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Gear shifting method and device and vehicle

A gear shifting method and vehicle technology, applied in the field of shifting methods, devices and vehicles, can solve problems such as motor overheating, vehicle slippage, power interruption, etc., and achieve the effect of avoiding sudden power interruption and preventing motor temperature from being too high.

Pending Publication Date: 2022-06-24
BEIQI FOTON MOTOR CO LTD
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  • Abstract
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Problems solved by technology

[0005] The embodiment of the present application provides a gear shifting method, device and vehicle to solve the problems of sudden power interruption and vehicle slippage caused by overheating of the vehicle motor

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  • Gear shifting method and device and vehicle
  • Gear shifting method and device and vehicle
  • Gear shifting method and device and vehicle

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Embodiment Construction

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0054] At present, the new energy electric vehicle using the permanent magnet synchronous motor + AMT (Automated Mechanical Transmission) solution has multiple advantages in terms of cost, weight and efficiency in the electric drive system. Among them, the AMT transmission is improved on the basis of the traditional manual gear transmission, which not only has the advantages of automatic transmission of ordinary automatic transmission, bu...

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Abstract

The embodiment of the invention provides a gear shifting method and device and a vehicle, the method is applied to an AMT gearbox controller, and the method comprises the steps that the current temperature of a motor is obtained; according to a preset motor temperature threshold value, a gear shifting mode corresponding to the current temperature is obtained; according to the gear shifting mode, a corresponding gear shifting curve is obtained; and gear shifting operation is executed based on the gear shifting curve, and a power system is controlled to complete corresponding power output. According to the embodiment of the invention, different gear shifting curves are provided for the AMT gearbox on the basis of scenes of different motor temperatures, so that the relationship between power output and the motor temperature is balanced, sudden motor power drop or automatic shutdown protection caused by too high motor temperature is prevented, and the safety of vehicle operation is improved.

Description

technical field [0001] The embodiments of the present application relate to the field of automobiles, and in particular, to a gear shifting method, device, and vehicle. Background technique [0002] At present, more and more new energy electric vehicles begin to use permanent magnet synchronous motor + AMT (Automated Manual Transmission) solution, which makes the electric drive system have multiple advantages such as cost, weight and efficiency. [0003] The current AMT shift strategy mainly considers the power, economy and drivability of the vehicle, and sets the shift curve of each gear according to the vehicle's maximum grade, acceleration performance and accelerator opening, and then considers the electric drive system ( Including the requirements of the high-efficiency area of ​​the motor, the motor controller and the transmission mechanism) and the smoothness of the vehicle driving are optimized to formulate the final shift curve. [0004] Under extreme conditions suc...

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Application Information

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IPC IPC(8): B60W30/19B60W40/00
CPCB60W30/19B60W40/00
Inventor 李兆琦张艳超方程刘健明李天睿
Owner BEIQI FOTON MOTOR CO LTD
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