Single-planetary-line multi-mode hybrid power drive system

Abstract

The invention discloses a single-planetary-line multi-mode hybrid power drive system. The single-planetary-line multi-mode hybrid power drive system comprises an engine, a one-way clutch, a brake, a first motor, a planetary-line assembly, a reduction pinion, a second motor and a reduction differential system; the planetary-line assembly comprises a planetary carrier, a solar wheel and a gear ring,the planetary carrier is connected to the engine through the one-way clutch, the solar wheel is connected to the first motor and the brake, the gear ring is connected to the second motor through thereduction pinion, and the gear ring is connected to the reduction differential system to transmit power to automobile driving wheels. Through corresponding control, a power coupling mode with three gears can be achieved in a pure electric state, a parallel mode with the engine is realized in the pure electric state, and the reliability and energy consumption characteristic of the system are remarkably improved. The work efficiency of a vehicle on urban and highway conditions can be optimized and improved, and the fuel economy and dynamic property of the whole vehicle are further improved.

Description

technical field [0001] The invention belongs to the technical field of power transmission components, and in particular relates to a single-planet row multi-mode hybrid power transmission system. Background technique [0002] The two major crises of energy shortage and environmental pollution restrict the sustainable development of the current world. Under the call of the two world issues of "energy saving" and "environmental protection", in order to cope with the increasingly stringent fuel regulations, hybrid vehicles are the current solution to fuel economy. The best option for the problem. [0003] According to different powertrain configurations, hybrid electric vehicles are divided into series, parallel, hybrid and other modes. The hybrid hybrid vehicle, which combines the advantages of series and parallel, can realize the decoupling of the engine and vehicle speed, so that the engine can work in a high-efficiency area, and at the same time, part of the engine power i...

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Problems solved by technology

[0004] The conventional Toyota ECVT without clutch has achieved commercial success, but the pure engine limp function cannot be realized when the motor fails, and only the power and torque of one of the two motors can be used under pure electric conditions. The capacity of the other motor has not been brought into play. With the rise of PLUG-IN plug-in hybrid power, the proportion of pure electric working conditions and electrification is gradually increasing. Therefore, it is necessary to optimize the transmission of the system by adding clutches or brakes to the system. configuration, make full use of the performance of the motor and battery, and improve the energy consumption characteristics of the vehicle

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