Power generation control method, system, medium and program product for extended-range hybrid vehicle

By adaptively matching the steering of the engine and generator in extended-range hybrid vehicles, the problem of engine damage caused by misjudgment of generator steering is solved, stable synchronization of the generator and engine is achieved, and the safety and performance of the vehicle are improved.

CN120245940BActive Publication Date: 2025-09-19WEICHAI POWER CO LTD
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Patent Information

Application Number
CN202510742117.5
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-06-05
Publication Date
2025-09-19
Estimated Expiration
2045-06-05

AI Technical Summary

Technical Problem

In extended-range hybrid vehicles, the engine is susceptible to damage due to misjudgment of the generator's rotational direction. In particular, when the generator's resolver sensor is installed upside down or the generator controller's speed signal timing is incorrect, the engine may reverse to a high speed and be damaged.

Method used

The process of adaptively matching the steering of the engine and generator includes setting the torque and speed of the generator to zero when power generation is required, identifying the operating status of the generator, adjusting the engine torque or fuel injection amount, and starting power generation when the speed signals are synchronized, identifying and correcting steering errors to ensure the synchronization of the speed signals of the generator and engine.

Benefits of technology

It effectively avoids generator nominal direction errors and speed control command errors, reduces the risk of the engine being dragged in the reverse direction, ensures stable engine operation, and improves vehicle safety and performance.

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Abstract

The present disclosure provides a power generation control method, system, medium, and product for a range-extended hybrid vehicle, relating to the technical field of hybrid vehicles. The method includes: when the range-extended system is connected to a high-voltage power supply and the vehicle has a power generation demand, sending a first control instruction to the generator controller for setting the torque and speed of the generator to zero; identifying whether the generator is in an operating state; when the generator is in an operating state, urgently reducing the high voltage of the range-extended system; when the generator is in an inoperative state, sending a second control instruction to the engine controller for setting the torque or fuel injection amount of the engine to zero and starting the starter, obtaining a first speed signal of the generator and a second speed signal of the engine, and terminating the process when the first speed signal and the second speed signal are positive synchronization signals, and controlling the range-extended system to start power generation. This method determines the power generation timing based on the judgment of the positive synchronization signal, which can significantly reduce the risk of the engine being dragged in the reverse direction.
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