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docs: update configuration/Staged_Injection

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Administrator 2020-01-07 00:05:14 +00:00 committed by Josh Stewart
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configuration/Staged_Injection.md
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@ -1,3 +1,11 @@
---
title: Staged Injection
description: Configuring multi-stage fuel injection
published: true
date: 2020-01-07T00:05:13.360Z
tags:
---
Staged Injection Staged Injection
---------------- ----------------
@ -7,8 +15,10 @@ Speeduino has the ability to control a secondary fuel stage for engines that hav
No matter which control strategy is chosen, you must enter the sizing of the primary and secondary injectors in order to allow Speeduino to know the split in the overall fuelling. No matter which control strategy is chosen, you must enter the sizing of the primary and secondary injectors in order to allow Speeduino to know the split in the overall fuelling.
<font color="red">**CRITICAL**</font> - The req-Fuel value in the [Engine Constants](Engine_Constants "wikilink") MUST be updated when staged injection is turned on. **When staging is in use, the value entered in the req_fuel calculator MUST be equal to the sum of both the primary and secondary injector sizes** > **CRITICAL** - The req-Fuel value in the [Engine Constants](Engine_Constants "wikilink") MUST be updated when staged injection is turned on. **When staging is in use, the value entered in the req_fuel calculator MUST be equal to the sum of both the primary and secondary injector sizes**
Failure to set these values correctly will result in excessive rich or lean conditions. > Failure to set these values correctly will result in excessive rich or lean conditions.
{.is-danger}
**Eg:** **Eg:**
**Primary Injectors :** 300cc **Primary Injectors :** 300cc
@ -19,6 +29,7 @@ Failure to set these values correctly will result in excessive rich or lean cond
<img src="https://raw.githubusercontent.com/speeduino/wiki/master/staging/staging_settings.PNG" width="400" /> <img src="https://raw.githubusercontent.com/speeduino/wiki/master/staging/staged_reqfuel.PNG" width="400" /> <img src="https://raw.githubusercontent.com/speeduino/wiki/master/staging/staging_settings.PNG" width="400" /> <img src="https://raw.githubusercontent.com/speeduino/wiki/master/staging/staged_reqfuel.PNG" width="400" />
</center> </center>
### Control methods ### Control methods
Speeduino provides 2 staging control modes, each with their own strengths and weaknesses. In most cases it is recommended to start with the Automatic mode, which only requires tuning of the standard VE table, and reviewing to see if you get the desired outcome. Only if this can't be tuned to give a satisfactory fuel split would changing to the manual table tuning be recommended. Speeduino provides 2 staging control modes, each with their own strengths and weaknesses. In most cases it is recommended to start with the Automatic mode, which only requires tuning of the standard VE table, and reviewing to see if you get the desired outcome. Only if this can't be tuned to give a satisfactory fuel split would changing to the manual table tuning be recommended.
@ -26,8 +37,9 @@ Speeduino provides 2 staging control modes, each with their own strengths and we
#### Table control #### Table control
Table control allows the use of a manual 8x8 map that indicates what percentage of the fuel load will be performed by the **secondary** injectors Table control allows the use of a manual 8x8 map that indicates what percentage of the fuel load will be performed by the **secondary** injectors
0% = Secondary injectors disabled - 0% = Secondary injectors disabled
100% = Primary injectors disabled - 100% = Primary injectors disabled
It is important to note that the values in this table do NOT correspond directly to the split of the duty cycle or pulse width. They represent the percentage of the total fuel load that the secondaries will be asked to perform. The affect this value has on the pulse width depends on the ratio of the primary and secondary injector capacities. It is important to note that the values in this table do NOT correspond directly to the split of the duty cycle or pulse width. They represent the percentage of the total fuel load that the secondaries will be asked to perform. The affect this value has on the pulse width depends on the ratio of the primary and secondary injector capacities.
One disadvantage of the table tuning method is that it does not allow for the full fuel load of the primary and secondary injectors to be used simultaneously. As the table is a split of the total fuel load, as one set of injectors performs more, the other will perform less. One disadvantage of the table tuning method is that it does not allow for the full fuel load of the primary and secondary injectors to be used simultaneously. As the table is a split of the total fuel load, as one set of injectors performs more, the other will perform less.