For Great Wall Air Intake Pressure Sensor 3611080-EG01

Description

The intake pressure sensor is the core component of the D-type fuel injection system of the electronic fuel injection engine. It is connected to the intake manifold through a vacuum tube and is a type of sensor that indirectly measures the intake air volume. It can be classified into two types based on the installation location: integrated (integrated with the intake air temperature sensor) and independent.

Core Functions
Pressure Measurement: Real-time monitoring of intake manifold absolute pressure, reflecting engine load conditions.
Fuel Control: Provides a reference signal to the ECU, accurately calculating injection duration and ensuring optimal air-fuel ratio.
Ignition Control: Adjusts ignition advance angle based on pressure changes to improve combustion efficiency.
Fault Diagnosis: Detects intake system anomalies (such as leaks and blockages), triggering fault codes to assist with repairs.
Operating Principle
Signal Conversion: A piezoresistive element converts pressure changes into resistance changes, which are then converted to a 0-5V voltage signal.
At idle, the signal is approximately 1-1.5V.
At full load, it rises to 4.5V.
Data Transmission: Four pins connect to the ECU, including power, ground, pressure, and temperature signal lines (integrated).