CN105019998A - Engine - Google Patents
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- CN105019998A CN105019998A CN201410177640.XA CN201410177640A CN105019998A CN 105019998 A CN105019998 A CN 105019998A CN 201410177640 A CN201410177640 A CN 201410177640A CN 105019998 A CN105019998 A CN 105019998A
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Abstract
The invention discloses an engine. The engine comprises a crank-link mechanism, spark plugs, diesel oil sprayers and gasoline sprayers spraying gasoline fuel. The crank-link mechanism comprises a machine set, a piston connecting rod set and a crankshaft flywheel set. The bottom parts, corresponding to air cylinders, of air cylinder covers of the machine set are of an upwards-concave structure. The top faces of pistons of the piston connecting rod set are in the shape matched with the shape of the upwards-concave structure, and pits are formed in the center areas of the top faces of the pistons. The pits comprise first ignition pit parts and second ignition pit parts. Each air cylinder is correspondingly provided with one spark plug. Each air cylinder is correspondingly provided with one diesel oil sprayer. The spark plugs and the diesel oil sprayers corresponding to the air cylinders deviate relative to the center lines of the air cylinders. The spark plugs correspond to the first ignition pit parts, and the diesel oil sprayers correspond to the second ignition pit parts. The gasoline sprayers are used for ejecting gasoline fuel. Double ignition centers can be formed through the engine, the burning efficiency can be improved, and meanwhile the top face line type of the pistons can be better matched with the bottom faces of the air cylinder covers.
Description
Technical field
The present invention relates to automotive field, especially relate to a kind of motor.
Background technique
Diesel engine has that fuel economy is good, high reliability, and usage ratio on automobile is more and more higher, but the air quality of the discharge of diesel engine to city causes adverse influence, and particularly when cold-starting, it is poorer to discharge.The temperature of diesel car starting period motor is lower, in order to smooth combustion, the fuel delivery of motor is larger, cause fuel-oil atmozation not good, the not high Exhaust Gas Catalytic Converter for Automobiles transformation efficiency that causes of exhaust temperature is not high simultaneously, further deterioration discharge, pollutes air on the one hand, adds fuel consume during starting on the other hand.Existing duel fuel engine is many based on diesel engine, and firing chamber only has an ignition center, cannot meet combustion requirements well.Cylinder cover bottom surface adopts plane structure simultaneously, and cause piston compression height comparatively large, piston total quality is heavier, and piston rod inertial force is large, and the merit loss of friction pair is more, reduces the power performance of motor.
Summary of the invention
The present invention is intended to solve one of above-mentioned technical problem of the prior art at least to a certain extent.For this reason, one object of the present invention is to propose a kind of motor, the end face of the piston of this motor can be suitable with the bottom surface of cylinder head well, thus effectively utilize head space, the compression height of piston is reduced, the weight saving of piston, thus decrease the frictional loss of piston connecting rod unit, improve the thermal efficiency of motor, the bowl configurations of piston can mate spark plug and diesel injector two incendiary sources better simultaneously, improves firing effect.
According to the motor of the embodiment of the present invention, comprise: connecting rod, described connecting rod comprises body group, piston connecting rod unit and crankshaft-flywheel group, in the cylinder block of described body group, there is at least one cylinder, the intake duct corresponding with each described cylinder and air outlet flue is formed in the cylinder head of described body group, the underside portion of the corresponding cylinder of described cylinder head is formed as fovea superior structure, the end face of the piston of described piston connecting rod unit has the shape suitable with described fovea superior structure and the middle section of the end face of described piston is formed with pit, described pit comprises first fiery pit portion and second point fiery pit portion, spark plug, each described cylinder correspondence arranges a described spark plug, diesel injector, each described cylinder correspondence arranges a described diesel injector, the centerline offset of the described spark plug described cylinder relative to described diesel injector that wherein each described cylinder is corresponding is arranged, corresponding first fiery pit portion of described spark plug and the corresponding second point fiery pit portion of described diesel injector, and for the gasoline ejector of injected petrol fuel.
According to the motor of the embodiment of the present invention, the end face of its piston can be suitable with the bottom surface of cylinder head well, thus effectively utilize head space, the compression height of piston is reduced, the weight saving of piston, thus the frictional loss decreasing piston connecting rod unit, improve the thermal efficiency of motor, the bowl configurations of piston can mate spark plug and diesel injector two incendiary sources better simultaneously, improves firing effect.
In addition, according to the motor of the embodiment of the present invention, following additional technical feature can also be had:
According to some embodiments of the present invention, the center line of described diesel injector and the centerline parallel of described cylinder.
According to some embodiments of the present invention, the intersection point of the center line of described diesel injector and the bottom surface of described cylinder head is to the distance of the center line of described cylinder within 0.15D, and wherein D is the diameter of cylinder.
According to some embodiments of the present invention, the centerline dip of the relatively described cylinder of described spark plug arrange and the angle of the center line of the center line of described spark plug and described cylinder between 15 °-25 °.
According to some embodiments of the present invention, the intersection point of the center line of described spark plug and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.075D.
According to some embodiments of the present invention, the intersection point of the center line of described diesel injector and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.1D, the intersection point of the center line of described spark plug and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.05D.
According to some embodiments of the present invention, the laterally vertically central cross-section of described pit comprises according to the first arc section, the second arc section and the changeover portion that is connected between described first arc section and described second arc section, described first arc section is corresponding with described spark plug, described second arc section is corresponding with described diesel injector, and the radius of curvature of wherein said first arc section is greater than the radius of curvature of described second arc section.
According to some embodiments of the present invention, the radius of curvature of described first arc section is between 18-20mm, and the radius of curvature of described second arc section is between 16-18mm, and the radius of curvature of described changeover portion is between 9-11mm.
According to some embodiments of the present invention, the end face of described piston is provided with two exhaust valves and dodges recess and two intake valves dodge recess, described two exhaust valves are dodged between recess and described two intake valves are dodged between recess and all connected by piston circular arc camber, and the exhaust valve of homonymy is dodged recess and dodged between recess with intake valve and be connected by piston inclined-plane; And
Described fovea superior structure is configured with fovea superior structure arc section and two sections of fovea superior structure bevel phase, described fovea superior structure arc section is corresponding up and down with described two piston circular arc cambers respectively, and described two sections of fovea superior structure bevel phase are corresponding with described two piston inclined-planes respectively.
According to some embodiments of the present invention, the described fovea superior structure arc section same center of circle corresponding to described piston-top surface circular arc camber, described piston inclined-plane is parallel to each other with corresponding described fovea superior structure bevel phase.
Accompanying drawing explanation
Fig. 1 be according to an edge of the body group part of the embodiment of the present invention be orthogonal to Crankshaft to and by the vertical section figure of cylinder centerline;
Fig. 2 is the partial enlarged drawing in Fig. 1;
Fig. 3 is a longitudinal cross-section partial schematic diagram of the body group part according to the embodiment of the present invention;
Fig. 4 is the stereogram of piston;
Fig. 5 is diesel injector, location diagram between spark plug and cylinder centerline.
Embodiment
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of the instruction such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristics.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or D score can comprise the first and second features and directly contact, also can comprise the first and second features and not be directly contact but by the other characterisation contact between them.And, fisrt feature second feature " on ", " top " and " above " comprise fisrt feature directly over second feature and oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " comprise fisrt feature immediately below second feature and tiltedly below, or only represent that fisrt feature level height is less than second feature.
The motor according to the embodiment of the present invention is described in detail below with reference to Fig. 1-Fig. 5.
Motor generally can comprise distribution device, connecting rod, supply system, ignition system, cooling system and lubrication system etc.
Wherein, the function of connecting rod is the torque combustion gas power acted on piston 3 being changed into bent axle, with to work mechanism output mechanical energy.Usually, connecting rod mainly comprises piston connecting rod unit, crankshaft-flywheel group and body group.
Piston connecting rod unit changes the to-and-fro motion of piston 3 rotary motion of bent axle into, the power acted on piston 3 is changed into the torque that bent axle externally exports simultaneously, thus drives the vehicle wheel rotation of vehicle.Usually, piston connecting rod unit comprises piston 3, piston ring, wrist pin and connecting rod etc., and wrist pin is for connecting piston 3 and connecting rod.Crankshaft-flywheel group is formed primarily of bent axle and flywheel.
Body group is the support of motor, is the assembling matrix of each system major part of piston connecting rod unit, crankshaft-flywheel group, distribution device and motor.As shown in Figure 1, body group mainly comprises cylinder head 1, cylinder head gasket, cylinder block 2 and oil sump, cylinder head 1 is located at the end face of cylinder block 2, cylinder head gasket is folded between the bottom surface of cylinder head 1 and the end face of cylinder block 2, for the gap between blanket gas cylinder cap 1 and cylinder block 2, oil sump is arranged on the bottom of cylinder block 2.In describing the invention, the longitudinal direction of motor (or body group) refers to the length direction of motor, the transverse direction of motor (or body group) refers to thickness (width) direction of motor, and the short transverse of motor (or body group) refers to the direction of the center line being parallel to cylinder.
Cylinder block 2 has at least one cylinder, and cylinder to move wherein the cylindrical cavity carrying out leading for piston 3, and cylinder is generally formed in the first half of cylinder block 2, and the Lower Half of cylinder block 2 can be generally crankcase, but is not limited thereto.For straight engine, its multiple cylinder is juxtaposed along the vertical center line of motor, and namely multiple cylinder is in alignment along the longitudinal arrangement of motor.For V-type motor, it is generally divided into two groups of cylinders, and the angle between these two groups of cylinders generally between 30 °-60 °, but is not limited thereto.
Be formed with the intake duct corresponding with each cylinder and air outlet flue in cylinder head 1, intake duct is used for firing chamber transferring oil gas mixture (or air), and air outlet flue is used for combustion gas.Usually, two can be adopted to enter scene 2 air flue form, namely intake duct and air outlet flue are two, but be not limited thereto, three such as can also be adopted to enter scene 2 or one-in-and-one-out, for the ordinary skill in the art, can according to actual needs and the internal structure of cylinder head 1 and adaptive settings.
Distribution device is arranged in cylinder head 1, the effect of distribution device is the requirement according to the work cycle of carrying out in each cylinder of motor and firing order, time opening and closedown intake valve and exhaust valve, fresh momentum (such as gas mixture or air) is entered in cylinder in time, and waste gas is discharged in time from cylinder.
Distribution device mainly comprises valve group and valve transmission group part, valve group generally comprises air inlet side valve (abbreviation intake valve) and exhaust side valve (abbreviation exhaust valve), and intake valve and exhaust valve can be opened, close respectively by its timing of independent camshaft actuated.Camshaft can link with the bent axle of motor, can adopt the various ways such as gear transmission, Chain conveyer or V belt translation between camshaft and motor.
Wherein, for four stroke engine, at least corresponding intake valve of each cylinder and an exhaust valve, usually, the quantity of intake valve is identical with the quantity of intake duct, and the quantity of exhaust valve is identical with the quantity of air outlet flue.Such as, two can be adopted to enter scene 2 Four valve structure, or three enter scene 2 five air valve structure, one-in-and-one-out two air valve structure can certainly be adopted.Intake valve in each firing chamber and exhaust valve by the driving of corresponding camshaft thus according to certain rule partially unrolling, thus fill into gas mixture (or fresh air) in time in firing chamber, and are discharged by waste gas in time after burning work done.
The function of spark plug 5 is that the high-tension electricity produced by spark coil introduces firing chamber, and produces electrical spark between two electrodes, thus lights inflammable mixture, and spark plug 5 mainly can be made up of centre electrode, lateral electrode, housing and insulator etc.In some embodiments of the invention, each cylinder correspondence arranges a spark plug 5, and this spark plug 5 can adopt the mode be threaded to be fixed on the corresponding position of cylinder head 1.
Gasoline ejector is used for injected petrol fuel, in an embodiment of the present invention, does not make particular determination to the concrete setting position of gasoline ejector.Such as, gasoline ejector can be (that is, multi-point injection) one to one with the quantity of cylinder, and gasoline ejector can be arranged on the front that fuel also directly can be sprayed into by cylinder head 1 intake valve of corresponding cylinder.Certainly, gasoline ejector also can corresponding multiple cylinder (that is, single-point discharge), and this oil sprayer can be arranged in the section before closure, can flow in air intake branch after fuel sprays into air, and distributes to each cylinder respectively.
Diesel injector 4 is for spraying diesel fuel, and diesel injector 4 can be arranged in cylinder head 1, and the nozzle segment of diesel injector 4 can be positioned at corresponding firing chamber.In some embodiments of the invention, each cylinder correspondence arranges a diesel injector 4.
Should be understood that, about the concrete structure of diesel injector 4 and gasoline ejector, working principle and relevant oil supply system etc., be all well known for ordinary skill in the art for prior art, therefore repeat no longer one by one here.
Wherein, as optional mode of execution, the all corresponding gasoline ejector in each firing chamber and a diesel injector 4, and this gasoline ejector and this diesel injector 4 can be integrated as a whole, this unit injector can have a nozzle, when needs injected petrol for injected petrol, when needs spray diesel oil then for spraying diesel oil.Or this unit injector also can have two nozzles, one for injected petrol, another is for spraying diesel oil, two nozzle mutual noninterferences.In these embodiments, the Fuel Petroleum of gasoline ejector ejection is directly injected in firing chamber, and without air intake branch or intake duct, different from the multi-point injection of above-mentioned gasoline ejector and the set-up mode of single-point discharge.
Owing to having according to the motor of the embodiment of the present invention for spraying the diesel injector 4 of diesel oil and the gasoline ejector for injected petrol, therefore gasoline, diesel duel fuel engine (abbreviation duel fuel engine) also can be referred to as according to the motor of the embodiment of the present invention.
According to the duel fuel engine of the embodiment of the present invention, when piloting engine, ignition start can be carried out by spark plug 5 mode of igniting.And after duel fuel engine normal starting, can work in compression ignite mode by spraying diesel oil, now spark plug 5 can quit work.Thus, make, according to the duel fuel engine of the embodiment of the present invention compared to diesel engine, effectively to reduce discharge when starting, especially for the problem of diesel engine cold-starting difficulty, can be started smoothly by ignition way.After starting according to the duel fuel engine of the embodiment of the present invention, can be replaced the ignition way of spark plug 5 by compression ignite mode, high compression ratio contributes to Thorough combustion thus, improves fuel economy and the Power output performance of motor.
In addition, according to the motor of the embodiment of the present invention because normal working stroke circulation time spark plug 5 can quit work, spark plug 5 can only be lighted a fire when starting, therefore the ignition times of spark plug 5 can be greatly reduced, improve the working life of spark plug 5, reduce user cost, also simplify control strategy simultaneously.
But, it should be noted that, the above-mentioned starting process about the duel fuel engine according to the embodiment of the present invention and normal stroke circulation are only schematically illustrate, can not be interpreted as it is to one restriction of the present invention, or imply that motor of the present invention only can start or more in the above described manner and state the work of mode normal circulation.
With reference to shown in Fig. 1 and Fig. 3, bottom surface according to the cylinder head 1 of the embodiment of the present invention adopts non-planar structure, specifically, the underside portion of the corresponding cylinder of cylinder head 1 is formed with fovea superior structure 13, in other words, for four-cylinder in upright arrangement, the bottom surface of this cylinder head 1 can have four fovea superior structures 13, the corresponding cylinder of each fovea superior structure 13.
Thus, owing to adopting non-planar structure, be different from the flat-bottom structure of conventional diesel, therefore based on petrol engine, namely can transform as prototype using petrol engine according to the motor of the embodiment of the present invention.
Be understandable that, above-mentioned " fovea superior structure 13 " can adopt the fovea superior structural type of the corresponding each cylinder in cylinder head 1 bottom surface in conventional gasoline machine.Here particular determination is not done for fovea superior structure 13.
Further, the end face of piston 3 has the shape suitable with fovea superior structure 13.Here, it should be noted that, end face and the suitable line style that can be understood as the two of the shape of fovea superior structure 13 of piston 3 are identical or substantially identical, the end face of such as piston 3 can have circular arc camber, then fovea superior structure 13 corresponding part is also formed as circular arc camber, and the radius of curvature of these two circular arc cambers corresponded to each other can be equal or substantially equal, and for example the end face of piston 3 also can form beveled region, then fovea superior structure 13 corresponding part is also formed as beveled region, and these two beveled region corresponded to each other can be parallel or substantially parallel.
Bottom surface due to the cylinder head 1 according to the embodiment of the present invention is non-flat-bottom structure, namely upper female type (corresponding cylinder portion) is adopted, therefore piston 3 when top dead center easily and valve interfere, distribution device may be caused normally to work, and then cause valve normally not open and close.
In view of this, according to some embodiments of the present invention, the end face of piston 3 is provided with and dodges recess for what dodge valve.Specifically, as Fig. 4 and shown in composition graphs 1 and Fig. 3, the end face of piston 3 is provided with two exhaust valves and dodges recess 35 and two intake valves dodge recess 36, two exhaust valves are dodged between recess 35 and are connected by piston circular arc camber 34, and being namely connected to that two exhaust valves dodge between recess 35 is a circular arc camber.Similarly, two intake valves are dodged between recess 36 and are also connected by piston circular arc camber 34, and being namely connected to that two intake valves dodge between recess 36 is also a circular arc camber, and these two circular arc cambers can be symplex structures.
Further, the exhaust valve of homonymy is dodged recess 35 and is dodged between recess 36 with intake valve and be connected by piston inclined-plane 32.In other words, as Fig. 4 and shown in composition graphs 1, exhaust valve on the left of being positioned at is dodged recess 35 and is dodged recess 36 by a ramp structure (namely with the intake valve being positioned at left side, piston inclined-plane 32) transition, similarly, exhaust valve on the right side of being positioned at is dodged recess 35 and is dodged recess 36 also by a ramp structure (that is, piston inclined-plane 32) transition with the intake valve being positioned at right side, and these two ramp structures also can be symplex structures.
Accordingly, as shown in figures 1 and 3, fovea superior structure 13 is configured with fovea superior structure arc section 12 and two sections of fovea superior structure bevel phase 11, wherein fovea superior structure arc section 12 is corresponding with two piston circular arc cambers about 34.
As shown in Figure 1, it is corresponding with the piston inclined-plane about 32 that the intake valve in left side is dodged between recess 36 that recess 35 dodged by fovea superior structure bevel phase 11 and the exhaust valve in left side, and it is corresponding with the piston inclined-plane about 32 that the intake valve on right side is dodged between recess 36 that recess 35 dodged by another fovea superior structure bevel phase 11 and the exhaust valve on right side.
Thus, piston 3 end face can match with fovea superior structure 13 well, effectively utilizes head space, and the compression height of piston 3 is reduced, and the weight saving of piston 3, thus the frictional loss decreasing piston connecting rod unit, improve the thermal efficiency of motor.
As preferred embodiment, the fovea superior structure arc section 12 same center of circle corresponding to piston circular arc camber 34, namely the radius of curvature of the two is equal.Similarly, piston inclined-plane 32 is parallel to each other with corresponding fovea superior structure bevel phase 11.Thus, piston 3 end face is coordinated better with fovea superior structure 13, thus reduce the compression height of piston 3 further, improve the thermal efficiency of motor.
Shown in composition graphs 1 and Fig. 4, the middle section of the end face of piston 3 is formed with pit 31, pit 31 comprises first fiery pit portion 311 and second point fiery pit portion 312, thus, make firing chamber can form two ignition centers, make fuel can shorten flame travel in combustion, improve the velocity of combustion of fuel, avoid the generation of pinking and the generation of soot, improve fuel consumption rate.As shown in Figure 1, spark plug 5 and diesel injector 4 all adopt the arrangement of offset cylinder center line A (Fig. 5), namely the center line of spark plug 5 does not overlap with the center line A of corresponding cylinder, similarly, the center line of diesel injector 4 does not also overlap with the center line A of corresponding cylinder.Wherein, corresponding first fiery pit portion 311 of spark plug 5 and diesel injector 4 corresponding second point fiery pit portion 312, make spark plug 5 and diesel injector 4 can two ignition center adaptations better thus, propagation of flame distance can be shortened, ensure fuel atomizing effect, reduce the tendency that detonation occurs, improve the combustion efficiency of motor.
In some embodiments of the invention, the center line of diesel injector 4 and the centerline parallel of cylinder, namely the cylinder of the orthogonal correspondence of diesel injector 4 is arranged.Further, as shown in Figure 5, the intersection point of the center line of diesel injector 4 and the bottom surface of cylinder head 1 is to the distance of the centre line L 2 of cylinder within 0.15D, i.e. L2≤0.15D, preferably within 0.1D.Wherein D is the diameter (internal diameter) of cylinder, as shown in Figure 1.
Such as, in one embodiment, cylinder bore D can be about 80mm, the intersection point of the center line of diesel injector 4 and the bottom surface of cylinder head 1 to the distance of the center line A of cylinder greatly about about 10mm, but the present invention is not limited to this.
Thus, diesel injector 4 is arranged near center line, diesel oil oil bundle can be distributed in firing chamber relatively uniformly, reduce each oily Shu Changdu and differ and cause mixed gas lack of homogeneity, thus improve burning.
In one embodiment, the intersection point of the center line of spark plug 5 and the bottom surface of cylinder head 1 is to the distance of the center line A of cylinder within 0.075D, i.e. L1≤0.075D, preferably within 0.05D.
Such as in one embodiment, cylinder bore D can be 80mm, and the intersection point of the center line of spark plug 5 and the bottom surface of cylinder head 1 approximately can be about 4mm to the distance of center line, but the present invention is not limited to this.
In brief, some preferred embodiment in, the center line of spark plug 5 and the intersection point of cylinder head 1 bottom surface to cylinder centerline A distance compared with the center line of diesel injector 4 and the intersection point of cylinder head 1 bottom surface want near to the distance of cylinder centerline A.Thus, make spark plug 5 compacter with the layout of diesel injector 4, make full use of the free space in cylinder head 1, can also coordinate with two ignition centers better simultaneously, improve firing effect.
Inventor finds, for conventional engines, and the general layout placed in the middle of its spark plug 5, and the center line of spark plug 5 overlaps with the center line of cylinder.And in the application, spark plug 5 is biased arranges, therefore angle is set produces certain impact to flame area spreading rate and rate of burning of spark plug 5.
Inventor finds, be obliquely installed by spark plug 5 and can improve this situation, therefore in one embodiment of the invention, spark plug 5 is obliquely installed relative to the cylinder of this spark plug 5 correspondence, namely the center line of spark plug 5 and the center line of cylinder are uneven, as shown in Figure 5.
Further, in certain embodiments, as shown in Figure 5, the center line of spark plug 5 and the angle α of the center line of corresponding cylinder are between 15 °-25 °.Thus, can improve flame area spreading rate and rate of burning, balanced flame travel, effectively avoids pre-ignition, also facilitates motor to clean waste gas simultaneously, improves ignition difficulties problem better.
As preferred embodiment, the center line of spark plug 5 and the angle α of the center line of corresponding cylinder are between 18 °-22 °.Thus, liquid fuel not only can be effectively avoided to collide spark plug 5 and supply the mixed gas of overrich to spark plug 5 and on spark plug 5, form carbon distribution, be beneficial to simultaneously and improve flame area spreading rate and rate of burning, balanced flame travel, thus avoid pre-ignition better.
Arrange because diesel injector 4 and spark plug 5 are all biased, the line style in therefore corresponding with diesel injector 4 second point fiery pit portion 312 and first the fiery pit portion 311 corresponding with spark plug 5 has remarkable impact to combustion efficiency.
In one embodiment, as shown in Figure 2, the laterally vertical central cross-section of pit 31 comprises the first arc section 331, second arc section 332 and is connected to the changeover portion 333 between the first arc section 331 and the second arc section 332.Wherein, " laterally vertically central cross-section " here refer to the center line A by corresponding cylinder and be orthogonal to Crankshaft to vertical section.
First arc section 331 is corresponding with spark plug 5, and the second arc section 332 is corresponding with diesel injector 4, and wherein the first arc section 331 is the line style of center, portion 311, first fiery pit, and the second arc section 332 is the line style of center, portion 312, second point fiery pit.As preferred embodiment, the radius of curvature r1 of the first arc section 331 is greater than the radius of curvature r2 of the second arc section 332.
Inventor finds, the line style parameter of the first arc section 331, second arc section 332 and changeover portion 333 is directly connected to the thermal efficiency of motor and the performance of motor, and therefore this line style of three sections of reasonable design has direct relation for combustion efficiency, flame travel, velocity of combustion and pinking situation.
In view of this, inventor finds, by the radius of curvature r1 of the first arc section 331 is set to 18-20mm, the radius of curvature r2 of the second arc section 332 is set to 16-18mm, the radius of curvature r3 of changeover portion 333 is set to 9-11mm, thus make two some fiery pits portion (i.e. two ignition centers) effectively can shorten flame travel in fuel combustion process, improve the velocity of combustion of fuel, avoid the generation of pinking and the generation of soot, and adaptive two incendiary sources better, improve fuel consumption rate.
Wherein, in an optional embodiment, changeover portion 333 can adopt the circular arc of about 10mm to carry out transition.
Generally speaking, according to the motor of the embodiment of the present invention, by the end face of piston 3 is designed to fovea superior structure 13 suitable, make the high compression ratio according to the motor of the embodiment of the present invention with similar diesel engine, the pit 31 of piston 3 is formed with two ignition centers, ensure that the demand using spark plug 5 and diesel injector 4 two incendiary sources under different operating mode respectively, propagation of flame distance can be shortened, ensure fuel atomizing effect, reduce the tendency that detonation occurs, piston 3 make use of the fovea superior structure 13 of cylinder head 1 well simultaneously, make piston 3 end face can give prominence to the bottom surface (remaining part of removing fovea superior structure 13) of cylinder block 2, the compression height of piston 3 is reduced relatively, effectively reduce the overall dimensions of piston 3, make the quality of piston 3 closer to petrol engine, make the reciprocal inertia force of piston crank mechanism reduce further simultaneously, the frictional work of motor is reduced further, effectively raise the thermal efficiency of motor, reduce emission effect.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.In addition, the different embodiment described in this specification or example can carry out engaging and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a motor, is characterized in that, comprising:
Connecting rod, described connecting rod comprises body group, piston connecting rod unit and crankshaft-flywheel group, in the cylinder block of described body group, there is at least one cylinder, the underside portion of the corresponding cylinder of described cylinder head is formed as fovea superior structure, the end face of the piston of described piston connecting rod unit has the shape suitable with described fovea superior structure and the middle section of the end face of described piston is formed with pit, and described pit comprises first fiery pit portion and second point fiery pit portion;
Spark plug, each described cylinder correspondence arranges a described spark plug;
Diesel injector, each described cylinder correspondence arranges a described diesel injector, the centerline offset of the described spark plug described cylinder relative to described diesel injector that wherein each described cylinder is corresponding is arranged, and corresponding described first fiery pit portion of described spark plug and the corresponding described second point fiery pit portion of described diesel injector; And
For the gasoline ejector of injected petrol fuel.
2. motor according to claim 1, is characterized in that, the center line of described diesel injector and the centerline parallel of described cylinder.
3. motor according to claim 2, is characterized in that, the intersection point of the center line of described diesel injector and the bottom surface of described cylinder head is to the distance of the center line of described cylinder within 0.15D, and wherein D is the diameter of cylinder.
4. motor according to claim 3, is characterized in that, the centerline dip of the relatively described cylinder of described spark plug arrange and the angle of the center line of the center line of described spark plug and described cylinder between 15 °-25 °.
5. motor according to claim 4, is characterized in that, the intersection point of the center line of described spark plug and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.075D.
6. motor according to claim 5, it is characterized in that, the intersection point of the center line of described diesel injector and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.1D, the intersection point of the center line of described spark plug and the bottom surface of described cylinder head to the distance of the center line of described cylinder within 0.05D.
7. motor according to claim 5, it is characterized in that, the laterally vertically central cross-section of described pit comprises according to the first arc section, the second arc section and the changeover portion that is connected between described first arc section and described second arc section, described first arc section is corresponding with described spark plug, described second arc section is corresponding with described diesel injector, and the radius of curvature of wherein said first arc section is greater than the radius of curvature of described second arc section.
8. motor according to claim 7, is characterized in that, the radius of curvature of described first arc section is between 18-20mm, and the radius of curvature of described second arc section is between 16-18mm, and the radius of curvature of described changeover portion is between 9-11mm.
9. motor according to claim 1, it is characterized in that, the end face of described piston is provided with two exhaust valves and dodges recess and two intake valves dodge recess, described two exhaust valves are dodged between recess and described two intake valves are dodged between recess and all connected by piston circular arc camber, and the exhaust valve of homonymy is dodged recess and dodged between recess with intake valve and be connected by piston inclined-plane; And
Described fovea superior structure is configured with fovea superior structure arc section and two sections of fovea superior structure bevel phase, described fovea superior structure arc section is corresponding up and down with described two piston circular arc cambers respectively, and described two sections of fovea superior structure bevel phase are corresponding with described two piston inclined-planes respectively.
10. motor according to claim 1, is characterized in that, the described fovea superior structure arc section same center of circle corresponding to described piston circular arc camber, and described piston inclined-plane is parallel to each other with corresponding described fovea superior structure bevel phase.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355297A (en) * | 2017-07-31 | 2017-11-17 | 天津大学 | A kind of engine chamber for using Fuel Petroleum burning instead suitable for diesel engine |
| CN114165352A (en) * | 2021-12-17 | 2022-03-11 | 中国船舶重工集团公司第七一一研究所 | Piston, combustion chamber assembly and method of organizing combustion |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0839997A1 (en) * | 1996-10-31 | 1998-05-06 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber structure having piston cavity |
| JPH11182247A (en) * | 1997-12-17 | 1999-07-06 | Fuji Heavy Ind Ltd | Combustion chamber structure for direct injection type engine |
| US6095114A (en) * | 1998-05-11 | 2000-08-01 | Honda Giken Kogyo Kabushiki Kaisha | Gasoline direct-injection engine |
| JP2001193512A (en) * | 2000-01-11 | 2001-07-17 | Hiromasa Kitaguchi | Engine having functions of gasoline and diesel |
| CN101413422A (en) * | 2008-11-28 | 2009-04-22 | 江苏大学 | Direct spraying natural gas two-air valve engine underpressure layered combustion chamber structure in cylinder |
| CN103696847A (en) * | 2012-09-28 | 2014-04-02 | 重庆长安汽车股份有限公司 | In-cylinder direct injection engine combustion chamber |
-
2014
- 2014-04-29 CN CN201410177640.XA patent/CN105019998B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0839997A1 (en) * | 1996-10-31 | 1998-05-06 | Fuji Jukogyo Kabushiki Kaisha | Combustion chamber structure having piston cavity |
| JPH11182247A (en) * | 1997-12-17 | 1999-07-06 | Fuji Heavy Ind Ltd | Combustion chamber structure for direct injection type engine |
| US6095114A (en) * | 1998-05-11 | 2000-08-01 | Honda Giken Kogyo Kabushiki Kaisha | Gasoline direct-injection engine |
| JP2001193512A (en) * | 2000-01-11 | 2001-07-17 | Hiromasa Kitaguchi | Engine having functions of gasoline and diesel |
| CN101413422A (en) * | 2008-11-28 | 2009-04-22 | 江苏大学 | Direct spraying natural gas two-air valve engine underpressure layered combustion chamber structure in cylinder |
| CN103696847A (en) * | 2012-09-28 | 2014-04-02 | 重庆长安汽车股份有限公司 | In-cylinder direct injection engine combustion chamber |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355297A (en) * | 2017-07-31 | 2017-11-17 | 天津大学 | A kind of engine chamber for using Fuel Petroleum burning instead suitable for diesel engine |
| CN107355297B (en) * | 2017-07-31 | 2022-12-09 | 天津大学 | Engine combustion chamber suitable for gasoline fuel combustion instead of diesel engine |
| CN114165352A (en) * | 2021-12-17 | 2022-03-11 | 中国船舶重工集团公司第七一一研究所 | Piston, combustion chamber assembly and method of organizing combustion |
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| CN105019998B (en) | 2018-03-06 |
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Effective date of registration: 20201223 Address after: No.868, Gangxing Road, Yangzhong Economic Development Zone, Yangzhong City, Zhenjiang City, Jiangsu Province, 212200 Patentee after: Honeycomb power system (Jiangsu) Co.,Ltd. Address before: 071000 No. 2266 Chaoyang South Street, Hebei, Baoding Patentee before: Great Wall Motor Co.,Ltd. |