JP6108072B2 - Vehicle internal combustion engine - Google Patents

Description

  The present invention relates to an internal combustion engine of a vehicle capable of accurately protecting a fuel system against entry of a collision object.

  In an internal combustion engine with a supercharger, an internal combustion engine having an in-cylinder injection valve that directly injects fuel into a combustion chamber is known. In an internal combustion engine with a supercharger, fuel injection from a cylinder injection valve is appropriately controlled to improve exhaust gas purification performance and fuel efficiency.

  High pressure fuel is supplied from a high pressure pump driven by a camshaft to an in-cylinder injection valve that directly injects fuel into the combustion chamber. For this reason, the camshaft is provided with a pump cam, a high-pressure pump is disposed in the cylinder head portion of the internal combustion engine, and the high-pressure pump is driven by the pump cam synchronized with the rotation of the camshaft.

  An internal combustion engine with a supercharger is provided with an intercooler for cooling the supercharged intake air, and the outside air is guided to the intercooler to cool the intake air.

  A high-pressure fuel pump, an intercooler, etc. are arranged on the upper part of the internal combustion engine with a supercharger. Therefore, in order to make the internal combustion engine compact, the members such as the fuel pump and the intercooler are overlapped with each other. Had to be placed. If a plurality of members are arranged in an overlapping manner, a desired cooling air flow state may not be obtained. For example, introduction of cooling air into the intercooler may be hindered by a fuel system such as a fuel pump.

  For this reason, it has been proposed to extend the camshaft to the mounting surface side (rear side) of the transmission of the internal combustion engine and to attach the fuel pump on the extended cylinder head portion (Patent Document 1). In the technique of Patent Document 1, a duct is disposed between the intercooler at the top of the internal combustion engine and the fuel pump, and the cooling air is guided to the intercooler without hindering compactness.

  On the other hand, in a vehicle equipped with an internal combustion engine that uses fuel, it is necessary to minimize damage to the fuel system when a collision is assumed. For example, in the internal combustion engine equipped with the fuel pump described above, the fuel pump is arranged on the cylinder head portion, and the fuel pipe extends to the in-cylinder injection valve. Therefore, the collision object enters the portion where the camshaft is extended. At this time, the fuel pump and the fuel pipe may be damaged.

  Further, since the fuel pipe from the fuel pump on the cylinder head portion to the in-cylinder injection valve becomes long, a pressure loss for fuel pumping occurs, and the torque for driving the fuel pump (cam driving torque) increases. There is a risk that fuel consumption will deteriorate.

JP 2005-105884 A

  The present invention has been made in view of the above situation. Even when the camshaft is extended and the fuel pump is disposed at the end of the cylinder head, the length of the fuel pipe is shortened and the fuel system is prevented from entering the collision object. An object of the present invention is to provide an internal combustion engine for a vehicle that can accurately protect the vehicle.

In order to achieve the above object, an internal combustion engine of a vehicle according to the present invention according to claim 1 is an internal combustion engine for a vehicle, wherein one end of a camshaft extends from a cylinder head portion of a main body of the internal combustion engine, A pump case that covers a camshaft; a high-pressure fuel pump that is provided in the pump case and that is disposed below the camshaft and is driven by the camshaft; and a fuel from the high-pressure fuel pump that supplies fuel to the main body of the internal combustion engine e Bei the combustion chamber and sends it to the in-cylinder injection valve for injecting directly into a cylinder injection valve fuel supply passage, the internal combustion engine, with a crankshaft is arranged to extend in the width direction of the vehicle, the intake manifold said internal combustion An upper end of the intake manifold is disposed above the high-pressure fuel pump in the height direction of the vehicle, and the in-cylinder injection valve fuel Supply channel is disposed below the manifold, and wherein the sending of fuel to the cylinder injection valve fuel supply passage from the high pressure fuel pump.

In the present invention according to claim 1, since the high pressure fuel pump for sending fuel to the in-cylinder injection valve through the in-cylinder injection valve fuel supply passage is provided on the lower side of the camshaft, the high-pressure fuel pump is connected to the in-cylinder injection valve (in-cylinder It is possible to arrange the fuel system near the injection valve fuel supply path), and it is not necessary to lengthen the fuel pipe, and even when a collision object enters, the fuel system such as the high-pressure fuel pump and the pipe can be accurately connected by the intake system. It becomes possible to protect.
The upper end of the intake manifold is disposed above the high-pressure fuel pump in the height direction of the vehicle, and the in-cylinder injection valve fuel supply path is disposed in the lower portion of the intake manifold. In-cylinder injection valve fuel supply path) can be arranged near the fuel pipe, and it is not necessary to lengthen the fuel pipe (it can be shortened).

  For this reason, even if the camshaft is extended and a high-pressure fuel pump is arranged at the end of the cylinder head, the length of the fuel pipe can be shortened and the fuel system can be accurately protected against the intrusion of the collision object. Further, since the driving sound emitted from the high-pressure fuel pump that can be heard through the engine hood is shielded by a structure such as a cylinder head, the necessity for special sound insulation can be reduced.

An internal combustion engine for a vehicle according to a second aspect of the present invention is the internal combustion engine for a vehicle according to the first aspect , wherein an intercooler is provided on the vehicle front side of the intake manifold.

In the present invention according to claim 2 , when the collision object enters, the collision object contacts the intercooler, and further, the intercooler contacts the intake manifold and the movement of the intercooler is restricted. A collision of the collision object with the high-pressure fuel pump is prevented against entry. In this case, it is preferable to provide a protrusion on the intake manifold. By bringing the intercooler into contact with the projection of the intake manifold, the movement of the intercooler can be reliably regulated by the intake manifold.

According to a third aspect of the present invention, there is provided the internal combustion engine of the vehicle according to the second aspect , wherein the high pressure is provided between the intake manifold and the intake passage of the intercooler in the front-rear direction of the vehicle. A throttle valve is arranged in front of the fuel pump.

In the present invention according to claim 3 , since the throttle valve (throttle body) is arranged on the front side of the high-pressure fuel pump, even if a collision object enters, the collision object is the throttle valve (throttle body).
To prevent contact with the high-pressure fuel pump.

The internal combustion engine of a vehicle of the present invention according to claim 4, in an internal combustion engine for a vehicle according to claim 2 or claim 3, the main body of the internal combustion engine, disposed in each cylinder of the main body of the internal combustion engine A port injection valve for injecting fuel into the intake port, and a port injection fuel supply passage for supplying fuel to the port injection valve, wherein the upper part of the intercooler is located above the port injection valve fuel supply passage in the vehicle. It arrange | positions so that it may become an upper part in an up-down direction, It is characterized by the above-mentioned.

In the present invention according to claim 4 , it is possible to minimize damage to the fuel system in the internal combustion engine including the in-cylinder injection valve and the port injection valve.

An internal combustion engine for a vehicle according to a fifth aspect of the present invention is the internal combustion engine for a vehicle according to any one of the first to fourth aspects, wherein the pump case is scattered by the rotation of the camshaft. A guide wall member is provided for dropping the lubricating oil inside the cylinder head portion and guiding it to the operating portion of the high-pressure fuel pump.

In the present invention according to claim 5 , the guide wall member causes the lubricating oil inside the cylinder head portion to drop onto the operating portion of the high-pressure fuel pump, and the lubricating oil is applied to the pump cam provided on the camshaft and the sliding portion of the operating portion. To improve the lubricity.

  In the internal combustion engine of the vehicle of the present invention, even if the camshaft is extended and the fuel pump is disposed at the end of the cylinder head, the length of the fuel pipe is shortened and the fuel system is accurately protected against the intrusion of the collision object. Is possible.

It is a conceptual diagram of the vehicle explaining the internal combustion engine which concerns on one Example of this invention. 1 is a schematic system diagram of an internal combustion engine of a vehicle according to an embodiment of the present invention. 1 is an external view of an internal combustion engine of a vehicle according to an embodiment of the present invention. It is an external view of the internal combustion engine showing the fuel supply path of a fuel injection valve. 1 is a side view of an internal combustion engine viewed from the front side of a vehicle. It is an external view of an intake manifold. It is a side view of an intake manifold and an intercooler. It is a perspective view showing the inside of a pump case. It is the IX-IX arrow directional view in FIG. It is an external view from the arrow X direction in FIG.

  An overall configuration of an internal combustion engine according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 shows a concept of a vehicle for explaining an internal combustion engine according to an embodiment of the present invention, and FIG. 2 shows a schematic system of the internal combustion engine of the vehicle according to an embodiment of the present invention.

  The mounting state of the internal combustion engine will be described with reference to FIG.

  As shown in the drawing, an internal combustion engine (engine) 2 is mounted in an engine room in front of the vehicle 1, and the engine 2 includes an engine body (engine body) 5 including a cylinder block 3 and a cylinder head 4. ing. The engine 2 (engine body 5) is arranged with a crankshaft 6 extending in the width direction of the vehicle 1.

  An intake system (intake manifold, intercooler 24, fuel supply system, etc.) is provided on the front side of the vehicle 1 of the engine 2 (engine body 5), and a rear side of the vehicle 1 of the engine 2 (engine body 5) An exhaust system (exhaust pipe, supercharger, wastegate valve, exhaust purification catalyst, etc.) is provided.

  A camshaft is extended on the transmission surface side of the transmission of the cylinder head 4 of the engine body 5 of the vehicle 1, and the extended portion of the camshaft is accommodated in the pump case 45. A high pressure fuel pump 11 is attached to the lower part of the pump case 45, and the high pressure fuel pump 11 is driven by a pump cam provided on the camshaft. The engine 2 is provided with an in-cylinder injection valve for directly injecting fuel into the combustion chamber of each cylinder of the engine body 5 for each cylinder. Fuel from 11 is supplied to the in-cylinder injection valve.

  Further, the engine 2 of the vehicle 1 is provided with a port injection valve for injecting fuel into the intake passage of each cylinder of the engine body 5 for each intake passage, and through a low pressure fuel supply path as a port injection valve fuel supply path. The fuel from a low-pressure fuel pump provided in a fuel tank (not shown) is supplied to the port injection valve.

  The outline of the system (configuration) of the engine 2 will be described with reference to FIG.

  As shown in the drawing, an intake port 7 is formed for each cylinder in the cylinder head 4 of the engine 2, and an intake valve 8 is provided on the side of the combustion chamber 12 of each intake port 7. The intake valve 8 is opened and closed following the cam of the camshaft that rotates in accordance with the engine rotation, and communicates and shuts off the intake ports 7 and the combustion chambers 12.

  One end of an intake manifold 9 is connected to each intake port 7, and the intake manifold 9 communicates with each intake port 7. A port injection valve 13 is attached to the cylinder head 4 (or intake manifold 9), and fuel is sent to the port injection valve 13 by driving a low-pressure fuel pump.

  The cylinder head 4 of the engine 2 is provided with an exhaust port 16 for each cylinder, and an exhaust valve 10 is provided on the side of the combustion chamber 12 of each exhaust port 16. The exhaust valve 10 is opened and closed following the cam of the camshaft that rotates in accordance with the engine rotation, and communicates and blocks the exhaust ports 16 and the combustion chamber 12.

  An exhaust manifold 17 is provided in the cylinder head 4 of the engine 2, and one end of the exhaust manifold 17 is connected to each exhaust port 16. The other end of the exhaust manifold 17 serves as a collecting pipe and opens outward from the cylinder head 4.

  On the other hand, in-cylinder injection valves 18 facing the combustion chambers 12 are attached to the cylinder head 4, and fuel is sent to the in-cylinder injection valves 18 by driving the high-pressure fuel pump 11.

  The above-described engine 2 is controlled by appropriately selecting fuel injection from the port injection valve 13 by driving the low-pressure fuel pump and fuel injection from the in-cylinder injection valve 18 by driving the high-pressure fuel pump 11 according to the operating state. Is done.

  An intake pipe 21 is connected to the intake manifold 9 on the downstream side of the compressor 23 b of the turbocharger 23, and an exhaust pipe 22 is connected to the other end of the exhaust manifold 17 that opens outward from the cylinder head 4. Note that the exhaust inlet pipe of the turbocharger 23 may be directly connected to the other end of the exhaust manifold 17.

  A turbocharger 23 is provided in the middle of the intake pipe 21 and the exhaust pipe 22 as a supercharger. The turbocharger 23 is provided with a turbine 23a on the exhaust pipe 22 side, and a compressor 23b connected to the turbine 23a is connected to the intake pipe 21. Provided on the side. When the exhaust gas of the engine 2 is sent from the exhaust pipe 22 to the turbocharger 23, the turbine 23a is rotated by the flow of the exhaust gas, and the compressor 23b is rotated along with the rotation of the turbine 23a, so that the intake air in the intake pipe 21 is excessive. Be paid.

  An intercooler 24 is arranged in the intake pipe 21 upstream of the compressor 23 b of the turbocharger 23, and the intake air supercharged by the turbocharger 23 is cooled by the intercooler 24, and is supplied to the combustion chamber 12 via the throttle valve 25. Sent. An exhaust purification catalyst 26 is provided in the exhaust pipe 22 on the downstream side of the turbocharger 23.

  A waste gate valve (WG valve) 27 is provided between the upstream side and the downstream side of the turbocharger 23 of the exhaust pipe 22, and the WG valve 27 is opened and closed by driving (rotational driving) of the electric actuator 27a. By opening / closing the WG valve 27 by driving the electric actuator 27a, the amount of exhaust gas sent to the turbine 23a is adjusted to adjust the supercharging pressure.

  The structure of the engine 2 will be specifically described with reference to FIGS.

  3 shows the appearance of the engine 2 on the front side of the vehicle 1 (as viewed from the front side), FIG. 4 shows the appearance of the engine 2 showing the fuel supply path of the fuel injection valve, and FIG. 5 shows it from the front side of the vehicle. A side view of the engine 2, FIG. 6 shows the appearance of the intake manifold, and FIG. 7 shows the side surfaces of the intake manifold and the intercooler.

  4 is an external view in a state where the intercooler 24 and the intake manifold are removed from FIG.

  A turbocharger 23 is attached to the engine body 5 on the rear side of the vehicle 1. For example, a case on the compressor side of the turbocharger 23 is attached to the cylinder head 4 via a bracket or the like. An intercooler 24 is attached to the intake manifold 9 of the engine body 5 on the front side (the side shown in the figure) of the vehicle 1.

  The compressor inlet side of the turbocharger 23 is connected to an outside air introduction system (not shown) to introduce outside air, and the intake pipe 21a on the upstream side of the intercooler 24 is connected to the outlet side of the compressor. In addition, a WG valve is provided below the compressor of the turbocharger 23 of the engine body 5 on the rear side of the vehicle 1.

  The intake pipe 21a is connected to the compressor on the right side in the vehicle width direction when viewed from the front side of the vehicle 1 (in the state shown in the figure), and extends toward the left side and connected to the inlet side of the intercooler 24. . An intake pipe 21b on the downstream side of the intercooler 24 is connected to the outlet side (right side in the figure) of the intercooler 24. The intake pipe 21b is connected to the intake manifold 9 (see FIG. 2) via a throttle valve 25 (throttle body). It is connected.

  The WG valve 27 is located on the left side (left side in the forward direction of the vehicle 1) in the figure with the position of the other end (exhaust collecting portion) of the exhaust manifold 17 (see FIG. 2) with respect to the exhaust purification catalyst 26. .

  By driving a low-pressure fuel pump (not shown), fuel is sent from the low-pressure delivery 32 to the port injection valve 13 of each intake port 7 (port injection valve fuel supply path).

  A camshaft extends on the transmission mounting side (right side in the figure) of the cylinder head 4 of the engine body 5, and the extended portion of the camshaft is accommodated in the pump case 45. A high-pressure fuel pump 11 is attached to the lower part of the pump case 45 downward, and a driving plunger is biased upward.

  The high-pressure fuel pump 11 is driven by the rotation of the camshaft, and the plunger is driven downward against the biasing force by the pump cam. When the high-pressure fuel pump 11 is driven, the fuel supply path is opened, and fuel is sent from the high-pressure fuel pipe 30 and the high-pressure delivery 33 to each in-cylinder injection valve 18 (in-cylinder injection valve fuel supply path).

  The intercooler 24 is disposed on the front side of the vehicle of the intake manifold 9, and as shown in FIGS. 3 and 7, the intercooler 24 has a heat exchanging portion 34, and a heat exchanging portion with respect to a lower portion 34 a of the heat exchanging portion 34. An upper portion 34b of 34 is disposed on the rear side (left side in FIG. 7) of the vehicle 1. That is, the intercooler 24 is disposed in a state inclined to the rear side of the vehicle 1.

  When a collision object enters from the front side of the vehicle, the collision object contacts the intercooler 24, and the intercooler 24 is supported by the intake manifold 9 of the engine body 5 so that the inclined state is maintained. For example, as shown in FIGS. 6 and 7, the intake manifold 9 is provided with a projection 9 a that holds the inclined state of the heat exchanging portion 34 of the intercooler 24, and the interfacing object 41 (see FIG. 7) is in contact with it. The cooler 24 is supported by the protrusions 9a, and the inclined state is maintained.

  As shown in FIG. 5, the low pressure delivery 32, the intake port 7, the port injection valve 13, and a part of the low pressure fuel pipe are arranged in the range of the intercooler 24 as viewed from the front of the vehicle 1. Further, the high pressure delivery 33, the in-cylinder injection valve 18, and the high pressure fuel pipe 30 are disposed in the range of the intercooler 24 as viewed from the front of the vehicle 1. The high-pressure fuel pump 11 is disposed in the range of the throttle valve 25 (throttle body) as viewed from the front of the vehicle 1.

  That is, the low pressure delivery 32, the intake port 7, the port injection valve 13, a part of the fuel piping of the port injection valve fuel supply passage, the high pressure delivery 33, the in-cylinder injection valve 18, and the high pressure fuel piping 30 (in-cylinder injection valve fuel). The supply path) is covered by the intercooler 24 in the plane of the engine main body 5 as viewed from the front of the vehicle 1 (range in the vertical direction of the vehicle 1). The high pressure fuel pump 11 is covered with a throttle valve 25 (throttle body) as viewed from the front of the vehicle 1.

  For this reason, when the collision object 41 (refer FIG. 7) approached from the front side of the vehicle 1, the collision object 41 (refer FIG. 7) contact | abuts to the intercooler 24, a port injection valve fuel supply path, a cylinder injection valve fuel supply The collision object 41 (see FIG. 7) does not come into contact with the road. Further, when the collision object 41 (see FIG. 7) contacts the intercooler 24, the intercooler 24 is held by the protrusion 9a, and the movement of the intercooler 24 is restricted by the intake manifold 9, and the intercooler 24 is in an inclined state. Is maintained, and the high-pressure fuel pump 11 and the high-pressure fuel pipe 30 are protected.

  The throttle valve 25 (throttle body) is arranged on the front side of the high-pressure fuel pump 11, and even if the collision object 41 (see FIG. 7) enters, the collision object contacts the throttle valve 25 (throttle body) and the high-pressure fuel. Contact with the pump 11 is prevented. Therefore, even if the collision object 41 (see FIG. 7) enters, the fuel system including the high-pressure fuel pump 11 is not damaged and fuel leakage does not occur.

  The arrangement of the high-pressure fuel pump 11 will be specifically described with reference to FIGS.

  8 shows the situation inside the pump case 45 in which the high-pressure fuel pump 11 is held, FIG. 9 shows the situation seen from the direction of the line IX-IX in FIG. 8, and FIG. 10 shows from the direction of the arrow X in FIG. Shown is the appearance.

  As shown in FIGS. 8 to 10, a camshaft 36 is rotatably supported on the cylinder head 4 of the engine body 5, and the camshaft 36 is mounted from the mounting surface side (right side in FIG. 8) of the cylinder head 4. The end portion is extended outward (extension portion 37). An extending portion 37 of the camshaft 36 is accommodated in the pump case 45, and the high-pressure fuel pump 11 is attached downward to the lower portion of the pump case 45.

  That is, the high-pressure fuel pump 11 is provided with a plunger 38 that is urged upward by the urging spring 39 on the upper side and a discharge portion 40 that discharges fuel as the plunger 38 moves up and down. .

  A pump cam 50 is attached to the extended portion 37 of the camshaft 36, and an upper portion of the plunger 38 of the high-pressure fuel pump 11 is disposed inside the pump case 45 corresponding to the pump cam 50. The upper portion of the plunger 38 is in sliding contact with the pump cam 50, and the plunger 38 is driven downward against the biasing spring 39 by the rotation of the pump cam 50 (rotation of the cam shaft 36).

  When the high-pressure fuel pump 11 is driven, the fuel supply path of the discharge unit 40 is opened, and fuel is sent from the high-pressure fuel pipe 30 and the high-pressure delivery 33 to each in-cylinder injection valve 18.

  As shown in FIGS. 9 and 10, the pump case 45 is provided with a case lid 45a, and a rectangular plate-shaped guide wall member 42 extending along the axial direction of the extending portion 37 is formed on the back side of the case lid 45a. Has been. The guide wall member 42 is provided at a position corresponding to the outer periphery of the camshaft 36 (extending portion 37) on the rear side in the rotational direction of the camshaft 36 (counterclockwise direction in the drawing).

  As the camshaft 36 (extension portion 37) rotates, the lubricating oil of the camshaft 36 scatters and adheres to the guide wall member 42. The lubricating oil adhering to the guide wall member 42 drops and the pump cam 50 and plunger 38 is supplied to the sliding contact portion. Thereby, the lubricity of the pump cam 50 and the plunger 38 which is an operation | movement part can be improved.

  Since the high pressure fuel pump 11 is provided below the camshaft 36 (extension portion 37), the high pressure fuel pump 11 can be disposed near the in-cylinder injection valve 18 (high pressure delivery 33). Compared with the case where a high-pressure fuel pump is provided at the top, the high-pressure fuel pipe 30 can be significantly shortened. That is, it is not necessary to lengthen the high pressure fuel pipe 30.

  That is, mainly as shown in FIG. 5, the intake manifold 9 is disposed in the vehicle width direction of the engine body 5, and the upper end of the intake manifold 9 is disposed above the high-pressure fuel pump 11 in the vehicle height direction. Since the internal injection valve fuel supply path (high pressure delivery 33) is disposed below the intake manifold 9, the high pressure fuel pump 11 can be disposed near the in-cylinder injection valve 18 (in-cylinder injection valve fuel supply path). There is no need to lengthen the fuel line.

  Thereby, the pressure loss with respect to fuel pumping can be reduced, the torque (cam driving torque) for driving the high-pressure fuel pump 11 can be suppressed, and the deterioration of fuel consumption can be prevented.

  The high-pressure fuel pump 11 is attached downward with respect to the pump case 45, and the plunger 38 is urged upward by the urging spring 39, so that the pump cam 50 is arranged on the upper side and presses the plunger 38. .

  When the plunger 38 is driven, the pump cam 50 is pressed upward by the reaction force of the biasing spring 39 for the pump. On the other hand, the body of the camshaft 36 when driving the intake valve of the adjacent cylinder is pressed downward by the spring reaction force of the intake valve.

  For this reason, the camshaft 36 cancels out the force received from the portion (extension portion 37) that drives the high-pressure fuel pump 11 and the force received from the valve spring, thereby reducing the impact sound of the camshaft 36 (extension portion 37). It is configured to be able to.

  As a result, the pump cam 50 is not hit by the plunger 38 from above, and the driving sound can be made quiet.

  In addition, since the driving sound emitted from the high-pressure fuel pump 11 that can be heard through the engine hood is shielded by a structure such as the cylinder head 4, the need for special sound insulation can be reduced.

  Since the engine 2 described above includes the high-pressure fuel pump 11 that sends fuel to the in-cylinder injection valve 18 through the high-pressure delivery 33 below the camshaft 36 (extension portion 37), the high-pressure fuel pump 11 is connected to the in-cylinder injection valve. 18 (high pressure delivery 33) can be arranged near the fuel pipe, and it is not necessary to lengthen the fuel pipe, and even when a collision object enters, fuel such as the high pressure fuel pump 11 and the high pressure fuel pipe 30 is provided by the intake system. It becomes possible to protect the system accurately.

  Therefore, even if the camshaft 36 is extended and the high-pressure fuel pump 11 is disposed below the end of the cylinder head 4, the length of the high-pressure fuel pipe 30 is shortened and the accuracy of the fuel system against the intrusion of the collision object is reduced. Protection is possible.

  INDUSTRIAL APPLICABILITY The present invention can be used in the industrial field of an internal combustion engine of a vehicle capable of accurately protecting a fuel system against the entrance of an impact object.

1 Vehicle 2 Internal Combustion Engine (Engine)
3 Cylinder block 4 Cylinder head 5 Engine body (engine body)
6 Crankshaft 7 Intake Port 8 Intake Valve 9 Intake Manifold 10 Exhaust Valve 11 High Pressure Fuel Pump 12 Combustion Chamber 13 Port Injection Valve 16 Exhaust Port 17 Exhaust Manifold 18 In-Cylinder Injection Valve 21 Intake Pipe 22 Exhaust Pipe 23 Turbocharger 24 Intercooler 25 Throttle valve 26 Exhaust purification catalyst 27 Wastegate valve (WG valve)
DESCRIPTION OF SYMBOLS 30 High pressure fuel piping 31 Low pressure fuel pump 32 Low pressure delivery 33 High pressure delivery 34 Heat exchange part 36 Camshaft 37 Extension part 38 Plunger 39 Energizing spring 40 Discharge part 41 Under bar 42 Guide wall part 45 Pump case 50 Pump cam

Claims (5)

In an internal combustion engine for a vehicle,
One end of the camshaft extends from the cylinder head portion of the main body of the internal combustion engine , and a pump case covers the camshaft.
A high-pressure fuel pump provided in the pump case, disposed under the camshaft and driven by the camshaft;
E Bei and said high-pressure fuel from the fuel pump the inner cylinder and sends the in-cylinder injection valve that directly injects into a combustion chamber of the main body of the internal combustion engine injector fuel supply passage,
The internal combustion engine is arranged with a crankshaft extending in the width direction of the vehicle, and an intake manifold is arranged in the vehicle front side direction of the main body of the internal combustion engine,
The upper end of the intake manifold is disposed above the high-pressure fuel pump in the height direction of the vehicle,
The in-cylinder injection valve fuel supply path is disposed at a lower portion of the manifold,
An internal combustion engine for a vehicle, wherein fuel is sent from the high-pressure fuel pump to the in-cylinder injection valve fuel supply passage . The internal combustion engine of the vehicle according to claim 1 ,
An internal combustion engine for a vehicle, wherein an intercooler is provided on the front side of the intake manifold. The internal combustion engine of the vehicle according to claim 2 ,
An internal combustion engine for a vehicle, characterized in that a throttle valve is disposed between the intake manifold and the intake passage of the intercooler in the front-rear direction of the vehicle and in front of the high-pressure fuel pump. In the internal combustion engine of the vehicle according to claim 2 or claim 3 ,
In the body of the internal combustion engine,
A port injection valve for injecting fuel into an intake port disposed for each cylinder of the main body of the internal combustion engine;
A port injection valve fuel supply path for supplying fuel to the port injection valve,
The internal combustion engine of a vehicle, wherein the upper portion of the intercooler is disposed so as to be higher in the vehicle vertical direction than the port injector fuel supply passage. In the internal combustion engine of the vehicle according to any one of claims 1 to 4 ,
In the pump case,
An internal combustion engine for a vehicle, characterized in that a guide wall member is provided for dripping the lubricating oil inside the cylinder head portion scattered by the rotation of the camshaft and guiding it to the operating portion of the high-pressure fuel pump.

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