CN201474786U - Motorcycle engine cylinder head - Google Patents
Motorcycle engine cylinder head Download PDFInfo
- Publication number
- CN201474786U CN201474786U CN2009203054135U CN200920305413U CN201474786U CN 201474786 U CN201474786 U CN 201474786U CN 2009203054135 U CN2009203054135 U CN 2009203054135U CN 200920305413 U CN200920305413 U CN 200920305413U CN 201474786 U CN201474786 U CN 201474786U
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- CN
- China
- Prior art keywords
- firing chamber
- cylinder head
- spark plug
- mounting hole
- motorcycle engine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a motorcycle engine cylinder head, which is characterized in that the combustion chamber of the engine cylinder head is a dihedral angle structured pentroof combustion chamber, the plane angle between two half planes of the dihedral angle structure of the pentroof combustion chamber is an obtuse angle, the sides of the two half planes are respectively connected by a spherical surface to form rounding transition, one half plane is provided with an air inlet valve of an air inlet passage, and the other half plane is provided with an air exhaust valve of an exhaust passage; the air inlet valve and the air exhaust valve are arranged to deviate to the center of the combustion chamber in a malposition way, the combustion chamber is internally provided with two spark plug installation holes, and the top of the air inlet passage is provided with an injector bore penetrating through the solid body. The utility model can lead the motorcycle engine to realize the lean burn technology and improves the fuel economy of the motorcycle engine.
Description
Technical field
The utility model relates to the motorcycle engine cylinder head, the particularly a kind of motorcycle engine cylinder head that can realize Lean Burning Technique.
Background technique
Quick growth along with gasoline-fueled Motor Vehicle, the energy that Motor Vehicle consumes is also more and more, and international oil price is also high, how energy saving, be one of key that realizes sustainable development, therefore develop the focus that the motor with low oil consumption performance has become current production development.Along with the application of Lean Burning Technique, the fuel economy of automotive gasoline engine is improved in the motor car engine field.The Lean Burning Technique that present automotive gasoline engine is adopted is by reducing the gasoline content in the engine mixed gas, to realize the lean combustion of motor.At present automotive gasoline engine is that technology from following three aspects realizes Lean Burning Technique: the one, improve compression ratio, and adopt the compact type firing chamber, the ratio of cylinder capacity with combustion chamber volume is increased to about 13: 1, impel velocity of combustion to accelerate; Make the stronger air movement eddy flow of formation in the cylinder by the suction port position of improving the firing chamber, improve airspeed; Spark plug is placed firing chamber central authorities, shorten ignition distance.The 2nd, stratified mixture combustion, around spark plug, form oil, the rich mixture that be easy to light a fire of gas proportions of ingredients about 1: 12 by the air motion in the cylinder, thin gradually oil, the gas proportions of ingredients of allowing of skin reaches 1: 25, and after rich mixture was lighted, burning involved skin rapidly.The 3rd, high-energy ignition, motor car engine adopts in-cylinder direct injection more, adopts high-energy ignition to help fiery karyomorphism with the broad gap spark plug and becomes, and flame travel shortens, and velocity of combustion speeds, and lean flammability limit is big.But, on motor car engine, obtained the Lean Burning Technique that is widely applied to, but be difficult to realize in the motorcycle engine field, this is because motorcycle engine and automotive gasoline engine structurally have bigger difference, the motorcycle engine volume is little, the firing chamber of its cylinder head is also less relatively, and a spark plug only is set usually, the neutral position of spark plug between the inlet and outlet door; Motorcycle engine adopts the intake manifold injection technology more simultaneously, and oil sprayer is arranged on the outer suction tude of cylinder head.As the firing chamber being arranged to satisfy Lean Burning Technique, do not carry out creationary improvement design, just be difficult in and arrange required structure and the component of realization lean combustion on the engine cylinder head, so the engine underpressure combustion technology fails to realize in the motorcycle engine field always.
Summary of the invention
The purpose of this utility model is the deficiency that exists at prior art, a kind of motorcycle engine cylinder head is provided, it is by being provided with the paulin shape firing chamber of dihedral angle structure at cylinder head, intake valve, exhaust valve dislocation are offset in the firing chamber and are provided with in the heart, and two spark plug mounting holes are set in the firing chamber two spark plugs are installed, at the intake duct top one mounting hole of oil sprayer being set is installed in oil sprayer in the intake duct, make motorcycle engine can realize Lean Burning Technique, improve the fuel economy of motorcycle engine.
The purpose of this utility model is achieved in that the cylinder face that closes of engine cylinder head is provided with the firing chamber, described firing chamber is the paulin shape firing chamber of dihedral angle structure, plane angle between two half planes of the dihedral angle structure of described paulin shape firing chamber is the obtuse angle, the rib of dihedral angle is positioned at top, paulin shape firing chamber, the side of two half planes is connected to form rounding off by sphere respectively, the lower end surface of firing chamber is the positive circle corresponding with cylinder, the intake valve of an intake duct is set on half plane, the exhaust valve of an air outlet flue is set on another half plane, described intake valve, exhaust valve is partial to firing chamber off(-)center setting, two spark plug mounting holes are set in the firing chamber, be provided with on the half plane of intake valve first spark plug mounting hole is set, it is other relative with exhaust valve that first spark plug mounting hole is positioned at intake valve, be provided with on the half plane of exhaust valve second spark plug mounting hole is set, it is other relative with intake valve that second spark plug mounting hole is positioned at exhaust valve, and described intake duct top is provided with a mounting hole of oil sprayer that runs through entity.
Described plane angle is 120 °～160 °.
The shaft axis of described mounting hole of oil sprayer extends to the intake valve direction.
Owing to adopted such scheme, the paulin shape firing chamber of dihedral angle structure is adopted in the firing chamber of motorcycle engine cylinder head, utilize two half planes of dihedral angle structure that intake valve, exhaust valve and two spark plug mounting holes are set respectively, make the dislocation of can setovering of intake valve, exhaust valve and two spark plug mounting holes be arranged in relative less firing chamber, both solved the installing space of two spark plugs, also changed simultaneously the entrance angle of intake duct, for arrange mounting hole of oil sprayer in intake duct, making oil sprayer is installed in provides condition in the intake duct.Make the utility model motorcycle engine cylinder head have following beneficial effect thus:
1. adopt two spark plugs in the firing chamber, can improve ignition energy, help fiery karyomorphism and become, flame travel shortens, and velocity of combustion is accelerated, and promotes engine performance; Increase the lean combustion limit simultaneously, guarantee under thin mixed gas condition, can light a fire.
2. oil sprayer is installed in the air flue, can prolongs gasoline and Air mixing time, fuel injection and gas in the jar motion control easily are easy to realize controlled lean combustion; Compare with the mode that oil sprayer is installed on the suction tude that motorcycle engine is used always simultaneously, gas-duct jetting is more near intake valve, can when opening, intake valve carry out secondary fuel injection, near spark plug, form oil gas mixing ratio and be 1: 12 than rich mixture, guarantee that near the mixed gas the spark plug is easy to light, and the thin gradually oil gas mixing ratio that allows of skin reaches about 1: 17, and the layering lean combustion is achieved; And the cost of gas-duct jetting is far below the cost of the in-cylinder direct injection of motor car engine.
3. adopted the paulin shape firing chamber of the dihedral angle structure of inlet and outlet door biasing, biasing by the inlet and outlet door shifts to install and can make the mixed gas that enters in the firing chamber form stronger eddy current, make the interior air-flow of cylinder more violent, help velocity of combustion and accelerate, guarantee the flame propagation of lean combustion; This paulin shape firing chamber also has the high characteristics of volumetric efficiency simultaneously.
The structure of the utility model cylinder head is provided with rationally, and the engine underpressure combustion technology can be achieved in the motorcycle engine field.
The utility model is described in further detail below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the worm's eye view of the utility model cylinder head;
Fig. 2 is the plan view of the utility model cylinder head;
Fig. 3 be the utility model cylinder head along Figure 1A-A to sectional drawing;
Fig. 4 be the utility model cylinder head along Figure 1B-B to sectional drawing;
Fig. 5 is the schematic representation of the firing chamber of the utility model cylinder head;
Fig. 6 is intake valve, exhaust valve, the spark plug distribution schematic diagram in the firing chamber.
In the accompanying drawing, 1 is intake duct, and 1a is an intake valve, and 2 is air outlet flue, and 2a is an exhaust valve, 3 is first spark plug mounting hole, and 4 is second spark plug mounting hole, and 4a is second spark plug, and 5 is mounting hole of oil sprayer, 6 is piston, and 7 is the firing chamber, and 8 is the intake valve pilot hole, and 9 is the exhaust valve pilot hole.
Embodiment
Referring to Fig. 1 to Fig. 6, the cylinder face that closes of motorbike lean combustion engine cylinder head is provided with firing chamber 7, the paulin shape firing chamber that described firing chamber 7 is the dihedral angle structure, plane angle α between two half planes of the dihedral angle structure of described paulin shape firing chamber is the obtuse angle, plane angle α is 120 °～160 °, be advisable with 143 °～148 °, the number of degrees of plane angle can decide optimum scheme according to the discharge capacity and the compression ratio of motor.The rib of described dihedral angle is positioned at top, paulin shape firing chamber, the side of two half planes is connected to form rounding off by sphere respectively, the lower end surface of firing chamber 7 is the positive circle corresponding with cylinder, in the cylinder is piston 6, the intake valve 1a of an intake duct 1 is set on half plane, the exhaust valve 2a of an air outlet flue 2 is set on another half plane, described intake valve 1a, exhaust valve 2a is partial to firing chamber 7 off(-)center settings, two spark plug mounting holes are set in the firing chamber 7, be provided with on the half plane of intake valve first spark plug mounting hole 3 is set, it is other relative with exhaust valve 2a that first spark plug mounting hole 3 is positioned at intake valve 1a, be provided with and second spark plug mounting hole, 4, the second spark plug mounting holes 4 be set on the half plane of exhaust valve to be positioned at exhaust valve 2a other relative with intake valve 1a.Described intake duct 1 top is provided with a mounting hole of oil sprayer 5 that runs through entity.The shaft axis of described mounting hole of oil sprayer 5 extends to intake valve 1a direction, make oil sprayer be installed on the mounting hole of oil sprayer 5 after, oil sprayer can spray to the intake valve direction.Intake duct 1 upper end is provided with the intake valve pilot hole 8 that runs through entity, and air outlet flue 2 upper ends are provided with the exhaust valve pilot hole 9 that runs through entity.
The compression ratio of the cylinder capacity of the motorcycle engine of employing the utility model cylinder head and the volume of paulin shape firing chamber is 8: 1 to 13: 1, the volume of paulin shape firing chamber decides according to the discharge capacity and the compression ratio of motor, generally speaking, discharge capacity is that 125mL, 10: 1 motor paulin shape combustion chamber volume of compression ratio are 12～15mL; Discharge capacity is that 400mL, 10: 1 motor paulin shape combustion chamber volume of compression ratio are 35～45mL.The influence of Actual combustion volume (referring to the volume in cylinder when piston is in upper dead center, valve and all closes) needs calculating piston seat and piston upper surface shape.
Claims (3)
1. motorcycle engine cylinder head, the cylinder face that closes of engine cylinder head is provided with the firing chamber, it is characterized in that: described firing chamber is the paulin shape firing chamber of dihedral angle structure, plane angle between two half planes of the dihedral angle structure of described paulin shape firing chamber is the obtuse angle, the rib of dihedral angle is positioned at top, paulin shape firing chamber, the side of two half planes is connected to form rounding off by sphere respectively, the lower end surface of firing chamber is the positive circle corresponding with cylinder, the intake valve of an intake duct is set on half plane, the exhaust valve of an air outlet flue is set on another half plane, described intake valve, exhaust valve is partial to firing chamber off(-)center setting, two spark plug mounting holes are set in the firing chamber, be provided with on the half plane of intake valve first spark plug mounting hole is set, it is other relative with exhaust valve that first spark plug mounting hole is positioned at intake valve, be provided with on the half plane of exhaust valve second spark plug mounting hole is set, it is other relative with intake valve that second spark plug mounting hole is positioned at exhaust valve, and described intake duct top is provided with a mounting hole of oil sprayer that runs through entity.
2. motorcycle engine cylinder head according to claim 1 is characterized in that: described plane angle is 120 °～160 °.
3. motorcycle engine cylinder head according to claim 1 is characterized in that: the shaft axis of described mounting hole of oil sprayer extends to the intake valve direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203054135U CN201474786U (en) | 2009-06-30 | 2009-06-30 | Motorcycle engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203054135U CN201474786U (en) | 2009-06-30 | 2009-06-30 | Motorcycle engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201474786U true CN201474786U (en) | 2010-05-19 |
Family
ID=42411032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203054135U Expired - Fee Related CN201474786U (en) | 2009-06-30 | 2009-06-30 | Motorcycle engine cylinder head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201474786U (en) |
-
2009
- 2009-06-30 CN CN2009203054135U patent/CN201474786U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20120630 |