Re: [DML] Re: PRV Fuel Enrichment

[Jim Strickland <ihaveanaccount@xxxxxxxx>]

I don't remember exactly which 6.  I just remember back in the good old
days that I came up with that number.  

Here's some
1) warm up regulator circuit (electronic CPR bimetallic arm heater)
2) acceleration enrichment (vacuum controlled control pressure)
3) CPR (engine radiating heat affecting bimetallic arm)
4) Cold start valve
5) Wide open throttle switch
6) Lambda switch- fixed frequency valve duty cycle during warmup
7) Lambda system- variable frequency valve duty cycle depending on O2
sensor
8) Hot start relay

pick your favorite 6.

Jim


On Thu, 06 May 2004 20:49:00 +0100 Martin Gutkowski
<webmaster@xxxxxxxxxxxxxx> writes:
> Well, what enrichment systems are there (I'm intrigued by Jim's total 
> of 
> six, so let's add 'em up)
> 
> 1) Warm up enrichment - the most basic function of the control 
> pressure 
> regulator
> 2) Cold start valve - extra shot of fuel when the engine's below a 
> certain temperature, controlled by the thermotime switch on the top 
> of 
> the water pump.
> 3) Accelleration enrichment - vacuum fed to the CPR via delay valve 
> lowers control pressure when vacuum is "lost", but only for a few 
> seconds, and only when the engine's cold
> 4) Lambda system enrichment - firstly during warm up, which is not 
> strictly enrichment because it's just waiting for the exhaust sensor 
> to 
> get hot enough. However, this state in a hot engine results in rich 
> running which is why this is used for...
> 5) Full throttle enrichment - effectively puts the lambda ecu into 
> "warm-up" mode.
> 6) Errm. Not sure.
> 

...


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