CN202039957U

CN202039957U - Engine air inlet structure

Info

Publication number: CN202039957U
Application number: CN2011201367541U
Authority: CN
Inventors: 黄志伟; 林冠旭; 许文诚
Original assignee: Sanyang Industry Co Ltd
Current assignee: Sanyang Industry Co Ltd
Priority date: 2011-04-29
Filing date: 2011-04-29
Publication date: 2011-11-16
Anticipated expiration: 2021-04-29

Abstract

The utility model relates to an engine air inlet structure which comprises an air inlet and a valve body. The valve body is pivoted into the air inlet, can rotate to a second position from a first position in a pivoted mode and comprises a pair of first openings which are communicated with each other and run through each other and a pair of second openings which are communicated with each other and run through each other. The area of any one first opening is larger than the area of at least one of the second openings. When the valve body is positioned at the first position, the circulation area of the air inlet is defined by the areas of the first openings. When the valve body is positioned at the second position, the circulation area of the air inlet is defined by the areas of the second openings. Therefore, a valve device cannot generate negative effects on flowing of air flow in the air inlet, and the air inlet efficiency is effectively promoted.

Description

The engine air admittance structure

Technical field

The utility model relates to a kind of engine air admittance structure, refers to a kind of engine air admittance structure that is applicable to motor vehicle especially.

Background technique

In the engine design of general motor vehicle, for example locomotive, for the combustion process of improving its engine and improve engine combustion efficient, except the air inlet that makes locomotive engine, be uniformly mixed into the oil gas with the fuel oil of nozzle ejection, in order to impel engine can further reach low oil consumption, oligosaprobic lean combustion, then must make the air inlet of engine produce the vortex state.

In the engine design now, except installing vortex control valve device (Swirl Control Valve additional; SCV) to increase the vortex air-flow, to promote outside the vortex ratio of air inlet, the butterfly of employing clack valve sheet is also arranged, use the effect that reaches lean combustion to reduce intake duct and then to form the single valve air inlet to produce the vortex air-flow.

Yet the above-mentioned practice all can't effectively be produced as and reach the lean combustion limit, its needed laminar flow air inlet and gas-liquid separation.Therefore there is known techniques to develop improvement in addition at described purpose.

With reference to figure 1, it illustrates known engine air admittance structural representation.This known air intake structure includes an intake duct 1 and is hubbed at one in the intake duct 1 and rotates valve block 2.By the rotation of outer link control valve block causing the variation of intake duct circulation area, and also difference to some extent of inlet flow field, main purpose is the gas motion that produces vortex and rolling, promotes combustion efficiency by this.

There is a shortcoming in above-mentioned conventional construction, that is when engine during in high rotating speed, even valve block 2 turns to the position (valve block 2 positions when dotted line is represented the engine slow-speed of revolution) shown in the figure solid line, 2 of valve blocks still form a kind of obstacle in intake duct 1, make intake duct 1 as being cut apart, so reduction is drawn sincere performance performance.

The model utility content

The purpose of this utility model provides a kind of engine air admittance structure, and its engine has better intake efficiency compared to known structure under high-speed state.Promote engine performance.

The purpose of this utility model is achieved in that the engine air admittance structure comprises an intake duct, reaches a valve body.Above-mentioned valve body is hubbed in the intake duct, can be switched to a second place from a primary importance.Valve body includes a pair of first opening that directly passes through connection, and directly passes through a pair of second opening of connection, and the area of arbitrary first opening is greater than second opening area of one of them at least.

When valve body is positioned at primary importance, be the circulation area that defines intake duct with first opening; When valve body is positioned at the second place, be the circulation area that defines intake duct with second opening.

Design by said structure, except that engine is possessed the variable air inlet effect, though engine under high-speed state, inlet flow can not be subjected to the obstruction of cutting apart of valve, and can flow in the cylinder head, so better intake efficiency is arranged compared to known structure with complete circulation area.In addition, in the engine when load two pass that produces, off normal air-guiding also allow air inlet effect under this state compare conventional designs more to promote.

Another aspect of engine air admittance structure of the present utility model comprises an intake duct and a valve body, wherein valve body comprises one first separate halfbody and one second halfbody, first halfbody is fixed in the intake duct, and second halfbody is hubbed in the intake duct and can be switched to a second place from a primary importance.

Above-mentioned first halfbody includes a pair of first limit wall, and second halfbody includes a pair of second limit wall, reaches a pair of the 3rd limit wall.When second halfbody is switched to primary importance, corresponding a pair of first opening that directly passes through connection that crosses of the first limit wall with the second limit wall, this moment, valve body defined the circulation area of intake duct with first opening.When second halfbody is switched to the second place, corresponding a pair of second opening that directly passes through connection that crosses of the first limit wall with the 3rd limit wall, this moment, valve body defined the circulation area of intake duct with second opening, and the area of arbitrary first opening is greater than one of them area of second opening.

This kind structural design reaches engine equally under high-speed state, and inlet flow can not be subjected to the obstruction of cutting apart of valve, and can flow to effect in the cylinder head with complete circulation area.

The above-mentioned primary importance and the second place can be designed to differ 90 degree.Above-mentioned first opening can be different shape, for example circle, ellipse etc., and preferably, first opening is identical with engine air admittance degree of lip-rounding shape.

Above-mentioned valve body can be formed with a pair of pivot post to be articulated in the intake duct in dual-side.Valve body more can two pivot posts one of them be linked to a motor and turned moving.Certainly, valve body is driven with a linkage mechanism.Can be folded with an elastomer seal between valve body and the intake duct, to avoid gas leakage.

Description of drawings

The known engine air admittance structural representation of Fig. 1.

Fig. 2 is the engine air admittance STRUCTURE DECOMPOSITION figure of the utility model first preferred embodiment.

Fig. 3 A is engine valve body schematic cross-section under high rotating speed of the utility model first preferred embodiment.

Fig. 3 B is engine intake duct flow field schematic representation under high rotating speed of the utility model first preferred embodiment.

Fig. 4 A is engine valve body schematic cross-section under the slow-speed of revolution of the utility model first preferred embodiment.

Fig. 4 B is engine intake duct flow field schematic representation under the slow-speed of revolution of the utility model first preferred embodiment.

Fig. 5 A is engine valve body schematic cross-section under medium speed of the utility model first preferred embodiment.

Fig. 5 B is engine intake duct flow field schematic representation under medium speed of the utility model first preferred embodiment.

Fig. 6 is the engine air admittance STRUCTURE DECOMPOSITION figure of the utility model second preferred embodiment.

Fig. 7 is engine valve body schematic cross-section under high rotating speed of the utility model second preferred embodiment.

Fig. 8 is engine valve body schematic cross-section under the slow-speed of revolution of the utility model second preferred embodiment.

The primary component symbol description

Intake duct

1,11,31 rotate valve block 2

Cylinder head 10

valve bodies

12,32

First opening 13,14,37,38

second openings

15,16,39,40

Elastomer seal 17

pivot posts

21,22,36

Motor 23 first halfbodies 33

The first limit wall, 331,332 second halfbodies 34

The second limit wall 341,342 the 3rd limit wall 343,344

Linkage mechanism 35 direction P1, P2, P3

Embodiment

With reference to figure 2, be the engine air admittance STRUCTURE DECOMPOSITION figure of the utility model first preferred embodiment.One locomotive engine includes a cylinder head 10, reaches an intake duct 11 that is loaded on the cylinder head suction port from outer set, and the cylinder head suction port is separated into two fork roads again in inside, then be pivoted with a valve body 12 in the intake duct 11.

Above-mentioned valve body 12 slightly is cylindric, and cylinder two flat sides set projection respectively have a

pivot post

21,22, and valve body 12 promptly is to be hubbed in the intake duct 11 with two pivot posts 21,22.Pivot post 22 also links with a motor 23, utilizes motor 23 to order about valve body 12 by this and pivots in intake duct 11.

Especially, valve body 12 fashions into following structure: valve body 12 surfaces are formed with a pair of

first opening

13,14, two openings, 13, the 14 mutual correspondences and directly pass through connection; Upwards to be formed with a pair of second opening, 15,16, two

openings

15,16 in addition equally also be corresponding mutually and directly pass through connection in the position of a predetermined angle at interval with

first opening

13,14 in week.

Approximately slightly circles and area are identical for two

first openings

13,14 in this example, and second opening 15 is less than another second opening 16, and first opening, 13,14 areas are greater than second opening, 15 areas.

When valve body 12 is installed on intake duct, more be provided with elastomer seal 17,, produce the gas leakage situation to avoid these positions as materials such as Furtulon, silica gel in visual angle, cross section upper and lower group.

With reference to figure 2, Fig. 3 A, Fig. 3 B is valve body schematic cross-section under the high rotating speed of engine and intake duct flow field schematic representation.When engine is in high-revolving state, drive valve bodies 12 with motor 23 and make it be switched to position as icon, claim primary importance.This moment, first opening, 13,14 direction P2 were parallel to the direction P1 of intake duct, and gas flow can only be via first opening 13,14 by entering two fork roads of cylinder head 10 in the intake duct 11.So valve body 12 is the circulation area that defines intake duct 11 with

first opening

13,14 in this stage.And gas is to flow through a complete openings, but not as known through the obstruct obstacle of valve block itself.Preferably, first opening 13,14 is dimensioned to identical with cylinder head air inlet port.

With reference to figure 2, Fig. 4 A, Fig. 4 B is valve body schematic cross-section under the engine slow-speed of revolution and intake duct flow field schematic representation.When engine is in slow-revving state, drive valve bodies 12 with motor 23 and make it be switched to position as icon, claim the second place (primary importance and the second place differ 90 and spend).This moment, second opening, 15,16 direction P3 were parallel to the direction P1 of intake duct, and gas flow can only wherein one be pitched the road by entering in the cylinder head 10 via

second opening

15,16 in the intake duct 11.Therefore valve body 12 is the circulation area that defines intake duct 11 with

second opening

15,16 in this stage.Because this moment, opening area was to have diminished compared to the opening area in above-mentioned Fig. 3 A stage, therefore meet engine slow-speed of revolution demand, and charge air flow also can produce the vortex effect.

With reference to figure 2, Fig. 5 A, Fig. 5 B is valve body schematic cross-section under the engine medium speed and intake duct flow field schematic representation.When engine was in medium speed (middle load) between the above-mentioned high rotating speed and the slow-speed of revolution, valve body 12 turned to position shown in the figure, and the intake duct circulation area of being opened this moment is between maximum value (first opening area) and minimum value (second opening area).It should be noted that this stage is bilateral average air inlet, also can flow into two fork roads of cylinder head simultaneously, and because top, the inclined to one side cross section of the aperture position that is presented has the effect of air-flow toward the top guiding.Through this kind of experiment confirm Flow Field Distribution than known valve block in during aperture (among Fig. 1 between solid line valve block and the dotted line valve block) better, can allow engine that better usefulness is arranged.

With reference to figure 6, be second embodiment's engine air admittance STRUCTURE DECOMPOSITION figure.In the present embodiment, valve body 32 is by two separate bulk-breakings: one first halfbody 33 and one second halfbody 34 are constituted.First halfbody 33 is fixed in the intake duct 31, and second halfbody 34 is hubbed in the intake duct 31 with the pivot post 36 of side.Therefore second halfbody 34 can be switched to a second place from a primary importance equally.In this example, valve body 32 is driven by a linkage mechanism 35.

Particularly, first halfbody 33 includes a pair of first limit wall, 331,332, second halfbody 34 corresponding and that shape is symmetrical and includes a pair of second limit wall 341,342 and corresponding a pair of the 3rd limit wall 343,344 corresponding and that shape is symmetrical.

With reference to figure 7, when engine in high rotating speed and second halfbody 34 when being switched to primary importance, 2 first limit walls 331,332 cross pair of straight with 2 second limit walls, 341,342 correspondences respectively and pass through and be communicated with and the first slightly rounded opening 37,38.This moment, valve body 32 promptly defined the circulation area of intake duct 31 with this 2 first opening 37,38.

With reference to figure 8, when engine in the slow-speed of revolution and second halfbody 34 rotates 90 when spending to the second place from above-mentioned primary importance, 2 first limit walls 331,332 cross a pair of second opening 39,40 with 2 the 3rd limit walls, 343,344 correspondences respectively.This moment, valve body 32 promptly defined the circulation area of intake duct 31 with this 2 second opening 39,40, and wherein one second opening 39 areas that are positioned at the stream downstream are less than first opening area, so meet the slow-revving air inlet demand of engine.

Similarly, if second halfbody 34 is switched between the above-mentioned primary importance and the second place, then be to be applicable to the situation of loading in the engine.

Claims

1. engine air admittance structure is characterized in that comprising:

One intake duct; And

One valve body, be hubbed in this intake duct, be to be switched to a second place from a primary importance, include a pair of first opening that directly passes through connection, and directly pass through a pair of second opening of connection, and the area of arbitrary first opening greater than this to second opening area of one of them at least, wherein, when this valve body is positioned at this primary importance, be the circulation area that first opening is defined this intake duct with this; When this valve body is positioned at this second place, be the circulation area that second opening is defined this intake duct with this.

2. engine air admittance structure as claimed in claim 1 is characterized in that this primary importance and this second place differ 90 degree.

3. engine air admittance structure as claimed in claim 1 is characterized in that this valve body is formed with a pair of pivot post in dual-side.

4. engine air admittance structure as claimed in claim 3 is characterized in that one of them is linked to a motor and is turned moving this valve body to the pivot post with this.

5. engine air admittance structure as claimed in claim 1 is characterized in that this is rounded to first opening.

6. engine air admittance structure as claimed in claim 1 is characterized in that being folded with an elastomer seal between this valve body and this intake duct.

7. engine air admittance structure is characterized in that comprising:

One intake duct; And

One valve body, comprise one first separate halfbody and one second halfbody, this first halfbody is fixed in this intake duct, it is to be switched to a second place from a primary importance that this second halfbody is hubbed in this intake duct, wherein this first halfbody includes a pair of first limit wall, this second halfbody includes a pair of second limit wall, reaches a pair of the 3rd limit wall, when this second halfbody is switched to this primary importance, should to the first limit wall with this to corresponding a pair of first opening that directly passes through connection that crosses of the second limit wall, this valve body defines the circulation area of this intake duct with this to first opening; When this second halfbody is switched to this second place, should to the first limit wall with this to corresponding a pair of second opening that directly passes through connection that crosses of the 3rd limit wall, this valve body defines the circulation area of this intake duct with this to second opening, and the area of arbitrary first opening greater than this to one of them area of second opening.

8. engine air admittance structure as claimed in claim 7 is characterized in that this primary importance and this second place differ 90 degree.

9. engine air admittance structure as claimed in claim 7 is characterized in that this second halfbody is linked to a linkage mechanism and is turned moving.

10. engine air admittance structure as claimed in claim 7 is characterized in that this is rounded to first opening.