Hybrid power system and driving method thereof

Abstract

The invention discloses a hybrid power system and a driving method thereof. The hybrid power system comprises an engine, wheels, a coupler, a first motor, a second motor, a first clutch, a second clutch, a first epicyclic gear train, a second epicyclic gear train and a brake. The hybrid power system is advantaged in that characteristics of the engine and the motors are utilized, optimal performance and oil consumption are achieved through two-stage planetary gear speed changing to drive the vehicle, moreover, the structure is simple; the gearbox and the motors are modularized; the double motors and a double planet row are adopted, through different combinations of two clutches and one brake, stable torque change can be achieved, the change range is wide, adaptability is high, and the structure is simple; during gear shifting, power is not completely interrupted, and the device is suitable for special-purpose vehicles with complex operation conditions.

Description

technical field [0001] The invention belongs to the field of hybrid power system development, and in particular relates to a hybrid power system and a driving method thereof. Background technique [0002] At present, vehicle emissions and energy consumption have become a worldwide problem. As the environmental protection measures of countries around the world become more and more stringent, there are more and more alternatives to fuel engine vehicles, such as hydrogen energy vehicles, fuel cell vehicles, and hybrid vehicles. etc.; at present, only hybrid electric vehicles are the most practical and commercially operated models. Hybrid electric vehicles with low emission and low energy consumption have become one of the mainstreams in the development of the current automobile industry. The key to hybrid electric vehicles is the hybrid power system, and its performance is directly related to the overall performance of hybrid electric vehicles. [0003] Hybrid power means that...

AI Technical Summary

Problems solved by technology

[0004] After more than ten years of development, the hybrid system assembly has developed from the original discrete structure of the engine and motor to the integrated and modular structure of the engine, motor and gearbox; if a three-stage planetary row is considered, the torque range is wide, but the structure is too large Complicated and large in size, it is not suitable for low-cost special-purpose vehicles, and the traditional two-stage planetary row hybrid system is not suitable for special-purpose vehicles with complex operating conditions because the power will be interrupted due to gear shifting

In short, some of the existing hybrid systems have too complex structures, some have low fuel economy ratios, some have small torque range coverage, and some shift power will be interrupted, which cannot fully meet the needs of special markets.

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