Multi-mode dual-motor drive system and its drive mode

Abstract

The invention discloses a multimode dual-motor driving system and a driving mode thereof. The multimode dual-motor driving system is characterized in that an output shaft of a first motor is connected with a first input shaft of a speed changing box; an output shaft of a second motor is connected with a second input shaft of the speed changing box; the first input shaft of the speed changing box is connected with the second input shaft of the speed changing box by a clutch; the speed changing box is internally provided with four gear structures; a first-gear gear set and a third-gear gear set are arranged on the second input shaft of the speed changing box; a second-gear gear set and a fourth-gear gear set are arranged on the first input shaft of the speed changing box; an odd-gear synchronizer is arranged between the first-gear gear set and the third-gear gear set; and an even-gear synchronizer is arranged between the second-gear gear set and the fourth-gear gear set. The invention has the advantages that by the mode, multimode gear shifting can be realized, and the implementation is easy; by combined control with driving of two motors, the optimized combination of the power performance and the economic performance can be realized; and gear shifting is realized by switching control of two motors, no power failure occurs and the comfort is good.

Description

technical field [0001] The invention relates to the field of power drive, in particular to a multi-mode dual-motor drive system and its drive method. Background technique [0002] With the increasingly serious problems of energy shortage and environmental pollution, electric vehicles are generally considered to be the direction of the development of the automobile industry at home and abroad. Their large-scale promotion and application can not only save energy and reduce emissions, but also improve people's quality of life. It is an important measure to solve the problem of over-reliance on oil and solve the national energy security. [0003] The existing pure electric electric drive system scheme is divided into two types according to the speed change scheme. One is the drive system using a single-stage reduction gear, without a gearbox, and a single-stage reduction gear is used to achieve deceleration. Step speed regulation, but because there is no speed change function, ...

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Problems solved by technology

[0003] The existing pure electric electric drive system scheme is divided into two types according to the speed change scheme. One is the drive system using a single-stage reduction gear, without a gearbox, and a single-stage reduction gear is used to achieve deceleration. Step speed regulation, but because there is no speed change function, it is difficult to balance the contradiction between acceleration time and maximum vehicle speed, and it is difficult to optimize the working range of the motor to improve the efficiency of the drive system when running in common conditions; another solution is to use traditional multi- The driving scheme of the high-speed transmission, which can solve the above problems well, but makes the structure of the driving system complicated, the driving efficiency is reduced, and the cost is increased

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