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Gear-shifting control method and device and electric car

A technology for electric vehicles and control methods, applied in electric vehicles, control devices, control drives, etc., can solve problems such as low efficiency, and achieve the effect of reducing consumption and improving utilization rate

Active Publication Date: 2017-12-01
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Embodiments of the present invention provide a shift control method, device, and electric vehicle to solve the problem that electric vehicles are in a low-efficiency state for a long time in the prior art

Method used

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  • Gear-shifting control method and device and electric car
  • Gear-shifting control method and device and electric car
  • Gear-shifting control method and device and electric car

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Embodiment Construction

[0062] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0063] According to an aspect of the embodiments of the present invention, a gear shift control method is provided, which is applied to a clutchless electric vehicle.

[0064] Among them, such as figure 1 As shown, the shift control method includes:

[0065] Step 101, obtaining the vehicle speed of the electric vehicle.

[0066] Wherein, the Vehicle Control Unit (VCU for short) obtains the vehicle speed of the electric vehicle in real time or...

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Abstract

The embodiment of the invention provides a gear-shifting control method and device and an electric car. The gear-shifting control method comprises the steps that the car speed of the electric car is obtained; according to the opened degree of an accelerator pedal and preset gear-shifting points, whether the car speed reaches the gear-shifting car speed is determined; if the car speed reaches the gear-shifting car speed, up-shifting or down-shifting of the current gear of the electric car is conducted through a motor controlled by a motor controller and a gearbox controlled by a gearbox controller. By adoption of the technical schemes, the opened degree of an accelerator and the car speed double parameters are applied to make a gear-shifting rule, the gear-shifting car speed is determined according to the different accelerator opened degrees and the highest efficiency value of a motor-gearbox system when the gearbox works at different gears, the electric car can be made to be in a high-power work state for a long time in the traveling process, energy consumption is reduced, and the energy utilization rate is increased.

Description

technical field [0001] The invention relates to the field of electric vehicles, in particular to a shift control method and device and the electric vehicle. Background technique [0002] Pure electric vehicles are one of the trends in the development of the automotive industry today. At present, most pure electric vehicles use a single-stage reducer, which can only meet the performance requirements at low speed or high speed. If the low-speed driving performance is satisfied, the high-speed power consumption is satisfied; if the high-speed driving performance is satisfied, the low-speed climbing ability is insufficient. Therefore, multiple transmission ratios are a development trend of pure electric vehicles. Two or more transmission ratios are used. When starting, the larger transmission ratio is used, and only a smaller motor output torque is required. When the speed is high, the smaller transmission ratio is used, so that the motor speed can be controlled at the rated va...

Claims

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Application Information

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IPC IPC(8): B60L15/20B60W30/19B60W10/08B60W10/11
CPCB60L15/20B60L15/2054B60L2240/421B60L2240/423B60W10/08B60W10/11B60W30/19B60W2540/10B60W2710/081B60W2710/083B60W2710/1005Y02T10/72
Inventor 张蕊代康伟梁海强
Owner BEIJING ELECTRIC VEHICLE
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