Petrol Engines and things coming

[television]

Valeo have been developing a new engine with no running gear, that is no timing chain or camshafts.

The valves are operated by solenoids controlled by the engine ECU, this means that that valves are open longer and quicker allowing up to 7 injection per cycle. This is used in conjunction with new injection systems that run at 1700 bar, almost the same as diesels. At this pressure the fuel is atomized to its max. This used with generation 3 piezoelectric injectors where they fire under pressure as the piezo is right in the tip of the injector adding to the up to 7 injections per cycle.

The third thing is doing away with the manifold as we know it, there will be no vacuum at all,just like diesels and the special flaps will control the direction of the fuel. the normal ratio of air / fuel is 14:1 with this new system the flaps can change the ratio when cruising light throttle say 50 mph and upwards, the flaps can make the fuel air to sit right at the top of the bore, this will enable the car to run on a air / ratio of 40.1 as against the 14;1 that we use today.

Well this is all I can say for the time being,,I got this info from the last mechanEX held in London this week. I could not write it all down and the lecture was all on slides, and it is as near as I can remember. Any future updats I will post

 

[simon_wall69]

This does sound a little like a diesel engine running on petrol, almost. It will be interesting to find out whether there will be leap forwards in diesel technology also.

 

[dragon]

Any carbon based are definitely out, whether you like it or not.

It will be electric or hydrogen based.:mrgreen:

 

[television]

This does sound a little like a diesel engine running on petrol, almost. It will be interesting to find out whether there will be leap forwards in diesel technology also.

Hi Simon,, if you saw my post on diesels and the 2012 EU directive, what this does is to make the petrol engines so much cheaper to manufacture, and it is this development that could end the the diesel cars for they are getting increasingly expensive to manufacture.

It is the no running gear that is fascinating.

 

[Micman]

Hi Simon,, if you saw my post on diesels and the 2012 EU directive, what this does is to make the petrol engines so much cheaper to manufacture, and it is this development that could end the the diesel cars for they are getting increasingly expensive to manufacture.

It is the no running gear that is fascinating.

Hi, I read this with much interest.

Currently the government in proposing increased road tax bands dependant on a vehicles emisssions.

This in itself has already caused a great many motorists to ditch petrol cars and go for diesel as these have better mpg's and lower emissions.

Now there seems to be a threat that in only a few years time the diesel engine is going to be seriously under threat from the new EU directive!

What is the private motorist to do when changing their car - Diesel looks an attractive option to most, but now I'm not so sure!!!

 

[rf065]

Interesting technology, but it has to be proven to be reliable as well as cost effective before it becomes mass produced by every manufacturer.

I doubt we will be able to buy an engine like this for many years yet.

Russ

 

[bigyin1]

Interesting stuff.

Did anyone see the DiesOtto from Mercedes when it was proposed a wee while back?

Variable compression anyone?

http://en.wikipedia.org/wiki/DiesOtto

 

[madf]

If you think diesel engined cars are expensive to manufacture, hydrogen ones are much worse.

Liquid hydrogen has all the explosive properties of hydrogen gas and of course is so cold it will freeze anything it contacts. Handling it makes petrol look like water.

AND there is a major problem. Leave your car in a multi story car park for 2 weeks, If the park has not exploded when you come back - as gaseous hydrogen boils away and makes the park a large bomb waiting for a spark... your car will not start as the tank is empty.

Apart from that, a really practical idea.

 

[simon_wall69]

Hi Simon,, if you saw my post on diesels and the 2012 EU directive, what this does is to make the petrol engines so much cheaper to manufacture, and it is this development that could end the the diesel cars for they are getting increasingly expensive to manufacture.

It is the no running gear that is fascinating.

I have read it. Thank you for posting - it is very interesting. I don't think it will be the end of diesel fuel though, there will be ways around the pollution problem. People once said that diesel multivalve heads were impossible and I have an article from 1983 (I think) that says that diesel cars have no future and they are still around at the moment.

I also find that when the environmental impact of fuels is discussed, it only seems to be about the exhaust gasses of the vehicle and never includes such things as refining, etc,.

 

[Jay Gee]

I have also just read this,and can only echo the other comments about such a fascinating concept.I still have to work hard at visualising and understanding the flaps though.As far as the valve actuation is concerned-this seems to have the potential of the ultimate in VVT.Sorry if I'm stating the obvious.

 

[television]

I have also just read this,and can only echo the other comments about such a fascinating concept.I still have to work hard at visualising and understanding the flaps though.As far as the valve actuation is concerned-this seems to have the potential of the ultimate in VVT.Sorry if I'm stating the obvious.

Sorry I cant give more info on the flaps,,all I can say is that the flaps control how much fuel and where it goes. It was a lot to take in at the seminar.. more details will be around soon. the elimination of all of the rockers will bring the price down and the 40;1 fuel air ratio will get it through any emission controls, and it will be this, if it is the future that will kill off the diesels as there are no particles to think about.

A Pyrus stores 50kw of energy in the batteries, and far too early to say what will happen to them

 

[Mr Teddy Bear]

Hang on a minute a 40:1 fuel/ air ratio will destroy the catalaytic converter.
Lean burn technology was pioneered back in the eighties the Rover K series in it 1100 & 1400 cc guise, is a prime example.

This went to waste due to euro legislation requiring cat's surely?
The catalaytic converter technology requires a richer mixture to work the cat? [in comparison to lean burn]
I'm quite happy for any inaccuracies in this dit to be pointed out by the way.
Tim:-?

 

[television]

Hang on a minute a 40:1 fuel/ air ratio will destroy the catalaytic converter.
Lean burn technology was pioneered back in the eighties the Rover K series in it 1100 & 1400 cc guise, is a prime example.

This went to waste due to euro legislation requiring cat's surely?
The catalaytic converter technology requires a richer mixture to work the cat? [in comparison to lean burn]
I'm quite happy for any inaccuracies in this dit to be pointed out by the way.
Tim:-?

We did not get that far in the seminar, and it was not mentioned. Thanks for bringing it up, and I will look out for any updates

 

[Splatt]

No mention in this so far of any improvement in mpg figures. I assume the technology apart from improving CO2 emissions also has an economy payoff ?

 

[television]

No mention in this so far of any improvement in mpg figures. I assume the technology apart from improving CO2 emissions also has an economy payoff ?

If you are cruising on a 40;1 mixture, then the gains must be much higher than the present 14;1 ratio that is used today.

 

[keith100]

Valeo have been developing a new engine with no running gear.


Fresh from their success with transmissions with no running parts?:razz:

 

[television]

Valeo have been developing a new engine with no running gear.


Fresh from their success with transmissions with no running parts?:razz:

You would be surprised at the amount of gear that Valeo produce,,its a massive concern.

 

[keith100]

You would be surprised at the amount of gear that Valeo produce,,its a massive concern.

Just joshing a little, after reading about the valeo rads on this forum!