Jay-zs+

Hello all,

I don't own a ford myself well not a running one anyway, got a mk1 escort cabriolet that will one day be restored but thats another story.

I am currently studying a masters in mechanical engineering and for my dissertation I'm aiming to design some sort of system that does away with cams although.

Which brings me to why I'm here... Ive picked up a zetec SE 1.6 cylinder head to use as test bed for the concept. Went for it as it was dirt cheap and figured being a ford there would be loads of information relating to the engine.

However I'm struggling to find real technical details. Got the basics such as bore, stroke and power figures but cant seem to find any real indepth values for the valve train ie cam timing, clearance volumes as well as dimensions of conrods and crank. Basically I going to mathematically/CAD model the current system so that I can then experiment with various different valve lifts and durations for a number of different driving conditions.

Just wondered if anyone knew of any good links or pdfs of technical specs. Would be much appreciated.

Turbo Zetec

iTrader: (1)

Unfortunately i cannot help with your figures, but guessing you're after making a rotary valve engine? Never seen one in action, but have read about them. they seem an awesome idea in theory

only a guess mind

YOREVOL

i read that solenoid operated valves would be the next major leap forward in combustion engine technology. iirc it was 10-15 years ago, still waiting for it to happen.

Jay-zs+

No going to keep the poppet valves, have looked into rotary valves but decided to go with a system that could be fitted to a near standard cylinder head as makes pro-typing easier, and the poppet valves themselves work well its mainly the fixed cams that let them down due to lack of variation.

Yer there are a number of ways it could be done, there have been research engines build that use some form of electro-hydraulic, eletro-pneumatic, electro-magnetic or mechanical system. Think the main reason that its not been put into production model is due to the cost and complexity of the systems.

Still not certain which form I will pursue will depend on testing I reckon. Although I'm swayed towards the electro-magnetic and will be faster acting than hydraulic actuators. In the mean time got to model the standard system so I know the forces involved in the standard lift profile giving me an idea of what to aim at.

xr2wishy

iTrader: (2)

Isn't the fiat 500 in a form running solenoid operated valves?
The system is out there, i suspect high powered solenoids aren't cheap, but they wouldn't need to be too strong on a n/a engine.
Turbo's would need a redesign or upgrade no doubt.

Jay-zs+

Yer the Fiat 500 and some alfas run a system that they called multiair, works but using a mechanical linkage from the camshaft through a hydraulic cylinder that by varying the pressure can control the lift of the valves. Its a clever system does away with a throttle valve as well which helps reduce pumping losses. Theres a good video here explaining the principle. There are a few companies that have put various variations into production although most still require a camshaft, Id like to design a system that has no cams at all and is all electronically controlled. Its something that many manufactures are very interested in developing, part the reason I chose it.

fezzielove

If changing your base model to a 1.8 blacktop zetec is an then I have everything you need from blueprints cad models, optimised gt-power simulations, the fiat multiair engine still utilises a camshaft to control cam timing so not really feasible. Have you looked into rotary pulse supercharger as a means of loosing the valves? Let us know how you get along as I am working on a similar concept.

Jay-zs+

Well I only paid Ł10.50 for the cylinder head so there's nothing holding me to the 1.6 lol. If you have details on the 1.8 then that would be a HUGE help!

Not looked a rotary pulse supercharger will look into it, writing up some of my research today so will add a chapter in for it.

What is it your working on if you dont mind me asking?

fezzielove

Ill send some stuff across what's your email, I'm designing a revised eco boost engine without valve springs with a very high limiter lol I also have run some cfd simulations on the zetec ports that may also be of interest to you if you have the software to view them?

Jay-zs+

Sounds interesting! Guess no risk of valve bounce with high rmp if you have no springs! Will Pm you my email, thanks for this will be a great help.

I have Ansys CFD package installed so can open and run cfd analysis.