Vehicle-mounted internal combustion engine
By setting protrusions on the cylinder head cover of the vehicle's internal combustion engine, the problem of damage to fuel system components during vehicle collisions is solved, and the protection effect of the fuel supply device is improved without increasing space.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- TOYOTA JIDOSHA KK
- Filing Date
- 2025-10-31
- Publication Date
- 2026-06-12
AI Technical Summary
In the prior art, the fuel system components of an on-board internal combustion engine are easily damaged in a vehicle collision, and the installation of protective devices increases the space requirements for installation.
Design an on-board internal combustion engine with two cylinder banks and a cylinder head cover. The cylinder head cover is provided with a protrusion to protect the fuel supply device. The protrusion is on the outside of the fuel supply device and can contact the side beam first in the event of a collision to avoid direct contact damage.
Without increasing the mounting space, it effectively protects the fuel supply device, reduces damage caused by collisions, and improves the rigidity and impact resistance of the device.
Smart Images
Figure CN122190937A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to vehicle-mounted internal combustion engines. Background Technology
[0002] Japanese Patent Application Publication No. 2004-245147 discloses a structure for a protective device that protects fuel system components from damage during a vehicle collision. The protective device is bolted to a boss on the engine block, covering fuel system components such as fuel lines and fuel injection valves located near the internal combustion engine. This protective device absorbs the loads exerted on the fuel system components due to a vehicle collision, thereby reducing the load applied to the fuel system components. Summary of the Invention
[0003] The aforementioned protective device is installed to cover the fuel system components. Therefore, the space that must be ensured for mounting the internal combustion engine increases the amount of space required for the protective device to be located around the main body of the internal combustion engine.
[0004] An on-board internal combustion engine for solving the above-mentioned problems includes two cylinder banks: a first cylinder bank having a plurality of cylinders arranged along the rotation axis of the crankshaft; and a second cylinder bank having a plurality of cylinders arranged along the rotation axis of the crankshaft. This on-board internal combustion engine has an intake manifold on the outside of each cylinder bank. Each cylinder bank has a cylinder head cover with a fuel supply device for supplying fuel to the plurality of cylinders. The rotation axis of the crankshaft is defined as the longitudinal direction of the on-board internal combustion engine. The left-right direction is defined as a direction parallel to the horizontal plane (i.e., the reference plane) in the vehicle's mounted posture and orthogonal to the longitudinal direction. A protrusion is provided on the cylinder head cover, located outside the left-right direction than the portion of the fuel supply device protruding from the cylinder head cover.
[0005] Based on the aforementioned vehicle-mounted internal combustion engine, it is possible to protect fuel system components while suppressing the increase in the space required for installation. Attached Figure Description
[0006] The features, advantages, and technical and industrial significance of exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals denote the same parts, wherein:
[0007] Figure 1 It is a schematic top view of a vehicle equipped with an engine as one embodiment of an on-board internal combustion engine;
[0008] Figure 2 Viewed from the rear of the engine Figure 1 Rear view of the engine;
[0009] Figure 3 View from above the engine Figure 1 A top view of the right cylinder bank of the engine;
[0010] Figure 4 It is Figure 2 An enlarged view of the portion enclosed by a single-dotted line;
[0011] Figure 5 From Figure 4 Observe the direction of arrow 5 shown in the single-dotted line. Figures 2 to 4 A top view showing the protrusion;
[0012] Figure 6 From and Figure 5 View the top view of the protrusion of the modified example from the same direction. Detailed Implementation
[0013] The following is for reference Figures 1 to 5 An engine 10, which is one embodiment of an on-board internal combustion engine, will be described.
[0014] The structure of vehicle 90
[0015] Figure 1 This is a schematic top-view diagram of vehicle 90, showing the vehicle equipped with engine 10, as viewed from above. Figure 1 In the diagram, arrows indicate the forward and backward directions and the left and right directions of the vehicle.
[0016] like Figure 1 As shown, engine 10 is mounted on the front side of vehicle 90. Figure 1 As shown, the direction orthogonal to the front-rear direction of vehicle 90 and horizontal is the left-right direction. When facing the front of vehicle 90, the direction closer to the right is the right side, and the direction closer to the left is the left side.
[0017] Engine 10 has a crankshaft 17 and eight cylinders, #1 to #8. Figure 1 In the diagram, crankshaft 17 and the eight cylinders #1 to #8 are represented by dashed lines. Figure 1 The single-dotted line shown represents the rotation axis 16 of the crankshaft 17. The engine 10 has two cylinder banks: a right-side cylinder bank 31 and a left-side cylinder bank 32. The engine 10 is a V-type engine. The two cylinder banks are arranged at a V-angle when viewed axially from the rotation axis 16. The engine 10 is a longitudinally mounted V-type engine. That is, the engine 10 is mounted on the vehicle 90 such that the axial direction of the rotation axis 16 of the crankshaft 17 is aligned with the longitudinal direction of the vehicle 90.
[0018] In the engine 10, the direction along the axis of rotation 16 of the crankshaft 17 is the longitudinal direction. A reference plane is provided in the engine 10. The reference plane of the engine 10 is set to coincide with the horizontal plane when the engine 10 is mounted in the vehicle. The left-right direction of the engine 10 is parallel to the reference plane and orthogonal to the longitudinal direction of the engine 10.
[0019] like Figure 1 As shown, in vehicle 90, the longitudinal direction of vehicle 90 is consistent with the longitudinal direction of engine 10. For example... Figure 1 As shown, in vehicle 90, the left-right direction of vehicle 90 is consistent with the left-right direction of engine 10.
[0020] On the right cylinder bank 31, four cylinders, #1, #3, #5, and #7, are arranged axially along the rotation axis 16 of the crankshaft 17. On the left cylinder bank 32, four cylinders, #2, #4, #6, and #8, are arranged axially along the rotation axis 16 of the crankshaft 17. The right cylinder bank 31 is the first cylinder bank in the engine 10. The left cylinder bank 32 is the second cylinder bank in the engine 10.
[0021] Engine 10 has two intake manifolds 22 and one exhaust manifold 23. Engine 10 is a so-called external cylinder bank intake V-type engine. Intake manifolds 22 are respectively installed on the outside of the right cylinder bank 31 and the left cylinder bank 32 of engine 10. Intake air is introduced from the outside into the right cylinder bank 31 and the left cylinder bank 32 via the intake manifolds 22 connected to each cylinder bank.
[0022] The right cylinder bank 31 and the left cylinder bank 32 of the engine 10 are equipped with exhaust manifolds 23 inside the cylinder banks. Exhaust from the right cylinder bank 31 and the left cylinder bank 32 is discharged to the outside through the exhaust manifolds 23 connected to the two cylinder banks.
[0023] like Figure 1 As shown, the vehicle 90 has a crossbeam 92 and two side beams 91, namely a right side beam 91R and a left side beam 91L, which serve as the frame components of the vehicle 90.
[0024] A crossbeam 92 is positioned in front of the engine 10. The crossbeam 92 extends considerably in the left-right direction of the vehicle 90. A right-side beam 91R is positioned to the right of the engine 10. A left-side beam 91L is positioned to the left of the engine 10. Both side beams 91 extend considerably in the front-rear direction of the vehicle 90. The front end of the right-side beam 91R connects to the right end of the crossbeam 92. The front end of the left-side beam 91L connects to the left end of the crossbeam 92.
[0025] The engine 10 is surrounded by a crossbeam 92 and two side beams 91 in the front, left and right directions.
[0026] Structure of Engine 10
[0027] Figure 2 This is a rear view of the engine 10 viewed from the rear side.
[0028] like Figure 2 As shown, the engine 10 includes a cylinder block 11, two cylinder heads 20, and two cylinder head covers 21. The cylinder block 11 includes a crankcase 12 and two cylinders 13 located on the upper part of the crankcase 12. The vertical direction of the engine 10 is orthogonal to both the longitudinal and lateral directions of the engine 10.
[0029] exist Figure 2 The cylinder arrangement on the right side of the cylinder has four cylinders: #1, #3, #5, and #7. Figure 2 The left-hand cylinder arrangement 13 contains four cylinders: #2, #4, #6, and #8. Each cylinder forms the lower part of the combustion chamber, where the fuel-air mixture is burned. The fuel in engine 10 is, for example, gasoline.
[0030] Cylinder heads 20 are mounted on the upper part of each cylinder bank 13. By combining the cylinder banks 13 and cylinder heads 20 into a group, four combustion chambers are formed in each cylinder bank.
[0031] A cylinder head cover 21 is installed on the upper part of each cylinder head 20. Each cylinder bank of the right cylinder bank 31 and the left cylinder bank 32 is equipped with a cylinder arrangement 13, a cylinder head 20 and a cylinder head cover 21.
[0032] like Figure 2 As shown, each cylinder in the cylinder arrangement 13 houses a piston 14 and a connecting rod 15. The connecting rod 15 is connected to the crankshaft 17 housed in the crankcase 12.
[0033] Each cylinder head 20 has an intake passage 24 and an exhaust passage 25. Each cylinder head 20 also has an ignition device (not shown), an intake valve, and an exhaust valve.
[0034] Intake passage 24 is Figure 1 Each intake manifold 22 shown faces the end of one of the four combustion chamber branches in each cylinder arrangement 13. The aforementioned end of the intake passage 24 is connected to the cylinder head 20. The intake passage 24 directs intake air flowing in from the outside via the intake manifold 22 into each combustion chamber of each cylinder arrangement 13. The aforementioned end of the intake passage 24 communicates with the combustion chamber. The opening of the intake passage 24 into the combustion chamber is opened and closed by an intake valve.
[0035] Exhaust passage 25 is Figure 1The exhaust manifold 23 shown faces the ends of the four combustion chamber branches in each of the cylinder arrangements 13. The aforementioned ends of the exhaust passage 25 are connected to the cylinder head 20. The exhaust passage 25 guides exhaust gas from each combustion chamber of each cylinder arrangement 13 into the exhaust manifold 23. The aforementioned ends of the exhaust passage 25 communicate with the combustion chambers. The openings of the exhaust passage 25 leading to the combustion chambers are opened and closed by exhaust valves.
[0036] Structure of fuel supply device 28
[0037] like Figure 2 As shown, a fuel supply device 28 is installed on each cylinder head cover 21. The fuel supply device 28 consists of an injector 27 and a delivery pipe 26. The delivery pipe 26 stores fuel supplied from the fuel tank. The delivery pipe 26 is a passage for supplying the high-pressure fuel stored inside to the injector 27. The injector 27 directly injects the high-pressure fuel in the delivery pipe 26 and supplies it to the combustion chamber.
[0038] Figure 3 This is a top view of the right-side cylinder bank 31, viewed from above the engine 10. (Example) Figure 3 As shown, four injectors 27 are installed on the cylinder head cover 21 of the right-side cylinder bank 31 to inject fuel into the combustion chambers of cylinders #1, #3, #5, and #7. A delivery pipe 26 is installed on the cylinder head cover 21, extending from the rear end of the engine 10 towards the front side of the engine 10. The delivery pipe 26 supplies fuel to the four injectors 27.
[0039] Figure 4 yes Figure 2 An enlarged view of the portion enclosed by a single-dotted line. (See example...) Figure 4 As shown, the injector 27 is inserted into the cylinder head 20 from the cylinder head cover 21. The injector 27 is fixed to the cylinder head cover 21.
[0040] The delivery pipe 26 protrudes upward from the cylinder head cover 21. More specifically, the delivery pipe 26 protrudes outward in the left-right direction of the engine 10 and upward in the vertical direction of the engine 10. The delivery pipe 26, as part of the fuel supply device 28, protrudes from the cylinder head cover 21.
[0041] Structure of protrusion 50
[0042] like Figure 4 As shown, a protrusion 50 is provided on the cylinder head cover 21. The protrusion 50 is located to the right of the position of the delivery pipe 26.
[0043] Figure 5 From Figure 4 The top view of protrusion 50 is shown in the direction of arrow 5, indicated by a single-dotted line. Figure 4 and Figure 5As shown, the protrusion 50 has a boss 51 and three ribs 52. That is, the protrusion 50 is a ribbed boss with ribs 52 on the boss 51. The boss 51 is cylindrical.
[0044] Rib 52 extends radially outward from the side of boss 51. The end of rib 52 is located on cylinder head cover 21. The three ribs 52 are arranged with boss 51 as the center, at a position where the central angle between each rib 52 and the other is 120 degrees.
[0045] like Figure 4 As shown, each rib 52 is positioned near the front of the boss 51, extending from the root of the boss 51 to its foremost position. The boss 51 is positioned vertically relative to the engine 10. Figure 4 The boss 51 is tilted to the right. The higher the boss 51 is, the more it is positioned within the... Figure 4 On the right side of the middle.
[0046] In addition, such as Figure 4 As shown, the rightmost part of protrusion 50 is the front end of boss 51. Figure 4 and Figure 5 As shown, the three ribs 52 of the protrusion 50 are composed of an upper rib 52B and two lateral ribs 52A. Figure 4 As shown, the two ribs 52 extending from the side of the boss 51 toward the bottom of the engine 10 are side ribs 52A.
[0047] On the other hand, the rib 52 extending to the left from the side of the boss 51 along the left-right direction of the engine 10 is the upper rib 52B. The upper rib 52B is provided on a part of the side of the boss 51, namely the upper surface 53 of the boss. The upper surface 53 of the boss is the part of the side of the boss 51 located on the uppermost side in the vertical direction of the engine 10.
[0048] like Figure 4 As shown, the upper surface 54 of the rib is the surface on the upper side of the upper rib 52B. The upper surface 54 of the rib is parallel to the reference plane of the engine 10. That is, the upper rib 52B extends from the upper surface 53 of the boss along the reference plane to the end of the upper rib 52B connected to the cylinder head cover 21.
[0049] Positional relationship between delivery pipe 26 and protrusion 50
[0050] like Figure 4 As shown, the protrusion 50 is positioned to the right of the cylinder head cover 21, relative to the delivery pipe 26 that protrudes from the cylinder head cover 21. Figure 4 The imaginary plane indicated by the double-dotted line is an imaginary plane passing through the rightmost position in the delivery pipe 26 and orthogonal to the left-right direction of the engine 10. For example... Figure 4As shown, a portion of the protrusion 50 protrudes to the right beyond the imaginary plane. That is, the protrusion 50 is located closer to the right than the conveying pipe 26. Figure 4 The position on the right side of the text.
[0051] Furthermore, the description of the protrusion 50 above remains valid even if the right cylinder bank 31 is replaced with the left cylinder bank 32. In this case, the left and right descriptions in the above description should be appropriately replaced by swapping their left and right positions. For example, the protrusion 50 of the cylinder head cover 21 provided on the left cylinder bank 32 is located on the left side of the engine 10, outside the engine 10 in the left-right direction, further to the left than the delivery pipe 26.
[0052] The function of this implementation method
[0053] When a collision occurs with vehicle 90, a component located around engine 10, namely side beam 91, may be pressed toward engine 10. When side beam 91 is pressed into engine 10 due to a collision, it may come into contact with the portion of fuel supply device 28 exposed from cylinder head cover 21, namely delivery pipe 26.
[0054] like Figure 4 As shown, the engine 10 has a protrusion 50 on its outer side in the left-right direction, which is closer to the delivery pipe 26 than the engine 10. Therefore, when the side beam 91, which is arranged around the engine 10, is pressed towards the engine 10 due to an impact, the side beam 91 contacts the protrusion 50 first before contacting the delivery pipe 26. In this way, the protrusion 50 can be used to inhibit the delivery pipe 26 from contacting the side beam 91. In addition, the protrusion 50 does not cover the entire delivery pipe 26. Therefore, the protrusion 50 can achieve the above-mentioned function with a relatively small structure.
[0055] Effects of this implementation method
[0056] (1) According to the engine 10, the delivery pipe 26 can be protected while suppressing the increase in space required for mounting.
[0057] (2) The protrusion 50 of the engine 10 is a ribbed boss with ribs 52 extending radially outward toward the side of the cylindrical boss 51. The front end of the boss 51 in the protrusion 50 of the engine 10 is located on the outermost side in the left-right direction of the engine 10.
[0058] By providing ribs 52 on the side of the boss 51, the rigidity of the boss 51 can be improved. The engine 10 has a ribbed boss as a protrusion 50 whose rigidity is improved by the ribs 52.
[0059] According to the engine 10, even if the vehicle 90 is subjected to a strong impact due to a collision, the damage to the delivery pipe 26 can be suppressed.
[0060] (3) The ribs 52 of the protrusion 50 of the engine 10 are arranged at equal angles with the boss 51 as the center.
[0061] By arranging three or more ribs 52 at equal angles, the protrusion 50 exhibits high rigidity regardless of the direction of the load input due to collision. According to the engine 10, the protrusion 50, which exhibits high rigidity regardless of the direction of load input, can suppress damage to the delivery pipe 26.
[0062] (4) The protrusion 50 of the engine 10 has three ribs 52. When multiple ribs 52 are arranged at equal angles, the minimum number of ribs 52 that can make the protrusion 50 exhibit high rigidity relative to loads input from any direction is three. The protrusion 50 of the engine 10 has high rigidity against loads from any direction with the minimum number of ribs 52. By reducing the number of ribs 52, the protrusion 50 can be miniaturized.
[0063] According to the engine 10, the increase in weight caused by the protrusion 50 can be suppressed.
[0064] (5) The boss 51 of the engine 10 is inclined such that the upper part of the engine 10 in the vertical direction of the engine 10, which is orthogonal to both the front-rear direction and the left-right direction of the engine 10, is located further out in the left-right direction. In the engine 10, the upper rib 52B of the upper surface 53 of the boss 51, which is provided on the side of the boss 51 in the vehicle mounting position, extends from the upper surface 53 of the boss along the reference plane to the end of the upper rib 52B.
[0065] In the engine 10, an upper rib 52B provided on the upper surface 53 of the boss 51 on the side is configured to fill the gap above the boss 51 in the vehicle-mounted position and provide horizontal support. According to the engine 10, the rigidity of the protrusion 50 can be improved in the event that the boss 51 deforms in the left-right direction due to the load acting on the protrusion 50 in the left-right direction.
[0066] According to the engine 10, the delivery pipe 26, which is located inside the engine 10 in the left-right direction, can be protected more effectively.
[0067] Change Example
[0068] This embodiment can be modified as follows. This embodiment and the following modifications can be combined with each other to implement them within the scope of technical non-inconsistency.
[0069] The shape of the boss 51 is not limited to a cylindrical shape. The shape of the boss 51 can also be generally cylindrical. For example, the shape of the boss 51 can also be generally cylindrical, generally square, or generally prismatic. The rib 52 can also be configured to connect with other bosses provided on the engine 10. For example, the rib 52 can also be a rib that connects the boss 51 to other adjacent bosses.
[0070] The protrusion 50 may have more than three ribs 52. The protrusion 50 may have three or more ribs 52. The protrusion 50 is not limited to having more than three ribs 52. The protrusion 50 may also have one or two ribs 52. The protrusion 50 may also be a structure with only a boss 51 and no ribs 52.
[0071] When three or more ribs 52 are provided, the size of the central angle between each rib 52 can be changed according to the number of ribs 52 on the protrusion 50, in a manner in which each rib 52 is arranged at equal angles. By arranging three or more ribs 52 at equal angles with the boss 51 as the center, the effect described above (3) can be obtained.
[0072] The ribs 52 of the protrusion 50 may also be arranged at equal angles, not centered on the boss 51. Considering the direction of the load that is likely to be generated by a collision of the vehicle 90, the ribs 52 may also be arranged in a position that is more likely to increase rigidity relative to the load.
[0073] Ribs 52 may also extend from the root of boss 51 to the front end of boss 51. Protrusion 50 is a ribbed boss of boss 51 having ribs 52. Protrusion 50 may also not be a ribbed boss. For example, protrusion 50 may also be a shape that only incorporates the rib portion of protrusion 50 and does not have a boss 51.
[0074] As an example, Figure 6 This indicates that the above-mentioned modified example has been applied to protrusion 60. Figure 6 and Figure 5 Similarly, it is from the same Figure 5 View the top view of protrusion 60 from the same direction. Protrusion 60, like protrusion 50, has three ribs 52: a top rib 52B and two side ribs 52A. Protrusion 60 is shaped such that the three ribs 52 extend radially from the center 61 of protrusion 60.
[0075] The central portion 61 is smaller than the boss 51. By making the central portion 61 smaller than the boss 51, the weight of the protrusion 60 can be reduced. According to the protrusion 60, the effects of (1) to (5) above can be achieved while suppressing the increase in weight of the protruding portion.
[0076] Engine 10 may not be a longitudinally mounted V-type engine. Engine 10 may also be a transversely mounted V-type engine in which the axis of rotation of crankshaft 17 is aligned with the left-right direction of vehicle 90. In this case, when the crossbeam 92 positioned in front of engine 10 is pressed toward engine 10 due to a collision with vehicle 90, the crossbeam 92 contacts the protrusion 50 prior to the delivery pipe 26. According to this protrusion 50, the effect described above (1) can be achieved when vehicle 90 collides from the front.
[0077] Engine 10 is not limited to a V-type engine. Engine 10 may also be, for example, an inline engine or a horizontally opposed engine. It can be applied to situations where the fuel system components exposed from the cylinder head cover 21 in the vehicle mounting position are positioned to contact components located around the engine 10 during a collision with the vehicle 90. For example, in the case of a horizontally opposed engine mounted longitudinally, the fuel system components protrude laterally from the cylinder head cover in the horizontally opposed engine. In this case, by setting the protrusion 50 to extend to a position further outward in the left-right direction than the exposed portion of the fuel system components, the effect described above (1) can be obtained.
Claims
1. An on-board internal combustion engine comprising two cylinder banks: a first cylinder bank having a plurality of cylinders arranged along the rotation axis of a crankshaft; and a second cylinder bank having a plurality of cylinders arranged along the rotation axis of the crankshaft, wherein each cylinder bank has an intake manifold on its outer side, wherein, Each cylinder bank is equipped with a cylinder head cover, and the cylinder head cover is fitted with a fuel supply device for supplying fuel to the plurality of cylinders. When the rotation axis direction of the crankshaft is set as the front-rear direction of the vehicle internal combustion engine, and the direction parallel to the horizontal plane (i.e., the reference plane) and orthogonal to the front-rear direction is set as the left-right direction of the vehicle internal combustion engine, the rotation axis direction of the crankshaft is defined as the rotation axis direction of the engine. The cylinder head cover is provided with a protrusion located on the outer side in the left-right direction than the portion of the fuel supply device that protrudes from the cylinder head cover.
2. The vehicle-mounted internal combustion engine according to claim 1, wherein, The protrusion is a ribbed boss with ribs extending radially outward toward the side of the cylindrical boss. The front end of the protrusion in the protrusion is located on the outermost side in the left-right direction.
3. The vehicle-mounted internal combustion engine according to claim 2, wherein, The ribbed boss has three or more ribs, and each rib is arranged at equal angles around the boss.
4. The vehicle-mounted internal combustion engine according to claim 3, wherein, The ribbed boss has three ribs.
5. The vehicle-mounted internal combustion engine according to claim 3, wherein, The boss is tilted such that the upper part of the boss in the vertical direction, which is orthogonal to both the front-back direction and the left-right direction, is located further out in the left-right direction. The rib, located on the upper surface of the side of the boss in the vehicle-mounted position, extends from the upper surface along the reference plane to the end of the rib.