JP4122850B2 - Electronic control device mounting structure for transmission - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a structure for mounting an electronic control device on a transmission.
[0002]
[Prior art]
Some vehicles include an electronic control unit (ECU) that controls a transmission. Conventionally, this type of ECU is often arranged in a vehicle compartment or an engine room, and there is no need to consider the influence of a stepping stone or the like. For example, Japanese Patent Application Laid-Open No. 63-219445 shows that the ECU is arranged in an engine room.
[0003]
[Problems to be solved by the invention]
In recent years, there has been a demand for mounting this ECU directly on the transmission in order to shorten the connection line connecting the transmission and the ECU that controls the transmission.
[0004]
However, when the ECU is directly mounted on the transmission in this way, the ECU is closer to the ground, and there is a possibility that a problem such as a stepping stone hitting the ECU or a connector connected to the ECU may occur. In order to prevent such stepping stones, it may be possible to newly provide a cover for protecting the ECU. However, this increases the number of parts and costs, which is not desirable.
[0005]
The present invention has been made in view of the above circumstances, and an object of the present invention is to electronically control a transmission that can protect an electronic control device mounted on the transmission from a stepping stone or the like without increasing the number of parts. It is to provide a device mounting structure.
[0006]
[Means for Solving the Problems]
In the following, means for achieving the above object and its effects are described.
An electronic control unit mounting structure for transmission according to claim 1, the electronic control unit the vehicle across transmissions in arranged condition so as to be exposed on the outer surface of that in the body portion of the transmission for controlling the vehicle transmission mounted from below in a recess provided in the under body of the said electronic control device busy Garrel so the gap between the lower falls between one side wall of the recess and the side wall of the transmission is the components of the vehicle The arrangement position of the structural member is set .
[0007]
According to the present invention, since the gap between the one side wall of the concave portion below the electronic control device and the one side wall of the transmission is closed by the vehicle component member, the electronic control device can be protected from the stepping stone. Further, since the configuration for closing the gap is not a new member attached to the vehicle, but the arrangement of the members already provided in the vehicle is changed, the electronic control device can be installed without increasing the number of parts. Can protect from stepping stones.
[0008]
The electronic control device mounting structure in the transmission according to claim 2 is the tunnel according to claim 1, wherein the recess provided in the underbody is formed in a tunnel shape so as to surround an upper side and a side of the transmission. It is a shape part. According to the present invention, the invention of claim 1 can be implemented by using the concave portion provided in the underbody as a tunnel-shaped portion.
[0009]
According to a third aspect of the present invention, there is provided a structure for mounting an electronic control device on a transmission according to the first or second aspect, wherein the vehicle component that closes the gap is an exhaust pipe of an engine mounted on the vehicle. . According to the present invention, the electronic control device can be protected from flying stones by the exhaust pipe. Further, the arrangement of the exhaust pipe can be easily changed so as to close the gap.
[0010]
According to a fourth aspect of the present invention, there is provided the electronic control device mounting structure in the transmission according to the first or second aspect, wherein the constituent member of the vehicle that closes the gap is a propeller shaft that transmits the power of the vehicle to the axle. To do. According to the present invention, the electronic control device can be protected from flying stones by the propeller shaft. Vehicles that can be provided with a propeller shaft in this way include, for example, front engine / rear drive type four-wheel drive vehicles.
[0011]
The electronic control device mounting structure to the transmission according to claim 5 is the junction portion between the electronic control device and a connector of a wire harness connected to the electronic control device according to any one of claims 1 to 4. Is directed toward the rear of the vehicle. According to the present invention, for example, compared to the case where the joint portion is directed to the front of the vehicle, it is possible to prevent the flying stones bounced by the front wheels and moving rearward when the vehicle moves forward from hitting the connector.
[0012]
According to a sixth aspect of the present invention, in the electronic control device mounting structure in the transmission according to any one of the first to fifth aspects, the electronic control device is fixedly installed closer to the front of the vehicle than the central portion in the axial direction of the transmission. It is characterized by. According to the present invention, an automatic transmission has a built-in torque converter, and a manual transmission has a built-in clutch, the electronic control unit is hidden behind the enlarged diameter portion at the front of the transmission, and the enlarged diameter portion functions as a barrier. Become. Therefore, it is possible to protect the electronic control device from flying stones flying from the front.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which an electronic control device mounting structure according to the present invention is applied to an automatic transmission (AT) mounted on a front engine / rear drive type two-wheel drive vehicle (FR2WD) will be described with reference to FIGS. To do.
[0014]
FIG. 1 is a schematic side view of an engine and a transmission, and FIG. 2 is a schematic diagram showing the relationship between the underbody of the vehicle and the transmission. FIG. 3 is a perspective view showing a part of the underbody of the vehicle, and FIG. 4 is a schematic plan view of the transmission.
[0015]
As shown in FIG. 1, this vehicle includes an engine 11 and a transmission 12 disposed behind the engine 11. On the other hand, as shown in FIG. 2, a tunnel-shaped portion 16 that is curved in a tunnel shape is formed in a portion corresponding to the position where the transmission 12 is disposed in the underbody 15 of the vehicle. The transmission 12 is accommodated in the tunnel-shaped portion 16 of the vehicle underbody 15. That is, as shown in FIG. 2, the upper side and the left and right sides of the transmission 12 are covered by the tunnel-shaped portion 16 and the lower side is exposed.
[0016]
The tunnel-shaped portion 16 is formed in accordance with the shape of the transmission 12 as shown in the perspective structure in FIG. 3, and the rear portion of the tunnel-shaped portion 16 corresponds to the shape of the rear portion of the transmission 12. The diameter of the taper decreases toward the rear.
[0017]
As shown in FIG. 1, the transmission 12 is roughly composed of a lower part 20 in which oil or the like is stored, a body part 21 in which various gears are incorporated, and a diameter-expanded part arranged on the engine 11 side. 22. Among these, the diameter of the enlarged diameter portion 22 is increased toward the side closer to the engine 11. A known torque converter is provided inside the enlarged diameter portion 22. FIG. 4 shows a planar structure of such a transmission 12.
[0018]
Further, as shown in FIG. 2, in this embodiment, the gap between the transmission 12 and the tunnel-shaped portion 16 is narrower on the left side 21a side than the right side 21b side when viewed from the front of the transmission 12. . A control shaft 23 for switching the gear stage of the transmission 12 is attached to the right side surface 21b, which is the wider side of the gap. Incidentally, the control shaft 23 is attached to the front side of the body portion 21. The control shaft 23 is connected to the other end of a shift cable having one end connected to a shift lever (not shown). In response to the operation of the shift lever via the shift cable, the control shaft 23 is Switch the gear stage.
[0019]
On the other hand, an ECU (ECT-ECU: transmission electronic control unit) 25 as an electronic control unit that controls the transmission 12 is attached to the left side surface 21 a of the transmission 12. The ECU 25 is also attached to the front side of the body portion 21 as shown in FIG. 1 or FIG. That is, the ECU 25 is fixed to the front side of the vehicle from the central portion of the transmission 12 in the axial direction.
[0020]
Hereinafter, with reference to FIG. 5, the ECU 25 and its peripheral structure will be described.
As shown in FIG. 5, a connector 26a of a wire harness 26 is connected to the ECU 25 via a joint portion 25a. More specifically, the ECU 25 is attached to the transmission 12 such that the joint portion 25a with the connector 26a faces the rear of the vehicle, and the connector 26a is connected to the ECU 25 from the rear of the vehicle.
[0021]
Further, as shown in FIG. 5, the ECU 25 is attached to the transmission 12 by tightening and fixing with screws 27a, 27b, and 27c. That is, on the left side surface 21a of the transmission 12, three bosses 28a, 28b, and 28c to which these screws 27a, 27b, and 27c are screwed are formed. Of these bosses, the boss 28a is formed at a position corresponding to the lower part on the back side of the ECU 25, the boss 28b is formed at the front center of the ECU 25, and the boss 28c is formed at a position corresponding to the upper part on the back side of the ECU 25. Yes. On the other hand, the ECU 25 is provided with attachment pieces corresponding to these bosses 28a, 28b, 28c, and these attachment pieces are fastened and fixed to the bosses 28a, 28b, 28c by the screws 27a, 27b, 27c, respectively. Thus, the ECU 25 main body is fixed to the transmission 12.
[0022]
Further, on the left side surface 21a of the transmission 12, together with the ECU 25 and the connector 26a, other connectors 29a, 29b, and 29c are attached to the rear portion. These connectors 29a, 29b, and 29c are connected to a solenoid (not shown), a rotation speed sensor, and a shift position sensor that are used for shifting operation and lockup of the transmission 12. The wire harness 26 is divided into wires 30a, 30b, and 30c and connected to the connectors 29a, 29b, and 29c. Moreover, this wire harness 26 branches in the middle and extends upward, and is connected to a battery or the like (not shown). A lower end portion of an oil level gauge 33 is attached to the front portion of the lower portion 20 of the transmission 12. The oil level gauge 33 extends upward. In FIG. 5, a portion “A” indicated by a broken line indicates a mounting position of the control shaft 23 on the right side surface 21 b which is an opposite surface of the transmission 12.
[0023]
On the other hand, in this embodiment, an in-line multi-cylinder engine is assumed as the engine 11. That is, one exhaust pipe is attached to this vehicle. The exhaust pipe, which is one of the constituent members of the vehicle, is opened downward in the space where the ECU 25 and the like are arranged as shown in FIG. In order to prevent this, the gap between the transmission 12 and the lower left end of the tunnel-shaped portion 16 is arranged to be closed. As a result, even if the stepping stone hits the floor of the vehicle while the vehicle is running, the exhaust pipe 43 acts as a barrier member to prevent the stepping stone from colliding with the ECU 25, the connector 26a and the like. Will be able to.
[0024]
As described above, according to this embodiment, the following effects can be obtained.
(1) An exhaust pipe 43 as a barrier member is disposed so as to close a gap between the lower end portion on the left side of the tunnel-shaped portion 16 covering the transmission 12 and the transmission 12. Therefore, the ECU 25 attached to the transmission 12 can be protected from flying stones by the exhaust pipe 43. In addition, the exhaust pipe 43 can also protect the connector 26a and the connectors 29a, 29b, 29c from flying stones.
[0025]
(2) A member (exhaust pipe) originally provided in the vehicle is made to function as a barrier member. Therefore, the ECU 25 can be protected from flying stones without increasing the number of parts.
[0026]
(3) Since the exhaust pipe 43 is selected as the barrier member, it is easy to change the arrangement according to the gap.
(4) As for ECU25, the junction part 25a with the connector 26a is orient | assigned to the vehicle rear. For this reason, for example, compared with the case where the joint portion is directed to the front of the vehicle, it is possible to prevent the stepping stones bounced by the front wheels and moving rearward when the vehicle moves forward from hitting the connector 26a. Therefore, for example, durability can be improved without using a high-cost material to increase the strength of the connector protective cover.
[0027]
(5) The ECU 25 is fixed to the front side of the vehicle from the central portion of the transmission 12 in the axial direction. Therefore, as shown in FIG. 4, the ECU 25 is hidden behind the enlarged diameter portion 22, and the enlarged diameter portion 22 acts as a barrier to protect the ECU 25 from flying stones flying from the front.
[0028]
In addition, you may change the said embodiment as follows, for example.
The position where the ECU 25 is attached is not limited to the left side surface 21 a of the transmission 12. For example, in the case of a four-wheel drive vehicle (4WD), as shown in FIG. 6, the gap between the transmission 12 and the tunnel-shaped portion 16 is opposite to that in the case of 2WD, and the right side surface 21b is narrower. For this reason, the control shaft 23 cannot be attached to the right side surface 21b, and is attached to the left side surface 21a as shown in FIG. In this case, since the ECU 25 is in the way of the control shaft 23 and cannot be mounted on the left side surface 21 a, the ECU 25 must be attached to the right side surface 21 b of the transmission 12. However, even in this case, the exhaust pipe 43 protects the ECU 25 and the connector 26a from stepping stones by routing the exhaust pipe 43 to the gap on the side where the ECU 25 is disposed as shown in FIG. It acts as a barrier member. As shown in FIG. 7, even if the connectors 29a, 29b, and 29c are present, they do not interfere with the control shaft 23. Therefore, the connectors 29a, 29b, and 29c are also connected to the transmission 12 as in the above embodiment. Can be attached to the left side surface 21a.
[0029]
As described above, when the control shaft 23 is attached to the left side surface 21a of the transmission 12 and the ECU 25 is attached to the right side surface 21b, the connectors 29a, 29b, and 29c may be attached to the right side surface 21b. Of course.
[0030]
-Some vehicles are not limited to having only one exhaust pipe, and for example, may have two exhaust pipes. For example, when the engine is a V-type engine, two exhaust pipes are provided corresponding to both the left and right sides of the transmission 12. In that case, at least the exhaust pipe on the side corresponding to the gap on the side where the ECU 25 is arranged is arranged so as to close the gap, and this is functioned as a barrier member.
[0031]
As described above, when the exhaust pipes are provided corresponding to both the left and right sides of the transmission 12, the left and right exhaust pipes are respectively closed so as to block the left and right gaps at the lower ends of the transmission 12 and the tunnel-shaped portion 16. You may arrange. In this case, since the exhaust pipe can function as a barrier member regardless of whether the ECU 25 is attached to the left side surface 21 a or the right side surface 21 b of the transmission 12, the exhaust pipe is newly arranged corresponding to the mounting position of the ECU 25. There is no need to change. In addition, the engine of the vehicle provided with the exhaust pipe corresponding to both the left and right of the transmission 12 is not limited to the V-type engine described above, and there is a horizontally opposed engine.
[0032]
-It is not limited to the configuration in which the mounting position of the control shaft 23 is changed to the left side or the right side of the transmission 12 depending on whether it is 2WD or 4WD. For example, even in the case of 4WD, a tunnel is formed so that a gap can be attached to the right side surface 21b. The shape portion 16 may be processed.
[0033]
The transmission 12 to be mounted by the ECU 25 is not limited to the AT but may be a manual transmission (MT). This is because the MT may also include an ECU. Moreover, since a clutch is built in MT instead of a torque converter, MT also has an enlarged diameter portion 22. Therefore, in this case as well, by fixing the ECU closer to the front of the vehicle than the central portion in the axial direction of the transmission, the enlarged diameter portion 22 can act as a barrier for the ECU.
[0034]
-When a sufficient barrier function against flying stones is obtained by the exhaust pipe or the like, the ECU may be fixed at the center of the transmission in the axial direction or behind it.
[0035]
Similarly, when a sufficient barrier function against flying stones is obtained by the exhaust pipe or the like, the configuration in which the joint portion 25a with the connector 26a of the ECU 25 faces the rear of the vehicle can be omitted. Further, when the influence of flying stones or the like is particularly small, it is possible to adopt a structure in which the blockage of the gaps corresponding to the connectors 29a, 29b, 29c, etc. is omitted.
[0036]
When the vehicle is a front engine / rear drive type four-wheel drive vehicle (FR4WD), a propeller shaft may be employed as the barrier member instead of the exhaust pipe. Even in this case, the ECU 25 can be protected from flying stones by arranging the propeller shaft so as to close the gap between the lower end of the tunnel-shaped portion 16 and the transmission 12.
[0037]
A member that can be adopted as a barrier member that protects the ECU 25 from flying stones is not limited to the exhaust pipe or the propeller shaft. For example, a rear engine mount member, an oil cooler outlet pipe, an exhaust pipe support, a fuel pipe insulator, a brake pipe insulator, a front engine / rear drive (FR) propeller shaft support, and the like can be appropriately employed as the barrier member.
[0038]
-The recessed part which accommodates the transmission 12 is not restricted to a tunnel shape, What is necessary is just to have the form which this transmission was mounted | worn from the lower part and enclosed the upper part and the side of a transmission. For example, the recess may have a gate shape obtained by bending the underbody 15.
[0039]
In addition, the technical idea that can be grasped from the above embodiment and its modifications will be described below.
(1) In the structure for mounting the electronic control device on the transmission according to claim 3, the vehicle is provided with exhaust pipes corresponding to the left and right sides of the transmission, and the exhaust pipe on the left side of the transmission is connected to the base of the transmission. The exhaust pipe on the right side of the transmission is arranged so as to close the gap between the base of the transmission and the lower end on the right side of the tunnel-shaped member. Is arranged.
[0040]
(2) In the structure for mounting the electronic control device on the transmission according to claim 1 or 2, the components of the vehicle that block the gap are a rear engine mount member, an oil cooler outlet pipe, an exhaust pipe support, a fuel pipe insulator, a brake. One of pipe insulator, front engine and rear drive propeller shaft support.
[Brief description of the drawings]
FIG. 1 is a side view showing a schematic side structure of an engine and a transmission portion in an embodiment of a structure for mounting an electronic control device in a transmission according to the present invention.
FIG. 2 is a front view schematically showing a relationship between the vehicle underbody and the transmission according to the embodiment.
FIG. 3 is a perspective view showing a structure of a tunnel-shaped portion formed in a vehicle underbody.
FIG. 4 is a plan view showing a planar structure of a transmission portion according to the embodiment;
FIG. 5 is a side view showing one side structure of the transmission portion of the embodiment.
FIG. 6 is a front view schematically showing a relationship between a vehicle underbody and a transmission in a modification of the embodiment.
FIG. 7 is a side view showing one side structure of a transmission portion according to the modified example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 12 ... Transmission, 15 ... Underbody, 16 ... Tunnel-shaped part, 21 ... Body part, 25 ... ECU as an electronic control unit, 25a ... Joint part, 26 ... Wire harness, 26a ... Connector, 43 ... Exhaust pipe.

Claims (6)

The entire transmission is mounted from below in a recess provided in the under body of the vehicle in a state in which an electronic control device for controlling the vehicle transmission is disposed so as to be exposed on the outer surface of that in the body portion of the transmission, the electronic the gap between the lower falls one side wall of the recess of the control device and the side wall of the transmission is to the transmission, characterized in that setting the arrangement position of the component by the components of the vehicle in busy Garrel so Electronic control device mounting structure. 2. The electronic control device mounting structure for a transmission according to claim 1, wherein the concave portion provided in the underbody is a tunnel-shaped portion formed in a tunnel shape so as to surround an upper side and a side of the transmission. The structure for mounting an electronic control device on a transmission according to claim 1 or 2, wherein the structural member of the vehicle that closes the gap is an exhaust pipe of an engine mounted on the vehicle. The electronic control device mounting structure for a transmission according to claim 1 or 2, wherein the structural member of the vehicle that closes the gap is a propeller shaft that transmits the power of the vehicle to the axle. The electronic control device mounting in the transmission according to any one of claims 1 to 4, wherein a joint portion between the electronic control device and a connector of a wire harness connected to the electronic control device is directed to the rear of the vehicle. Construction. The structure for mounting an electronic control device on a transmission according to any one of claims 1 to 5, wherein the electronic control device is fixed to the front side of the vehicle from a central portion in the axial direction of the transmission.

Images