Questions....

[Bob Valentine]

On Wed, 15 Feb 1995, Richard N Dabney wrote:

> >1) What are the differences between "peak-n-hold" and
> >saturated injectors?  Is it just the coil resistance,

> The voltage it takes to pull in an injector is greater than the voltage 
> it takes to hold it on. A higher voltage limits the on/off frequency of
> the  injector because of the back-emf generated by the "saturated",

    I was under the impression that it was current that was dealt with 
when driving injectors.   The description of how Cherry Semi's CS-452 is 
that "when the current reaches a pre-set level, the driver reduces 
current by a 4:1 ratio and operates as a constant current source.  This 
holds the injector open and reduces system power dissipation"

    I'm still on a learning curve here, so correct me if I'm wrong. 

                     -->   Bob Valentine  <--  
                    --> ravalent at liii.com  <--  
            "Hard Acceleration Saves Costly Aggravation"