly and leads to an unnecessary correction of the box.
Only a person who knows English and knows how to magnify a soldering iron with access to this box. All information can be found on a single site: www.msextra.com

I opted for the use of TunerStudio MS software by which the box is more easily recognized by the computer. This software allows the ignition and injection mapping to be carried out as well as the adjustment of all the parameters and the visualization of all the sensor results.

Everything works more or less at the level of the sensors and the injection except for the ignition always given by the original magnetic flywheel (one difficulty at a time). So it's time to try the engine.

Having not yet received all of the parts necessary for the electric start, we have affixed the speed sensor to the engine blank so that it takes the impulses through the magnet of the ignition coil. The pressurization system does not leak and it is set to 2.4 bar injector pressure. Nickel.

Let's start with the essence first. With the upgrade done, it's time to fire the launcher. Surprise, the motor hiccups! A few adjustments later, in particular with regard to the engine opening time and the engine hums slowly. We take this opportunity to take control of the program as well as to detect anomalies.

The contents of one SP98 syringe emptied, we decide to fill the bioethanol tank. To start, we leave the identical injector opening time which will be noted later. The challenge is therefore partially successful, the engine runs on bioethanol. A high consumption is nevertheless noted due to the bad settings present. We will carry out the mapping with a lambda probe as soon as possible!

Here is a quick video of how the bioethanol engine works! Be forgiving, it's his first rounds:

http://www.youtube.com/watch?v=yQ6azoxS6Cw
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AXEAU
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by AXEAU » 28/04/11, 22:51

Hello,

More than a month, does it turn out better?

jlg
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ggdorm
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by ggdorm » 28/04/11, 22:58

Hello,
To tell the truth, we encountered a lot of problems with the case, the most important of which is the ignition ... I made modifications on Tuesday, in particular by changing an ignition transistor taking three times the amperage. .. Tomorrow I will try to see if I have a spark and if it is the case, I will start mapping.
I spent the last two days editing and testing the hunt with the team to see the points to correct. I think we have a good solution here!

Good evening, I will keep you posted.

Jérôme
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ggdorm
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by ggdorm » 15/05/11, 15:01

Hello everyone, all the problems with the megasquirt are now solved!

I use tunerstudio ms to program our electronic unit. We also bought the full version of the program (VE ANALYZE) which automatically performs the mapping by referring to a lambda table depending on the speed and the throttle position. This is an absolutely great program that would allow you to map a car while driving! Be careful however to put it too rich at the start so that the program should not increase but decrease the table and thus preserve the engine!

Following the rapid power test, we see an increase in power of 0.3 hp on our engine of one hp in petrol and + - 80 watt with bioethanol for consumption identical to petrol.

The race is now in a few days and our engine is running terribly well (13 laps, a lot of nervousness) but cold starts are not ideal with bioethanol ... I therefore have to finish the free exhaust, mounted the new high compression rod on Wednesday (the teacher folded the first one I received) and solve the problem of cold start by programming the box! The reliability of the system is now extremely satisfactory.

On our site: team-ecomotion.com you can see the test bench produced as well as the quantity of material around the engine ...

We have already tested the chassi with the GX 25 without the injection on it, the acceleration times are a little too long. So we ordered a bigger sprocket and hope that the power gain will be interesting!
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ggdorm
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Registration: 23/02/09, 17:25
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by ggdorm » 01/06/11, 15:00

Hello everyone,

Here is the result of the ecoshell:

100% reliable engine and proto which allowed us to carry out 5 tests of 25 km without any glitch. We recorded a consumption decreasing enormously between each tests.

Here are our results:

Attempt Result (km / l)
1 240
2 311
3 415
4 415
5 445

Attempt Result (g / km): CO
1 7.719
2 5.952
3 4.467
4 4.467
5 4.16

A lot of work remains to be done but ideas are popping up everywhere! Strongly Rebecq on July 2 and 3!
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wampyr32
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by wampyr32 » 01/06/11, 23:11

Hi,
the evaporation of ethanol absorbs a considerable amount of heat and thereby decreases the temperature of the hot spring and therefore the efficiency of the engine.
Wouldn't it be wise to use the heat from the exhaust to achieve this vaporization?
Basically, place the injector at the entrance of a Pantone?

Then, to benefit from a better filling rate, use a long intake manifold ending in a cone to generate compression by the inertia of the air column?

It might also have been easier to make your own injection controller, see the DIY EFI project.
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ggdorm
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by ggdorm » 01/06/11, 23:19

In fact, we have an injection box that works thunder once the small glitch settled and really no time over 4 months to prepare the engine, to do the tests and moreover to create my own injection box. ..
Regarding spraying before the injector, this is contrary to the increase in yield. A problem of bioethanol is already the Vapor Lock, heating it to more than 20 ° before it enters the engine is not for me the best solution ... In addition, the technical control is extremely strict, a pipe fuel passing near the exhaust pipe will be directly rejected!
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wampyr32
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by wampyr32 » 02/06/11, 00:50

ggdorm wrote:Regarding spraying before the injector, this is contrary to the increase in yield.


Yes, but you would have to admit a constant mass of the mixture to compensate for this.
I don't know if a Comprex (pressure wave compressor) would work on such a small scale.

Image

Or use the supercritical injection, see http://www.tscombustion.com/tscitechnology.html
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