JP2010090879A - Mounting structure of engine controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce mounting man-hours and curb costs by decreasing a length of a harness coupled between an ECU and an engine, and to maintain functions by avoiding rise in the temperature of the ECU. <P>SOLUTION: An engine controller 30 for carrying out operation control of an engine 38 is arranged in a space s1 below a floor of a vehicle 10 and at the back of a lateral side in a width direction of a bumper 12 and further surrounded with a front side wall 62 of a tire house 58 of a front wheel and with a front side panel 56 which covers a portion ranging from an outer side part at a width direction of the front side wall in the tire house 58 of the front wheel to a front end of the vehicle 10. An air flow b is formed at a periphery of the engine controller by the travelling of the vehicle 10. Preferably, lamps 14, 16 are mounted on the lateral side in the width direction of the bumper 12, and in the travelling of the vehicle, the air flow b is introduced into an inside of a vehicle body from openings 18 provided at periphery of the lamps 14, 16, thereby forming the air flow in the periphery of the engine controller 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention prevents the engine control device from being heated and reduces the required length of the harnesses by placing the engine control device below the vehicle floor and behind the bumper in the vehicle width direction. It is related with the mounting structure of the engine control apparatus which enabled shortening.

  Conventionally, an engine control device (hereinafter referred to as “ECU”) mounted on a vehicle, for example, in a large bus, has little heat generated by the ECU and is not affected by the temperature around the mounting portion. As shown in FIGS. 7 and 8, they are arranged around the feet of the driver's seat in the driver's cab. 7 and 8, a clutch pedal 101, a brake pedal 102, and an accelerator pedal 103 are provided below the handle 100, and the ECU 104 is disposed in the vicinity of the clutch pedal 101.

Patent Document 1 (Japanese Utility Model Publication No. 62-71347) discloses a configuration in which an ECU is joined to an inner surface of a bonnet in an engine room.
Patent Document 2 (Japanese Utility Model Laid-Open No. 7-24663) discloses that a computer box storage device for a bus effectively uses a dead space existing behind a vertical baggage panel in a baggage room to store a computer box therein. The configuration described above is disclosed.

Japanese Utility Model Publication No. 62-71347 Japanese Utility Model Publication No. 7-24663

  In recent years, the amount of heat generated by the ECU itself has increased in order to comply with exhaust gas regulations or to improve engine output and controllability. Therefore, the influence of the ambient temperature is greatly affected. When the ambient temperature exceeds about 45 ° C., it is necessary to cool the ECU in order to maintain the function of the ECU. However, since the vehicle interior reaches as high as 60 ° C. under the summer sun, it has become inconvenient to install the ECU in the vehicle interior.

  Further, when the ECU is disposed in the driver's seat, as shown in FIG. 9, the distance between the ECU 104 and the engine 105 is too large, and both are arranged above and below the floor 106 with the floor 106 interposed therebetween. In addition, the number of the joints 107 is increased and the length of the harness 108 is increased, such as requiring the intermediate harness 108a. Therefore, there is a risk that the electrical resistance of the harness 108 increases and the reliability of the ECU decreases.

As disclosed in Patent Document 1, when the ECU is joined to the inner surface of the bonnet in the engine room, the engine room becomes hot when the engine is operating, which may reduce the function of the ECU. Even at times, the outer surface of the bonnet is heated by sunlight, and the air in the bonnet stays. Therefore, the surroundings of the ECU become hot due to heat generation of the ECU itself. Therefore, it is inconvenient as an installation place of the ECU.

  Further, as disclosed in Patent Document 2, when the ECU is arranged in a dead space existing behind the vertical baggage panel in the baggage room instead of the computer box storage device, as in the case of Patent Document 1, Since the air in the room stays, the temperature around the ECU becomes high due to the heat generated by the ECU itself.

  In view of the problems of the prior art, the present invention suppresses the temperature rise of the ECU and maintains its function, shortens the length of harnesses connected between the ECU and the engine, and reduces the number of mounting steps. The objective is to realize cost savings.

In order to solve the above problems, the mounting structure of the engine control device of the present invention is:
A front side that is below the floor of the vehicle and behind the side in the vehicle width direction of the bumper, and covers the front side wall of the front wheel tire house and the front side wall of the front wheel tire house from the vehicle width direction outer side to the front end of the vehicle An engine control device for controlling the operation of the engine is disposed in a space surrounded by the panel, and an air flow is formed around the engine control device by traveling of the vehicle.

  In the present invention, since the ECU is arranged in a space communicating with the outside below the floor portion, the ambient temperature does not rise due to sunlight, and an air flow is generated when the vehicle travels, thereby cooling the ECU. The reliability of the ECU can be maintained.

  Further, since the ECU is installed in the space below the floor, it is possible to eliminate a portion where the engine harness connecting the engine and the ECU penetrates the floor. For this reason, it is not necessary to take measures against water intrusion from the through portion into the vehicle interior, and it is possible to eliminate the harness routing work from outside the vehicle interior to the vehicle interior, thereby reducing the number of installation steps. In addition, the harness length can be reduced, and the number of connecting connectors can be reduced.

  Further, since the ECU is arranged in a space surrounded by the surroundings, it is possible to prevent the ECU from being flooded by rain water or splashes from front wheel tires. Furthermore, electrical resistance can be reduced by reducing the length of the harness, noise due to electromagnetic waves from other electrical devices is reduced, and connection failure of connected connectors is reduced by reducing the number of connected connectors. Reliability is improved.

In the present invention, lamps are mounted on the side of the bumper in the vehicle width direction, and an air flow is introduced into the vehicle body from an opening provided around the lamps when the vehicle is running, and the air flow is generated around the engine control device. It is good to comprise so that it may form.
A headlamp or the like is mounted on the side of the bumper in the vehicle width direction and is complicated. In addition, an opening is provided for adjusting the aiming of the headlamp, replacing the light bulb, or hooking the tow hook on the tow hook. When the vehicle travels, air is introduced into the space where the ECU is disposed from the opening, and an air flow is formed around the ECU, so that the ECU can be effectively cooled by the air flow.

  When traveling in the rain, rainwater is received by lamps and the like and falls downward, but the traveling wind flows into the space, and the ECU can be effectively cooled.

In the present invention, the ECU may be attached to the chassis frame via the stay, and the engine control device may be disposed above the chassis frame and the top portion may be disposed near the floor.
Thereby, since the ECU can be installed at a high place away from the road surface in the space, it is possible to prevent flooding of the ECU when traveling in shallow water.

  Further, in the present invention, it is preferable that the air flow flowing from the front of the vehicle body flows around the ECU, and then flows backward through a space formed between the chassis frame and the side wall of the front wheel tire house. In this way, by forming the space behind the ECU, the air flow that flows in from the opening provided in the bumper easily flows backward, and the air flow that passes through the ECU is easily formed. Therefore, since the air flow can be formed around the ECU even when the vehicle is stopped, the ECU can be cooled more effectively.

  According to the mounting structure of the ECU of the present invention, the front side wall of the front wheel tire house and the outer side in the vehicle width direction of the front side wall of the front wheel tire house are below the vehicle floor and behind the side portion of the bumper in the vehicle width direction. An engine control device that controls the operation of the engine is disposed in a space surrounded by a front side panel that covers from the front to the front end of the vehicle, and an air flow is formed around the engine control device by running the vehicle. By doing so, the ECU is arranged in the space below the floor, so that the ambient temperature of the ECU does not rise due to sunlight and the ECU is cooled by the traveling wind, so that the function of the ECU is improved. Can be maintained.

In addition, among the harnesses connected between the ECU and the engine, the harnesses penetrating the floor can be reduced, the connecting connectors can be reduced, and the harness length can be shortened.
Therefore, the contact failure of the connector is reduced, the electrical resistance of the harness can be reduced, and noise between the engine and the ECU is reduced, so that the reliability of the ECU is improved.
Moreover, since the number of harnesses penetrating the floor can be reduced, the risk of water intrusion into the passenger compartment can be reduced, and the number of harness mounting steps can be reduced.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified.

  An embodiment in which the present invention is applied to a large vehicle such as a bus will be described with reference to FIGS. 1 to 5 show a vehicle body front portion such as a bus and the left side portion in the vehicle width direction (in the direction of arrow d in the figure) below the floor portion. Among these, FIG. 1 is the perspective view which removed the front-wheel tire house and was seen from diagonally back. FIG. 4 shows a state where devices such as the radiator grille 42, the headlamp, and the fog lamp mounted on the bumper 12 are removed. FIG. 5 shows a state in which a front wheel tire house such as a front wheel tire and a mudguard is removed as viewed from the rear of the vehicle (in the direction of arrow e in the figure).

  1 to 5, a bumper 12 is provided at a lower portion of the front portion of the vehicle 10, and a fog lamp 16 is mounted on the bumper 12 below the headlamp 14 and the headlamp 14. A multipurpose opening 18 is provided on the right side of the fog lamp 16 when viewed from the rear side of the vehicle body. The vehicle 10 travels forward (in the direction of arrow a).

The vehicle 10 is provided with a pair of chassis frames 20 spaced apart from each other in the vehicle longitudinal direction. A traction hook 24 is fixed to the outer side surface 20 a of the left chassis frame 20 in the vehicle front-rear direction via a support member 22. The tow hook 24 is disposed at a position facing the opening 18 when viewed from the front of the vehicle on the inner side of the opening 18 in the vehicle body.
The opening 18 is provided for the purpose of adjusting the aiming of the headlamp 14, replacing the bulbs of the headlamp 14 and the fog lamp 16, or inserting a tow rope connected to the tow hook 24.

The vehicle 10 is provided with a floor portion 26 that vertically divides a cab and a chassis portion below the cab in the vehicle front-rear direction. The floor portion 26 is supported by a floor frame 28 having a rectangular cross section and disposed in the vehicle front-rear direction.
A pair of brackets 34 a and 34 b are fixed to the outer surface 20 a of the chassis frame 20 in parallel by bolts 36 upward (in the direction of arrow c in the figure). A rectangular attachment plate 32 is attached to the brackets 34a and 34b so as to be inclined slightly from the vertical direction, and the ECU 30 is mounted and fixed on the attachment plate 32. The height of the ECU 32 is disposed above the chassis frame 20, and the top portion of the ECU 32 is located near the lower surface of the floor portion 26.

As shown in FIG. 3, an engine 38 is disposed behind the ECU 30 and below the floor portion 26, and the ECU 30 includes other devices such as the engine 38 and a side winker lamp 39 attached to the front side panel 56. The harnesses 40 connected to each other are connected.
A radiator grille 42 is disposed at the center of the bumper 12 in the vehicle width direction, and a radiator 44 is disposed behind the radiator grille 42. A shroud 46 for guiding cooling air to the radiator 44 is disposed behind the radiator 44, and a fan 48 is disposed inside the outlet of the shroud 46.
Cooling water ducts 50 and 52 for circulating cooling water are connected between the engine 38 and the radiator 44, and an exhaust duct 54 is connected to the engine 38.

  As shown in FIG. 3, a front side panel 56 is connected from the outer end of the bumper 12 in the front-rear direction of the vehicle toward the rear of the vehicle, and a front wheel tire house 58 is provided on the front side panel 56. The front wheel tire house 58 includes a front mud guard 62 and a rear mud guard 64 disposed so as to sandwich the front wheel tire 60, and is made of rubber or resin, and is a splash shield disposed inside the front wheel tire 60 in the vehicle longitudinal direction. 66. The splash shield 66 is disposed at a height between the chassis frame 20 and the floor portion 26 (see FIG. 2).

In this embodiment having such a configuration, when the vehicle 10 travels forward (in the direction of arrow a), air flows from the opening 18 into the space s1 in the vehicle, and an air flow b is formed. As shown in FIG. 2, the air flow b flowing into the vehicle through the opening 18 is blocked by the front mud guard 62 due to the presence of the front mud guard 62, and forms a flow that bypasses the upper side of the front mud guard 62.
Then, it passes around the ECU 30 disposed behind the opening 18 and flows into a space s2 formed between the chassis frame 20 and the splash shield 66 as shown in FIG. 3, and then descends downward to the outside of the vehicle. Get out.

According to the present embodiment, in the space s <b> 1 below the floor portion 26 and behind the side portion in the vehicle width direction of the bumper 12 and surrounded by the front mud guard 62 of the front wheel tire house 58 and the front side panel 56. By arranging the ECU 30, the space s 1 is not heated by sunlight as in the cab, and when the vehicle 10 travels, an air flow b is formed around the ECU 30 due to traveling wind introduced from the opening 18. Is done.
Therefore, since the ECU 30 can be effectively cooled by the air flow b, the function of the ECU 30 can be maintained.

Even when the vehicle is stopped, the space s1 is not heated by sunlight like the driver's cab and communicates with the outside of the vehicle body, so that the amount of heat emitted from the ECU can be dissipated. Therefore, the temperature rise of the ECU can be suppressed and its function can be maintained.
Further, since the space s2 is formed between the chassis frame 20 and the splash shield 66 behind the ECU 30, the air flow b flowing from the opening 18 easily flows backward. Therefore, the air flow b can be formed around the ECU 30 even when the vehicle is stopped, and the ECU 30 can be cooled.

  Further, since the ECU 30 is installed in the space s1 below the floor portion, the portion of the engine harness 40 that connects the engine 38 and the ECU 30 that penetrates the floor portion 26 can be eliminated. For this reason, it is not necessary to take measures against water intrusion from the through portion into the vehicle interior, and it is possible to eliminate the harness routing work from outside the vehicle interior to the vehicle interior, thereby reducing the number of installation steps. In addition, the harness length can be reduced, and the number of connecting connectors can be reduced.

  Moreover, since ECU30 is arrange | positioned in the space s1 where the circumference | surroundings were enclosed, the flood damage of ECU can be prevented from the raindrop or the splash by a front-wheel tire. Furthermore, electrical resistance can be reduced by reducing the length of the harness, noise due to electromagnetic waves from other electrical devices is reduced, and connection failure of connected connectors is reduced by reducing the number of connected connectors. Reliability is improved.

  FIG. 6 shows the arrangement of the harness in this embodiment. As shown in FIG. 6, the harnesses 40 that connect the ECU 30 and the engine 38 can be shortened, and the through portion of the floor portion 26 can be eliminated. Therefore, the number of joint portions 68 can be reduced compared to the conventional harness arrangement situation shown in FIG.

Further, according to the present embodiment, during rainy weather, rainwater is received by the lamps and the like and falls downward, but the traveling wind b flows into the space s1 to effectively cool the ECU 30. it can.
Further, the ECU 30 is attached to the chassis frame 20 via the brackets 34a and 34b, and the ECU 30 is disposed above the chassis frame 20 and the top thereof is disposed in the vicinity of the lower surface of the floor 26, so when traveling in shallow water, The water damage of the ECU 30 can be prevented.

  According to the present invention, it is possible to effectively suppress an increase in temperature of an ECU mounted on a vehicle such as a bus, maintain its function, reduce the length of harnesses connected to the ECU and the engine, and reduce the cost. Savings can be realized.

It is a perspective view of the lower part of the vehicle front part concerning one embodiment of the present invention. It is a side view of the lower side part of the vehicle front part which concerns on the said embodiment. It is a top view of the downward side part of the vehicle front part which concerns on the said embodiment. It is a front view of the lower part of the vehicle front part concerning the embodiment. It is a rear view of the downward side part of the vehicle front part which concerns on the said embodiment. It is a layout view of harnesses according to the embodiment. It is a perspective view of a bus front part. FIG. 8 is a schematic diagram of the interior of a bus vehicle viewed from the direction A in FIG. 7. It is a layout view of harnesses of a conventional bus body.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vehicle 12 Bumper 14 Head lamp 16 Fog lamp 18 Opening 20 Chassis frame 26 Floor part 30 ECU (engine control apparatus)
32 Mounting plate 34a-b Bracket (stay)
38 Engine 40 Harnesses 56 Front side panel 58 Front wheel tire house 60 Front wheel tire 62 Front mud guard 66 Splash shield b Air flow s1 Space

Claims (4)

  A front side that is below the floor of the vehicle and behind the side in the vehicle width direction of the bumper, and covers the front side wall of the front wheel tire house and the front side wall of the front wheel tire house from the vehicle width direction outer side to the front end of the vehicle An engine control device for controlling the operation of the engine is disposed in a space surrounded by the panel, and an air flow is formed around the engine control device by traveling of the vehicle. Mounting structure.   Ramps are mounted on the side of the bumper in the vehicle width direction, and an air flow is introduced into the vehicle body from an opening provided around the lamps when the vehicle is running to form an air flow around the engine control device. The engine control device mounting structure according to claim 1, which is configured as described above.   3. The engine control device is attached to a chassis frame via a stay, and the engine control device is disposed above the chassis frame and a top portion is disposed in the vicinity of the floor. The mounting structure of the engine control device described in 1.   An air flow flowing in from the front of the vehicle body passes around the engine control device, and then flows backward through a space formed between a chassis frame and a side wall of the front wheel tire house. The engine control device mounting structure according to claim 1 or 2.

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