Planet coupled hybrid system for caterpillar and control method for same

Abstract

The invention discloses a planet coupled hybrid system for a caterpillar and a control method for the same, and belongs to the technical field of hybrid vehicle drive. The system comprises a generator; the generator is connected with an integrated controller through a generator control unit, a vehicle-mounted battery pack is connected with the integrated controller through a battery management system, and driving motors are connected with the integrated controller through motor controllers; the motor controllers are connected with the vehicle-mounted battery pack; an output shaft of the generator is connected with a central horizontal axis through an electric control clutch and a main reducer in turn; two ends of the central horizontal axis are connected with a gear ring respectively; planet carriers are connected with caterpillar track driving wheels through lateral transmission mechanisms; sun gears are connected with output shafts of the driving motors through gears; the central horizontal axis is provided with a first electric control brake; and the sun gears on the two sides are provided with a second electric control brake and a third electric control brake. According to the control method, the integrated controller calculates vehicle demand power in real time according to a speed feedback signal and an accelerator pedal signal, and detects the remained capacity of the battery to control the switching of work modes of the hybrid system.

Description

technical field [0001] The invention belongs to the field of drive technology of hybrid vehicles, in particular to a planetary coupling hybrid system for crawler vehicles and a control method thereof. Background technique [0002] The application of hybrid electric transmission technology in tracked vehicles has significant technical advantages, which can not only improve fuel economy, but also help to improve vehicle dynamics; Due to the current power density of electric motors, only electric motor drive cannot meet the torque and speed requirements of the entire driving condition at the same time. Therefore, it is necessary to add a set of two-speed transmission or adopt multi-motor coupling, which not only makes the structure complicated, the control is cumbersome, but also reduces the reliability of the system. [0003] In addition, during the turning process of the tracked vehicle, the outer track needs to output relatively large power. Due to the independent drive str...

AI Technical Summary

Problems solved by technology

Just to meet the steering requirements, the motors on both sides have to be designed very large. At the same time, this also greatly restricts the steering performance of the tracked vehicle. Due to the limitation of the peak power of the motors, the current series hybrid motors are driven independently The tracked vehicle of the structure can basically only turn at a very low speed (for example, below 15km / h), which seriously reduces the average speed of the vehicle during operation and affects the mobility of the vehicle.

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