Views: 0 Author: Alfredturbo Publish Time: 2025-01-22 Origin: Site
Turbocharger actuator mainly composed of valve body, spring, actuator, etc. The actuator may contain diaphragms, tie rods, solenoid valves, etc. Different types of bypass valves may vary in their specific construction.
The flow and energy of the exhaust gas discharged from the engine is relatively small, the outlet pressure of the compressor is low, and the bypass valve is kept closed under the preload force of the return spring. In this way, all the exhaust gas discharged from the engine passes through the turbine end of the turbocharger, pushing the turbine to rotate, which in turn drives the compression turbine of the compressor to rotate, so that the intake boost pressure and volume increases. This make the engine have a better air intake at low speeds and improve its low-speed performance.
As the engine speed increases, the exhaust gas flow and energy increase significantly, and the intake pressure after supercharging will exceed the specified value. At this time, the supercharged gas acts on the diaphragm in the exhaust actuator. When the pressure exceeds the preload of the spring, the diaphragm is lifted up and drives the bypass valve rod to move, thereby opening the exhaust bypass valve. As a result, part of the exhaust gas does not pass through the turbine end of the turbocharger, but directly discharged into the atmosphere from the exhaust bypass channel. This reduces the turbine inlet flow and pressure, to slow down the turbo speed, thereby reducing the turbo pressure, preventing the engine from being damaged due to excessive supercharging, and ensuring the safe and stable operation of the engine at high speed.
1、Pressure monitoring and signal feedback: During engine operation, the boost pressure sensor monitors the pressure in real time and converts the pressure signal into an electrical signal for feedback to the engine computer (ECU). The sensor is usually installed in the intake pipe or back of the air cooler, and can accurately measure the actual pressure value after boosting.
2、ECU judge and give command: After receiving the signal from the boost pressure sensor, the ECU will compare and analyze it with the internal preset parameters. These preset parameters are set according to the design requirements and performance characteristics of the engine, covering the optimal boost pressure range under different working conditions. When the ECU determines that the monitored boost pressure is too high and exceeds the allowable range under the current working conditions, it will quickly send a control command to the solenoid valve of the wastegate to open it.
3、Bypass Valve Opening and Pressure Regulation: After receiving the command from ECU, the solenoid valve opens, and the current generates electromagnetic force through the solenoid valve to push the rod or other actuators to move, so that the bypass valve opens. In this way, part of the boosted gas will flow back to the inlet or other low-pressure areas through the bypass pipe, thus reducing the pressure of the turbocharger and achieving precise regulation of the boost pressure. In this way, the engine's boost pressure is always kept within a reasonable range. It helps to protect the engine and optimizing engine performance.
1. Ensure parts matched turbocharger：It is important to select suitable actuator to match the turbocharger and engine model precisely, otherwise it may lead to less pressure or over boosting for turbos. This will affect engine performance and life. For example, the turbocharger actuator of a certain Volkswagen engine model cannot be mixed with the actuators of other models.
2. Ensure correct installation position:The actuator should be installed strictly according to the specified position and direction to the turbo. The improper installation will affecting the control signal transmission and mechanical action, which will causing the actuator work abnormally. Even broken the turbo.
3. Solid fixed and connected with other parts:The connection between the actuator and related parts, such as connecting rods and shafts, must be firmly connected. to prevent loosening and dislodging during operation, which may cause malfunction of turbochargers.
1. keep it clean: the working environment of turbocharger always harsh. to regularly clean up the surface dust, oil, etc., so as not to enter the internal of the actuator and turbo.
2. pay attention to the working temperature:The turbo is in high temperature during operation, Need ensure that the engine cooling system is working properly, to prevent damage to the actuator due to high temperature.
3. Avoid the entry of foreign objects: to prevent small objects or impurities into the internal actuator, resulting in wear and tear of parts, stalling, etc..
1、 Regular inspection: check the operating condition of the actuator according to regulations, including control signals, mechanical action, connecting parts, etc., and find and solve problems in time.
2, professional maintenance: when a fault occurs, try to repair by professionals, repair with special tools and testing equipment to ensure the quality of maintenance.
