Engine coolant temperature control method and apparatus
By performing first-order low-pass filtering and dynamic optimization on the engine coolant temperature, combined with PID control, the problems of control accuracy and robustness when the engine coolant temperature changes greatly are solved, achieving more stable temperature control and improving engine protection and fuel economy.
CN116927936BActive Publication Date: 2026-02-27DONGFENG MOTOR GRP
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Patent Information
- Application Number
- CN202310862734.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2043-07-13
AI Technical Summary
Technical Problem
When the engine coolant temperature varies greatly, the closed-loop control suffers from low accuracy and poor robustness.
Method used
By performing a first-order low-pass filter on the actual coolant temperature, combined with dynamic optimization of the target temperature, and employing closed-loop PID control, temperature adjustment is performed using fan speed and sensor data. This includes temperature switching, transition, and reduction control after filtering, and self-learning to update the filter coefficients to ensure the stability and accuracy of temperature control.
Benefits of technology
It improves the accuracy and robustness of engine coolant temperature control, reduces temperature fluctuations, protects the engine, and improves fuel economy.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses an engine coolant temperature control method and device, the method comprises the following steps: first-order low-pass filtering processing is carried out on the actual coolant temperature to obtain the filtered actual coolant temperature; it is judged whether the actual coolant temperature switching condition is satisfied or not, if yes, the actual temperature adopts the filtered actual coolant temperature, otherwise, the actual temperature continues to adopt the actual coolant temperature; in the two temperature switching processes, the absolute value of the change rate does not exceed the preset change rate value; the target coolant temperature is obtained as the original target temperature, dynamic optimization is carried out to obtain the final target temperature, and closed-loop PID control is carried out on the engine coolant temperature according to the final target temperature and the actual temperature; including: original target temperature reset, original target temperature transition, original target temperature decrement and other conditions, and the priority is lower and lower. The application solves the problems of low closed-loop control precision and poor robustness when the target coolant temperature changes greatly.
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