Bench racing ecms Even if ya hate 101 please read

[richard vandervoort]

>From my experience working with ABS valves (solenoid) it would seem foolish for the injector (solenoid) power to not be regulated.  If it is regulated there would not be any need to correct for voltage changes in software.  The time for the plunger to move should be relatively fast compared to the total on time of the solenoid.  Solenoid valves are usually rated by an on time, flow versus pressure curve, mimimum turn on voltage(or pressure), and duty cycle.  Flow through the valve is regulated by power on time.  Using high frequency PWM of voltage the flow rate through the valve can be partially controlled.  This however is dependant on plunger and valve seat shapes and may not work very well since typical injectors are designed for on off operation.




>garfield at pilgrimhouse.com wrote:
>> >my thinking was to eliminate any voltage corrections from the
>> >list of variables, so the 14.2 was a "must have",  or is this an error.
>> 
>> Geez, I dunno, is there really an adjustment to make if the ALT's not
>> charging, and the +BAT's only at +12V? NAH, all them sensors are
>> operating off regulated +5V, so you CAN use something other than an
>> actual battery. 
>
>Speaking as a "magazine expert" here...  Other people have posted that
>battery voltage makes a difference to the fuel injector as far as how
>fast it opens, etc.  So I believe the ECM does have a battery voltage
>correction for injector on time.
>
>
>
>--
>Steve Ravet
>International Meta Systems
>http://www.imes.com
>steve at imes.com
>


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