Electronic infinite variable speed parallel type mixed power driving device

Abstract

The invention discloses an electronic stepless variable speed parallel type hybrid power driving device which comprises a counter-rotating double-rotor motor, a motor controller, a planetary mechanism, an accumulator set, a control unit ECU and a dead axle gear pair, wherein an input shaft of an engine is respectively connected with a sun wheel of the planetary mechanism and a gear ring by a power transmission mechanism formed by the counter-rotating double-rotor motor and the dead axle gear pair; at least one brake is connected with the sun wheel of the planetary mechanism and the gear ring; and the accumulator set is respectively electrically connected with the motor controller and the control unit ECU, and the motor controller is electrically connected with the counter-rotating double-rotor motor. The device has the advantages of compact structure, few power transmission parts and low transmission loss; the action of the brake determines different working modes, different modes have different speed ratios and torque output, the vehicle can select different modes to work according to actual power requirements, and the speed ratio range is greatly enlarged, therefore, the system can be suitable for various vehicle types with different requirements for speed ratio.

Description

technical field [0001] The invention relates to a power transmission and an automatic transmission system in a hybrid electric vehicle, in particular to a type of continuously variable parallel hybrid drive system and a design method thereof. technical background [0002] Due to the increasing awareness of environmental protection caused by energy and environmental problems, the requirements for energy saving and environmental protection of automobiles are getting higher and higher, but the related technologies of electric vehicles and fuel cell vehicles are still immature, making hybrid electric vehicles (HEV) more and more popular. Attracting people's attention, it has gradually become a development trend and is a hot topic in the current automotive field research. [0003] The method and structural form of hybrid electric vehicle power synthesis are directly related to the performance of the vehicle. At present, the structural forms of the hybrid electric vehicle power dr...

AI Technical Summary

Problems solved by technology

Among the various existing power transmission systems, the hydromechanical automatic transmission (AT) has the advantages of not cutting off the power shift, smooth starting, and the torque converter adapting to resistance, but it has complex structures and manufacturing process requirements. High, low transmission efficiency of hydraulic torque converter and other disadvantages; electromechanical automatic transmission (AMT) has the advantages of high transmission efficiency and large power capacity, but it is difficult to obtain the perfect transmission characteristics of continuously variable automatic transmission; due to continuously variable transmission The transmission (CVT) can continuously change the speed ratio, so that the car can achieve the best match between the engine and the motor operating point (best economy or best power match) according to the driver's operation intention under any working condition. Thereby effectively reducing emissions and improving the fuel economy, power and ride comfort of the vehicle. Therefore, hybrid electric vehicles based on continuously variable transmission have become the preferred solution

[0005] However, as far as some types of mechanical continuously variable transmissions (CVT) currently exist, because they are actually based on friction transmission, they have the ability to transmit torque and power and low efficiency, and the available range of gear ratios (that is, the ratio of the maximum speed ratio to the minimum speed ratio of the system) is quite limited and other shortcomings, so it is generally only suitable for small-displacement cars and motorcycles with small power and speed ratio ranges, or other vehicles that only need to transmit small power. use or occasion

Images