JP3376778B2 - Electronic control unit with position detection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission, and more particularly, to an electronic control device for controlling the automatic transmission and a range position selected by a driver's selection operation and outputting it to the electronic control device. The present invention relates to an electronic control device with a position detection device that is integrated with a position detection device.

[0002]

2. Description of the Related Art Conventionally, in an automatic transmission, a hydraulic control device incorporated in its main body is controlled by an electronic control device,
The automatic transmission main body and the electronic control unit are separately mounted in different parts of the vehicle, and are configured to automatically change gears within a range selected by a driving operation. Both of these devices are individually and individually subject to sufficient quality control, but since they must exhibit the desired performance when they are finally connected, quality control in the connected state is also necessary. Is. By the way, since the connection between the main body of the automatic transmission and the electronic control device is carried out when the vehicle is installed, the automatic transmission main body and the electronic control device to be combined up to that point should be managed in a one-to-one correspondence relationship. However, adjustments must be made to match the two after they are mounted on the vehicle. Under these circumstances, comprehensive quality control of an automatic transmission is difficult and requires many man-hours.

Therefore, an attempt has been made to integrate the automatic transmission main body and the electronic control unit to enable quality control in which the two are in a one-to-one correspondence before being mounted on a vehicle. An example of this is the technique disclosed in Japanese Patent Publication No. 5-70023. In this technology, in order to output the range position selected by the vehicle driver's selection operation to the electronic control device as an electric signal, the electronic control device is installed in the case of the neutral start switch conventionally mounted on the automatic transmission casing. By incorporating them, the automatic transmission body and the electronic control unit are integrated.

[0004]

By the way, the neutral start switch not only functions as a select position detecting device which converts a mechanical operation of a shift lever by a driver into an electric signal and outputs the electric signal to an electronic control device. Instead, it also functions as a switch that closes the starter motor starting circuit at the parking range "P" position and neutral range "N" position and closes the reverse lamp lighting circuit at the reverse range "R" position. It is said that. Then, when the latter function is achieved, particularly when the starter motor is started, a large current, which is incomparable to that for achieving the former function, flows through the switch.

From the above viewpoint, when the above-mentioned prior art is viewed,
If the electronic control unit and the neutral start switch are arranged in the same case as in the technology, a large current flowing at the start of the starter motor and during the reverse lamp lighting may affect the electronic control unit that operates with a small current. There is concern about sex. Therefore, in order to avoid such an influence, it is conceivable that the installation space of the electronic control unit and the installation space of the switch unit are completely separated in the case. The combined space becomes large as a whole occupying the space, and when the automatic transmission is mounted on the vehicle, the arrangement position of other equipment is restricted in relation to other equipment in the engine room, You will interfere with them.

Therefore, in the present invention, when the electronic control unit and the position detecting device are integrated as described above, the switch unit and the electronic control unit are completely installed so that the switch unit does not affect the electronic control unit. The first purpose is to make the apparatus compact as a whole while separating the apparatus.

Next, according to the present invention, in which the electronic control device and the position detection device are integrated as described above, it is necessary to prevent an electrical influence on the electronic control device from a switch section handling a large current. The purpose is 2.

[0008]

In order to achieve the above object, the present invention is directed to a position detecting device for detecting the position of a shift lever in response to a driver's operation, and an automatic gear shift according to a signal indicating a vehicle running state. An electronic control device with a position detection device, which is integrated with an electronic control device for controlling a machine and is attachable to an automatic transmission casing, wherein the position detection device includes a case and a first fixing device fixed to the case. With a cover,
A movable member disposed rotatably in response to a shift lever operation by a driver in a first space surrounded by the case and the first cover, and between the movable member and the first cover. Between the movable member and the case, and a first switch portion electrically connected to a predetermined circuit provided on the first cover when the shift lever is at a predetermined position. A second switch portion which is provided and outputs a signal corresponding to the position of the shift lever,
The electronic control device includes: the case; a second cover fixed to the case; and an electronic control device substrate fixed to the case in a second space surrounded by the case and the second cover. And a circuit connected by the first switch section is connected to a terminal of a connector integrally formed with the first cover via a connection line integrated with the first cover. The second switch portion is connected to the electronic control device board through a connection line integrated with the case.

In order to achieve the second object, the first
The current flowing through the circuit connected by the switch section is larger than the current flowing through the electronic control unit substrate.

[0010]

According to the present invention, in the device in which the position detecting device and the electronic control device are integrated, the switch portion of the position detecting device is constructed by using both surfaces of the movable member. Therefore, the position detecting device becomes compact as compared with the case where the switch portion is configured by using only one surface of the movable member, and thereby the entire electronic control device with the position detecting device becomes compact.

Further, as described above, by utilizing the fact that the switch portion is constructed by using both sides of the movable member, one of the first switch portions is provided with a predetermined position when the shift lever is in a predetermined position. It becomes possible to divide the circuit into a switch part that electrically connects and the other second switch part to a switch part that outputs a signal corresponding to the position of the shift lever. Not the above circuit as an independent circuit, which is separate from the case 1st
The second switch portion requiring signal transmission and the electronic control device substrate can be integrated with the cover of FIG. 1 and can be connected to the case by a connecting line integrated with the case. Therefore, the circuit and the first switch section, the electronic control unit, and the second switch section are provided in the case and the first switch section.
It can be connected without the need for connecting wires or joining the contacts across the cover of, thereby reducing the connection work that requires processing man-hours, avoiding the occurrence of connection defects and contact defects,
Moreover, the disassembly and assembly of the device can be facilitated.

According to the second aspect of the invention, the large current flowing through the circuit connected by the first switch section affects the current flowing through the second switch section and the electronic control unit connected thereto. And the reliability of the electronic control device is improved.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. As shown in the cross section in FIG. 1, this electronic control device with position detecting device includes a case 10, a first cover 20, a second cover 30, a movable member 40, and an electronic control device substrate 50. Has been done. Hereinafter, these components and their mutual relations will be described in detail in order.

First, the case 10 is made of a resin material having a good electric insulation property, and has a fan-shaped switch chamber 11 which surrounds the first space S1 on the rear surface side, as shown in the front and rear surfaces in FIGS. , A rectangular electronic control unit chamber 12 surrounding the second space S2 on the front side is combined, and both chambers are separated by a partition wall 13 (see FIG. 1). The switch chamber 11 of the case 10 is arranged such that its fan-shaped key portion is displaced from the electronic control unit chamber 12, and the sleeve shaft portion 43 (see FIG. 1) of the movable member 40 is fitted and inserted in the position of the key portion. Further, a stepped hole 19 is formed for inserting the oil seal 6 (see FIG. 1) that seals the periphery thereof.
On the other hand, on the side of the electronic control unit room 12, an integrally molded connector 1 for transmitting and receiving signals, which is provided projecting from two sides of the rectangle.
4, 15 are formed. The case 10 is provided at a substantially diagonal position of the electronic control unit room 12 with the automatic transmission casing C.
A pair of mounting flanges 16 formed with bolt insertion holes for fixing to (see FIG. 1) are projected.

Next, the first cover 20 is made of the same material as that of the case 10, and has a fan shape that corresponds to the outer shape of the switch chamber 11 of the case 10 as shown in FIG. It is shaped so as to be fitted and positioned with respect to 10. Similar to the case 10, the sleeve shaft 43 of the movable member 40 is inserted into the key portion of the fan of the first cover 20, and the oil seal 6 that seals the periphery thereof is provided.
Is formed with a stepped hole 21 for inserting and inserting a connector 22 integrally formed. Then, on the edge of the mating surface of the case 10 with the switch chamber 11,
A seal ring groove 23 for fitting an O-ring is formed around the periphery.

The second cover 30 is formed in the shape of a rectangular plate made of a material such as aluminum having good heat conductivity, and is formed as shown in FIG.
~ As shown in Fig. 7 for the outer surface, the inner surface, and the side surface, a plurality of parallel heat radiation fins 31 are provided on the outer surface, and heat transfer protrusions 32 are integrally formed on the inner surface so as to project. A seal ring groove 33 for fitting an O-ring is formed around the periphery of the mating surface 10 of the electronic control unit chamber 10. Then, the plurality of mounting flange portions 34, which are formed to project intermittently along the peripheral edge, are fixed by screws to the case 1
It can be tightened to the front side of 0.

The movable member 40 is made of the same material as that of the case 10, and has a sleeve shaft portion 43 having a hole 42 through which a manual shaft is inserted, at one end of a plate-like arm portion 41. The hole 42 has a cylindrical shape in a portion having a length approximately half the axial length thereof, and has a remaining half length having a two-face width in which the opposite circumferential surfaces of the cylinder are cut out in parallel. The movable member 40 has the stepped hole 19 of the case 10.
And the sleeve shaft portion 4 in the stepped hole 21 of the first cover 20.
3 is rotatably fitted, and the arm portion 41 is sandwiched between the case 10 and the first cover 20 and is disposed in the first space S1 surrounded by them. A pair of oil seals 6 seal between the shaft periphery of the sleeve shaft portion 43 and the stepped holes 19, 21. Further, electrically insulating grease is filled in the space, and wear of the first and second switch parts SW1 and SW2, that is, the fixed contacts Pp and P.
It acts as a lubricant for preventing wear of s, Ps ′, Pr and a conductor (not shown) provided on the rotor 40.
Since the grease covers the first and second switch parts SW1 and SW2 as a lubricant, even if water or dust enters the space, a short circuit between the contacts does not occur.

As shown in FIG. 1, a first switch section SW1 is formed between the movable member 40 and the first cover 20. The first switch portion SW1 is formed by stamping from a strip-shaped connecting line 24 embedded in the first cover 20, and is exposed to the inner surface of the first cover 20 as shown in FIG. Starter motor circuit contacts Ps, P
s ′ and a pair of reverse lamp lighting circuit contacts Pr,
The movable member 40 is composed of a conductor (not shown) fixed to the arm portion 41 of the movable member 40 and connecting the pair of contacts to each other. In this embodiment, the connection line 24 is guided as it is to the inside of the connector 22 and serves as a terminal 28. Thus, the connection line 24 constitutes a circuit in the first cover 20 that returns from the connector terminal 28 to the same terminal and is completed independently of the case 10 only by the first cover 20.

Further, a second switch section SW2 is formed between the movable member 40 and the case 10, and the second switch section SW2 is the inner surface of the switch chamber 11 of the case 10 in this embodiment. A large number of contacts Pp formed by stamping from the strip-shaped connecting wire 17 fixed to the movable member 40.
And a conductor (not shown) fixed to the arm portion 41 of the. The connecting wire 17 integrated with the contact Pp is the case 1
It is led out to the substrate connecting pad portion in the second space S2 through the partition wall 0 of 0, and is connected to the terminal portion of the electronic control device substrate 50 there by using means such as wire bonding. As described above, the connection line 17 is connected to the position detection device (NSW) and the electronic control device (EC) in the case 10.
U) to directly connect with.

The electronic control unit substrate 50 has a second space S2.
It is positioned so as to be in contact with the inner step portion, and is connected to the terminal connection wire group 18 of the two connectors 14 and 15 at the pad portion by the same means such as wire bonding.
Each terminal connection wire group 18 passes through the inside of the case 10 and is led out into the connectors 14 and 15 to serve as their connection terminals. These connectors 14 and 15 are connected to a solenoid valve and various sensors of a hydraulic control device arranged in the main body of the automatic transmission, sensors of various parts of the vehicle, and an engine control device.

As shown in FIG. 1, the electronic control unit with position detecting device constructed as described above has an automatic transmission casing C.
The rotation of the shift lever L on the shift device side about the axis X is transmitted to the outer lever A on the main body of the automatic transmission through the control wire W, as shown schematically in FIG. Then, the manual shaft S rotates. And the rotation of this manual shaft S
The movable member 40 (shown in phantom in the figure) attached to it is rotated. The figure shows a state in which the shift lever L is in the neutral range “N” position. From this state, when the lever L is pushed forward, that is, in the reverse range “R” or parking range “P” position direction, the wire W is pushed. As a result, the outer lever A rotates in the direction of the outlined arrow, and the lever L is also moved backward, that is, the drive range "D", the third range "3", the second range "2",
When pulled in the low range “L” position direction, the outer lever A is pulled by the wire W and rotates in the direction of the black arrow shown in the figure. With such an operation, the switching of the switch portion of the position detecting device and the sliding switching operation of the manual valve M in the valve body B of the hydraulic control device occur.

In such an operation, the position detecting device side
At the neutral range “N” and the parking range “P” positions, the starter contacts Ps and Ps ′ shown in FIG. 4 are closed, and at the reverse range “R” position, the reverse contact Pr is closed, and in parallel, 2 switch section SW2
Outputs the corresponding neutral range "N", parking range "P" position signal or reverse range "R" position signal to the electronic control unit substrate 50 by closing the similar contacts. In addition to the drive range “D” position, the second switch section S is also provided at each range “3”, “2”, “L” position.
Only W2 is activated, and the closing of those contacts causes a corresponding position signal to be output to the electronic control unit board 50 via the connecting line 17.

As described above, in short, in the present embodiment, the electronic control unit (ECU) and the position detecting device (NSW) are separately arranged in separate chambers in the case 10 and mechanically connected to the outside of the case 10. Since the movable member 40 is housed, the electronic control unit is prevented from being affected by the position detection device that is easily affected by intrusion of dust, water, and the like, and the switch parts SW1 and SW2 are separately arranged on both sides of the movable member 40. This reduces the radial dimension of the position detecting device, and utilizes the external characteristics of the position detecting device and the electronic control device to wrap them in the axial direction and the radial direction, thereby making the device compact.

Furthermore, the circuit of the signal system that needs to be taken into the electronic control unit and the circuit of the power system that does not need it (starting the star motor and lighting the reverse lamp) are distributed to both sides by sandwiching the movable member 40. The case 10 and the first cover 20 are independent of each other, so that the power system circuit including the connector 15 is completely isolated from the signal system circuit of the position detection device and the electronic control device, so that there is no electrical influence. It is shut off.

In addition, in this embodiment, the electronic control unit (ECU) and the position detection unit (NSW) are separately arranged in separate chambers in the case 10, and the second cover on the electronic control unit installation side is provided. Since the position detection device side is not affected even when the position detection device 30 is removed, the electronic control device substrate 50 can be easily replaced. Therefore, by replacing the substrate according to various specifications, the position detection device can be commonly used. It is possible to obtain the advantage that the device can be generalized. And these advantages are
As can be seen from the manner in which the device shown in FIG. 1 is attached to the automatic transmission casing C, the second front face of the case 10 that can be operated by removing the cover 30 while the case 10 is still attached to the automatic transmission casing C. It becomes more prominent by disposing the electronic control device substrate 50 in the space S2.

The present invention has been described above in detail based on the embodiments. However, the present invention is not limited to the disclosure of the above embodiments, and various details can be obtained within the scope of the matters described in the claims. It goes without saying that the specific configuration can be changed and implemented. In particular, the specific configuration of the second switch portion, that is, the position switch, can take various configurations depending on the type of switch used. For example, when the switch is an optical sensor, a light emitting portion is provided on the case side. The light receiving portion is provided and the reflecting surface is provided on the movable member. When the switch is a magnetic sensor provided on the case side, the facing surface on the movable member side is a magnetic body, a gap, or the like. .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of an electronic control device with a position detecting device of the present invention.

FIG. 2 is a front view of the case in the above embodiment.

FIG. 3 is a rear view of the case.

FIG. 4 is an inside view of the first cover in the above embodiment.

FIG. 5 is an external view of a second cover in the above embodiment.

FIG. 6 is an inside view of the second cover.

FIG. 7 is a side view of the second cover.

FIG. 8 is an arrangement explanatory view showing a connection relationship between the automatic transmission main body and the shift device of the electronic control device with the position detection device according to the embodiment.

[Explanation of symbols]

NSW position detector ECU electronic control unit L shift lever C automatic transmission casing 10 cases 14,15,22 connectors 17,24 connection line 20 First cover 28 terminals 30 Second cover 40 movable members 50 Electronic controller board S1 first space S2 Second space SW1 First switch section SW2 Second switch section

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiya Morishita 10 Takane, Fujii-cho, Anjo City, Aichi Prefecture Aisin AW Co., Ltd. (72) Naoto Ogasawara 10 Takane, Fujii-cho, Anjo City, Aichi Prefecture Aisin・ In AW Co., Ltd. (72) Inventor Naotaka Murakami 10 Takane, Fujii-cho, Anjo City, Aichi Prefecture・ AW Co., Ltd. (56) Reference JP-A-8-58417 (JP, A) JP-A-6-129516 (JP, A) JP-A-6-80039 (JP, A) Actual Kaihei 6- 24260 (JP, U) (58) Fields surveyed (Int.Cl. ⁷ , DB name) F16H 59/00-61/12 F16H 61/16-61/24 F16H 63/40-63/48 B60K 20/00 -20/08

Claims (2)

(57) [Claims] 1. An automatic gear shift system in which a position detection device that detects the position of a shift lever according to a driver's operation and an electronic control device that controls an automatic transmission according to a signal indicating a vehicle running state are integrated. In the electronic control device with position detecting device attachable to a machine casing, the position detecting device includes a case, a first cover fixed to the case, and a first cover surrounded by the case and the first cover. A movable member rotatably arranged according to a driver's operation of the shift lever, and provided between the movable member and the first cover, and the shift lever is at a predetermined position. A signal corresponding to the position of the shift lever, which is provided between the movable member and the case, and a first switch portion that electrically connects a predetermined circuit provided on the first cover at a certain time. Out And a second cover fixed to the case, and a second space surrounded by the case and the second cover. An electronic control device substrate fixed to the case, and a circuit connected by the first switch unit is integrated with the first cover via a connection line integrated with the first cover. With a position detecting device, wherein the second switch part is connected to a terminal of a mechanically formed connector, and the second switch part is connected to the electronic control device substrate through a connection line integrated with the case. Electronic control unit. 2. The electronic control device with a shift position detecting device according to claim 1, wherein a current flowing through a circuit connected by the first switch section is larger than a current flowing through the electronic control device substrate.