Automobile hybrid power coupling system and hybrid power control method and device

Abstract

The invention relates to the technical field of automobiles and discloses an automobile hybrid power coupling system and a hybrid power control method and device; an engine of the coupling system is connected with a generator through a planetary row, and a driving motor is connected with a differential mechanism through a transmission device; the planetary row comprises three rotating elements, one of the three rotating elements is provided with a first brake, and the other two of the three rotating elements are respectively connected with the engine and the generator in a one-to-one correspondence mode; the planetary row is in transmission connection with the transmission device through the rotating element provided with the first brake; a second brake is arranged on an output shaft of the generator; and a third brake is arranged on the output shaft of the driving motor. Regulation of the speed ratio of the output shaft of the engine to the output shaft of the generator can be realized through the planetary row, so that the requirements for the dynamic performance and the economical efficiency of the automobile can be simultaneously met; moreover, the coupling system is compact in structure, and through the hybrid power control method and device, switchover between various working modes can be realized.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an automobile hybrid power coupling system and a hybrid power control method and device. Background technique [0002] The existing power system consists of an engine (internal combustion engine) and a transmission system consisting of a transmission, a differential and a drive shaft. Its function is to provide the vehicle with the driving power required to drive the wheels. Internal combustion engines have a range of speeds and torques, and they work best within a small range where either fuel consumption is minimized, harmful emissions are minimized, or both. However, the actual road conditions are ever-changing, not only in the speed of the driving wheels, but also in the torque required by the driving wheels. Therefore, it is the primary task of the transmission to realize the optimal speed and torque of the internal combustion engine, that is, the optimal state of powe...

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Problems solved by technology

However, this system requires two sets of independent subsystems, and the cost is high; the above-mentioned hybrid system can realize pure electric and hybrid driving modes through reasonable control of related power sources, but the system has many shafts and complex structure. The space layout requirements of the motor and transmission structure are high, the development and design costs are high, and the working mode of direct drive of the engine cannot be switched, so it is difficult to meet the higher requirements of users for hybrid vehicles

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