CN103256117A - Gasoline engine with deviated crankshaft - Google Patents
Gasoline engine with deviated crankshaft Download PDFInfo
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- CN103256117A CN103256117A CN2013101562158A CN201310156215A CN103256117A CN 103256117 A CN103256117 A CN 103256117A CN 2013101562158 A CN2013101562158 A CN 2013101562158A CN 201310156215 A CN201310156215 A CN 201310156215A CN 103256117 A CN103256117 A CN 103256117A
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Abstract
The invention discloses a gasoline engine with a deviated crankshaft. The gasoline engine is a piston engine and comprises an air cylinder, a piston, a connecting rod and the crankshaft. The central line of the crankshaft deviates from the vertical median line of the air cylinder, and the deviation quantity is 9-12mm. Within the deviation range, lateral force acting on the piston in a power stroke can be reduced effectively, then lateral pressure on the side face of the air cylinder by the piston is reduced, and therefore energy consumed due to friction between the piston and the wall of the air cylinder can be reduced accordingly. As a result, not only is the thermal efficiency of an internal-combustion engine proved, but also the service life of the air cylinder and the piston can be prolonged. Meanwhile, due to the deviated arrangement of the crankshaft, the stroke of the piston is increased, the acting time of the piston is prolonged, sufficient combustion of fuel is benefited, and more useful work can be obtained under the same combustion condition. Therefore, fuel economy is improved, and the overall performance of the gasoline engine is enhanced.
Description
Technical field
The present invention relates to the petrol engine field, particularly a kind of bent axle offset petrol engine.
Background technique
The motor that acts as a fuel with gasoline during petrol engine, because gasoline viscosity is little, evaporation is fast, can gasoline be sprayed into cylinder with gasoline injection system, after overcompression reaches certain temperature and pressure, uses spark ignitor, makes gas expansion for doing work.Bent axle is petrolic main rotary gadget, is petrolic power source, and itself and piston and connecting rod be common to constitute petrolic power-transmission system.
In the prior art, petrolic bent axle round dot central position is positioned on the vertical center line of cylinder, crankshaft rotating makes connecting rod produce flexible symmetrical swinging arc, piston promotes back and forth operation in cylinder by connecting rod, in the piston expansion stroke, when crankshaft crank forwards 90 to when spending, bent axle moment of torsion and connecting rod inclination angle all are in maximum value, can produce bigger side direction horizontal component this moment to piston, thereby cause piston group and connecting rod bearing and cylinder wall to produce bigger friction, and then cause the loss of petrol engine integral power, and reduce the petrol engine fuel efficiency.
Therefore, need improve petrolic, make motor when acting, can effectively reduce lateral force and the frictional force that acts on piston, thereby improved the thermal efficiency of internal-combustion engine, and can prolong the working life of cylinder and piston, improve the motor overall performance.
Summary of the invention
In view of this, the invention provides a kind of bent axle offset petrol engine, make motor when acting, can effectively reduce lateral force and the frictional force that acts on piston, thereby improved the thermal efficiency of internal-combustion engine, and can prolong the working life of cylinder and piston, improve the motor overall performance.
Bent axle offset petrol engine of the present invention, described motor is reciprocating engine, comprises cylinder, piston, connecting rod and bent axle, and described crankshaft axis b departs from described cylinder median vertical line a and arranges, and Offset is 9-12mm.
Further, described bent axle comprises main journal, connecting rod neck, crank and equilibrium block, described equilibrium block is set to four, the outside end face of described equilibrium block is the arc structure with the main journal coaxial line, be following corresponding relation between described arc structure radius R scope and the petrol engine discharge capacity V, wherein arc structure radius R dimensional units is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,45≤R<50;1.1≤V<1.2,50≤R<55;1.2≤V<1.3,55≤R<60;1.3≤V<1.4,60≤R<64;1.4≤V<1.5,64≤R<69;1.5≤V<1.6,69≤R<73;1.6≤V<1.7,73≤R<78;1.7≤V<1.8,78≤R<83;1.8≤V<1.9,83≤R<87;1.9≤V<2.0,87≤R<92;V=2.0,92≤R<97。
Further, described piston-top surface caves inward and is provided with a bowl type flare pit, and the end face of described piston and piston circumference side are the flat-tope structure transition.
Further, described motor also is provided with constituent, and described constituent comprises water pump and the thermostat that arranges with described water pump integral type, and impeller one end of described water pump is installed and is provided with thermostat base, and described thermostat is installed and is arranged at described thermostat base.
Further, described motor also is provided with lubrication system, comprises oil pump and sump strainer, and described oil pump cooperates with the direct-connected transmission of described bent axle.
Further, described sump strainer comprises fuel sucking pipe, filter screen and holder oil device, the oily device of described holder comprises cover body and is one-body molded and be used for the ring structure holder oil boss of holder oil, the taper type structure of described cover body for being increased gradually by oil inlet end to oil outlet end internal diameter with described cover body.
Further, described motor also comprises cylinder head assembly, described cylinder head assembly comprises cylinder head, oily rail, oil nozzle and cam pack, described cylinder head comprises the cylinder cap body and is arranged at the intrinsic intake duct of cylinder cap and air outlet flue, described oil nozzle and described oily rail all are installed on the air inlet side of described cylinder head, and described oil nozzle fixedly is communicated with described oily rail and its oil spout end stretches in the described intake duct; Described intake duct and air outlet flue tilt to the top with respect to the attachment face of described cylinder head body respectively from inside to outside.
Further, the firing chamber face that described cylinder cap body lower end indent forms, described firing chamber face is spheric structure and is that four air valve structures are arranged, mind-set cylinder head intake and exhaust both sides form two plane of inclination in the edge, face top, described firing chamber, and apportion is provided with two inlet valve ports and two exhaust valve ports on described two plane of inclination.
Further, described cylinder head assembly also comprises valve assembly, described valve assembly comprises intake valve and exhaust valve, described intake valve comprises intake valve sealed department, intake valve neck and intake valve bar, described exhaust valve comprises exhaust valve sealed department, exhaust valve neck and exhaust valve rod, it is characterized in that: described intake valve sealed department comprises annular sealing surface I and dish type conical surface I, be following corresponding relation between the diameter R1 of described annular sealing surface I and the described engine displacement V, wherein the diameter R1 dimensional units of annular sealing surface I is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,17≤R1<19;1.1≤V<1.2,19≤R1<21;1.2≤V<1.3,21≤R1<23;1.3≤V<1.4,23≤R1<24.5;1.4≤V<1.5,24.5≤R1<26;V=1.5,26≤R1≤27;
Described exhaust valve sealed department comprises annular sealing surface II and dish type conical surface II, be following corresponding relation between the diameter R2 of described annular sealing surface II and the described engine displacement V, wherein the diameter R2 dimensional units of annular sealing surface II is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,15≤R1<17;1.1≤V<1.2,17≤R1<18.5;1.2≤V<1.3,18.5≤R1<20;1.3≤V<1.4,20≤R1<21.5;1.4≤V<1.5,21.5≤R1<23;V=1.5,23≤R1≤24。
Further, described piston center line departs from described cylinder vertical center line 0.5-0.8mm setting.
Beneficial effect of the present invention: bent axle offset petrol engine of the present invention, described crankshaft axis departs from the setting of described cylinder median vertical line, Offset is 9-12mm, in this biasing scope, act on the lateral force of piston in the time of can effectively reducing expansion stroke, and then reduce piston to cylinder side lateral pressure, thereby make the energy that consumes because of friction between piston and the cylinder wall also can correspondingly reduce, not only improve the thermal efficiency of internal-combustion engine, can also prolong the working life of cylinder and piston; Simultaneously, because the biasing setting of bent axle causes piston stroke to strengthen, the piston working application time prolongs, and is conducive to the abundant burning of fuel, can obtain more useful work under same combustion condition, thereby improve fuel economy, improves the motor overall performance.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is structural representation of the present invention;
Fig. 2 is bent axle bias structure schematic representation;
Fig. 3 is the crankshaft structure schematic representation;
Fig. 4 is that Fig. 3 E is to view;
Fig. 5 is the piston structure schematic representation;
Fig. 6 is the water pump structure schematic representation;
Fig. 7 is the sump strainer structural representation;
Fig. 8 is the cylinder head assembly generalized section;
Fig. 9 is the intake valve structural representation;
Figure 10 is the exhaust valve structure schematic representation;
Figure 11 is Fig. 2 a-quadrant enlarged diagram.
Embodiment
Fig. 1 is structural representation of the present invention, Fig. 2 is bent axle bias structure schematic representation, Fig. 3 is the crankshaft structure schematic representation, Fig. 4 is that Fig. 3 E is to view, Fig. 5 is the piston structure schematic representation, Fig. 6 is the water pump structure schematic representation, Fig. 7 is the sump strainer structural representation, Fig. 8 is the cylinder head assembly generalized section, and Fig. 9 is the intake valve structural representation, and Figure 10 is the exhaust valve structure schematic representation, Figure 11 is Fig. 2 a-quadrant enlarged diagram, as shown in the figure: the bent axle offset petrol engine of present embodiment, described motor is reciprocating engine, comprises cylinder 1, piston 2, connecting rod 3 and bent axle 4, described crankshaft axis b departs from described cylinder median vertical line a and arranges, Offset L is limited between the 9-12mm, for example 9mm, 10mm, 11mm, 12mm is to obtain optimum effect; In the present embodiment, Offset L is 10mm, and this Offset can reduce piston effectively to the pressure of cylinder side, and then the energy of reducing friction and consuming, and prolongs the working life of cylinder and piston.
In the present embodiment, described bent axle 4 comprises main journal 5, connecting rod neck 6, crank and equilibrium block 7, described equilibrium block is set to four, the outside end face of described equilibrium block 7 is the arc structure with the main journal coaxial line, be following corresponding relation between described arc structure radius R scope and the petrol engine discharge capacity V, wherein arc structure radius R dimensional units is millimeter, engine displacement V unit is for rising, in the form, the crankshaft counter balance arc structure radius R of the corresponding different range of each engine displacement, wherein each scope is three embodiments:
Four equilibrium blocks are set on the bent axle, with respect to each engine displacement, equilibrium block arc structure radius all has a controlled scope, according to this scope, can change according to the design to crankshaft counter balance of the design modification of motor self discharge capacity, can satisfy the dynamic balancing of bent axle, it is minimum again mass of balance block to be dropped to, even the large-duty engine of 1.8l or 2.0l also can satisfy dynamically balanced requirement under the situation of this four equilibrium blocks bent axle, reach the light-weighted purpose of bent axle, avoid producing the waste of material, improve the performance of motor, fuel economy and reduction discharging, it is good that four equilibrium block bent axles of the present invention also have a balanced ratio, improves engine luggine, reduces the advantage of bearing maximum load; Bent axle 4 is the four cylinder engine bent axle in the present embodiment, described crank quantity is set to eight, comprise crank I 8, crank II 9, crank III 10, crank IV 11, crank V 12, crank VI 13, crank VII 14 and crank VIII 15, described four equilibrium blocks are corresponding and be integrally formed at crank I, crank IV, crank V and crank VIII one by one; In the present embodiment, main journal is set to five, and the corresponding cylinder number of connecting rod neck is set to four; The Placement of equilibrium block and crank has multiple, both can connect by existing machinery Placements such as bolts, also can one-body moldedly arrange, and in the present embodiment, four equilibrium blocks and the one-body molded setting of corresponding crank; Certainly, the petrol engine four equilibrium block bent axles of present embodiment also comprise timing sprocket axle journal 16 and flywheel flange plate 17.
In the present embodiment, described piston 2 end faces cave inward and are provided with a bowl type flare pit 18, and the end face of described piston and piston circumference side are the flat-tope structure transition; The transition of indication flat-tope structure refers to that the circumference sagittal plane of piston-top surface from flare pit circumference top edge bead to piston circumference side is the sharp edge structure of no chamfering, and piston-top surface also is vertical flat-top setting with the joint of piston side; The end face of piston and piston circumference side are the flat-tope structure transition, chamfering not, can avoid because of what chamfering structure caused inflammable gas or high-temperature high-pressure fuel gas being produced guiding to the gap between piston and the piston cylinder, can reduce inflammable gas in the gap between piston and the piston cylinder and the concentration of high-temperature high-pressure fuel gas, reduce the radial load of compression ring, reduce high-temperature high-pressure fuel gas to the corrosion of compression ring, prolong the working life of compression ring, reduce the maintenance cost of internal-combustion engine, firing chamber working surface and the piston-top surface working surface of cylinder head are complementary, the stability of guaranteed discharge product matter, the piston-top surface of flat-tope structure can cooperate formation compression clearance with cylinder cap simultaneously, be conducive to the area of contact of piston minimizing and high-temperature gas, make stress distribution even, guarantee the integrally-built stability of motions of connecting rod; And the piston-top surface of flat-tope structure can produce and squeeze the stream effect as the part of firing chamber, and the interior combustion gas of cylinder is mixed, and helps in-cylinder combustion.
In the present embodiment, described motor also is provided with constituent, described constituent comprises water pump 19 and the thermostat that arranges with described water pump 19 integral types, and impeller one end of described water pump 19 is installed and is provided with thermostat base 20, and described thermostat is installed and is arranged at described thermostat base 20; Thermostat base 20 is provided be used to the thermostat chamber 21 that holds thermostat, thermostat is not shown in the drawings, water pump and thermoregulator fitting seat are linked together, make cooling system structure compacter, and thermoregulator is arranged on the water inlet position of motor, more responsive to water inlet control, degree of regulation is higher, can not make the water temperature in the engine cylinder-body produce big fluctuation, thereby make engine running steady.
In the present embodiment, described motor also is provided with lubrication system, comprises oil pump 22 and sump strainer 23, and described oil pump 22 cooperates with described bent axle 4 direct-connected transmissions; Oil pump is provided with round square hole, and the timing sprocket axle journal 16 of bent axle directly is connected transmission with oil pump circle square hole and cooperates, and guarantees that the operation power of oil pump needs, and makes oil pump mounting structure compactness, conserve space.
In the present embodiment, described sump strainer comprises fuel sucking pipe 24, filter screen 25 and holds in the palm oily device, the oily device of described holder comprises cover body 26 and is one-body molded and be used for the ring structure holder oil boss 27 of holder oil, the taper type structure of described cover body 26 for being increased gradually by oil inlet end to oil outlet end internal diameter with described cover body 26; Can guarantee on the slope or the sufficient and stable supply of the machine oil of the state of jolting motor when travelling, prevent wearing and tearing aggravation and the tile kilning phenomenon of vehicle motor internal works, ensure performance and the working life of motor.
In the present embodiment, described motor also comprises cylinder head assembly, described cylinder head assembly comprises cylinder head, oily rail, oil nozzle 28 and cam pack 33, described cylinder head comprises cylinder cap body 29 and is arranged at the intrinsic intake duct 30 of cylinder cap and air outlet flue 31, described oil nozzle 28 and described oily rail all are installed on the air inlet side of described cylinder head, and described oil nozzle 28 fixedly is communicated with described oily rail and its oil spout end stretches in the described intake duct; Described intake duct 30 and air outlet flue 31 tilt to the top with respect to the attachment face of described cylinder head body 29 respectively from inside to outside; The oil rail is not shown in the drawings, intake duct 30 and air outlet flue 31 are obliquely installed and can reduce intake and exhaust resistance, improve intake efficiency, when improving engine power and reducing discharging, also can have adaptability preferably with the installation of other parts on the cylinder head, can not influence the layout of other parts.
In the present embodiment, the firing chamber face 32 that described cylinder cap body 29 lower end indents form, described firing chamber face 32 is spheric structure and is that four air valve structures are arranged, mind-set cylinder head intake and exhaust both sides form two plane of inclination in the edge, face 32 tops, described firing chamber, and apportion is provided with two inlet valve ports and two exhaust valve ports on described two plane of inclination.
In the present embodiment, described cylinder head assembly also comprises valve assembly, described valve assembly comprises intake valve and exhaust valve, described intake valve comprises intake valve sealed department 33, intake valve neck 34 and intake valve bar 35, described exhaust valve comprises exhaust valve sealed department 36, exhaust valve neck 37 and exhaust valve rod 38, described intake valve sealed department comprises annular sealing surface I 331 and dish type conical surface I 332, be following corresponding relation between the diameter R1 of described annular sealing surface I and the described engine displacement V, wherein the diameter R1 dimensional units of annular sealing surface I is millimeter, engine displacement V unit is for rising, in the following table, the diameter R1 of the annular sealing surface I of the corresponding different range of each engine displacement, wherein each scope is three embodiments:
;
Described exhaust valve sealed department 36 comprises annular sealing surface II 361 and dish type conical surface II 362, be following corresponding relation between the diameter R2 of described annular sealing surface II and the described engine displacement V, wherein the diameter R2 dimensional units of annular sealing surface II is millimeter, and engine displacement V unit is for rising
, in the following table, the diameter R3 of the annular sealing surface I of the corresponding different range of each engine displacement, wherein each scope is three embodiments:
;
The setting of the dish type conical surface can be played the closing seam when guaranteeing valve closure firing chamber valve port, and the dish type conical surface can be limited on the exhaust valve seat insert that is arranged at exhaust valve port, guarantees closure effect; Take all factors into consideration the sealed department of intake valve and exhaust valve to the influence of engine chamber sealing, motor according to different displacements, adopt the diameter of the sealing surface of corresponding intake valve and exhaust valve, improve the combination property of motor, prolong the working life of valve and motor.
In the present embodiment, described piston center line c departs from described cylinder vertical center line a and arranges, and Offset d is 0.5-0.8mm; The piston setting of setovering equally acts on the lateral force of piston in the time of can further reducing expansion stroke, and then reduces piston to cylinder side lateral pressure, makes the energy that consumes because of friction between piston and the cylinder wall also can correspondingly reduce.
Explanation is at last, above embodiment is only unrestricted in order to technological scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technological scheme of the present invention, and not breaking away from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. bent axle offset petrol engine, described motor is reciprocating engine, comprises cylinder, piston, connecting rod and bent axle, it is characterized in that: described crankshaft axis departs from the setting of described cylinder median vertical line, and Offset is 9-12mm.
2. bent axle offset petrol engine according to claim 1, it is characterized in that: described bent axle comprises main journal, connecting rod neck, crank and equilibrium block, described equilibrium block is set to four, the outside end face of described equilibrium block is the arc structure with the main journal coaxial line, be following corresponding relation between described arc structure radius R scope and the petrol engine discharge capacity V, wherein arc structure radius R dimensional units is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,45≤R<50;1.1≤V<1.2,50≤R<55;1.2≤V<1.3,55≤R<60;1.3≤V<1.4,60≤R<64;1.4≤V<1.5,64≤R<69;1.5≤V<1.6,69≤R<73;1.6≤V<1.7,73≤R<78;1.7≤V<1.8,78≤R<83;1.8≤V<1.9,83≤R<87;1.9≤V<2.0,87≤R<92;V=2.0,92≤R<97。
3. bent axle offset petrol engine according to claim 2, it is characterized in that: described piston-top surface caves inward and is provided with a bowl type flare pit, and the end face of described piston and piston circumference side are the flat-tope structure transition.
4. bent axle offset petrol engine according to claim 3, it is characterized in that: described motor also is provided with constituent, described constituent comprises water pump and the thermostat that arranges with described water pump integral type, impeller one end of described water pump is installed and is provided with thermostat base, and described thermostat is installed and is arranged at described thermostat base.
5. bent axle offset petrol engine according to claim 4, it is characterized in that: described motor also is provided with lubrication system, comprises oil pump and sump strainer, and described oil pump cooperates with the direct-connected transmission of described bent axle.
6. bent axle offset petrol engine according to claim 5, it is characterized in that: described sump strainer comprises fuel sucking pipe, filter screen and holder oil device, the oily device of described holder comprises cover body and is one-body molded and be used for the ring structure holder oil boss of holder oil, the taper type structure of described cover body for being increased gradually by oil inlet end to oil outlet end internal diameter with described cover body.
7. bent axle offset petrol engine according to claim 6, it is characterized in that: described motor also comprises cylinder head assembly, described cylinder head assembly comprises cylinder head, oily rail, oil nozzle and cam pack, described cylinder head comprises the cylinder cap body and is arranged at the intrinsic intake duct of cylinder cap and air outlet flue, described oil nozzle and described oily rail all are installed on the air inlet side of described cylinder head, and described oil nozzle fixedly is communicated with described oily rail and its oil spout end stretches in the described intake duct; Described intake duct and air outlet flue tilt to the top with respect to the attachment face of described cylinder head body respectively from inside to outside.
8. bent axle offset petrol engine according to claim 7, it is characterized in that: the firing chamber face that described cylinder cap body lower end indent forms, described firing chamber face is spheric structure and is that four air valve structures are arranged, mind-set cylinder head intake and exhaust both sides form two plane of inclination in the edge, face top, described firing chamber, and apportion is provided with two inlet valve ports and two exhaust valve ports on described two plane of inclination.
9. bent axle offset petrol engine according to claim 8, it is characterized in that: described cylinder head assembly also comprises valve assembly, described valve assembly comprises intake valve and exhaust valve, described intake valve comprises the intake valve sealed department, intake valve neck and intake valve bar, described exhaust valve comprises the exhaust valve sealed department, exhaust valve neck and exhaust valve rod, it is characterized in that: described intake valve sealed department comprises annular sealing surface I and dish type conical surface I, be following corresponding relation between the diameter R1 of described annular sealing surface I and the described engine displacement V, wherein the diameter R1 dimensional units of annular sealing surface I is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,17≤R1<19;1.1≤V<1.2,19≤R1<21;1.2≤V<1.3,21≤R1<23;1.3≤V<1.4,23≤R1<24.5;1.4≤V<1.5,24.5≤R1<26;V=1.5,26≤R1≤27;
Described exhaust valve sealed department comprises annular sealing surface II and dish type conical surface II, be following corresponding relation between the diameter R2 of described annular sealing surface II and the described engine displacement V, wherein the diameter R2 dimensional units of annular sealing surface II is millimeter, and engine displacement V unit is for rising:
1.0≤V<1.1,15≤R1<17;1.1≤V<1.2,17≤R1<18.5;1.2≤V<1.3,18.5≤R1<20;1.3≤V<1.4,20≤R1<21.5;1.4≤V<1.5,21.5≤R1<23;V=1.5,23≤R1≤24。
10. bent axle offset petrol engine according to claim 9 is characterized in that: described piston center line departs from described cylinder vertical center line 0.5-0.8mm and arranges.
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WO2023024353A1 (en) * | 2021-08-27 | 2023-03-02 | 广西玉柴机器股份有限公司 | Special engine for range extende |
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