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Conference terri::cars_uk

Title:Cars in the UK
Notice:Please read new conference charter 1.70
Moderator:COMICS::SHELLEYELD
Created:Sun Mar 06 1994
Last Modified:Fri Jun 06 1997
Last Successful Update:Fri Jun 06 1997
Number of topics:2584
Total number of notes:63384

1513.0. "Electronic Ignition from scratch." by JUNO::WOOD (Pooh didn't use a blindfold) Wed Jul 24 1991 10:32

 I have just managed to persuade my Tutor at Polytechnic to allow me to do a
Fuel Injection system for my final year project, and am thus looking for any
info that I can on the subject. Unfortunately, I am leaving at the end of next 
week, so won't have much time ot read replies, although I may be able to 
persuade someone here to let me back in to read anything else that comes in
while I am 'on holiday'


 The main questions that I have been asking are :-

	1. Does anyone know of any good books on the subject ?

	2. What is the reason that distributors 'look' at the manifold 
depression. And thus will it be neccersary to look at this when I am working out
roughly how fast the engine is accelerating or deccelerating ?

	3. If it has a security system which requires a code to be entered 
before the engine is started, is it unreasonable to expect the user to only 
reset the code between turning the ignition on and starting the car ?


 Any other information would be gatefully receivesd also.

	Thanks

		 Alan
		~~~~~~
T.RTitleUserPersonal
Name		DateLines
1513.1Try this for part c...TIMMII::RDAVIESAn amateur expertWed Jul 24 1991 11:3030
    Straight away I can think of one problem with the security aspect. If
    the driver is inexperienced/a duffer/stupid/whatever it is unreasonable
    to expect them to enter the code between every turn of the key. 
    
    Imagine stalling across a carriageway with fast traffic bearing down on
    you, you turn the key too far back and you then have to re-enter the
    code!
    
    I would suggest once activated, the system remains active untill either
    	you sense the key withdrawn
    OR	You have a turn off delay to establish that the driver really is
    	turning off (like an alarm exit delay)
    OR	You key it to the door light switch or even better the central
    	locking
    
    e.g                               (or door opened or delay)	
    +->>DISABLED--<<-------------------<Y-CENTRAL LOCKING--N>----+
    |	   |                                 ACTIVATED?          |
    |	   |                                    |           (no effect)
    |	   |                                    ^                |
    |	   |                                    Y                |
    |	ENTER CODE                         IGNITION KEY          |
    |     OK?                               TURNED OFF?          |
    |      |                                    |                |
    +--<N--+---Y>------------------------>>--ENABLED--<<---------+
    
    Thus, activating the central locking with ignition ON has no effect
    	turning off the ignition WITHOUT locking the car has no effect
    
    Richard
1513.2JUNO::WOODPooh didn&#039;t use a blindfoldWed Jul 24 1991 11:3615
 Yes, thats very true. The security bit is currently only an 'extar marks' type
of idea, only thought of last night, so very little thought has gone into that,
then agian most of the thought that went in to the rest was about 6 months ago
when I started trying to persuade my tutor of the idea, thenI got given another
project, but have now been told that I can't do the other project, but this one
is a viable project after all !!!!!!!!


	Oh well.

	Thanks for the comments Richard.

		 Alan
		~~~~~~
1513.3JUNO::WOODPooh didn&#039;t use a blindfoldWed Jul 24 1991 11:389

 Hang on, just noticed what I put. I am in fact only doing Electronic ignition.
The original idea was for Fuel Injection, but it was deemed impossible to test
so it is just Electronic ignition that I am doing.


		 Alan
		~~~~~~