Method for controlling the speed of a vehicle-mounted silicone oil fan, speed control device and vehicle

By adjusting the set speed of the silicone oil fan to maintain the difference between the engine speed and the set speed, the problem of delayed silicone oil fan speed control at engine idling or low speed is solved, resulting in faster response time and more effective air conditioning cooling.

CN117823444BActive Publication Date: 2026-07-21WEICHAI POWER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WEICHAI POWER CO LTD
Filing Date
2024-01-03
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

When the engine is idling or at low speed, the silicone oil fan tends to run at full speed, which can lead to a long delay in fan speed control.

Method used

By acquiring the target first speed and the target second speed, the set speed of the silicone oil fan is adjusted according to the engine speed. The difference between the engine speed and the set speed is kept greater than the threshold to prevent a large amount of silicone oil from entering the fan and to ensure that the fan operates at a non-full speed.

Benefits of technology

The response time of the silicone oil fan speed control has been shortened, avoiding the problem of excessive delay in speed control due to the silicone oil fan at idle or low speed, thus ensuring effective heat dissipation of the vehicle air conditioner.

✦ Generated by Eureka AI based on patent content.

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    Figure CN117823444B_ABST
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Abstract

The application provides a speed control method and device of a vehicle-mounted silicone oil fan and a vehicle. The method comprises the following steps: obtaining a target first speed and a target second speed, the target first speed being a first speed at a current moment, the first speed being a speed of a transmitter, the target second speed being a second speed at the current moment, and the second speed being a set speed of the vehicle-mounted silicone oil fan; in a case where the target first speed is less than a first threshold, reducing the target second speed to keep a first speed deviation greater than a second threshold, the first speed deviation being a difference between the target first speed and the target second speed; and in a case where the target first speed is greater than or equal to the first threshold, keeping the target second speed unchanged. The application solves the problem that in the prior art, the silicone oil fan is prone to full-speed in the idle speed or low-speed state of the engine, which causes a long delay in fan speed control.
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