List four types of sensors used in MPFI system, state their locations and functions.

List four types of sensors used in MPFI system, state their locations and functions.
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1 Answer

Answer :

Sr.
Name
Function
Location
1 Oxygen Sensor
Measuring the quantity of oxygen in exhaust 
Located at inlet and outlet side of catalytic converter
2 Mass air flow(MAF) Sensor
It is used to tell the ECU the mass of air entering the engine.
Mounted between air filter and turbocharger.
3 Coolant temperature sensor
Measures the temperature of the coolant in the System and sends signal to ECU. 
There are two sensors fitted on water box. 
4 Throttle position sensor
It supplies information to the ECU about the position the throttle is in inlet manifold.
The sensor is usually located on the butterfly spindle/shaft so that it can directly monitor the position of the throttle.
5 Crank position sensor
It supplies information to the ECU about the position and rotation of the crank shaft.
This sensor is mounted on the cylinder block behind the flywheel.
6 Vehicle speed sensor
Sends electrical pulses to the ECU about the speed of vehicle.
This sensor is mounted on gear box on speed output location.
7 Cam Sensor
It senses cam position and corresponding signal is sent to the ECU.
This sensor is fitted on cylinder head cover.
8 Knock sensor
It detects the vibrations generated during the combustion process and supplies signal to the ECU.
This sensor is fitted on cylinder block.
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