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Gear-shifting control method for electric automobile and motor speed adjusting method based on gear-shifting

A technology of electric vehicles and control methods, which is applied in the field of vehicles, can solve problems such as over-regulation process and motor overshoot without specifying in detail, and achieve the effects of improving ride comfort and comfort, ensuring ride comfort, and reducing power interruptions

Active Publication Date: 2015-05-13
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the related art, only the speed regulation process of upshifting and downshifting is considered. Since the electric vehicle has power interruption when the motor shifts gears in the pure electric (EV) mode, in fact, the shifting time needs to be considered when the whole vehicle is running. In addition, the motor is prone to overshoot during the speed regulation process, and the related technology has not explained the regulation process in detail.

Method used

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  • Gear-shifting control method for electric automobile and motor speed adjusting method based on gear-shifting
  • Gear-shifting control method for electric automobile and motor speed adjusting method based on gear-shifting
  • Gear-shifting control method for electric automobile and motor speed adjusting method based on gear-shifting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0176] like image 3 As shown, the engine 4 is connected to the input end 23d of the dual clutch 2d, the first output end 21d of the dual clutch 2d is connected to the first input shaft 11, the second output end 22d of the dual clutch 2d is connected to the second input shaft 12, The input end 23d of the clutch 2d and the first output end 21d and the second output end 22d of the double clutch 2d may be disconnected at the same time, or the input end 23d of the double clutch 2d may be connected with the first output end 21d and the second output end of the double clutch 2d. One of the two output terminals 22d is engaged, or the input terminal 23d of the dual clutch 2d may be simultaneously engaged with the first output terminal 21d and the second output terminal 22d of the dual clutch 2d.

[0177] The second input shaft 12 is a hollow shaft structure, the first input shaft 11 is a solid shaft, the second input shaft 12 is coaxially sleeved on the first input shaft 11, and a par...

Embodiment 2

[0238] like Figure 4 As shown, the powertrain 100 in this embodiment is image 3 The main differences of the drivetrain 100 shown in are at the reverse intermediate gear 72, the intermediate idler 73 and the reverse synchronizer 74c. In this embodiment, the reverse idler gear 72 and the idler idler 73 are adjacent to the second output shaft 22, and the reverse gear synchronizer 74c is provided on the idler idler 73 and used to engage the reverse idler gear 72. For the rest it is possible to image 3 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here.

Embodiment 3

[0240] like Figure 5 As shown, the powertrain 100 in this embodiment is Figure 4 The main difference in the drivetrain 100 shown in is the configuration of the intermediate idler gear 73 . In this embodiment, the intermediate idler gear 73 is configured as a double gear and has gear portions 731 , 732 , wherein one gear portion 731 meshes with the second gear driving gear (ie, with the gear driving gear on the one of the input shafts) ), the other gear part 732 meshes with the first gear 31 of the motor power shaft. For the rest it is possible to Figure 4 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here.

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Abstract

The invention discloses a gear-shifting control method for an electric automobile. The gear-shifting control method comprises the following steps: S11, wherein when a request gear released by a motor controller is consistent with a target gear released by a drive control unit, an electrical generator is controlled to conduct a first torque unloading; S12, wherein when the unloading is completed, the drive control unit controls a motor power shaft synchronizer to disconnect, and when the electrical generator is at neutral position, the motor controller calculates the target shift revolving speed of the electric generator and controls the electrical generator to conduct the torque loading, and when the revolving speed reaches a preset motor speed range, the motor controller controls the electric generator to conduct a second torque unloading; S13, wherein when the unloading is completed, the drive control unit controls the motor power shaft synchronizer to initiate combination; S14, wherein the motor controller judges the current gear of the electric generator released by the drive control unit is the request gear and confirms successes of the electrical generator gear-shifting. By means of the gear-shifting control method for the electric automobile, evenness and comfort of the finished automobile can be improved. The invention further discloses a motor speed adjusting method of an electrical automobile.

Description

technical field [0001] The present invention relates to the technical field of vehicles, in particular to a method for controlling a gear shift of an electric vehicle, and a method for adjusting the rotational speed of a motor generator based on the gear shifting of the electric vehicle. Background technique [0002] With the development of automobile technology, the control of all aspects of the power automobile has become more and more perfect, but there are still some problems. Among them, in the aspect of shifting control of a power vehicle, the related art discloses a shifting control method for an electric vehicle with an AMT (Automated Mechanical Transmission, electronically controlled mechanical automatic transmission) gearbox, such as figure 1 As shown, the shift control method includes the following steps: [0003] S1': HCU (Hybrid Control Unit, hybrid vehicle controller) determines whether it receives the shift information sent by TCU (Transmission Control Unit, ...

Claims

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Application Information

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IPC IPC(8): B60W30/19B60W20/00B60W10/06B60W10/08B60W10/11F16H61/02B60L15/20
CPCB60W10/06B60W10/08B60W10/11B60W20/00B60W30/19B60W2710/08B60W2710/083B60W2710/1005F16H61/0204Y02T10/62Y02T10/72
Inventor 杨冬生廉玉波张金涛罗红斌
Owner BYD CO LTD
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