We're not talking about the same phenomenon. You use the term surge -
generally interpreted as short duration & slight to moderate acceleration.
The typical sudden accel event that I've been involved with is a longer
duration event that appears to duplicate a wide open throttle event & most
times is purported to not be controllable with the brake application.
With the fuel injection systems that I'm familiar with the throttle body
acts as an air valve, which is controlled by your right foot. Fuel is
controlled by the engine processor & is added to the combustion process
based on the position of the throttle. Air, fuel & spark must be combined at
specific ratios for correct combustion to be obtained. Too much fuel & the
engine runs rich & doesn't produce optimum power. Too little fuel & the
engine runs lean & doesn't produce optimum power.
Additionally, what you're talking about is taking place outside the
combustion chamber. I don't see how that has anything to do with the
production of engine power.
Kenneth Waller
----- Original Message -----
From: "mike wilson" <[EMAIL PROTECTED]>
Subject: Re: Re: OT: HCB with a Minolta CLE
From: "Kenneth Waller" <[EMAIL PROTECTED]>
Most major auto manufacturers have been sued with sudden accel as the
allegation.
I've experienced this with a couple of vehicles. As far as I could
ascertain, it was a function of the fuel delivery system to deliver excess
fuel if the catalytic converter temperature fell below a threshhold. The
unburnt fuel reacted in the cat and raised the temperature - a byproduct
was a small surge in acceleration, rather like the one you feel when the
injectors kick back in on the overrun to generate idle speed but much more
prolonged and at any throttle opening.
mike
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