CN104712417A - Gas inlet device of engine - Google Patents
Gas inlet device of engine Download PDFInfo
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- CN104712417A CN104712417A CN201410784534.8A CN201410784534A CN104712417A CN 104712417 A CN104712417 A CN 104712417A CN 201410784534 A CN201410784534 A CN 201410784534A CN 104712417 A CN104712417 A CN 104712417A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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Abstract
A gas inlet device of an engine of an engine unit is disclosed. The engine unit comprises an engine, a cylinder block, a cylinder cover and a gas inlet device of the engine, wherein the cylinder block is provided with a cylinder which forms a combustion chamber; the cylinder cover is connected to one end of the cylinder block to form the top part of the combustion chamber, and the cylinder cover is provided with a gas inlet which guides a combustion gas into the combustion chamber; and the gas inlet device of the engine supplies the combustion gas formed by mixing air and fuel to the gas inlet of the engine through a main gas inlet channel. The gas inlet device of the engine comprises a gas input adjusting mechanism which comprises an auxiliary gas inlet channel. The auxiliary gas inlet channel is separated from the main gas inlet channel and is used for adjusting the air input of the gas inlet. The auxiliary gas inlet channel has an inlet and an outlet, wherein the inlet is arranged in the main gas inlet channel, and the outlet is arranged in the gas inlet of the engine.
Description
Technical field
The present invention relates to a kind of air intake apparatus of engine, this air intake apparatus strengthens the In-Cylinder Flow of the firing chamber combustion gas at engine.
Background technique
In the conventional technology, a kind of air intake apparatus of engine has been proposed, this air intake apparatus by strengthen the firing chamber combustion gas of engine In-Cylinder Flow (eddy current in cylinder and/or roll stream) and stir these combustion gas, improve the combustion efficiency of combustion regime and raising engine.
Such as, patent documentation 1 (Japan is flat opens patent No.2005-351235) discloses a kind of air intake apparatus of engine, and wherein, intake manifold is connected to the suction port be formed in the cylinder head of engine.The multiple secondary gas-entered passageway that air flows via it, and the main gas-entered passageway that fuel-air mixture flows wherein is formed in cylinder head and intake manifold, and the air quantity flowing through multiple secondary gas-entered passageway is also controlled by the on/off operation of the air intake control valve be arranged in main gas-entered passageway (air throttle), thus produces In-Cylinder Flow in the firing chamber of engine.
Patent documentation 2 (Japan is flat opens patent No.7-324628) discloses a kind of air intake apparatus of engine, wherein, the throttle body being rotatably provided with the valve element (air throttle) of cylindricality is in fact installed to the cylinder head being formed with suction port, and by the rotational position of control valve element, air inlet is impelled unevenly to flow in suction port, to produce the In-Cylinder Flow of fuel-air mixture in firing chamber.
In addition, in the air intake apparatus of traditional engine, propose a kind of structure, wherein, swirl control valve is mounted the eddy current to produce fuel-air mixture in the firing chamber of engine.
But in the air intake apparatus of the engine in patent documentation 1, because multiple gas-entered passageway is formed in cylinder head and intake manifold, the shape of flow channel becomes complicated, causes cost of production to rise.In addition, intake manifold has the structure of heavy wall, causes higher weight and cost.
In the air intake apparatus of the engine in patent documentation 2, air throttle has complicated shape, causes higher cost.In addition, intake resistance also becomes excessive, thus the output performance of engine reduces.
In addition, in the air intake apparatus of engine comprising dedicated swirl control valve, use more multicompartment, cause cost to increase.Intake resistance also becomes excessive, thus the output performance of engine reduces.
Summary of the invention
The present invention considers above-mentioned situation, and the object of this invention is to provide a kind of air intake apparatus of engine, this air intake apparatus can by the In-Cylinder Flow of enhanced burning gas, stir combustion gas to improve the combustion efficiency of combustion regime and raising engine, and improve velocity of combustion and do not increase cost.
On the one hand, can be realized by a kind of air intake apparatus of engine of engine unit according to above-mentioned and other object of the present invention, this engine unit comprises: engine; Cylinder block, this cylinder block is provided with the cylinder forming firing chamber; Cylinder head, this cylinder head links one end of cylinder block, forms the top portion of firing chamber, and this cylinder head is provided with suction port combustion gas guiding being entered firing chamber; These combustion gas produced by mixing air and fuel are fed to the suction port of engine by the air intake apparatus of this engine by main gas-entered passageway;
Wherein, the air intake apparatus of this engine comprises air inflow controlling mechanism, this air inflow controlling mechanism comprises secondary gas-entered passageway from main gas-entered passageway branch and for regulating the supply of the air entering suction port, and this secondary gas-entered passageway is configured to the flow channel sectional area that its flow channel sectional area is less than main gas-entered passageway, this secondary gas-entered passageway has entrance and exit, this entrance is arranged at main gas-entered passageway, and this outlet is arranged at the suction port of engine.
In another aspect of the present invention, also provide a kind of air intake apparatus of engine of engine unit, this engine unit comprises: engine; Cylinder block, this cylinder block is provided with the cylinder forming firing chamber; Cylinder head, this cylinder head is attached to one end of cylinder block, forms the top portion of firing chamber, and this cylinder head is provided with for combustion gas being guided the suction port entering firing chamber; These combustion gas produced by mixing air and fuel are fed to the suction port of engine by the air intake apparatus of this engine by the main gas-entered passageway of throttle body and the main gas-entered passageway of suction tude;
Wherein, the air intake apparatus of this engine comprises air inflow controlling mechanism, this air inflow controlling mechanism comprises secondary gas-entered passageway from main gas-entered passageway branch and for regulating the supply of the air entering suction port, and this secondary gas-entered passageway is configured to the flow channel sectional area that its flow channel sectional area is less than main gas-entered passageway, this secondary gas-entered passageway has entrance and exit, this entrance is arranged at the main gas-entered passageway of throttle body, and this outlet is arranged at the main gas-entered passageway of suction tude.
Following preferred embodiment can be taked in above-mentioned aspect of the present invention.
The secondary gas-entered passageway of air inflow controlling mechanism is set as the below of the top surface of elongation line in the top portion of the firing chamber of engine making the center line exported.
The secondary gas-entered passageway of air inflow controlling mechanism is set as, when the suction valve of the suction port of switch engine is standard-sized sheet, makes the elongation line of the center line of outlet through the top of the head part of suction valve.
It is desirable that, spark plug is installed in the cylinder head of engine, spark plug is stretched out from firing chamber, and the secondary gas-entered passageway of air inflow controlling mechanism is set as the elongation line of center line exported roughly is intersected with the end of spark plug.
The secondary gas-entered passageway of air inflow controlling mechanism is set as making the elongation line of the center line exported in the worm's eye view of engine through the position away from the center of the firing chamber of engine.
The secondary gas-entered passageway of air inflow controlling mechanism is set as making the opening diameter exported be less than the opening diameter of entrance.
Desirably, air inflow controlling mechanism comprises: as the branched bottom of secondary gas-entered passageway, this branched bottom is configured to be communicated with downstream side with the upstream side of the air throttle be configured in main gas-entered passageway, and air inflow controlling mechanism is ISC mechanism, the rotating speed of this ISC mechanism by regulating the air quantity of the secondary gas-entered passageway of engine when idle running to control the idle running of engine.
Above-mentioned air intake apparatus is preferred for the engine of pedal motorcycle.
The characteristic that above-mentioned aspect according to the present invention is mentioned, the secondary gas-entered passageway of the air inflow controlling mechanism of air intake apparatus (system) is set to the flow channel sectional area that its flow channel sectional area is less than main gas-entered passageway, entrance is arranged at main gas-entered passageway, and outlet is arranged at the suction port of engine.Therefore, by controlling by air inflow controlling mechanism the air quantity being fed to suction port from secondary gas-entered passageway rightly, the air of injection can be transported to the region around the firing chamber of engine, and need not increase special assembly.Therefore, by the In-Cylinder Flow of enhanced burning gas, stir combustion gas, can combustion regime be improved, and improve the combustion efficiency of engine, thus improve velocity of combustion and do not increase cost.
Essence of the present invention and further characteristic element will be described with reference to the drawings in the following description, and other advantage of the present invention, effect and function will be illustrated hereinafter.
Accompanying drawing explanation
Fig. 1 is the stereogram of display from the angle of pedal motorcycle during oblique rear, and an embodiment according to the air intake apparatus of engine of the present invention is applied to this pedal motorcycle;
Fig. 2 is the left view at the rear portion of the pedal motorcycle shown in Fig. 1, and wherein frame cover is removed by from this pedal motorcycle;
Fig. 3 be display Fig. 2 in the foundation of the part as engine and the left view of engine intake;
Fig. 4 is the view on the arrow IV in Fig. 3;
Fig. 5 is the sectional view along the V-V line in Fig. 4;
Fig. 6 is the sectional view along the line VI-VI in Fig. 5;
Fig. 7 is the sectional view along the line VII-VII in Fig. 3;
Fig. 8 is the sectional view along the line VIII-VIII in Fig. 7; And
Fig. 9 is the view being similar to Fig. 5 representing an alternative embodiment of the invention.
Embodiment
Below, illustrate for realizing embodiments of the invention with reference to accompanying drawing.Further attention, here, be used to refer to " direction " term " on ", D score, "left", "right" etc. with reference to accompanying drawing display or use under the state being installed to the motorcycle of standing.
As illustrated in fig. 1 and 2, the pedal motorcycle 10 as pedal motorcycle comprises bending beam type body shell 11.In this body shell 11, the lower pipe 13 of (single) steel extends from the rear portion of the head tube 12 be in advance part to the rear lower side.The cylindrical shape bridge pipe 14 extended in the vehicle width direction is connected to the rear and lower end of lower pipe 13.About a pair seat rail 15 extends obliquely rearwardly and upwardly from bridge pipe 14.
Tail bridge part 16 is formed between the rear end of about a pair seat rail 15.Connecting plate 17 is also arranged on the middle and lower part of body shell 11, to be fixed to bridge pipe 14 and seat rail 15, wherein in this middle and lower part, bridge pipe 14 and seat rail 15 intersected with each other.
Front suspension 18 is supported in head tube 12 with can to the right with to anticlockwise together with handlebar 19.Front-wheel 20 is in the lower end pivot of front suspension 18.On the other hand, engine unit 23 is pivotally supported on the connecting plate 17 of the middle and lower part of body shell 11 via engine suspension holdfast 22, with can vertical oscillation.
The normally used engine unit of pedal motorcycle is used as the engine unit 23 of the present embodiment.Engine unit 23 comprises the engine 24 and speed changer 25 installed integratedly.Trailing wheel 26 is in the direct pivot in the rear portion of speed changer 25.Such as, speed changer 25 is the stepless speed variator of predetermined engine speed by the energy conversion of engine 24.Rear damper unit 27 is formed between the rear portion of speed changer 25 and seat rail 15 vertically.This engine unit 23 and trailing wheel 26 are suspended by rear damper unit 27, thus vertical oscillation is absorbed.
Seat 28 is arranged on the top of the seat rail 15 in body shell 11 being opened.The article storage case that can store the helmet etc. do not shown is disposed in the below at seat 28, and the top of cylinder assembly 32 in engine unit described below 23.Fuel pot 29 is disposed in after article storage case.Article storage case and fuel pot 29 are supported by about a pair seat rail 15.The front portion of engine unit 23 and body shell 11 are covered by the frame cover 30 be made up of synthetic resin, thus improve outward appearance and protect internal component or component.
As shown in Figures 2 and 3, in engine 24, cylinder assembly 32 is configured to substantially substantially horizontal turn forward from the front side of crank box 31.Speed changer 25 arranges integratedly with the left side of crank box 31 thus extends back.Cylinder block 33, cylinder head 34 are in turn connected to form cylinder assembly 32 from crank box side with top cover 35.
Engine intake 37 as air intake apparatus is connected to the suction port 36 (Fig. 5) of cylinder head 34 and is disposed in the top of engine unit 23.Engine intake 37 is configured to produced the fuel-air mixture as combustion gas by fuel combination and air and fuel-air mixture is fed to suction port 36.As shown in Figures 2 to 4, engine intake 37 comprises air cleaner 38, outer pipe 39, throttle body 40, suction tude 41 and fuel injector 42.
As shown in Figure 5, suction tude 41 is connected to the suction port 36 of cylinder head 34, is also connected to throttle body 40.Throttle body 40 is connected to air cleaner 38 via outer pipe 39.Except purifying air of dust etc. is directed into throttle body 40 as air inlet in air cleaner 38.Throttle body 40 comprises air throttle 44, and this air throttle open and close is formed in the main gas-entered passageway 43 in throttle body 40.Throttle body 40 regulates the air mass flow (air inflow) being fed to the suction port 36 of cylinder head 34 by the main gas-entered passageway 45 of suction tude 41 described below according to the aperture of air throttle 44.
The main gas-entered passageway 45 be communicated with the suction port 36 of cylinder head 34 with the main gas-entered passageway 43 of throttle body 40 is formed in suction tude 41.Fuel injector 42 is also installed in suction tude 41.Fuel injector 42 enters the air (i.e. air inlet) flowing through main gas-entered passageway 45 produce fuel-air mixture by being sprayed by fuel towards suction port 36, and fuel-air mixture is fed to the suction port 36 of cylinder head 34 by the main gas-entered passageway 45 of suction tude 41.
Cylinder head 34 is connected to one end of cylinder block 33 as mentioned above.Cylinder block 33 comprises cylinder 47, and this cylinder forms firing chamber 46, as shown in Figure 7.Piston 48 (Fig. 5) is slidably received in cylinder 47.Piston 48 is connected to crankshaft 50, and this crankshaft is rotatably configured in crank box 31 via connecting rod 49.The to-and-fro motion (movement) of piston 48 changes the rotary motion (movement) of crankshaft 50 into by connecting rod 49.Although piston 48 is positioned at upper dead center in Figure 5, piston 48 is positioned at towards the position of lower dead centre away from upper dead center in the figure 7.
The firing chamber 46 of cylinder block 33 divides 51 to be communicated with the top of combustion chamber be formed in cylinder head 34.Further, as shown in Figure 5, in cylinder head 34, the suction port 36 dividing 51 to be communicated with top of combustion chamber and relief opening 52 with suction port 36 by suction valve 53 open and close and relief opening 52 formed by the mode of outlet valve 54 open and close.Suction valve 53 and outlet valve 54 are driven by the active force of cam (only showing air inlet side cam 55 in Fig. 5) via air inlet side Rocker arm 56 and exhaust side Rocker arm 57 respectively.Cam is driven rotatably by crankshaft 50.
As shown in Fig. 5,7 and 8, spark plug 58 is installed in cylinder head 34, thus faced by the end 58A of spark plug 58, top of combustion chamber divides 51.The top of combustion chamber being fed to cylinder head 34 from the opening operation of fuel-air mixture by suction valve 53 of engine intake 37, the suction port 36 by cylinder head 34 divides the firing chamber 46 of 51 and cylinder block 33.When spark plug 58 is lighted a fire around the upper dead center of piston 48, fuel-air mixture burning is to make piston 48 to-and-fro motion, thus rotary crank axle 50.The rotating force of crankshaft 50 changes the speed of speed changer 25 (Fig. 2) thus drives trailing wheel 26.
As shown in Fig. 2,3 and 5, outlet pipe 60 is connected to the relief opening 52 of cylinder head 34.Outlet pipe 60 extends back, and the rear end of outlet pipe 60 is connected to exhaust silencer 61, thus forms engine exhaust system 62.Be discharged in air by the relief opening 52 of cylinder head 34, outlet pipe 60 and exhaust silencer 61 in the opening operation of outlet valve 54 by the exhaust dividing combustion fuel in 51 and firing chamber 46-air mixture to produce at the top of combustion chamber shown in Fig. 5 and 7.Engine exhaust system 62 swings via engine suspension holdfast 22 together with engine unit 23 vertically with engine intake 37.
Engine intake 37 shown in Figure 4 and 5 comprises ISC (idle speed control) unit 65 as air inflow controlling mechanism, and this ISC unit enters by the suction port 36 of engine 24 amount of supplied air that top of combustion chamber divides 51 and firing chamber 46 for regulating.ISC unit 65 comprises secondary gas-entered passageway 66 as branched bottom and the valve system that do not show.ISC unit 65 has holds up in the whole engine speed scope internal control making of engine 24 the second function that first function of the rotating speed of the idle running of 24 and enhanced burning room 46 and top of combustion chamber divide the In-Cylinder Flow of the fuel-air mixture in 51.
Secondary gas-entered passageway 66 comprises the upstream side flow channel 67 and downstream side flow channel 68 that are interconnected.As illustrated in Figures 5 and 6, upstream side flow channel 67 to be formed in the shell 40A of throttle body 40 and with the upstream side communication of the air throttle 44 in main gas-entered passageway 43.As shown in FIG. 3 to 7, downstream side flow channel 68 comprises: coupling bar 69, and this coupling bar 69 is such as installed to the shell 40A of throttle body 40; Flexible pipe 70, this flexible pipe 70 is connected to coupling bar 69 and extends at engine 24 and engine intake 37 outside; ISC tunnel tube 71, this ISC tunnel tube 71 has the one end being connected to flexible pipe 70 and the other end be arranged in cylinder head 34; With ISC passage 72, this ISC passage 72 is communicated with ISC tunnel tube 71, and has the end of suction port 36 split shed in cylinder head 34.Downstream side flow channel 68 is communicated with the downstream side of air throttle 44, and ISC passage 72 is at suction port 36 split shed.
The valve system do not shown is installed in the shell 40A of throttle body 40.This valve system can regulate by changing valve opening the air quantity flowing through secondary gas-entered passageway 66 based on the instruction of the ECU do not shown (engine control unit).Namely, in the idle running of the in fact completely closed engine of air throttle 44, by regulating the air quantity being fed to suction port 36 through secondary gas-entered passageway 66, the first function of the valve system execution ISC unit 65 of ISC unit 65 controls to targeting engine rotating speed with the rotating speed of the idle running by engine 24.
Here, before the second function describing ISC unit 65, the secondary gas-entered passageway 66 comprising upstream side flow channel 67 and downstream side flow channel 68 is described in more detail.
That is, secondary gas-entered passageway 66 is set to the flow channel sectional area that its flow channel sectional area is less than the suction port 36 of the main gas-entered passageway 43 of throttle body 40, the main gas-entered passageway 45 of suction tude 41 and cylinder head 34.The entrance 66A (Fig. 5) of secondary gas-entered passageway 66 is the openings for being connected with main gas-entered passageway 43 in upstream side flow channel 67.The outlet 66B (Fig. 7 and 8) of secondary gas-entered passageway 66 is the openings for being connected with suction port 36 in the ISC passage 72 of downstream side flow channel 68.The opening diameter of the outlet 66B of secondary gas-entered passageway 66 is set to less than the opening diameter of the entrance 66A of secondary gas-entered passageway 66.
The elongation line P of the center line of the outlet 66B of secondary gas-entered passageway 66 is set to: this elongation line P be positioned to through the top of combustion chamber of cylinder head 34 divide the top surface 73 in 51 below and when suction valve 53 is fully opened as shown in Figure 7 through the top of the head part 53A of suction valve 53.In addition, the elongation line P of the center line of the outlet 66B of secondary gas-entered passageway 66 is set to the position of center Q dividing 51 and firing chamber 46 in the worm's eye view of engine 24 through top of combustion chamber, and intersected with the end 58A of spark plug 58 in fact by the valve rod 53B avoiding suction valve 53, as shown in Figure 8.
The valve system of ISC unit 65 performs the second function of ISC unit 65, so that: in as above layout, air stream is sprayed from the outlet 66B of secondary gas-entered passageway 66 by regulating based on the instruction of ECU the air inflow that flows through secondary gas-entered passageway 66 within the scope of the whole engine speed of engine 24 and enter top of combustion chamber and divide 51 and firing chamber 46, and strengthen and intensify top of combustion chamber and divide the In-Cylinder Flow of the fuel-air mixture in 51 and firing chamber 46 (that is, eddy current and roll stream).
According to structure and the structure of the invention described above, can realize and produce following effect and advantage (1) to (7).
(1) as best shown in figures 5 and 7, the secondary gas-entered passageway 66 of the ISC unit 65 in engine intake 37 is set to the flow channel sectional area that its flow channel sectional area is less than main gas-entered passageway 43 and 45, entrance 66A is arranged in the main gas-entered passageway 43 of throttle body 40, and exports 66B and be arranged in the suction port 36 of cylinder head 34.Therefore, the air quantity being fed to suction port 36 from secondary gas-entered passageway 66 is controlled rightly by the valve system of ISC unit 65, the top of combustion chamber that can be transported to engine 24 with the air of spray pattern divides the region around 51 and firing chamber 46, and need not increase special assembly.Therefore, divide the In-Cylinder Flow (tumble and swirl) of the fuel-air mixture in 51 and firing chamber 46 by strengthening at top of combustion chamber, stir this fuel-air mixture, can combustion regime be improved and improve the combustion efficiency of engine 24, thus improving velocity of combustion.
In addition, because ISC unit 65 is used to strengthen In-Cylinder Flow, and do not need to increase special assembly, so can cost increase be suppressed.
(2) because the elongation line P of center line of the outlet 66B of secondary gas-entered passageway 66 is set to the below dividing the upper surface 73 of 51 through the top of combustion chamber of cylinder head 34, the outlet 66B of secondary gas-entered passageway 66 can point to the inside that the firing chamber 46 of engine 24 and top of combustion chamber divide 51.Therefore, from air stream flowing in combustion chamber top portion 51 and the firing chamber 46 point-blank that the outlet 66B of secondary gas-entered passageway 66 sprays, and do not collide with the wall surface of suction port 36.Thus, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
(3) because the elongation line P of the center line of the outlet 66B of secondary gas-entered passageway 66 is set to the top of the head part 53A of the suction valve 53 under being in full open position, the air stream sprayed from the outlet 66B of secondary gas-entered passageway 66 flows directly into the firing chamber 46 of engine 34 and top of combustion chamber divides 51, and is not stopped by suction valve 53.Therefore, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
(4) as shown in Figure 8, because the elongation line P of the center line of the outlet 66B of secondary gas-entered passageway 66 is set to intersect with the end 58A of spark plug 58 in fact, from the end 58A of the empty air flow direction spark plug 58 that the outlet 66B of secondary gas-entered passageway 66 sprays, thus around end 58A, intensify the flowing of fuel-air mixture.Therefore, sufficient fuel-air mixture can be gathered in around the end 58A of spark plug 58 in the after-stage of the compression process of engine 24, and therefore, combustibility can be modified, even and if fuel is thin fuel-air mixture, this fuel also can reliably be burnt.
(5) because the elongation line P of the center line of the outlet 66B of secondary gas-entered passageway 66 is set in the worm's eye view of engine 24 through dividing the position of the center Q of 51 and firing chamber 46 away from top of combustion chamber, especially, eddy current can be divided in 51 and firing chamber 46 at top of combustion chamber by the air stream that sprays from the outlet 66B of secondary gas-entered passageway 66 and produces energetically.Therefore, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
(6) as best shown in figures 5 and 7, in secondary gas-entered passageway 66, the opening diameter of outlet 66B is set to less than the opening diameter of entrance 66A.Therefore, the flow velocity of the air stream sprayed from the outlet 66B of secondary gas-entered passageway 66 can be increased.Divide the air stream that the In-Cylinder Flow of the fuel-air mixture in 51 and firing chamber 46 can be injected to intensify further at the top of combustion chamber of engine 24, and the mixing effect of fuel-air mixture can be modified.
(7) as shown in Figs. 5 to 7, in the downstream side flow channel 68 of secondary gas-entered passageway 66, the coupling bar 69 being installed to the shell 40A of throttle body 40 is connected by the flexible pipe 70 such as extended in engine 24 and engine intake 37 outside with the ISC tunnel tube 71 being installed to cylinder head 34.Therefore, do not need to form complicated flow channel in the shell 40A of the throttle body 40 of engine intake 37 or the cylinder head 34 of engine 24, thus cost of production can be suppressed to increase.
Further, it is noted that the present invention is not limited to above-described embodiment, Fig. 9 is the view being similar to Fig. 5 representing another embodiment of the present invention, wherein represents same or similar assembly or parts with identical label.
In the description with reference to figure 5 and/or Fig. 7, with reference to figure 9, in this another embodiment, the outlet 66B of secondary gas-entered passageway 66 is arranged to towards the wall surface of the back side of the head part 53A of suction valve 53 or valve seat 74 or suction port 36.That is, because fuel is easily attached to the surface of these positions, fuel atomizing can by promoting from the outlet 66B of secondary gas-entered passageway 66 towards these position jet airstreams, and this contributes to the optimization of fuel and the improvement of fuel consumption.
In addition, the ISC passage 72 in the downstream side flow channel 68 of secondary gas-entered passageway 66 is arranged in suction tude 41, instead of in suction port 36.In this, in ISC passage 72, the outlet 66B of secondary gas-entered passageway 66 is formed with the connection opening of suction tude 41.Therefore, the outlet 66B of secondary gas-entered passageway 66 is arranged in suction tude 41.
In this case, the outlet 66B being similar to secondary gas-entered passageway 66 is arranged on the situation in suction port 36, the air quantity being fed to suction port 36 from secondary gas-entered passageway 66 is controlled rightly by the valve system of ISC unit 65, the top of combustion chamber that the air sprayed can be transported to engine 24 divides the region around 51 and firing chamber 46, and need not increase special assembly.Therefore, by the In-Cylinder Flow (tumble and swirl) of the fuel-air mixture in enhanced burning room top portion 51 and firing chamber 46, stir this fuel-air mixture, can combustion regime be improved and improve the combustion efficiency of engine 24, thus improving velocity of combustion.In addition, because ISC unit 65 is used to strengthen In-Cylinder Flow, and do not need to increase special assembly, therefore, it is possible to suppress cost to increase.
In addition, because the elongation line P being arranged on the center line of the outlet 66B of the secondary gas-entered passageway 66 in suction tude 41 is set to the below dividing the top surface 73 of 51 through the top of combustion chamber of cylinder head 34, the outlet 66B of secondary gas-entered passageway 66 can point to the inside that the firing chamber 46 of engine 24 and top of combustion chamber divide 51.Therefore, from air stream flowing in combustion chamber top portion 51 and the firing chamber 46 point-blank that the outlet 66B of secondary gas-entered passageway 66 sprays, and do not collide with the wall surface of suction port 36 and suction tude 41.Thus, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
Further, because the elongation line P being arranged on the center line of the outlet 66B of the secondary gas-entered passageway 66 in suction tude 41 is set to the top of the head part 53A of the suction valve 53 under being in full open position, the air stream sprayed from the outlet 66B of secondary gas-entered passageway 66 flows directly into the firing chamber 46 of engine 24 and top of combustion chamber divides 51 and do not stopped by suction valve 53.Therefore, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
Further, because the elongation line P being arranged on the center line of the outlet 66B of the secondary gas-entered passageway 66 in suction tude 41 is set to intersect with the end 58A of spark plug 58 in fact, from the end 58A of the empty air flow direction spark plug 58 that the outlet 66B of secondary gas-entered passageway 66 sprays, thus around end 58A, intensify the flowing of fuel-air mixture.Therefore, sufficient fuel-air mixture can be gathered at the after-stage of the compression process of engine 24 around the end 58A of spark plug 58.Therefore, combustibility can be enhanced, even and thin fuel-air mixture also can reliably be burnt.
Further, because the elongation line P being arranged on the center line of the outlet 66B of the secondary gas-entered passageway 66 in suction tude 41 is set in the worm's eye view of engine 24 through dividing the position of the center Q of 51 and firing chamber 46 away from top of combustion chamber, especially, eddy current can be divided in 51 and firing chamber 46 at top of combustion chamber by the air stream that sprays from the outlet 66B of secondary gas-entered passageway 66 and produces energetically.Therefore, the In-Cylinder Flow of fuel-air mixture can be strengthened and is intensified further, and combustion regime can be improved further.
Further, be arranged in the secondary gas-entered passageway 66 in suction tude 41, the internal diameter of outlet 66B is set to less than the internal diameter of entrance 66A.According to the air stream sprayed like this, the flow velocity of the air stream sprayed from the outlet 66B of secondary gas-entered passageway 66 can be increased.Divide the In-Cylinder Flow of the fuel-air mixture in 51 and firing chamber 46 to be intensified further at the top of combustion chamber of engine 24, and the mixing effect of fuel air mixture can be modified.
Further, the ISC passage 72 be arranged in suction tude 41 is connected by the flexible pipe 70 such as extended in engine 24 and engine intake 37 outside with the coupling bar 69 of the shell 40A being installed to throttle body 40.Therefore, do not need to form complicated flow channel in the shell 40A etc. of the throttle body 40 of engine intake 37, thus cost of production can be suppressed to increase.
It is further noted that the present invention is not limited to above-described embodiment, in the scope not deviating from purport of the present invention and appended claim, other changes many and amendment can be made or replace.
Claims (9)
1. an air intake apparatus for the engine of engine unit, described engine unit comprises: described engine; Cylinder block, described cylinder block is provided with the cylinder forming firing chamber; Cylinder head, described cylinder head is attached to one end of described cylinder block, forms the top portion of described firing chamber, and described cylinder head is provided with for combustion gas being guided the suction port entering described firing chamber; The described combustion gas produced by mixing air and fuel are fed to the described suction port of described engine by the air intake apparatus of described engine by main gas-entered passageway, it is characterized in that,
The air intake apparatus of described engine comprises air inflow controlling mechanism, described air inflow controlling mechanism comprises secondary gas-entered passageway from described main gas-entered passageway branch and for regulating the supply of the air entering described suction port, and described secondary gas-entered passageway is configured to the flow channel sectional area that its flow channel sectional area is less than described main gas-entered passageway, described secondary gas-entered passageway has entrance and exit, described entrance is arranged at described main gas-entered passageway, and described outlet is arranged at the described suction port of described engine.
2. an air intake apparatus for the engine of engine unit, described engine unit comprises: described engine; Cylinder block, described cylinder block is provided with the cylinder forming firing chamber; Cylinder head, described cylinder head is attached to one end of described cylinder block, forms the top portion of described firing chamber, and described cylinder head is provided with for combustion gas being guided the suction port entering described firing chamber; The described combustion gas produced by mixing air and fuel are fed to the described suction port of described engine by the air intake apparatus of described engine by the main gas-entered passageway of throttle body and the main gas-entered passageway of suction tude, it is characterized in that,
The air intake apparatus of described engine comprises air inflow controlling mechanism, described air inflow controlling mechanism comprises secondary gas-entered passageway from described main gas-entered passageway branch and for regulating the supply of the air entering described suction port, and described secondary gas-entered passageway is configured to the flow channel sectional area that its flow channel sectional area is less than described main gas-entered passageway, described secondary gas-entered passageway has entrance and exit, described entrance is arranged at the main gas-entered passageway of described throttle body, and described outlet is arranged at the main gas-entered passageway of described suction tude.
3. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, the described secondary gas-entered passageway of described air inflow controlling mechanism is set as the below of the top surface in the described top portion of the described firing chamber making the elongation line of the center line of described outlet through described engine.
4. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, the described secondary gas-entered passageway of described air inflow controlling mechanism is set as, when the described suction valve of the described suction port of engine described in switch is standard-sized sheet, make the elongation line of the center line of described outlet through the top of the head part of described suction valve.
5. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, spark plug is installed in the described cylinder head of described engine, described spark plug is stretched out from described firing chamber, and the described secondary gas-entered passageway of described air inflow controlling mechanism is set as the elongation line of the center line of described outlet is roughly intersected with the end of described spark plug.
6. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, the described secondary gas-entered passageway of described air inflow controlling mechanism is set as making the elongation line of the center line of described outlet in the worm's eye view of described engine through the position away from the center of the described firing chamber of described engine.
7. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, the described secondary gas-entered passageway of described air inflow controlling mechanism is set as making the opening diameter of described outlet be less than the opening diameter of described entrance.
8. the air intake apparatus of engine as claimed in claim 1 or 2, it is characterized in that, wherein, described air inflow controlling mechanism comprises: as the branched bottom of described secondary gas-entered passageway, described branched bottom is configured to be communicated with downstream side with the upstream side of the air throttle be configured in described main gas-entered passageway, and described air inflow controlling mechanism is ISC mechanism, the rotating speed of described ISC mechanism by regulating the air quantity of the described secondary gas-entered passageway of described engine when idle running to control the idle running of described engine.
9. the air intake apparatus of engine as claimed in claim 1 or 2, is characterized in that, wherein, described engine is used for pedal motorcycle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013258947A JP2015113822A (en) | 2013-12-16 | 2013-12-16 | Intake system for engine |
| JP2013-258947 | 2013-12-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104712417A true CN104712417A (en) | 2015-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410784534.8A Pending CN104712417A (en) | 2013-12-16 | 2014-12-16 | Gas inlet device of engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2015113822A (en) |
| CN (1) | CN104712417A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6963516B2 (en) * | 2018-01-26 | 2021-11-10 | 株式会社ミクニ | Throttle device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4072136A (en) * | 1974-11-13 | 1978-02-07 | Toyota Jidosha Kogyo Kabushiki Kaisha | Apparatus for supplying rich air/fuel mixture in an internal combustion engine |
| US4450803A (en) * | 1980-08-13 | 1984-05-29 | Suzuki Kogyo Kabushiki Kaisha | Internal combustion engine |
| US4763624A (en) * | 1986-06-09 | 1988-08-16 | Volvo Car B.V. | Combustion engine |
| US5564384A (en) * | 1993-11-08 | 1996-10-15 | Hitachi, Ltd. | Intake system for internal combustion engine |
| CN1705818A (en) * | 2002-10-18 | 2005-12-07 | 雅马哈发动机株式会社 | Engine |
-
2013
- 2013-12-16 JP JP2013258947A patent/JP2015113822A/en active Pending
-
2014
- 2014-12-16 CN CN201410784534.8A patent/CN104712417A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4072136A (en) * | 1974-11-13 | 1978-02-07 | Toyota Jidosha Kogyo Kabushiki Kaisha | Apparatus for supplying rich air/fuel mixture in an internal combustion engine |
| US4450803A (en) * | 1980-08-13 | 1984-05-29 | Suzuki Kogyo Kabushiki Kaisha | Internal combustion engine |
| US4763624A (en) * | 1986-06-09 | 1988-08-16 | Volvo Car B.V. | Combustion engine |
| US5564384A (en) * | 1993-11-08 | 1996-10-15 | Hitachi, Ltd. | Intake system for internal combustion engine |
| CN1705818A (en) * | 2002-10-18 | 2005-12-07 | 雅马哈发动机株式会社 | Engine |
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| Publication number | Publication date |
|---|---|
| JP2015113822A (en) | 2015-06-22 |
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Application publication date: 20150617 |