Injector Duration (msecs) in 2D/3D Graphs

s300 and SManager software questions & answers
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Johnny_9
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Injector Duration (msecs) in 2D/3D Graphs

Post by Johnny_9 » Sat Jul 31, 2010 9:54 pm

What are the fuel units in ROM Editor not milliseconds?

Injector duration varies with a number of different conditions (water temperature, air temperature etc) and is not linear. E.g. an injector duration of 4ms will not deliver twice the fuel of an injector duration of 2ms (it will be almost three times the fuel). The numbers in the fuel tables are arbitrary linear fuel values. A fuel value of 500 will deliver twice the fuel of a value of 250. You can see the approximate injector duration on the 2d and 3d graph views by selecting Show Injector Duration

How do you do this in 2D/3D graphs?

Do we use Shift+F7, (after Options>Settings>Sensor Overlay and setting the sensor to INJ?

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Spunkster
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Post by Spunkster » Mon Aug 02, 2010 4:44 pm

There are no units in the fuel tables. They are just numbers...doubling the number doubles the fuel in that cell.

I don't under stand exactly what you are asking.

Luke
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Post by Luke » Tue Aug 03, 2010 2:56 am

maybe he wants to know how much fuel is injected at a specific moment.

IF the numbers were the timing in msec, you could figure out, how much fuel is provided to the chambers per hour/mileage/km or whatever just through calculating the time, injector-size and pressure (if it's not stock or corresponding to the injectors)

by the way: how can it be, that in the stock P30 JDM map there are injector duty cycles >100%??
The same map in another software says it's <100% (round 70-80%)?!

pretty strange in my opinion. is there a fault in the other software? or in hondata?

best regards
Luke

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Hondata
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Post by Hondata » Tue Aug 03, 2010 8:13 am

The fuel units are linear units which are converted to injector duration after compensations and injector dead time compensation.

A stock fuel map often will show over 100% duty at redline (obviously the duty stays at 100%).
Hondata

Johnny_9
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Post by Johnny_9 » Wed Aug 04, 2010 6:04 am

Hondata wrote:The fuel units are linear units which are converted to injector duration after compensations and injector dead time compensation.

A stock fuel map often will show over 100% duty at redline (obviously the duty stays at 100%).
QUOTE FROM THE TECH FAQ "You can see the approximate injector duration on the 2d and 3d graph views by selecting Show Injector Duration "

My question was "what do you click"

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Spunkster
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Post by Spunkster » Wed Aug 04, 2010 9:41 am

That is referring to the old no longer supported version of Romeditor, not Smanager.

Luke
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Post by Luke » Wed Aug 04, 2010 11:37 am

is there a possibility to add such a function to check the exact amount of fuel injected?

would be great to know the exact amount of fuel injected, since we want to test some fueling in university here.

best regards
Luke

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Hondata
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Post by Hondata » Thu Aug 05, 2010 9:05 am

Because of compensations it is not possible to precisely calculate the fuel delivery from the tables. With the engine running the 'injector duration' will be accurate.
Hondata

Luke
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Post by Luke » Sat Aug 21, 2010 1:33 am

well, what if the compensations are for such messurements turned to 0%?
isn't the value in the table just the reference, from where compensations are done?

something else would be bullsh*t...

best regards Lukas

Johnny_9
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ELD

Post by Johnny_9 » Wed Aug 25, 2010 4:30 am

What about ELD compensation which are not visible in Hondata? You would need to log for ELD and ALTF and build a INJ database round each permutation.

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