Hybrid electric vehicle and its reverse gear control method and power transmission system

A hybrid electric vehicle and power transmission system technology, which is applied to the layout of multiple different prime movers of hybrid electric vehicles and general-purpose power plants, and motor vehicles, and can solve problems such as poor economy, weak power, and economic impact , to achieve a good reversing experience and take into account the effect of power

Active Publication Date: 2018-09-11
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the low speed of the hybrid vehicle during the reversing process, the driving is also intermittent, and the related reversing method has the following disadvantages: the pure fuel-driven reversing method has poor economy and high emissions, and the clutch is in the position for a long time. Slip and grind, causing severe mechanical wear; pure electric drive reverse mode, power is weak, at the same time choose direct gear driving (speed ratio is small), the motor speed is small, the motor works in an uneconomical area, the economy will be low Affected to a certain extent; the reversing mode of hybrid drive needs to take into account the power coupling of different power sources and speed adjustment and shifting, and the control is relatively complicated

Method used

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  • Hybrid electric vehicle and its reverse gear control method and power transmission system
  • Hybrid electric vehicle and its reverse gear control method and power transmission system
  • Hybrid electric vehicle and its reverse gear control method and power transmission system

Examples

Experimental program
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Effect test

Embodiment 1

[0166] Such as figure 2 As shown, the engine 4 is connected with the input end 23d of the double clutch 2d, the first output end 21d of the double clutch 2d is connected with the first input shaft 11, the second output end 22d of the double clutch 2d is connected with the second input shaft 12, and the double clutch 2d is connected with 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 can be in disconnected state at the same time, or the input end 23d of the double clutch 2d can be connected with the first output end 21d and the second output end 21d of the double clutch 2d. One of the two output terminals 22d is engaged, or the input terminal 23d of the dual clutch 2d can be simultaneously engaged with the first output terminal 21d and the second output terminal 22d of the dual clutch 2d.

[0167] The second input shaft 12 is a hollow shaft structure, the first input shaft 11 is a...

Embodiment 2

[0228] Such as image 3 As shown, the power transmission system 100 in this embodiment and figure 2 The main differences of the drivetrain 100 shown in are at the reverse intermediate gear 72, the idler intermediate gear 73 and the reverse synchronizer 74c. In this embodiment, the reverse intermediate gear 72 and the intermediate idler gear 73 are adjacent to the second output shaft 22, and the reverse synchronizer 74c is disposed on the intermediate idler gear 73 and is used to engage the reverse intermediate gear. 72. For the rest it can be used with figure 2 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here.

Embodiment 3

[0230] Such as Figure 4 As shown, the power transmission system 100 in this embodiment and image 3 The main difference in the drivetrain 100 shown in is the configuration of the intermediate idler 73 . In this embodiment, the intermediate idler gear 73 is configured as a double gear, and has gear portions 731, 732, one of which gear portion 731 meshes with the second gear driving gear (that is, with the gear driving gear on the one of the input shafts). ), the other gear portion 732 meshes with the first gear 31 of the motor power shaft. For the rest it can be used with image 3 The power transmission system 100 in the embodiment is basically the same, and will not be repeated here.

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PUM

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Abstract

The invention discloses a reverse gear control method for a hybrid electric vehicle. The reverse gear control method for the hybrid electric vehicle comprises the following steps of judging a demand torque of the hybrid electric vehicle during reversing the hybrid electric vehicle; and controlling a power transmission system according to the demand torque of the hybrid electric vehicle so as to control the hybrid electric vehicle to run in a pure electric reverse gear mode or a hybrid reverse gear mode. Therefore, during controlling the reversing of the hybrid electric vehicle, power performance, economic efficiency and control difficulty can be all taken into account by using the control method so as to provide good reversing experience to users. The invention further discloses the power transmission system for the hybrid electric vehicle and the hybrid electric vehicle.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a reverse gear control method of a hybrid electric vehicle, a power transmission system of a hybrid electric vehicle and a hybrid electric vehicle. Background technique [0002] The reverse gear mode of the related hybrid electric vehicle includes motor driving through direct gear, motor driving through gear shifting and pure fuel driving mode, and also has hybrid driving mode and so on. Among them, the pure fuel-driven reversing method is relatively mature; the pure electric-driven reversing method is simple to control, easy to implement, and has better economy; the hybrid-driven reversing method has better power performance. [0003] However, due to the low speed of the hybrid vehicle during the reversing process, the driving is also intermittent, and the related reversing method has the following disadvantages: the pure fuel-driven reversing method has poor economy and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K6/36B60K6/547B60W20/10B60W30/18
Inventor 廉玉波阮鸥陈昊程华黄鹏王品
Owner BYD CO LTD
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