Open loop: Difference between revisions
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Open loop fueling is used in cars equipped with narrow band O2 sensors to determine the injector on time w/o using feedback from the sensors. Generally, it is based on the amount of air metered by the [[mass air flow]] sensor. |
Open loop fueling is used in cars equipped with narrow band O2 sensors to determine the injector on time w/o using feedback from the sensors. Generally, it is based on the amount of air metered by the [[mass air flow]] sensor, and whether the desired AFR is stoichiometric (lambda=1) or not. |
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Motronic will go open loop under any of the following conditions |
Motronic will go open loop under ''any'' of the following conditions |
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* At motor start |
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* When load > RLLRUN + TRAB delay time |
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* When req lambda != 1 |
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Note that there are other open loop conditions, such as during idle under certain circumstances, and at fuel-cutoff during overrun. |
Note that there are other open loop conditions, such as during idle under certain circumstances, and at fuel-cutoff during overrun. |
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Latest revision as of 20:00, 29 December 2009
Open loop fueling is used in cars equipped with narrow band O2 sensors to determine the injector on time w/o using feedback from the sensors. Generally, it is based on the amount of air metered by the mass air flow sensor, and whether the desired AFR is stoichiometric (lambda=1) or not.
Motronic will go open loop under any of the following conditions
- At motor start
- When load > RLLRUN + TRAB delay time
- When req lambda != 1
Note that there are other open loop conditions, such as during idle under certain circumstances, and at fuel-cutoff during overrun.