JP2006266209A - Fuel pipe arrangement structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuel pipe arrangement structure in which a fuel pipe is laid out on the exhaust side while using a water pipe for preventing the temperature rise of the fuel pipe. <P>SOLUTION: An intake side mounting flange of an intake manifold provided on one side of a cylinder head is fixed to the upper part of a cylinder head and an exhaust side mounting flange of an exhaust manifold provided on the other side of the cylinder head is fixed to the lower part of the cylinder head to form a mounting space between the exhaust manifold and the upper face of an engine. In the mounting space, the water pipe to be communicated with the engine is arranged along the longitudinal direction of the engine and the fuel pipe is arranged along the water pipe and fixed to the upper face of the water pipe. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuel pipe arrangement structure, and more particularly to a fuel pipe arrangement structure that lays out a fuel pipe so as to prevent temperature rise of the fuel pipe when the fuel pipe is arranged on the exhaust side of an engine. Is.

  In a vehicle, when an engine is mounted vertically in an engine room, an intake manifold of an intake device and an exhaust manifold of an exhaust device are attached to the left and right side surfaces of the engine, a fuel pipe of a fuel supply device, and a cooling device A water pipe or the like is provided.

Conventionally, some direct injection spark ignition internal combustion engines have a high-pressure fuel pump attached to a cylinder head and a fuel pipe disposed inside an intake manifold.
Some vehicle fuel cooling devices have a fuel pipe partially disposed in a water pipe.
Further, some marine engine fuel cooling devices are provided with a fuel cooler in the middle of a fuel pipe.
JP-A-1996-270520 Japanese Utility Model Publication No. 63-61569 Japanese Utility Model Publication No. 3-6046

  By the way, in a conventional vertical engine of a vehicle, when the fuel pipe of the fuel supply device is disposed on the exhaust side where the exhaust device of the engine is attached, the temperature of the fuel pipe is increased by the heat of the exhaust device. Since fuel is vaporized in the fuel pipe and the fuel pipe is blocked by air bubbles, fuel cannot be supplied and the engine is stopped. Therefore, improvement has been desired.

  Also, in the case of a longitudinal engine of a vehicle, when a fuel pipe is laid out on the vehicle rear side, when an excessive force is applied from the front of the vehicle, the fuel pipe is made of an aluminum or cast iron cylinder head behind the engine, The cylinder block or the cooling case and the sheet metal dash panel are sandwiched between them, resulting in inconvenience.

  In the present invention, an intake manifold is disposed on one side of a cylinder head of an engine mounted on a vehicle, an exhaust manifold is disposed on the other side of the cylinder head, and a delivery pipe is disposed above the intake manifold. In a fuel pipe arrangement structure in which a fuel pipe that connects the delivery pipe and a fuel tank arranged at the rear of the vehicle is supported by the cylinder head, the intake manifold provided on one side of the cylinder head An intake side mounting flange is fixed to the upper part of the cylinder head, an exhaust side mounting flange of the exhaust manifold provided on the other side of the cylinder head is fixed to a lower part of the cylinder head, and the exhaust manifold and the upper surface of the engine A mounting space is formed between the engine and the mounting space. A water pipe that is disposed along the longitudinal direction of the engine, characterized by being fixed to an upper surface of the water pipe as well as disposing the fuel pipe along the water pipe.

  According to the fuel pipe arrangement structure of the present invention, in a mounting space formed between the exhaust manifold and the upper surface of the engine, a water pipe communicating with the engine is arranged along the longitudinal direction of the engine, and the fuel pipe is connected to the water pipe. And the temperature of the fuel pipe can be prevented from being increased by the water pipe, so that the fuel pipe can be laid out on the exhaust side.

In order to lay out the fuel pipe on the exhaust side of the engine, the present invention is realized by arranging the fuel pipe along the water pipe arranged above the exhaust manifold and fixing it to the upper surface of the water pipe. Is.
Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

  1 to 9 show a first embodiment of the present invention.

  6 to 9, reference numeral 2 denotes an engine room of a vehicle (not shown), and 4 denotes a multi-cylinder mounted vertically on the vehicle in the engine room 2 (for example, four cylinders: # 1, # 2, # 3, # 4)), 6 is a cylinder block of the engine 4, 8 is a lower case fixed to the lower part of the cylinder block 6, 10 is a cylinder head fixed to the upper part of the cylinder block 6, 12 Is a cylinder head cover attached to the upper part of the cylinder head 10, 14 is an oil pan attached to the lower part of the lower case 8, and 16 is a dash panel that partitions the engine room 2 and the vehicle compartment 18 behind the engine 2.

  As shown in FIGS. 6 and 9, an intake manifold 22 of the intake device 20 is disposed on the right side of the vehicle that is one side of the cylinder head 10, and an exhaust gas is disposed on the left side of the vehicle that is the other side of the cylinder head 10. An exhaust manifold 26 of the device 24 is disposed. In this case, as shown in FIG. 7, the intake side mounting flange 28 of the intake manifold 22 is fixed to the upper part of the cylinder head 10, and as shown in FIG. 8, the exhaust side mounting flange 30 of the exhaust manifold 26 is It is fixed to the lower part of the head 10. As a result, as shown in FIG. 8, a mounting space 32 as a space is formed between the exhaust manifold 26 and the upper surface of the engine 4.

  As shown in FIGS. 1 and 2, the cylinder head 10 has an ignition plug 34-1 to 34-4 corresponding to each cylinder, and an ignition plug 34-1 to 34-4 corresponding to each cylinder. Fuel injection valves 36-1 to 36-4 are attached, and a throttle body 38, a canister purge valve 40, a canister purge hose 42, a canister fuel hose 44, which will be described later, on the right side of the vehicle on the intake side. A vacuum hose 46, a PCV hose 48, a breather hose 50, an intake pressure sensor 52, and a knock sensor 54 are attached to the fuel pressure regulating valve 98, and an EGR valve 56 is provided on the vehicle rear side. An EGR pipe 58 and a temperature sensor 60 are attached.

  Further, as shown in FIGS. 8 and 9, one end side of an outlet-side water pipe 66 as a water pipe of the cooling device 64 is connected to the cylinder head 10 to a cooling water outlet 62 which is an outlet side of the rear engine 4. is doing. The other end of the outlet-side water pipe 66 is connected to a cooling water inlet (not shown) of the radiator. The outlet-side water pipe 66 communicates with the engine 4 in the mounting space 32 and is disposed along the longitudinal direction of the engine 4 to guide cooling water cooled by the radiator to the engine 4 side.

  As shown in FIGS. 4 and 5, the outlet-side water pipe 66 includes a pipe main body 68 provided with an engine-side connection portion 70 on one end side and a radiator-side connection portion 72 on the other end side, and is connected to the engine 4 on both end sides. First first side mounting bracket 74-1, first other side mounting bracket 74-2 and second one side mounting bracket 76-1, second other side mounting bracket 76-2, third other side mounting bracket 76- 3 and further includes a center side mounting portion 78 and a fuel pipe mounting portion 80 on the center side.

  The cylinder head 10 is connected to the fuel injection valves 36-1 to 36-4 attached to the upper portion of the cylinder head 10 as a fuel supply device 82, and the fuel injection valves 36-1 to 36-4. A fuel delivery pipe 84 disposed above the manifold 22 and a fuel pipe 88 supported by connecting the fuel delivery pipe 84 and a fuel tank 86 disposed at the rear of the vehicle are provided. The fuel delivery pipe 84 is attached to the upper part of the cylinder head 10 with each delivery pipe attachment bolt 92 via each delivery pipe attachment bracket 90.

  As shown in FIG. 2, the fuel pipe 88 includes a supply side fuel pipe 96 that guides fuel from a fuel pump 94 installed in the fuel tank 86 to the fuel delivery pipe 84, and a fuel pressure adjustment valve 98 attached to the fuel delivery pipe 96. The return side fuel pipe 100 for returning surplus fuel from the fuel tank 86 into the fuel tank 86, and the canister fuel pipe 44.

  As shown in FIG. 3, the supply side fuel pipe 96 and the return side fuel pipe 100 are fixed to the vehicle body by a plurality of clamps 102, and the portion on the fuel delivery pipe 84 side is connected to the engine via the engine side mounting bracket 104. 4 is fixed.

  As shown in FIG. 1, the fuel pipe 88 is fixed to the upper surface of the water pipe 66 along the water pipe 66.

  That is, the supply-side fuel pipe 96, the return-side fuel pipe 100, and the canister fuel pipe 44 that constitute the fuel pipe 88 are disposed along the rear surface of the cylinder bed cover 12 from the exhaust-side side surface of the cylinder head cover 12. Along with the first and second vehicle pipes 106 and 108, the fuel pipe mounting portion of the rear bracket 110, the exhaust side brackets 112 and 112, and the water pipe 66 is disposed along the side surface on the intake side of the cylinder head cover 12. 80 and the vehicle body side bracket 114 are fixed to the engine 4 and the vehicle body.

  1, 2, and 8, the fuel pipe 88 extending along the rear surface of the engine 4 is disposed inside the water pipe 66 and disposed on the rear surface of the cylinder head 10. The EGR valve 56 is disposed inside.

  The engine 4 is provided with a collective harness 118 in which the engine harnesses 116 are assembled.

  Further, as shown in FIGS. 1, 2, and 8, the fuel pipe 88 disposed along the rear surface of the engine 4 is disposed inside the collective harness 118 in which the engine harnesses 116 are assembled on the rear surface of the cylinder head 10. It is arranged.

  The dash panel 16 behind the engine 4 is formed with an interference portion 120 that extends from the engine room 2 side to the inside of the vehicle compartment 18.

  Next, the operation of the first embodiment will be described.

  In the cooling device 64, the cooling water in the engine 4 is guided from the water pipe 66 to the radiator by driving a water pump (not shown) of the cooling device 64, and is cooled by the radiator to be discharged from the outlet-side water pipe 66. It is circulated again in the engine 4. Further, in the fuel supply device 82, the fuel in the fuel tank 86 is guided from the supply-side fuel pipe 96 to the fuel delivery pipe 84 and the fuel injection valve 36 by driving the fuel pump 94, and the fuel injection valve 36 provides the engine. 4 is injected. In the engine 4, the air from the intake manifold 22 is guided to the inside, and the exhaust is discharged from the exhaust manifold 26.

  In this embodiment, the intake mounting flange 28 of the intake manifold 22 provided on one side of the cylinder head 10 is fixed to the upper portion of the cylinder head 10 and the exhaust manifold 26 provided on the other side of the cylinder head 10 is mounted on the exhaust. The flange 30 is fixed to the lower part of the cylinder head 10, and a mounting space 32 is formed between the exhaust manifold 26 and the upper surface of the engine 4. In this mounting space 32, a water pipe 66 communicating with the engine 4 is connected to the engine 4. Since the fuel pipe 88 is disposed along the longitudinal direction and the fuel pipe 88 is disposed along the water pipe 66 and is fixed to the upper surface of the water pipe 66, the water pipe 66 prevents the fuel pipe 88 from being heated. Lay out the fuel pipe 88 on the exhaust side. It can be.

  Further, since the engine 4 is a vertical engine, the fuel pipe 88 and the water pipe 66 can be arranged along the vehicle front-rear direction, and the fuel pipe 88 can be prevented from being elongated.

  Further, since the water pipe 66 is an outlet side water pipe 66 that connects the cooling water outlet 62 on the outlet side of the engine 4 and the inlet side of the radiator, the water pipe 66 does not affect the cooling performance of the engine 4. The temperature of the fuel pipe 88 can be prevented by the pipe 66.

  Furthermore, a fuel pipe 88 is disposed along the rear surface of the cylinder bed cover 12 from the exhaust side surface of the cylinder head cover 12 of the engine 4. Since the interference portion 120 that expands to the inside of 18 is formed, it is possible to sufficiently secure a fuel pipe protective space for protecting the fuel pipe 88 when an excessive force is applied from the front of the vehicle.

  In addition, since the fuel pipe 88 extending along the rear surface of the engine 4 is disposed inside the water pipe 66, the dash panel 16 and the water pipe 66 interfere when an excessive force is applied from the front of the vehicle. Therefore, a protective space for the fuel pipe can be secured, and the fuel pipe 66 can be prevented from being damaged.

  Furthermore, since the fuel pipe 88 extending along the rear surface of the engine 4 is disposed inside the EGR valve 56 disposed on the rear surface of the cylinder head 10, when an excessive force is applied from the front of the vehicle. Since the dash panel 16 and the EGR valve 56 interfere with each other, a protective space for the fuel pipe can be secured and the fuel pipe 88 can be prevented from being damaged.

  Further, since the fuel pipe 88 disposed along the rear surface of the engine 4 is disposed inside the collective harness 118 in which the engine harnesses 116 are assembled on the rear surface of the cylinder head 10, it is excessively large from the front of the vehicle. When the force is applied, the dash panel 16 and the collective harness 118 interfere with each other, so that a protective space for the fuel pipe can be secured and the fuel pipe 88 can be prevented from being damaged.

  FIG. 10 shows a special configuration of the present invention and shows a second embodiment.

  In the following embodiments, portions having the same functions as those of the first embodiment will be described with the same reference numerals.

  The features of the second embodiment are as follows. That is, on the exhaust side of the engine 4, on the upper side of the outlet side water pipe 66, for example, a pipe holding portion 202 for holding the supply side fuel pipe 96 of the fuel pipe 88 is formed to be depressed, and this pipe holding The supply side fuel pipe 96 is held in the portion 202.

  According to the configuration of the second embodiment, the supply-side fuel pipe 96 is disposed in contact with the outlet-side water pipe 66, so that the fuel can be efficiently cooled and the supply-side fuel pipe 96 is firmly supported. Can be.

  FIG. 11 shows a special configuration of the present invention and shows a third embodiment.

  The features of the third embodiment are as follows. That is, a plurality of heat radiating fins 204 are erected on the exhaust side bracket 112 that holds the fuel pipe 88.

  According to the configuration of the third embodiment, when the traveling wind hits the heat radiating fins 204, the heat of the fuel pipe 88 can be released through the exhaust side bracket 112, and the temperature rise of the fuel pipe 88 can be prevented.

  Further, in the third embodiment, a traveling wind introduction body 206 is provided in the front part of the vehicle on the exhaust side of the engine 4 and the fuel pipe 88 is actively moved by the traveling wind guided from the traveling wind introduction body 206. The temperature of the fuel pipe 88 can be prevented from being cooled.

  The structure in which the fuel pipe is laid out on the exhaust side can be applied to other engines.

It is a perspective view from the exhaust side of the fuel pipe arrangement structure in the first embodiment. It is a perspective view from the intake side of the fuel pipe arrangement structure in the first embodiment. It is a perspective view of a fuel supply device in the 1st example. It is a top view of a water pipe in the 1st example. It is a side view of the water pipe by the arrow V of FIG. 4 in 1st Example. It is a top view of an engine in the 1st example. 1 is a side view of an intake side of an engine in a first embodiment. It is a side view of the exhaust side of the engine in the first embodiment. FIG. 9 is a rear view of the engine according to an arrow IX-IX in FIG. 8 in the first embodiment. It is a perspective view of the state which made the water pipe hold the water pipe in 2nd Example. It is a perspective view of a water pipe on the exhaust side of the engine in the third embodiment.

Explanation of symbols

2 Engine room 4 Engine 10 Cylinder head 12 Cylinder head cover 16 Dash panel 18 Car compartment 22 Intake manifold 26 Exhaust manifold 28 Intake side mounting flange 30 Exhaust side installation flange 32 Installation space 56 EGR valve 66 Water pipe 84 Fuel delivery pipe 86 Fuel tank 88 Fuel pipe 116 Engine harness 118 Assembly harness 120 Interference part

Claims (7)

  An intake manifold is disposed on one side of a cylinder head of an engine mounted on a vehicle, an exhaust manifold is disposed on the other side of the cylinder head, and a delivery pipe is disposed above the intake manifold. An intake side mounting flange of the intake manifold provided on one side of the cylinder head in a fuel pipe arrangement structure in which a fuel pipe that communicates between a delivery pipe and a fuel tank provided behind the vehicle is supported by the cylinder head Is fixed to the upper part of the cylinder head, and an exhaust side mounting flange of the exhaust manifold provided on the other side of the cylinder head is fixed to the lower part of the cylinder head, and is mounted between the exhaust manifold and the upper surface of the engine. A space is formed, and this installation space includes a warp that communicates with the engine. Disposed along the pipe in the longitudinal direction of the engine, mounting structure of the fuel pipe, characterized in that fixed to the upper surface of the water pipe as well as disposing the fuel pipe along the water pipe.   The fuel pipe arrangement structure according to claim 1, wherein the engine is a vertical engine.   The fuel pipe arrangement structure according to claim 2, wherein the water pipe is an outlet-side water pipe that connects an outlet side of the engine and an inlet side of the radiator.   The fuel pipe is disposed along the rear surface of the cylinder bed cover from the exhaust side surface of the cylinder head cover of the engine, and the dash panel at the rear of the engine extends from the engine room side to the inside of the vehicle compartment. The fuel pipe arrangement structure according to claim 2, wherein the fuel pipe is disposed.   The fuel pipe arrangement structure according to claim 4, wherein a fuel pipe extending along a rear surface of the engine is arranged inside the water pipe.   The fuel pipe arrangement structure according to claim 4, wherein a fuel pipe extending along a rear surface of the engine is arranged inside an EGR valve arranged on a rear surface of the cylinder head.   5. The fuel pipe according to claim 4, wherein the fuel pipe disposed along the rear surface of the engine is disposed inside a collective harness in which each engine harness is assembled on the rear surface of the cylinder head. Arrangement structure.

Images