JP3956162B2 - Gaster change control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gear change control device used for gear change control of a transmission in a transmission that changes the number of revolutions of an engine in a vehicle or the like and transmits it to wheels.
[0002]
[Prior art]
In general, in vehicles such as automobiles, it is necessary to run at a different speed, to go up and down hills, to stop, advance or reverse, but when doing this only with the engine, It becomes necessary to make a huge engine, its weight and cost are significantly increased, and energy utilization efficiency is also lowered.
[0003]
For this reason, the rotation of the engine is transmitted to the wheels via the transmission, and the driving force and speed of the wheels corresponding to the driving operation are obtained via the torque conversion means centering on the gear change.
[0004]
This transmission is composed of, for example, a small gear and a large gear or gears having the same number of teeth arranged between two upper and lower shafts so that they can be meshed via a dog clutch. The clutch is operated so as to temporarily remove the clutch when switching the meshing.
[0005]
FIG. 4 is a block diagram conceptually showing such a conventional gear change mechanism. Referring to FIG. 1, reference numeral 1 denotes a vehicle engine. A clutch shaft 4 is connected to an output shaft 2 of the engine via a clutch 3 called an interrupter.
[0006]
A rotation transmission gear 5 is attached to the clutch shaft 4, and a first-speed gear 6 and a second-speed gear 7 are arranged at positions facing the rotation transmission gear 5. Here, the first speed gear 6 is set to have a larger outer diameter than the second speed gear 7, and a predetermined rotation speed ratio can be obtained between them.
[0007]
Although not shown, these first-speed gear 6 and second-speed gear 7 can be transmitted to a drive shaft for driving wheels via a synchromesh or the like. Reference numeral 8 denotes a case in which the rotation transmission gear 5, the first speed gear 6 and the second speed gear 7 are accommodated. A small amount of lubricating oil (not shown) is accommodated in the case 8 at the bottom.
[0008]
In the gear change mechanism having such a configuration, the rotation of the engine 1 is transmitted to the rotation transmission gear 5 via the output shaft 2, the clutch 3 being closed, and the clutch shaft 4.
[0009]
Considering the case where the vehicle is traveling at the first speed, the rotation transmission gear 5 meshes with the first speed gear 6 as shown in FIG. , 6 and converted to a low speed and transmitted to the wheel drive shaft.
[0010]
Here, when the vehicle is to be shifted to the second speed and driven, the driver depresses the clutch pedal to open the clutch 3 as shown in FIG. The operation for releasing the meshing with the first-speed gear 6 is performed.
[0011]
For this reason, the rotation transmission gear 5 is not meshed with either the first speed gear 6 or the second speed gear 7, and the rotation transmission gear 5 is meshed with the second speed gear 7 by the subsequent operation of the driver.
[0012]
After such engagement of the rotation transmission gear 5 with the second-speed gear 7 is reliably performed as shown in FIG. 4C, the driver performs an operation of gradually engaging the clutch 3. The rotation of the engine 1 can be transmitted to the second-speed gear 7 through the clutch 3 and the rotation transmission gear 5 so that the vehicle can travel slowly and smoothly at the second speed.
[0013]
[Problems to be solved by the invention]
However, in such a conventional change gear mechanism, the driver must perform a clutch operation before and after this operation for every change operation, and the two operations are sequentially performed at a constant timing. In addition to being troublesome, there was a problem that during this operation, it was not possible to concentrate on the steering wheel operation and sometimes it was impossible to respond to an emergency situation.
[0014]
In particular, it is desired to concentrate on driving in a racing vehicle, and there is a problem that such a clutch operation is extremely troublesome for the racer.
[0015]
The present invention has been made in order to solve the above-described conventional problems, and it is possible to easily realize a gear change without a clutch operation, whereby the driver can always concentrate on driving. The purpose is to provide.
[0016]
Another object of the present invention is to provide a gear change control device that can prevent the gear change operation from becoming unstable due to the chattering operation of the gear change switch by the gear change operation.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, a gear change control device according to the first aspect of the present invention provides a gear change switch that is opened and closed in response to a gear change operation of a transmission in a vehicle or the like, and a switch output of the gear change switch. Based on the ignition control means for controlling the engine ignition circuit to a misfire state during the gaster change, and for a certain period of time after the operation of the gai change switch, the gamma change switch canceling circuit outputs the switch output of the gai change switch. Is canceled and the misfire state is forcibly held.
[0018]
According to a second aspect of the present invention, there is provided a gear change control device according to a discharge time constant determined by a capacitor that is rapidly charged during operation of the gear change switch and a discharge resistor connected in parallel to the capacitor. It is something that is set.
According to a third aspect of the present invention, there is provided a gear change control device in which a semiconductor switch that is turned on for a predetermined time and shunts the output of the change switch is connected in parallel to the change switch. .
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram specifically showing a gaster change control device according to the present invention, in which D is a rectifying diode connected to an AC power source, and C is a smoothing capacitor. Reference numeral 11 denotes a change gear detection means, which comprises a change gear switch 12 and one end thereof is grounded.
[0020]
Reference numeral 13 denotes a waveform shaping circuit for differentiating the change signal detected from the change change detecting means 11 via the resistor 12a and clipping the differentiated waveform to a predetermined level, which is connected to the power source (+ 12V) by resistors 14a and 14b. A two-input short-circuit type NAND gate 15 connected via a capacitor, a capacitor 16 and a resistor 17 constituting a differentiation circuit, a series resistor 18, and another NAND gate 19 connected to the series resistor 18. Yes. Note that 14C is a noise absorbing capacitor connected between the input terminal of the NAND gate 15 and the ground, and Q is a power supply terminal for IC.
[0021]
Reference numeral 20 denotes a gaster change output cancel circuit. A resistor 21, a field effect transistor 22, a diode 23, a capacitor 24, and a discharge resistor 25 are connected in parallel between the positive and negative terminals of the DC power source of the gaster change output cancel circuit. Constant circuit) are connected in series.
[0022]
A resistor 26 for introducing an output voltage of a one-shot multivibrator described later is connected to the gate of the field effect transistor 22.
[0023]
Further, in the gaster change output cancel circuit 20, a field effect transistor 27 as a semiconductor switch is connected between the connection point of the gaster switch 12 and the resistor 12a and the ground, and the gate of the field effect transistor 27 and the diode A resistor 28 is connected to the cathode of 23.
[0024]
Further, reference numeral 30 denotes the one-shot multivibrator for shaping the output signal of the waveform shaping circuit into a rectangular wave pulse having a certain time width, which comprises two NAND gates 31 and 32, a variable resistor 33 and a capacitor forming a time constant circuit. 34.
[0025]
35 is an ignition control circuit that receives a rectangular wave pulse from the one-shot multivibrator 30 and outputs an ignition control signal to the engine ignition circuit 37 via a field effect transistor 39, which is connected at one end to the output terminal of the NAND gate 31. The resistor 38 is connected, the field effect transistor 39 having a gate connected to the other end of the resistor 38, and the capacitor 40 connected between the other end of the resistor 38 and the ground.
[0026]
Reference numeral 41 denotes a display circuit which receives a rectangular wave pulse output from the one-shot multivibrator 30 and displays that the ignition circuit 37 is in a misfire state. This is connected to the output terminal of the NAND gate 31 via a resistor 42. A transistor 43 connected to the base, a series circuit of a light emitting diode 44 and a resistor 46 connected between the collector of the transistor 43 and the positive power supply line, and connected between the emitter of the transistor 43 and the positive power supply line The power supply lamp circuit 42 includes a light emitting diode 45 and a resistor 47.
[0027]
The waveform shaping circuit 13, the gear change output cancel circuit 20, the one-shot multivibrator 30, the ignition control circuit 35, and the display circuit 41 constitute an ignition control means P.
[0028]
Next, the operation will be described in relation to the operation of the gaster change mechanism of FIG. Now, the state in which the rotation of the engine 1 is transmitted to the rotation transmission gear 5 via the output shaft 2, the clutch 3 being closed, and the clutch shaft 4 is referred to as a state before the gear change.
[0029]
In this state, the vehicle is traveling at the first speed, and the rotation transmission gear 5 is engaged with the first speed gear 6 as shown in FIG. Is converted to a low speed and transmitted to the drive shaft of the wheel.
[0030]
Therefore, when the vehicle is to be shifted to the second speed and traveled, the gear change operation is directly performed so that the transmission is put into the second speed as it is. That is, only the gear change is performed without operating the clutch 3 at all.
[0031]
For this reason, the rotation transmission gear 5 is separated from the first-speed gear 6, the meshing with the first-speed gear 6 is released, and as shown in FIG. At this time, the clutch is closed and not opened.
[0032]
On the other hand, the gear change switch 12 in the circuit shown in FIG. 1 is turned on as shown in FIG. 3 (a) by the change gear operation from the first speed to the second speed. The potential on the input side of the NAND gate 15 is lowered to the ground potential as shown in FIG. 3B, and the output potential of the NAND gate 15 is inverted again as shown in FIG.
[0033]
This output potential is input to a differentiation circuit composed of a capacitor 16 and a resistor 17 and converted into a differential waveform as shown in FIG. 3 (d). Further, the rising waveform of this differential waveform is converted to an appropriate threshold level. To output a shaped wave pulse signal as shown in FIG.
[0034]
Further, the shaped wave pulse signal is input to the one-shot multivibrator 30 and is affected by the time constant formed by the variable resistor 33 and the capacitor 34, and is relatively connected to the output side of the NAND gate 31 as shown in FIG. A rectangular wave signal with a large time width is output. Note that a rectangular wave signal as shown in FIG. 3G is output to the output side of the NAND gate 32, and the potential at the connection point of the variable resistor 33 and the capacitor 34 is the integrated waveform as shown in FIG. Become.
[0035]
The output signal of the one-shot multivibrator 30 is input to the ignition control circuit 35. When the output signal reaches a predetermined level for turning on the field effect transistor 39, the control input to the ignition circuit 37 is passed through the field effect transistor 39. The potential drops to the ground level as shown in FIG. 3 (i), and the ignition circuit 37 enters a misfire state.
[0036]
That is, by changing the transmission of the vehicle to the second speed, the rotation transmission gear 5 is immediately separated from the first speed gear 6 as described above, and then the engine 1 falls into a misfire state and rotates. The rotation of the transmission gear 5 is also suppressed from rising due to the misfire.
[0037]
For this reason, the rotation transmission gear 5 can be smoothly meshed with the second-speed gear 7 as shown in FIG. 2 (c) by the operation of the gear change without the conventional clutch operation. That is, the vehicle can be driven at the second speed by changing the transmission to the second speed.
[0038]
Thus, when changing gears of a transmission such as a vehicle, it is possible to smoothly change gears from the first speed to the second speed without operating the clutch, thereby simplifying the speed change operation of the vehicle. be able to.
[0039]
In the above-described embodiment, the gear change from the first speed to the second speed has been described. However, the gear change (not shown) between the two or more speed stages can be performed in the same manner as the above-described embodiment by the misfire control. It goes without saying that.
[0040]
By the way, such a gaster change control device may be accompanied by chattering operation of the gaster switch 12 by the gai change operation. In other words, the gear change switch 12 may be subject to chattering phenomenon in which the gear change switch 12 is repeatedly turned on and off due to the vibration of the engine due to contact wear and the like.
[0041]
Therefore, according to the chattering phenomenon, even if the ignition circuit 37 is caused to misfire by the change gear operation, the ignition is continued again, and the meshing of the rotation transmission gear 5 with the second speed gear 7 is smoothly performed. It may be impossible to do so.
[0042]
However, in the present invention, once the change switch 12 is turned on for shifting, the output of the one-shot multivibrator 30, that is, the rectangular wave output having a large time width from the NAND gate 31, And is applied to the gate of the field effect transistor 22 via.
[0043]
As a result, the field effect transistor 22 is turned on, and the capacitor 24 is immediately charged from the power source through the resistor 21 and the backflow preventing diode 23.
[0044]
At the same time, a gate voltage is applied to the gate of the field effect transistor 27 via the diode 23 and the resistor 28, and the field effect transistor 27 is immediately turned on. Therefore, regardless of whether the change switch 12 is on or off, one end of the resistor 12a on the side of the change switch 12 is grounded. As a result, the switch output of the change switch 12 is canceled and the NAND gate The input potential of 15 is forcibly set to a low level.
[0045]
As a result, the output of the NAND gate 31 of the one-shot multivibrator 30 outputs a rectangular wave signal having a large time width in the same manner as when the gear change switch 12 is turned on.
[0046]
In other words, even if the switch switch chattering causes the switch to be turned off again after the switch operation of the gear change switch 12, the capacitor is turned on when the switch switch 12 is turned on. Since the electric charge charged in 24 is discharged to the discharge resistor 25 with a constant time constant and maintains a predetermined level of potential, the field effect transistor 27 continues to be in an ON state, and the input potential of the NAND gate 15 is lowered. And the misfire state is continuously maintained.
[0047]
When the potential obtained at both ends of the discharge resistor 25 drops below a predetermined level due to the discharge of the capacitor 24, the field effect transistor 27 is turned off to stop the misfire state and within the time constant time. Then, the meshing (gear change) of the rotation transmission gear 5 with the second speed gear 7 is completed, and the acceleration by the ignition of the engine can be realized again.
[0048]
That is, in the present invention, the misfire control is prevented from becoming unstable due to chattering generated when the gear change switch 12 is operated, and the rotation transmission gear 5 can be smoothly meshed with each gear such as for the second speed. Yes.
[0049]
【The invention's effect】
As described above, according to the first aspect of the present invention, the gear change switch that opens and closes in response to the gear change operation of the transmission in a vehicle and the like, and the switch output of the gear change switch A set time is an ignition control means for controlling the ignition circuit of the engine to a misfire state, and a fixed time after the operation of the gaichang switch is to cause the gaichange output cancel circuit to cancel the switch output of the gaichang switch, and the misfire state. Because it is configured to forcibly hold the gear, it is possible to easily realize the gear change without the clutch operation, so that the driver can always concentrate on safe driving and planned driving, as well as chattering of the gear change switch that occurs at the time of the gear change. Regardless of the misfire control of the ignition circuit, smooth changeover There is an effect that it can now be obtained.
[0050]
According to a second aspect of the present invention, the fixed time is set by a discharge time constant determined by a capacitor that is rapidly charged during operation of the change gear switch and a discharge resistor connected in parallel to the capacitor. As a result, the necessary misfire time is ensured regardless of the occurrence of chattering, and the meshing of the rotation transmission gear with the gear on the speed change side can be performed and completed smoothly during this time. .
[0051]
Further, according to the invention of claim 3, since the semiconductor switch for turning on the shunt of the output of the change switch is connected in parallel to the change switch, the change switch is connected in parallel. The shunt control can be performed at high speed and with high sensitivity, and stabilization of the control operation can be expected.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing a gear change control device according to an embodiment of the present invention.
FIG. 2 is a conceptual diagram showing a gear change mechanism for explaining a gear change procedure according to the present invention.
FIG. 3 is a timing chart showing signal waveforms at various parts of the circuit of FIG. 1;
FIG. 4 is a conceptual diagram showing a gear change mechanism for explaining a conventional gear change procedure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 11 Gac change detection means 12 Gac change switch 20 Gac change output cancellation circuit 24 Capacitor 25 Discharge resistance P Ignition control means

Claims (3)

A gear change switch that opens and closes in response to a gear change operation of a transmission in a vehicle and the like, and an ignition that controls the ignition circuit of the engine to a misfire state based on the switch output of the gear change switch based on the switch output of the gear change switch A gear change control device comprising: control means; and a gear change output cancel circuit for canceling the switch output of the gear change switch and forcibly holding the misfire state for a predetermined time after the operation of the gear change switch. The said fixed time is set by the discharge time constant determined by the capacitor | condenser rapidly charged at the time of the operation | movement of the said change switch, and the discharge resistance connected in parallel with this capacitor | condenser. Gaster change control device. The gaster switch according to claim 1, wherein a semiconductor switch that is turned on during the predetermined time and shunts the output of the gaichang switch is connected in parallel to the gaichang switch.

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