Second piston controlled valving
Second piston controlled valving
(OP)
I saw a video of an engine on a motorcycle that used a piston in the cylinder head as the valving. Excellent torque.
Anyone know what I am refering to?
Thanks,
Ed
Anyone know what I am refering to?
Thanks,
Ed





RE: Second piston controlled valving
No progress has come to my attention since then.
Mike Halloran
Pembroke Pines, FL, USA
RE: Second piston controlled valving
There was a poster here named malbeare (?) that was working on just that type of engine. I believe he is an Aussie. I've exchanged a few emails with him and he seems to be a very personable fellow. I'm sure he would be happy to talk to you about his "six-stroke" engine if you can locate him.
http://en.wikipedia.org/wiki/Beare_Head
Good luck.
Terry
RE: Second piston controlled valving
RE: Second piston controlled valving
It was essentially a pipe bigger than the bore that was across the top of the bore. It had a plug in the middle of the pipe that separated the inlet and exhaust ends. it was at about a 45 deg angle to the axis and may have been shaped to streamline flow into the bore.
Each side of the divider had a hole the size of the bore and as the pipe rotated in the head, the intake and the exhaust side holes were exposed to the bore in sequence with the crank.
The seals between the pipe and the head were a problem as I recal from reports at the time.
Regards
Pat
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RE: Second piston controlled valving
RE: Second piston controlled valving
the drive of sliding valves was done, if I remember correctly by modifying the ratio of the camshaft from 1/2 to 1/1