Gear shifting control method based on DAT gearbox

A control method and gearbox technology, which is applied in the field of vehicles, can solve problems such as vibration, large speed difference, and vehicle abnormality, and achieve the effects of avoiding abnormal noise and vibration, reducing the time for shifting gears, and reducing the time interval

Active Publication Date: 2021-07-16
FUJIAN WANRUN NEW ENERGY TECH
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Problems solved by technology

[0005] Therefore, it is necessary to provide a shift control method based on the DAT gearbox to solve the problem that the shifting time of the existing transmission is too long, and the change of the vehicle speed or the change of the motor speed will cause a large difference in the speed of the mechanical combination, which will cause abnormalities in the vehicle. and dither

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  • Gear shifting control method based on DAT gearbox

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Embodiment Construction

[0035] In order to explain in detail the technical content, structural features, achieved goals and effects of the technical solution, the following will be described in detail in conjunction with specific embodiments and accompanying drawings.

[0036] see figure 1 , the present embodiment provides a shift control method based on a DAT gearbox, comprising the following steps:

[0037] Step S111: the vehicle power-on self-inspection is completed;

[0038] Step S112: Waiting for a shift request;

[0039] Step S113: judging whether there is a shift demand;

[0040] When a shift request is received, step S114 is performed: clearing the torque of the engine;

[0041] Step S115: Calculate the remaining time from the engine torque clearing to the target torque;

[0042] Step S116: judging whether the remaining time from the torque of the engine to the target torque is less than the preset remaining time;

[0043] When the remaining time from the torque removal of the engine to ...

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Abstract

The invention relates to a gear shifting control method based on a DAT gearbox. The method comprises the following steps: clearing the torque of an engine when a gear shifting demand is received; calculating remaining time for clearing the torque of the engine to the target torque; when the remaining time for clearing the torque of the engine to the target torque is smaller than the preset remaining time, executing the action of engaging a neutral gear; after the action of engaging the neutral gear is executed, regulating the speed of the engine; calculating the speed regulation time for regulating the speed of the engine to the target rotating speed; when the speed regulation time for regulating the speed of the engine to the target rotating speed is lower than the preset speed regulation time, executing the action of engaging a target gear; and after the target gear is engaged, recovering the torque of the engine. The time of the gear shifting process is fully utilized, the whole gear shifting time is shortened, meanwhile, the time interval between the speed regulation process and the gear advancing process of the engine is shortened, and abnormal sound and shaking caused by gear advancing after the rotating speed changes are avoided.

Description

technical field [0001] The invention relates to the technical field of vehicles, in particular to a gear shift control method based on a DAT gearbox. Background technique [0002] Dry Friction Externally Contrded Autmatic Transmission (DAT for short in English); its design concept is to divide the transmission into a clutch part and a gearless planetary gear transmission part. The clutch part is the cadre, which is characterized by no lubricant ; The gearless type planetary gear transmission part is the wet part, which is characterized by lubricating oil; the planetary gear transmission mechanism is integrated in the wet part, while the shift actuators and braking components are arranged in the dry part. [0003] Vehicle gear shifting is one of the most commonly used functions of vehicles, and general vehicles have gear shifting functions. Including the emerging pure electric vehicles in recent years, they have also gone through the process of direct drive to gearbox. Then...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H61/04
CPCF16H61/0213F16H61/0403Y02T10/62
Inventor 乐光彩雷学国钟毅铭林波
Owner FUJIAN WANRUN NEW ENERGY TECH
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