Hybrid power drive system, vehicle and drive system control method

By designing a hybrid drive system including motor drive gear and parking gear, the problem of energy consumption and overheating of the drive motor in the parking mode in the prior art is solved, and parking locking and efficient braking without energy consumption is achieved, reducing EPB wear and braking safety hazards.

WO2025055573A1 Publication Date: 2025-03-20GUANGZHOU AUTOMOBILE GROUP CO LTD
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Patent Information

Application Number
PCT/CN2024/108146
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-14
Filing Date
2024-07-29
Publication Date
2025-03-20

AI Technical Summary

Technical Problem

In the parking mode/stop mode, the existing power shunt hybrid system requires the drive motor torsion the generator to generate power, which causes the drive motor to consume energy and is prone to blockage, causing overheating and demagnetization failure, and frequent startup of the EPB will accelerate wear and cause braking safety hazards.

Method used

A hybrid drive system is designed, including an engine, a first motor, a first engagement and disconnection device, a planetary gear mechanism, a second motor, a motor drive gear and a parking gear. The vehicle parking is realized by locking the parking gear, avoiding the driving motor from squeezing the power generation, reducing the risk of energy consumption and overheating, and reducing the frequency of EPB usage.

Benefits of technology

It can lock the vehicle without energy consumption when parking or parking, avoid overheating and demagnetization of the drive motor, reduce EPB wear, eliminate vehicle braking safety hazards, and improve system reliability and safety.

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Abstract

A hybrid power drive system, a vehicle and a drive system control method. The hybrid power drive system comprises an engine (1), a first electric motor (2), a first engagement and disengagement device (3), a planetary gear mechanism (4), a second electric motor (5), a first shaft (6), a second shaft (7), an intermediate shaft (8), an intermediate shaft gear (9), a main reduction driving gear (10), a main reduction driven gear (20), an electric motor driving gear (30), a parking gear (40) and a differential (50), wherein a vehicle can be parked by locking the parking gear (40); the planetary gear mechanism (4) comprises a sun gear (41), a planet gear (42), a planet carrier (43) and a ring gear (44); the first shaft (6) is connected between a rotor of the first electric motor (2) and the sun gear (41), the engine (1) is connected to the planet carrier (43), and a ring gear outer gear (60) meshing with the intermediate shaft gear (9) is provided on the ring gear (44); and the first engagement and disengagement device (3) is connected between the sun gear (41) and a stationary component and is configured to selectively engage or disengage the sun gear (41) with or from the stationary component. The hybrid power drive system can reduce EPB abrasion, thereby eliminating potential safety hazards during braking of the vehicle.
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