JP3720188B2 - Clutch automatic control vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic clutch control vehicle using a shift operation detecting means in a shift operation system.
[0002]
[Prior art]
In some vehicles, a friction clutch is used as the clutch itself, but the connection / disconnection drive is not performed manually but automatically by a signal from a controller. Such a vehicle will be referred to herein as a clutch automatic control vehicle.
In an automatic clutch control vehicle, for example, a shift lever having a built-in switch is sometimes used in order to automatically connect and disconnect the clutch by detecting a shift operation of the driver. In this case, when the driver applies a force to the shift lever to shift the gear, the switch is first turned on to detect the driver's intention to shift. When the controller receives the switch-on signal, the clutch is disengaged in preparation for gear-in. After being in such a state, the gear is shifted.
[0003]
FIG. 3 is a block diagram of a conventional clutch automatic control vehicle. In FIG. 3, 1 is a shift lever, 2 is a clutch control switch, 3 is a brake switch, 3A is a parking brake switch, 4 is a brake pedal, 4A is a parking brake, 5 is a controller, 6 is a clutch pedal sensor, and 7 is a clutch. Pedal, 8 is master cylinder, 9 is accelerator opening sensor, 10 is accelerator pedal, 11 is engine, 12 is engine rotation sensor, 13 is clutch, 14 is gear position sensor, 15 is release fork, 16 is transmission, 17 is Transmission rotation sensor, 18 is a hydraulic pipe, 19 is a clutch hydraulic actuator, 20 is a slave cylinder, 21 is a rod, 22 is a clutch position sensor, 23 is a key switch, 24 is a battery, 25 is a system switch, and 26 is a system battery. .
[0004]
The brake switch 3, the parking brake switch 3A, the clutch pedal sensor 6, and the accelerator opening sensor 9 detect whether or not each corresponding pedal has been operated, or the degree of depression. The detection signal is sent to the controller 5. The gear position sensor 14 detects the current gear position in the transmission 16, and the clutch position sensor 22 detects the clutch position (clutch stroke) between the clutch disengagement and the clutch engagement. The transmission rotation sensor 17 detects the number of rotations of the counter shaft of the transmission 16. The vehicle speed can be obtained by converting the rotational speed in consideration of the gear ratio and the like. Detection signals from these sensors are also sent to the controller 5. The controller 5 is configured as a computer.
[0005]
The clutch hydraulic actuator 19 is an actuator that controls disengagement and engagement of the clutch based on a control signal from the controller 5. In this example, the clutch 13 can be controlled automatically by a signal from the controller 5 or can be controlled by the clutch pedal 7. Therefore, a clutch hydraulic actuator 19 is inserted in the middle of the hydraulic pipe 18 from the master cylinder 8 of the clutch pedal 7 to the slave cylinder 20 of the clutch 13.
[0006]
The clutch control changeover switch 2 is a switch for switching whether the clutch 13 is automatically controlled or manually (by the clutch pedal 7). When switched to the manual side, the hydraulic pressure from the clutch pedal 7 is transmitted to the slave cylinder 20. When switched to the automatic side, a pump or the like (not shown) in the clutch hydraulic actuator 19 is operated by a signal from the controller 5, and the hydraulic pressure is transmitted to the slave cylinder 20 (in this case, the clutch pedal 7 is depressed). However, the hydraulic pressure is not transmitted to the slave cylinder 20).
[0007]
As a means for detecting the shift operation of the automatic clutch control vehicle, the shift lever 1 having the shift knob switch as described above may be used.
FIG. 4 is a diagram illustrating a shift lever with a shift knob switch. Reference numerals correspond to those in FIG. 3, 30 is a shift knob, 31 and 32 are shift knob switches, 33 is a lever portion, and 34 is an electric wire. 4A shows a stationary state, and FIGS. 4B and 4C show a state in which a force in the shift direction as indicated by an arrow is applied to the shift knob 1, respectively.
[0008]
Shift knob switches 31 and 32 are built in the shift knob 30 , and ON / OFF signals of these switches are sent to the controller 5 through the electric wires 34. When any one of the switches is turned on, the controller 5 issues a control signal for disconnecting the clutch to the clutch hydraulic actuator 19.
The shift knob 30 is tilted to a predetermined angle independently of the lever portion 33 when a force in the shift direction is applied, and returns to its original position with a spring (not shown) when the applied force disappears. Is made. When tilted, one of the shift knob switches is turned on.
[0009]
Therefore, when a force is applied to shift in the direction of the arrow as shown in FIG. 4B, first, only the shift knob 30 is tilted by a predetermined angle in that direction, for example, the shift knob switch 32 is turned on. When further force is applied, the lever 33 is tilted in the shift direction, and the gear is shifted. . FIG. 4 (c) shows a case where shifting is to be performed in the reverse direction, and at this time, the shift knob switch 31 is turned on.
When the control of the clutch is automatically switched, the shift knob switches 31 and 32 indicate the intention of the gear shift before the driver performs the gear shift and before the gear shift is actually performed. It is for detection. The controller 5 to which this detection signal has been input immediately causes the clutch hydraulic actuator 19 to disengage the clutch and prepares the gear shift.
In the above example, the shift knob provided with the shift knob switch for detecting the shift operation is shown, but the shift operation detecting means may be provided in another part of the shift operation system. For example, it may be provided in the middle of a shift linkage or the like, or may be provided on a transmission shift fork or the like.
[0010]
[Problems to be solved by the invention]
(problem)
However, as in the conventional clutch automatic control vehicle described above, when that gear in parking on a slope or the like without pulling the parking brake, when in contact with the knob of the shift lever accidentally, there is that the vehicle would start moving There was a problem.
[0011]
(Explanation of problem)
In the case where the clutch control is switched to automatic, the controller has conventionally received a signal from a shift operation detecting means such as a shift knob switch as long as the key switch is turned on. That is, when an ON signal is input from a shift operation detecting means such as a shift knob switch, the controller disengages the clutch.
Therefore, for example, when gear-in parking is performed on the way of a hill (parking with the gears not in neutral but in a traveling stage such as two stages), if the key switch is turned on, the shift operation detecting means such as a shift knob switch is detected. As long as it is turned on, the clutch is disengaged. When the driver inadvertently touches the knob of the shift lever, for example, trying to remove an object in the driver's seat, the shift operation detecting means such as a shift knob switch is turned on and the clutch is disengaged.
When the clutch is disengaged, the connection between the wheel and the engine is released, so the vehicle may start to move due to its own weight.
An object of the present invention is to solve the above problems.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the present invention, the shift operation system is provided with a shift operation detecting means , and the disconnection / contact of the friction clutch disposed between the engine and the transmission is the signal of the shift operation detecting means. In the automatic clutch control vehicle automatically controlled by the controller, the controller does not accept the signal of the shift operation detecting means when the engine is not started after the key switch is turned on, but when the engine is experienced after the key switch is turned on. Decided to do.
[0013]
(Summary of actions to be resolved)
The controller that issues a clutch disconnection / contact command does not accept the shift operation detection signal output from the shift operation detection means provided in the shift operation system when the engine is not started after the key switch is turned on. Accept if you have experience in starting.
By doing so, it is possible to prevent a situation in which the vehicle starts to move even if it touches the knob of the shift lever accidentally before starting the engine when gear-in parking on a hill or the like.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Here, a description will be given of an example using a shift lever with a shift knob switch as the shift operation detecting means.
FIG. 1 is a block diagram of an automatic clutch control vehicle according to the present invention. Reference numerals correspond to those in FIG. 3, and 5-1 is a knob switch valid flag. 3 are the same as those in FIG. 3, and the description thereof is omitted. In the present invention, a knob switch valid flag 5-1 is newly installed in the controller 5.
[0015]
The knob switch valid flag 5-1 is a flag that is set when the engine is first started after the key switch 23 is turned on and reset when the key switch 23 is turned off. The operating power for setting and resetting the flag is supplied from the system battery 26.
In the present invention, the controller 5 does not accept the shift knob switch signal from the time when the key switch 23 is turned on until the start of the engine is completed. However, if an engine stall occurs during operation, restarting operation may be hindered. Therefore, once the key switch 23 is turned on, the shift knob switch signal is accepted at any time if the engine has been completely started. In order to perform such control, the knob switch valid flag 5-1 is used.
[0016]
FIG. 2 is a flowchart for explaining shift knob switch signal reception control in the present invention. This control is performed in the controller 5.
Step 1: Check whether the key switch 23 is on. If not, wait for it to turn on.
Step 2: If the key switch 23 is not turned on, the knob switch valid flag 5-1 is reset.
Step 3... When the key switch 23 is on, the knob switch valid flag 5-1 is checked to check whether the flag has already been set. If it has already been set (which means that the engine has once been started), the process proceeds to step 7 (the shift knob switch signal is always accepted).
[0017]
Step 4: If the knob switch valid flag 5-1 is not set, the acceptance of the shift knob switch signal is stopped.
Step 5: Check whether the engine has been started. The confirmation is performed based on whether or not the detected rotation speed from the engine rotation sensor 12 has reached a predetermined value that is recognized as the start completion. If the start is not completed (this includes the case where the start is not yet attempted), the control is returned (return to step 1).
Step 6: When starting is completed, the knob switch valid flag 5-1 is set.
Step 7: After the knob switch valid flag 5-1 is set, the controller 5 starts accepting the shift knob switch signal. That is, if a shift knob switch ON signal is input, a clutch disconnection command is issued to the clutch hydraulic actuator 19.
[0018]
By controlling the reception of the shift knob switch signal (that is, the reception of the clutch disengagement request) as described above, the engine has never been started by turning on the key switch 23 (key switch). The difference between the case where the engine has not started after turning on) and the case where the engine has been started once after turning on (2) (when the engine has been started after turning on the key switch) is as follows: It can be tightened.
[0019]
(1) When the engine is not started after the key switch is turned on Even if the shift knob switch-on signal is inputted to the controller 5, it is not accepted (if the key switch 23 is turned on and the engine has not been started yet) In addition, the clutch is not disengaged even if the shift lever switch-on signal is inadvertently touched by the shift lever 1. Therefore, the vehicle does not start even when the gear-in is parked.
[0020]
(2) If the engine has been started after the key switch is turned on, the signal of the shift knob switch on is always accepted by the controller. (This caused an engine stall during operation and operated the shift lever 1 for restart. In this case, the controller 5 immediately accepts the shift knob switch-on signal and commands the clutch disengagement, so that the restarting operation of the engine is not hindered.)
[0021]
The present invention as described above is very effective in preventing erroneous operation when gear-in parking on a slope. In other cases (for example, when parked on a flat ground), no particular effect is exhibited, but no inconvenience occurs.
In the above-described embodiment, the shift knob switch is used as the shift operation detecting means. However, the shift operation detecting means may be used in other parts of the shift operation system (for example, in the middle of the shift linkage or the transmission shift fork). Etc.) may be provided.
Further, in the above example, a manual clutch pedal 7 is also provided as the clutch control means. However, since the present invention is not related to the presence of the clutch pedal 7, it is not necessary to provide it. Absent.
[0022]
【The invention's effect】
According to the clutch automatic control vehicle of the present invention, the controller that issues the clutch disengagement / contact command outputs the shift operation detection signal output from the shift operation detection means provided in the shift operation system after the key switch is turned on. Not accepted, but accepted if the engine has been started after the key switch is turned on.
For this reason, when gear-in parking is performed on a hill or the like, it is possible to prevent a situation in which the vehicle starts to move when it accidentally contacts the knob of the shift lever before starting the engine.
[Brief description of the drawings]
FIG. 1 is a block diagram of an automatic clutch control vehicle according to the present invention. FIG. 2 is a flowchart for explaining shift knob switch signal reception control in the present invention. FIG. 3 is a block diagram of a conventional clutch automatic control vehicle. Diagram explaining shift lever with shift knob switch [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Shift lever, 2 ... Clutch control changeover switch, 3 ... Brake switch, 3A ... Parking brake switch, 4 ... Brake pedal, 4A ... Parking brake, 5 ... Controller, 5-1 ... Knob switch effective flag, 6 ... Clutch pedal Sensor, 7 ... Clutch pedal, 8 ... Master cylinder, 9 ... Accelerator opening sensor, 10 ... Accelerator pedal, 11 ... Engine, 12 ... Engine rotation sensor, 13 ... Clutch, 14 ... Gear position sensor, 15 ... Release fork, 16 ... Transmission, 17 ... Transmission rotation sensor, 18 ... Hydraulic pipe, 19 ... Clutch hydraulic actuator, 20 ... Slave cylinder, 21 ... Rod, 22 ... Clutch position sensor, 23 ... Key switch, 30 ... Shift knob, 31, 32 ... Shift knob switch 33 ... Lever part 34 ... wire

Claims (1)

Shift operation detecting means is provided in the shifting system, the clutch automatically controlled vehicle is automatically controlled disposed friction clutch disconnection, contact is by the controller on the basis of the signal of the shift operation detecting means between the engine and transmission In
The automatic clutch control vehicle according to claim 1, wherein the controller does not receive the signal of the shift operation detecting means when the engine is not started after the key switch is turned on, and when the engine has been started after the key switch is turned on.

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