CN101260844A - Petrol engine intake duct - Google Patents
Petrol engine intake duct Download PDFInfo
- Publication number
- CN101260844A CN101260844A CNA2008100937502A CN200810093750A CN101260844A CN 101260844 A CN101260844 A CN 101260844A CN A2008100937502 A CNA2008100937502 A CN A2008100937502A CN 200810093750 A CN200810093750 A CN 200810093750A CN 101260844 A CN101260844 A CN 101260844A
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- Prior art keywords
- intake duct
- center line
- petrol engine
- air inlet
- valve
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- 238000002347 injection Methods 0.000 abstract description 8
- 239000007924 injection Substances 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention relates to a novel inlet channel of a gasoline engine, and the flat inlet channel is extended to a valve in the oblique direction. Because of the inlet channel has a flat shape, under the circumstance that flow coefficient is larger, airflow receives smaller flow resistance in the inlet channel. The shape of the inlet channel provided reduces the flow resistance, and the flow coefficient of the inlet channel can meet the requirement of an in-cylinder direct-injection engine.
Description
Technical field
The present invention relates to a kind of intake duct of new type gasoline engine, be specially adapted to the motor of in-cylinder direct injection homogeneous combustion.
Background technique
In-cylinder direct injection has become one of trend of petrol engine development.The in-cylinder direct injection petrol engine is pressed the formation of mixed gas in cylinder, is divided into homogeneous combustion and stratified mixture combustion.Homogeneous combustion requires to roll the stream ratio through the gas generation height that air flue enters in the cylinder, the mixed gas of favourable formation homogeneous, and intake duct reduces restriction loss as far as possible simultaneously, improves flow coefficient, improves air inflow.Present most air flue design all is the air flue that is fit to the petrol engine of manifold injection, only the upper airway flow flow coefficient is proposed high requirement, and purpose is in order to reach big air inflow; And to form in the cylinder roll stream lower than requiring.So regular price gasoline machine intake duct does not all reach the in-cylinder direct injection petrol engine rolls the stream ratio to height requirement.
Summary of the invention
The purpose of this invention is to provide a kind of petrol engine air inlet, guarantee to reduce forming height under the situation of restriction loss and roll the stream ratio.
For achieving the above object, the technical solution used in the present invention is: a kind of petrol engine air inlet is characterized in that: intake duct is a flat and with the oblique valve place that extends to.
In technique scheme, the center line of intake duct is a flat, the path that is meant intake duct keeps straight basically, and it is straight to require it to possess on the mathematical meaning, the valve that forms between the conical surface of cooperation valve stem and the cylinder cap is to the guiding of air-flow, air-flow through air flue to the valve place since this moment the cross section diminish, air-flow is stronger stream, the mixed gas of favourable formation homogeneous of rolling of formation after entering cylinder under the situation of extruding; The oblique valve place that extends to of described intake duct is meant that an angle is arranged between intake duct and the valve stem, to guarantee and the trend that enters air-flow in the cylinder after valve cooperates.
Because intake duct is a flat, under the big more situation of flow coefficient, air-flow is subjected to flow resistance more little in air flue, and the shape of air flue provided by the invention has reduced flow resistance, and this upper airway flow flow coefficient satisfies the demand of in-cylinder direct fuel-injection engine.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the side view of air flue core;
Fig. 3 is that A among the figure is to view;
Fig. 4 is the schematic representation of high-lift in-cylinder tumble flow;
Fig. 5 is the schematic representation of little lift in-cylinder tumble flow.
Embodiment
As shown in Figure 1, intake duct 10 is for flat and with the oblique valve place that extends on the gasoline engine cylinder head 20, and valve 30 is arranged in the valve guide bushing 40 and moves, and the conical surface 31 of valve 30 lower ends cooperates with air valve seat ring 50.The aperture of the air inlet section of described intake duct 10 is roughly the same, the section of giving vent to anger is mild shape and closes up, angle between the center line of the valve stem that the center line of described intake duct 10 and its top are provided with is 8～45 °, preferred angle is 8～30 °, best angle is 8～15 °, and the embodiment's who provides in the accompanying drawing angle is 12 °.Above-mentioned angle conical surface angle and the radian that reality also will cooperate valve stem be set, little angle can guarantee the layout compactness of air flue and cylinder cap, can effectively reduce the overall weight of motor and save arrangement space.
As seen, the upper air and the valve of described intake duct 10 are tangent in Fig. 1,4,5, the lower stream of airflow of intake duct 10 and valve over against.As can be seen, intake duct 10 is more straight from the air flue central axis 13, and the no abrupt change of cross-section or shape flex point can at utmost reduce restriction loss; In addition, the upper air 11 among Fig. 1 is tangent substantially with valve, and it is interior over against casing wall to enter cylinder, utilizes casing wall and piston action to form and rolls stream, and lower stream of airflow 12 is extruded formation from gap between valve and the casing wall behind the impact valve and rolled stream over against valve.Flow coefficient is the size of air current flow resistance in the definition air flue, under the big more situation of flow coefficient, air-flow is subjected to flow resistance more little in air flue, and the shape of air flue is the principal element that influences the gas flow coefficient, Fig. 4,5 has represented the situation of in-cylinder tumble flow under the different rotating speeds, and this upper airway flow flow coefficient satisfies the demand of in-cylinder direct fuel-injection engine.
Among Fig. 2,3, the exterior contour of air flue core 60 is corresponding with the cavity geometry of intake duct 10, forms the necessary rational headspace of air flue 10 and installation valve guide bushing 40, air valve seat ring 50 during with the assurance casting.
This intake duct is fit to float and puts that 1.3L～1.6L directly sprays, the homogeneous combustion petrol engine.After entering in the cylinder via air flue, can produce, help forming in the cylinder mixed gas of homogeneous than the higher stream ratio that rolls.The simultaneously whole flow coefficient that is used for characterizing the upper airway flow dynamic resistance is also bigger, and flow coefficient is big more to show that flow resistance is more little, thereby significantly promotes the charging efficiency of motor.
Claims (7)
1, a kind of petrol engine air inlet is characterized in that: intake duct (10) is for flat and with the oblique valve place that extends to.
2, petrol engine air inlet according to claim 1, it is characterized in that: the aperture of the air inlet section of described intake duct (10) is roughly the same, the section of giving vent to anger is mild shape and closes up, and the angle between the center line of the valve stem that the center line of described intake duct (10) and its top are provided with is 8～45 °.
3, petrol engine air inlet according to claim 1, it is characterized in that: the aperture of the air inlet section of described intake duct (10) is roughly the same, the section of giving vent to anger is mild shape and closes up, the upper air and the valve of described intake duct (10) are tangent, the lower stream of airflow of intake duct (10) and valve over against.
4, petrol engine air inlet according to claim 1 and 2 is characterized in that: the angle between the center line of the valve stem that the center line of described intake duct (10) and its top are provided with is 8～30 °.
5, petrol engine air inlet according to claim 3 is characterized in that: the angle between the center line of the valve stem that the center line of described intake duct (10) and its top are provided with is 8～30 °, and preferred angle is 8～15 °.
6, petrol engine air inlet according to claim 4 is characterized in that: the angle between the center line of the valve stem that the center line of described intake duct (10) and its top are provided with is 8～15 °.
7, petrol engine air inlet according to claim 4 is characterized in that: the angle between the center line of the valve stem that the center line of described intake duct (10) and its top are provided with is 12 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100937502A CN101260844A (en) | 2007-12-05 | 2008-04-18 | Petrol engine intake duct |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710191211 | 2007-12-05 | ||
| CN200710191211.8 | 2007-12-05 | ||
| CNA2008100937502A CN101260844A (en) | 2007-12-05 | 2008-04-18 | Petrol engine intake duct |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101260844A true CN101260844A (en) | 2008-09-10 |
Family
ID=39961493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100937502A Pending CN101260844A (en) | 2007-12-05 | 2008-04-18 | Petrol engine intake duct |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101260844A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569867A (en) * | 2015-07-24 | 2016-05-11 | 襄阳市普创机电设备有限公司 | cylinder head for natural gas engine |
| CN105673248A (en) * | 2016-01-25 | 2016-06-15 | 重庆长安汽车股份有限公司 | High-tumble ratio air inlet channel of cylinder head of gasoline engine |
| CN110685836A (en) * | 2019-09-06 | 2020-01-14 | 浙江吉利新能源商用车集团有限公司 | Double-tumble air inlet passage and engine |
| CN110990959A (en) * | 2019-12-31 | 2020-04-10 | 义乌吉利动力总成有限公司 | Method and system for determining height of combustion chamber cavity |
| CN111664021A (en) * | 2020-06-02 | 2020-09-15 | 东风汽车集团有限公司 | Air inlet channel and air cylinder cover |
| CN111749783A (en) * | 2019-03-29 | 2020-10-09 | 长城汽车股份有限公司 | Engine air inlet channel, engine cylinder head and engine |
| CN113405759A (en) * | 2021-08-19 | 2021-09-17 | 潍柴动力股份有限公司 | Air passage tumble ratio rapid adjusting device and air blowing test device and method |
-
2008
- 2008-04-18 CN CNA2008100937502A patent/CN101260844A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105569867A (en) * | 2015-07-24 | 2016-05-11 | 襄阳市普创机电设备有限公司 | cylinder head for natural gas engine |
| CN105673248A (en) * | 2016-01-25 | 2016-06-15 | 重庆长安汽车股份有限公司 | High-tumble ratio air inlet channel of cylinder head of gasoline engine |
| CN111749783A (en) * | 2019-03-29 | 2020-10-09 | 长城汽车股份有限公司 | Engine air inlet channel, engine cylinder head and engine |
| CN110685836A (en) * | 2019-09-06 | 2020-01-14 | 浙江吉利新能源商用车集团有限公司 | Double-tumble air inlet passage and engine |
| CN110685836B (en) * | 2019-09-06 | 2021-04-02 | 浙江吉利新能源商用车集团有限公司 | Double-tumble air inlet passage and engine |
| CN110990959A (en) * | 2019-12-31 | 2020-04-10 | 义乌吉利动力总成有限公司 | Method and system for determining height of combustion chamber cavity |
| CN110990959B (en) * | 2019-12-31 | 2023-10-27 | 义乌吉利动力总成有限公司 | Method and system for determining height of combustion chamber cavity |
| CN111664021A (en) * | 2020-06-02 | 2020-09-15 | 东风汽车集团有限公司 | Air inlet channel and air cylinder cover |
| CN111664021B (en) * | 2020-06-02 | 2021-12-07 | 东风汽车集团有限公司 | Air inlet channel and air cylinder cover |
| CN113405759A (en) * | 2021-08-19 | 2021-09-17 | 潍柴动力股份有限公司 | Air passage tumble ratio rapid adjusting device and air blowing test device and method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080910 |