JP2861596B2 - Operation device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION This invention relates to the use of the select switch off
Motor by a control signal from the controller based on the
The present invention relates to an operation device for driving and controlling the like .

[0002]

BACKGROUND OF THE INVENTION For example automatic transmission for a vehicle, each
Switching of the range switching valve (manual valve) for selecting the type range is generally performed by manual operation.
From the control unit based on the selection switch operation.
Has been already proposed.

When the shift range is selected by electric control as described above, a failure in every situation is assumed and a countermeasure (fail-safe countermeasure) is required. Therefore, for example, in an automatic transmission disclosed in JP-A-59-45224, the switching control of the shift range is usually performed by a dedicated control unit (ECU).
In the event that a failure occurs in the control unit, the control unit for the purpose of another control (control of the parking mechanism) detects the failure and substitutes the shift range switching control.

[0004]

In the technique disclosed in the above-mentioned publication, the reliability of the control unit for switching and controlling the shift range with respect to the failure can be enhanced. However, each contact of a switch for sending a shift range switching signal to this control unit,
Alternatively, when a failure such as a short circuit occurs in a signal line connecting these contacts and the control unit, the failure cannot be detected.

[0005] The technical problem of the present invention, for example, a predetermined control unit than for controlling switching the shift range of the automatic transmission
When a signal line to an external control unit is short-circuited due to a circuit failure or the like, it can be detected by a predetermined control unit, so that such a failure can be promptly dealt with. is there.

[0006]

Means for Solving the Problems] operation apparatus of the present invention to solve the above problems is configured as follows.

[0007] That is, in the operating device for transmitting a control signal from a predetermined controller to have <br/> group Dzu the switching operation of the select switch, a signal line connecting said a select switch cq contact and the contact and the control unit Both are set in parallel,
And are characterized in that one of the signal lines of the plurality parallel also serves as a signal line to the control unit other than the control unit
You .

[0008]

According to this structure, even if a signal line also serving as a signal line to a control unit other than the predetermined control unit is short-circuited due to a circuit failure of the control unit, the signal line is connected in parallel with the signal line. The signal output from the predetermined control unit based on the switching operation of the select switch can be continued by the signal line of (1). In addition, the failure can be detected by a predetermined control unit, and prompt response to the failure is possible.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention is applied to an operating device for an automatic transmission for a vehicle.
An embodiment applied to (1) will be described.

FIG. 2 is a perspective view showing a supporting structure of the shift lever 10, and FIG. 4 is a plan sectional view showing the supporting structure. In these drawings, the support member 40 of the shift lever 10 is fixed, for example, inside a column cover of a steering column (not shown). A substantially intermediate portion of the shift lever 10 is supported by the support member 40 by a free support portion 42 so that a shift operation is possible.

The free support section 42 has two pins 42a and 42b arranged so that their axes are orthogonal to each other. One of the pins 42a serves as a fulcrum about the support member 40 when the shift lever 10 is operated together with the free support portion 42 in the direction of the arrow aa in FIG. 2, and the other pin 42b moves the shift lever 10 in the direction of the arrow b-. It becomes a pivot point with respect to the free support portion 42 when operated in the direction b. With this support structure, the shift lever 10 can be operated to each range position for selecting each shift range of the automatic transmission.

A plate 46 is provided inside the support member 40.
Has been fixed. The plate 46 has a guide hole 4 having a shape corresponding to the operation pattern of the shift lever 10.
8 is open. The tip of the shift lever 10 is located on the back side of the plate 46 through the guide hole 48.

FIG. 3 is a plan view showing the relationship between a guide hole 48 formed in the plate 46 and each range position of the shift lever 10. As shown in FIG. As is apparent from this drawing, a first operation line C1 for operating the shift lever 10 to each of the range positions P and R for selecting a parking (P) range and a reverse (R) range of the automatic transmission is provided. , Neutral (N) range and drive (D) range for selecting each range position N,
D, a second operation line C for operating the shift lever 10
2 is offset parallel to each other.

On the third operation line C3 orthogonal to the second operation line C2 at the position of the range position D, a forward traveling range (3, 2,
L) Range positions UP and DW for selecting
They are distributed and set on both sides with the range position D as the center.

The operation of the shift lever 10 in the direction of the arrow aa is an operation in the direction along the first and second operation lines C1 and C2, and the operation in the direction of the arrow bb is these operations. Direction perpendicular to the lines C1 and C2 (the third operation line C3
(Including directions along).

On the front side of the plate 46, a detent member 50 is fixed. The surface of the detent member 50 is formed such that portions of the shift lever 10 corresponding to the respective range positions P, R, N, and D are concave portions. A detent ball 52 is attached to the shift lever 10 in a state where the detent ball 52 is pressed against the surface of the detent member 50 by the force of a spring 54.

By the function of the detent member 50 and the detent ball 52, the shift lever 10 is positioned at each of the range positions P, R, N, and D, and gives a sense of moderation to the operation. In addition, this detent function allows the shift lever 10 to be returned to the range position D each time the operating force is released even if the shift lever 10 is operated from the range position D to any of the range positions UP and DW. ing.

FIG. 1A is a perspective view showing the structure of a select switch SW which is arranged on the back side of the plate 46 and is switched by operating the shift lever 10. As shown in FIG. As is apparent from this drawing, a fixed contact 60E for grounding is provided on the plate 46 continuously in the direction of movement of the tip portion when the shift lever 10 is operated in the direction of the arrow aa. .

The plate 46 also has the above-mentioned range positions P, R, N,
The fixed contacts 60P,
60R, 60N, and 60D are fixed contacts 6 for the ground.
They are arranged on a line parallel to 0E. Plate 4
6 are provided with fixed contacts 60UP and 60DW corresponding to the range positions UP and DW of the left lever 10, respectively. Moreover, the fixed contacts 60P, 60R, 6 corresponding to the range positions P, R, D of the shift lever 10
Two pieces of 0D are arranged in parallel.

In FIG. 1A, movable contacts 56 and 57 extending left and right in the figure and a movable contact 58 extending downward are provided at the tip of the shift lever 10, respectively. One movable contact 56 of the movable contacts 56, 57 extending to the left and right is always in contact with the fixed contact 60E for grounding even when the shift lever 10 is operated. The other movable contact 57 is moved to the fixed contact 60 by the operation of the shift lever 10 in the direction of the arrow aa.
One of P, 60R, 60N, and 60D can be selectively contacted. However, two parallel fixed contacts 60
Two movable contacts 57 come into contact with P, 60R, and 60D at the same time.

When the shift lever 10 is in the range position D, the movable contact 58 extending downward is indicated by the arrow bb.
When operated in the direction, it is possible to contact any one of the fixed contacts 60UP and 60DW according to the operation direction. Even when the movable contact 58 is in contact with one of the fixed contacts 60UP and 60DW, the movable contact 56 is in contact with the fixed contact 60E for grounding.

FIG. 1B shows a circuit configuration of the select switch SW together with a range control unit (SBW) 20 and an automatic control unit (ECT) 22 described below. As is apparent from this drawing, the movable contacts 56 and 57 are connected to the fixed contact 60E for grounding and the fixed contacts 60P and 60P.
Any of R, 60N, and 60D can be electrically connected. In this case, two fixed contacts 60P, 60
Of course, R and 60D are simultaneously connected to the grounding fixed contact 60E at a time.

In the connection state between the fixed contact 60E for ground and the fixed contact 60D for D range, either of the fixed contacts 60UP and 60DW can be electrically connected to the fixed ground contact 60E by the movable contact 58. It is.

The above-mentioned fixed contacts 60P, 60R, 6
0N, 60D terminals 64P, 64R, 64N, 64D
Are the respective signal lines 66P, 66R, 66N, 66D
Is connected to the range control unit 20 via For the two parallel fixed contacts 60P, 60R, 60D, two terminals 64P, 64R, 64D and two signal lines 66P, 66R, 66D are also connected in parallel. Moreover, these parallel signal lines 66P, 66R, 66
In D, one of them also serves as a signal line to the automatic transmission control unit 22.

FIG. 5 is a system diagram of electric control for selecting a shift range of the automatic transmission AT. In this drawing, a motor (DC motor) 30 can switch a range switching valve (not shown) of the automatic transmission AT by driving the motor. As is well known, a line hydraulic pressure (basic hydraulic pressure) of the automatic transmission AT is supplied to the range switching valve, and a friction engagement device (not shown) for setting each shift range by switching its discharge port. Is controlled.

The range control unit 20 shown in FIG.
Uses a microcomputer and automatic transmission AT
Read-only memory (R) storing programs necessary for various software processes for shifting the shift range
OM), a central processing unit (CPU) that executes the program, a writable memory (RAM) that temporarily stores variables necessary for the program, and the like.

A microcomputer is also used for the automatic transmission control unit (ECT control unit) 22 also shown in FIG. 5, and this automatic transmission control unit 22 controls the automatic transmission AT to each shift speed as is well known. Automatic switching can be controlled based on the vehicle speed and the throttle opening.

The range control unit 20 includes an electric signal from the select switch SW which is switched based on the operation of the shift lever 10 and a detection output from a valve position sensor 32 for detecting the range position of the range switching valve. The signals are input together. A drive signal corresponding to the electric signal from the select switch SW is output from the range control unit 20 to the drive circuit of the motor 30, and an electric signal from the select switch SW and the valve position sensor 32 is output. Is output to the automatic transmission control unit 22, the range indicator 34, and the voice navigation control unit 36, respectively.

The range indicator 34 is provided on an instrument panel or the like in front of the driver's seat, and includes an automatic transmission A based on a range signal output from the range control unit 20.
A display portion corresponding to the shift range of T is turned on. Further, the voice navigation control unit 36 has a function of issuing a voice from the speaker 38 to warn the driver when the contact of the select switch SW fails as described later or erroneous operation of the select switch SW.

When the shift lever 10 is operated in the above configuration, a signal is input from the select switch SW to the range control unit 20 in accordance with the range position,
In response to this, the drive amount of the motor 30 is controlled based on the drive signal output from the range control unit 20. As a result, the range switching valve (not shown) of the automatic transmission AT is switched, and the parking mechanism (not shown) is operated to select the shift range of the automatic transmission AT.

By operating the shift lever 10 from the range position D of FIG. 3 to the range position DW,
When the fixed contact 60E and the fixed contact 60DW for grounding in the select switch SW are connected (turned on) once, three ranges are set. When the fixed contact is turned on twice, two ranges are turned on. And L range. Conversely, by operating the shift lever 10 from the range position D to the range position UP, the ground fixed contact 60E and the fixed contact 60UP are repeatedly turned on, so that the travel range is L → 2 → 3 → D by one range. Up.

When the shift lever 10 is operated from the range position D to the range position UP or DW side, the display of the D range of the range indicator 34 shown in FIG. "
The shift range changes to "2" or "L" and is displayed.

Now, in the select switch SW, the fixed contacts 60P, 60R, 60D for the ranges P, R, D
The two signal lines 66P, 66R, and 66D are in parallel as described above. Therefore, even if a failure such as a contact failure between any of the fixed contacts 60P, 60R, and 60D and the movable contact 57 occurs, a signal is appropriately output from the remaining contact to the range control unit 20, and the automatic transmission is changed. The shift range of the machine AT is switched and controlled. Regardless of the operation of the select switch SW, when no signal is input to the range control unit 20, the fixed contact 60N and the movable contact 57 for the neutral range N are used.
The automatic transmission AT is switched to the neutral range N as a failure between.

Thus, even if a failure occurs at any of the contact points in each range position, the range switching control of the automatic transmission AT is continued. Moreover, when such a failure occurs, the range control unit 2 is switched from the select switch SW.
Since the signal to 0 changes, the occurrence of a failure is detected, and a signal is sent to the voice navigation control unit 36 shown in FIG.

The ranges P, R,
One of the signal lines 66P, 66R, and 66D for D also serves as the signal line to the automatic transmission control unit 22, so that the signal line is short-circuited by the circuit failure of the automatic transmission control unit 22. Even if it does, this is immediately detected by the range control unit 20. Therefore, also in this case, a voice is output from the speaker 38 of the voice navigation control unit 36 to prompt the driver to take an appropriate action.

[0036]

The present invention is applicable to , for example, an automatic transmission.
Even when a signal line that also serves as a signal line to a control unit other than a predetermined control unit for switching control of the shift range is short-circuited, switching control of the shift range by operating the select switch is possible, In addition, the failure at this time can be detected by the predetermined control unit, whereby a prompt response can be made.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a structure of a select switch and a circuit configuration thereof.

FIG. 2 is a perspective view showing a support structure of a shift lever.

FIG. 3 is an explanatory diagram showing each range position of a shift lever.

FIG. 4 is a plan sectional view showing a support structure of a shift lever.

FIG. 5 is an electrical diagram for controlling an automatic transmission traveling range.

[Explanation of symbols]

 Reference Signs List 20 range control unit 22 control unit other than range control unit (automatic transmission control unit) AT automatic transmission SW select switch 60P fixed contact 60R fixed contact 60D fixed contact 66P signal line 66R signal line 66D signal line

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16H 59/00-63/48 B60K 20/00

Claims (1)

(57) [Claims] [Claim 1] based physicians in the switching operation of the select switch
In the operating device for transmitting a control signal from a predetermined controller Te, a signal line connecting the said select switchers contacts Ji and the contacts and before Symbol system <br/> control unit are both set in parallel a plurality of, and in parallel a plurality operation device one signal line is characterized in that it also serves as a signal line to the control unit other than the control unit of the.