Car content

ℹ️ ℹ️ Ángulo Correcto de Inyección

(also known as the pulse duration of the nozzle)

Depending on the design of the nozzle system and the specific characteristics of the engine, this parameter determines how long the nozzle is open to supply fuel, measured in units of milliseconds (ms).

⭕️ Typical value of the pulse duration of the nozzle.

• Light Walk Round (Ralenti):

Between 2 milliseconds and 4 milliseconds.

In this state, the engine needs minimal fuel to maintain operation.

• Minor Acceleration Cycle (Carga Parcial):

Between 4 milliseconds and 8 milliseconds.

In this state, the engine needs a slight increase in fuel to maintain speed or perform light acceleration.

• Full Power Round (Carga Máxima):

Between 10 milliseconds and 20 milliseconds.

In this state, the system supplies the largest amount of fuel to achieve maximum power.

➡️ Factors affecting the pulse duration of the nozzle:

• Air Volume Sensor (MAF) or Air Pressure (MAP):

Determine the amount of air entering the engine and adjust the pulse duration of the nozzle.

• Oxygen sensors:

Measure the proportion between air and fuel and help adjust the fuel injection duration.

• Engine temperature:

Cold engines often need a longer pulse to compensate for incomplete combustion.

• RPM (RPM):

Higher engine cycle speeds increase the injection frequency, but this does not always mean that the pulse duration is longer.

• Engine Tuning:

Injector replacement, intake or exhaust system customization, may cause standard values to change.

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🚨 Issues related to fuel injection:

• Too long pulse:

It can cause an overdense fuel mixture, resulting in fuel consumption, and a carbon stain on the spark plug.

• Too short pulse:

This causes an overly thin mixture, loss of power, and may damage the piston or valve due to overheating.

• Sensor breakdown:

A defective sensor may send the wrong data to the ECU, causing the pulse duration to crash.

• Dirty Nozzle:

This reduced the fuel supply. The system had to compensate with a longer pulse.

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