JP3500956B2 - Control circuit for automatic transmission with manual shift function - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control circuit capable of issuing a manual shift instruction from a steering wheel in an automatic transmission with a manual shift function.

[0002]

2. Description of the Related Art A conventional automatic transmission with a manual shift function includes a selector device 1 as shown in FIG.

The selector device 1 includes a parking range "P", a reverse range "R", a neutral range "N", a drive range "D", a third range "3" and a second range "2" in that order in the front and rear of the vehicle. The automatic transmission path 4 which is arranged in one row in the direction to stabilize the select lever 2
And a manual transmission line 6 having an upshift range "+" and a downshift range "-" arranged in parallel with the automatic transmission line 4 centering on a position corresponding to the drive range "D", and A communication passage 8 that connects the automatic transmission path 4 and the manual transmission path 6 at a position corresponding to the drive range "D", and a select lever 2
A manual mode switch 10 configured by, for example, a seesaw switch that detects whether or not the shift lever has moved to the manual transmission path 6 side, and an upshift switch that detects whether or not the select lever 2 selects the upshift range "+". 12 and a downshift switch 14 for detecting whether or not the select lever 2 has selected the downshift range "-".

On the other hand, as shown in FIG. 5, the steering wheel 16 is provided with a steering switch 18 for selecting an upshift or a downshift for the spokes 17. The steering switch 18 is composed of a pair of left and right momentary switches 18L and 18R which are arranged at positions near the left and right sides of the spoke 17, respectively, and these switches 18L and 18R move up in the upshift range when the movable part is moved upward. When "+" is selected and the movable part is moved downward, the downshift range "-" is selected.

The manual mode switch 10,
Upshift switch 12, downshift switch 14
The steering switches 18L and 18R form a control circuit shown in FIG.
2 input terminals 22a, 22b, 22c and 22d-2
2f, and a connection line between these input terminals 22a to 22f and each of the switches 10, 12, 14, 18L and 18R is connected to a positive power supply terminal + V _C via a resistor R.

Then, each switch 10, 12, 14, 1
When the 8L and 18R are not operated and are in the off state, the left and right steering switches 18L and 18R
Since the movable contact t _C of the control unit 22 is switched to the neutral contact t _N which is a normally closed contact, only the sixth input terminal 22f of the control unit 22 becomes low level, and the remaining input terminals 22a to 22e become high level. Therefore, it is determined that the automatic mode is selected, and the automatic transmission is subjected to the normal shift control for setting the shift speed based on, for example, the throttle opening and the vehicle speed.

Further, the select lever 2 has an automatic transmission path 4
When the drive range “D” is moved to the upshift range “+” of the manual transmission path 6, the make contacts 10a and 12a of the manual mode switch 10 and the upshift switch 12 are closed, and the first and second input terminals 22a are closed.
Since 22 and 22b become low level, the control unit 22 performs control to shift up the shift stage of the automatic transmission to the high speed side by one speed based on these low level signals.

Further, when the select lever 2 moves from the drive range "D" of the automatic transmission 4 to the downshift range "-" of the manual transmission 6, the make contacts 10a and 14a of the manual mode switch 10 and the downshift switch 14 are moved. Closed, the first and third input terminals 2
Since 2a and 22c are at a low level, the control unit 22 controls to shift down the shift stage of the automatic transmission to the low speed side by one speed based on these low level signals.

Furthermore, when the movable portion of the left steering switch 18L of the left and right steering switches 18L and 18R arranged on the steering wheel 16 is moved to the upshift range "+" side, the movable contact t _C is upshifted. Since the fourth input terminal 22d is switched to the low level by switching to the side contact t _U , the control unit 22 shifts the gear position of the automatic transmission to the first speed according to the low level signal of the fourth input terminal 22d. Only the control to shift up to the high speed side is performed.

Furthermore, when the movable part of the left steering switch 18L is moved to the downshift range "-", the movable contact t _C is switched to the downshift side contact t _D , and the fifth input terminal 22e goes low. Since the level is reached, the control unit 22 performs control to shift down the shift stage of the automatic transmission to the low speed side by one speed based on this low level signal.

[0011]

However, in the conventional control circuit shown in FIG. 5, the steering wheel 16 is provided with the left and right steering wheel switches 18L and 18R. When the operator does not intend to change the shift, and when the steering wheel 16 is being steered or cracked and the movable portion of one of the steering switches 18L and 18R is erroneously touched, a gear shift operation not intended by the driver is performed. There is an unsolved problem that there is a possibility of being broken.

Therefore, the present invention has been made by paying attention to the unsolved problem of the above conventional example, and makes the steering switch operation effective only when the driver intends to operate the steering switch. , When the steering switch is enabled, it automatically returns to the disabled state at a predetermined timing, and the steering switch is enabled / disabled.
It is an object of the present invention to provide a control circuit for an automatic transmission with a manual shift function that makes the invalid state visible.

[0013]

In order to achieve the above object, a control circuit of an automatic transmission with a manual shift function according to claim 1 of the present invention operates in either an automatic drive mode or a manual drive mode by operating a select lever. A selection device for selecting either one, a steering switch disposed on the steering wheel for individually detecting that upshift and downshift are selected, and a predetermined automatic transmission based on a switch signal of the steering switch. In a control circuit of an automatic transmission with a manual shift function, which includes a control unit that controls the setting of a shift speed, the steering switch is connected in series and the steering switch is enabled / disabled by the driver.
Disabled is selected and the ignition switch is turned off
The self-holding switch circuit that automatically returns to the off state when it is operated is connected to the select device so that the self-holding switch circuit is activated when the select lever selects the manual drive mode. It is characterized by having a relay circuit.

In the invention according to claim 1, since the self-holding switch circuit is connected in series with the steering switch, the operation of the steering switch is disabled by keeping the self-holding switch circuit in the OFF state. When the driver wants to change the shift with the steering switch, the steering switch operation is enabled for the first time by turning on the self-holding switch circuit, and the self-holding switch circuit is turned off. As a result, it is possible to reliably prevent the shift operation of the automatic transmission due to the erroneous operation of the steering switch. Moreover, the relay circuit that constitutes the self-holding switch circuit is connected to the select device so that it is activated when the select lever selects the manual drive mode, so the select lever selects the auto drive mode. When the steering wheel is on, the steering switch is definitely in the invalid state. In addition,
Since it uses a self-maintaining switch circuit, this self-protection
Even if the portable switch circuit is turned on, the ignition
When the switch is turned off, it automatically turns off.
When returning and turning on the ignition switch
Surely prevent the operation valid state from being maintained.
You can

Further, since it is a self-holding type switch circuit, this on-state is held by itself when it is turned on, but when the vehicle is stopped and the key switch is turned off, the self-holding type switch circuit is held. Since power supply to the circuit is also stopped, it automatically returns to the off state.

The control circuit of the automatic transmission with a manual shift function according to a second aspect of the present invention is provided in the steering wheel and a selection device that selects either the automatic traveling mode or the manual traveling mode by operating the select lever. Manual shift provided with a steering switch for individually detecting that upshift and downshift have been selected, and a control unit for performing setting control of a predetermined shift stage in the automatic transmission based on a switch signal of the steering switch. In a control circuit of an automatic transmission with a function, the steering switch is connected in series to enable / disable the steering switch by the driver's intention, and the ignition switch is turned on.
The self-holding switch circuit is provided with a self-holding switch circuit that automatically returns to the off state when the self-holding switch The circuit is characterized in that it has a relay circuit connected to the selector so that it is activated when the selector lever selects the manual drive mode.

In addition to the operation of claim 1, the invention according to claim 2 is provided with operating state monitoring means, whereby the abnormal state of the self-holding type switch circuit and the valid / invalid state of the steering switch are provided. Can be monitored.

Further, in the control circuit of the automatic transmission with a manual shift function according to a third aspect of the present invention, in the invention of the second aspect, the operating state monitoring means determines whether or not the self-holding switch circuit is in the operating state. A self-holding type switch circuit operation monitoring unit, a steering switch operation monitoring unit that monitors whether or not the switch operation of the steering switch is enabled, and a self-holding type switch circuit operation monitoring unit. And a display device that is operated when the switch circuit is in an operating state or when the steering switch operation monitoring unit detects that the steering switch is in an operating state. .

According to the third aspect of the present invention, when the self-holding switch circuit is turned on, the indicator is turned on or the display operation such as a blinking operation is performed and the operation of the steering switch is validated. In addition to this, when a short-circuit abnormality occurs in the self-holding type switch circuit, the display is activated to indicate that the steering switch operation is valid. The display is operated even when a short circuit to the ground occurs on the switch side and the operation becomes valid without the intervention of the self-holding switch circuit.

Furthermore, a control circuit for an automatic transmission with a manual shift function according to a fourth aspect is the invention according to the third aspect, wherein the self-holding switch circuit operation monitoring section is an energization of the self-holding switch circuit. It is characterized in that it has a switching element for detecting a state, and is configured to operate the display when the switching element is turned on.

In the invention according to claim 4, by turning on the switching element when the self-holding switch circuit is in the energized state, it is possible to control the display connected to the switching element to, for example, the lighting state. This enables the driver to visually confirm that the operation of the steering switch is effective.

Still further, the control circuit of the automatic transmission with a manual shift function according to a fifth aspect of the present invention is the control circuit of the third or fourth aspect.
In the invention according to claim 3, the steering switch operation monitoring unit has a switching element that detects an energizable state of the steering switch, and is configured to display-operate the display when the switching element is turned on. It is characterized by being.

According to the fifth aspect of the present invention, as in the case where a short-circuit to the ground occurs between the steering switch and the self-holding switch circuit on the downstream side, it is determined whether the self-holding switch circuit is energized. Regardless, when the operation of the steering switch becomes effective, the display is operated such as lighting, so that the driver can visually recognize it.

According to a sixth aspect of the present invention, there is provided a control circuit for an automatic transmission with a manual shift function according to the fourth or fifth aspect, wherein one end of the switching element is connected to the display and the other end is inside the selector device. It is characterized in that it is grounded via a manual mode side contact of a switch section for detecting the manual running mode provided in the.

According to the sixth aspect of the invention, when the manual drive mode is detected by the select switch, the energizing path of the display is formed through the switch portion, but when the automatic drive mode is selected, When the switch section is turned off, the power supply path of the display is cut off and the display operation of the display is stopped.

Further, in a control circuit for an automatic transmission with a manual shift function according to a seventh aspect of the present invention, in the invention according to the first to sixth aspects, the self-holding type switch circuit is arranged in a selecting device, and the manual transmission is provided. It is characterized in that it is grounded via a select switch that individually detects that upshift and downshift are selected in the traveling mode.

In the invention according to claim 7, the operation of the steering switch is invalidated when the select switch is in an operating state only due to the electrical connection, and the steering switch is operated when the select switch is in a non-operating state. Can be effective and the interlock function can be exerted.

Furthermore, a control circuit for an automatic transmission with a manual shift function according to an eighth aspect of the present invention is provided.
In any one of the inventions, the self-holding switch circuit has a relay contact and a self-holding contact that are turned on when the relay coil is energized, and the relay contact is inserted between the select switch and the steering switch. It is characterized by comprising a relay circuit and a momentary switch inserted between a self-holding contact of the relay circuit and a relay coil.

In the invention according to claim 8, when the power is turned on with the key switch turned on, the relay coil is in the non-energized state and the relay contact and the self-holding contact are in the off state unless the momentary switch is operated. , The steering switch to which the relay contact is connected is disabled.

When the momentary switch is turned on from this state, the relay coil is energized, the relay contact and the self-holding contact are turned on, and the steering switch is activated.

In the effective state of this steering switch,
When the key switch is turned off, the power supplied to the relay coil via the self-holding contact is cut off, the self-holding state is released, and the steering switch returns to the invalid state.

[0032]

According to the invention of claim 1 of the present invention,
Since the self-holding switch circuit is connected in series with the steering switch, the driver can operate this self-holding switch circuit to select whether the steering switch operation is valid or invalid. It is possible to positively prevent the shift operation of the automatic transmission due to an erroneous operation of the steering switch at the time of cracking or cracking, and to release the self-holding by stopping the power supply by turning off the ignition switch of the vehicle and the steering switch. By returning to the invalid state of the operation, it is possible to prevent the steering switch operation from being inadvertently activated. Moreover, the relay circuit that constitutes the self-holding switch circuit is connected to the select device so that it is activated when the select lever selects the manual drive mode, so the select lever selects the auto drive mode. The steering switch can be reliably brought into the inoperative state when the steering wheel is in the off state.

According to the second aspect of the invention, in addition to the effect of the first aspect, since the operating state monitoring means is provided, the abnormal state of the self-holding type switch circuit and the effectiveness of the steering switch are thereby provided. / The effect that the invalid state can be monitored is obtained.

Further, according to the third aspect of the invention, when the self-holding type switch circuit is turned on, the display is operated such that the display is turned on or blinking and the operation of the steering switch becomes effective. In addition to this, the display is operated even when the steering switch is activated due to a short circuit abnormality in the self-holding type switch circuit or steering switch. In addition to being surely visible, when the driver is not operating the self-holding switch circuit, this self-holding switch circuit and / or
Alternatively, it is possible to obtain an effect that it is possible to recognize that an abnormal state such as a short circuit abnormality has occurred in the steering switch.

Further, according to the invention of claim 4, by turning on the switching element when the self-holding switch circuit is in the energized state, the display connected to the switching element is controlled, for example, in the lighting state. You can
The effect that the driver can surely visually recognize that the operation of the steering switch is effective is obtained with a simple configuration.

Still further, according to the invention of claim 5, the self-holding switch circuit of the self-holding switch circuit is provided as when a short-circuit abnormality to the ground occurs between the steering switch and the self-holding switch circuit on the downstream side. Regardless of the energized state, when the steering switch operation is enabled, the display is turned on, so that the driver can be sure that the steering switch operation is enabled. The effect is obtained.

According to the sixth aspect of the invention, when the manual drive mode is detected by the select switch, the energization path of the display is formed through the switch portion, but the automatic drive mode is selected. In some cases, the switch section is turned off to cut off the power supply path of the display unit and stop the display operation of the display unit. Therefore, the display operation of the display unit accurately corresponds to whether the steering switch operation is valid or invalid. The effect of being able to do is obtained.

Further, according to the invention of claim 7, since the select switch is connected in series to the steering switch through the self-holding type switch circuit, the select switch is not connected only by electrical connection. The operation of the steering switch can be made effective in the operation state, and the effect that the interlock function can be exerted is obtained.

Further, according to the invention of claim 8, when the momentary switch is not operated when the power is turned on, the self-holding type switch circuit is not turned on and the operation of the steering switch is maintained in an invalid state. When the momentary switch is turned on, the relay coil is energized, the relay contact and the self-holding contact are turned on, the steering switch is enabled, and then the key switch is turned off. Is released and the steering switch is returned to the ineffective state, so that the steering switch operation is always returned to the ineffective state when the power is turned on, and an erroneous operation of the steering switch can be reliably prevented.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a first embodiment of the present invention. In the figure, 30 is a select switch disposed in the select device 1 of FIG. 3 described above, and a shift lever is on the automatic transmission path 4. Or the manual transmission path 6 to detect whether the vehicle is in the automatic traveling mode or the manual traveling mode, the manual mode switch M including a two-contact type seesaw switch.
S, whether the shift lever is operated to the upshift range "+" and the upshift switch US and the shift lever which are configured by a two-contact type momentary switch to detect whether the shift lever is operated to the downshift range "-" Similarly, the downshift switch DS is composed of a two-contact type momentary switch.

Here, the movable contact t _C of the manual mode switch MS is grounded, and the automatic running mode side contact t _A
Is connected to the first input terminal 32a of the control unit 32 via the signal line SL1, and the manual mode side contact t _M is connected to the movable contact t _C of the upshift switch US.

The normally open contact t _NO of this upshift switch US is connected to the control unit 32 via the signal line SL2.
Of the normally closed contact t _NC of the downshift switch DS is connected to the movable contact t _C of the downshift switch DS.

The normally open contact t _NO of the downshift switch DS is connected to the control unit 32 via the signal line SL3.
The fourth is the connected to the input terminal 32d, and is connected to the second input terminal 32b of the control unit 32 normally closed contact t _NC via a signal line SL4 of.

On the other hand, as shown in FIG. 1, the steering wheel switch 18 disposed on the steering wheel has a pair of left and right switches 18L and 18L, which is a three-contact type momentary switch as in the conventional example.
Left and right switches 18L and 18R
The upshift side contacts t _U of the
It is connected to the third input terminal 32c of the control unit 32 via L11, the downshift side contacts t _D are connected to each other, and are connected to the fourth input terminal 32d of the control unit 32 via the signal line SL12. .

Signal lines SL1, SL4 and SL11
To SL13, the DC power supply V _IG supplied via the ignition switch (not shown) via the pull-up resistor R on the control unit 32 side is input.

Also, the normally closed contact of the left switch 18L is used.
Neutral contact t_NIs the movable contact t of the right switch 18R_CTo
Neutral connection that is connected and serves as a normally closed contact for the right switch 18R
Point t _NControl unit via signal line SL13
The left side switch connected to the fifth input terminal 32e of 32
18L movable contact t_CThe self-holding switch circuit 34
Grounded through.

This self-holding type switch circuit 34 has a momentary type main switch 36, which is operated by the driver's will, to which the DC power source V _IG supplied through an ignition switch (not shown) is input. , And a self-holding type relay circuit 38.

When the main switch 36 is in the off position, the first input terminal t _i1 to which the DC power source V _IG is input and the output terminal t _o are cut off, and the main switch 36 is in the _normally closed neutral position. The second input terminal t _i2 to which the power from the relay circuit 38 is sometimes input and the output terminal t _o are connected,
The first and second input terminals t _i1 and t _i2 and the output terminal t _o are connected to each other when in the ON position.

The relay circuit 38 has a normally open contact s1 and a self-holding contact s2, and a relay coil RL for driving them. One end of the normally open contact s1 is the movable contact t _C of the left switch 18L of the steering switch 18. And the other end of the self-holding contact s2
_Has one end connected to the DC power supply V _IG and the other end connected to the main switch 3
Are respectively connected to the second input terminal t _i2 of 6, the relay coil RL is with one end connected to the output terminal t _o the main switch 36, the other end is grounded.

Further, an operating state monitoring circuit 40 is provided as an operating state monitoring means for monitoring the operating states of the steering switch 18 and the self-holding switch circuit 34. In the operating state monitoring circuit 40, the base is connected to the input terminal t _i2 of the main switch 36 via the resistors R1 and R2, and the collector is provided via a lamp 42 as a display disposed on the front side of the driver's seat. Connected to DC power supply V _IG ,
An NPN type switching transistor Q1 which constitutes a self-holding type switch circuit monitoring unit whose emitter is grounded,
The base is connected to the connection line to the steering switch 18 and the relay circuit 38 via the resistor R3, the emitter is connected to the DC power supply V _IG via the resistor R4, and the collector is connected to the base of the switching transistor Q1 via the resistor R5. And a PNP type switching transistor Q2 which constitutes a steering switch monitoring section.

R6 is a switching transistor Q
Bias resistor connected between two bases and emitters, C
Reference numeral 1 is a capacitor that forms a low-pass filter for noise removal with the resistor R2, and C2 is a capacitor that also forms a low-pass filter for noise removal with the resistor R4.

Next, the operation of the first embodiment will be described. Now, with the selection device 1 shown in FIG.
It is assumed that the vehicle is stopped in the parking range “P”, the key switch is off in this state, and the DC power supply V _IG is not supplied.

In this state, as shown in FIG. 1, in the select switch 30, the manual mode switch MS is switched to the auto mode side terminal t _A , and both the upshift switch US and the downshift switch DS are normally closed contacts t.
_Since the steering switch 18 is not operated, the left and right switches 18L and 18R are switched to the neutral contacts t _N.

In this state, the control unit 32
Is not turned on, is in a non-operating state, the DC power supply V _IG is not input to the main switch 36, and is in a neutral position in a non-operating state.
The relay coil RL is in a non-energized state, and the contacts s1 and s2 are open.

When the key switch is operated from this state to turn on the ignition switch (not shown) and the engine is started, the main switch 35 is responded accordingly.
The DC power supply V _IG is supplied to the first input terminal t _{i1, the} relay circuit 38, and the operation state monitoring circuit 40, and the control unit 32 is also turned on to be in the operation state.

In this state, the manual switch MS is switched to the terminal t _A on the automatic running mode side.
Since only the first input terminal 32a of the controller unit 32 becomes low level by setting only the signal line SL1 to the ground level, the control unit 32 recognizes that it is in the automatic traveling mode and, for example, the throttle opening degree. Also, the automatic transmission is controlled by selecting a shift speed according to the vehicle speed.

However, in this state, since the main switch 36 is in the neutral position, the connection between the first input terminal t _i1 and the output terminal t _o is cut off, and the relay coil 36 of the relay circuit 38 is in the non-energized state. Since the steering switch 18 is maintained, the movable contact t _C of the left switch 18L of the steering switch 18 is disconnected from the ground, and its operation is disabled.

At this time, in the operation state monitoring circuit 40, assuming that the main switch 36 and the relay circuit 38 are normal, the potential of the second input terminal t _i2 of the main switch 36 is at a low level, so that the switching transistor Q1 maintains the off state and the lamp 42 maintains the extinguished state, whereby the driver can visually recognize the steering switch 18 operation disabled state.

From this stopped state, the vehicle is brought into a running state by selecting, for example, the drive range "D" with the select lever 2 of the select device 1 and depressing the accelerator pedal. If the manual switch MS is moved to the manual transmission path 6 side via the
Switched to _M side.

Therefore, the signal line SL1 returns to the high level at the first input terminal 32a of the controller unit 32, and the signal line SL4 is grounded, so that the second input terminal 32b goes to the low level. The controller 32 recognizes that the mode has been changed to the manual drive mode.

Therefore, in this state, by selecting the upshift range "+" (or the downshift range "-") with the select lever 2, the signal line SL2 (or SL3) is grounded, and thus the control unit. 32 third input terminal 32c (or fourth input terminal 3
2d) becomes low level, and it is determined that there is an upshift (or downshift) request, and the shift stage of the automatic transmission is upshifted (or downshifted).

During this time, since the main switch 36 of the steering switch 18 maintains the neutral position, the signal line SL13 is disconnected from the ground, so that the fifth input terminal 32e of the control unit 32 maintains a high level. Therefore, the control unit 32 can recognize the non-operation state of the steering switch 18.

When the main switch 36 is operated to switch to the ON position in this state, DC power is output from the output terminal t _o in response to this, and this DC power is supplied to the relay coil RL of the relay circuit 38. The relay coil RL is excited to close the relay contact s1 and the self-holding contact s2.

At this time, by closing the self-holding contact s2, the DC power of the DC power supply V _IG is transferred to the main switch 36.
The second would be supplied to the input terminal t _i2, at the return to the neutral position becoming the main switch 36 is a non-operation state, an output terminal t _o a second input terminal t _i2 connection state of Is maintained, the energized state of the relay coil RL is maintained.

As a result, the steering switch 18
, The movable contact t _C of the left switch 18L is grounded through the relay contact s1 of the relay circuit 38, the signal line SL13 is grounded, and the fifth input terminal 32e of the control unit 32 becomes low level to control. The unit 32 can recognize that the steering switch 18 is in the operation valid state.

On the other hand, in the operation state monitoring circuit 40, when DC power is applied to the base of the switching transistor Q1, this becomes a high level and is turned on, and the lamp 42 is energized and lit, so that the driver is informed. It informs that the steering switch 18 is in the operation valid state.

At this time, the switching transistor Q2
Also, when its base becomes low level, it is turned on and supplies DC power to the switching transistor Q1.

Therefore, this steering switch 1
8, the movable contact of the left switch 18L (or the right switch 18R) is moved to the upshift range "+", so that the movable contact t _C is switched from the neutral contact t _N to the upshift side contact t _U. Instead, the third input terminal 32c of the control unit 32 becomes low level, so that the control unit 32 can recognize the upshift request as in the case of switching the upshift switch US in the select switch 30 described above. , Thereby upshifting the automatic transmission.

Conversely, by moving the movable part of the left switch 18L (or the right switch 18R) to the downshift range "-", the movable contact t _C is switched from the neutral contact t _N to the downshift side contact t _D , Since the fourth input terminal 32d of the control unit 32 becomes low level, the downshift request can be recognized by the control unit 32 as in the case where the downshift switch DS in the select switch 30 described above is switched. The downshift control of the automatic transmission is performed by.

When the driver wishes to return the steering switch 18 to the operation disabled state while the steering switch 18 is in the operation enabled state with the self-holding type switch circuit 34 turned on, the main switch 3
Move 6 to the off position.

As a result, the connection between the first input terminal t _i1 and the second input terminal t _i2 and the output terminal t _o is cut off, so that the relay coil RL becomes non-conductive, which causes the relay contact s1. The self-holding contact s2 is opened, and the movable contact t _C of the left switch 18L of the steering switch 18 is disconnected from the ground, whereby the steering switch 18 returns to the operation invalid state.

In response to this, the base of the switching transistor Q1 in the operating state monitoring circuit 40 becomes low level, and the base of the switching transistor Q2 becomes high level, both of them are turned off, and the lamp 42 is turned on.
Is turned off, and the driver is informed that the steering switch 18 has returned to the inoperative state.

Further, this self-holding type switch circuit 34
When the vehicle is stopped and the ignition switch is turned off while the steering switch 18 is turned on and the steering switch 18 is in the operation valid state, the main switch 36
Since the DC power supplied to the second input terminal t _i2 of the relay coil RL is stopped, the relay coil RL is de-energized accordingly, and the relay contact s1 and the self-holding contact s2 are opened. At the same time, the steering switch 18 is returned to the operation invalid state, and the lamp 42 is turned off in the operation state monitoring circuit 40.

As described above, even if the ignition switch is turned off while the main switch 36 is once in the on position and the self-holding switch circuit 34 is in the on state, the self-holding switch circuit 34 automatically returns to the off state. Then, when the ignition switch is turned on next time, it is possible to surely prevent the self-holding type switch circuit 34 from continuing to be turned on to keep the steering switch 18 in the operation valid state. It is possible to reliably prevent an erroneous operation of the steering switch that is not intended by the driver.

On the other hand, with the main switch 36,
Cannot be returned to the neutral position from the input terminal t
_i1And output terminal t_oA short circuit occurs between the relay coil R
Is it possible to cut off the energized state of L, or even relay circuit 3
The self-holding contact s2 of No. 8 stays closed
The second input terminal t of the main switch 36 _i2
Or monitoring the operating status of DC power through the self-holding contact s2
Supplied to the switching transistor Q1 of the circuit 40
The high level of the base makes this transistor
Q1 continues to be on and lamp 42 remains lit
To be done.

Therefore, the driver is
Lamp 4 should go out when is operated to the off position
Since No. 2 is maintained in the lighting state, it is possible to inform the driver that the self-holding switch circuit 34 is abnormal.

Further , in the above-mentioned abnormal state, when the driver turns off the ignition switch without operating the main switch 36 to the off position, when the ignition switch is turned on next time , the DC power source V _IG a switching transistor Q1 operating state monitoring circuit 40 to the supply start of by turned on, the lamp 42 is turned on in, to inform the operation enabled state of the steering switch 18 to the driver.

Therefore, the driver normally recognizes that an abnormality has occurred in the main switch 36 or the self-holding contact s2 of the relay circuit 38 because the lamp 42 must be off when the ignition switch is turned on. can do.

Further, when a short circuit to the ground occurs in the signal line SL14 between the steering switch 18 or the steering switch 18 and the self-holding switch circuit 34 instead of the self-holding switch circuit 34 side, the self-holding operation is performed. The steering switch 18 is in the operation valid state regardless of the ON / OFF state of the die switch circuit 34.
At this time, since the signal line SL14 is grounded, the switching transistor Q2 in the operating state monitoring circuit 40 is turned on, so that the switching transistor Q1 is turned on and the lamp 42 is turned on, and the steering switch 18 is turned on. The operation valid state of is displayed.

Therefore, also in this case, it is ensured that the steering switch 18 is in the operation valid state due to the occurrence of an abnormal state by turning the main switch 36 to the off position or turning on the lamp 42 when the ignition switch is turned on. Can be recognized.

As described above, in the first embodiment, the main switch 36 is turned on / off according to the intention of the driver.
By turning it off, the self-holding switch circuit 34 can be turned on / off to switch the operation of the steering switch 18 to the valid state or the invalid state, and it is possible to reliably prevent erroneous operation of the steering switch 18.

Further, the operating state monitoring circuit 40 monitors whether the operation of the steering switch 18 is valid or invalid, and the lamp 42 is used to display the valid / invalid state. The state of the steering switch can be reliably recognized.

In addition, when the operation of the steering switch 18 becomes effective due to the occurrence of an abnormality in the self-holding switch circuit 34 or a short circuit to the ground of the signal line SL14 in the operating state monitoring circuit 40, the lamp is turned on. By turning on 42, it is possible to reliably notify the effective operation state of the steering wheel switch 18 due to the occurrence of an abnormality.

Further, in the first embodiment, since the signal lines of the steering switch 18 and the select switch 30 are shared, the number of input terminals of the control unit 32 can be reduced and the harness can be reduced. The number of the control circuits can be reduced, and a low-cost control circuit can be provided as compared with the conventional example.

Next, a second embodiment of the present invention will be described with reference to FIG. In the second embodiment, the operation of the steering switch 18 is invalidated when the upshift switch US or the downshift switch DS of the select switch 30 is operated.

In the second embodiment, as shown in FIG. 2, the relay contact s of the self-holding type switch circuit 40 in the configuration of FIG. 1 in the first embodiment described above.
The ground side of 1 is connected to the normally closed contact t _NC of the downshift switch DS of the select switch 30 instead of the ground, and the left and right switches 18 of the steering switch 18 are connected.
The neutral contact t _N of L and 18R is made an empty contact, and
The movable contacts t _C of the left and right switches 18L and 18R are connected in parallel to the relay contact s1 of the relay circuit 38, and the signal lines LS11 and LS12 are respectively connected to pull-up resistors R11 and R12 whose one ends are connected to the DC power supply V _IG. Is
The other ends of the pull-up resistors R11 and R12 are connected to the inverting input side of the NAND circuit 50.
The output side of the signal line SL13 is connected to the fifth input terminal 32e of the control unit 32 through the signal line SL13.
2 and SL3 and diodes D1 and D2, D3 and D that prevent signals from sneaking into the signal lines SL11 and SL12.
1 has the same configuration as that of FIG. 1 except that the reference numeral 4 is inserted. Corresponding portions to those of FIG. 1 are denoted by the same reference numerals and detailed description thereof will be omitted.

According to the second embodiment, since the steering switch 18 is grounded via the self-holding type switch circuit 34 and the select switch 30, the select lever 1 is connected to the automatic shift path by the select device 1. In the state in which it is set to the 4 side, the manual mode switch MS of the select switch 30 has the automatic drive mode contact t
_It has been switched to the _A side, the main switch 36 is in the ON position, the self-holding type switch circuit 34 is in the ON state ,
Even when the operation of the steering switch 18 in which the relay contact s1 of the relay circuit 38 is closed is enabled, the operation of the upshift switch US and the downshift switch DS and the steering switch 18 in the select switch 30 is disabled.

At this time, the driver has selected to activate the steering switch 18 with the main switch 36 in the ON position, so that the self-holding contact s2 of the relay circuit 38 is closed in the operating state monitoring circuit 40. , The switching transistor Q1 is turned on and the lamp 42 is turned on to notify that the operation of the steering switch 18 becomes effective when the driver moves the select lever 2 to the manual transmission path 6 side. A notice is displayed.

In this state, when the select lever 2 is moved to the manual transmission path 6 side, the manual mode switch MS is switched to the manual mode contact t _M side, whereby the relay contact s1 of the self-holding type switch circuit 34. Is grounded via the downshift switch DS, the upshift switch US, and the manual mode switch MS of the select switch 30, and the operation of the steering switch 18 becomes effective.

At this time, if it is assumed that both the left switch 18L and the right switch 18R have been switched to the neutral contact t _N , in this state, the signal lines SL11 and SL1.
2 is at a high level and the output of the NAND circuit 50 is at a low level, the signal line SL13 is also at a low level, the input terminal 32e is at a low level, and the control unit 32 causes the left and right sides of the steering switch 18 to move. It can be recognized that the switches 18L and 18R are not operated.

In this state, if either of the left and right switches 18L and 18R of the steering switch 18 is switched to the upshift terminal t _U (or downshift terminal t _D ) side,
When the signal line SL11 (or SL12) becomes low level, the input terminal 32c of the control unit 32
(Or 32d) becomes a low level, and it can be recognized as an upshift (or downshift) request.

On the other hand, the upshift switch US (or the downshift switch DS) of the select switch 30 is normally opened by the select lever 2 on the select device 1 side.
When switched to the _NO side, it can be recognized that the input terminal 32c (or 32d) of the control unit 32 becomes low level and the upshift (or downshift) is requested as in the above case.

When an upshift (or downshift) request is issued on the side of the select switch 30, the upshift switch US (or downshift switch DS)
Is switched to the normally open contact t _NO side, the steering switch 18 is not connected to the ground, and the driver's erroneous operation can be prevented, and the upshift (or downshift) on the select switch 30 side is always performed. ) The request is prioritized and the interlock function can be exerted.

Also in the second embodiment, the operating state monitoring circuit 40 can detect the abnormality of the self-holding type switch circuit 34 and the steering switch 18, and the same effect as that of the first embodiment can be obtained. it can.

In the second embodiment, the manual drive mode is selected by the selector device 1, the main switch 36 is turned on, the self-holding switch circuit 40 is turned on, and the steering switch 18 is operated. In addition, when the select lever 2 is returned to the automatic transmission path 4 side with the lamp 42 lit, the manual mode switch MS is switched to the automatic mode contact t _A side so that the steering switch 18 can be operated. Although it is in the invalid state, the switching transistor Q1 is turned on and the lamp 42 is lit because the self-holding contact s2 is closed in the operation state detection circuit 40 at this time, and the driver feels uncomfortable. However, in order to solve this, as shown in FIG. By connecting the emitter of the switching transistor Q1 of the road 40 to the manual mode side contact t _M of the manual mode switch MS of the select switch 30 in place of the ground, as described above, manual self-holding switch circuit 40 is on state When the traveling mode is selected, the lamp 42 is turned on, and by switching from this state to the automatic traveling mode, the energizing path for the lamp 42 is cut off when the manual mode switch MS is switched to the ode mode contact t _A side. The lamp 42 can be turned off to prevent the driver from feeling uncomfortable.

Further, in the second embodiment described above, the case where the NAND circuit 50 is applied to detect the neutral state of the steering switches 18L and 18R has been described, but the present invention is not limited to this and two inputs are used. An OR circuit having an inverting input on the side may be applied, and an AND signal or a NOR circuit may be applied although the output signal form is reversed.

Furthermore, in each of the above embodiments, the case where the self-holding type switch circuit 34 is configured by the relay circuit 38 has been described, but the present invention is not limited to this, and the RS set and reset by the main switch 36 is used. Type flip-flop circuit and a switching element connected to the signal line SL14 of the steering switch 18 connected to the output side thereof.

Furthermore, in each of the above embodiments,
The operating state monitoring circuit 40 is composed of two transistors Q1 and Q2.
However, instead of this, both transistors Q1 and Q2 may be connected in parallel to the lamp 42, and further both transistors Q1 and Q2 may be connected.
Instead of 1 and Q2, other switching elements such as FET may be applied.

Furthermore, in each of the above embodiments,
Although the case where the lamp 42 is applied as the display device has been described, the present invention is not limited to this, and other light emitting elements such as a photodiode and a phototransistor can be applied, and the display operation state is turned on. The state may be changed to a blinking state, and further, a light emitting element such as a lamp or a photodiode may be turned on, and a shutter covering the light emitting element may be opened and closed by the operation state monitoring circuit 40.

In each of the above-described embodiments, the case where the select switch 30 is provided is described, but the present invention is not limited to this.
Steering switch 1 for manual mode selection
The present invention can be applied even when only 8 is provided.

[Brief description of drawings]

FIG. 1 is a control circuit diagram showing a first embodiment of the present invention.

FIG. 2 is a control circuit diagram showing a second embodiment of the present invention.

FIG. 3 is a control circuit diagram showing a modified example of the second embodiment.

FIG. 4 is a schematic view showing a selector device with a manual shift function.

FIG. 5 is a schematic view showing a steering switch provided on a steering wheel.

FIG. 6 is a diagram showing a control circuit of a conventional automatic transmission with a manual shift function.

[Explanation of symbols]

1 Select device 2 Select lever 16 steering wheel 18 Steering switch 18L left switch 18R right switch 30 Select switch MS Manual Mode Switch US upshift switch DS downshift switch 32 control unit 34 Self-holding switch circuit 36 Main switch 38 Relay circuit 40 Operating state monitoring circuit 42 lamp (display)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-61755 (JP, A) JP-A-6-17911 (JP, A) JP-A-5-196118 (JP, A) JP-A-3- 258621 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) F16H 59/00-63/48

Claims (8)

(57) [Claims] 1. A select device for selecting one of an automatic drive mode and a manual drive mode by operating a select lever, and a steering wheel mounted on a steering wheel for individually detecting selection of an upshift and a downshift. In a control circuit of an automatic transmission with a manual shift function, which is provided with a switch and a control unit for performing setting control of a predetermined shift stage in the automatic transmission based on a switch signal of the steering switch, the control circuit is connected to the steering switch in series. When the steering switch is turned on / off by the driver's intention and the ignition switch is turned off.
In addition, the self-holding switch circuit that automatically returns to the off state is provided, and the self-holding switch circuit is connected to the selection device so that the self-holding switch circuit is activated when the selection lever selects the manual drive mode. A control circuit for an automatic transmission with a manual shift function, which has a relay circuit. 2. A select device for selecting either an automatic drive mode or a manual drive mode by operating a select lever, and a steering wheel mounted on a steering wheel for individually detecting that an upshift or a downshift is selected. In a control circuit of an automatic transmission with a manual shift function, which is provided with a switch and a control unit for performing setting control of a predetermined shift stage in the automatic transmission based on a switch signal of the steering switch, the control circuit is connected to the steering switch in series. When the steering switch is turned on / off by the driver's intention and the ignition switch is turned off.
And a self-holding switch circuit that automatically returns to an off state , and an operating-state monitoring unit that monitors the operating states of the self-holding switch circuit and the steering switch. A control circuit for an automatic transmission with a manual shift function, which has a relay circuit connected to a selector so as to be effective when the manual drive mode is selected. 3. The self-holding switch circuit operation monitoring unit that monitors whether or not the self-holding switch circuit is in the working state, and the switch operation of the steering switch is valid. A steering switch operation monitoring unit that monitors whether or not the self-holding switch circuit operation monitoring unit is in an operating state, and a steering switch operation monitoring unit is in a steering switch operating state. The control circuit of the automatic transmission with a manual shift function according to claim 2, further comprising: a display device that is activated when any one of the following conditions is detected. 4. The self-holding type switch circuit operation monitoring unit has a switching element for detecting a current-carrying state of the self-holding type switch circuit, and displays the indicator when the switching element is turned on. The control circuit of the automatic transmission with a manual shift function according to claim 3, wherein the control circuit is configured to operate. 5. The steering switch operation monitoring unit has a switching element for detecting an energizable state of the steering switch, and is configured to display-operate the display when the switching element is turned on. The control circuit for an automatic transmission with a manual shift function according to claim 3 or 4, wherein: 6. One end of the switching element is connected to the display unit, and the other end is grounded via a manual mode side contact of a switch section for detecting a manual running mode provided in the selection device. A control circuit for an automatic transmission with a manual shift function according to claim 4 or 5. 7. The self-holding type switch circuit is provided in a select device, and is grounded via a select switch for individually detecting selection of upshift and downshift in the manual drive mode. A control circuit for an automatic transmission with a manual shift function according to any one of claims 1 to 6. 8. The self-holding switch circuit has a relay contact and a self-holding contact that are turned on when the relay coil is energized, and the relay contact is interposed between the select switch and the steering switch. ,
8. A control circuit for an automatic transmission with a manual shift function according to claim 1, comprising a self-holding contact of the relay circuit and a momentary switch inserted between the relay coils. .