Dual-motor high-low speed interval power system

Abstract

The invention discloses a dual-motor high-low speed interval power system. A first motor drives a planetary mechanism; the planetary mechanism and / or a second motor drive / drives a first input gear; the first input gear drives a differential mechanism or a drive axle to output power; power output of a vehicle is achieved by superposing the second motor on the basis that the first motor drives the planetary mechanism, the double motors can work independently to achieve multi-speed-stage driving, the acceleration performance can be guaranteed through combined complementation, power arrangement ismore flexible, energy distribution is more reasonable, and the energy saving performance and the power performance are both considered.

Description

technical field [0001] The invention belongs to the field of vehicle transmission, and in particular relates to a transmission system in which dual motors are jointly driven to generate high-low speed and wide-range output power. Background technique [0002] Pure electric vehicles are an important direction for the development of my country's automobile industry. In the past ten years, not only traditional car companies have continuously launched pure electric vehicles, but many new energy car companies have also joined the competition. The technical threshold of pure electric vehicles is lower than that of traditional fuel vehicles. After all, the core of traditional fuel vehicles is the engine and transmission, and the core technology and patent barriers of these two have been firmly controlled by foreign car companies. [0003] At the beginning, the driving scheme of pure electric vehicles was single motor + single-stage transmission. The advantages of this scheme are ea...

AI Technical Summary

Problems solved by technology

But the disadvantages are also very prominent: First, the single-stage transmission makes the motor always run at a fixed speed ratio when the car starts to the highest speed, and the output torque of the motor in the middle and rear stages of the performance drops sharply with the increase of the speed, causing the car to run at a high speed. Acceleration is weak when driving at high speed, and the entire electric drive system is in a high-load state, and its energy consumption is more serious than that of fuel vehicles

Blindly improving the performance of the motor to ensure the high-speed performance of the car often leads to excess performance of the electric drive system, which increases the cost and has no obvious effect. In view of the above phenomena, configuring a dual-motor electric drive system is undoubtedly a better direction

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