Functions and Workings of the Manifold Absolute Pressure (MAP) Sensor

Friday, March 24th 2017. | Review

On EFI engines there are three main interrelated components in order for optimal combustion generated on all the working conditions of the machine. The third component is the computer, sensors, and actuators. Sensor duty to detect conditions needed by the kumputer machine, and then send the information to the condition of the computer. Computer (ECU) functions to process the information from the sensors then control the penginjeksian in a way gave orders to the actuator in order to make fuel at injeksikan in number and the exact time according the working of the machine. An actuator carrying out the commands of your computer or ECU. The third main component consists of various components, such as sensors. Sensors on EFI vehicles there are many, including FOLDER (manifold absolute pressure) Sensor, IATS (intake air temperature sensor), oxygen sensor, etc. This article will discuss the functions and workings of one of the sensors on the engine the EFI it is MAP Sensor.

Function Of The Manifold Absolute Pressure (MAP Sensor)

Manifold Absolute Pressure sensor or manifold pressure sensors used on the engine the EFI type D function to detect the pressure in the intake manifold. MAP sensor is the most important sensors on EFI engines type d. Through IC inside the sensor, manifold pressure sensors will detect pressure signal as a PIM. Then the ECU will determine the length of penginjeksian or length of spraying and filing basic ignition angle based signal PIM. Construction of MAP sensor can saw in the picture below:

 

The Workings Of The Manifold Absolute Pressure (MAP Sensor)

Silicon chip combined with the vacuum chamber is mounted inside the MAP sensor. On one side of the chip is confronted with the pressure of the intake manifold and the other side is connected to the vacuum chamber. Then when there is a change of pressure in the intake manifold will cause a form of silicon chips change, and fluctuations of chip prisoners niai chip will be in accordance with the rate of change. These fluctuations in the value of the prisoners was later changed to a voltage signal by IC located within MAP sensor. The voltage signal is then sent from the terminal PIM to ECU as a signal the pressure in the intake manifold. Termnal VC engine will also supply a constant voltage it is 5 volts as a resource for the IC.

The graph of the pressure and the output voltage on the intake manifold can be seen in the picture below:

Electrical circuits And the manifold absolute pressure Sensor or a folder can have a look at the automotive Teachers buddy picture: