Intake pressure sensor.
Air intake pressure sensor (ManifoldAbsolutePressureSensor), hereinafter referred to as a MAP. It is connected to the intake manifold with a vacuum tube, and with the different speed load of the engine, the vacuum change in the intake manifold is induced, and then the resistance change in the sensor is converted into a voltage signal for the ECU to correct the injection amount and ignition timing Angle.
In the EFI engine, the intake pressure sensor is used to detect the intake volume, which is called the D-injection system (velocity density type). The intake pressure sensor detects the intake volume is not directly detected like the intake flow sensor, but uses indirect detection, and it is also affected by many factors, so there are many different places in the detection and maintenance than the intake flow sensor, and the fault generated also has its particularity.
The intake pressure sensor detects the absolute pressure of the intake manifold behind the throttle valve, which detects the absolute pressure change in the manifold according to the engine speed and load, and then converts the signal voltage to the engine control unit (ECU), and the ECU controls the basic fuel injection amount according to the size of the signal voltage.
The intake pressure sensor is a kind of sensor used to monitor the pressure change in the engine intake system. It plays an important role in cars or other internal combustion engine equipment.
The main functions of the intake pressure sensor are as follows:
1. Fuel adjustment: The intake pressure sensor can measure the pressure in the intake pipe and provide accurate intake pressure data to the engine control unit. Based on this data, the control unit can adjust the fuel supply to provide higher combustion efficiency and performance.
2. Engine control: The signal of the intake pressure sensor is also used for the development of engine control strategies. Adjust ignition timing, valve timing, and other key parameters based on changes in intake pressure for better power output, fuel economy, and emissions control.
3. Fault detection: The intake pressure sensor can monitor the working status of the intake system and send a fault code to the control unit when an anomaly occurs. This helps to detect and diagnose problems related to the intake system, such as air leakage in the intake pipe, sensor failure or abnormal pressure.
All in all, the intake pressure sensor provides accurate data for engine control by measuring pressure changes in the intake duct to optimize combustion efficiency, power output and emissions control. It plays an important role in the normal operation and fault diagnosis of the engine.
What are the symptoms of a broken intake temperature sensor?
01 Engine is boring
A dull engine is a clear symptom of a faulty intake temperature sensor. When the water temperature signal provided by the intake air temperature sensor to the ECU is higher than the actual water temperature, the mixture will be thin, resulting in slow engine acceleration and decreased power. In addition, because the ECU does not get an accurate water temperature signal, the mixture may be too thick or too thin, making it difficult to start the cold car. Therefore, to solve this problem, it is usually necessary to overhaul the intake air temperature sensor.
02 Can not accurately control the fuel injection
Damage to the intake temperature sensor will result in an inability to accurately control the fuel injection. This is because the intake air temperature sensor is responsible for monitoring the temperature of the air entering the engine and passing this information to the vehicle's electronic control unit (ECU). The ECU adjusts the fuel injection volume based on this data to optimize engine performance and fuel efficiency. If the sensor is damaged, the ECU will not be able to obtain accurate air temperature data, resulting in inaccurate fuel injection. This not only affects the performance of the engine, but may also lead to increased fuel consumption.
03
The fan is always running or not running
The damage of the intake air temperature sensor may cause the fan to rotate normally or not. When there is a problem with the intake temperature sensor, it cannot accurately read the coolant temperature of the engine, which affects the fan control unit. If the sensor reading is low, the fan may keep running in an attempt to lower the coolant temperature. Conversely, if the reading is high, the fan may not start, causing the engine to overheat. Therefore, the abnormal behavior of the fan may be a clear symptom of the failure of the intake air temperature sensor.
04 Abnormal water temperature indicator
Abnormal water temperature indicator is an obvious symptom of damaged air intake temperature sensor. When there is a problem with the intake temperature sensor, it may not be able to accurately read the coolant temperature of the engine, resulting in an inaccurate reading of the water temperature gauge. This inaccuracy may cause the driver to misjudge the temperature state of the engine, which in turn affects driving safety. Therefore, once the water temperature indicator is found abnormal, the intake air temperature sensor should be checked as soon as possible and the necessary repair or replacement.
If you want to know more, keep reading the other articles on this site!
Please call us if you need such products.
Zhuo Meng Shanghai Auto Co., Ltd. is committed to selling MG&MAUXS auto parts welcome to buy.
