JPH055326Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Technical field of the invention This invention relates to a transmission for a vehicle, and in particular to a transmission for a semi-automatic vehicle in which clutch operation for starting and operation of a shift tower are manual.

(b) Prior art and problems A mechanical semi-automatic transmission that combines easy drive and manual operation is disclosed in Utility Application No. 70,608, already proposed to the applicant.
It is shown in the number etc.

In such a transmission, when a driver operates a shift lever on a shift tower to specify a desired gear, the clutch, engine, and transmission are automatically controlled. When the vehicle shifts from running to stopping, the transmission automatically shifts to neutral, thereby preventing the engine from stalling. However, the shift tower remains at the previously set position and is unmatched with the transmission. In this case, the unmatched status of the transmission and shift tower is displayed by lighting a lamp, but if the driver overlooks this display, the shift tower set position is changed to the newly selected position. This may lead to misunderstandings for the driver, and when restarting the vehicle, the shift lever must be returned to neutral and then set to the starting gear, making the operation complicated and impairing the vehicle's easy-driving performance. It was hot.

(c) Purpose of the invention This invention is a solution to the conventional problems mentioned above, and its purpose is to automatically move the shift tower from the shift set position to the neutral position when the vehicle transitions from running to stopped. To provide a transmission device for a vehicle that can be reset, eliminates misunderstandings for drivers, and improves operability.

(d) Structure of the invention: ``In order to achieve this purpose, this invention:
It has a gear change control means that controls the engine rotation, clutch, and transmission to perform a shift change, and the shift gear is changed according to the driving condition of the vehicle based on the shift gear specified by the shift tower or the detection signal from the vehicle speed detection means. In a semi-automatic transmission that changes shifts, a return cylinder is provided to move the shift gear specified by the shift tower to a neutral position, and when the vehicle transitions from running to stopped, the vehicle speed detected by the vehicle speed detection means is a constant value. The present invention is provided with a control means that determines whether the following has occurred, shifts the gear of the transmission to neutral, and moves the shift tower to the neutral position using the return cylinder. (E) Embodiment of the invention Hereinafter, an embodiment of the invention will be explained with reference to the drawings.

1 and 2 show the hardware configuration and control block diagram of one embodiment of this invention. In the figure, the engine 11 is equipped with a mechanical clutch 1.
Transmission 13 is connected via 2,
Its output shaft is connected to a rear axel (not shown) via a propeller shaft 14. Further, the engine 11 is provided with a fuel injection pump 15 .

The clutch 12 is equipped with a clutch stroke sensor 16 that detects whether the clutch is disengaged or engaged based on its stroke amount, and a clutch actuator 17, which is, for example, a pneumatic type, for driving the clutch.

The transmission 13 also includes a countershaft rotation sensor 18 that detects the rotation speed of the countershaft, a vehicle speed sensor 19 that detects the rotation speed of the output shaft, and a transmission actuator that shifts the transmission 13. A shift position sensor 21 is provided to detect the shift position of the yuator 20 and the transmission 13. 22 is a clutch pedal position sensor that detects the position of the clutch pedal 23, 24 is an accelerator pedal, and 25 is an accelerator switching device.

Reference numeral 26 is a shift tower installed in the driver's cab for specifying the shift gear when changing the shift.As shown in Fig. 3, the shift lever 26a can be used to select between reverse R, auto A, 6 ranges from 1st to 6th gear, and A total of 9 ranges can be selected including neutral N, and there are switches (not shown) corresponding to each range inside.
have. Housing 26 of the shift tower 26
Three speed change pattern changeover switches 26c1 to 26c3 are provided on one side of the gearbox b. The shift pattern changeover switches 27c1 to 27c3 change from 1st speed to 2nd speed depending on the loading condition of the vehicle, ie, fixed load, half load, or empty vehicle.
This selects a shift pattern when shifting from 2nd speed to 3rd speed, 3rd speed to 4th speed, 4th speed to 5th speed, and 5th speed to 6th speed.

On the other hand, a control unit 2 that controls the clutch 12 and the transmission 13
7 is a shift change control unit 28 that issues a shift change command when the shift change request condition is satisfied (when the shift position operation etc. is performed normally) based on the signals from the shift tower 26 and the vehicle speed sensor 19; When the shift change command is output from the shift change control section 28, the input from the vehicle speed sensor 19 of the transmission 13 is performed based on the signal from the shift position sensor 21.
A synchronization determination unit 29 calculates the synchronization speed at a designated shift stage and compares the calculated value with the rotation speed (current rotation speed) measured by the countershaft rotation speed sensor 18 to determine the synchronization state. and a transmission control section 31 which receives a synchronization detection signal from the synchronization determination section 29 and issues a drive signal through the transmission actuator 20 and the heli relay box 30.
, a clutch on/off control section 32 that controls the drive of the clutch actuator 17 based on the command from the shift change control section 28, and a clutch control section 32 that controls the accelerator switching device 25 to manually operate the accelerator when the shift change command is output. An engine control section 33 that switches from to auto, and a cylinder control section 43 that performs return control of the shift tower 26 based on a neutral control command from the shift change control section 28 are provided.

The shift change control section 28 outputs an alarm signal to the transmission error lamp 34 or the clutch error lamp 35 when a malfunction occurs in the shift change operation. In addition, the shift change control unit 28 sends signals to the shift completion lamp 37 when the shift change operation is completed, to the double clutch command lamp 38 when a double clutch instruction is issued, and to the buzzer 36 when a shift completion and double clutch instruction is issued. send.

In addition, 39 and 40 are the ON relay of the exhaust brake (exhaust brake) used to quickly synchronize the transmission 13, and the temporary relay when performing a shift change operation while manually operating the exhaust brake. This is an OFF relay for the electric brake to release this, and 4
Reference numeral 1 designates a transmission position indicator for displaying the transmission position, and reference numeral 42 designates a reset button for resetting the transmission error lamp 34, clutch error lamp 35, buzzer 36, etc.

FIG. 4 shows the shift tower 26 in reverse R,
This figure shows a mechanism for automatically returning to neutral N from each shift set position from auto A and 1st to 6th gear ranges, and includes the 〓 and second rotating members 50, 51 arranged orthogonally. The first rotary member 50 is supported by a support portion 52 by a shaft 53 so as to be rotatable in the direction of each of the shift set positions, and the second rotary member 51 is rotatable in the direction of the shift set position. axis 5 in the direction perpendicular to the
It is rotatably supported by 4, and
The first rotating member 50 is formed with an elongated hole 55 that coincides with the rotating direction of the second rotating member 51, and the lower end of the shift lever 26a passing through the elongated hole 55 is provided with the second rotating member 51. A rotating member 51 is fixed.
Therefore, when the shift lever 26a is operated back and forth, left and right, the second and first rotating members 5 are moved accordingly.
1 and 50 are rotated about their respective shafts 54 and 53. Furthermore, return air cylinders 56 and 57 are arranged opposite to each other from the left and right sides of the leg portion 50a of the first rotating member 50, and the return air cylinders 56 and 57 are connected to each other via electromagnetic switching valves 58 and 59. It is connected to an air source (not shown), and a control command signal is applied to the electromagnetic switching valves 58, 59 from the control unit 27.

Next, the operation of this embodiment configured as described above will be explained.

The control operation during traveling when the load is a constant volume will be described based on FIG. First, when starting the vehicle, turn off the clutch 12 at time 61, and turn off the clutch 12 at time 62.
Start engine 11. At time 63, the clutch 12 is turned OFF, the shift tower 26 is changed from neutral to second gear, a shift change command is issued from the shift change control unit 28 to shift from neutral to second gear, and at time 64, the vehicle starts with a half clutch. Shift tower 2 before reaching point 65
6 is switched from 2nd S to auto A, the shift change speed designation switch 2 is set in advance at time 65.
The vehicle speed V when shifting from 2nd to 3rd speed in the shift pattern specified in 6c1 is read out, and the shift change control unit 28 determines that the vehicle speed from the vehicle speed sensor 19 has reached the corresponding V, and the shift change control unit 28 shifts to 2nd speed. The transmission control unit 31 issues a shift change command to shift to 3rd gear from the transmission control unit 31 to the relay box 30.
Transmission actuator 20 through
drive and change the shift. At time 66, the vehicle speed V at which the shift pattern is changed from 3rd gear to 4th gear, which has been specified in advance by the shift change speed designation switch 26c1, is read out, and when the vehicle speed from the vehicle speed sensor 19 has reached this V, the shift change is performed. The control unit 28 makes a determination and issues a shift change command from 3rd gear to 4th gear to change the shift. At time 67, the vehicle speed V at which the shift is to be changed from the 4th gear to the 5th gear designated by the shift change speed designation switch 26c1 is read out, and the shift is changed. Also, at time point 68, the vehicle speed V at which the shift is changed from the 5th to the 6th speed of the shift pattern specified by the shift change speed designation switch 26c1 stored in advance in the memory.
Read out and change the shift.

At time 69, the shift tower 26 is switched from auto to 3rd speed for acceleration, and the shift change control unit 28 issues a shift change command to shift from 6th speed to 3rd speed, and the shift is changed. At time 70, the shift tower 26 is switched from the third speed to the fourth speed, and a shift change command is issued from the shift change control section 28. Similarly, at time 71, the shift tower 26 is shifted from the 4th gear to the 5th gear. Thereafter, when the shift tower 26 is changed from 5th gear to auto A before time 72, the synchronizer determination unit 29 determines at time 72 that the vehicle speed V has become greater than the vehicle speed V specified in advance by the shift change speed designation switch 26cI. Then, a shift change command is issued from the shift change control section 28 to change the shift. At time 73, the vehicle speed V is Vid1
It is determined that the speed has become smaller than e, and the gear is shifted from 6th gear to neutral.

Next, the operation of returning the shift tower 26 to the neutral position will be described.

When the vehicle shifts from running to stopped, when the transmission 13 is shifted to neutral as described above, the program shown in FIG. 6 starts.

That is, the cylinder control section 43 first determines whether the transmission 13 is set to neutral N in step S1. "NO"
If so, the determination in step S1 is repeated, and if ``YES'', it is determined in step S2 which range the shift tower 26 is set to based on the switch signal.
If the gear is set to 1st speed, auto A, 3rd speed, or 5th speed as shown in FIG. 3, the process moves to step S3 to operate the return air cylinder 56, and , reverse R,2
If the gear is set to one of the speed, fourth, and sixth speeds, the process proceeds to step S4, where a process for operating the return air cylinder 57 is executed.

That is, when the shift lever 26a of the shift tower 26 is set to auto A as described above, a switching command is given to the electromagnetic switching valve 58 from the cylinder control section 43 to switch the switching valve 58, and the return air is switched off. Air is supplied to the cylinder 56 from an air source to move the return air cylinder 56 forward. As a result, the rotating member 50 is rotated in the direction of arrow A in FIG. 4, and the shift tower 26 is automatically returned to neutral N.

On the other hand, when the shift tower 26 is set to 4th speed, the electromagnetic switching valve 59 is operated, and the return air cylinder 57 connected thereto is operated forward to move the rotating member 50 in the direction of arrow B in FIG. , and return from 4th gear to neutral N.
Note that once the return of the shift tower 26 to neutral N is completed, the return air cylinder 56,
57 is operated backward.

(f) Effects of the invention As explained above, according to this invention, when the vehicle shifts from running to stopped, the transmission can be shifted to neutral and the shift tower can also be automatically returned to neutral at the same time. Therefore, there is no risk of the driver being misled into thinking that the previously set position of the shift tower is the newly set position, and the operation to return the shift tower to neutral when setting the gear for restarting is eliminated. This can be omitted to improve operability.

[Brief explanation of drawings]

Fig. 1 is a diagram showing the hardware configuration of the vehicle transmission according to this invention, Fig. 2 is a block diagram showing the system configuration, Fig. 3 is a perspective view of the shift tower, and Fig. 4 is a return of the shift tower. FIG. 5 is a perspective view showing the mechanism, FIG. 5 is a diagram showing an example of control during normal driving, and FIG. 6 is a flowchart showing the processing flow of shift tower return operation. 11...Engine, 12...Clutch, 13...
...Transmission, 14...Propeller shaft, 17...Clutch actuator, 18...
Counter shaft rotational speed sensor, 19... Vehicle speed sensor, 20... Transmission actuator, 21... Shift position sensor, 22... Clutch pedal switch, 23... Clutch pedal,
24... accelerator pedal, 25... accelerator switching device, 26... shift tower, 27... control unit, 28... shift change control section,
29... Synchronization determination unit, 30... Relay box, 31... Transmission control unit, 32...
...Clutch engagement control section, 33...Engine control section, 43...Cylinder control section, 50, 51...Rotating member, 52...Supporting section, 53, 54...Shaft, 5
6,57...Return air cylinder, 58,5
9...Solenoid switching valve.

Claims (1)

[Scope of utility model registration request] A semi-automatic transmission device that has a speed change control means that controls the engine rotation, clutch, and transmission to perform a shift change, and that changes the shift position according to the driving condition of the vehicle using the shift position specified by the shift tower. , a return cylinder is provided to move the specified shift stage by the shift tower to a neutral position, and when the vehicle transitions from running to stopping, it is determined that the vehicle speed from the vehicle speed detection means has fallen below a certain value. A transmission for a vehicle, characterized in that it is provided with a control means for setting the gear shift of the transmission to neutral and for moving the shift tower to the neutral position using the return cylinder.