CN204691946U - A kind of inlet structure of internal-combustion engine - Google Patents

A kind of inlet structure of internal-combustion engine Download PDF

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Publication number
CN204691946U
CN204691946U CN201520111802.XU CN201520111802U CN204691946U CN 204691946 U CN204691946 U CN 204691946U CN 201520111802 U CN201520111802 U CN 201520111802U CN 204691946 U CN204691946 U CN 204691946U
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China
Prior art keywords
jetburner
internal
intake duct
combustion engine
wall
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CN201520111802.XU
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Chinese (zh)
Inventor
井上欣也
土桥优贵
城田贵之
佐藤公彦
田中大
口田征人
东博文
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

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  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Abstract

The utility model provides a kind of inlet structure of internal-combustion engine, and it promotes the vaporization of fuel while suppressing intake temperature to rise, thus improves fuel economy.Intake duct (30), a part for its wall is made up of the heat preservation structural component (44) be arranged on cylinder cap (16).Heat preservation structural component (44), has and to be positioned at the upstream portion (46) of upstream side and to be positioned at the downstream part (48) in downstream side compared with the jetburner (4202) of the air inlet of flowing at intake duct (30) compared with jetburner (4202).The internal surface (4602) of upstream portion (46) forms the Zone Full being positioned at the wall (3002) of the intake duct (30) of upstream side compared with jetburner (4202).The inner face (4802) of downstream part (48) forms the position of the wall (3004) of the wall being arranged in the intake duct (30) in downstream side compared with jetburner (4202) side relative to jetburner (4202).The position being arranged in the wall (3006) of wall jetburner (4202) side of the intake duct (30) in downstream side compared with jetburner (4202) is made up of cylinder cap (16).

Description

A kind of inlet structure of internal-combustion engine
Technical field
The utility model relates to a kind of inlet structure of internal-combustion engine, relates more specifically to the inlet structure of gas-duct jetting formula internal-combustion engine.
Background technique
In recent years, from the viewpoint improving fuel economy, require the internal-combustion engine of the high compression ratio improving the thermal efficiency.
Compared with low compression ratio internal combustion engine, because after the internal-combustion engine compression of high compression ratio, the temperature of mixed gas uprises, easy pinking, ignition timing needs to postpone (delayed).
Its result, owing to reducing the raising effect of fuel economy, needs the rising suppressing intake temperature and even mixed gas temperature.
But air inlet is by the gas-entered passageway of intake manifold and be arranged at the intake duct of cylinder cap and be inhaled into firing chamber.
The heat heating that intake manifold and cylinder cap are transmitted by firing chamber, therefore air inlet cannot be avoided being heated from the gas-entered passageway of intake manifold and the wall of cylinder cap intake duct and causing temperature to rise.
Therefore, the resin material proposed by having heat insulating ability forms intake manifold, the intake manifold insertion part be formed from a resin is inserted into the suction tude mounting structure (with reference to patent documentation 1) of air flue.
In the structure shown here, the insertion part be formed from a resin is inserted into air flue, decreases the area by the wall component part of cylinder cap in the wall of intake duct, reaches the object suppressing intake temperature to rise.
[patent documentation 1] Japanese Patent Laid-Open 2007-285171 publication
Model utility technical problem to be solved
But, when by oil sprayer to the gas-duct jetting formula internal-combustion engine of burner oil in intake duct, the fuel sprayed by oil sprayer forms the cylinder cap wall of intake duct wall and intake valve by contact and is heated, and promotes vaporization.
Once the rotating speed of internal-combustion engine rises, air-breathing speed accelerates, then the fuel sprayed by the jetburner of oil sprayer is arranged in the intake duct wall of the wall jetburner side of the intake duct in jetburner downstream side by contact and is heated, and promotes vaporization.
In above-mentioned prior art situation, the insertion part be formed from a resin extends to the downstream side compared with jetburner, therefore decreases the area forming and be arranged in the cylinder cover wall face portion of the intake duct wall of the wall jetburner side of the intake duct in jetburner downstream side.
For this reason, the wall portions that the fuel deposition sprayed by jetburner is formed in the insertion part be formed from a resin, inhibits the vaporization of fuel, therefore reduces combustion efficiency, is unfavorable for the raising of fuel economy.
The utility model completes in view of the foregoing, and its object is to provides a kind of vaporization promoting fuel while being risen by suppression intake temperature, to reach the inlet structure being conducive to the internal-combustion engine improving fuel economy.
Model utility content
To achieve these goals, the utility model, it is a kind of intake duct insulating structure of internal-combustion engine, it is characterized in that possessing: oil sprayer, is configured on gas-entered passageway, for supplying fuel; Heat preservation structural component, is configured at the inside of intake duct, and forms gas-entered passageway with described intake duct; Wherein, described heat preservation structural component has groove on the wall being configured with described oil sprayer side.
Preferably, the jetburner of described oil sprayer is configured at the inside of described intake duct, described heat preservation structural component by formed from described jetburner described gas-entered passageway upstream side wall portion upstream side wall portion and form from the downstream side wall portion that described jetburner forms described gas-entered passageway downstream side, described groove is arranged at described downstream side wall portion.
Preferably, described downstream side wall portion extends to and the described injected fuel spray attachment area of described jetburner relative to the described wall of side.
Preferably, the described upstream side wall portion of described heat preservation structural component is formed as substantially cylindric, have the outer surface of the internal surface forming described intake duct wall and the cylinder cap recess being entrenched in described internal-combustion engine, described outer surface is formed by the plane of inclination more becoming less close to described downstream side wall portion outside dimension.
Preferably, described heat preservation structural component is made up of hollow unit and the thermal insulating material that is inserted into described hollow unit inside.
Preferably, described upstream side wall portion and described downstream side wall portion are splits.
Model utility effect
According to first aspect of the present utility model, in the High Rotation Speed region of motor, the wall of the fuel deposition of being sprayed by oil sprayer is made up of cylinder cap, therefore the combustion efficiency improving fuel is conducive to, in addition, the air flue wall at the position of the wall that the most of fuel sprayed by jetburner does not adhere to is made up of heat preservation structural component, is therefore conducive to suppressing intake temperature to rise.Therefore the fuel economy improving motor is conducive to.
According to second aspect of the present utility model, in the High Rotation Speed region of motor, the intake duct wall of most of fuel deposition of being sprayed by jetburner is made up of cylinder cap, therefore effectively the fuel of the wall being attached to intake duct is vaporized by the wall of the cylinder cap of high temperature, be conducive to the combustion efficiency improving fuel.In addition, in the High Rotation Speed region of motor, the air flue wall at the position of the wall that the most of fuel sprayed by jetburner does not adhere to is made up of heat preservation structural component, therefore inhibits the heat of cylinder cap to air inlet transmission, is conducive to suppressing the temperature of air inlet to rise.Therefore the fuel economy improving motor is conducive to.
According to the third aspect of the present utility model, in the low speed rotation region of motor, the intake duct wall of the major part attachment of the fuel sprayed by jetburner is made up of cylinder cap, therefore effectively the fuel of the wall being attached to intake duct is vaporized by the wall of the cylinder cap of high temperature, be conducive to the combustion efficiency improving fuel.In addition, in the low speed rotation region of motor, the air flue wall at the position of the wall that the most of fuel sprayed by jetburner does not adhere to is made up of heat preservation structural component, therefore inhibits the heat of cylinder cap to air inlet transmission, is conducive to suppressing the temperature of air inlet to rise.Therefore the fuel economy improving motor is conducive to.
According to fourth aspect of the present utility model, chimeric when having a upstream portion on the recess of intake duct, be conducive to being fitted together to upstream portion without loosening.
According to the 5th aspect of the present utility model, by selecting the kind being inserted into the thermal insulating material of hollow unit inside, or set number and the thickness of sheet thermal insulating material, the temperature distribution being conducive to corresponding cylinder cap guarantees the thermal insulation property of best intake duct.
According to the 6th aspect of the present utility model, by changing the kind of the thermal insulating material being used for upstream portion and downstream part, thus the thermal insulation property of upstream portion and downstream part can be changed, the temperature distribution being conducive to corresponding cylinder cap guarantees the thermal insulation property of best intake duct.
Accompanying drawing explanation
Fig. 1 is the sectional view of the inlet structure of the internal-combustion engine that present embodiment is shown;
Fig. 2 (A) is the AA line sectional view of Fig. 1, and Fig. 2 (B) is the BB line sectional view of Fig. 1, and Fig. 2 (C) is the CC line sectional view of Fig. 1;
Fig. 3 is the oblique drawing of the formation that heat preservation structural component is shown;
Fig. 4 is the sectional view of the formation that heat preservation structural component is shown;
Symbol description
10 motors (internal-combustion engine)
16 cylinder caps
30 intake ducts
3002 walls
3004 walls
3006 walls
3008 walls
42 oil sprayers
4202 jetburners
44 heat preservation structural components
4402 grooves
46 upstream portion (upstream side wall portion)
4602 internal surfaces
4604 outer surfaces
48 downstream parts (downstream side wall portion)
50 thermal insulating materials
Embodiment
Hereinafter, with reference to the accompanying drawings of mode of execution of the present utility model.
First, the entirety formation of combustion motor is described.
As shown in Figure 1, internal-combustion engine (hereinafter referred to as motor) 10 comprise be formed with cylinder 12 cylinder body 14, be arranged on the cylinder cap 16 on cylinder body 14 top and be disposed in the piston 18 of cylinder 12.
Suction tude 20 (intake manifold) and outlet pipe 22 (gas exhaust manifold) is connected with in the both sides of cylinder cap 16.
Firing chamber 24 by below the internal surface of cylinder 12 and cylinder cap 16 and the end face of piston 18 form, in cylinder cap 16, be provided with the spark plug 26 being positioned at firing chamber 24.
Piston 18 is connected with not shown bent axle by connecting rod 28, and in figure, symbol 1802,1804 represents pressure ring, and symbol 1806 represents oil ring.
The intake duct 30 supplying air inlet to firing chamber 24 and the air outlet flue 32 of discharging exhaust in firing chamber 24 is provided with in cylinder cap 16.
In intake duct 30, be connected with the gas-entered passageway 2002 of suction tude 20, in air outlet flue 32, be connected with the exhaust passage 2202 of outlet pipe 22.
In addition, be provided with intake valve 34 in intake duct 30, be provided with exhaust valve 36 in air outlet flue 32, these intake valves 34 and exhaust valve 36 are pushed to closing direction by valve spring 38,40.Intake valve 34 and exhaust valve 36 are driven by not shown intake and exhaust cam, switch intake duct 30 and air outlet flue 32.
In the present embodiment, motor 10 is by the gas-duct jetting formula motor of oil sprayer 42 to burner oil in intake duct 30.
Oil sprayer 42 sprays the fuel supplied by not shown pump, and it comprises towards the fuel nozzle 4204 of jetburner 4202 and is arranged on fuel nozzle 4204 and by the not shown needle-valve of actuator switch jetburner 4202 in intake duct 30.
In gas-duct jetting formula motor, in intake duct 30, mixing sucks air and fuel and becomes mixed gas, be supplied to firing chamber 24, wherein suck air and suck in intake duct 30 by the gas-entered passageway 2002 of suction tude 20, fuel is sprayed by the jetburner 4202 of oil sprayer 42.
And, by the rotation of bent axle, through intake cam and exhaust cam switch intake valve 34 and exhaust valve 36, perform aspirating stroke, compression stroke, expansion stroke and exhaust stroke, mainly in exhaust and aspirating stroke, injected fuel in intake duct 30 by jetburner 4202.
As shown in Figure 1, a part for its wall of intake duct 30 is made up of the heat preservation structural component 44 being arranged on cylinder cap 16, and heat preservation structural component 44 has groove 4402 on the wall being configured with oil sprayer 42 side.
As shown in Fig. 2 (A), intake duct 30 is in the elongated shape with height H and width W, wherein height H is the height between the wall of jetburner 4202 side and the wall of side relative to jetburner 4202, and width W is vertical with this height H and the size width larger than height H.
In Fig. 2 (A) ~ Fig. 2 (C), symbol C1 represents the center line by height center, symbol C2 represents the center line by widthwise central, intake duct 30 is the shape with center line C1 line symmetry, or with the shape of center line C2 line symmetry, jetburner 4202 is positioned on center line C2.
Heat preservation structural component 44 has: upstream portion 46, and it is located at the upstream side of the jetburner 4202 of the air inlet that intake duct 30 flows; Downstream part 48, it is positioned at the downstream side of jetburner 4202.
As shown in Figure 1, Figure 2 shown in (A), Fig. 3, upstream portion 46, in tubular, has the internal surface 4602 of the wall forming intake duct 30 and is positioned at its relative position and is entrenched in the outer surface 4604 of the recess 1602 of cylinder cap 16.
Outer surface 4604 is formed by the plane of inclination more becoming less close to downstream part 48 outside dimension.
The internal surface 4602 of upstream portion 46 is extended to form by the intake duct 30 with uniform cross-section, forms the Zone Full of the wall 3002 of the intake duct 30 being positioned at upstream side compared with jetburner 4202.
In addition, downstream part 48 has the inner face 4802 of the wall forming intake duct 30 and is positioned at its relative position and is entrenched in the outside 4804 of the recess 1602 of cylinder cap 16.
The position of the wall that the inner face 4802 of downstream part 48 forms the intake duct 30 being arranged in downstream side compared with jetburner 4202 and jetburner 4202 wall 3004 of side relatively, the position of the wall 3006 extended along the bearing of trend of intake duct 30 in wall jetburner 4202 side of the intake duct 30 being arranged in downstream side compared with jetburner 4202 is made up of cylinder cap 16.
Therefore, in the present embodiment, groove 4402, in the region surrounded by the downstream of upstream portion 46 and the top of downstream part 48, is formed as open shape towards side, firing chamber 24.
The width W direction of downstream part 48 inner face be centrally located on center line C2, in the present embodiment, as shown in Figure 1, Figure 2 shown in (B), Fig. 2 (C), Fig. 3, the width W 1 of downstream part 48 inner face and the height H 1 of downstream part 48 inner face are formed as becoming less the closer to side, firing chamber 24, in the bearing of trend of intake duct 30 the unit length inner face area of inner face more arrive air inlet flowing downstream side become less.
Like this, make the width W 1 of the inner face 4802 of downstream part 48 and height H 1 become less the closer to side, firing chamber 24, the downstream side making the unit length inner face area of inner face 4802 in the bearing of trend of intake duct 30 more arrive air inlet flowing becomes less.Accordingly, the area configuring heat preservation structural component 44 near firing chamber 24 becomes minimum, is therefore conducive to the fast vaporizing of fuel.In addition, according to the spray shapes configuration heat preservation structural component 44 of the fuel sprayed from jetburner 4202, the vaporization of fuel while being therefore conducive to being incubated suction tude 20, is promoted.
According to the present embodiment, in the High Rotation Speed region of motor 10, because the intake velocity flowed at intake duct 30 accelerates, the position of the wall 3006 that most of fuel deposition of spraying from jetburner 4202 extends at the bearing of trend along intake duct 30 of jetburner 4202 side.
And, by being heated from wall 3006, facilitate the vaporization in intake duct 30, suck firing chamber 24 as the mixed gas mixed with air inlet, the fuel be not attached on the wall 3006 of intake duct 30 mixes with air inlet and is inhaled into firing chamber 24 in intake duct 30.
In the present embodiment, wall jetburner 4202 side being arranged in the intake duct 30 in downstream side compared with jetburner 4202 is made up of along the position of the wall 3006 that the bearing of trend of intake duct 30 extends cylinder cap 16.
Therefore, in the High Rotation Speed region of motor 10, effectively the fuel of the wall 3006 being attached to intake duct 30 is vaporized by the wall 3006 of the cylinder cap 16 of high temperature, be conducive to the combustion efficiency improving fuel.
In addition, in the High Rotation Speed region of motor 10, namely the position of the wall that the most of fuel sprayed by jetburner 4202 does not adhere to is arranged in the Zone Full of the wall 3002 of the intake duct 30 of upstream side and is positioned at the position of wall and jetburner 4202 wall 3004 of side relatively of intake duct 30 in downstream side compared with jetburner 4202 compared with jetburner 4202, be made up of the heat preservation structural component 44 comprising upstream portion 46 and downstream part 48, therefore inhibit the heat of cylinder cap 16 to air inlet transmission, be conducive to suppressing the temperature of air inlet to rise, be conducive to the fuel economy improving motor 10.
Therefore, can combustion efficiency be improved while suppression intake temperature rises, be conducive to the fuel economy improving motor 10.
In addition, in the low speed rotation region of motor 10, the fuel sprayed by jetburner 4202, on the wall 3008 that its major part is attached to the intake duct 30 of side relative to jetburner 4202 and intake valve 34.
And, by the vaporization promoted in intake duct 30 of being heated from wall 3008 and intake valve 34, be inhaled into firing chamber 24 as the mixed gas mixed with air inlet, be not attached to the fuel on the wall 3008 of intake duct 30, mix with air inlet in intake duct 30, be inhaled into firing chamber 24.
In the present embodiment, in the position of the wall 3004 of side relative to jetburner 4202, the scope of the wall 3008 that deposited fuel is sprayed is made up of cylinder cap 16.
And, before downstream part 48 extends to the scope of wall 3008 from the position of the wall 3004 relative with jetburner 4202.
Therefore, in the low speed rotation region of motor 10, effectively the fuel of the wall 3008 being attached to intake duct 30 is vaporized, be conducive to the combustion efficiency improving fuel.
In addition, before downstream part 48 extends to the scope of wall 3008 from the position of the wall 3004 relative with jetburner 4202, therefore inhibit the transmission of heat to air inlet of cylinder cap 16, be more conducive to suppressing the temperature of air inlet to rise.
Therefore, in the low speed rotation region of motor 10, due to more can combustion efficiency be improved while suppressing intake temperature to rise better, therefore advantageously in the fuel economy improving motor 10.
In addition, because the outer surface 4604 of upstream portion 46 is formed by the plane of inclination becoming less the closer to downstream part 48 outside dimension, therefore chimeric when having a upstream portion 46 on the recess 1602 of cylinder cap 16, be conducive to being fitted together to upstream portion 46 without loosening.
In addition, when upstream portion 46 and downstream part 48 split are formed, by changing the kind of the thermal insulating material being used for upstream portion 46 and downstream part 48, thermal insulation property can be changed.
Such as, cylinder cap 16 part being configured with upstream portion 46 configures cooling water passage (high temperature), be configured with cylinder cap 16 part of downstream part 48 lower than its temperature time, for making the thermal insulation property of upstream portion 46 higher than downstream part 48, the thermal insulating material forming heat preservation structural component 44 can be selected, or the density of thermal insulating material can be set.
Therefore, be conducive to guaranteeing best thermal insulation property by the temperature distribution of corresponding cylinder cap 16.
In addition, as shown in Figure 4, upstream portion 46 and downstream part 48 also can be made up of hollow unit and the thermal insulating material 50 being inserted into hollow unit inside respectively.
If use hollow unit like this, then as the thermal insulating material 50 being inserted into hollow unit, sheet or powder, liquid etc. can be used to form the material in wall without abundant characteristic, when according to required thermal insulation property selection sheet thermal insulating material 50, number and the thickness of thermal insulating material 50 can be set.
Therefore, be conducive to guaranteeing best thermal insulation property by the temperature distribution of corresponding cylinder cap 16.
In addition, form the material of hollow unit, the well-known various material in the past such as synthetic resin material or metallic material can be used.
In addition, the hollow or solid synthetic resin material that heat preservation structural component 44 integrally can be made up of upstream portion 46 and downstream part 48 is formed, and also can be made up of hollow metallic material.
But, as present embodiment, if the upstream portion 46 of heat preservation structural component 44 and downstream part 48 are made up of the thermal insulating material 50 of hollow unit and insertion hollow unit inside respectively, then advantageously in guaranteeing best thermal insulation property.
In addition, multiple intake duct 30 is being had from the ostial branches of suction tude 20 side, when each intake duct 30 is provided with oil sprayer 42, because upstream portion 46 and downstream part 48 are by suitable branch, therefore the relative position relation of downstream part 48 that is branched with these of each oil sprayer 42 is identical with mode of execution.

Claims (8)

1. an inlet structure for internal-combustion engine, is characterized in that, possesses:
Oil sprayer, is configured on gas-entered passageway, for supplying fuel;
Heat preservation structural component, is configured at the inside of intake duct, and forms gas-entered passageway with described intake duct;
Wherein, described heat preservation structural component has groove on the wall being configured with described oil sprayer side.
2. the inlet structure of internal-combustion engine according to claim 1, is characterized in that,
The jetburner of described oil sprayer is configured at the inside of described intake duct,
Described heat preservation structural component by formed from described jetburner described gas-entered passageway upstream side wall portion upstream side wall portion and form from the downstream side wall portion that described jetburner forms described gas-entered passageway downstream side,
Described groove is arranged at described downstream side wall portion.
3. the inlet structure of internal-combustion engine according to claim 2, is characterized in that, the height that described groove type becomes the inner face of described downstream side wall portion becomes less the closer to side, firing chamber.
4. the inlet structure of internal-combustion engine according to claim 2, is characterized in that, the width that described groove type becomes the inner face of described downstream side wall portion becomes less the closer to side, firing chamber.
5. the inlet structure of the internal-combustion engine according to any one in claim 2 ~ 4, is characterized in that,
Described downstream side wall portion extends to and the described injected fuel spray attachment area of described jetburner relative to the described wall of side.
6. the inlet structure of the internal-combustion engine according to any one in claim 2 ~ 4, is characterized in that,
The described upstream side wall portion of described heat preservation structural component is formed as substantially cylindric, has the outer surface of the internal surface forming described intake duct wall and the cylinder cap recess being entrenched in described internal-combustion engine,
Described outer surface is formed by the plane of inclination more becoming less close to described downstream side wall portion outside dimension.
7. the inlet structure of the internal-combustion engine according to any one in Claims 1 to 4, is characterized in that,
Described heat preservation structural component is made up of hollow unit and the thermal insulating material that is inserted into described hollow unit inside.
8. the inlet structure of the internal-combustion engine according to any one in claim 2 ~ 4, is characterized in that,
Described upstream side wall portion and described downstream side wall portion are split type.
CN201520111802.XU 2014-03-26 2015-02-15 A kind of inlet structure of internal-combustion engine Active CN204691946U (en)

Applications Claiming Priority (2)

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JP2014063994A JP6347130B2 (en) 2014-03-26 2014-03-26 Intake port structure of internal combustion engine
JP2014-063994 2014-03-26

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Publication number Priority date Publication date Assignee Title
JP6676950B2 (en) * 2015-12-15 2020-04-08 三菱自動車工業株式会社 Insulation structure of intake port
FR3073257B1 (en) * 2017-11-08 2021-02-19 Renault Sas AIR INTAKE DEVICE FOR THERMAL ENGINE

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Publication number Priority date Publication date Assignee Title
JPH0693933A (en) * 1992-09-08 1994-04-05 Tokai Rubber Ind Ltd Pre-heater of fuel injection part in internal combustion engine
JP4306660B2 (en) * 2005-08-25 2009-08-05 トヨタ自動車株式会社 Intake port structure of internal combustion engine
JP2009236110A (en) * 2008-03-05 2009-10-15 Honda Motor Co Ltd Intake structure and exhaust structure for internal combustion engine
JP2010112250A (en) * 2008-11-06 2010-05-20 Toyota Motor Corp Manufacturing method of port of cylinder head

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Address after: No. 21, No. 3, Dingmu, No. 1, Toshiba, Tokyo, Japan

Patentee after: Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Address before: Japan Tokyo port, 33 No. 8 Chicago

Patentee before: Mitsubishi Jidosha Kogyo Kabushiki Kaisha