water injection

[TMead17327 at aol.com]

In a message dated 12/20/98 8:32:58 AM Central Standard Time,
edwards at mail.sunbeach.net writes:

<< Now we are getting some where when it comes to water injection. I can see
 water injection working if there is DIRECT injected after the combustion
 stroke. Before the piston reaches TDC when there is as little exhaust gas
 in the chamber and just before the piston starts its downward trip.
 
 (1) You woukld not want to inject the water with a full chamber of exhaust
 gases (would require too much water + it would take too much energy out of
 the exhaust gases, you turbo nuts know this). 
 
 
 (2)Injection at the right time may also aid cylinder filling. Hot air takes
 up more room than cooler air, the hot air will contract, when the water is
 injected, and create a pressure drop, It may suck the exhaust bach in the
 chamber, or it may suck the intake gasses in. Intake and exhaust design
 will be such that you get the the intake being sucked in. 
 
Mitsubishi uses a third valve - "jet valve" - to inject air into the cylinder
to improve combustion on some of their engines.  It is driven by a camshaft
lobe.  Could this perhaps be modified (re-jetted, change timing and duration,
etc.) to be useful for water injection?  The air reaches the head via the
intake manifold, so obviously some re-engineering of the intake would be
required.

Just thinking. . . 

Tommy
TMead17327 at aol.com

 
 "It took me just about 1/2 an hour to brain storm this, so it may have some
 flaws.
 
 Pedro"