Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/02—Arrangements for cooling cylinders or cylinder heads
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P5/00—Pumping cooling-air or liquid coolants
  • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P3/00—Liquid cooling
  • F01P3/02—Arrangements for cooling cylinders or cylinder heads
  • F01P2003/024—Cooling cylinder heads
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2050/00—Applications
  • F01P2050/16—Motor-cycles

Definitions

• the present invention relates to an engine in which a water pump is mounted on a cylinder head, and a pump-side cooling water passage of the water pump is connected to a head-side cooling water passage of the cylinder head.
• Cooling water is circulated by cooling water in the radiator using a cooling water pump on the cylinder block side.
• a pump is disposed on an exhaust camshaft, a refrigerant is introduced from an inflow passage of an exhaust valve of a cylinder head, and discharged from an outflow passage on an intake valve side, and the cylinder head is discharged. And cool.
• Patent Document 4 describes a configuration in which a water pump is provided on a side surface of a cylinder head, and a pump shaft is connected to an end of a cam shaft. Here, cooling water is circulated to the cylinder head via a pipe connected to the cylinder head.
• Patent Document 1 JP 05-256134 A
• Patent Document 2 JP-A-11-50844
• Patent Document 3 Japanese Patent Publication No. 63-39766
• Patent Document 4 Patent No. 3080384
• an object of the present invention is to provide an engine capable of reducing the number of parts by reducing piping from a water pump to a cylinder block.
• the invention according to claim 1, which solves the above problem, has a water pump disposed in a cylinder head, and a pump-side cooling water passage formed in the water pump is provided with a head-side cooling water passage formed in the cylinder head.
• the water pump includes a pump-side mounting portion mountable to the head-side mounting portion and the pump-side cooling water.
• a housing having a passage and the pump-side mounting portion are arranged on the pump-side mounting portion, and the pump-side mounting portion is mounted on the head-side mounting portion, thereby connecting with the driving portion.
• a pump-side cooling water passage that is connected to the head-side mounting portion and that can be connected to the head-side opening has a pump-side opening.
• the invention according to claim 2 is the same as the structure according to claim 1, except that the pump-side mounting portion and the head-side mounting portion, and the pump-side opening portion and the head-side opening portion.
• One has an uneven shape that can be fitted to each other along the axial direction of the pump shaft, and the other has a mounting surface along a direction perpendicular to the axial direction.
• the invention according to claim 3 is characterized in that, in addition to the configuration according to claim 2, the pump-side mounting portion and the head-side mounting portion have the concavo-convex shape that can be fitted to each other. You.
• an intake port is provided in the cylinder head, and the cylinder head is supplied to the head-side cooling water passage from the head-side opening.
• a thermostat mounting portion for discharging the cooling water is provided, and the thermostat mounting portion is formed at a position flush with or parallel to the opening of the intake port.
• an intake port is provided on one side and a discharge port is provided on the other side with respect to a cylinder shaft of the cylinder head.
• the head-side opening is provided on the exhaust port side, and the cooling water is supplied from the head-side opening to the vicinity of the exhaust port in the head-side cooling water passage. I do.
• the opening of the exhaust port is inclined with respect to the axial direction of the camshaft so as to face in a direction away from the water pump. It is characterized by doing.
• the cylinder head has the head-side mounting portion and the head-side opening
• the water pump housing has the pump-side mounting portion and the pump-side opening.
• the driving part and the pump shaft can be connected, and the head side opening and the pump side opening are connected to provide pump side cooling. Since the water passage and the head-side cooling water passage can be communicated with each other, the number of cooling water pipes between the water pump and the cylinder head can be reduced, so that the number of parts and the number of assembly steps can be reduced, and the engine can be cooled. The appearance of the system structure can be simply formed.
• the concave and convex shape of one of the pump-side mounting portion and the head-side mounting portion and the pump-side opening and the head-side opening is fitted along the axial direction.
• the positional relationship of the other is slightly deviated, since the mounting surface runs along the direction perpendicular to the axial direction, the positional deviation can be absorbed, and the cylinder head and water pump can be easily separated. Can be joined.
• the intake port and the thermostat mounting surface can be machined in the same directional force when machining the cylinder head, and machining of the cylinder head is easy.
• the cylinder head exhaust valve side can be cooled with the cooling water immediately after being supplied from the water pump, and the cylinder head can be efficiently cooled. is there.
• the exhaust valve since the head side opening is provided on the exhaust port side from the camshaft, even if the arrangement on the exhaust port side is restricted, the exhaust valve is connected to the exhaust port. And the heat transfer area between the exhaust valve and the exhaust port can be reduced.
• FIG. 1 is a schematic diagram of an engine according to an embodiment of the present invention.
• FIG. 2 is a diagram showing a cross section of the water pump according to the embodiment and a cylinder head and the like viewed from above.
• FIG. 3 is a front view showing a state where the water pump according to the embodiment is mounted on a cylinder head.
• FIG. 4 is a front view of the cylinder head according to the embodiment as viewed from a side where a water pump is mounted.
• FIG. 5 is a plan view of the cylinder head according to the embodiment.
• FIG. 6 is a bottom view of the cylinder head according to the embodiment.
• FIG. 7 is a side view of the cylinder head according to the embodiment.
• FIG. 1 and FIG. 2 show an embodiment of the present invention.
• Reference numeral 11 in FIG. 1 denotes a single-cylinder four-cycle, four-valve engine disposed on a motorcycle as a saddle-ride type vehicle.
• a piston 14 is connected to the crankshaft 12 via a connecting rod 13.
• a cylinder head 16 is fixed above the cylinder block 15, a cylinder head 16 is fixed.
• a camshaft 20 is rotatably disposed on the cylinder head 16.
• the camshaft 20 and the crankshaft 12 are connected via a camchain 21, and when the crankshaft 12 is rotated, the power chain 21 is moved.
• the camshaft 20 is rotated through this.
• the rotation of the power shaft 20 causes the intake and exhaust valves 22 and 23 to be opened and closed at a predetermined timing.
• a water pump 19 is attached to the engine 11 on a side surface of the force head shaft 20 of the cylinder head 16 on one end 20a side.
• an end surface 32c as a mounting surface of the head side opening portion 32a and an end surface 35b around the fitting concave portion 35a are formed along a direction perpendicular to the axial direction of the camshaft 20.
• the cylinder head 16 is provided with an intake port 41 on one side where the intake valve 22 is disposed, and the exhaust valve 23 is provided with the camshaft 20 as a boundary.
• An exhaust port 42 is provided on the other side where it is arranged.
• a mounting portion 36a of a thermostat 36 serving as a discharge portion of the head side cooling water passage 32 is provided.
• the thermostat mounting portion 36a is provided at a position separated from the end surface of the opening portion 41a of the suction port 41 and the same or parallel surface.
• a head-side opening 32a is arranged on the exhaust port 42 side of the camshaft 20, and as shown in FIG. 6, the head-side opening 32a is provided.
• An exhaust port 42 is formed in a direction away from the side of the exhaust port 42, and an end face force of an opening 42 a of the exhaust port 42 is inclined so as to face a direction away from the water pump 19.
• the water pump 19 has a pump-side cooling water passage 28 formed integrally with the water pump 19 and a pump-side cooling water passage 28 that can be mounted on the head-side mounting portion 35 of the cylinder head 16.
• a pump housing 29 provided with a mounting portion 34 is provided.
• the pump-side mounting portion 34 has a fitting projection 34a that can be fitted into the fitting recess 35a of the head-side mounting portion 35.
• the pump-side cooling water passage 28 of the pump housing 29 has an inlet 28a protruding from the pump housing 29 at one end and a position corresponding to the head-side opening 32a at the other end. It has a formed pump-side opening 28b.
• the pump side opening 28 b is formed so as to face the head side opening 32 a of the cylinder head 16, and an end surface 28 c as a mounting surface around the opening 28 b is perpendicular to the axial direction of the pump shaft 25. It is formed along the direction.
• a pump chamber 27 is formed in the middle of the pump-side cooling water passage 28 of the pump housing 29, and an impeller 26 as a liquid sending unit is rotatable by a pump shaft 25 inside. Housed in. At the end of the pump shaft 25 connected to the impeller 26, an axial connection portion 25a that can be connected to the axial connection groove 20b of the cam shaft 20 projects in the axial direction of the pump shaft 25.
• the axial connection portion 25a is arranged on the pump-side mounting portion 34.
• the water pump 19 is inserted into the fitting recess 35 a of the head-side mounting portion 35 formed on the side surface of the cylinder head 16 on the one end 20 a side of the camshaft 20.
• the fitting projection 34a of the pump-side mounting portion 34 is fitted along the axial direction of the pump shaft 25.
• the fitting protrusion 34a is fitted into the fitting recess 35a, whereby the axial connection portion 25a of the pump shaft 25 is connected to the axial connection groove 20b of the camshaft 20, and the pump shaft 25 and the pump shaft 25 are connected.
• the camshaft 20 and the camshaft 20 are connected coaxially.
• the pump side opening 28b is directly connected to the head side opening 32a via the gasket in a state corresponding to each other.
• the intake and exhaust valves 22, 23 are opened and closed at a predetermined timing, while the pump shaft 25 is rotated, and the impeller 26 in the pump chamber 27 is rotated. .
• the cooling water from the radiator side is sucked into the pump chamber 27 from the inlet 28 a, and from the pump chamber 27 via the pump-side cooling water passage 28, the pump-side opening It is pumped from section 28b.
• the cooling water is directly supplied to the head-side cooling water passage 32 from the head-side opening 32a of the cylinder head 16 and flows through the head-side cooling water passage 32 to cool the cylinder head 16 and cool the thermostat 36. It is discharged from the mounting portion 36a and returned to the radiator again.
• the head-side cooling water passage 32 is a block having an open upper end surface. Since the cooling water is connected to the cooling water passage 33 on the side, a part of the cooling water flowing into the cooling water passage 32 on the head side flows into the cooling water passage 33 on the block side to cool the cylinder block 15, and the head side again. It flows into the cooling water passage 32 and is discharged from the mounting portion 36a of the thermostat 36.
• the block-side cooling water passage 33 is formed with a predetermined length from the upper end surface of the cylinder block 15 downward.
• the lower end 33a of the block-side cooling water passage 33 is set to the height of the upper surface of the piston 14 at the position where the piston 14 descends most (in this case, 40 ° 50 after top dead center) within the range where the combustion pressure is generated. Have been. Therefore, the surroundings of the combustion chamber are cooled by supplying the cooling water from the head-side cooling water passage 32 to the block-side cooling water passage 33 formed on the upper side of the cylinder block 15.
• the fitting concave portion 35a of the head-side mounting portion 35 of the cylinder head 16 is provided with the fitting convex portion 34a of the pump-side mounting portion 34 of the water pump 19.
• the axial connecting groove 25b of the pump shaft 25 can be connected to the axial connecting groove 20b of the camshaft 20, and at the same time, it is provided at a different position from the head side mounting part 35 and the pump side mounting part 34.
• the pump-side cooling water passage 28 and the head-side cooling water passage 32 can be directly connected to communicate with each other. Therefore, the water pump 19 can be easily mounted on the cylinder head 16.
• the number of parts can be reduced, the weight of the water pump 19 can be reduced, the water resistance can be reduced, and the assembly man-hour can be simplified. Furthermore, since the number of cooling water pipes can be reduced, the appearance of the engine cooling system structure can be simplified.
• cooling water passages 28, 32, and 33 can be shortened as a whole, the radiator can be reduced, and the cooling water temperature can be relatively increased, so that the combustion performance (combustion efficiency) can be improved. S can.
• a block side cooling water passage 33 is formed on the upper side of the cylinder block 15, and water flowing from the head side cooling water passage 32 of the cylinder head 16 is introduced into the upper side of the cylinder block 15. And let it cool.
• the upper part of the cylinder block 15 has a temperature that cools down to the lower side of the cylinder block 15, and thus the upper part of the cylinder block 15 has a high temperature because the combustion pressure is generated. Go. Therefore, when cooling to the lower side of the cylinder block 15, the oil adhering to the inner wall of the cylinder chamber is cooled to increase the viscosity, and the oil increases the sliding resistance. As a result, fuel efficiency is reduced.
• such an engine 11 has a head-side mounting portion 35 and a head-side opening 32a of the head-side cooling water passage 32 on the side of the cylinder head 16 on which the water pump 19 is mounted.
• the pump side opening 28b is connected to the head side opening 32a by attaching the side mounting part 34 to the head side mounting part 35, so that the head side mounting part 35 of the cylinder head 16 and the head
• the side opening 32a, the pump-side mounting portion 34 of the pump housing 29 of the water pump 19, and the pump-side opening 28b are formed in the same direction. Therefore, each of the mounting portions 34 and 35 and each of the openings 28b and 32a can be machined with the same lateral force, and machining of the cylinder head 16 and the pump housing 29 of the water pump 19 is easy.
• the pump-side mounting portion 34 and the head-side mounting portion 35 have a fitting projection 34a and a fitting recess 35a that can be fitted to each other along the axial direction of the pump shaft 25 and the camshaft 20, Since the pump-side opening 28b and the head-side opening 32a have end faces 28c and 32c extending in a direction perpendicular to the axial directions of the pump shaft 25 and the camshaft 20, the pump-side mounting portion 34 and the head When the side mounting portion 35 is fitted, even if the positional relationship between the pump-side opening 28b and the head-side opening 32a is slightly displaced, the displacement is absorbed and the ends 28c and 32c are separated from each other. Liquid-tight joining can be easily achieved with the interposition of the bracket. Therefore, the water pump
• the pump-side mounting portion 34 and the head-side mounting portion 35 have shapes that can be fitted to each other along the axial direction of the pump shaft 25, the pump disposed on the pump-side mounting portion 34 The shaft 25 and the one end 20a of the camshaft 20 arranged in the head-side mounting portion 35 can be accurately aligned and connected.
• an axial connection groove 20b is provided at one end portion 20a of the camshaft 20, and an axial connection portion 25a is provided at the pump shaft 25.
• a thermostat mounting portion 36a serving as a discharge portion of the head-side cooling water passage 32 is provided on the intake port 41 side, and the thermostat mounting portion 36a and the opening 41a of the intake port 41 are flush or parallel. Since it is formed at the position, the end face of the opening 41a of the intake port 41 of the cylinder head 16 and the mounting portion 36a of the thermostat 36 can be processed with the same directional force. Therefore, the head-side mounting part 35, the head-side opening part 32, the intake port 41, and the thermostat mounting part 36a can be machined only in two directions of the cylinder head 16. Therefore, machining of the cylinder head 16 is easy.
• an intake port 41 is provided on one side of the camshaft 20 of the cylinder head 16 as a boundary, an exhaust port 42 is provided on the other side, and a head-side opening 32a is provided on the exhaust port 42 side. Since the cooling water is supplied from the head side opening 32a to the head side cooling water passage 32, the cooling water immediately after being supplied from the water pump 19 makes it possible to supply the cooling water as compared with the intake port 41 side. It is possible to cool the exhaust port 42 side where the high-temperature exhaust gas is in contact, and it is possible to efficiently cool the cylinder head 16.
• the exhaust port 42 is closer to the exhaust port 42 than the camshaft 20.
• the head side opening 32a is provided in the head side opening 32a and the head side opening 32a. Even if the arrangement of the cooling water passage 32 on the exhaust side restricts the arrangement on the exhaust port 42 side, the distance from the exhaust valve 23 to the opening 42a of the exhaust port 42 can be shortened, and the transmission of the exhaust port can be reduced. The heat area can be kept small.
• the present invention is used for various engines having a water pump mounted on a cylinder head, such as engines for various vehicles such as a saddle-ride type vehicle and engines for various devices such as a generator. be able to.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=34055714

Family Applications (2)

Family Applications After (1)

Country Status (4)

Cited By (7)

Families Citing this family (2)

Citations (4)

Family Cites Families (6)

• 2004
  • 2004-07-06 WO PCT/JP2004/009560 patent/WO2005005803A1/ja active Application Filing
  • 2004-07-06 WO PCT/JP2004/009561 patent/WO2005005804A1/ja active Application Filing
  • 2004-07-06 JP JP2005511512A patent/JPWO2005005803A1/ja active Pending
  • 2004-07-06 CN CN 200480019753 patent/CN1820131A/zh active Pending
  • 2004-07-06 CN CN200480019751.2A patent/CN1820130B/zh not_active Expired - Fee Related
  • 2004-07-06 CN CN201310046829.0A patent/CN103133114B/zh not_active Expired - Fee Related
  • 2004-07-06 JP JP2005511513A patent/JP4052660B2/ja active Active
  • 2004-07-09 MY MYPI20042767 patent/MY143333A/en unknown

Patent Citations (4)

Also Published As

Similar Documents

Legal Events