Electromechanical compound transmission device of hybrid vehicle

Abstract

The present invention relates to an electromechanical compound transmission device of a hybrid vehicle. The electromechanical compound transmission device of the hybrid vehicle comprises an engine, a front drive composed of a bevel gear drive and a speed increase planetary row, a power coupling mechanism, a transmission mechanism as well as an electric motor / generator M1 and an electric motor / generator M2. The power coupling mechanism is composed of a single planetary row, a brake Z1, a brake Z2 and a clutch C1, the electric motor / generator M1 and the electric motor / generator M2 are connected to a ring gear and a sun gear of the power coupling mechanism, the transmission mechanism consists of two planetary rows and three control elements, which refer to a first-gear brake Z4, a second-gear brake Z3 and a third-gear clutch C2, the power of the engine is input through a drive bevel gear, the power of the electromechanical compound transmission is output through the transmission mechanism, the transmission mechanism is a two-degree-of-freedom planetary mechanism, and different gears can be switched to by combining one control element according to different road conditions. Multiple working conditions, such as series connection, parallel connection, series-parallel connection, pure electric transmission and mechanical transmission, can be realized.

Description

technical field [0001] The invention relates to a hybrid electric vehicle power transmission system, which is especially suitable for large-tonnage, heavy-duty, off-road hybrid electric vehicles. Background technique [0002] Hybrid vehicles use electric motors and engines as power devices at the same time. Through energy storage devices (power battery packs, etc.) and control systems, the two power devices are organically coordinated to achieve optimal energy distribution, low energy consumption, low emissions and high performance. It combines the advantages of fuel vehicles and electric vehicles, and is the most practical low-fuel consumption and low-emission vehicle for development today. [0003] At present, the transmission system structures of hybrid electric vehicles include series, parallel and hybrid. Hybrid power transmissions are widely used in hybrid vehicles. The THS system of Toyota's Prius is a typical successful case of hybrid hybrid vehicles, but its str...

AI Technical Summary

Problems solved by technology

The THS system of Toyota's Prius is a typical successful case of hybrid hybrid vehicles, but its structure is more suitable for low-power vehicles; GM has designed a dual-mode hybrid drive system for high-power hybrid vehicles such as buses and SUVs; but it is suitable for Hybrid powertrains for off-road vehicles with high power requirements and complex usage conditions are still rare

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