CN203476485U - Combustor structure of internal combustion engine - Google Patents

Combustor structure of internal combustion engine Download PDF

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Publication number
CN203476485U
CN203476485U CN201320588400.XU CN201320588400U CN203476485U CN 203476485 U CN203476485 U CN 203476485U CN 201320588400 U CN201320588400 U CN 201320588400U CN 203476485 U CN203476485 U CN 203476485U
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China
Prior art keywords
opening
suction port
edge
firing chamber
air inlet
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Expired - Lifetime
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CN201320588400.XU
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Chinese (zh)
Inventor
永崎岳人
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Toyota Motor Corp
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Toyota Motor Corp
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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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  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The utility model provides a combustor structure of an internal combustion engine. The combustor structure of the internal combustion engine is structurally characterized in that in an internal wall (5) of the part, located between an opening edge (21) of an air inlet (2) and an opening edge (31) of an exhaust port, of the combustor, inflow air flows the area from the opening edge (21) of the air inlet (2) to the opening edge (31) of the exhaust port, and the area is in an shape similar to a plane. By means of the structure, the energy of inlet air tumbling cannot be attenuated, and therefore the promoting effect on fuel atomization from tumbling can be ensured.

Description

The structure of the firing chamber of internal-combustion engine
Technical field
The utility model relates to the shape of the internal face of the structure of the firing chamber of internal-combustion engine, particularly firing chamber.
Background technique
In the past, in automobile etc., in the motor of installing, generally all made to roll stream from the air of suction port flowing in combustion chamber.By this, roll stream, fuel atomization is promoted.Its result, the combustion efficiency of motor is improved.For example, the technology that a kind of shape by improved inlet gas mouth improves the flow velocity that rolls stream is disclosed in patent documentation 1.
Yet, even if improved the shape of suction port, still exist from the flow velocity of the air of suction port flowing in combustion chamber and reduce or flow reduces such problem.Below, this is specifically described.
Fig. 2 (a) and Fig. 2 (b) show respectively the firing chamber of a cylinder and the shape of suction port of the motor of available technology adopting.In these figure, 11 represent firing chamber; The internal face of the cylinder-bore that 12 inside that are illustrated in cylinder block form; 13 represent the bottom surface of cylinder head; 14 represent suction port; 15 represent the edge of opening of suction port 14; 16 represent the edge of opening of relief opening.
Firing chamber 11 shown in Fig. 2 (a) has ridge 17.Being shaped as of this ridge 17, at the edge of opening 15 from suction port 14, to the region till the edge of opening 16 of relief opening, swell laterally the bottom surface 13 of cylinder head.Adopt in the situation of this structure, when INO being made to air from suction port 14 flowing in combustion chamber 11, a part of leaked-in air flows along the interior shape of above-mentioned ridge 17.Thereby, the space enlargement that leaked-in air is mobile.Its result, the flow velocity of the air of flowing in combustion chamber 11 reduces, and the degradation of energy that makes to roll stream.
Firing chamber shown in Fig. 2 (b) has curved part 18.Being shaped as of this curved part 18, at the edge of opening 15 from suction port 14, to the region till the edge of opening 16 of relief opening, the bottom surface 13 of cylinder head is crooked to the inside.Adopt in the situation of this structure, when INO being made to air from suction port 14 flowing in combustion chamber 11, the mobile obstruction that is subject to curved part 18 of a part of leaked-in air, and the flow direction of leaked-in air changes because of this obstruction.Its result, the flow of the air of flowing in combustion chamber 11 reduces, and the degradation of energy that makes to roll stream.
[patent documentation 1]: TOHKEMY 2013-11229 communique
Model utility content
In order to solve the problems of the technologies described above, the purpose of this utility model is, provides a kind of and can prevent that air inlet from rolling the structure of firing chamber of internal-combustion engine of the degradation of energy of stream.
As the technological scheme solving the problems of the technologies described above, being configured to of the firing chamber of internal-combustion engine of the present utility model, the suction port of described internal-combustion engine and relief opening have opening respectively on the internal face of described firing chamber, in the internal face of the described firing chamber between the edge of opening at described suction port and the edge of opening of described relief opening, air inlet from the edge of opening of described suction port, flow to described relief opening edge of opening the region of process be formed almost plane shape.
In the utility model, described air inlet refers to from described suction port leaked-in air, and described almost plane shape comprises, also not the shape of crooked face, shape, the shape of crooked face a little to the inside of the face of protuberance a little laterally to the inside of protuberance laterally.
The advantage of structure of firing chamber with the internal-combustion engine of the present utility model of above-mentioned structure is, can prevent that air inlet from rolling the degradation of energy of stream.That is, when air inlet flowing in combustion chamber, the flowing space of this air inlet can not expand, so the flow velocity of the air inlet of flowing in combustion chamber can not reduce.In addition, during air inlet flowing in combustion chamber, the flowing space of this air inlet can not narrow down yet, so the flow of the air inlet of flowing in combustion chamber can not reduce.Therefore the energy that, stream is rolled in air inlet can not decayed.Its result, can guarantee to roll the facilitation effect of stream to fuel atomization.
In addition, in the structure of the firing chamber of above-mentioned internal-combustion engine of the present utility model, each cylinder of described internal-combustion engine is provided with two described suction ports and two described relief openings, the internal face of described firing chamber comprises the internal face of cylinder-bore and the bottom surface of cylinder head, in the bottom surface of described cylinder head, a part by the boundary line between the internal face of described cylinder-bore and the bottom surface of described cylinder head, the edge of opening of the described suction port at the opposite slightly to the right or left of a part for this boundary line, and the region that the edge of opening of the described relief opening at the opposite slightly to the right or left of a part for this boundary line surrounds is formed almost plane shape.
The advantage of above-mentioned structure is, for each suction port, can fully guarantee from flow velocity and the flow of the air inlet of suction port flowing in combustion chamber.The energy that rolls stream of the air inlet therefore, flowing into from each suction port can not decayed.Its result, can guarantee to roll the facilitation effect of stream to fuel atomization.
Accompanying drawing explanation
Fig. 1 means the firing chamber of a cylinder of motor and the figure of the shape of suction port of mode of execution of the present utility model.
Fig. 2 (a) means the firing chamber of a cylinder of motor of available technology adopting and the figure of an example of the shape of suction port.
Fig. 2 (b) means the firing chamber of a cylinder of motor of available technology adopting and the figure of another example of the shape of suction port.
Embodiment
Below, with reference to accompanying drawing, embodiment of the present utility model is described.
Fig. 1 represents the firing chamber 1 of a cylinder of motor (internal-combustion engine) and the shape of the suction port 2 of a side of present embodiment.In this Fig. 1, suction port and two relief openings of opposite side have been omitted.
As shown in Figure 1, the space that firing chamber 1 is the internal face 4 of cylinder-bore that formed by the inside in cylinder block, the end face of the bottom surface 5 of cylinder head and not shown piston surrounds.The bottom surface 5 of cylinder head forms the indoor top surface of firing chamber 1.The bottom surface 5 of this cylinder head has air inlet skew back face 51 and exhaust side inclined-plane 52.Air inlet skew back face 51 is from the intermediate portion of the bottom surface 5 of cylinder head to lopsidedness.Exhaust side inclined-plane 52 tilts to opposite side from the intermediate portion of the bottom surface 5 of cylinder head.Therefore, firing chamber 1 is ridge-roof type.
On air inlet skew back face 51, be provided with the suction port 2 that a side is only shown in two suction port 2(Fig. 1) opening.In Fig. 1 21 represents the edge of opening of suction port 2.
On exhaust side inclined-plane 52, be provided with the opening of two relief openings (having omitted each relief opening in Fig. 1).In Fig. 1 31 represents the edge of opening of relief opening.
On each suction port 2, dispose not shown suction valve.On each relief opening, dispose not shown outlet valve.
Suction valve moves to the inner side of firing chamber 1 in the intake stroke of motor.Thereby suction port 2 is communicated with firing chamber 1.Now, the air inlet that flows into suction port 2 after the valve face of suction valve flows, flowing in combustion chamber 1.
Outlet valve moves to the inner side of firing chamber 1 in the exhaust stroke of motor.Thereby relief opening is communicated with firing chamber 1.
In addition, on suction port 2, by intake manifold, be connected with suction tude (not shown); On relief opening, by gas exhaust manifold, be connected with outlet pipe (not shown).
In the gas-entered passageway being connected with suction port 2, the Fuelinjection nozzle (not shown) of 1 burner oil to firing chamber is installed.In addition, spark plug (not shown) is installed in cylinder head.This spark plug is installed in the intermediate portion of the bottom surface 5 of cylinder head.
Below, the feature of present embodiment is described.
Present embodiment is characterised in that, internal face in the 5(Ji firing chamber, bottom surface 1 of the cylinder head between the edge of opening 21 at suction port 2 and the edge of opening 31 of relief opening), in, the region that air inlet flow to 31 processes of edge of opening of relief opening from the edge of opening 21 of suction port 2 is formed almost plane shape.That is, make the indoor top surface of the 5(firing chamber, bottom surface 1 of cylinder head) be roughly parallel to from the streamline of the air inlet of suction port 2 flowing in combustion chambers 1.Below, this is elaborated.
In the present embodiment, the region that is formed almost plane shape refers to, in the bottom surface 5 of cylinder head, the region that in the edge of opening 21 of the suction port 2 of front side, Fig. 1, a part (intermediate portion of front side) of the boundary line X between the edge of opening 31 of the relief opening of front side and the internal face 4 of cylinder-bore and the bottom surface 5 of cylinder head is surrounded in Fig. 1; And the region that in the edge of opening, Fig. 1 of the suction port of unshowned rear side, the edge of opening 31 of relief opening of rear side and a part (intermediate portion of unshowned rear side) of the boundary line X between the internal face 4 of cylinder-bore and the bottom surface 5 of cylinder head are surrounded in Fig. 1.
More specifically, in the present embodiment, the delta-shaped region that in Fig. 1,5 front side surrounds with dotted line in bottom surface is formed almost plane shape.This delta-shaped region is best for protuberance is not crooked to the inside yet laterally, but also can swell a little laterally, or crooked a little to the inside.That is this delta-shaped region that, is formed the bottom surface 5 of almost plane shape is roughly parallel to the streamline of the air inlet of the valve face flowing in combustion chamber 1 from suction port 2 along suction valve.
Three limits (A, B, C) of above-mentioned delta-shaped region in Fig. 1 surround.The suitable distance of (tangent line of Fig. 1 mid point I) almost parallel interval of a tangent line on the circular arc of the edge of opening 21 of limit A and suction port 2.The suitable distance of (tangent line of Fig. 1 mid point II) almost parallel interval of a tangent line on the circular arc of the edge of opening 31 of limit B and relief opening.The intersection point of limit C and limit A (the some III in Fig. 1) be positioned at boundary line X near, the intersection point of limit C and limit B (the some IV in Fig. 1) is near boundary line X.
In addition, the rear side being covered by suction port 2 in Fig. 1, is also formed with the delta-shaped region of the almost plane shape that the delta-shaped region that surrounds with above-mentioned three limits (A, B, C) is identical symmetrically.
As described above, if adopted from the edge of opening of suction port to the region of the edge of opening of relief opening, the structure of the prior art that swell laterally cylinder head bottom surface,, when INO being made to air inlet from suction port flowing in combustion chamber, a part for air inlet can flow along the interior shape of ridge.Thereby cause the flowing space of air inlet to expand.Its result, the flow velocity of the air inlet of flowing in combustion chamber reduces, the degradation of energy of rolling stream.
In addition, if the region till adopting from the edge of opening of suction port to the edge of opening of relief opening, cylinder head bottom surface is the structure of crooked prior art to the inside, while INO being made to air inlet from suction port flowing in combustion chamber, the mobile meeting of a part for air inlet is subject to the obstruction of curved part, and the flow direction of air inlet can change because of the obstruction of curved part.Its result, the flow of the air inlet of flowing in combustion chamber reduces, the degradation of energy of rolling stream.
To this, the structure of the firing chamber 1 of the internal-combustion engine of employing present embodiment, due in the internal face of combustion chamber between the edge of opening 21 at suction port and the edge of opening 31 of relief opening, air inlet flow to the edge of opening 31 of described relief opening and the region (in this case above-mentioned delta-shaped region) of process is formed almost plane shape from the edge of opening 21 of suction port, so, the air inlet of the valve face flowing in combustion chamber 1 from suction port 2 along suction valve can be flowed with the internal face of the firing chamber of almost plane shape with paralleling, thereby flow velocity can not reduce, flow can not reduce.Thereby, can obtain the higher stream that rolls and compare.That is, rolling stream energy and can not decaying of air inlet, can guarantee to roll the facilitation effect of stream to fuel atomization.Its result, can improve the rate of fuel consumption rate of motor.
In addition, inventor of the present utility model is in order to confirm effect of the present utility model, uses C F D(computation fluid dynamics) carried out analog computation.The result of this analog computation shows, adopts in the situation of structure of the present utility model, roll the energy Ratios prior art of stream structure (structure shown in Fig. 2 (a), Fig. 2 (b)) increase 2.5%.
In addition, the utility model is not limited to above-mentioned mode of execution, can carry out suitable change.
For example, in the above-described embodiment, the region of described almost plane shape is configured to the delta-shaped region being surrounded by three limits, but is not limited to this, can be also the region of other shape of being surrounded by three above straight lines or curve.
In addition, in the above-described embodiment, the utility model is applied to the situation that each cylinder is provided with the motor of two suction ports 2 and is illustrated.But the utility model is not limited to this, also can be applied to the motor that a cylinder is provided with a suction port.
In addition, the utility model, except can being applied to traditional automobile (the only vehicle as power source with motor), can also be applied to hybrid vehicle (using motor and electric motor as the vehicle of power source).

Claims (2)

1. a structure for the firing chamber of internal-combustion engine, the suction port of described internal-combustion engine and relief opening have opening respectively on the internal face of described firing chamber, it is characterized in that:
In the internal face of the described firing chamber between the edge of opening at described suction port and the edge of opening of described relief opening, air inlet from the edge of opening of described suction port, flow to described relief opening edge of opening the region of process be formed almost plane shape.
2. the structure of the firing chamber of internal-combustion engine as claimed in claim 1, is characterized in that:
Each cylinder of described internal-combustion engine is provided with two described suction ports and two described relief openings,
The internal face of described firing chamber comprises the internal face of cylinder-bore and the bottom surface of cylinder head,
In the bottom surface of described cylinder head, the region being surrounded by the edge of opening of the described relief opening at the opposite slightly to the right or left of the part for boundary line between the internal face of described cylinder-bore and the bottom surface of described cylinder head, the edge of opening of the described suction port at the opposite slightly to the right or left of a part for this boundary line and a part for this boundary line is formed almost plane shape.
CN201320588400.XU 2013-09-23 2013-09-23 Combustor structure of internal combustion engine Expired - Lifetime CN203476485U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320588400.XU CN203476485U (en) 2013-09-23 2013-09-23 Combustor structure of internal combustion engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320588400.XU CN203476485U (en) 2013-09-23 2013-09-23 Combustor structure of internal combustion engine

Publications (1)

Publication Number Publication Date
CN203476485U true CN203476485U (en) 2014-03-12

Family

ID=50224829

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320588400.XU Expired - Lifetime CN203476485U (en) 2013-09-23 2013-09-23 Combustor structure of internal combustion engine

Country Status (1)

Country Link
CN (1) CN203476485U (en)

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