Answer :
Final answer:
A fuel injection system that uses a MAP sensor is called a speed density type injection system. The MAP sensor measures the pressure in the intake manifold to determine air intake and adjust fuel injection accordingly. Therefore, the correct answer is b) speed density.
Explanation:
Fuel Injection System Using MAP Sensor
A fuel injection system that utilizes a MAP sensor (manifold absolute pressure) to assess the amount of air entering the engine is known as a speed density injection system. In this system, the MAP sensor measures the pressure within the intake manifold, which helps determine the air density and, consequently, the mass flow of air into the engine.
The process works by using the measured pressure to calculate the total air mass entering the engine, allowing the fuel injection system to adjust the amount of fuel injected accordingly for optimal combustion.
Options Explained
- a) Common rail: This type of system uses a shared high-pressure fuel rail for multiple injectors but does not primarily rely on a MAP sensor.
- b) Speed density: As mentioned, this is the correct answer as it uses a MAP sensor to determine air intake.
- c) Mass airflow: This system relies on a MAF sensor to measure the volume of air entering the engine, not a MAP sensor.
- d) Stoichiometric: This refers to the ideal ratio of fuel to air for complete combustion, rather than a type of fuel injection system.
In conclusion, the correct answer is b) speed density.
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