<VV> Air-cooled Diesels (CORVAIR) -

[FrankCB at aol.com]

Dale,
    That reminds me that raising the combustion temp OR  increasing the A/F 
ratio in our Corvair engines both raise the NOx level in the  exhaust 
significantly.  The high temp can be solved with water injection  while the increeased 
A/F ratio (even above stoichiometric 14.6:1) is not so easy  to solve.  Of 
course, we could have a SECOND and optional "map" setup in  our fuel injection 
program so that when we go for emission inspection the car  runs RICHER than 
stoich.  Reminds me of how I used to manually  "detune" the 140 just before I 
took it for the NJ emission test and then  "retune" it a half hour later in the 
company parking lot before I drove it  home.  But now it can all be done 
automatically by flicking a switch.   Ain't progress wonderful?
    Frank "libertarian" Burkhard
 
In a message dated 6/6/2008 11:34:13 AM Eastern Daylight Time,  
dkdewald at pasty.net writes:
[SNIP]

A  significant problem, beyond the obvious materials and lubrication  
technology, is that high operating/combustion temperatures lead to high  NOx 
emissions--which our EPA heavily regulates.

Dale  Dewald
Hancock, MI







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