The following is a detailed explanation of the method for evaluating the performance of fan clutches:
1. Cold start: There are various types of fan clutches, including mechanical silicone oil and electronic silicone oil. The characteristic of a silicone oil clutch is that it is fully engaged when the vehicle is first started, but it will disengage after about 1 minute. If you notice a significant decrease in engine noise within this one minute period, it indicates that the fan has disengaged, which means that the clutch function is normal.
2. Increase idle speed: The purpose of increasing idle speed is to more clearly judge the operating status of the fan through noise.
3. Excessive air volume may cause the engine temperature to rise too slowly.
4. Insufficient air flow may cause the engine to overheat, thereby affecting its normal operation.
Additional information: The speed design of the fan is based on ensuring that the engine does not overheat under the most unfavorable usage conditions. Therefore, in daily driving of vehicles, the fan speed should be maintained within an appropriate range, which can not only reduce noise but also improve engine economy.
