A kind of AMT shift control method and device
A technology of shifting control and shifting selection, applied in transmission control, components with teeth, belts/chains/gears, etc., can solve problems such as shifting overshoot and hardware damage
Active Publication Date: 2022-04-05
WEICHAI POWER CO LTD
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[0004] In view of this, the purpose of the present invention is to provide an AMT gear shift control method and device to solve the problem of gear shift overshoot or even hardware damage caused by the gear shift control method in the related art. The disclosed technical solution is as follows:
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[0045] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] In order to facilitate the understanding of the shift control scheme of this application, first combine figure 1 with figure 2 The control principle of the gear selection and shift actuator is described.
[0047] See figure 1 with figure 2 , figure 1A structural schematic diagram of a gear selection actuator and a gear shift act...
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The present application provides an AMT shift control method and device, which divides a shift formation of a shift actuator into multiple intervals in advance, and sets a corresponding position change rate limit for each interval. When shifting gears, obtain the current position of the gear selection execution structure and determine the interval to which the current position belongs. If the current section is a target preset section close to the target gear selection position, the position change rate of the gear selection actuator is acquired. If the position change rate of the gear selection actuator is greater than or equal to the position change rate limit value corresponding to the target preset interval, the switch solenoid valve corresponding to the target gear selection side is controlled to close and / or the target selection gear is controlled to be closed. The switching solenoid valves opposite to the gear position are opened, thereby slowing down the moving speed of the gear selection and shifting actuator, and realizing smooth gear shifting.
Description
technical field [0001] The invention belongs to the technical field of automobile control, and in particular relates to an AMT shift control method and device. Background technique [0002] Automated Mechanical Transmission (AMT) is an automatic transmission with electromechanical hydraulic integration. [0003] The control method of the traditional AMT actuator is that when a certain gear needs to be shifted, it is only necessary to open the corresponding switch solenoid valve, and then close the switch solenoid valve after reaching a certain position to shift gears. However, the AMT shift actuator The on-off solenoid valve is used, either fully open or fully closed, and the valve of the electromagnetic switch valve is open-loop control after opening, so it is very easy to produce the situation of exceeding the calibration in the gear band, resulting in shifting impact or even damage to the hardware. . Contents of the invention [0004] In view of this, the purpose of t...
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IPC IPC(8): F16H61/02F16H61/04
CPCF16H61/0213F16H61/04
Inventor 赵国强任宪丰李强邓金涛桂经良
Owner WEICHAI POWER CO LTD