Air pressure self-adjusting structure for electronic control pneumatic AMT gearbox

Abstract

The utility model provides an air pressure self-adjusting structure for an electrically-controlled pneumatic AMT gearbox, which comprises an electric adjusting valve arranged between a high-pressure air source and an AMT air inlet. An air source capable of adjusting air pressure in real time is provided for the gearbox through the electric pressure adjusting valve and the air pressure sensor so as to meet the requirements of the gearbox on air inlet pressure under various working conditions.

Description

Technical Field

[0001] The utility model relates to the field of time domain transmission, and specifically to a structure for self-regulating air pressure of an electronically controlled pneumatic AMT transmission. Background Art

[0002] AMT is a transmission device that can automatically shift gears according to the vehicle's operating status and the road environment. It is based on the manual transmission and is equipped with an automatic gear selection and shift actuator and a clutch actuator, plus a TCU control unit. It can automatically shift up and down according to the current road conditions to meet the driver's driving needs.

[0003] At present, automatic transmission commercial vehicles mainly use mechanical automatic transmission (AMT). At the same time, in order to meet the requirements of gear shifting reliability and long gear shifting life, the current mainstream solution adopts electronically controlled pneumatic actuators and uses an intermediate shaft brake with a sliding sleeve gearbox. Its reliability has great cost advantages and higher reliability than that of a synchronizer gearbox, and it can be used in more harsh environments.

[0004] As the air pressure of the whole vehicle is gradually increasing, this puts forward higher requirements on the fatigue of other parts of the whole vehicle. The gearbox has a strict demand for air pressure, which affects the control system of the gearbox, mainly many key components such as the shift actuator and the clutch actuator. The shift force of the shift actuator is correlated with the gearbox oil temperature. When the gearbox oil temperature is low, the viscosity of the gearbox oil is large, the gear shift resistance is large, and a larger shift force is required; when the gearbox oil temperature is normal, the oil viscosity decreases, and the required shift force is reduced. The clutch actuator also has strict requirements on air pressure, and under specific working conditions, the change of air pressure is also required to be controlled. Utility Model Content

[0005] The purpose of the utility model is to provide a structure for self-regulating the air pressure of an electronically controlled pneumatic AMT transmission, which solves the above-mentioned problem that the transmission air pressure is insufficient after the line, resulting in the above-mentioned shortcomings when the transmission shifts gears.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The utility model provides a structure for self-regulating air pressure of an electrically controlled pneumatic AMT transmission, comprising an electric regulating valve, wherein the electric regulating valve is arranged between a high-pressure air source and an AMT air inlet.

[0008] Preferably, the signal input end of the electric regulating valve is connected to a motor controller.

[0009] Preferably, an air pressure sensor is provided at the air inlet of the AMT, a signal output end of the air pressure sensor is connected to a motor controller, and a signal output end of the motor controller is connected to an electric regulating valve.

[0010] Preferably, the electric regulating valve comprises a motor and an air pressure regulating valve, and the output shaft of the motor is connected to an actuator of the air pressure regulating valve.

[0011] Preferably, the air inlet end of the air pressure regulating valve is connected to a high-pressure air source, and the air outlet end of the air pressure regulating valve is connected to an AMT air inlet.

[0012] Preferably, the signal input terminal of the motor is connected to a motor controller.

[0013] Preferably, the signal input end of the electric regulating valve is connected to a motor controller; an air pressure sensor is provided at the air inlet of the AMT, and the signal output end of the air pressure sensor is connected to the motor controller; the electric regulating valve includes a motor and an air pressure regulating valve, and the output shaft of the motor is connected to the actuator of the air pressure regulating valve.

[0014] Preferably, an air pressure sensor is provided at the air inlet of the AMT, and the signal output end of the air pressure sensor is connected to the motor controller; the electric regulating valve includes a motor and an air pressure regulating valve, and the output shaft of the motor is connected to the actuator of the air pressure regulating valve; the signal input end of the motor is connected to the motor controller; the air inlet end of the air pressure regulating valve is connected to a high-pressure air source, and the air outlet end of the air pressure regulating valve is connected to the AMT air inlet.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model provides a structure for self-regulating air pressure of an electrically controlled pneumatic AMT transmission. An electric pressure regulating valve is added to the air inlet of the transmission. An air pressure sensor is installed at the rear end of the electric pressure regulating valve. The electric pressure regulating valve and the air pressure sensor are used to provide the transmission with an air source that can adjust the air pressure in real time, so as to meet the requirements of the transmission for air intake pressure under various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the air pressure self-regulating air circuit;

[0018] Figure 2 This is the block diagram of the air pressure self-regulating system;

[0019] Figure 3 This is the diagram of the air pressure self-regulating control system. DETAILED DESCRIPTION

[0020] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0021] Example 1

[0022] At present, the AMT transmission requires a separate gas tank for the whole vehicle, and the air pressure is mainly adjusted by a mechanical pressure-limiting valve. However, the air pressure cannot be changed after leaving the factory, and cannot adapt to the full working conditions of the transmission. In addition, in a high temperature environment, the shift force requirement is small. At this time, the air pressure is large, which will produce a large gear shift force, resulting in an obvious gear shift knocking sound. In a low temperature environment, when the air pressure is fixed, problems such as insufficient gear shift force and gear shift failure may occur.

[0023] In this regard, the present embodiment provides a structure for self-regulating air pressure of an electrically-controlled pneumatic AMT transmission, comprising an electric pressure regulating valve, a motor controller and an air pressure sensor 3, wherein the signal output end of the motor controller is connected to the signal input end of the electric pressure regulating valve, and the air pressure sensor 3 is used to collect the pressure of the AMT air inlet and transmit the collected pressure to the motor controller; the gas inlet of the electric pressure regulating valve is connected to a high-pressure gas tank, and the gas outlet of the electric pressure regulating valve is connected to the AMT air inlet.

[0024] The working process of this embodiment is as follows: Figure 3 As shown:

[0025] Step 1: After powering on, enter the transmission control system and start calculating the TCU required air pressure value;

[0026] Step 2, TCU sends a target intake pressure value;

[0027] Step 3, the motor controller reads the current air pressure after the valve;

[0028] Step 4, compare the TCU required air pressure and the current valve rear air pressure, where when the TCU required air pressure is greater than the valve rear air pressure, the electric pressure regulating valve is used to adjust the air pressure until the valve rear air pressure is equal to the TCU required air pressure; when the TCU required air pressure is less than the valve rear air pressure, the electric pressure regulating valve is used to adjust the air pressure until the valve rear air pressure is equal to the TCU required air pressure; when the TCU required air pressure is equal to the valve rear air pressure, the electric pressure regulating valve maintains the current position.

[0029] This embodiment can accurately adjust the air pressure of the AMT system, thereby achieving accurate control of the clutch actuator and accurate control of the shifting force.

[0030] Example 2

[0031] like Figure 1 As shown, based on Example 1, this example provides a structure for self-regulating air pressure in an electrically controlled pneumatic AMT transmission, wherein the electric regulating valve comprises a motor 2 and an air pressure regulating valve 1, wherein the output end of the motor 2 is connected to the actuator of the air pressure regulating valve 1.

[0032] The working process of this embodiment:

[0033] The outlet pressure of the air pressure regulating valve 1 is adjusted by the forward and reverse rotation of the motor 2. The air pressure sensor 3 is connected to the rear end of the air pressure regulating valve to collect the output air pressure of the air pressure regulating valve in real time, and the feedback adjustment is performed on the whole system, thereby realizing the self-regulation of the AMT intake pressure.

[0034] Figure 2 This is a block diagram of the air pressure self-adjusting system, where the arrow direction indicates the connection of the control system; TCU issues a required air pressure value based on the current working conditions. After the electric pressure regulating valve obtains the required air pressure from TCU, it controls the motor to make adjustments. The adjusted air pressure value is obtained through the air pressure sensor and transmitted to the electric pressure regulating valve controller. When the required air pressure is the same as the current air pressure, the control process exits.

[0035] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission, characterized in that: It includes an electric regulating valve, which is arranged between a high-pressure gas source and an AMT air inlet; a signal input end of the electric regulating valve is connected to a motor controller; an air pressure sensor is provided at the AMT air inlet, a signal output end of the air pressure sensor is connected to the motor controller, and a signal output end of the motor controller is connected to the electric regulating valve.

2. The structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission according to claim 1, characterized in that: The electric regulating valve comprises a motor and an air pressure regulating valve, and the output shaft of the motor is connected to the actuator of the air pressure regulating valve.

3. The structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission according to claim 2, characterized in that: The air inlet end of the air pressure regulating valve is connected to a high-pressure air source, and the air outlet end of the air pressure regulating valve is connected to an AMT air inlet.

4. The structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission according to claim 2, characterized in that: The signal input end of the motor is connected to the motor controller.

5. The structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission according to claim 1, characterized in that: The signal input end of the electric control valve is connected to the motor controller; an air pressure sensor is arranged at the air inlet of the AMT, and the signal output end of the air pressure sensor is connected to the motor controller; the electric control valve includes a motor and an air pressure regulating valve, and the output shaft of the motor is connected to the actuator of the air pressure regulating valve.

6. The structure for self-regulating air pressure in an electronically controlled pneumatic AMT transmission according to claim 1, characterized in that: An air pressure sensor is provided at the air inlet of the AMT, and a signal output end of the air pressure sensor is connected to a motor controller; the electric regulating valve includes a motor and an air pressure regulating valve, and an output shaft of the motor is connected to an actuator of the air pressure regulating valve; the signal input end of the motor is connected to the motor controller; the air inlet end of the air pressure regulating valve is connected to a high-pressure air source, and the air outlet end of the air pressure regulating valve is connected to the air inlet of the AMT.

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