In the National IV engine, we can often see the word “electronically controlled silicone oil fanâ€. Every time we mention it, there is a saying that using an electronically controlled silicone oil fan can effectively reduce fuel consumption. For many truck driver friends, it is both familiar and familiar with electronically controlled silicone oil fans. At the 2014 Beijing Auto Show, China Truck Network Xiao Bian saw the electronically controlled silicone oil fan brought by BorgWarner and learned about it together with Xiaobian.
There are many factors that affect the vehicle's fuel consumption. Whether the engine, transmission system, tires, and running wind resistance are reasonably matched. The optimal matching can effectively reduce the fuel consumption. The engine is the key factor affecting the fuel consumption, and how to improve the engine thermal efficiency, Controlling the cooling fan speed of the engine is even more important. An efficient and labor-saving cooling fan can reduce engine power loss and improve fuel economy.
At present, the common cooling fans are mainly electronically controlled silicone oil clutch fans and bimetal temperature-sensing clutch fans. The principle is as follows:
The electronically controlled silicone oil fan is different from the traditional bimetal temperature sensing control mode. The technical principle of the electronically controlled silicon oil clutch is the control signal line. The temperature sensor installed in the radiator directly senses the temperature of the coolant and sends it to the engine control unit ECU. After the ECU judges by the logic module, it sends a corresponding pulse signal. The pulse signal controls the solenoid valve in the electronic silicon oil clutch and drives the inside of the clutch. The valve plate opens or closes the clutch.
Electronically controlled silicone oil fans can achieve a more accurate and rapid response. In reducing system noise, saving energy consumption than the same temperature products have a significant increase. Can improve fuel consumption and reduce engine power consumption by 6%-10%.
In addition, the fan of the electronically controlled silicone oil fan brought by BorgWarner this time is optimized, and the air flow rate and 7% static pressure efficiency are increased by 8% year-on-year, which can effectively reduce the engine temperature to 3 degrees Celsius.
For foreign countries, electronically controlled silicone oil fans have been widely used and the technology is relatively mature. But in our country is still in its infancy, because the price is still unacceptable to many users, BorgWarner has also designed a localized common silicone oil clutch fan according to the situation. The principle is based on testing the response of the intake air temperature excitation sensor to control the fan speed, not through the ECU. control. This is also a significant improvement over past fan technology.
The technical principle of the bimetal thermostat clutch is the heat signal transfer process. The coolant passes through the radiator and exchanges heat with the cold air flowing through the radiator. The bimetal at the front of the temperature sensing type clutch starts to deform after it senses the temperature of the air flow, and drives the valve inside the clutch to open or close the clutch so as to achieve the purpose of controlling the speed of the fan.
Through the above comparison, I believe that you have understood the importance of small cooling fans. The electronic silicon oil clutch is mainly used in high-end large passenger cars, trucks and some construction machinery vehicles with Euro III emissions and above, which can effectively reduce fuel consumption, reduce engine load, and reduce exhaust emissions. emission. This is meeting China's current national IV emission requirements. Xiao Bian believes that with the continuous upgrading of technology and increasingly stringent emission requirements, BorgWarner's advanced electronically controlled silicone oil fans will gain popularity.
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