Control method and device and vehicle

A vehicle speed and signal technology, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as reducing vehicle reliability, switching failure, affecting user driving experience, etc., to improve driving experience, The effect of improving reliability

Active Publication Date: 2022-07-01
GREAT WALL MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the present invention aims to propose a control method, device and vehicle to solve the problem that the automatic transmission fails to switch when the low-speed four-wheel drive mode is switched, which reduces the reliability of the vehicle and affects the driving experience of the user.

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  • Control method and device and vehicle
  • Control method and device and vehicle
  • Control method and device and vehicle

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Embodiment Construction

[0046] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

[0048] refer to figure 1 , showing a flow chart of the steps of a control method provided by the first embodiment of the present invention, and the control method can be applied to an automatic transmission of a vehicle.

[0049] like figure 1 As shown, the control method may specifically include the following steps:

[0050] Step 101: Acquire driving mode related signals, automatic transmission gear signals and vehicle speed values.

[0051]The driving mode related signals include the mode switching flag signal and the driving mode signal. The driving mode signal includes the driving mode signal valid bit and the driving mode signal. The mode switchin...

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Abstract

The invention provides a control method and device and a vehicle. The control method is applied to an automatic transmission of the vehicle and comprises the steps that a driving mode related signal, an automatic transmission gear signal and a vehicle speed value are obtained; generating a clutch opening signal under the condition that the driving mode related signal, the automatic transmission gear signal and the vehicle speed value meet a preset clutch opening triggering condition; based on the clutch opening signal, the clutch in the pre-combination state is controlled to be in an opening state; acquiring an oil pressure value in the clutch; when the oil pressure value is zero, the drag torque of the automatic transmission is reduced, it is guaranteed that the current output torque, generated based on a clutch, of the automatic transmission is smaller than a preset input torque threshold value set by the intelligent four-wheel-drive system, and at the moment, the intelligent four-wheel-drive system is controlled to switch the current working mode into a low-speed four-wheel-drive mode; the phenomenon of switching failure during switching of the low-speed four-wheel drive mode is avoided, the reliability of the vehicle is improved, and the driving experience of a user is improved.

Description

technical field [0001] The present invention relates to the technical field of vehicle control, and in particular, to a control method, device and vehicle. Background technique [0002] With the gradual development of the field of vehicle control technology, the Torque-On-Demand (TOD) system, as a branch of the vehicle, has also developed rapidly. [0003] At present, when TOD switches the low-speed four-wheel drive (4L) mode, it usually controls the engagement and opening of the clutch to realize the switching of the 4L mode. Among them, the switching of 4L mode can only be completed when the vehicle is in the state of neutral (N) gear. For automatic transmission (Automatic Transmission, AT), there are two clutches corresponding to the N gear, one of which is in the engaged state, and the other One clutch is in a pre-engagement state. In the pre-engagement state, the clutch maintains the base oil pressure value. At this time, the output torque of the automatic transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16H61/02F16H59/44F16H59/68F16H59/14
CPCF16H61/0213F16H59/44F16H59/68F16H59/14F16H2059/683F16H61/02F16H61/18
Inventor 魏英杰王建录张占春郭晓泉
Owner GREAT WALL MOTOR CO LTD
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