Driving device and method and vehicle

Abstract

The embodiment of the invention provides a driving device and method and a vehicle. The device comprises a first motor assembly, a speed reduction transmission assembly, a differential mechanism assembly, a driving wheel assembly and a second motor assembly connected with the differential mechanism assembly, the speed reduction transmission assembly comprises a clutch; when the first motor assembly is in a working state, the clutch is in a closed state; and when the first motor assembly is in a non-working state, the clutch is in a disconnected state. According to the embodiment of the invention, power can be provided for the driving wheel assembly through the two motor assemblies, the dragging loss and the transmission loss of the driving device are reduced, and the output efficiency of the driving device is improved.

Description

Technical field [0001] The present invention relates to the field of vehicle technology, and in particular to a driving device, a driving method and a vehicle. Background technique [0002] With the continuous development of the vehicle industry, electric vehicles have become one of the means of transportation for more and more people. [0003] Under a certain power configuration, power consumption determines the cruising range of an electric vehicle; similarly, under a specified cruising range, power consumption determines the amount of power that an electric vehicle needs to configure. Generally, the power consumption of the drive system of electric vehicles accounts for more than 90% of the total vehicle power consumption. When the drive system drives the vehicle, part of its power consumption is converted to overcome the rolling resistance of the wheels and the wind resistance of the body, and part of it is consumed due to the loss of the drive motor (including the cont...

AI Technical Summary

Problems solved by technology

[0006] The main problem existing in the existing technology is: the complex working conditions of the vehicle require the driving system to have sufficient driving torque and power, the high-efficiency zone of the driving motor is generally in the medium torque zone, and the main operating conditions of the vehicle only require the output of the driving system. Low torque and power, so most of the operating points of the driving motor are distributed in the area of ​​low torque and low efficiency, and the coincidence degree with the high efficiency area of ​​the motor is small

For the reducer, also in the low torque area, the output power is small, the mechanical transmission loss accounts for a large proportion, and the efficiency is low

Therefore, the comprehensive efficiency of the driving system is not high and the power consumption is high

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