JP4736132B2 - Vehicle fuel piping structure - Google Patents

Description

  The present invention relates to a fuel piping structure of a vehicle, and in particular, a power train is mounted in an engine room so as to extend in the vehicle width direction, and a fuel piping for sending fuel to the engine is provided along a dash panel positioned behind a belt type continuously variable transmission. The present invention relates to a fuel piping structure for a vehicle that enhances the engine performance as a structure that can cool the fuel piping by cooling air that has passed through a radiator fan.

A front bumper and a headlamp are arranged at the front of the vehicle, and an engine room partitioned by a vehicle compartment and a dash panel is formed behind them.
The engine room is covered with a fender panel on both sides in the vehicle width direction, and is covered with a front hood panel above the vehicle.
In addition, a power train formed by connecting an engine and a belt-type continuously variable transmission is mounted in the engine room in front of the dash panel so as to extend in the vehicle width direction.
A fuel pipe for sending fuel to the engine extends upward from below the vehicle along a dash panel located behind the belt-type continuously variable transmission.

JP-A-8-200196 Japanese Utility Model Publication No. 5-951

By the way, in the conventional fuel piping structure of a vehicle, as shown in FIG. 5, a power train 112 in which an engine 110 and an automatic transmission 111 are connected to an engine room 106 is mounted so as to extend in the vehicle width direction.
A radiator 108 and a radiator fan 109 are disposed in front of the automatic transmission 111, and a gap A appears between the automatic transmission 111 and the rear dash panel 103.
A dash panel 103 positioned behind the automatic transmission 111 is provided with a fuel pipe 113 for sending fuel to the engine 110 so as to extend upward from the vehicle lower side along the dash panel 103.
At this time, the fuel pipe 113 includes a metal fuel pipe 116 and a rubber fuel hose 133, and a connection portion P between the metal fuel pipe 116 and the rubber fuel hose 133 is the automatic transmission 111. It will be located behind.
Therefore, when the upper surface of the transmission case 114 is inclined so as to decrease in height toward the rear of the vehicle as in the automatic transmission 111, the cooling air that has passed through the radiator fan 109 is transmitted to the transmission case 114. The fuel pipe 113, particularly the metal fuel pipe 116 disposed on the dash panel 103, can be cooled with cooling air.

On the other hand, when the belt type continuously variable transmission 111 is mounted in the engine room 106, a pair of transmission pulleys and a belt wound around these pulleys are accommodated in the belt type continuously variable transmission 111. 5, an inclined surface 115 that rises rearward of the vehicle may be formed on the upper surface of the transmission case 114 as indicated by the hatched portion.
However, in this case, since the cooling air that has passed through the radiator fan 109 flows upward along the inclined surface 115, the cooling air does not flow below the dash panel 103, and the fuel temperature rises and the engine operating performance deteriorates. is there.

  An object of the present invention is to mount a power train that connects an engine and a belt-type continuously variable transmission in an engine room in front of the dash panel so as to extend in the vehicle width direction, and to connect a fuel pipe for sending fuel to the engine to the belt-type An inclined surface that rises toward the rear of the vehicle is formed on the upper surface of the transmission case of the belt-type continuously variable transmission with respect to the fuel piping of the vehicle that extends upward from below the vehicle along the dash panel located at the rear of the step transmission. However, the fuel piping structure for a vehicle with improved engine operating performance is realized as a structure that can cool the fuel piping with the cooling air that has passed through the radiator fan.

Therefore, in order to eliminate the inconvenience described above, the present invention is equipped with a power train formed by connecting an engine and a belt type continuously variable transmission to an engine room in front of the dash panel so as to extend in the vehicle width direction. When viewed from above the vehicle , a radiator and a radiator fan are arranged in front of the belt-type continuously variable transmission, and a fuel pipe for sending fuel to the engine is provided along the dash panel behind the belt-type continuously variable transmission. In a fuel piping structure for a vehicle, wherein an inclined surface rising toward the rear of the vehicle is formed on an upper surface of a transmission case of the belt-type continuously variable transmission while extending so as to extend upward from below the vehicle. Of the inclined surface, an extension portion extending in a vertical direction to a position higher than the top of the inclined surface is formed in a portion made of a metal fuel pipe. It arranged a canister at a predetermined gap above, and the case viewed engine room from the front, lower than the thermostat case and the battery case in the vehicle width direction on both sides of the canister bottom of both the canister A space portion that is surrounded by the canister, the inclined surface, the thermostat case, and the battery case is formed in front of the extension portion, and the radiator fan is passed through the space portion. The cooling air is guided to the extension portion.

According to the present invention, the metal fuel pipe can be extended to a height at which the cooling air flows in the vertical direction by the above structure, and the metal fuel pipe can be cooled by the cooling air.
In addition, by arranging the canister as described above, the flow of the cooling air that is going to flow obliquely upward along the inclined surface is changed in the horizontal direction on the bottom surface of the canister and guided to the extension portion. The amount of cooling air to be cooled can be increased.
Therefore, it is possible to prevent the deterioration of the engine operating performance due to the increase in fuel temperature.

  By inventing as described above, in the fuel piping structure of a vehicle, an extension portion extending in a vertical direction to a position higher than the top of the inclined surface is formed in a portion made of a metal fuel pipe in the fuel piping, while the inclined surface A canister is disposed above the upper portion of the canister with a predetermined gap, and a space portion facing the extension portion is formed between the canister and the inclined surface, and the cooling air that has passed through the radiator fan is guided to the extension portion through the space portion. This prevents the engine performance from deteriorating due to the temperature rise.

  Embodiments of the present invention will be described below in detail with reference to the drawings.

1 to 4 show an embodiment of the present invention.
1 and 2, reference numeral 1 denotes a vehicle.
As shown in FIG. 1, the vehicle 1 is provided with a front bumper 2 at the front.
As shown in FIGS. 1 and 2, the rear of the front bumper 2 is partitioned from the interior 4 by a dash panel 3 and an engine room 6 is formed which is covered by a front hood panel 5 above the vehicle 1.

At this time, as shown in FIG. 1, an opening 7, for example, an upper opening 7-1 and a lower opening 7-2 are sequentially formed in the front bumper 2 of the vehicle 1 from above.
The upper stage opening 7-1 is formed in a shape extending in the vehicle width direction.
As a result, the upper opening 7-1 enables the intake of the cooling air, which is the traveling air, to the radiator 8 in the engine room 6.

Further, as shown in FIGS. 1 and 2, a radiator 8 and a radiator fan 9 located behind the radiator 8 are disposed at the rear part of the front bumper 2.
At this time, the radiator 8 and the radiator fan 9 are arranged at the vehicle rear portion of the upper opening 7-1 and the lower opening 7-2 which are the openings 7 formed in the front bumper 2 as shown in FIG. Will be established.
As a result, the cooling air, which is the running air flowing in from the upper opening 7-1 and the lower opening 7-2, which are the openings 7, can be reliably sent to the radiator 8 and the radiator fan 9.

Further, as shown in FIGS. 1 to 3, a power train 12 connecting the engine 10 and the belt type continuously variable transmission 11 is mounted in the engine room 6 in front of the dash panel 3 so as to extend in the vehicle width direction.
That is, the engine 10 is a horizontal type.

When the engine room 6 is viewed from the vehicle width direction perpendicular to the vehicle traveling direction, the radiator 8 and the radiator fan 9 are disposed in front of the belt type continuously variable transmission 11 as shown in FIGS. As shown in FIG. 1, a fuel pipe 13 for sending fuel to the engine 10 is disposed along the dash panel 3 at the rear of the belt-type continuously variable transmission 11 so as to extend upward from below the vehicle. As shown in FIGS. 1 to 3, an inclined surface 15 rising toward the rear of the vehicle is formed on the upper surface of the transmission case 14 of the belt type continuously variable transmission 11.
At this time, an extension portion 17 extending in a vertical direction to a position higher than the top portion 15t of the inclined surface 15 is formed in a portion made of the metal fuel pipe 16 in the fuel pipe 13, and on the upper side of the inclined surface 15. A canister 18 is disposed with a predetermined gap therebetween, and a space 19 that faces the extension 17 is formed between the canister 18 and the inclined surface 15, and the cooling that has passed through the radiator fan 9 through the space 19. The wind is configured to be guided to the extension portion 17.

More specifically, in the engine room 6 of the vehicle 1, as shown in FIGS. 1 to 3, a power train 12 connecting the engine 10 and the belt-type continuously variable transmission 11 extends in the vehicle width direction, that is, The engine 10 is located on the right side of the vehicle, and is mounted so as to be a horizontal type in which the belt type continuously variable transmission 11 is located on the left side of the vehicle.
At this time, the engine 10 is in a state in which the upper side is inclined toward the front of the vehicle, and the output shaft center 20 of the belt-type continuously variable transmission 11 is located behind the belt-type continuously variable transmission 11 as shown in FIG. Is located.
Thereby, the height dimension when the engine 10 is mounted in the engine room 6 is lowered.

As shown in FIG. 2, a cylinder head cover 21 is positioned on the upper surface of the engine 10 on the right side of the vehicle, and an exhaust manifold 22 and a catalyst case 23 are disposed on the vehicle front side of the engine 10.
As shown in FIGS. 1 to 3, an intake manifold 24, a throttle body 25, and a delivery pipe 26 are disposed on the vehicle rear side of the engine 10.
The delivery pipe 26 is provided with a fuel injection valve 27 for injecting and supplying fuel to the engine 10.

Further, as shown in FIGS. 1 and 2, a radiator 8 and a radiator fan 9 are positioned in front of the belt type continuously variable transmission 11 on the left side of the vehicle, and a transmission case of the belt type continuously variable transmission 11. 14 is formed with an inclined surface 15 that rises toward the rear of the vehicle, as shown by the hatched portion in FIGS. 1 and 2, so as to be wound around a drive pulley 29 and a driven pulley 30 (to be described later) and accommodate the belt.
A canister 18 and a battery case 28 are disposed above the inclined surface 15 and on the left side of the vehicle with a predetermined gap therebetween. As shown in FIGS. The space 19 that can guide the cooling air that has passed through the radiator 8 and the radiator fan 9 in the front of the vehicle in the room 6 to the dash panel 3 on the rear side of the vehicle is formed.
Reference numeral 29 denotes a driving pulley of the belt-type continuously variable transmission 11, 30 denotes a driven pulley of the belt-type continuously variable transmission 11, 31 denotes an input shaft center of the driving pulley 29, and 32 denotes a counter shaft center of the driven pulley 30. .

Further, as shown in FIG. 1, a fuel pipe 13 for sending fuel from a fuel tank (not shown) to the engine 10 extends upward from below the vehicle along the dash panel 3 behind the belt type continuously variable transmission 11. And a rubber fuel hose 33 communicating the metal fuel pipe 16 and the delivery pipe 26.
At this time, an extension portion 17 extending to a position higher than the top portion 15t of the inclined surface 15 is formed at the end portion of the metal fuel pipe 16 that communicates with the rubber fuel hose 33 as shown in FIG. .
That is, in the metal fuel pipe 16, the end portion on the side communicating with the rubber fuel hose 33 is extended to form the extension portion 17, and as shown in FIG. The connecting portion with the fuel hose 33, that is, the connecting portion P between the extension portion 17 formed on the metal fuel pipe 16 and the rubber fuel hose 33 is positioned higher than the top portion 15t of the inclined surface 15. is there.
Then, this extension portion 17 faces the vehicle rear side of the space portion 19.
As a result, the cooling air that has passed through the radiator 8 and the radiator fan 9 in front of the vehicle in the engine room 6 is guided by the space 19 to the extension 17 of the metal fuel pipe 16.

Furthermore, as shown in FIG. 4, a heater unit 34 is disposed in a room 4 separated from the engine room 6 by the dash panel 3, and between the heater unit 34 and a thermostat case 35 attached to the engine 10. Is communicated by the heater hose 36.
3 and 4, the heater hose 36 is directed to the dash panel 3 side from the vehicle rear side of the thermostat case 35, then once directed to the vehicle left side, and thereafter directed to the vehicle rear side to The heater inlet hose 37 connected to the unit 34 and the heater inlet hose 37 above the connecting portion of the heater unit 34 are directed from the heater unit 34 toward the vehicle front, and then directed to the vehicle right side and the vehicle front twice. A heater outlet hose 38 that repeatedly passes through the lower portion of the thermostat case 35 and communicates with a water pump (not shown).
At this time, the fuel pipe 13 is communicated with the engine 10 in the vertical direction through the upper portion of the heater hose 36, and the portion of the fuel pipe 13 passing through the upper portion of the heater hose 36 is connected with the rubber fuel hose 33. Piping.
As a result, the fuel pipe 13 is made of a rubber heat hose 33 having a high heat insulating property at a portion passing above the heater hose 36, and the fuel is prevented from being heated by the heat of the heater hose 36.

  Next, the operation will be described.

When the vehicle 1 travels forward, as shown in FIGS. 1 and 2, cooling air, which is traveling air, flows into the engine room 6 from the opening 7 formed in the front bumper 2, for example, the upper upper opening 7-1. It is captured.
Then, the cooling air that sequentially passes through the radiator 8 and the radiator fan 9 reaches the belt-type continuously variable transmission 11 and reaches the inclined surface 15 formed on the upper surface of the transmission case 14 of the belt-type continuously variable transmission 11.
The cooling air that flows rearward and obliquely upward along the inclined surface 15 reaches the space 19 formed by the canister 18 and the inclined surface 15.
In this space portion 19, the flow of the cooling air is changed by the bottom surface of the canister 18, and the cooling air flows in the rear and horizontal directions of the vehicle.
At this time, the downstream end portion of the space portion 19 faces the extension portion 17 formed at the end portion of the fuel pipe 13 on the side in contact with the rubber fuel hose 33 in the metal fuel pipe 16. Therefore, the horizontal cooling air flowing through the space 19 is guided to the extension 17.

Further, as shown in FIGS. 3 and 4, the cooling water in the thermostat case 35 is pumped to the heater unit 34 by the water pump through the heater inlet hose 37, and the cooling water cooled by the heater unit 34 is The heater outlet hose 38 flows to the water pump on the thermostat case 35 side.
At this time, the fuel pipe 13 communicates with the engine 10 in the vertical direction through the heater hose 36, and a portion of the fuel pipe 13 that passes above the heater hose 36 passes through the rubber fuel hose. Therefore, the fuel in the rubber fuel hose 33 is prevented from being heated by the heat of the heater hose 36.

That is, in the embodiment of the present invention, a power train 12 formed by connecting an engine 10 and a belt type continuously variable transmission 11 is mounted on an engine room 6 in front of the dash panel 3 so as to extend in the vehicle width direction. Is seen from the vehicle width direction orthogonal to the vehicle traveling direction, the radiator 8 and the radiator fan 9 are arranged in front of the belt-type continuously variable transmission 11, and the fuel pipe 13 for sending fuel to the engine 10 is connected to the belt-type. While arranged so as to extend upward from below the vehicle along the dash panel 3 behind the continuously variable transmission 11, the belt type continuously variable transmission 11 rises toward the rear of the vehicle on the upper surface of the transmission case 14. In the fuel piping structure of the vehicle in which the inclined surface 15 is formed, the portion of the fuel piping 13 that is made of the metal fuel pipe 16 is vertically forward. An extension portion 17 extending to a position higher than the top portion 15t of the inclined surface 15 is formed, and a canister 18 is disposed above the inclined surface 15 with a predetermined gap between the canister 18 and the inclined surface 15. A space portion 19 that faces the extension portion 17 is formed, and cooling air that has passed through the radiator fan 9 through the space portion 19 is guided to the extension portion 17.
Therefore, with the above structure, the metal fuel pipe 16 can be extended to a height where the cooling air flows in the vertical direction, and the metal fuel pipe 16 can be cooled by the cooling air.
Further, by providing the canister 18 as described above, the flow of the cooling air that is going to flow obliquely upward along the inclined surface 15 is changed in the horizontal direction on the bottom surface of the canister 18 and led to the extension portion 17. The amount of cooling air that cools the extension 17 can be increased.
Therefore, it is possible to prevent the deterioration of the engine operating performance due to the temperature rise of the fuel.

In addition, a heater unit 34 is disposed in a room 4 separated from the engine room 6 by the dash panel 3, the heater unit 34 and the engine 10 are connected by a heater hose 36, and the fuel pipe 13 is connected. While communicating with the engine 10 in the vertical direction through the upper portion of the heater hose 36, a portion of the fuel pipe 13 passing through the upper portion of the heater hose 36 is piped with a rubber fuel hose 33.
Therefore, by extending the fuel pipe 13 to a position higher than the heater hose 36 in the vertical direction, the extension 17 of the metal fuel pipe 16 can be lengthened and the cooling area can be expanded.
Further, in the portion passing above the heater hose 36, the fuel pipe 13 is made of a rubber fuel hose 33 having a high heat insulating property, so that the fuel can be prevented from being heated by the heat of the heater hose 36.

It is a left view of the engine room of the vehicle which shows the Example of this invention. It is a schematic plan view of the engine room of a vehicle. It is a schematic front view of the engine room of a vehicle. It is a schematic plan view of the fuel piping part which shows the periphery of fuel piping. It is a left view of the engine room of the vehicle which shows the prior art of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Front bumper 3 Dash panel 4 Indoor 5 Front food panel 6 Engine room 7 Opening part 7-1 Upper stage opening part 7-2 Lower stage opening part 8 Radiator 9 Radiator fan 10 Engine 11 Belt type continuously variable transmission 12 Power train 13 Fuel piping 14 Transmission case 15 Inclined surface 15t Top 16 Metal fuel pipe 17 Extension 18 Canister 19 Space 28 Battery case 33 Rubber fuel hose 34 Heater unit 35 Thermostat case 36 Heater hose 37 Heater inlet hose 38 Heater outlet hose

Claims (1)

If the power train formed by connecting the engine and the belt-type continuously variable transmission in an engine room of the dash panel front mounted so as to extend in the vehicle width direction, as viewed the engine room from above the vehicle, the belt radiator and the radiator fan A fuel pipe that is arranged in front of the continuously variable transmission and that supplies fuel to the engine extends along the dash panel behind the belt-type continuously variable transmission so as to extend upward from below the vehicle; In the fuel piping structure for a vehicle in which an inclined surface rising toward the rear of the vehicle is formed on the upper surface of the transmission case of the belt-type continuously variable transmission, a portion of the fuel piping made of a metal fuel pipe is vertically while forming an extension extending at a higher position than the top portion of the inclined surface, disposed canister at a predetermined gap above the inclined surface, and When the engine room is viewed from the front, a thermostat case and a battery case are arranged on both sides of the canister in the vehicle width direction so that the lower portions of both protrude from the canister to the lower side, and the canister and the inclined surface And a space surrounded by the thermostat case and the battery case is formed in front of the extension, and the cooling air that has passed through the radiator fan is guided to the extension through the space. The fuel piping structure of the vehicle.

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