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Hybrid electric vehicle, its control method and power transmission system

A hybrid vehicle and power transmission system technology, applied in hybrid vehicles, motor vehicles, power units, etc., can solve problems affecting the economy of the whole vehicle, and achieve the effect of improving the economy of the whole vehicle and the economy of the whole vehicle.

Active Publication Date: 2018-06-26
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, in related technologies, when the vehicle speed is low, the engine speed is related to the vehicle speed due to the mechanical connection between the engine and the wheels. At this time, if the engine sends out additional torque to drive the motor to generate electricity, the engine and motor will work at a lower efficiency. Interval, affecting vehicle economy

Method used

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  • Hybrid electric vehicle, its control method and power transmission system
  • Hybrid electric vehicle, its control method and power transmission system
  • Hybrid electric vehicle, its control method and power transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0168] 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.

[0169] The second input shaft 12 is a hollow shaft structure, the first input shaft 11 is a...

Embodiment 2

[0230] 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

[0232] 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 control method for a hybrid electric vehicle, and the control method comprises the steps that a working mode of the hybrid electric vehicle is determined, wherein the working mode of the hybrid electric vehicle is a pure electric mode or a hybrid power mode; when the working mode of the hybrid electric vehicle is the hybrid power mode, an SOC of a power battery of the hybrid electric vehicle, a shift position of an engine and a speed of the hybrid electric vehicle are detected; and double clutches are controlled according to the SOC of the power battery, the shift position of the engine and the speed of the hybrid electric vehicle, so that a first electric generator can be driven by the engine to generate electricity. The control method for the hybrid electric vehicle disclosed by the invention can increase efficiency of the generator and the engine and can guarantee economical efficiency of the whole vehicle when the hybrid electric vehicle stays under low-speed working conditions and generates the electricity. The invention also discloses a power transmission system of the hybrid electric vehicle and the hybrid electric vehicle with the power transmission system.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a control method of a hybrid electric vehicle, a power transmission system of the hybrid electric vehicle and the power transmission system. Background technique [0002] With the development of automobile technology, the control of all aspects of power vehicles is becoming more and more perfect, but there are still some problems. Among them, in terms of power transmission of power vehicles, a parallel hybrid electric vehicle power transmission system is disclosed in the related art. The power transmission system includes: an internal combustion engine, a hydraulic automatic transaxle, a controller, and a motor; The hydraulic automatic transaxle drives the wheels; the drive shaft of the motor is coupled with the final reducer of the hydraulic automatic transaxle; when driving and generating electricity, the engine crankshaft drives the pump wheel of the hydraulic automatic tr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60K6/50B60K6/365B60W10/02B60W10/06B60W10/08B60W20/00
CPCY02T10/62
Inventor 廉玉波阮鸥陈昊崔俊博黄鹏王品
Owner BYD CO LTD