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Dual-motor power system, gear shifting method and electric automobile

A technology of power system and shifting method, applied in electric vehicles, electric power units, power units, etc., can solve the problems of inconvenient shifting, power interruption, poor ride comfort, etc., to prevent sudden stop and prevent power interruption. Effect

Inactive Publication Date: 2015-11-25
华英汽车集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the transmission of electric vehicles, the manual transmission power system has the advantages of high efficiency, simple structure and low cost, but it is inconvenient to shift gears and the driver's operation is labor-intensive
So the automatic transmission system appeared, but although the early automatic transmission system solved the problems of inconvenient shifting and high labor intensity, it had the disadvantages of low efficiency, complex structure and high price.
[0003] Although the DCT (Double Clutch Transmission) has high efficiency and no power interruption during the shifting process, the structure is still complicated and the price remains high.
AMT has high efficiency, simple structure, and low cost, but power interruption occurs during shifting, resulting in poor ride comfort

Method used

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  • Dual-motor power system, gear shifting method and electric automobile
  • Dual-motor power system, gear shifting method and electric automobile

Examples

Experimental program
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Embodiment 1

[0029] Please refer to figure 1 , figure 1 It is the dual-motor power system provided by Embodiment 1 of the present invention.

[0030] This embodiment provides a dual-motor power system, which is used to provide power for an electric vehicle, and prevents the gears of the electric vehicle from being connected well when shifting gears, so that the gears will not be broken. The dual-motor power system includes a first drive motor 1 And the second drive motor 2, the first drive motor 1 and the second drive motor 2 are respectively connected to the first speed changer 3 and the second speed changer 4, and the first speed changer 3 and the second speed changer 4 are connected to the first speed changer 4 simultaneously. A clutch 5 and a second clutch 6, the first clutch 5 and the second clutch 6 are connected to the differential 7 at the same time; it should be noted that the first drive motor 1, the second drive motor 2, the second drive motor A speed changer 3, a second speed...

Embodiment 2

[0034] This embodiment provides an electric vehicle, which includes the dual-motor power system described in Embodiment 1, including a vehicle body and wheels 9, and the controller 8 is electrically connected to an accelerator pedal and a brake pedal.

[0035] The accelerator pedal or the brake pedal transmits the acceleration or deceleration signal to the controller 8, and the controller 8 processes the acceleration or deceleration signal and feeds it back to the motor controller for controlling the drive motor to realize the acceleration and deceleration actions of the drive motor. At the same time, when any one of the drive motors is accelerating or decelerating, the speed of the other one will not change, so as to prevent power interruption and a short pause of the electric vehicle. When the driving motor finishes accelerating or decelerating, the motor controller will send the speed of the driving motor to the controller 8 to update the speed of the driving motor in real t...

Embodiment 3

[0038] Please refer further figure 2 , figure 2 It is a flow chart of the gear shifting method provided by Embodiment 3 of the present invention.

[0039] This embodiment discloses a method for shifting gears of a dual-motor power system, which is used in the electric vehicle described in Embodiment 2, including the following steps:

[0040] S101. The controller 8 receives the gear up / down signal of the electric vehicle, and converts the gear up / down signal into a pulse signal and sends it to any one of the first drive motor 1 and the second drive motor 2. In this embodiment, the control The device 8 sends the gear up and down signal to the first drive motor 1;

[0041] S102. After the first drive motor 1 receives the gear position information, it judges whether the shift condition is met according to the speed of the electric vehicle, and feeds back the timely gear position information of the drive motor to the controller 8 for gear position verification;

[0042] S103, ...

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Abstract

The invention relates to the technical field of electric automobiles, in particular to a dual-motor power system used for speed changing. The system comprises a first driving motor and a second driving motor. The first driving motor and the second driving motor are connected with a first speed changer and a second speed changer respectively, the first speed changer and the second speed changer are connected with a first clutch and a second clutch respectively, and the first clutch and the second clutch are connected with a differential mechanism. The first driving motor, the second driving motor, the first speed changer, the second speed changer, the first clutch and the second clutch are controlled by a controller. Power interruption in gear shifting can be prevented, and a comfortable feeling is provided for a driver and passengers. The invention further provides an electric automobile and a gear shifting method. Power interruption in gear shifting can be prevented.

Description

technical field [0001] The invention relates to the technical field of electric vehicles, in particular to a dual-motor power system for speed change, an electric vehicle with the dual-motor power system and a shifting method. Background technique [0002] Due to the increasingly tense global energy sources, electric vehicles with high efficiency, energy saving and environmental protection have become the trend of future automobile development. Among electric vehicle transmissions, the manual transmission power system has the advantages of high efficiency, simple structure, and low cost, but it is inconvenient to shift gears and the driver's operation is labor-intensive. So the automatic transmission system appeared, but although the early automatic transmission system solved the problems of inconvenient shifting and high labor intensity, it had the disadvantages of low efficiency, complex structure and high price. [0003] The DCT (Double Clutch Transmission dual clutch tr...

Claims

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Application Information

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IPC IPC(8): B60K1/02B60L15/32
Inventor 甘胜泉
Owner 华英汽车集团有限公司
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