A tandem hybrid powertrain and a vehicle including the hybrid powertrain

Abstract

The present invention provides a parallel hybrid powertrain system and a vehicle including the hybrid powertrain system to increase motor output torque. A tandem hybrid pow system includes a planetaryrow, the planetary row has three power inputs and one power output, A hybrid powertrain also includes an engine connected to corresponding transmissions of the three power inputs, first motor and a second motor, An engine output shaft, a first electric machine output shaft and a second electric machine output shaft are arranged off-axially, a hybrid power system includes an engine locking mechanism for locking power inputs corresponding to the engine, and a transmission is provided between at least one of the first electric machine and the second electric machine and a power input corresponding to a planetary row. The gearbox can change the high speed of the motor to the low speed, the low torque of the motor to the high torque, increasing the torque input to the planetary row of motors.

Description

technical field [0001] The invention relates to a series hybrid power system and a vehicle including the hybrid power system. Background technique [0002] Parallel hybrid systems have huge performance advantages over series hybrid systems and parallel hybrid systems. The current hybrid power system mainly uses a planetary mechanism as a power splitting device. [0003] An invention patent with an application publication date of November 16, 2016 and an application publication number of CN106114185A discloses a hybrid power coupling transmission. The transmission (power system) includes a planetary row, and the planetary row has three power input ends. and a power output end, the three power input ends are respectively the input end of the sun gear, the input end of the ring gear and the input end of the planet carrier, and the power output end is connected with a power output shaft. The power system also includes an engine, a first motor, and a second motor that are conne...

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned power system, when the drive motor works to provide power for the power system, since the drive motor is directly connected to the output shaft of the planetary row through the gear, the torque value input by the drive motor to the planetary row is a certain value. In order to improve the output of the planetary row end torque, it needs to be equipped with a drive motor with a larger output torque, which increases the cost of the drive motor

Moreover, the ratio of the rotational speed between the driving motor and the output shaft of the planetary row is a fixed value, and the ratio of the torque is also a fixed value, and the driving motor cannot adapt to the

When the power system is in the engine drive mode, the engine will drive one of the power input ends of the planetary row to rotate. Since the drive motor is directly connected to the output shaft of the planetary row through gears, the output shaft of the planetary row will drive the drive motor to rotate with it, and there is an electromechanical conversion , reducing the energy utilization rate of the power system

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