Fuel injection questions - -

[Andrew Dennison]

> > >	Odd thought... with a SENSITIVE air pressure switch in the intake
> > >	manifold, I wonder if it would be possible to detect the closing of
> > >	the intake valve... i.e. for sequential timing WITHOUT using a camshaft
> > >	sensor. Any comments?
> > >	
> 
> What advantage would the MAP-based data have over the camshaft sensor-based
> data?  I'd prefer the most direct measurement of the quantity of interest
> (valve position in this case).

I think you would require the crank sensor for accurate timing 
information, however the MAP pulses could be suitable for determining the 
optimum injector closing time. Sequential injection is only really 
useful for low loads to reduce fuel consumption and slightly increase 
torque - it isn't really necessary if you only care about power!

Andrew

------------------------------------
Andrew Dennison - Research Associate
CIM Centre - Swinburne University
PO Box 218 Hawthorn Victoria 3122 Australia
Phone: +61 3 9214 8296 Fax: +61 3 9819 4949