JP4411637B2 - Engine and vehicle - Google Patents

Description

  The present invention relates to an engine equipped with a pump and a vehicle equipped with the engine.

  2. Description of the Related Art An increasing number of automobiles employ an in-cylinder direct injection type (direct injection type) engine that directly injects fuel into a combustion chamber during a compression stroke. In this direct injection engine, since the fuel must be injected against the pressure in the combustion chamber, it is necessary to pressurize the fuel to a very high pressure (several MPa to several tens of MPa). Therefore, in addition to the conventional fuel pump (low pressure fuel pump), the fuel supply device for the direct injection engine is provided with a high pressure fuel pump having a function of increasing the fuel pressure.

  Moreover, in an automobile engine currently in use, an overhead camshaft type (OHC type) in which a camshaft is provided above the engine combustion chamber is the mainstream, and above the engine combustion chamber, A valve operating mechanism including an intake valve, an exhaust valve, a camshaft, and the like is disposed. And in order to cover them, a cylinder head cover is provided and the cylinder head upper part of an engine is sealed.

  The high-pressure fuel pump is preferably disposed at a position close to the fuel injection valve. Recently, the high-pressure fuel pump is disposed on the cylinder head cover directly above the camshaft because it employs a type driven by a pump cam provided on the camshaft. Often installed.

  By the way, vibrations and operating noises generated by the high-pressure fuel pump, vibrations of the fuel piping due to the pulsation of the pressurized fuel, and the like are transmitted to the cylinder head cover via the attachment portion of the high-pressure fuel pump. Therefore, the transmitted vibration is amplified by the cylinder head cover to increase the vibration of the engine, or is transmitted to the surface of the cylinder head cover, and the general plate thickness portion of the cylinder head cover acts like a speaker (membrane vibration) and becomes large. Radiation noise may be generated, which has been a big problem in ensuring the quietness of the engine.

  As such a fuel pump mounting structure, conventionally, for example, a mounting hole is formed in a portion of the cylinder head cover facing the camshaft, a plunger portion of the fuel pump is inserted into the mounting hole, and the mounting flange of the fuel pump is used as the cylinder head cover. However, in such a conventional structure, in order to increase the mounting strength of the fuel pump, it is not necessary to increase the wall thickness of the pump mounting portion of the cylinder head cover or to provide a rib on the back surface. In addition, the weight of the cylinder head cover increases, and the fuel pump is attached to the cylinder head cover, so that there is still a problem that vibration of the fuel pump is easily transmitted to the cylinder head cover.

  In order to solve this problem, a bracket (attachment member) is attached to the cylinder head body, the bracket is exposed to the outside of the cylinder head cover through the attachment hole, and the fuel pump is fixed to the exposed bracket. At the same time, there has been proposed a structure in which a space formed by the cylinder head cover and the cylinder head main body is blocked from the outside by a seal member provided between the bracket and the cylinder head cover (see, for example, Patent Documents 1 and 2).

JP 2001-271703 A Japanese Patent No. 3567791

  However, when the fuel pump is attached to the cylinder head body via the bracket as in the conventional structure described in Patent Document 1 or 2, a separate bracket is required, which is disadvantageous in terms of cost and weight. .

  In consideration of the above circumstances, the present invention provides an engine and a vehicle having a compact configuration capable of preventing vibrations of a high-pressure fuel pump from being transmitted to a cylinder head cover as much as possible while suppressing an increase in cost and weight without using a bracket. For the purpose.

The engine according to claim 1 is a plunger type driven by rotation of a pump cam on a camshaft disposed in a space defined by the cylinder head cover, the cylinder head body, and the cylinder head cover and the cylinder head body. A first support portion and a second support portion are formed at least on the pump, and the first support portion is overlapped with a first support portion formed on a peripheral edge of the cylinder head cover, A bolt that penetrates the first support part is supported on the cylinder head body, and the second support part is overlapped with a second support part formed on the cylinder head cover at a position spaced from the periphery of the cylinder head cover. The cylinder head body is supported by a bolt penetrating the second support portion .

The invention according to claim 2 is the engine according to claim 1 , wherein the second support portion of the pump is adjacent to the insertion hole of the spark plug.

A third aspect of the invention is the engine according to the first aspect of the invention, wherein a recess for holding lubricating oil is formed adjacent to the second support portion of the pump.

The invention of claim 4 is an engine of claim 1, the periphery of the cylinder head cover and the cylinder head body attached via a seal member, first the first support portion and the pump of the cylinder head cover The support portion is formed outside the seal member.

According to a fifth aspect of the present invention, there is provided a vehicle equipped with the engine according to any one of the first to fourth aspects, wherein the engine is disposed such that a cylinder axis is inclined, and the first of the pump The support portion is supported above the second support portion of the pump.

  According to the first aspect of the present invention, since the pump is fastened together with the cylinder head cover with a bolt to the cylinder head main body, the pump is not connected to the plate surface portion of the cylinder head cover but via the boss portion of the cylinder head cover. Can be directly fixed to the cylinder head body having high rigidity. Therefore, the resonance of the cylinder head cover due to the vibration of the pump can be suppressed as much as possible, and the noise reduction effect can be obtained.

  Further, since the pump is not attached to the plate surface portion of the cylinder head cover, it is not necessary to make the plate surface portion thick or to provide reinforcing ribs on the back surface of the plate surface portion. Further, since the pump and the cylinder head cover are fastened together with a common bolt to the cylinder head main body, the number of bolts can be saved and an extra bracket need not be used. Accordingly, the pump can be easily attached with a simple and compact structure without causing unnecessary increase in weight and increase in dimension in the height direction. In addition, since the strength of the other parts of the cylinder head cover does not need to be particularly high except for the boss part where the load is applied, the parts other than the boss part can be made of a light material such as resin. The degree of freedom in selecting materials and structures can be expanded.

Further, at least a first support portion and a second support portion are formed on the pump, and the first support portion of the pump is overlapped with the first support portion formed on the periphery of the cylinder head cover and is supported by a bolt. Since the second support portion is overlapped with the second support portion formed on the cylinder head cover at a position separated from the periphery of the cylinder head cover and supported by the bolt, the pump and the cylinder head cover can be firmly coupled to the cylinder head body. .

According to the second aspect of the present invention, since the second support portion of the pump is adjacent to the insertion hole of the spark plug, the second support portion can be easily supported under a highly rigid condition.

According to the invention of claim 3 , since the sliding contact portion between the pump cam and the pump plunger can be sufficiently lubricated by the lubricating oil, there is a concern that poor lubrication may occur even when the engine is started. Absent.

According to the invention of claim 4 , since the first support part of the cylinder head cover and the first support part of the pump are formed outside the seal member that ensures the sealing of the cylinder head cover and the cylinder head body, the cam chamber is hermetically sealed. It becomes easier in terms of retention.

According to the invention of claim 5, the engine arranged to the cylinder axis is inclined, so supporting the first support portion of the pump above the second supporting portion of the pump, according to claim 1 to 4 The significance of the invention can be more fully demonstrated.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic side view showing the overall configuration of a motorcycle (vehicle) equipped with the engine of the embodiment, FIG. 2 is a side view of a main part viewed from the same direction, and FIG. 3 is an enlarged view of the main part. It is a sectional side view. FIG. 4 is an explanatory view of the air flow by providing a relief portion on the bottom wall (partition wall) of the intake chamber to avoid interference with the high-pressure fuel pump, and FIGS. 5 to 9 are diagrams showing configurations of the cylinder head body and the cylinder head cover. It is.

  As shown in FIG. 1, the motorcycle includes a body frame 20, a front wheel 1, a rear wheel 2, an engine 3, a radiator 4, a front fork 5, a bar handle 6, a fuel tank 7, an air cleaner 8, and an element of a fuel supply device. The high-pressure fuel pump 30, the pivot shaft 10, the rear frame 11, the swing arm 12, the power transmission device 13, the seat 14, the exhaust pipe 16, the muffler 17, the front cowl 9, and the like are configured.

  The vehicle body frame 20 has a pair of left and right main frames (frame members) 22 that extend obliquely downward and rearward from a head pipe 21 at the front end. The rear frame 11 is connected to the rear of the main frame 22 on the upper side. A swing arm 12 is coupled to the lower side via a pivot shaft 10 so as to be swingable in the vertical direction. The rear wheel 2 is supported at the rear end of the swing arm 12.

  Further, a bar handle 6 is rotatably supported on the head pipe 21 at the front end of the vehicle body frame 20, and a front fork 5 that is steered by the bar handle 6 is connected to the lower side of the bar handle 6. A front wheel 1 is suspended at the lower end of the fork 5.

  The engine 3 is disposed at the center in the longitudinal direction of the vehicle body and is suspended below the left and right main frames 22 of the vehicle body frame 20. The engine 3 is an in-line four-cylinder engine, which is mounted in a horizontal position with a crankshaft extending horizontally in the vehicle width direction, and the axis of the cylinder 3A above the crankcase is slightly inclined forward. The four exhaust pipes 16 are connected to the exhaust port on the vehicle body front side of the cylinder 3A, and then pass through the lower side of the engine 3 while repeating merging in the middle, and finally are connected to the muffler 17.

  The radiator 4 is disposed at a position substantially the same height as the upper portion of the cylinder 3A in front of the engine 3 with the ventilation surface facing forward. A radiator fan 4A is provided behind the radiator 4. The air cleaner 8 is disposed above the left and right main frames 22, the fuel tank 7 is disposed on the rear side, and the seat 14 on which the rider sits on the rear frame 11 is disposed on the rear side. The power transmission device 13 is disposed on the left side of the rear part of the vehicle body, and the muffler 17 is disposed on the right side of the rear part of the vehicle body along the rear frame 11.

  As shown in FIGS. 2 and 3, the cylinder head 3B of the engine 3 includes a cylinder head body 40 made of aluminum die casting, which is joined to the upper surface of a cylinder block (not shown in FIG. 3) with a bolt 101 with the lower surface aligned. And a cylinder head cover 50 made of the same aluminum die cast provided so as to cover the upper part of the cylinder head main body 40.

  An intake valve (not shown), an exhaust valve (not shown), an intake side camshaft 70, and an exhaust side camshaft 80 (simple in FIG. 6) are provided in the cylinder head 3B including the cylinder head body 40 and the cylinder head cover 50. In particular, a valve operating mechanism comprising the axes 70L and 80L) is provided. The camshafts 70 and 80 on the intake side and the exhaust side are hermetically sealed by aligning the peripheral portion of the lower alignment surface 51 of the cylinder head cover 50 with the upper alignment surface 41 of the cylinder head body 40 via the seal member 60. Is housed inside.

  The high pressure fuel pump 30 is a plunger type that pressurizes fuel sent from a low pressure pump (not shown) by reciprocating the plunger 38 by the rotation of a pump cam 71 provided on the intake side camshaft 70. A pump is provided on a mounting seat 53 projecting from the upper surface of the cylinder head cover 50, with its own axis aligned with the central axis of the intake camshaft 70.

  In this case, as shown in FIGS. 4, 5, 7, and 8, the high-pressure fuel pump 30 is installed at the approximate center in the vehicle width direction of the engine 3, and as shown in FIG. Is disposed on the cylinder head cover 50 so as to enter between the left and right main frames 22. Here, the axis is attached to the cylinder head 3 </ b> B inclined forward, and the axis of the pump 30 is also inclined forward, so that the upper end corner portion of the pump 30 enters the space between the left and right main frames 22. As shown in FIGS. 3 and 5, the high-pressure fuel pump 30 has a cylinder 33 together with the cylinder head cover 50 by means of a bolt 33 penetrating the mounting flange 31 and the boss portions 57 and 58 of the cylinder head cover 50. The head main body 40 is fastened together.

  That is, bolt through holes 57a and 58a corresponding to the screw holes 47a and 48a of the boss portions 47 and 48 on the cylinder head 40 side are formed in the boss portions (cylinder head cover support portions) 57 and 58 of the cylinder head cover 50, respectively. Bolt holes 32 corresponding to the screw holes 47 a and 48 a of the cylinder head 40 and the bolt holes 57 a and 58 a of the cylinder head cover 50 are formed in the mounting flange 31 of the high-pressure fuel pump 30. Then, the bolt 33 is passed through the bolt through hole 32 of the mounting flange 31 and the bolt through holes 57a and 58a of the cylinder head cover 50 in this order from the upper side of the mounting flange 31 and screwed into the screw holes 47a and 48a of the cylinder head body 40. Thus, the high pressure fuel pump 30 is fastened together with the cylinder head body 40 together with the cylinder head cover 50.

  In this case, the mounting flange 31 of the high-pressure fuel pump 30 is provided with a first support portion 31A and a second support portion 31B having bolt through holes 32A and 32B, respectively. The second support portion 31 </ b> B corresponds to a first boss portion (first support portion) 58 formed on the periphery of the cylinder head cover 50, and the second support portion 31 </ b> B is formed on the inner side separated from the periphery of the cylinder head cover 50. This corresponds to the boss portion (second support portion) 57 of the.

  In particular, the second boss portion (second support portion) 57 of the cylinder head cover 50 and the second support portion 31 </ b> B of the high-pressure fuel pump 30 are formed at positions adjacent to the spark plug insertion hole 250. Further, the first boss portion (first support portion) 58 of the cylinder head cover 50 and the first support portion 31A of the high-pressure fuel pump 30 are disposed outside the seal member 60, and the engine 3 to which the pump 30 is attached. Is located above the second boss portion (second support portion) 57 of the cylinder head cover 50 and the second support portion 31B of the high-pressure fuel pump 30.

  Then, the first support portion 31 </ b> A of the mounting flange 31 of the high-pressure fuel pump 30 is overlapped with the first boss portion (first support portion) 58 formed on the peripheral edge of the cylinder head cover 50, and the mounting flange 31 of the high-pressure fuel pump 30. The second support portion 31B is overlaid on a second boss portion (second support portion) 57 formed on the inner side away from the periphery of the cylinder head cover 50, and in this state, the bolt 33 is attached from the upper side of the mounting flange 31. By passing the bolt through holes 32A and 32B of the mounting flange 31 and the bolt through holes 57a and 58a of the cylinder head cover 50 in order and screwing into the screw holes 47a and 48a of the cylinder head body 40, the high pressure fuel pump 30 is Along with the head cover 50, the cylinder head body 40 is attached.

  Further, the position of the mounting bolt 33 in this case is set so as to be opposed diagonally across the central axis 70L of the intake camshaft 70 as shown in FIG. This is because it is effective in avoiding interference between the inner built-up portion for forming the boss portions 47, 48, 57, and 58 and the pump cam 71 as much as possible. Note that the position and number of the mounting bolts 33 may be arbitrarily changed as long as the high-pressure fuel pump 30 can be mounted in a balanced manner. For example, the two may be arranged on a line orthogonal to the central axis 70 </ b> L of the intake side camshaft 70, not on the diagonally opposed position.

  By being fastened with the bolts 33 in this way, the sealing member 60 interposed between the mating surfaces 41 and 51 of the cylinder head cover 50 and the cylinder head main body 40 is crushed by the fixing force and is brought into close contact with the cam chamber. Maintain 52 airtightness.

  As shown in FIG. 10, the end surface 58 c of the boss portion 58 for fastening the bolt on the cylinder head cover 50 side has a fitting groove 51 a of the seal member 60 so that the crushing margin of the seal member 60 is appropriate. It is slightly higher than the surface 51 toward the counterpart boss portion (the boss portion of the cylinder head body 40), and the end surfaces of the boss portions 47, 48, 57, 58 are in direct pressure contact with each other.

  Also, in the cylinder head 3B, as shown in FIG. 3, an oil bath (holds the lubricating oil) for storing the lubricating oil at a level at which at least a part of the sliding contact surface of the pump cam 71 can be constantly immersed. (Concave part) 79 is provided. As shown in FIGS. 6 and 9, the oil bath 79 includes U-shaped ribs 49 and 59 that are continuous with the boss portion 47 of the cylinder head body 40 and the second boss portion 57 of the cylinder head cover 50. The rigidity of the boss portions 47 and 57 is also increased by the presence of the ribs 49 and 59.

  4 (a) and 4 (b), the bottom surface between the main frames 22 is provided between the left and right main frames 22 in which the air cleaner 8 connected to the intake port of the engine 3 is disposed on the upper side. As a result, the intake chamber 122 communicating with the inlet of the air cleaner 8 is formed. The main frame 22 defining the left and right side portions of the intake chamber 122 is provided inside the pair of left and right air ducts 110 extending forward of the vehicle body. The intake air inlets 112 for introducing the traveling wind (air) F1 taken into the intake chamber 122 are respectively opened. Note that the inlet of the air cleaner 8 is connected to an intake outlet 126 opened on the upper surface of the intake chamber 122.

  In addition, the partition wall 120 that defines the bottom surface of the intake chamber 122 has a deformed portion 124 whose lower surface (back surface) is a concave portion 124 a and whose upper surface is a convex portion 124 b that protrudes into the intake chamber 122. The upper end corner of the high-pressure fuel pump 30 is housed in a recess 124 a on the lower surface side of the deformed portion 124 located above the high-pressure fuel pump 30. By accommodating at least a part of the high-pressure fuel pump 30 in the recess 124a on the bottom surface of the intake chamber 122 in this way, the high-pressure fuel pump 30 is arranged in the vehicle width direction of the engine 3 in spite of a very narrow space. The central part can be disposed without interfering with the body frame 20.

  Further, the convex portion 124b on the upper surface side of the deformable portion 124 is located at a location where the air introduced from the intake inlet 112 hits, and the convex portion 124b is shown in FIGS. 4 (b) and 4 (c). As described above, an inclined surface 124c for guiding the air F2 introduced from the intake inlet 112 to the inlet of the air cleaner 8 is provided. The inclined surface 124c is inclined upward and faces the intake inlet 112. The intake inlet 112 only needs to be formed on the upper surface of the intake chamber 122 and the wall surface excluding the convex portion 124b.

  According to the above configuration, the high-pressure fuel pump 30 can be compactly disposed in a narrow space without interfering with the pair of left and right main frames (frame members) 22 extending rearward from the head pipe 21. Further, since the high pressure fuel pump 30 is attached to the cylinder head 3B so that at least a part is located between the left and right main frames 22, the influence of external force on the high pressure fuel pump 30 and the influence of high pressure water during car washing In addition to being eliminated as much as possible, radiation noise from the high-pressure fuel pump 30 can be reduced. In addition, since the high-pressure fuel pump 30 is disposed at the center between the left and right main frames 22, the weight balance in the left-right direction can also be kept good.

  An intake chamber 122 having an intake outlet 126 on the upper surface is formed between a pair of left and right main frames 22 extending rearward from the head pipe 21, and a convex portion 124 b protruding into the intake chamber 122 is formed on the bottom surface of the intake chamber 122. Since the intake inlet 112 for taking air into the intake chamber 122 is provided on the wall surface (on the main frame 22) excluding the upper surface of the intake chamber 122 and the convex portion 124b, the air taken into the intake chamber 122 from the intake inlet 112 is provided. Can be smoothly guided to the intake outlet 126 while being guided by the convex portion 124b. Therefore, the drainage effect and rectification effect of the supercharging traveling wind can be achieved by the convex portion 124b. Moreover, since the convex part 124b is formed in the upper part of the high pressure fuel pump 30, a part (upper corner) of the high pressure fuel pump 30 can be accommodated in the concave part 124a on the back surface of the convex part 124b. A space advantage in arranging the pump 30 can be obtained. Further, since the convex portion 124b is at the center in the vehicle width direction, the air taken into the intake chamber 122 can be guided with good balance when being guided to the intake outlet 126.

  In the present embodiment, since the intake inlets 112 are formed at least on the left and right sides in the vehicle body width direction, air can be taken into the intake chamber 122 from the left and right directions in a balanced manner. Can be smoothly guided to the intake outlet 126 by the convex portion 124b. In particular, since the convex portion 124b is provided with an inclined surface 124c that is inclined upward, air can be guided to the intake outlet 126 more smoothly. Further, since the intake inlet 112 is formed toward the inclined surface 124c of the convex portion 124b, the air taken into the intake chamber 122 is applied to the convex portion 124b and directed to the intake outlet 126 by the guide of the inclined surface 124c. It is possible to provide a good rectifying effect.

  In the present embodiment, the high pressure fuel pump 30 is fastened together with the cylinder head cover 50 to the cylinder head main body 40 with the bolts 33, so that the cylinder head cover is different from the fuel pump fixed to the plate surface portion of the cylinder head cover 50. The high-pressure fuel pump 30 can be fixed almost directly to the highly rigid cylinder head body 40 through the 50 boss portions 57 and 58. Therefore, resonance of the cylinder head cover 50 due to vibration of the high-pressure fuel pump 30 can be suppressed as much as possible, and a noise reduction effect can be obtained.

  Further, since the high-pressure fuel pump 30 is not attached to the plate surface portion of the cylinder head cover 50, it is not necessary to make the plate surface portion thick or provide a reinforcing rib on the back surface of the plate surface portion. As a result, a compact structure can be realized, and unnecessary weight increase and height dimension increase can be suppressed. In addition, except for the boss portions 57 and 58 that are loaded, it is not necessary to increase the strength of other portions of the cylinder head cover 50. Therefore, portions other than the boss portions 57 and 58 are made of a light material such as resin. In addition, the degree of freedom in selecting the material and structure of the cylinder head cover 50 can be expanded. For example, only the portions of the boss portions 57 and 58 can be made of metal, and the other portions can be made by insert molding with resin.

  Further, in the present embodiment, the sliding contact portion between the pump cam 71 and the plunger 38 of the high-pressure fuel pump 30 can be sufficiently lubricated by the lubricating oil accumulated in the oil bath 79. There is no worry of poor lubrication.

  In the present embodiment, the first support portion 31 </ b> A and the second support portion 31 </ b> B are provided on the mounting flange 31 of the high-pressure fuel pump 30, and the first support portion 31 </ b> A of the pump 30 is disposed on the periphery of the cylinder head cover 50. The formed first boss portion (first support portion) 58 is overlapped with a bolt 33 and fastened with a bolt 33, and the second support portion 31 </ b> B of the pump 30 is formed on the cylinder head cover 50 at a position separated from the periphery of the cylinder head cover 50. Since it overlaps with the 2nd boss | hub part (2nd support part) 57 and it fastens with the volt | bolt 33, the pump 30 and the cylinder head cover 50 can be combined with the cylinder head main body 40 still more firmly.

  In addition, since the second support portion 31B of the high-pressure fuel pump 30 is provided adjacent to the insertion hole 250 of the spark plug, the second support portion 31B can be easily supported under a high rigidity condition. Furthermore, the first boss portion (first support portion) 58 of the cylinder head cover 50 and the first support portion 31A of the pump 30 are formed outside the seal member 60 that ensures airtightness between the cylinder head cover 50 and the cylinder head body 40. Therefore, the cam chamber 52 is easy to keep airtight.

  In the above-described embodiment, the example in which the air duct 110 different from the vehicle body frame 20 is extended to the front of the vehicle body has been described. However, as illustrated in FIG. 11, the internal space of the vehicle body frame 20B is formed on both sides of the head pipe 21. The present invention can also be applied to the case where the duct passage 130 is used. In that case, intake air inlets (not shown) are opened in the left and right front portions or left and right side portions of the intake chamber 122, so that traveling wind enters from there toward the convex portion 124 b in the intake chamber 122. That's fine.

  Moreover, although the case where the high pressure fuel pump 30 was attached was demonstrated in the said embodiment, this invention is applicable also when attaching another pump.

  In the above-described embodiment, the case where the high-pressure fuel pump 30 is attached to the single-row multi-cylinder engine 3 has been described. The present invention can also be applied when a high-pressure fuel pump is attached to a V-shaped engine. In that case, a high-pressure fuel pump is attached to the cylinder head cover of the forwardly inclined cylinder row.

1 is a schematic side view showing an overall configuration of a motorcycle equipped with an engine of an embodiment of the present invention. FIG. 2 is a side view of the main part of the motorcycle as viewed from the same direction as in FIG. 1. FIG. 3 is a side cross-sectional view showing an enlarged main part configuration of FIG. 2. (A) is a plan view of the main frame (a pair of left and right frame members) of the motorcycle as viewed from below, (b) is a sectional view taken along the arrow IVb-IVb in (a), and (c) is a traveling wind. It is a schematic explanatory drawing which shows the flow of. It is a perspective view which shows the structure of the cylinder head part of the engine mounted in the said motorcycle. It is a disassembled perspective view of the cylinder head. It is a schematic plan view of the cylinder head. It is a side view of the cylinder head. It is the top view seen from the mating face side of the cylinder head cover which comprises the cylinder head. It is an expansion perspective view of the boss | hub part for the bolt fastening of the cylinder head cover. It is a figure similar to Fig.4 (a) in other embodiment of this invention.

Explanation of symbols

3 Engine 3A Cylinder 3B Cylinder head 8 Air cleaner 20 Body frame 21 Head pipe 22 Main frame (a pair of left and right frame members)
30 High Pressure Fuel Pump 31 Mounting Flange 31A First Support Portion 31B Second Support Portion 33 Bolt 38 Plunger 40 Cylinder Head Body 47, 48 Boss Portion 57 Second Boss Portion (Second Support Portion)
58 1st boss | hub part (1st support part)
50 Cylinder head cover 70 Intake side camshaft 71 Pump cam 79 Oil bath (recess for holding lubricating oil)
112 Intake inlet 120 Bulkhead 122 Intake chamber 124a Concavity 124b Convex portion 124c Guide wall 126 Inlet outlet

Claims (5)

A cylinder head cover;
A cylinder head body;
A plunger-type pump driven by rotation of a pump cam on a camshaft disposed in a space defined by the cylinder head cover and the cylinder head body,
Forming at least a first support and a second support on the pump;
The first support portion is overlapped with the first support portion formed on the periphery of the cylinder head cover, and is supported on the cylinder head body with a bolt penetrating the first support portion.
The second support portion is overlapped with the second support portion formed on the cylinder head cover at a position separated from the periphery of the cylinder head cover, and supported by the cylinder head body with a bolt penetrating the second support portion . An engine characterized by that. The engine according to claim 1,
An engine characterized in that a second support portion of the pump is adjacent to an insertion hole of a spark plug . The engine according to claim 1,
An engine characterized in that a recess for holding lubricating oil is formed adjacent to the second support portion of the pump . The engine according to claim 1,
The cylinder head cover and the periphery of the cylinder head body are coupled via a seal member, and the first support part of the cylinder head cover and the first support part of the pump are
An engine formed outside the seal member . A vehicle equipped with the engine according to any one of claims 1 to 4,
The engine is disposed such that the cylinder axis is inclined,
  A vehicle characterized in that the first support portion of the pump is supported above the second support portion of the pump.

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