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Gear switching control method of AMT (Automatic Mechanical Transmission)

An automatic transmission, gear switching technology, applied in the direction of transmission control, mechanical equipment, components with teeth, etc., can solve the problems of difficult shifting, gear punching, etc., to reduce wear, smooth the shifting process, high speed. The effect of market application value

Inactive Publication Date: 2010-09-15
镇江恒驰科技有限公司
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AI Technical Summary

Problems solved by technology

[0003] The invention provides a control method for AMT gear switching of a mechanical automatic transmission. Relying on the current mainstream AMT electronic control technology and controller, the technical method of two clutches, neutral gear transition, speed synchronization, and smooth engagement is used to realize automatic gear switching. Accurate control, avoiding premature wear of the synchronizer, causing problems such as gear grinding and difficulty in shifting when shifting gears, and improving the reliability and life of the transmission. Mechanical automatic transmission with motor-controlled clutch and gear shifting

Method used

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  • Gear switching control method of AMT (Automatic Mechanical Transmission)
  • Gear switching control method of AMT (Automatic Mechanical Transmission)
  • Gear switching control method of AMT (Automatic Mechanical Transmission)

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Embodiment Construction

[0019] Taking the control system of a two-speed mechanical automatic transmission as an example, the clutch and shifting operations are explained with hydraulic actuators.

[0020] like figure 1 As shown, the vehicle speed sensor 13, the engine speed sensor 14 and the accelerator position sensor 15 are respectively installed at the transmission output shaft 9 end, the engine crankshaft flywheel end and the accelerator pedal end. The sensor and the controller 12 are connected by a common vehicle wiring harness, and the controller 12 is connected with the clutch solenoid valve hydraulic (gas) pressure control mechanism 2 and the shift solenoid valve hydraulic (gas) pressure control mechanism 11 through the common vehicle wiring harness. In this embodiment, the vehicle speed sensor 13 and the engine speed sensor 14 are Hall sensor type, and the throttle position sensor 15 is potentiometer type. Controller 12 utilizes existing A / D (analog / digital) signal acquisition technology to...

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Abstract

The invention provides a gear switching control method of an AMT (Automatic Mechanical Transmission) . In the method, the gear shifting strategy of two clutchings and neutral transitions is adopted to realize rev-synchronous PID (Proportion-Integral-Derivate) control algorithm; a clutch is separated, an engine is controlled in the conversed rotating speed according to the current speed and shifting transmission ratio, a transmission is placed in the neutral position (neutral transition), the clutch is engaged, the output shaft of the transmission is synchronized, the clutch is separated for the second time, the transmission is placed in the target shift, the clutch is engaged for the second time, and the control course of an engine throttle is controlled, so that the control course enables a shifting gear group to be accurately synchronous, the abrasion of a synchronizer is decreased, the service life of the synchronizer is prolonged, the whole shifting course is more smooth, and a higher market application value is obtained. The method can be widely applied to various automatic mechanical transmissions which use hydraulic and pneumatic execution mechanisms of electromagnetic valves and servo motors to control clutching and shifting.

Description

technical field [0001] The invention relates to the field of AMT control of a mechanical automatic transmission, in particular to a control method for shifting gears of a large transmission ratio mechanical automatic transmission. Background technique [0002] At present, in the field of commercial vehicles such as medium and heavy construction vehicles, special vehicles and hybrid electric buses, transmission structures with large transmission ratios are required. Due to the relatively large transmission ratio between two adjacent gears, in the process of shifting gears in the transmission AMT controlled by an electronic controller, problems such as toothing between gears and difficulty in shifting are often caused, and at the same time, the synchronizer and transmission gears in the transmission are worn. It is also very large and affects the life of the transmission. The key to solving this problem is to seek precise synchronous control of the power input and output shaf...

Claims

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Application Information

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IPC IPC(8): F16H59/36F16H59/70F16H63/40
Inventor 张育华王洪侯留业林超
Owner 镇江恒驰科技有限公司
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