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Laguna 2 (2001-2007)

Adaptive fuel-air mixture control (L7X) (Renault Laguna 2)

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  • Laguna 2 (2001-2007)
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  • Adaptive fuel-air mixture control (L7X)
0
Contents: Terms and Conditions 🠛 Interpretation of values obtained…🠛
In a closed control loop, during mixture ratio control (PR 35), the injection duration is adjusted in such a way as to obtain a dosage as close as possible to mixture ratio 1.

The correction value is close to 1, and the extreme values are 0.75 and 1.25.

Adaptive mixture correction allows you to adjust the injection algorithm so as to obtain a mixture correction value equal to 1.

The idle correction value is close to 0, and the limit values are -11% and +11%.

Adaptive corrections take 1 and 0 as the mean value after initialization (erasing information from memory) and have the following extreme values.

Adaptive corrections take 1 and 0 as the mean value after initialization (erasing information from…

Terms and Conditions



Hot engine (coolant temperature above 70°C and air temperature below 55°C).

Disconnect the absorber by disconnecting the wiring block from the electromagnetic valve, or plug the fuel vapor supply line to the engine.

Do not exceed the throttle opening angle relative to engine speed (see table).

Pressure range passed during testing



Pressure range passed during testing

After this test the correction values become effective.



The test should be continued on the move, driving 8 times under normal conditions at constant and variable speed for a distance of 5-10 km.

After the test, check the correction values. The initial values of 1 and 0 should have changed. Otherwise, repeat the test, strictly observing the conditions for its implementation.

Interpretation of values obtained during road tests



When there is a shortage of gasoline, the regulation of the working mixture composition (in PR 35) is increased in such a way as to obtain a mixture composition as close as possible to 1. At the same time, the adaptive correction of the working mixture composition is increased so that the value of the mixture composition correction fluctuates around 1. When there is an excess of fuel, everything happens the other way around.
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Article has been reviewed by editor: Podkrepilov Maxim
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Laguna 2: Fuel injection (petrol)
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Adaptive correction of the working mixture composition (K4M and F4P)
Adjusting the composition of the working mixture (L7X)
Regulation of the composition of the working mixture (K4M and F4P)
Adaptive engine idle speed correction (K4M and F4P)
Idle speed correction depending on coolant temperature (L7X)
Centralized control of coolant temperature (K4M and F4P)
Centralized Coolant Temperature Control (L7X)
Camshaft Phase Regulator (F4P)
Camshaft Phase Regulator (L7X)
Speed controller and limiter (K4M and F4P)
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Laguna 2 (2001-2007) 
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