JP5731430B2 - Engine control device - Google Patents

Description

  The present invention relates to the technology of an engine control device, and more particularly to the technology of an engine control device attached to the outside of an engine.

  Conventionally, an electronically controlled engine that controls the operating state of an engine by controlling the fuel injection amount, injection timing, injection pressure, and the like by an engine control unit (hereinafter referred to as an ECU) as an engine control device. Is widely known. Further, the ECU is stored in the ECU case, and it is known that the ECU case is attached to the outside of the engine such as the surface of the engine or each member in the engine room in order to shorten the wiring (for example, Patent Document 1).

JP 2011-256813 A

  As shown in FIG. 12, the conventional ECU case is composed of a hook-shaped outer member 281 having a convex outer side and a plate-shaped inner member 282 provided on the inner side. A connector hole 281a for projecting the connection connector 271 outward is provided. The connector 271 is fixed to the outer member 281 with a screw or the like. After the board 270 is stored in the outer member 281 and the inner member 282 is fitted to the outer member 281, the base portion of the connector 271 is soldered to the board 270. Is done. However, in such a configuration, even if a problem occurs in the board 270, the connector 271 is fixed to the outer member 281, so that the soldering between the connector 271 and the board 270 is not removed. The substrate 270 could not be taken out from the outer member, and it was difficult to perform maintenance. On the other hand, when the connector 271 is fixed to the substrate 270, water droplets or the like may enter from between the periphery of the connector 270 and the outer member 281.

  Therefore, in view of the problem, the present invention can be attached to the outside of the engine, can be easily maintained even if there is a faulty part on the connector or the board, and water drops enter the engine control device. Provided is an engine control device capable of preventing

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

The engine control device is housed in a case attached to the outside of the engine, and includes a board and a connector for wiring connection, and the case is a plate-like outer member provided outside. And a hook-shaped inner member provided on the inner side, the outer member is provided with a connector hole for projecting the connector outward, an adapter is provided at the base of the connector, A groove for applying a sealant is provided on the outermost surface, and the distance between the groove and the peripheral edge of the connector hole of the outer member is shorter than the distance between the groove and the outermost peripheral edge of the adapter. those configured such that.

According to a second aspect of the present invention, a partition wall is provided between the groove of the adapter and the connector.

  As effects of the present invention, the following effects can be obtained.

  According to the first aspect, it is possible to prevent water droplets from entering the case from between the outer member and the adapter.

  In addition, when removing the outer member from the inner member, it is possible to easily remove the sealant without removing the sealant by simply removing the sealant, so that maintenance can be easily performed. Further, by applying the sealant along the groove, the sealant is less likely to sag around the work.

  Moreover, although the sealing agent protrudes from the peripheral edge portion of the connector hole of the outer member, it can be visually confirmed that the sealing agent is applied as a whole. Moreover, since the distance to the outermost surface peripheral edge part of an adapter is long, a sealing agent becomes difficult to drip inside.

In Claim 2 , it can prevent that a sealing agent protrudes to the connector side.

The right view which shows the engine with which the engine control apparatus concerning one Embodiment of this invention was attached. Similarly left side view. FIG. The perspective view which shows an engine control apparatus. The perspective view which shows the positional relationship of an inner member, a board | substrate, an adapter, a connector, and an outer member. The top view which shows an engine control apparatus. AA line sectional view of Drawing 6. The top view which shows an inner member, a board | substrate, an adapter, and a connector. The top view which shows an inner member. The BB sectional drawing of FIG. 8 which shows the state which molded the inner member and the board | substrate. The expanded sectional view which shows the circle C part of FIG. Sectional drawing which shows the conventional engine control apparatus.

  Next, embodiments of the invention will be described.

  First, an engine 1 to which an ECU (Engine Control Unit) 60 as an engine control apparatus according to an embodiment of the present invention is attached will be described with reference to FIGS. 1 to 3. Here, in FIG. 1, the arrow direction is the forward direction. Further, the vertical direction of the paper surface is the vertical direction. In the present embodiment, a multi-cylinder diesel engine is shown, but the present invention is not limited to this.

  As shown in FIGS. 1 to 3, the engine 1 includes a cylinder block 2, a cylinder head 3, an oil pan 4, a flywheel 6, an intake manifold 20, and an exhaust manifold 30.

  The main body of the engine 1 includes an upper cylinder block 2 and a cylinder head 3 and a lower oil pan 4. In the cylinder block 2, a cylinder (not shown) is formed in the center in the vertical direction, a piston is accommodated in the cylinder, and a lower part is used as a crankcase. An intake port and an exhaust port (not shown) formed in the cylinder head 3 are communicated with and disconnected from the cylinder of the cylinder block 2 by the intake valve and the exhaust valve.

  The flywheel 6 is a rotating body that is pivotally supported by a crankshaft (not shown) and transmits the rotational energy of the crankshaft to a load using an inertial force. Since the explosion force of the engine 1 is generated in each cylinder in order, the force transmitted to the crankshaft can be uneven. Therefore, the rotation of the crankshaft is smoothed by the inertial force of the heavy iron flywheel 6.

  The intake port is opened on the upper surface of the main body of the engine 1. The intake manifold 20 is attached to the upper surface of the cylinder head 3 and communicates with the intake port. As shown in FIG. 3, a supercharger 40 is provided on the left side of the main body of the engine 1. The supercharger 40 includes a turbine communicated with the exhaust manifold 30 and a compressor that rotates in conjunction with the turbine. The supercharger 40 compresses intake air and supplies it to the intake manifold 20.

  The exhaust port is open on the left side of the main body of the engine 1. The exhaust manifold 30 is attached to the left side surface of the cylinder head 3 and communicates with the exhaust port.

  A diesel particulate filter (DPF) 50 is provided above the flywheel 6. The DPF 50 is a device for collecting particulate matter (PM) and the like in the exhaust gas, and is provided on the downstream side of the exhaust system. An ECU (Engine Control Unit) 60 as an engine control device is stored in an ECU case 61 on the upper surface of the DPF 50.

  The ECU 60 is a CPU that executes various arithmetic processes and controls, a ROM that stores various data fixedly in advance, an EEPROM that stores a control program and various data in a rewritable manner, and temporarily stores a control program and various data. RAM, a timer for time measurement, an input / output interface, and the like. Various components of the engine 1 are connected by a harness (not shown). By providing on the upper surface of the engine 1, the length of the harness can be shortened.

  Next, the ECU 60 and the ECU case 61 will be described with reference to FIGS. The ECU 60 includes a substrate 70 and a connector 71 for wiring connection. The board 70 is a plate-like printed board and is fixed to the ECU case 61. A plurality of electronic components 75 are mounted on the substrate 70. The board 70 is provided with screw holes 70a. The screw holes 70a are arranged so as not to disturb the arrangement of the electronic component 75 and the connector 71. In the present embodiment, the straight lines parallel to the long sides of the board 70 and a plurality of straight lines provided at equal intervals and the board are arranged. It is arranged on the apex of a lattice formed by a plurality of straight lines that are parallel to the short side of 70 and provided at equal intervals. However, the screw hole 70 a is not provided at the position where the connector 71 is mounted on the substrate 70. The electronic component 75 includes an atmospheric pressure sensor 76 (see FIG. 8) for detecting the atmospheric pressure outside the engine 1, a capacitor, and the like.

  In the present embodiment, two connectors 71 for wiring connection are provided. The connector 71 has a plurality of pin portions 71a protruding inward of the engine 1, and the pin portions 71a are inserted into the board 70 and fixed so as to be energized. An adapter 77 is provided at the bottom of the connector 71 and the base including the pin portion 71a.

  The adapter 77 is a trapezoidal member for fixing the connector 71 and is formed to have a substantially rectangular shape when viewed from the outside of the engine 1. The adapter 77 has four legs 77a, and the legs 77a are provided with screw holes 77b into which screws for attaching to the substrate 70 are inserted. Two connectors 71 and 71 are fitted to the adapter 77, and when the adapter 77 is fixed to the board 70, the connectors 71 and 71 and the board 70 are fixed via the adapter 77. Become.

  The ECU case 61 includes a plate-shaped outer member 81 provided on the outer side, and a bowl-shaped inner member 82 that is convex on the inner side provided on the inner side. Here, the outer side is the outer side when the ECU case 61 is attached to the engine 1 (the side not in contact with the engine 1), and the inner side is the inner side when the ECU case 61 is attached to the engine 1 (with the engine 1). The side that touches).

  As shown in FIG. 5, the outer member 81 is a metal plate-like member, is formed in a substantially rectangular shape, and the corners are rounded. Further, a flange portion 81a for screwing together with a peripheral boss portion 82c of the inner member 82 described later is provided on the peripheral portion of the outer member 81. Further, the outer member 81 is provided with a connector hole 81b for causing the connectors 71 and 71 to protrude outward. The connector hole 81b is formed in a substantially square shape, and the corners are rounded. The size of the connector hole 81b may be any size that allows the connectors 71 and 71 to protrude. In the present embodiment, the connector hole 81b is formed to have a size that allows the two connectors 71 and 71 to protrude. Yes. The connector hole 81b is arranged in accordance with the positions of the connectors 71 and 71 on the board 70. In the present embodiment, as shown in FIG. Is provided.

  As shown in FIG. 5, the inner member 82 is a bowl-shaped member whose inner side is made of metal, and is a surface facing the surface of the engine 1 when the ECU case 61 is attached to the engine 1. The mounting surface 82a has a side surface 82b protruding from the periphery of the mounting surface 82a in the direction opposite to the mounting side (outward direction of the engine 1). A peripheral boss portion 82c for screwing together with the flange portion 81a of the outer member 81 is provided on the side surface 82b.

  The attachment surface 82a of the inner member 82 is formed to have a substantially square shape when viewed from the outside of the engine 1, and the substrate 70 is fixed to the attachment surface 82a. As shown in FIG. 7, the attachment surface 82 a is configured such that the distance from the substrate 70 is a distance that does not contact the electronic component 75 disposed on the substrate 70. Specifically, the distance between the connector 71 and the electronic component 75 projecting from the inner surface of the engine 70 of the board 70 is such that it does not come into contact with the most projecting component. In this embodiment, as shown in FIG. 7, it is comprised so that it may become the distance of the grade which does not contact with the pin parts 71a * 71a of the connectors 71 * 71.

  As shown in FIGS. 8 and 9, the mounting surface 82 a is formed so as to have a substantially square shape when viewed from the outside of the engine 1, and flange portions 82 d that protrude inward in the engine 1 on two opposite sides. -82d is provided. The flange portions 82d and 82d are provided with screw holes 82e into which screws for fixing to the engine 1 are inserted, and the inner member 82 is fixed to the surface of the engine 1 with the screws. Since the flange portions 82d and 82d protrude inward, when the inner member 82 is fixed to the surface of the engine 1, a gap is formed between the surface of the engine 1 and the mounting surface 82a of the inner member 82.

  As shown in FIG. 9, a plurality of boss portions 85 for inserting screws are provided on the mounting surface 82a. The boss portion 85 is provided around a screw hole 85a for inserting a screw for fixing the substrate 70, and protrudes in a direction opposite to the attachment side from other portions of the attachment surface 82a. Further, as shown in FIGS. 5, 7, and 9, the boss portion 85 protrudes further toward the inside of the engine 1 than the other portion of the mounting surface 82a, and its end portion is rounded. By configuring in this way, even if the screw is a long screw whose tip penetrates the mounting surface 82a when inserted, the screw hole 85a is lengthened by increasing the length of the boss portion 85 in the engine 1 inside direction. Can be inserted into the screw hole 85a.

  The boss portion 85 is provided corresponding to the screw hole 70 a provided in the substrate 70. Since the screw hole 70a of the substrate 70 is preferably provided at a position as far as possible from the electronic component 75 mounted on the substrate 70, the place where the screw hole 70a is provided is limited. In the present embodiment, the screw holes 70a are formed by a plurality of straight lines provided at equal intervals in a straight line parallel to the long side of the substrate 70 and a plurality of straight lines provided at equal intervals in parallel to the short side of the substrate 70. The boss portion 85 is also provided on the vertex of the lattice. However, the boss portion 85 is not provided at the position where the connector 71 is mounted on the substrate 70.

  A bridge portion 86 is provided between the adjacent boss portion 85 and the boss portion 85. As shown in FIG. 9, the bridge portion 86 is disposed so as not to interfere with the electronic component 75 mounted on the substrate 70. In the present embodiment, the bridge portion 86 is provided along a straight line parallel to the long side of the substrate 70 and a straight line parallel to the short side of the substrate 70 constituting the lattice. However, the bridge portion 86 is not provided at the position where the connector 71 is mounted on the substrate 70. Further, the midway part of the bridge part is cut away in order to allow air to escape and allow the molding agent to pass through.

  As shown in FIG. 9, a resin inflow hole 86 a into which a molding agent 91 (refer to FIG. 10) made of resin for molding is formed by cutting out a part of the bridge portion 86 is formed. The resin inflow hole 86 a is formed by cutting out a part of the bridge portion 86 provided along the inner periphery of the side surface of the inner member 82. Further, as shown in FIG. 9, when the bridge portion 86 is partly cut and molded, an air discharge hole 86b for discharging air pushed out by the resin is formed. The air discharge hole 86b is formed by cutting out a part of the remaining bridge portion 86 in which the resin inflow hole 86a is not formed among the bridge portions 86 provided along the inner periphery of the side surface of the inner member 82. . Since air has higher fluidity than the molding agent 91, the air discharge hole 86b is formed to be narrower than the resin inflow hole 86a.

  As shown in FIGS. 8 and 9, a ventilation hole 89 for supplying air outside the engine 1 to the atmospheric pressure sensor 76 is provided in the mounting surface 82 a of the inner member 82. As shown in FIGS. 8 and 9, the ventilation hole 89 is provided in one of the apexes of a quadrangle when the attachment surface 82 a is viewed from the outside of the engine 1, and is formed in a circular shape. Further, the vent 89 is provided with a membrane member 89a (see FIG. 5) that allows air to pass therethrough and prevents water from passing. The membrane member 89 a is formed by stretching a membrane on the bottom surface of a cylindrical member, and is fitted in the vent hole 89. The film is made of a porous resin and covers the vent hole 89.

  A partition wall 90 is provided that protrudes from the mounting surface 82a of the inner member 82 in the direction opposite to the mounting side and separates the space in which the substrate 70 is disposed and the space in which the vent hole 89 is disposed. In the present embodiment, the partition wall 90 is provided so as to surround the vent hole 89. The height of the partition wall 90 protruding in the direction opposite to the attachment side is formed to be higher than the height of the electronic component 75 arranged on the substrate 70 that protrudes most in the direction opposite to the attachment side. . Further, the air passes outside the engine 1 rather than the partition wall 90 and flows into the inner member 82.

  Next, the arrangement of the outer member 81, the connector 71, the adapter 77, the board 70, and the inner member 82 will be described with reference to FIGS. As shown in FIG. 3, the inner member 82 is attached to the surface of the engine 1 via flange portions 82 d and 82 d. The two connectors 71 and 71 are fitted and fixed to the adapter 77, and are fixed to the board 70 through the adapter 77 so as to be energized. In other words, the board 70 to which the connectors 71 and 71 and the adapter 77 are fixed becomes one unit. The board 70 to which the connectors 71 and 71 and the adapter 77 are fixed is fixed to the mounting surface 82a of the inner member 82 by inserting a screw into a screw hole provided in the board 70 and a boss portion 85 of the inner member. By unitizing the connector 71, the adapter 77, and the substrate 70, it is possible to inspect whether the connector 71, the adapter 77, or the substrate 70 is defective before attaching the substrate 70 to the inner member 82.

  The outer member 81 is fixed to the inner member 82 by inserting screws into the flange portion 81 a of the outer member 81 and the peripheral boss portion 82 c of the inner member 82. By comprising in this way, the outer member 81 can be easily removed from the inner member 82 by removing the screw inserted in the outer member 81 and the inner member 82.

  Next, the mold in the ECU case 61 will be described. Here, molding means that the periphery of the substrate 70 is hardened with resin. In a state where the connectors 71 and 71, the adapter 77, and the substrate 70 are stored and fixed inside the inner member 82 of the ECU case 61, a molding agent 91 made of a liquid resin is poured into the inner member 82 to be solidified. To do.

  As shown in FIG. 10, when pouring liquid resin, the inner member 82 is tilted. Specifically, the direction in which the inner member 82 is tilted is such that, among the electronic components 75 mounted on the board 70, the higher one protruding in the direction opposite to the mounting side is higher. In the present embodiment, the atmospheric pressure sensor 76 is configured such that the height protruding in the direction opposite to the attachment side is lower than the other electronic components 75. Therefore, the atmospheric pressure sensor 76 is disposed at a position away from other electronic components 75. Specifically, the other electronic component 75 is disposed on one side of the apparatus and the atmospheric pressure sensor 76 is disposed on the other side. In addition, as shown in FIG. 10, the electronic component 75 is arranged such that a component protruding in a direction opposite to the attachment side and having a high height is close to the side surface 82 b of the inner member 82. Thereby, as the pressure sensor 76 is arranged so that the height protruding in the direction opposite to the mounting side of the electronic component to be arranged becomes higher from the side where the pressure sensor 76 is arranged to the other side, the arrangement of the pressure sensor 76 is increased. Tilted so that the raised side is higher.

  By configuring in this manner, the inside member 82 can be molded without the atmospheric pressure sensor 76 being buried in the molding agent 91. Further, the height of the partition wall 90 protruding in the direction opposite to the mounting side is formed to be higher than the height of the electronic component 75 arranged on the substrate 70 that protrudes most in the direction opposite to the mounting side. Therefore, it is possible to mold only in the space in which the substrate 70 is arranged except for the space in which the vent hole 89 is arranged.

  Further, as shown in FIGS. 7 and 11, a sealant 95 is provided between the outermost surface of the adapter 77 and the outer member 81. The sealant 95 is made of resin, for example, and is a member that prevents water droplets or the like from entering between the adapter 77 and the outer member 81. As shown in FIG. 11, a groove 77 c for applying a sealant 95 is provided on the outermost surface of the adapter 77. The groove 77 c is a semicircular groove in cross section, and is provided along the outermost surface of the adapter 77. The groove 77c is provided at a position covered by the outer member 81 when viewed from the outside of the engine 1.

  Also, as shown in FIG. 11, the distance d1 between the groove 77c and the peripheral edge of the connector hole 81b of the outer member 81 is shorter than the distance d2 between the groove 77c and the outermost peripheral edge of the adapter 77. It is configured. When the sealant 95 is applied to the groove 77c and the outer member 81 is put on the outside of the adapter 77, the sealant 95 is sandwiched between the outermost surface of the adapter 77 and the inner surface of the outer member 81 and protrudes from the groove 77c. The sealant 95 is spread between the outermost surface of the adapter 77 and the inner surface of the outer member. Of the sealant 95, the seal agent 95 that has been pushed to the peripheral side of the connector hole 81b can be viewed through the connector hole 81b. Further, among the sealant 95, the sealant 95 that has been spread to the peripheral edge of the outermost surface of the adapter 77 remains on the outermost surface, and therefore does not hang down into the inner member 82.

  A partition wall 77d is provided between the groove 77c and the connector 71. Of the sealant 95 that protrudes from the groove 77c, the sealant 95 that is pushed and expanded toward the peripheral edge of the connector hole 81b remains without drooping to the connector 71 side by the partition wall 77d. Thereby, the sealing agent 95 does not hang down to the connector 71.

  In addition, although ECU60 concerning one Embodiment of this invention is arrange | positioned at the upper surface of DPF50, it is not limited to this, For example, you may arrange | position at the side surface of the engine 1. FIG. Moreover, if it is the exterior of the engine 1, it will not be limited to the surface of the engine 1, For example, you may attach to each member in an engine room.

  Moreover, in ECU60 which concerns on one Embodiment of this invention, although the boss | hub part 85 is provided on the vertex of the grating | lattice, it is not limited to this, For example, along the edge of the side surface inner periphery of the inner member 82 It is also possible to provide a plurality of boss portions 85.

  Further, in the ECU 60 according to the embodiment of the present invention, the bridge portion 86 is provided along the sides of the lattice, but the present invention is not limited to this. For example, the bridge portion 86 is provided along the inner periphery of the side surface of the inner member 82. It is also possible to provide a part.

  In the ECU 60 according to the embodiment of the present invention, the groove 77c is provided on the outermost surface of the adapter 77. However, the present invention is not limited to this. For example, a groove may be provided on the inner surface of the outer member 81. Is possible.

  As described above, the ECU 60 is the ECU 60 stored in the ECU case 61 attached to the outside of the engine 1, and includes the substrate 70 and the connector 71 for wiring connection. The ECU case 61 is provided outside. A plate-like outer member 81 and a hook-like inner member 82 which is convex on the inner side, and the outer member 81 has a connector hole 81b for projecting the connector 71 outward. , An adapter 77 is provided at the base of the connector 71, and a groove 77 c for applying the sealant 95 is provided on the outermost surface of the adapter 77. With this configuration, it is possible to prevent water droplets from entering the ECU case 61 from between the outer member 81 and the adapter 77. Also, when removing the outer member 81 from the inner member 82, it is possible to easily remove the sealant 95 without moving the connector 71, so that maintenance can be easily performed. Further, by applying the sealing agent 95 along the groove 77c, the sealing agent 95 is less likely to sag around the work.

  Further, the distance between the groove 77c and the peripheral edge of the connector hole 81b of the outer member 81 is configured to be shorter than the distance between the groove 77c and the outermost peripheral edge of the adapter 77. By comprising in this way, since the sealing agent 95 protrudes from the peripheral part of the connector hole 81b of the outer side member 81, it can confirm visually that the sealing agent 95 is apply | coated entirely. Moreover, since the distance to the outermost surface peripheral edge part of the adapter 77 is long, the sealing agent 95 becomes difficult to drip inside.

  Further, a partition wall 77d is provided between the groove 77c of the adapter 77 and the connector 71. By comprising in this way, it can prevent that the sealing agent 95 protrudes to the connector 71 side.

1 engine 60 ECU (engine control device)
61 ECU case (case)
70 Substrate 71 Connector 77 Adapter 77c Groove 77d Partition 81 Outer member 82 Inner member 95 Sealant

Claims (2)

An engine control device stored in a case attached to the outside of the engine,
A board and a connector for wiring connection,
The case includes a plate-like outer member provided on the outer side, and a hook-like inner member provided on the inner side,
The outer member is provided with a connector hole for projecting the connector outward, and an adapter is provided at the base of the connector,
Provide a groove for applying a sealant on the outermost surface of the adapter ,
An engine control device characterized in that a distance between the groove and a peripheral edge portion of the connector hole of the outer member is shorter than a distance between the groove and an outermost surface peripheral edge portion of the adapter . The engine control device according to claim 1 , wherein a partition wall is provided between a groove of the adapter and the connector .

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