Control method for motor fault treatment of dual-motor power divided-flow type hybrid electric vehicle

A hybrid electric vehicle, processing and control technology, applied in the direction of electric vehicles, control devices, vehicle components, etc., can solve problems affecting the driving safety of vehicles, achieve the effects of improving safe driving, saving costs, and having a wide range of applications

Active Publication Date: 2019-01-29
江西鼎盛新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a hybrid electric vehicle using a dual-motor power-split hybrid transmission, when the motor connected to the brake fails during high-speed driving, the method of directly clearing the output torque of the entire vehicle is generally adopted, and the high voltage is applied when the vehicle is close to a standstill. However, in this way, the whole vehicle will have no torque output during the process from motor failure to vehicle parking, which will affect the driving safety of the vehicle.

Method used

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  • Control method for motor fault treatment of dual-motor power divided-flow type hybrid electric vehicle
  • Control method for motor fault treatment of dual-motor power divided-flow type hybrid electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0017] A dual-motor power-split hybrid electric vehicle motor fault handling control method, the structure diagram of the hybrid transmission device used in the hybrid electric vehicle is shown in figure 1 As shown, its main components include: engine 1, torsional shock absorber 2, first motor MG1, second motor MG2, power split gear mechanism that is double planetary row 3, first brake B1, second brake B2, engine 1 through The torsional damper 2 is connected with the planet carrier of the double planetary row 3, the small sun gear S1 of the double planetary row 3 is connected with the first motor MG1, the large sun gear S2 of the double planetary row 3 is connected with the second motor MG2, and the first brake B1 is connected to the planet carrier of the double planetary row 3, the second brake B2 is coaxially connected with the rotor of the first motor MG1, the ring gear of the double planetary row 3 meshes with the gear 4 of the final reducer, and the double planetary row 3 ...

Embodiment 2

[0024] A dual-motor power-splitting hybrid electric vehicle motor fault handling control method, its steps are basically the same as the steps of the dual-motor power-splitting hybrid electric vehicle motor fault processing control method in Embodiment 1, the difference is: step S1 The default value A in step S2 takes a value of 1500rpm, the engine speed critical threshold value B in step S2 takes a value of 800rpm, the SOC lower limit value C in step S3 takes a value of 5%, and the vehicle speed threshold D in step S3 takes a value of It is 12km / h.

Embodiment 3

[0026] A dual-motor power-splitting hybrid electric vehicle motor fault handling control method, its steps are basically the same as the steps of the dual-motor power-splitting hybrid electric vehicle motor fault processing control method in Embodiment 1, the difference is: step S1 The preset value A in step S2 takes a value of 1200rpm, the engine speed critical threshold value B in step S2 takes a value of 750rpm, the SOC lower limit value C in step S3 takes a value of 8%, and the vehicle speed threshold D in step S3 takes a value of It is 8km / h.

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Abstract

The invention provides a control method for motor fault treatment of a dual-motor power divided-flow type hybrid electric vehicle. The control method for motor fault treatment of the dual-motor powerdivided-flow type hybrid electric vehicle comprises the steps that firstly, the output torque gradient of a fault motor is controlled to reduce to 0, the rotating speed of the fault motor is controlled by adjusting the rotating speed of an engine, and until an absolute value of the rotating speed of the fault motor is less than a presser value A; then a brake connected with the fault motor is locked, so that the rotating speed of the fault motor is enabled to be 0, and a whole vehicle controller controls and adjusts another normal motor and the engine to realize while vehicle torque output; and when the rotating speed of the engine is less than or equal to a critical threshold value B of the rotating speed of the engine, the engine is controlled to stop oil injection and ignition, the another normal motor is controlled to realize the whole torque output and reversed towing speed adjustment of the engine, if power battery capacity is less than or equal to an SOC lower limiting value C,the whole output torque is eliminated, and the vehicle stops gradually. The control method for motor fault treatment of the dual-motor power divided-flow type hybrid electric vehicle is simple and feasible, and can improve safety of vehicle driving.

Description

technical field [0001] The invention relates to the control field of a hybrid electric vehicle, in particular to a motor fault processing and control method of a dual-motor power split type hybrid electric vehicle. Background technique [0002] When a hybrid electric vehicle is running, especially at a high speed, if a motor fault occurs as a major fault, the vehicle will generally take corresponding fault handling and control measures at this time. For a hybrid electric vehicle using a dual-motor power-split hybrid transmission, when the motor connected to the brake fails during high-speed driving, the method of directly clearing the output torque of the entire vehicle is generally adopted, and the high voltage is applied when the vehicle is close to stationary. However, in this way, the whole vehicle will have no torque output during the motor failure to the vehicle parking process, which will affect the driving safety of the vehicle. Contents of the invention [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L3/00
CPCB60L3/0061B60L2240/421B60L2240/423
Inventor 董恩源钟发平程辉军王晨
Owner 江西鼎盛新材料科技有限公司
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