JPS63115950A - Speed change control device for vehicle - Google Patents

Abstract

PURPOSE:To ensure the operability of a gas actuator fevorably by inhibiting the following speed change operation during a designated period of time after speed change operation conducted by the gas actuator. CONSTITUTION:A gas actuator 7 is provided for a sub-transmission C, and during a designated period of time after the completion of shift operation of the sub-transmission C conducted by a gas actuator 7, the operation of the sub-transmission C is inhibited. Thus, in the meantime, a vacuum pump 18 is driven to supplement vacuum required for the following shift operation in a vacuum tank 15, so that after the lapse of a designated time, the gas actuator 7 can be reliably operated to ensure favorable operability.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vehicle shift control device that operates a pneumatic actuator to engage and disengage a clutch and change a shift gear upon receiving a shift command. It is.

[Prior art] As a transmission for vehicles such as trucks, it is possible to switch between two modes called power and economy for a main transmission that performs dT for normal gears (for example, 1st to 5th speeds and reverse). Transmissions that are equipped with an auxiliary transmission to enable selection of gears suited to more operating conditions are well known and are actually widely used.

By the way, in a type of transmission where the main transmission is operated manually, if the auxiliary transmission is also operated manually, is the overall operation too difficult? To become U1,
A system has been proposed in which the auxiliary transmission can be operated with a single touch, and for this purpose, a pneumatic actuator is used to engage and disengage the clutch and change the speed change gear (see Japanese Patent Laid-Open Publication No. 58-225248).

In that case, the vacuum and compression pressure that act as the operating source for the gas actuator will be supplied by a compressor or air pump mounted on the vehicle. However, in general vehicles, the capacity of the installed compressor or air pump cannot be increased very much,
supply! :i1 has a limit. Therefore, if the above-described operation of the sub-transmission is repeated within a short period of time, the effective pressure required as an operating source may not be obtained, leading to malfunction.

[Object of the Invention] An object of the present invention is to ensure the operability of the pneumatic actuator in a vehicle shift control device in which gears are changed by operating the pneumatic actuator as described above.

[Structure of the Invention] Therefore, the present invention provides a speed change control device for a vehicle in which, in response to a speed change command, a pneumatic actuator performs disengagement/disconnection of a clutch and switching of a speed change gear. The present invention provides a gear shift control device for a vehicle, characterized in that an operation inhibiting means for inhibiting the next gear shift operation for a certain period of time is provided.

[Effects of the Invention] According to the present invention, the operation of the gas actuator is prohibited for a predetermined period of time after a gear shift operation, and during this period, the vacuum and compression pressure as an operating source are filled with Mi. After the lapse of time, the gas actuator can be operated reliably, and good operability can be ensured.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the accompanying drawings.

As shown in the system configuration in FIG. 1, the transmission 1 has a built-in clutch A in the front stage that connects and disconnects the engine output shaft (not shown), and a rear stage that changes speeds such as 1 to 4 speed and reverse. The basic configuration includes a main transmission B having gears, and an auxiliary transmission C interposed between the clutch A and the main transmission B, which can be switched between a power mode and an economy mode.

The clutch A has a clutch operating lever 3 that disengages the clutch pedal 2 in conjunction with depression of the clutch pedal 2, and a clutch consisting of a diaphragm type pneumatic actuator is connected to the clutch operating lever 3. An actuator 4 is provided.

On the other hand, the main transmission B is adapted to perform a gear change operation using a change lever 5, and an opening select switch 6 is attached to the lower side of the knob of the change lever 5. This opening select switch 6 is for selectively switching between power mode and economy mode, and is for operating an opening actuator 7, which is a diaphragm-type pneumatic actuator, provided for the sub-transmission C. Generates a sub-liquid switching signal. This opening actuator 7 is linked to a sleeve gear 8 of the sub-transmission C, and by operating the sleeve gear 8, the mode of the sub-transmission C is switched.

In addition, in order to detect the operating state of the clutch A1, main transmission B, and auxiliary transmission C, the clutch disengagement detection switch 11 is activated for the clutch operation lever 3, and the clutch disconnection detection switch 11 is activated for the change lever 5 of the main transmission @B. Seihen position switch 1
2, a subsidiary position switch 13 is provided for each opening actuator 7, and these switches 11, 12, 13 and the opening select switch 6 are connected to a controller 14 consisting of a microcomputer. .

The controller 14 also receives outputs from a vehicle speed sensor and an accelerator opening sensor, respectively, and is configured to actuate a solenoid provided for the clutch actuator 4, as will be explained in detail later. Solenoid operated power mode opening valve PV provided for clutch valve CV and opening actuator 7
and the economy mode opening valve EV are electrically controlled.

In this embodiment, the above-mentioned actuators, that is, the clutch actuator 4 and the opening actuator 7, are of the type operated by vacuum supplied from the vacuum tank 15, respectively.

The vacuum tank 15 is equipped with a vacuum pump 1 driven by a DC motor 17 powered by an onboard battery 16.
Vacuum is supplied from 8 through a check valve 19. The motor 17 is turned on and off by a pressure switch 20 that detects the vacuum pressure in the vacuum tank 15. When the vacuum pressure drops below a set value, the motor 17 is turned on and the vacuum pressure in the vacuum tank 15 is increased. is maintained at a predetermined pressure.

The clutch actuator 4 is partitioned into a vacuum chamber 4b and an atmospheric chamber 4C by a diaphragm 4a, and in the vacuum chamber 4b is a spring 4e that always biases an operating rod 4d whose base end is attached to the diaphragm 4a in the connection direction. is built-in. And clutch valve C
When v is switched from the atmosphere side to the vacuum side in response to a command from the controller 14, the diaphragm 4a is displaced by the vacuum from the vacuum tank 15 so as to pull in the operating rod 4d against the spring force of the spring 4e. Operate the operating lever 3 in the cutting direction.

On the other hand, the opening actuator 7 is partitioned by a diaphragm 7a into a power mode vacuum chamber 7b and an economy mode vacuum chamber 7c. The opening valves P■ and Ev are turned on by the controller 14 according to the mode as shown in the table below.

For example, in the power mode, vacuum is introduced into the power mode vacuum chamber 4b and atmospheric pressure is introduced into the economy mode vacuum chamber 4c, so that the operating rod 4d whose base end is fixed to the diaphragm 4a is retracted. The diaphragm 4a is displaced so that the sub-transmission C can be switched to the power mode.

Opening valve control ×: not used Next, FIGS. 2 and 3 show the control program for the sub-transmission C executed by the controller I4.

This will be explained with reference to the flowchart shown in FIG.

As shown in the main routine in Figure 2, when the control is started, the system is initialized in step #1, and the timer T for setting the prohibition time set in the program is set to "0".
At the same time, the prohibition flag F is set to "0" (step #2). In step #3, the signals of the various switches (clutch disconnection switch 11, system select switch 6, raw change position switch 12, auxiliary change position switch 13) and the outputs of the vehicle speed sensor and accelerator opening sensor are read, and step #4 In step #5, a subroutine for opening shift control is executed, and then in step #5, a subroutine for clutch control is executed.

As shown in FIG. 3, in the above-mentioned sub-liquid shift control subroutine #4, first, in step #ll, it is determined whether or not the prohibition time setting timer T is "0", and if T=0, step #ll is performed.
12, the mode selected by the system select switch 6 is read, and it is determined in step #13 whether or not the power mode has been selected, and if it is the power mode, the mode selected by the system select switch 6 is read.
At step 14, the select flag S is set to "0". If the power mode is not selected, that is, if the economy mode is selected, select flag S is set to FF in step #I5.
'''.

Next, in step #16, the opening position switch 13
Read the output of , and if it is power mode, set the position flag P to “0” Steps #I7-#18
), if not in power mode, position flag P
is set to "FF" (step #I7→#19).

In the next step #20, the exclusive OR of the select flag S and the position flag P is calculated (M=5G)P, and in step #21 it is determined whether M=O or not. This judgment is
This is to determine whether or not the opening shift control of - times has been completed. For example, if the power mode is selected by the system select switch 6 (S=O) and the mode detected by the system position switch 13 is When in power mode (
P=0) and M=0, and it is possible to detect the completion of one sub-shift control.

When M≠0, the opening shift operation is not prohibited, so the switching flag F is set to "FF" in step #22.
After setting it to , read the on/off status of the clutch disconnection switch 11 in step #23, and if it is on, that is, if clutch A is disconnected, then step #24 to step #2
Proceeding to step #5, it is determined whether the select flag S is "0" or not. If the select flag S is "0", that is, when the power mode is selected, the opening degree for the power mode is determined in step #26. Valve PV is energized and economy mode opening valve EV is de-energized. In other words, a shift operation is performed from economy mode to power mode.

On the other hand, when the economy mode is selected, in step #27, the power mode opening valve PV is de-energized, the economy mode opening valve EV is energized, a shift operation from power mode to economy mode is performed, and step At #28, clutch flag CF is set to "0".

Note that if the clutch disconnection switch 11 is off in step #24, skip to step #28,
Set clutch flag CF to "0".

On the other hand, when M=O, that is, when - times of secondary shift control have been completed, the process proceeds from step #21 to step #29, where it is determined whether or not the prohibition flag F is "FF". PF"", in step #30, a predetermined prohibition time ε is set in the prohibition timer T, and
Clear the prohibition flag F (F←0). Further, if the prohibition flag F is not "FF", step #30 is skipped and the process proceeds to step #31, where both attitude valves PV
, EV are simultaneously de-energized. That is, the system actuator 7 is held in its neutral position.

Then, in step #32, the clutch flag C
Set F to “B”.

In other words, when one opening shift operation is completed, M=O
As a result, the prohibition timer T is set, the system actuator 7 is placed in the neutral state, and the clutch flag CF is set to "bi", thereby making the clutch A inoperable.

After that, the prohibition timer T is decremented by "bi" in step #33 (T4-T-1), and this prohibition continues until the prohibition timer Th<O. Then, the prohibition timer T becomes "0".
Then, the control from step #12 onward as described above will be performed.

The last step of the secondary shift control (#28, #
In the clutch control shown in FIG. 4, the clutch flag C is set in accordance with the clutch flag CF set in
It is determined in step #40 whether F is "0" or not, and if it is "0", clutch valve CV is excited in step #41 and clutch A is disconnected immediately before the shift operation of sub-transmission C. However, if not, the clutch valve CV is de-energized (step #42).

As described above, in the present invention, the opening shift operation is prohibited for a predetermined prohibition time after the end of the shift operation of the sub-transmission C, and during that time, the vacuum pump 18 is driven, and the vacuum tank 15 has the following The vacuum necessary for the opening shift operation will be replenished, allowing the next systematic shift to be carried out smoothly.

In addition, in the above, the gas actuator was driven by a vacuum, but instead of a vacuum pump, a compressor was used,
It may also be driven by positive pressure.

[Brief explanation of the drawing]

FIG. 1 is a system configuration diagram according to an embodiment of the present invention, and FIG.
Figures 3 and 4 are flowcharts of the control programs executed by the controllers, respectively. Figure 2 shows the main routine, Figure 3 shows the system shift control subroutine, and Figure 4 shows the crud control subroutine. show. A...Clutch, B...Main transmission, C...
・Sub-transmission, ・1... Clutch actuator, 7... System actuator, CV... Clutch valve, PV... Opening valve for power mode, EV... Opening valve for economy mode , 14...controller, 15...vacuum tank.

Claims (1)

[Claims] (1) In a vehicle shift control device that uses a pneumatic actuator to engage and disengage a clutch and change gears in response to a shift command, after a shift operation by the pneumatic actuator, the next shift operation is performed for a predetermined period of time. 1. A vehicle speed change control device, characterized in that it is provided with means for inhibiting operation.