simple analog fuel injection

[Simon Quested]

Hi All

> 2.  Would a thermister submersed in the engine coolant work as a secondary
> control over the pulse width from the 555 to give decent cold starts?

I'm half way through doing this on my car as the FI computer I have 
has no support for cold start. I have added an idle air by pass 
solenoid that opens when the engine is cold (using a temp sender 
and comparator circuit). At the moment I tweak the Master mixture 
pot to richen things up a bit at start up but I have thought of using a 
cold start  injector for this job. You could probably even use the CS 
injector as an " accelerator pump" controlled by TPS once the 
engine is warm. When the engine is cold the cold start circuit has 
control of the CS injector once the engine is warm control of the 
CS injector switches to the TPS "accelerator pump".
 
Just my .02 cents ..... not that you'd get much for it with the 
exchange rate at the moment =-)

Cheers

Simon
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  Simon Quested (E-mail questeds at lincoln.ac.nz)
  Computer Technician, Silicon Graphics & Windows NT Support
  Computing and Educational Resources
  LINCOLN UNIVERSITY OF NEW ZEALAND
  Phone (64)(03) 3252811 Ext. 8087
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http://www.lincoln.ac.nz/ccb/techs/simon/default.htm
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Madness takes its toll. Please have exact change.
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