Gear selection control method and device, equipment and medium
A control method and technology for gear selection, applied in the field of vehicles, can solve the problems of increasing shift time, drift of cylinder piston rod position, affecting the service life of solenoid valve, etc.
Pending Publication Date: 2022-04-05
WEICHAI POWER CO LTD
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Problems solved by technology
[0003] However, the corresponding cross-sectional areas of the two gear selection solenoid valves are usually different, so when the two gear selection solenoid valves are closed at the same time after the gear selection is completed, the position of the cylinder piston rod may drift
When the position drifts, it is judged that the current position of the cylinder piston rod is not the target position, so it is necessary to re-select the gear, which increases the shift time
Moreover, multiple gear selections require frequent switching of the gear selection solenoid valve, which affects the service life of the solenoid valve
Method used
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[0053] The solutions in the embodiments provided in the present application will be described below with reference to the drawings in the present application.
[0054] The terms "first" and "second" in the embodiments of the present application are used for description purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.
[0055] First, some technical terms involved in the embodiments of the present application are introduced.
[0056] Automated Mechanical Transmission (AMT) is an automatic control mechanism with an electronic unit added under the condition that the basic structure of the original mechanical manual transmission remains unchanged, replacing the clutch manually completed by the driver. Operations such as disengagement and engagement, gear remova...
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The invention provides a gear selection control method which comprises the following steps: determining a required gear position through a TCU (Transmission Control Unit), when the required gear position is a middle position, keeping a first gear selection electromagnetic valve and a second gear selection electromagnetic valve to be opened, executing gear engagement, and closing the gear selection electromagnetic valve and a second electromagnetic valve after gear engagement succeeds. Therefore, the first gear-selecting electromagnetic valve and the second gear-selecting electromagnetic valve are not closed in the gear-selecting stage, but are closed after the gear is successfully engaged, so that the situation that the required gear cannot be engaged due to position drifting of the piston rod of the air cylinder caused by closing the electromagnetic valves is avoided, the gear-engaging time is shortened, and the service life of the electromagnetic valves is prolonged.
Description
technical field [0001] The present application relates to the technical field of vehicles, and in particular to a gear selection control method, device, equipment, computer-readable storage medium, and computer program product. Background technique [0002] The shifting process of the vehicle includes four stages: twisting, shifting, speed regulation and shifting, such as figure 1 As shown, gear selection can be carried out during the speed regulation stage. The gears of the vehicle usually include the gears on both sides and the middle gear, which are controlled by the gear selection solenoid valve. Normally, when the required gear is in the middle position, the two gear selection solenoid valves are opened at the same time, so that the cylinder piston rod is positioned in the middle position of the gear. [0003] However, the corresponding cross-sectional areas of the two gear selection solenoid valves are usually different, so when the two gear selection solenoid valves...
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IPC IPC(8): F16H61/28F16H61/02
Inventor 赵国强姜良超孙宁阳乔运乾
Owner WEICHAI POWER CO LTD