MCE-5, the VCR-i engine mounted in a Peugeot 407

[Woodcutter]

Bonjour Christophe

I think there is at least one VERY good reason for not having chosen the floating breech version for the MCE: starting with thesealing no?

So that the distribution can operate with height changes, without making an incredible machinery, this seems to condemn to make orders of electromagnetic or electropneumatic valves.
A+

Yes, this is true if we start from the principle that the general shape of the combustion chamber should not be modified.

[Christophe]

I just checked the costs announced (from 9:00 on the video):

- they speak at additional cost in the most unfavorable case (it is the additional cost compared to a classic 4L therefore?): + 500 €

- replacing a V6 with the same performance: the MCE5 saves - € 800.

- compared to a diesel engine: -2000 € (which would mean that the diesel are 1200 € more expensive than the V6 ???)

- compared to a hybrid: - € 5000

I presume that these are public price costs because 2000 € is the order of magnitude of the price difference between a gasoline and an equivalent diesel ...

[Christophe]

regular oil change, very good oil, crankshaft and camshaft bearings to be changed regularly, etc.

For oil change: my 1994 VFR = every 12 km. At the time I don't think the cars were doing any better. Todays I don't know for motorcycles but for cars it has improved drastically: the 000 or 20 km of oil change appeared at the very end of the 30s, right? Now is it really good since the life of the engines does not seem to really improve ...

Jaimais heard that it was necessary to change "periodically" the bearings or camshafts on a motorcycle (I have yet the ETAI maintenance manual of my vfr and my ex diversion) ...

Maybe you were racing with your bike?

After obviously a motorbike wears out completely differently depending on the rider ...

The main problem, in my opinion, of powerful atmospheric engines lies in the stratospheric rotation regimes. Not sure if this type of feature is compatible with a long service life ...

It depends on the driver: no need to try the 10 rpm all the time ...

Small test: make the ration "medium speed / red zone mode" for a car and a motorcycle.

With a guy who drives like an idiot in a car, this ratio is likely to be higher than the fiftieth on his motorcycle ...

The fact is that there are on average: more idiots on a motorcycle wringing (so I lean ... I wipe ... the handle) than in a car that leans ...

This is also where one of the advantages of the MCE-5 resides: really low rotation speeds, a bit like a diesel ...

Are modern diesel engines still as reliable as those of the 80s? It's not just the engine speed ... that wears out the engine ...

[Woodcutter]

[...] Perhaps you were racing with your bike?

Yes.

[...] It depends on the pilot: no need to try the 10 rpm all the time ...

Well ... on a 600 which spits 120 hp at 14 rpm, I don't see how you can use it without pulling a bit in it, right?

[...]

This is also where one of the advantages of the MCE-5 resides: really low rotation speeds, a bit like a diesel ...

Are modern diesel engines still as reliable as those of the 80s? It's not just the engine speed ... that wears out the engine ...

No, not only, but it is a big part of it.

[fabio.gel]

Yeah still a cochonerie engine with lots of oil, belt, candle ... and recycling in all this video do not talk !!!

Ok proposed better

The efficiency of an electric motor is much better.
I would lean more towards the association steam turbine + alternator + electric motor.
The turbine being heated with wood.

I know that for the moment the turbine does not have a terrible output but at least no complicated system, no oil or other stupidity (eg ethanol), water, wood, pressure, all well studied by a BE and roll my hen.

For me I would lean more towards this ecological solution.

[I Citro]

In fact, you are reinventing the steam locomotive for us ...
We already talked about forum of the very efficient model 242 A 1

[fabio.gel]

: arrow: In fact, you are reinventing the steam locomotive for us ...
We already talked about forum of the very efficient model 242 A 1

Indeed, but I still think that it is better to sink money into steam than into oil

[I Citro]

In fact putting a steam engine in our homes would be very convenient.
We would take advantage of cogeneration to produce:
- electricity
- heat (heating, water heater)
- steam: for cooking, washing, washing dishes, cleaning floors and windows, weeding, the sauna ...

[RIAZ]

Indeed, but I still think that it is better to sink money into steam than into oil

Finally ....!

Apart from Iceland and a few rare places on the planet, steam must be produced. Comparing steam and oil is like comparing drunkenness and whiskey!

To use the steam expansion in a turbine, you must first have heated water.
Heating with wood, why not, but today and for a long time still steam is massively produced with coal, oil and gas.

But whether you go through steam or something else, to produce mechanical energy from thermal energy, you should refrain from doing so without using the "lost" thermal energy (about 2/3 ) to serve a heating need. It is cogeneration.

On a vehicle this possibility is very limited (a small fraction and in winter only for heating).

Using a steam engine on a vehicle runs the risk of coming up against the means to be implemented in order to have a good efficiency (high temperature boiler and condenser) which are heavy, bulky and expensive.

This good old combustion engine still has a lot of playing cards to play, especially if it is upgraded as in the case of the MCE-5. If we reached 40% efficiency, it would be difficult if not impossible to do as well with an electrical industry, even with an electric motor (which is only one of the links in the chain) having an efficiency of 95%.

[RIAZ]

: arrow: In fact putting a steam engine in our homes would be very practical.
We would take advantage of cogeneration to produce:
- electricity
- heat (heating, water heater)
- steam: for cooking, washing, washing dishes, cleaning floors and windows, weeding, the sauna ...

Perhaps it would be better to use a STIRLING engine ...?