injdata-voltage
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injdata-voltage [2012/10/15 13:21] twdorris |
injdata-voltage [2024/03/15 11:16] (current) |
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| The effect of varying voltage across an injector is easy for us to imagine because (1) the effect is pretty dramatic and (2) we can often demonstrate it ourselves while sitting in the car. The image below shows one simple example of topping out the power windows. But voltage is constantly being influenced by all sorts of things (alternator output which can be influenced by engine speed or fans coming on or off, etc.), so the effect is actually pretty common in the real world. | The effect of varying voltage across an injector is easy for us to imagine because (1) the effect is pretty dramatic and (2) we can often demonstrate it ourselves while sitting in the car. The image below shows one simple example of topping out the power windows. But voltage is constantly being influenced by all sorts of things (alternator output which can be influenced by engine speed or fans coming on or off, etc.), so the effect is actually pretty common in the real world. | ||
| - | |{{http://www.ecmtuning.com/images/forums/injbatadj-1.gif?300}}| | + | |{{https://www.ecmtuning.com/images/forums/injbatadj-1.gif?300}}| |
| ^ //Click to enlarge// ^ | ^ //Click to enlarge// ^ | ||
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| Obviously, this effect is huge. If the ECU calculates that it needs roughly 50 cc/min of fuel flow (for example), it would need to hold the injector open for 4 ms at 9 volt vs. about 2.3 ms at 12 volt. That's a really big difference and clearly illustrates why it's critical for smooth operation to get your voltage table set up correctly. | Obviously, this effect is huge. If the ECU calculates that it needs roughly 50 cc/min of fuel flow (for example), it would need to hold the injector open for 4 ms at 9 volt vs. about 2.3 ms at 12 volt. That's a really big difference and clearly illustrates why it's critical for smooth operation to get your voltage table set up correctly. | ||
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injdata-voltage.1350321690.txt.gz ยท Last modified: 2012/10/15 13:21 (external edit)
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