solenoid actuated valves
solenoid actuated valves
(OP)
What is the viability of actuating the intake/exhaust valves of an engine using solenoid valves. If it were possible, it would allow displacement on demand, true VVT, and a mechanical energy loss advantage.





RE: solenoid actuated valves
RE: solenoid actuated valves
There are also a lot of people working on hydraulic opening of valves, using high speed solenoids to control the hydraulic oil.
RE: solenoid actuated valves
RE: solenoid actuated valves
They don't go particularly fast, but they are full authority valves, that is, you can program their instantaneous speed and displacement exactly.
www.just-auto.com/proactive/ pdf/Lotus-proActive-issue-4.pdf
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: solenoid actuated valves
RE: solenoid actuated valves
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: solenoid actuated valves
Cadillac had the 8-6-4 in 1981, an idea ahead of its time.
Look to this link to see what GM has on the table now.
http://ww
I don't know if you are theorizing, trying to build, or just curious.
Whichever, just do a search- Cadillac 8-6-4 2400 hits.
Cheers,
George
RE: solenoid actuated valves
RE: solenoid actuated valves
RE: solenoid actuated valves
RE: solenoid actuated valves
(Why/when/where were Lucas dabbling in valve gear though? FIE, electrical systems and brakes were their mainstay when I worked for them.)
RE: solenoid actuated valves
RE: solenoid actuated valves
Who were you working for at Lucas, was it BGB? If you get a copy of SAE Paper 880602, you will find that at the time you were working in west London there were other people at the same site, working on an integrated camless valvetrain and common rail fuel injection system. Very advanced for it's time, but simplified versions of this will appear in the future, I am convinced.
PJGD
RE: solenoid actuated valves
I was a sponsored student, doing the rounds of the engineering departments at Acton. At that time Next Big Thing was going to be the EUI, driven off the camshaft. I first saw EUIs when I was working in the engine & pump test department. The names I remember are Robert Bell, George Dryja.
RE: solenoid actuated valves
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RE: solenoid actuated valves
Just seems to me to be a simpler method.
RE: solenoid actuated valves
At higher speeds, the valves would need to be fast and allow very high instantaneous flow rates, which would take a pretty high powered solenoid.
The dynamics could also get interesting because the bulk modulus of the hydraulic fluid cannot be ignored above a few Hz.
Mike Halloran
Pembroke Pines, FL, USA
RE: solenoid actuated valves
Jonathan T. Schmidt
http://www.schmidtmotorworks.com
RE: solenoid actuated valves
The hydraulic lines were about 3/8" ID. The powerpack was the size of a fridge.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: solenoid actuated valves
http:
RE: solenoid actuated valves