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.
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I Citro
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by I Citro » 20/03/11, 23:55

ggdorm wrote:... How will the oil be recovered? Via a simple pipe in the lower engine and an evacuation by pressure / gravity with a tank placed under it?
Why not. :?:
Imagination in power, make it simple and light. :P
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ggdorm
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by ggdorm » 21/03/11, 00:11

I have just re-read the 2008 regulation on the recycling of exhaust gases and I find this:
Likewise, the air intake ducts will have no fuel reserves.
or “blowby” gas * when the vehicle is on the starting line before
start-up. The recycling of blowby gases during the race is prohibited.

Article 67: Supplementary energy
For all energy classes, accumulated electrical or pneumatic energy, not
replaced during the competition by the engine or by the fuel cell, cannot
only be used for automatic start-up, for the ignition system,
the injector and the circuits of measuring and control instruments. Energy for
mechanical injection systems must be supplied by the engine. For any other
use, authorization must be requested in writing from the Organization.
Supplementary energies (chemical, latent state change, etc.) are prohibited.
If the engine temperature is regulated, this can only be done using water
pure as heat transfer fluid and this water circuit must not be under pressure. The
external motor control temperature must be limited to 100 consecutively
° C (for motors fitted with these devices).
It is prohibited to use an electric pump powered continuously by a battery to
the circulation of oil and water in the engine. The use of such a pump is
however tolerated if it operates exclusively during the start-up phase,
engine disengaged. If it is to be used during normal engine operation, its
operation must be powered by the motor (mechanical transmission).

Article 60: Exhaust
Exhaust gases must be removed from the vehicle.
The exhaust pipes must in no case exceed the rear point of the
body. Technical inspectors will require a modification, see disassembly,
if the equipment is deemed dangerous for the safety of other competitors. Their
decision will be sovereign.


I understand that recycling exhaust gases to pressurize an oil system would be allowed? It would then be possible to carry out an external oil bath ...
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AXEAU
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by AXEAU » 21/03/11, 00:17

I think I did not understand everything, can you confirm the vertical position of the cylinder and the belt of distri that bathes in oil?
If this is the case make it simple, put the minimum oil so that the bubbling sends enough to lubricate the high engine.
Seeing the shape of the lower housing we can already say that it is a dry housing at the level of the crankshaft.
jlg
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ggdorm
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by ggdorm » 21/03/11, 00:21

Indeed, vertical cylinder with the belt passing through the oil. The oil would rise along it in the teeth. In the protective casing of the belt, there is a small conduit bringing the oil to the valve ... There are also the two spoons bubbling inside.
I think the oil level is done with 80 ml ...
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AXEAU
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by AXEAU » 21/03/11, 00:39

Well, on that side you will not win much.
On the side of the distribution diagram I saw only one cam which actuates the two rockers and there too you are limited. If you want to vary a value independently of the others it will be necessary to play on the shape of the rocker at the level of the support on the cam so that it attacks it and leaves it sooner or later.

jlg
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ggdorm
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by ggdorm » 21/03/11, 10:21

Indeed, the engine is composed of a cam and two rocker arms. I would leave this improvement for years to come.

The problem with the E100 is that below 14 ° C, starting is difficult. So I was thinking of passing the supply pipe a few spirals around the exhaust. I will calculate this number of spirals in thermodynamics. In order to make it undergo a heating. The problem I fear is the creation of Vapor Lock in the injection giving rise to difficult starts. What do you advise me on this level?
The temperature would be ideal during use but it may fall during engine downtime
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AXEAU
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by AXEAU » 21/03/11, 21:30

Hello,

You need a stable temperature for your fuel supply and the ech tube. will vary too much. There may be more stability against the cylinder head or under the oil pan.
I saw the small video presentation of the circuit, there does not seem to be any difference in level and in this case I think that a continuous operation of the engine is better.
Do you have any info on that?

jlg
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ggdorm
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by ggdorm » 21/03/11, 21:54

Hello,

Indeed, the circuit is very flat. The aim of the race is to obtain an average speed of 30 km / h. An engineer develops a racing strategy for us. I do not know the precise values ​​but it would be full acceleration (full load for efficiency) up to 45 km / h (value not fair) then engine shutdown until 20 km / h and recovery. All more precisely following the passage to the engine test bench ...
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AXEAU
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by AXEAU » 21/03/11, 23:22

Instinctively, after going to the bench to find the best torque or efficiency, I will have calculated the transmission for the speed of 30 to 35 km / h.
Try to see at the bench in which speed range we have the best performance, if it is very small you will not be able to have an amplitude of 25 km / h.
The strategy in the race will be to keep the speed constant with small corrections depending on the elevation (a little higher on the descent and gradual deceleration in false flat uphill).
If you have time try both methods.


jlg
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ggdorm
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by ggdorm » 21/03/11, 23:29

We have designed a modeling program for the race strategy which will be finalized after going to the bench ...
The best specific consumption of an engine is at full load, ie the throttle fully open. This does not mean the lowest consumption.
For my part, there is not too much advantage in running an engine at full speed at 30 km / h for the entire duration of the race when we could run this engine at full speed for 20 seconds, and coasting double engine shut off. What usually does for the prototypes in races 40 start in all is 15 minutes engine for + - 45 minutes of races
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