JPS61244949A - Control device for automatic auxiliary reduction gear - Google Patents

Abstract

PURPOSE:To make the depressing force of a clutch pedal constant and to eliminate an overstroke, by providing a clutch pedal operation detecting means and a CPU for controlling both actuators for an auxiliary reduction gear shift and a clutch in accordance with a program. CONSTITUTION:There are provided first and second switches 15, 16, an auxiliary reduction switch 11, and a CPU which carries out computation in accordance with a program stored in a ROM, for controlling both actuators 13, 12 for an auxiliary reduction gear shift and a clutch. With this arrangement, when a clutch pedal 5 is depressed, a cylinder 6, a release cylinder 8 and a release fork 9 are actuated to disengage the clutch. At this time the CPU inhibits the clutch actuator 12 from operating in accordance with the term even if the auxiliary reduction gear switch 11 is operated simultaneously with the depression of the clutch pedal 5. Accordingly, the depressing force of the clutch pedal is not changed to offer no uncomfortable feeling, and it is possible to eliminate an inconvenient overstroke of the clutch 2.

Description

Detailed Description of the Invention (Field of Industrial Application) This invention provides an a1
The present invention relates to a control device for an automatic sub-transmission that performs transmission switching control.

(Prior Art) Conventionally, as a device for automatically switching a sub-shift, there is a device described in, for example, Japanese Patent Laid-Open No. 55-31670.

In a transmission equipped with such an auxiliary shift changeover device, after depressing the clutch pedal and turning off the clutch, the main shift lever is operated to operate the main transmission to perform the main shift, and the auxiliary shift switch is also operated. The clutch actuator is operated based on the output from the sub-shift switch, and after the clutch is turned off, the sub-transmission shift actuator operates the sub-transmission to perform sub-shift. .

However, if the clutch pedal is depressed and the clutch actuator is operated at the same time, the force with which the clutch pedal is depressed changes, causing a sense of discomfort (and problems such as clutch overstroke and the like occur).

(Object of the Invention) This invention aims to eliminate the discomfort by preventing the clutch pedal depression and the actuation of the clutch actuator by the auxiliary transmission means from simultaneously operating by the control means, so that the depression force of the clutch pedal remains unchanged. In addition to being able to
An object of the present invention is to provide a control device for an automatic sub-transmission that can eliminate inconveniences such as clutch overstroke.

(Structure of the Invention) The present invention includes a clutch pedal for releasing a clutch, a sub-transmission means for automatically operating a sub-transmission, and a clutch actuator for releasing the clutch based on a sub-transmission signal from the sub-transmission means. and a detection means for detecting the operation of the clutch pedal, and a control means for prohibiting the operation of the clutch actuator based on a clutch pedal depression detection signal from the detection means. Features.

(Effects of the Invention) According to the present invention, when the clutch pedal is depressed for a main gear changeover operation, the detection means detects the depression operation of the clutch pedal, and the operation of the clutch actuator is prohibited via the control means. Therefore, even if the auxiliary transmission means is operated at the same time as the aforementioned clutch pedal depression for the auxiliary transmission switching operation, the aforementioned clutch actuator will not operate.

As a result, there is an effect that the depression force of the clutch pedal does not change in any way, and no discomfort occurs, and in addition, there is an effect that inconveniences such as clutch overstroke can be eliminated.

(Example) One embodiment of this invention will be described in detail below based on the drawings.

The drawing shows an automatic AJ transmission control device installed in an automobile. In FIG. are intervening.

The above-mentioned clutch 2 is operated by the master cylinder 6 when the clutch pedal 5 in the released state shown in FIG. 1 is depressed.
The hydraulic pressure inside acts on the release cylinder 8 via the oil passage 7, and by operating the release fork 9 with the release cylinder 8, the clutch is disengaged.

Further, the aforementioned main transmission 3 is operated to shift between 1st speed to 4th speed and reverse by a main speed change lever 10 provided in the vehicle interior.

A sub-shift switch 11 is provided near the main shift lever 10 as a sub-transmission means for automatically operating the sub-transmission 4, and by operating the sub-shift switch 11, each gear of the above-mentioned main shift is changed. It is configured to be sub-shifted to either power or economy (focusing on fuel efficiency).

That is, the clutch actuator 12 releases the clutch 2 based on the 1iPJ shift signal from the sub-shift switch 11, and the sub-shift 14 releases the clutch 2 based on the above-mentioned sub-shift signal.
The above-mentioned clutch actuator 12 is connected to the release fork 9, and the above-mentioned auxiliary speed change shift actuator 13 is connected to a shifter 14.

Incidentally, a first switch 15 and a second switch 16, which serve as detection means for detecting the operation of the clutch pedal 5, are disposed at the released position and the depressed position of the clutch pedal 5 mentioned above.

Here, the above-mentioned first switch 15 is set to be turned off when the clutch pedal 5 is released and turned on when the clutch pedal is depressed, and the above-mentioned second switch 16 is set to be turned on when the clutch pedal 5 is depressed to the clutch disengagement point. It is set so that it is turned on and turned off at the release side of the clutch disengagement point.

A control means, that is, a CPU 2, prohibits the operation of the clutch actuator 12 based on a clutch pedal 5 depression detection signal from the above-mentioned detection means formed in this way.
0 is set.

FIG. 2 shows a control circuit of the automatic sub-transmission control device including this CPU 20. The CPU 20 controls the sub-transmission shift actuator 1 according to a program stored in the ROM 17.
3. Drive control of the clutch actuator 12 and use the RAM
18 stores necessary data.

The operation of the control device for the automatic sub-transmission configured as described above will be explained with reference to the flowchart shown in FIG.

In the first step 31, when the above-mentioned auxiliary transmission switch 11 is turned on, the CPU 20 in the next second step 32,
When determining whether the clutch pedal 5 is in the release position and performing only the sub-shift, if the clutch pedal 5 described above is in the release position shown in FIG. 1 and the first switch 15 is turned off. Then, the process moves to the next third step 33.

In this third step 33, the CPU 20 operates the aforementioned clutch actuator 12 in the clutch release direction based on the sub-shift signal, and disengages the clutch 2 via the release fork 9.

Next, in a fourth step 34, the CPU 20 operates the sub-transmission shift actuator 13 based on the above-mentioned sub-transmission signal, and switches the sub-transmission 4 via the shifter 14.

Next, in a fifth step 35, the CPIJ 20 determines whether or not the automatic sub-shift changeover has been completed. When the sub-shift automatic changeover is completed, the CPIJ 20 moves to the next sixth step 36, and in this sixth step 36, the clutch actuator 12 is activated. The clutch is actuated in the clutch connecting direction, and the clutch 2 is brought into the engaged state via the release fork 9, thereby completing the speed change process.

On the other hand, in the second step 32 described above, when it is determined that the clutch pedal 5 is separated from the release position in the depression direction and the first switch 15 is turned on in order to perform the main shift and the sub-shift at the same time. Then, the process moves to the next seventh step 37.

In this seventh step 37, the CPU 20 selects the clutch pedal 5.
It is determined whether the second switch 16 is turned on or not, and when it is determined that the second switch 16 is turned on and the clutch pedal 5 is depressed beyond the clutch disengagement point, the next The process moves to the eighth step 38.

In this eighth step 38, the release cylinder 8 is operated in the clutch release direction, and the clutch 2 is disengaged via the release fork 9.

That is, in this eighth step 38, the control output of the CPLI 20 prohibits the operation of the clutch actuator 12, and only the above-mentioned release cylinder 8 is actuated.

Next, in a ninth step 39, the CPU 20 operates the aforementioned sub-transmission shift actuator 13 based on the sub-shift signal generated by turning on the sub-transmission switch 11, and switches the sub-transmission 4 via the shifter 14.

This switching of the sub-shift 114 is performed together with the main shift switching operation at the main shift selection position of 1st to 4th speed and reverse when the main shift lever 10 switches the main shifts 4 to 13.

Next, in a tenth step 40, the CPU 20 determines whether or not the automatic sub-shift switching has been completed. When the sub-shift automatic switching has been completed, the CPU 20 proceeds to the next eleventh step 41. Based on the release operation of step 5, the release cylinder 8 is actuated in the clutch engagement direction, and the clutch 2 is brought into the engaged state via the release fork 9, thereby completing the speed change process.

In this way, when the clutch pedal 5 is depressed for the main gear changeover operation, the depression operation of the clutch pedal 5 is detected by the first and second switches 15, 16 as detection means, and CPt, 120 is detected. Since the operation of the clutch actuator 12 is prohibited through the switch, even if the sub-shift switch 11 is operated at the same time as the aforementioned clutch pedal 5 is depressed for simultaneous sub-shift switching operation, the above-mentioned clutch actuator 12 will not operate. .

Therefore, the depression force of the clutch pedal 5 does not change in any way, and there is an effect that no discomfort occurs, and in addition,
This has the effect of eliminating inconveniences such as overstroke of the clutch 2.

In the correspondence between the configuration of the present invention and the above-described embodiment, the detection means of the present invention includes the first and second switches 15 of the embodiment.
．． 16, the control means corresponds to the CPU 20, and the auxiliary transmission means corresponds to the auxiliary transmission switch 11, but the present invention is not limited to the depiction of the above-mentioned embodiment.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, and FIG. 1 shows an automatic ti? A system diagram showing the control device of the J transmission,
FIG. 2 is a control circuit block diagram, and FIG. 3 is a flowchart. 2...Clutch 5...Clutch pedal 1
1... Sub-shift switch 12... Clutch actuator 15... First switch 16... Second switch 2
0...CPU Figure 3 70-Child Yard

Claims (1)

[Claims] 1. The device has a main transmission and a sub-transmission, and changes the speed of the transmission when a clutch is released, the clutch pedal for releasing the clutch and the sub-transmission automatically A sub-transmission means for operating the transmission, a clutch actuator for releasing the clutch based on a sub-shift signal from the sub-transmission means, and a detection means for detecting operation of the clutch pedal, the clutch pedal being depressed by the detection means. A control device for an automatic sub-transmission that includes a control means for prohibiting operation of a clutch actuator based on a detection signal.