Electrohydraulic Camless Valves

[John Carroll]

The November 1996 issue of MACHINE DESIGN magazine 
has a article about a Ford run at a camless engine.  The valve 
actuation is by means of hydraulic pulses piloted by small 
electric solenoids.  The scheme is complete with hydraulic 
energy recovery at the end of the valve strokes to keep the 
power requirements down and to damp the action of the valves.

Ford's system seems to identify the concerns that will have to 
be addressed in any successful camless system.  The design 
is elegantly straightforward, but not one I would have come up 
with in a life time.

I could not find my copy of the magazine or find a path to it on 
the MACHINE DESIGN website.  The magazine should be 
archived in any engineering library, but I do not have access to 
one.  Perhaps some one with access could sneak a scan of the 
article to those who are interested.  Ford allowed it to be 
published once.  They may have it on line.

John Carroll

  
John Carroll
jcarr at cyberhighway.net
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