21 Mar
2001
21 Mar
'01
3:04 a.m.
At 07:41 PM 3/20/01 +0000, Pete wrote:
To drag this topic kicking and screaming back towards the list topic, as
many engines over the past 10 for 15 years have used computerised engine
management systems, why have we not seen much improvement in specific fuel
consumption?
Probably because carurators are a lot more effective than most people
think. One major advantage of the comperized system is that it should not
degrade over time the way that a mechanical carburator does. In addition,
an electronic system with it's feedback system can adjust for a wider range
of conditions than a carburator can. The one area where an electronic
system is much more effective than a carburator is in cold starting. In a
cold engine, a lot of the fuel puddles on the metal surfaces causing wasted
fuel and high hydro-carbon emmissions. Direct fuel injection in to the
combustion chamber alleviates a lot of that.
Joe