JPH07167293A - Speed change controller - Google Patents

Abstract

PURPOSE:To quicken a speed change when a driver is necessitated to perform a quick speed change by detecting a moving speed of a speed change lever at a time of speed change operation and, if the moving speed is high, increasing the air pressure for controlling a pneumatic actuator. CONSTITUTION:A pneumatic shift cylinder 40 is operated through ON/OFF control of solenoid valves 42, 44 by means of a controller 34, which receives detection signals from a lever-position sensor 26, a clutch sensor 28, etc., and a speed change of a transmission 36 is controlled via a push rod. In this case a parallel circuit consisting of, an electromagnetic opening/closing valve 64 and a pressure reducing valve 60 is installed in a pressurized air supply pipe line 56 leading from an air tank 52 to the shift cylinder 40. When the electromagnetic opening/closing valve 64 is closed for an ordinary speed change, the pressure of the pressurized air is reduced by the pressure reducing valve 60 and then sent to the shift cylinder 40. On the other hand, when the electromagnetic opening/closing valve 64 is opened because of quick moving speed of a speed change lever 20, the pressurized air, whose pressure is increased, is sent to the shift cylinder 40, thereby making a quick speed change.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift control device for a vehicle such as a bus, and more particularly to a shift control device capable of speeding up a shift when a driver rushes to perform a shift operation.

[0002]

2. Description of the Related Art In a shift control device used for buses and the like,
In response to the switching of the shift lever, the pneumatic actuator of the transmission is operated to switch the gear position of the transmission.

In the conventional shift control device, the operating speed of the pneumatic actuator is constant, the shift time is preset so that the gears in the transmission can be synchronized, and all gear changes are performed at the set time. It is supposed to be done.

[0004]

In certain driving situations,
In such a case, quick gear shifting may be required.In such a case, the conventional gear shift control device takes the same gear shifting time as a normal gear shifting, and the gear shifting according to the driving situation is not performed, and the driver does not It gives a frustrating impression.

An object of the present invention is to provide a shift control device capable of accelerating a shift when the driver needs a quick shift.

[0006]

The present invention will be described using reference numerals in the drawings corresponding to the embodiments. In the shift control device that is the premise of the present invention, the shift lever of the vehicle driver's seat (12) is used.
The pneumatic actuators (40, 46) are operated by the operation of (20), and the gear change of the transmission (36) in the power transmission system from the prime mover to the drive wheels is performed by the pneumatic actuators (40, 4).
Follow step 6). Then, in the shift control device of the present invention,
The moving speed of the speed change lever (20) at the time of operating the speed change lever (20) is detected, and when this speed of movement is high, the air pressure for controlling the pneumatic actuators (40, 46) is increased.

[0007]

When the driver needs a quick shift, the shift lever (20) is quickly operated, so that the moving speed of the shift lever (20) increases. When the moving speed of the speed change lever (20) is high, the air pressure for controlling the pneumatic actuators (40, 46) is increased. As a result, the pneumatic actuator (4
The operating speed of 0, 46) increases, and the transmission (36) shifts faster than usual.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. FIG. 2 is a diagram showing the components of the shift control device of the bus 10 and their wiring diagram. The driver's seat 12 is provided with an instrument panel 14, a steering wheel 16 and a seat 18, and a change lever 20 and a clutch pedal 24 which are manually and foot operated by a driver sitting on the seat 18. . The lever position sensor 26 operates when the change lever 20 is operated by a combination of a Hall IC and a magnet.
Position 20 (In the case of the bus 10 with 5 steps forward, the change lever 20
Is R (reverse), 1 (1st speed), 2 (2nd speed), 3 (3
It has a total of 6 positions: 4th, 4th, and 5th. ) Is detected. Clutch sensor 28
Turns off when the clutch pedal 24 is depressed,
Others are on. The display 30 is provided in the instrument panel 14 and is a transmission detected by the gear position sensor 38.
It displays 36 gear positions and also has an alarm lamp that lights up in the event of an abnormality. Alarm buzzer
32 issues an alarm for erroneous operation or abnormality. Controller 34
Includes a microcomputer, lever position sensor 26
Also, it receives a detection signal from the clutch sensor 28, etc., and calculates whether the engine will not overrun or rotate at a speed lower than idling speed when shifting to the next shift position detected by the lever position sensor 26. A signal is sent to the valves 42, 44, 48, 50 to execute a predetermined gear shifting operation.

The transmission 36 is provided with a power transmission system for transmitting the rotational power of the engine to the drive wheels, and sends the rotational power to the drive wheels at a gear ratio corresponding to the gear position. The gear position sensor 38 detects the gear position of the transmission 36, and when the completion of the shift is detected, the detected value is sent to the controller 34 and the change lever
Since there is no reaction force of 20, the driver can know the completion of the shift. The vehicle speed sensor 39 detects the vehicle speed of the bus 10 from the rotation speed on the output side of the transmission 36, and the detected value is sent to the controller 34, which serves as a basis for calculating whether or not gear shifting is possible. The pneumatic shift cylinder 40 operates in connection with turning on and off of the solenoid valves 42 and 44, and shifts a shift position (not shown) of a shift select shaft (not shown) of the transmission 36 via a push rod 110 (FIG. 5). =
Switch the rotation position). Pneumatic select cylinder 46
Operates in accordance with ON / OFF of the solenoid valves 48, 50 to switch the select position (= axial position) of the shift select shaft of the transmission 36. The transmission 36 is configured to switch the gear position by switching the rotational position and the axial position of the shift select shaft by the pneumatic shift cylinder 40 and the pneumatic select cylinder 46.

The air tank 52 stores pressurized air generated by a compressor of an engine (not shown), is connected to the change lever 20 via a pressurized air supply conduit 54, and also has a pressurized air supply conduit 56. Pneumatic shift cylinder 40 and pneumatic select cylinder of transmission 36 via
Connected to 46. The pressure reducing valves 58 and 60 are provided in the pressurized air supply pipes 54 and 56, respectively, and reduce the air pressure from the air tank 52 to an appropriate value and send it to the change lever 20 and the transmission 36 side. The change lever reaction force solenoid valve 62 is provided in the pressurized air supply line 54 and is provided with a controller.
The pressurized air supply line 54 is opened and closed by the control signal from 34,
When the change lever 20 is about to move from N (neutral) to the shift destination position due to a shift change,
The gears of the transmission 36 are still overrun,
When the gear change in 36 cannot be performed, the pressurized air supply line 54 is opened to send the pressurized air from the air tank 52 to the change lever 20 to give resistance to the operation of the change lever 20, and the transmission When the 36 gears have been shifted, the resistance is weakened to inform the driver that the gear shifts have been completed.

The solenoid valves 42 and 44 are pneumatic shift cylinders.
The air pressure chambers 112 and 114 are provided corresponding to the air pressure chambers 112 and 114 (FIG. 5) of 40. When the air pressure chamber 112 is on, the pressurized air from the air tank 52 is flown to the air pressure chambers 112 and 114, and when the air pressure chamber is off, the air pressure chambers 112 and 114 are supplied. 11
Open 2,114 to the atmospheric space. Similarly, solenoid valves 48, 50
Is provided corresponding to each pneumatic chamber (not shown) of the pneumatic select cylinder 46, and when on, the air tank
Pressurized air from 52 is sent to each pneumatic chamber, and when it is off,
Open each pneumatic chamber to the atmospheric space.

The electromagnetic opening / closing valve 64 is provided in parallel with the pressure reducing valve 60 and is opened / closed by a control signal from the controller 34. When the electromagnetic opening / closing valve 64 is closed, the pressurized air from the air tank 52 is depressurized to a predetermined value in the depressurization valve 60, and then sent to the pneumatic shift cylinder 40 and the pneumatic select cylinder 46, and those The control air pressure is a normal value (small). On the other hand, the solenoid on-off valve
When 64 is open, the pressurized air from the air tank 52 is sent to the pneumatic shift cylinder 40 and the pneumatic select cylinder 46 via 58 without the depressurization process in the depressurization valve 60, and for controlling them. Air pressure is increased (greater).

FIG. 3 shows gear positions in the transmission 36. In this case, the transmission 36 has five forward gears and one reverse gear, and R, 1, 2, 3, 4, and 5 are reverse gears, first gear, and two gears, respectively.
Compatible with 3rd, 4th, and 5th speed. Each gear position is
Corresponds to the position of the shift select shaft of the transmission 36.
That is, in FIG. 3, the straight line extending to the left and right corresponds to N (neutral), and the shift select shaft is R,
At the time of 2,4 and at the time of 1,3,5, the gear positions are achieved by rotating in the opposite directions with respect to N (displacement in the shift direction). Further, the shift select shaft is displaced in the select direction (corresponding to the straight line extending in the left-right direction in FIG. 3) with respect to the N position in the shift direction, and the first position in the select direction corresponds to R and 1. , The second position corresponds to 2, 3 and the third position corresponds to 4, 5. Then, at each shift position, the switch is turned on by the combination of the Hall IC and the magnet.

FIG. 4 shows a gear position and a pneumatic shift cylinder.
6 is a table showing a relationship between ON / OFF of solenoid valves 42 and 44 for 40. In FIG. 4, the solenoid valve is the solenoid valve 42,
Corresponding to 44, ○ and × indicate ON and OFF, respectively. Turning on / off of the solenoid valves 42 and 44 means turning on / off of the first electromagnetic coil 78 in FIG. 3, and is irrelevant to turning on / off of the second electromagnetic coil 90. When the shift select shaft is set to N, the solenoid valves 42 and 44 are both turned on, and when the shift select shaft is displaced in the shift directions R, 2, 4 with respect to N, the solenoid valves 42 and 44 are set.
Are turned on and off respectively, and when they are displaced to the 1, 3, 5 side, the solenoid valves 42, 44 are turned off and on, respectively.

FIG. 5 is a diagram showing the structure of the pneumatic shift cylinder 40 in three operating positions. The upper stage, the middle stage, and the lower stage respectively correspond to the shift positions of 1, 3, 5 and N, and the shift positions of R, 2, 4 of the shift select shaft. An annular stopper 102 is fitted on the inner peripheral side of the cylinder body 100. Outer piston 104, 10
6 are respectively positioned on both sides in the axial direction with respect to the stopper 102, slide the cylinder body 100 in the axial direction, and are restricted in displacement by abutting against the stopper 102. The inner piston 108 is
Axial displacement with respect to the outer pistons 104, 106 is restricted by sliding on the inner peripheral sides of the outer pistons 104, 106 in the axial direction and abutting against the inward projections at the ends of the outer pistons 104, 106. One end of the push rod 110 is connected to the inner piston 108 and is axially displaced integrally with the inner piston 108, and the other end of the push rod 110 is connected to the shift select shaft to rotate the shift select shaft. Allow (displace in the shift direction). The pneumatic chambers 112 and 114 are
The cylinder body 100 is formed on both sides with respect to the inner piston 108, and pressurized air is supplied when the solenoid valves 42 and 44 are turned on.

When changing the gear of the transmission 36, first,
Set the shift select shaft to N in the rotation direction (shift direction).
In order to displace to, the solenoid valves 42 and 44 are both turned on,
Operate the pneumatic shift cylinder 40. This allows
Both the air pressure chambers 112 and 114 are supplied with pressurized air so that the outer pistons 104 and 106 come into contact with the stoppers 102, and the inner piston 108 is entrained by the outer pistons 104 and 106, and the inner piston 108 inside the cylinder body 100 Center position (Fig. 5)
Middle position). Next, the pneumatic select cylinder 46 is operated to move the shift select shaft to the axial position (select direction position) corresponding to the new gear position, and then only one of the solenoid valves 42 and 44 is turned off. Solenoid valve 42,
If 44 is turned on and off respectively, pneumatic chamber 112
Is discharged with pressurized air, the pneumatic chamber 114 is supplied with pressurized air, the pneumatic chambers 112 and 114 are respectively contracted and expanded, and the inner piston 108 pushes the push rod 110 into the cylinder body 100.
When pushed out, the shift select shaft rotates to the 1, 3 and 5 sides. When the solenoid valves 42 and 44 are turned off and on, respectively, the pneumatic chamber 112 is supplied with pressurized air, the pneumatic chamber 114 is evacuated of pressurized air, and the pneumatic chambers 112 and 114 are respectively expanded and contracted, The inner piston 108 pulls the push rod 110 into the cylinder body 100 (the lower position in FIG. 5), and the shift select shaft rotates to the R, 2, 4 side.

FIG. 6 is a table showing the relationship between the gear position and the ON / OFF states of the solenoid valves 48, 50 for the pneumatic select cylinder 46. In Fig. 6, the solenoid valve is the solenoid valve 4
Corresponding to 8 and 50, ○ and × indicate on and off respectively.
Solenoid valves Solenoid valves 48, 50 are turned off and on respectively when the shift select shaft is in the select direction R, 1 position, and are both turned on when they are in the select direction 2, 3 positions. When they are located in the select directions 4 and 5, they are turned on and off, respectively.

FIG. 1 is a flowchart of the shift control routine. In step S10, it is determined whether or not the clutch pedal 24 is depressed based on the input from the clutch sensor 28. If the determination result is YES, step S10
If it is NO, the routine ends. In step S12, it is determined whether or not the position of the change lever 20 has been changed based on the input from the lever position sensor 26, and if the determination result is YES, the time from the position before the shift to the position after the shift is determined. The calculation is performed by the microcomputer, and the process proceeds to step S14. If NO, the routine ends.

In step S14, it is determined whether the moving speed of the change lever 20 during the shift change by the driver is fast or slow. The moving speed can be detected by measuring the time until the output of the lever position sensor 26 changes from the old position to the new position. If the moving speed is fast, that is, if the driver hurriedly operates the change lever 20, the process proceeds to step S16, and if the driver is slow,
That is, when the driver operates the change lever 20 at a normal speed, the process proceeds to step S18. Step S16
Now, turn on the solenoid on-off valve 64 and open it to open the air tank 52.
The pressurized air from is sent to the pneumatic shift cylinder 40 and the pneumatic select cylinder 46 without reducing the pressure.
As a result, the pneumatic shift cylinder 40 and the pneumatic select cylinder 46 are supplied with a large (= increased) control air pressure when the solenoid valves 42, 44, 48, 50 are on, and increase the operating speed. . On the other hand, step S1
In 8, the solenoid on-off valve 64 is turned off and closed, and the air tank
After depressurizing the pressurized air from 52 with the pressure reducing valve 60, the pneumatic shift cylinder 40 and pneumatic select cylinder 46
Send to Accordingly, the pneumatic shift cylinder 40 and the pneumatic select cylinder 46 are connected to the solenoid valves 42, 44, 48,
When 50 is on, it receives a small (= normal value) control air pressure and operates at normal operating speed. Step S1
After executing 6 or S18, the process proceeds to step S20.

In step S20, the solenoid valves 42 and 44 are both turned on, the pneumatic shift cylinder 40 is operated, and the shift select shaft of the transmission 36 is shifted (rotated) to the N position. In step S22, the solenoid valves 48 and 50 are set as shown in FIG.
As described above, the on / off is controlled to operate the pneumatic select cylinder 46, and the shift select shaft is selected (axial displacement) to the select position corresponding to the new position. In step S24, the pneumatic shift cylinder 40 is operated again to shift the shift select shaft from the N position to the new position.

[0021]

According to the present invention, when the driver needs a fast gear shift, the operating speed of the pneumatic actuator for changing the gear of the transmission is made faster than usual.
The gear change of the transmission can be performed at the speed desired by the driver.

[Brief description of drawings]

FIG. 1 is a flowchart of a shift control routine.

FIG. 2 is a diagram showing each device of the bus shift control device and its wiring diagram.

FIG. 3 is a diagram showing gear positions in the transmission.

FIG. 4 is a table showing a relationship between a gear position and ON / OFF of a solenoid valve for a pneumatic shift cylinder.

FIG. 5 is a diagram showing the structure of a pneumatic shift cylinder in three operating positions.

FIG. 6 is a table showing a relationship between a gear position and ON / OFF of a solenoid valve for a pneumatic select cylinder.

[Explanation of symbols]

12 Driver's seat (vehicle driver's seat) 20 Change lever (shift lever) 36 Transmission 40 Pneumatic shift cylinder (pneumatic actuator) 46 Pneumatic select cylinder (pneumatic actuator) 60 Pressure reducing valve 64 Electromagnetic on-off valve

Claims (1)

[Claims] 1. A gear change of a transmission (36) in a power transmission system from a prime mover to a drive wheel by operating a pneumatic actuator (40, 46) by operating a shift lever (20) of a vehicle driver's seat (12). In the speed change control device that performs the pneumatic actuator (40, 46), detects the moving speed of the speed change lever (20) at the time of operating the speed change lever (20), and if the speed of movement is high, A shift control device characterized by increasing air pressure for controlling the pneumatic actuators (40, 46).