KR19990069307A - Pneumatically controlled commercial vehicle manual shift system - Google Patents

Abstract

The present invention relates to a pneumatically controlled commercial vehicle shift system, the lever position detection for outputting a lever position signal according to the position change of the clutch switching unit 10 and the shift lever operating unit 20 for generating a switching signal according to the operation of the clutch. A gear valve 22 for forming a pneumatic pressure for performing a gear shift corresponding to a predetermined lever position according to a predetermined pneumatic control signal, and a gear position sensing unit for sensing a gear position according to the gear shift ( 46), the gear status display unit 50 which displays the gear position to the outside, and the gear shift mode in response to a switching signal informing the power cut of the commercial vehicle provided from the clutch switching unit 10, and the lever under the gear shift mode. The pneumatic control signal corresponding to the shift lever operating part position change signal from the position detecting unit 22 is outputted to the shift valve 42 and the lever position detecting unit 22 is output. It is determined whether the shift lever operating unit position data and the gear position data from the gear position detecting unit 46 match with each other, and when the shift lever operating unit position data and the gear position data match, the display control signal for displaying the set gear position is displayed. It is comprised by the control part 30 which outputs to the display part 50, respectively.

That is, the present invention not only can easily perform gear shifting of a commercial vehicle, but also has an effect of improving durability and reliability through simplification by eliminating connection portions between a shift lever and a shift gear of a commercial vehicle.

Description

Pneumatically controlled commercial vehicle manual shift system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual transmission of commercial vehicles, and more particularly, to a pneumatic controlled air vehicle transmission system for controlling gear shifting by pneumatic pressure.

Revolution Per Minute (RPM) of the engine is relatively limited in the vehicle, but the driving force required by the vehicle is not enough by the passive engine rotational speed and various changes such as road conditions, loading loads, desired speed, etc. Requires elastic change

In order to solve this situation, a transmission is installed between the engine and the propulsion shaft of the vehicle to adjust the output of the engine to the appropriate stage in response to the desired driving speed of the vehicle. That is, when the shift lever in the driver's seat is operated, the transmission performs a function of transmitting variously changed rotational forces and speeds to the driving wheels.

However, manual shift operation in a commercial vehicle, for example, a large vehicle used for commercial purposes such as a bus, a truck, etc. has been somewhat more difficult than the shift operation of a general small vehicle. That is, the shift lever and the shift gear are directly connected to each other mechanically, which results in an increase in driver fatigue caused by excessive shift lever operation. As a result, a problem arises in that accurate and quick shifting cannot be performed.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to remove the mechanical connection between the manual shift lever and the shift gear of a commercial vehicle, and to control the gear shift by pneumatic to make shift operation easier. To provide a pneumatically controlled commercial vehicle shift system.

That is, the present invention, the clutch switching unit for generating a switching signal according to the operation of the clutch; A lever position detecting unit mounted at a predetermined position of the shift lever operating unit and outputting a lever position signal according to a change in position of the shift lever operating unit; A shift valve for forming a pneumatic pressure for performing a gear shift corresponding to a predetermined lever position in accordance with a predetermined pneumatic control signal; A gear position sensing unit for sensing a gear position according to the gear shift; A gear status indicator for displaying the gear position to the outside; The gear shift mode is set in response to a switching signal indicative of power off of the commercial vehicle provided from the clutch switching unit, and the pneumatic control signal corresponding to the shift lever control unit position change signal from the lever position sensor is output to the shift valve under the gear shift mode. Judge whether the shift lever operating unit position data from the lever position detecting unit and the gear position data from the gear position detecting unit match, and if the shift lever operating unit position data and the gear position data match, display control signals for displaying the set gear position. It provides a transmission system of a pneumatically controlled commercial vehicle, characterized in that it comprises a control unit for outputting to the gear state display unit.

1 is a block diagram of a pneumatically controlled commercial vehicle manual shift system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

10: clutch switching unit 20: lever operation unit

22: lever position detection unit 24: completion valve

30: TCU 40: gear conversion unit

42: shift valve 44: actuator

46: gear position detection unit 50: gear status display unit

60: transmission 70: function control panel

72: engine start relay 74: small on switch

76: engine drive detection unit 78: speed detection unit

The above objects and various advantages of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of a pneumatically controlled commercial vehicle manual shift system according to the present invention, a clutch switching unit 10, a lever operation unit 20, a transmission control unit (TCU) 30, a gear conversion unit 40, a gear It includes a status display unit 50, a transmission 60 and a function operation unit 70.

As shown, the clutch switching unit 10 is switched according to the operation of the clutch (not shown) by the driver, and provides a logic signal according to the switching operation to the TCU 30 described later. For example, when a logic signal of a high or low level according to the clutch operation of the clutch switching unit 10 is provided to the TCU 30, the TCU 30 is in a state in which it is possible to shift, and is omitted from an arbitrary shift position by the driver. The shift lever can be operated.

The lever operating unit 20 is composed of a lever position detecting unit 22 and a completion valve 24. First, the lever position detecting unit 22 is mounted at a predetermined position of a shift lever of a commercial vehicle to convert a position value according to the shift lever operation into an electrical signal and output the converted signal. This lever operation position output process can be easily understood by those skilled in the art, detailed description thereof will be omitted.

Further, the completion valve 24 forms a reaction force pneumatic force for causing the user to recognize the shift gear start according to the gear shift value from the gear position sensor 46 described later under the control of the TCU 30 to the shift lever operating portion. That is, the driver is notified through the shift lever that the predetermined shift step has been successfully performed. The completion valve 24 may use a solenoid valve that can change the direction of the flow path by moving the spool valve left and right to change the entrance between the cylinder and the spool.

The gear converter 40 is composed of a shift valve 42, an actuator 44 and a gear position sensor 46, and is operated to convert the transmission 60 to a predetermined stage under the control of the TCU 30. Used as a device.

That is, the shift valve 42 in the gear converter 40 is also composed of a solenoid valve, and forms a gear shift air pressure in the gear converter 40 in response to a gear shift control signal from the TCU 30 described later. . By the gear shift pneumatic, the actuator 44 including the cylinder in the gear conversion unit 40 is operated, and the transmission 60 is driven by the actuator 44 to perform the set shift.

In addition, the gear position detecting unit 46 detects a gear position corresponding to the gear shift and provides a position signal according to the gear position to the TCU 30.

The function operation unit 70 is composed of an engine start relay 72, a small on switch 74, an engine drive detection unit 76, and a speed detection unit 78, respectively.

The engine starting relay 72 reads data of the lever position detecting unit 22 and the gear position detecting unit 46 when the vehicle starts, and serves to cut off the power line so that the engine does not start unless it is in a neutral state. In addition, the small on switch 74 is connected to the taillight switch (not shown) of the commercial vehicle, and functions to change the brightness of the clock and the gear state display unit 50 composed of segment elements. The small on switch 74 has its function when the tail light switch is turned on. In general, when the tail light switch is turned on, the brightness of the segment clock and the brightness of the gear state display unit 50 become weak. During the afternoon or night operation, the small on switch 74 may be operated to adjust the brightness of the watch and the brightness of the gear state display unit 50.

The engine drive detection unit 76 is a switching element that detects the operation of the engine, and outputs a switching signal according to whether the engine is driven, and the speed detection unit 78 measures the engine rotation speed measured from the transmission 60 described above. Data is provided to the TCU 30 to enable proper shifting.

The TCU 30 is provided with a clock turn-on signal, an engine key on / off signal, and speed data of the function operation unit 70, and the pneumatic shift control can be smoothly performed by these data.

In addition, the TCU 30 sets the gear shift mode in response to a predetermined logic signal from the clutch switching unit 10 informing the operation of the clutch, and sets the gear shift mode to the shift lever position from the lever position sensor 22 under the gear shift mode. Outputs a corresponding pneumatic control signal to the shift valve 42, determines whether the shift lever position data from the lever position sensing section 22 and the gear position data from the gear position sensing section 46 match, and shifts the lever position data. If and the gear position data match, a display control signal for displaying the set gear position is output. That is, the gear state display unit 50 is connected to the TCU 30 to display the current gear position to the outside.

As described above, the present invention can not only easily perform gear shifting of a commercial vehicle, but also have an effect of improving durability and reliability through simplification by eliminating the connection portion between the shift lever and the shift gear of the commercial vehicle.

Claims (3)

In the pneumatically controlled commercial vehicle shift system that controls the gear shifting by forming a predetermined pneumatic pressure in accordance with the shift lever position variation in the shift lever operating portion 20 of the commercial vehicle, A clutch switching unit 10 generating a switching signal according to the operation of the clutch; A lever position detecting unit 22 mounted at a predetermined position of the shift lever operating unit 20 to output a lever position signal according to a change in position of the shift lever operating unit 20; A shift valve 42 for forming a pneumatic pressure for performing a gear shift corresponding to a predetermined lever position in accordance with a predetermined pneumatic control signal; A gear position detecting unit 46 which detects a gear position according to the gear shift; A gear state display unit 50 which displays the gear position to the outside; A gear shift mode is set in response to a switching signal indicative of power cutoff of the commercial vehicle provided from the clutch switching unit 10, and the gear shift mode position shift signal from the lever position sensing unit 22 is changed under the gear shift mode. Outputs the corresponding pneumatic control signal to the shift valve 42 and judges whether the shift lever operating section position data from the lever position sensing section 22 and the gear position data from the gear position sensing section 46 match each other. And a control unit 30 for outputting a display control signal for displaying a set gear position to the gear state display unit 50 when the shift lever operating unit position data and the gear position data coincide with each other. Shifting system. The method of claim 1, The shift lever operating unit 20; And a completion valve (24) for forming a reaction force pneumatic for the user to recognize the gear shift in the shift lever operating portion (20). The method according to claim 1 or 2, The shift valve (42) and the completion valve (24) is a shift system of the pneumatically controlled commercial vehicle, characterized in that consisting of a solenoid valve.