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From: jlw@ariel.UUCP (J.WOOD)
Newsgroups: net.auto
Subject: Re: Camless valve operation
Message-ID: <821@ariel.UUCP>
Date: Wed, 9-Jan-85 12:31:29 EST
Article-I.D.: ariel.821
Posted: Wed Jan  9 12:31:29 1985
Date-Received: Fri, 11-Jan-85 22:48:32 EST
References: <6848@watdaisy.UUCP>
Distribution: net
Organization: AT&T-ISL, Holmdel, NJ
Lines: 20

A much better approach would be to use an engine type that doesn't
require poppet valves.  I would suggest that rotary valves could be
used.  Still better than this would be to use an engine type that does
not require valves at all, the rotary.  On Mazda street engines the
primary intake is through the side plates of rotor housings.  Like a two
cycle engine the 'valve' timing is determined by the shape, size, and
placement of this hole.  Going to a wilder cam in these engines is
the mere (:-)) matter of a few minutes with a hand grinder.  Some kind of
sliding plate over a larger orafice could do the trick for dynamic timing,
and it doesn't have to operate at engine speed.
The rotary is a true four-stroke cycle engine, not a two stroke.



					Joseph L. Wood, III
					AT&T Information Systems
					Laboratories, Holmdel
					(201) 834-3759
					ariel!jlw