KR100391270B1 - Method for contolling for semiautomatic transmission for large vehicles - Google Patents

Abstract

The present invention relates to a semi-automatic transmission of a large vehicle, in particular to reduce the burden of the shift lever operation to the driver by performing the change of the shift stage in the manual shift state by the button operation of the shift lever, located between the engine and the transmission Friction clutch 13 to be made; A gear transmission unit for shifting a gear of the transmission in accordance with a control signal; User control signals by the shift lever 1, the accelerator pedal and the clutch pedal, and signals input from the gear position sensor 16, the clutch position sensor 17, the vehicle speed sensor 18, and the engine speed sensor 19. In the control method of the semi-automatic transmission apparatus of a large vehicle comprising a shift control unit 21 for controlling the gear shift unit 14 to perform automatic shift / manual shift, when the manual shift state is selected by the shift lever, The shift control unit when the current shift stage is not backward and neutral but at the same time there is a vehicle speed, when the shift up button of the shift lever is operated once, set the target shift stage to "current shift stage + 1" and then rotate the engine after shifting. It is judged that the number is shiftable by comparing the number with the maximum torque engine speed and the maximum power engine speed, and when the clutch is operated by the user, the gear shift part is controlled to adjust the gear shift upward. A control method of the apparatus in.

Description

Control method of semi-automatic transmission for large vehicles {Method for contolling for semiautomatic transmission for large vehicles}

The present invention relates to a semi-automatic transmission of a large vehicle, in particular a control method of a semi-automatic transmission of a large vehicle to reduce the burden of the shift lever operation to the driver by performing the change of the shift stage in the manual shift state by the button operation of the shift lever. It is about.

In general, in the case of a large vehicle such as a bus or a truck, the shifting burden of the driver is great when using a manual transmission that operates a shift gear by applying an artificial force to move the shift lever.

That is, in the case of a large bus, for example, since several connecting rods are connected in a row from the shift lever installed next to the driver's seat to the transmission mounted at the rear of the vehicle, there is a loss of power in each link. The driving force of the driver is more expensive.

In such a conventional manual transmission, the transmission power of a large vehicle transmission is usually 10kg or less, but when the gear shifting stage is lowered, two or three times the power is applied, and frequent shifting is caused by traffic jams, thereby increasing the fatigue of the driver. Semi-automatic transmissions have emerged.

The shift lever applied to the semi-automatic shifting device removes the rod or cable connecting the shift lever and the transmission of the conventional manual transmission, outputs the driver's shift lever operation state as an electric signal, and actually shifts the gear shift to pneumatic or hydraulic pressure. Has been modified to do this.

For example, the shift lever 1a shown in FIG. 1A has the same shape as the shift lever of a conventional manual transmission. When the shift lever is operated by a driver, the shift control unit converts the operation state of the shift lever into an electric signal. And the transmission control unit supplies the air of a predetermined pressure to the shift lever and performs the shift, and discharges the air of the shift lever to make the driver feel the shift when the shift is completed.

The shift lever 1b shown in FIG. 1B is similar in form to the shift lever of the automatic transmission, and it is possible to select the automatic shift and the manual shift, and the shift lever should be operated left and right to raise or lower the shift stage during manual shift. .

The shift lever 1c shown in FIG. 1C has a form similar to a joystick, and the shift lever must be operated up and down to raise or lower the shift stage.

In the semi-automatic shifting device, the shifting force of the shift lever is significantly improved compared to the shifting force of the shift lever in the conventional manual transmission, and the shifting force can be changed to a shift force of 1 to 2 kg.

However, in the case of the shift lever shown in FIG. 1A of the semi-automatic shifting device, although the shift force is small, there is a reaction force, and the shift lever must be operated for each shift stage, and a reservation function of the shift stage cannot be performed, FIGS. 1B and 1C. In the case of the shift lever shown in Fig. 2, the shift function of the shift stage can be performed. However, unlike the shift lever of the automatic transmission, there is a problem in that the shifting of the driver's arm left and right or up and down can be performed.

An object of the present invention is to solve the conventional problems, in particular in a semi-automatic transmission of a large vehicle, in the manual shift state provided with a shift up / down button for shifting up and down the shift stage in the manual shift state The present invention provides a control method of a semi-automatic transmission apparatus for a large vehicle to reduce the burden of the shift lever operation by performing a change of the shift stage by a button operation of the shift lever.

The control method of the semi-automatic transmission of a large vehicle of the present invention includes a friction clutch positioned between the engine and the transmission; A gear transmission for shifting a gear of the transmission according to a control signal; Performs automatic shift / manual shift by controlling the gear shift unit according to a user control signal by a shift lever, an accelerator pedal and a clutch pedal, and signals input from a gear position sensor, a clutch position sensor, a vehicle speed sensor, and an engine speed sensor. In the control method of a semi-automatic transmission apparatus for a large vehicle composed of a shift control unit, when the manual shift state is selected by the shift lever, the shift control unit may be configured to shift the shift lever when the current shift stage is not backward and neutral. When the shifting up button is operated once, the target shift stage is set to "current shift stage + 1", and after shifting, it is determined that the shift is possible by comparing the engine speed with the maximum torque engine speed and the maximum power engine speed. When the clutch is operated by the user, the gear shift unit is controlled to adjust the shift stage upwardly.

1a to 1c is a perspective view showing a conventional shift lever,

2a and 2b is a perspective view showing a shift lever in the present invention,

3 is a block diagram showing a configuration of the present invention;

4 is a flow chart showing the operation of the present invention;

Figure 5 is a flow chart showing the operation of the manual shift state of the present invention.

<Description of Symbols for Major Parts of Drawings>

1, 1a, 1b, 1c: Shift lever 2: Shift up button

3: shift down button 11: engine

12: transmission 13: friction clutch

14: gear transmission 16: gear position sensor

17: clutch position sensor 18: vehicle speed sensor

19: engine speed sensor 20: throttle position sensor

21: shift control unit 22: shift display unit

An embodiment of the present invention will be described in detail with reference to FIGS. 2A to 5.

An embodiment of the semi-automatic transmission of a large vehicle according to the present invention includes a friction clutch 13 positioned between an engine and a transmission and operated by a clutch pedal as shown in FIGS. 3 and 4; A gear transmission unit for shifting a gear of the transmission in accordance with a control signal; Shift lever (1), user control signal by the clutch pedal, gear position sensor (16), clutch position sensor (17), vehicle speed sensor (18), engine speed sensor (19), spottle position sensor (20) In the semi-automatic transmission of a large vehicle, comprising a shift control unit 21 for controlling the gear shift unit 14 according to a signal input from the vehicle, the shift unit 21 performs a manual shift / manual shift. In the shift state, a shift up button 2 for outputting a signal for upwardly adjusting the shift stage and a shift down button 2 for outputting a signal for downwardly adjusting the shift stage are provided.

In addition, there is a shift display unit 22 for displaying a current shift stage, a reserved shift stage, and a shift completion to a user according to a control signal of the shift controller 21.

First, as shown in FIG. 4, the user selects a shift stage by operating the shift lever 1. If the gear shift selected by the user is reverse (R), shift to reverse; if neutral (N), shift to neutral; if driving (D), shift from 1 to 5 according to the gear shift map stored in memory, and manually ( If M), the manual shift is performed according to the shift up button (up) and the shift down button (down) operation of the shift lever 1 by the user.

For example, when the shift lever 1 is located in the reverse direction R, the shift control unit 21 may operate the clutch by a user to input a signal from the clutch position sensor 17. Control to shift the shift to reverse.

When the shift lever 1 is a driving D, different gear shift maps are stored according to whether the power switch and the econo switch are operated.

The manual shift state will be described with reference to FIG. 5 and Table 1 as follows.

In the manual shift state, the shift controller 21 detects the current shift stage through the gear position sensor 16, and detects the current vehicle speed from the vehicle speed sensor 18.

Table showing shift conditions button Vehicle condition Shift up button Shift down button 1 operation Engine rpm after shift> Maximum torque rpm Shift up by one step Shift down by one step Engine rpm after shifting <Maximum torque rpm No shifting because the vehicle is not accelerating - Engine rpm after shift> Maximum power rpm - No shifting to protect the engine Engine rpm after shifting <max power rpm Shift up by one step Shift down by one step 2 operation Engine rpm after shift> Maximum torque rpm Shift up by one step Shift down two steps Engine rpm after shifting <Maximum torque rpm Shifting is not possible because the vehicle is not accelerated - Engine rpm after shift> Maximum power rpm - No shifting to protect the engine Engine rpm after shifting <max power rpm Shift up by one step Shift down two steps Working If the vehicle speed decreases from 0 to 5km / h - Downshift to the starting end Simultaneous operation -Start and release button for fault diagnosis function-Perform fault diagnosis step by step each time the shift-up button is pressed once

When the detected current shift stage is not backward and neutral but at the same time there is a vehicle speed, the shift controller 21 shifts a target shift when the shift up button 2 of the shift lever 1 is operated once by a user's finger manipulation. After the gear is set to the current gear speed + 1, it is judged that the gear speed can be shifted by comparing the engine speed after the shift with the maximum torque engine speed and the maximum power engine speed, and when the clutch is operated by the user, the gear shift part 14 ) To increase the speed.

In addition, when the shift down button 3 of the shift lever 1 is operated once, the shift control unit 21 sets the target shift stage to the current shift stage-1, and then sets the engine speed after shifting to the maximum torque. It is judged that the shift is possible compared to the number and the maximum power engine speed, and when the clutch is operated by the user, the gear shift unit is controlled to lower the shift stage.

The shift up button 2 may be operated by two or more times to raise the shift stage by only one step, and the shift down button 3 may be operated twice to decrease the shift stage by two steps. The brake speed is reduced when the brake is operated. Therefore, the shift speed can be lowered by two gears, thereby reducing the number of shifts and providing the driver's convenience.

When the vehicle speed is 0 to 5 km / h when the vehicle is decelerated during driving in a state where the shift up button 2 and the shift down button 3 are not operated, the shift control unit 21 automatically moves to the start stage (ie, the first stage). Shift down. In other words, if the vehicle speed is decelerated during driving between the third and fifth stages and the vehicle speed is 0 to 5 km / h, the vehicle is automatically shifted downward to the starting stage (that is, the first stage).

In addition, the shift control unit 21 performs a failure diagnosis mode when the shift up button 2 and the shift down button 3 of the shift lever 1 are simultaneously operated for a predetermined time (about 5 seconds), and the shift up button When (2) is operated once, the troubleshooting step is performed one step. If the shift up button and the down button are operated simultaneously for a predetermined time (about 5 seconds), the troubleshooting mode ends.

The present invention operates a shift up button and a shift down button with a finger for shifting in a manual shift state, and the shift force is 0.5 kg or less, compared to 1 to 2 kg, which is a shift force when shifting a conventional shift lever with an arm. The shifting speed is greatly reduced, reducing the burden on the driver to operate the shift lever.

In addition, by using the shift up button and the shift down button of the shift lever, an additional switch installation cost for the fault diagnosis switch is reduced.

The control method of the semi-automatic shifting device of a large vehicle according to the present invention includes a shift lever up / down button for shifting up and down a shift stage in a manual shift state, and operates a shift lever button with a finger to change the shift stage in a manual shift state. In this way, it is useful to reduce the load of the shift lever operation to the driver by reducing the shift force for the shift lever operation.

Claims (6)

delete A friction clutch positioned between the engine and the transmission; A gear transmission for shifting a gear of the transmission according to a control signal; Performs automatic shift / manual shift by controlling the gear shift unit according to a user control signal by a shift lever, an accelerator pedal and a clutch pedal, and signals input from a gear position sensor, a clutch position sensor, a vehicle speed sensor, and an engine speed sensor. In the control method of the semi-automatic transmission of a large vehicle composed of a shift control unit, When the manual shift state is selected by the shift lever, the shift control unit changes the target shift stage to "current shift stage" when the shift up button of the shift lever is operated once when the current shift stage is not reverse and neutral. After setting it to +1 ", it is judged that the engine speed can be changed by comparing the engine speed with the maximum torque engine speed and the maximum power engine speed after shifting, and if the clutch is operated by the user, the gear shift part is controlled to raise the speed change stage. A control method for a semi-automatic transmission of a large vehicle, characterized in that for adjusting. The method of claim 2, When the shift down button of the shift lever is operated once, the shift control unit sets the target shift stage to "current shift stage-1", and then compares the engine speed after the shift with the maximum torque engine speed and the maximum power engine speed. And a clutch is operated by a user, the control method of the semi-automatic transmission device for a large vehicle characterized in that the gear shift unit is controlled to adjust the gear shift down. The method of claim 3, wherein And the shift control unit sets the target shift stage to "current shift stage-2" when the shift down button is operated twice. The method of claim 2, The shift control unit decelerates while driving in a state in which the shift up button and the shift down button are not operated, and when the vehicle speed is 0 to 5 km / h, the shift control unit automatically shifts downward to the starting end. Control method. The method of claim 2 The shift control unit controls a semi-automatic transmission device for a large vehicle, characterized in that to perform or terminate the failure diagnosis mode as the shift up button and the shift down button of the shift lever are operated simultaneously for a predetermined time.