Hybrid drive system for hybrid vehicle and hybrid vehicle

Abstract

The invention provides a series-parallel-type driving system for a hybrid power vehicle and further provides the hybrid power vehicle provided with the series-parallel-type driving system. The series-parallel-type driving system comprises an engine, a planetary row, a clutch device, a first motor, a second motor, a sun wheel brake and a planetary frame one-way clutch. The planetary row is composed of a sun wheel, a planetary wheel, a planetary frame and an inner gear ring; the clutch device is arranged between an output shaft of the engine and a planetary frame shaft of the planetary frame; the first motor is connected with the sun wheel in a transmission mode; one end of a motor shaft of the second motor is connected with the inner gear ring in a transmission mode, and the other end of the motor shaft of the second motor is connected with a transmission shaft of the vehicle; the sun wheel brake is used for braking or releasing the sun wheel; and the planetary frame one-way clutch is arranged between the planetary frame shaft and a planetary row shell of the planetary row.

Description

technical field [0001] The invention relates to hybrid technology, in particular to a hybrid drive system for a hybrid vehicle and a hybrid vehicle with the hybrid drive system. Background technique [0002] At present, hybrid electric vehicles (Hybrid Electric Vehicle, HEV) have become a focus of automobile research and development due to their advantages such as energy saving and low emissions, and more and more hybrid electric vehicles have come out, such as passenger cars using hybrid technology or commercial vehicles. [0003] Chinese patent application 201420036654.5 provides a planetary row hybrid power system of a hybrid vehicle, which includes an engine 1', a planetary row 3', a first motor 5' and a second motor 6', and the engine 1' passes through a torsional shock absorber 2' is connected to the planet carrier 32' of the planetary row 3', the first motor 5' is connected to the sun gear 31' of the planetary row 3', and one end of the second motor 6' is directly co...

AI Technical Summary

Problems solved by technology

[0004] However, in the Chinese patent application 201420036654.5, the engine 1' and the planet carrier 32' are coaxially and directly connected through the torsional shock absorber 2', and cannot be separated. decrease, but the engine speed always has a fixed speed ratio relationship with the vehicle drive shaft. When the vehicle starts from 0 speed, the corresponding engine speed needs to increase from 0. Obviously, the engine cannot intervene at this time, so when the high-voltage power supply fails or the second motor fails When the motor fails or both motors fail, the vehicle cannot be driven by the engine to start, and the system reliability is reduced

[0005] In addition, pure electric starting can only rely on the second motor for driving. Although the addition of a two-speed transmission reduces the torque demand of the second motor, the first motor cannot participate in the driving and cannot be used effectively. The same is true for energy recovery.

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