A large transmission ratio interval shift control method for series electric transmission vehicles

A technology with a large transmission ratio and a control method, which is applied in the direction of transmission control, multi-ratio transmissions, transmission components, etc., and can solve problems such as easy ablation, large temperature rise of friction plates of operating parts, and increased sliding friction work. , to achieve the effects of not being easily ablated, reducing the speed difference, and avoiding temperature rise

Active Publication Date: 2017-01-18
CHINA NORTH VEHICLE RES INST
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  • Claims
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Problems solved by technology

[0005] Due to the relatively large transmission ratio interval between the two gears, the speed difference between the active and passive sides of the shifting control member is very large, resulting in an increase in the sliding friction work during the shifting process, resulting in a very large temperature rise of the friction plate of the control member, which is prone to Ablation, so it is necessary to carry out shift control with large transmission ratio intervals

Method used

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  • A large transmission ratio interval shift control method for series electric transmission vehicles
  • A large transmission ratio interval shift control method for series electric transmission vehicles

Examples

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Embodiment 1

[0048] Such as Figure 1-2 As shown, the invention of this example is used for a large transmission ratio interval shift control method for a series electric transmission vehicle, the method is implemented by a series electric transmission vehicle transmission system; the method includes an upshift control process and a downshift control process .

[0049] Such as figure 2 As shown, in step S1, the transmission system integrated controller (TCU) included in the transmission system of the series electric transmission vehicle determines whether it is an upshift control process or a downshift control process according to the driver's manipulation signal.

[0050] If the gear is upshifted, step S2 is entered. The steps of the upshift control process include: the transmission system integrated controller (TCU) sends a brake release command to the control valve of the brake of the transmission mechanism 3: CH=0. Then go to step S3, the transmission system integrated controller (TCU) ob...

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Abstract

The invention relates to a control method for a high-transmission-ratio spaced shifting of a tandem type electric transmission vehicle. The method comprises an upshifting control process and a downshifting control process, during upshifting, a transmission comprehensive controller sends a separation command to a control valve of a brake of a speed change mechanism; the rotational speed of a planet carrier of the speed change mechanism and the rotational speed of a motor are obtained, so that a speed difference of an active edge and a passive edge of a clutch is obtained; and a rotational speed regulating command is sent to a motor controller, the speed difference is reduced, and when the speed difference is not greater than a limit value, the clutch is jointed; during downshifting, the transmission comprehensive controller sends the rotational speed regulating command to the motor controller, so that the rotational speed is lowered to about a shifting point, and the transmission comprehensive controller sends the separation command to the control valve of the clutch of the speed change mechanism; the rotational speed of the planet carrier of the speed change mechanism, the rotational speed of the motor and the rotational speed of a gear ring of the speed change mechanism are determined to obtain the speed difference of the active edge and the passive edge of the brake; the rotational speed regulating command is sent to the motor controller, the rotating speed difference is reduced, and when the rotating speed difference is not greater than a limit value, the clutch is jointed. The method covers a needed vehicle speed range, and satisfies the requirement of the largest output torque of the vehicle.

Description

[0001] Technical field: [0002] The invention relates to an interval shift control method, and more particularly to a large transmission ratio interval shift control method for a series electric transmission vehicle. [0003] Background technique: [0004] In the field of vehicle control, the use of electric motor speed regulation can realize continuously variable transmission of electric drive vehicles. However, the driving conditions of the vehicle are complicated. Although the motor speed range is large and can cover the required vehicle speed range, it cannot meet the maximum output speed of the vehicle. Moment requirements. Therefore, it is necessary to provide a planetary transmission mechanism with at least two gears in the electric transmission device to meet the requirements of output speed and torque at the same time. Considering the field weakening ratio of the motor, the two-gear transmission ratio interval of the transmission mechanism is usually larger, which is gener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16H59/02F16H61/32
CPCF16H59/0217F16H2061/326F16H2200/0021
Inventor 袁艺盖江涛李慎龙陈泳丹张欣马晓枫刘翼马田万帆
Owner CHINA NORTH VEHICLE RES INST
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