CN1519467A - Gas fuel supplying device of engine - Google Patents
Gas fuel supplying device of engine Download PDFInfo
- Publication number
- CN1519467A CN1519467A CNA2004100393685A CN200410039368A CN1519467A CN 1519467 A CN1519467 A CN 1519467A CN A2004100393685 A CNA2004100393685 A CN A2004100393685A CN 200410039368 A CN200410039368 A CN 200410039368A CN 1519467 A CN1519467 A CN 1519467A
- Authority
- CN
- China
- Prior art keywords
- aforementioned
- gas
- air suction
- gaseous fuel
- suction way
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Output Control And Ontrol Of Special Type Engine (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
A throttle valve 24 and a gas fuel control valve 25 are provided in the intake air passage 21 such that their axes are in parallel to each other and the former is positioned downstream the latter. An annular passage 43 for feeding a gas fuel is formed around the intake air passage 21 between the valves. The annular passage 43 and the intake air passage 21 are communicated with each other through gas discharging holes 44 formed between the passages. The gas discharging holes 44 are formed at positions which do not overlap with the axes of the valves and are axisymmetric with respect thereto as viewed in the axial direction of the intake air passage 21.
Description
Technical field
The present invention relates to supply with the gas-fuel feeder of the motor of liquefied petroleum gas (LPG) (LPG) and compressed natural gas gaseous fuels such as (CNG) to motor.
Background technique
As this gas-fuel feeder always, open that disclosed device is known in the clear 63-146152 communique for example in fact.As the gas mixer of disclosed gas-fuel feeder in the aforementioned communique, it adopts gaseous fuel to attracted to formation the air suction way from the ventilation unit of the upstream side that is located at closure.
This gas mixer, aforementioned ventilation unit separated into two parts vertically, the formation that its aeration portion with a part can be advanced and retreat and regulate with respect to the aeration portion of another part.In addition, this gas mixer is the gas supply port of aforementioned gaseous fuel with formed annular gap between aforementioned two aeration portions.
That is to say, in this gas mixer, in aforementioned ventilation unit, form the gaseous fuel path that is the ring-type of surrounding aforementioned air suction way.In addition, in aforementioned ventilation unit, form from the gaseous fuel path of aforementioned ring-type and extend to inboard radially and be communicated with the narrow slit of aforementioned gaseous fuel path and aforementioned air suction way.And aforementioned narrow slit does not interruptedly extend in the full week of aforementioned air suction way along the circumferencial direction of aforementioned air suction way.
In addition, at the axial direction (air-breathing flow direction) from aforementioned air suction way, aforementioned gas supply port shape is supplied with aforementioned gaseous fuel on the elongation line direction of the valve shaft of aforementioned closure.Moreover the specified prior art document, the applicant does not find the prior art document related with the present invention when application in the prior art documentation ﹠ info shown in this specification.
The gas mixer always that is constituted as mentioned above, if install for the miniaturization of seeking motor makes it approach cylinder head 3 ground, the output power that then produces aforementioned motor reduces such problem.
This problem particularly becomes outstanding when the aperture of aforementioned closure becomes big high speed operation.The reason that the output power of this motor reduces can be thought because by making aforementioned gas mixer approach cylinder head 3, supplies to the cause of aforementioned motor with the state of diffusion unevenly from aforementioned gas supply port institute gas supplied fuel.
That is to say, in this gas mixer, flow into the gaseous fuel of the aforementioned gaseous fuel path of ring-type, be inhaled into aforementioned air suction way in large quantities near the concentrated area, a position of the aforementioned narrow slit that is positioned at aforementioned gas supply port from aforementioned gas supply port.
Therefore, in this gas mixer, be inhaled into gaseous fuel in aforementioned air suction way side flow downstream hierarchically in aforementioned air suction way, in aforementioned air suction way, can not spread equably and be admitted in the firing chamber of aforementioned motor.
As a result, with the motor of this gas mixer always, the air fuel ratio distribution in its firing chamber produces irregular, and the combustible gas component in the indoor mixed gas of previous combustion forms dense part and rare part.
Therefore, in the motor of aforementioned usefulness gas mixer always, the combustion of mixed gas worsening condition in its firing chamber, thus NOx (nitrogen oxide) and HC (unburned hydrocarbons) in the waste gas are increased.
Moreover, for this problem, can pass through the shape of the air suction way of the aforementioned gas mixer of change, or the member that changes air-breathing flow direction is set, the dense relatively mixed gas of gas componant is concentrated near the spark plug, it is alleviated to a certain extent.
But, little a lot of because its gaseous fuel specific gravity is compared with gasoline in this gas-fuel feeder, be difficult so make dense relatively mixed gas near concentrating on aforementioned spark plug by above-mentioned such formation.
In addition, in aforementioned gas-fuel feeder always, because aforementioned mixed gas flows with different concentration stratifications in aforementioned air suction way as mentioned above, so in the occasion that the mixed gas distribution that is generated is arrived each cylinder of multicylinder engine, the air fuel ratio of the aforementioned mixed gas in each aforementioned cylinder can produce difference.
Therefore, in the multicylinder engine with aforementioned gas-fuel feeder always, the combustion regime that produces each cylinder is different and make output power reduce such problem.
And then, in aforementioned gas-fuel feeder always, because gaseous fuel is supplied in the aforementioned air suction way by the negative pressure (draft effect) that produces in the aforementioned ventilation unit.Therefore, in gas-fuel feeder always, the output power raising of seeking motor by the inhalation resistance that reduces aforementioned air suction way has the limit.
Moreover, for the problems referred to above, gaseous fuel is not supplied to aforementioned air suction way by on aforementioned air suction way, ventilation unit not being set, it is to a certain degree eliminated.But in aforementioned gas-fuel feeder always, if aforementioned ventilation unit is not set, the influence of valve shaft of closure that the ambient air that then is attracted to aforementioned air suction way is arranged to cross-section aforementioned air suction way is very big.
Therefore, in the gas-fuel feeder that aforementioned ventilation unit is not set, the position that forms the mobile difficulty of ambient air in its air suction way is easy to the position with mobile, thereby exists the irregular possibility of distribution generation of the gaseous fuel in the air suction way.Here, the flow position of difficulty of aforementioned so-called ambient air is meant the position in downstream side of the valve shaft of aforementioned closure.And the moving position that is easy to of aforementioned so-called ambient air stream is meant that aforementioned ambient air is not subjected to the position of the interference of aforementioned valve shaft.
Summary of the invention
The object of the present invention is to provide a kind of gaseous fuel diffusion and can improve the gas-fuel feeder of motor of the output power of motor equably in air suction way that makes.
The gas-fuel feeder of motor of the present invention, have: have the air suction way that imports ambient air and be communicated in the valve chest of gas supply port that gaseous fuel is sprayed into the gas spraying hole of aforementioned air suction way, be disposed at aforementioned air suction way aforementioned gas spraying hole upstream side and open and close the gaseous fuel control valve of aforementioned air suction way, and be disposed at aforementioned air suction way aforementioned gas spraying hole the downstream side and open and close the closure of aforementioned air suction way, on the position of concentrating the position of flowing that aforementioned gaseous fuel can be ejected into the aforementioned ambient air that imports aforementioned air suction way because of opening of aforementioned gaseous fuel control valve, form aforementioned gas spraying hole.
Above and other purpose of the present invention and feature are further illustrated embodiment's explanation hereinafter in conjunction with the drawings.
Description of drawings
Fig. 1 is that the summary pie graph according to the formation of the motor of the gas-fuel feeder of the 1st mode of execution of the present invention has been equipped in expression,
Fig. 2 is the longitudinal section of expression conduct according to the formation of the gas mixer of the gas-fuel feeder of the 1st mode of execution of the present invention,
Fig. 3 be among Fig. 2 along III-III line side cross sectional view,
Fig. 4 A is the sectional view of the formation of the cylindrical member in the air-breathing path of representing to be installed in the aforementioned gas mixer,
Fig. 4 B be among Fig. 4 A along B-B line side cross sectional view,
Fig. 5 is the perspective view that dissects the formation of the aforementioned gas mixer of expression when idle,
Fig. 6 is the perspective view that amplifies the major component of presentation graphs 5,
Fig. 7 is the perspective view of the formation of the aforementioned gas mixer when dissecing the operation of expression standard-sized sheet,
Fig. 8 is the plotted curve of the relation of expression rotating speed of aforementioned motor and output power,
Fig. 9 is the longitudinal section of expression conduct according to the formation of the gas mixer of the gas-fuel feeder of the 2nd mode of execution of the present invention.
Embodiment
Below, at length describe with regard to embodiments of the present invention with reference to accompanying drawing.
(the 1st mode of execution)
In Fig. 1 to Fig. 7, as the gas mixer 1 according to gas-fuel feeder of the present invention, it is installed on the cylinder head 3 of motor 2.Gas mixer 1 for example makes, and liquefied petroleum gas (LPG) (LPG) and compressed natural gas gaseous fuels such as (CNG) and air mixing supply to motor 2.
Sensor as aforementioned for example, can be the crankshaft angle sensor 13 that is installed on the cooling water temperature sensor 12 of motor 2 and is installed on motor 2.In addition, sensor as aforementioned can be the O that is installed on outlet pipe 14
2 Sensor 15 and the exhaust gas temperature sensor 16 that is installed on catalyst converter 6.And then the closure angle transducer 17 that sensor as aforementioned can also be provided in a side of on the gas mixer 1 is drawn the intake negative-pressure sensor 19 of using valve 18 with the negative pressure that is installed on the suction system of motor 2.
Gas mixer 1 as shown in Fig. 1 to Fig. 3 and Fig. 5, is installed with the closure 24 and the gaseous fuel control valve 25 of butterfly type in valve chest 23.In valve chest 23, form air suction way 21 and gaseous fuel path 22.In addition, in valve chest 23, be assembled with bleed valve 26 and IACV (Idle Air Control Valve) 27.
Closure 24 is located at the end of downstream side of the air suction way 21 in the valve chest 23.Gaseous fuel control valve 25 is located at the upstream-side-end of air suction way 21.
The mode that the valve shaft 24a of closure 24 and the valve shaft 25a of gaseous fuel control valve 25 are parallel to each other with two axial lines is rotated and is installed on valve chest 23 freely.
In addition, closure 24 is connected in unshowned acceleration operating element via wire rope etc.Closure 24 is operated artificially by aforementioned acceleration operating element opens and closes air suction way 21.
Closure 24 interconnects via linkage mechanism 28 (with reference to Fig. 1) with gaseous fuel control valve 25.
When linkage mechanism 28 for example is between the aperture of aperture in the early stage and 20～30% in the aperture of closure 24, gaseous fuel control valve 25 is rotated in the early stage between aperture position and the fully open position.
In addition, linkage mechanism 28 surpasses in the aperture of closure 24 under the state of aforementioned 20～30% aperture, makes gaseous fuel control valve 25 keep full-gear.
That is to say, the occasion that gaseous fuel control valve 25 is opened from A-stage at closure 24, it begins opening action with closure 24.In addition, gaseous fuel control valve 25 becomes standard-sized sheet when the aperture of closure 24 reaches 20～30% aperture, keep fully open position thereafter.
In addition, the occasion that gaseous fuel control valve 25 is closed from full-gear at closure 24 is even closure 24 beginning closing motions also keep full-gear.In addition, gaseous fuel control valve 25 is reduced to 20～30% aperture beginning closing motion from the aperture of closure 24, becomes A-stage with closure 24.
The longitudinal section of the formation of the gas mixer 1 of the state when Fig. 2 is the complete close the throttle 24 of expression when idle (state).As shown in Figure 2, in the aforementioned gas mixer 1 when idle, the valve body 24b of closure 24 is contacted with the wall of air suction way 21 in the scope in full week roughly.In addition, form the gap between the wall of the valve body 25b that sets at gaseous fuel control valve 25 of aforementioned gas mixer 1 when idle and air suction way 21.
In addition, when idle, ambient air flows in the bypass path 29 (seeing figures.1.and.2) that is formed at valve chest 23 in the mode of walking around closure 24 aforementioned.The gettering quantity of this ambient air is by being located at IACV (Idle Air Control Valve) 27 in the bypass path 29 and making the increase and decrease of path basal area and controlled.In addition, the aperture of IACV (Idle Air Control Valve) 27 is controlled by control unit 4.
Formed gaseous fuel path 22 in the valve chest 23 as shown in fig. 1, is connected in the closure 24 of air suction way 21 and the position between the gaseous fuel control valve 25.
In addition, gaseous fuel path 22 is connected in gas fuel tank 33 via gaseous fuel blocked valve 31 and regulator 32.
On this gaseous fuel path 22, with the attachment portion of air suction way 21 near be connected bleed air path 34 via bleed valve 26.
Gaseous fuel blocked valve 31 is for example closed gaseous fuel path 22 when slowing down.
Gaseous fuel blocked valve 31 has diaphragm type operator 31a.This gaseous fuel blocked valve 31 is drawn with pipe 18 introducing operator 31a from the negative pressure of motor 2 by intake negative-pressure and is closed.In addition, gaseous fuel blocked valve 31 is opened under above-mentioned situation in addition.
Aforementioned intake negative-pressure is undertaken by driving solenoid valve 35 by control unit 4 introducing of operator 31a and the switch motion that stops.
The equal structure of regulator that regulator 32 usefulness and the motor of equipping gas-fuel feeder are always used.Regulator 32 makes the pressure decompression of aforementioned gaseous fuel by leading to a plurality of underpressure chamber (not shown) from 33 gas supplied fuel of gas fuel tank.
On regulator 32, be provided with the valve 36 of the supply usefulness that stops aforementioned gaseous fuel.Valve 36 is driven by control unit 4.
Venting path 34 upstream-side-end are communicated in the atmosphere via air cleaner 37.Open by bleed valve 26 and to make intake negative-pressure from the 22 side effects of gaseous fuel path, ambient air supplies in the gaseous fuel path 22.
That is to say that the intake of the gaseous fuel by gaseous fuel path 22 inhale paths 21 can change by the aperture increase and decrease that makes bleed valve 26 from the intake of the ambient air of venting path 34 suction gaseous fuel paths 22 and adjust.
For example, suck the intake of the ambient air of gaseous fuel paths 22, increase by the aperture that increases bleed valve 26 from venting path 34.The minimizing of intake of gaseous fuel of flowing through gaseous fuel path 22 is corresponding with the increasing amount of the intake of this ambient air.
The aperture of bleed valve 26 is based on the O in the waste gas
2Concentration is by control unit 4 feedback control, so that the air fuel ratio that obtains stipulating.
In the air suction way 21 of gas mixer 1 and the attachment portion of gaseous fuel path 22, as shown in Fig. 2 and Fig. 3, form annulus 43.The inner core 41 that this annulus 43 forms by the cylindrical member by the part of the inner circle wall that constitutes air suction way 21, and the urceolus 42 of valve chest 23 that covers the peripheral part of this inner core 41 forms.
That is to say, the constituting of this gas mixer 1, aforementioned gaseous fuel supplies in the air suction way 21 from formed gas vent 44 on inner core 41 through gaseous fuel path 22 and annulus 43.
The inner core 41 of gas mixer 1 is adhered to the inner circle wall of the air suction way 21 of valve chest 23 by the binder (not shown).
As the method for the inner circle wall of the air suction way 21 that this inner core 41 is fixed in valve chest 23, except the method for using binder as mentioned above, also can be by being pressed into or being pressed into and rivet the method for carrying out.
Moreover, even in the occasion that adopts by the fixation method that is pressed into or is pressed into and rivet, preferably use binder simultaneously with the sealing of valve chest 23 in order to improve inner core 41.
In addition, on inner core 41, as shown in Fig. 4 A, the end in the downstream side of the interior circumferential portion of its large-diameter portion 45, towards the downstream side and internal diameter add megarelief gradually and become conical surface 45a.
On the other hand, the minor diameter 46 of inner core 41 internal diameter and external diameter on the gamut of axial direction becomes steady state value respectively.This minor diameter 46 equates with the internal diameter of the upstream-side-end of large-diameter portion 45.
In addition, the upstream-side-end of minor diameter 46 is contacted with the end of downstream side in formed tapering 47 (with reference to Fig. 2) on the valve chest 23 airtightly in complete all scopes.In this contact segment, do not produce step between the inner peripheral surface in the inner peripheral surface of aforementioned minor diameter 46 and aforementioned tapering 47.
By inner core 41 is installed on valve chest 23 in the mode that the upstream extremity of this minor diameter 46 is contacted with aforementioned tapering 47, as shown in Figure 3, between minor diameter 46 and valve chest 23 (urceolus 42), form aforementioned annulus 43 thus.
In gas mixer 1, as shown in Figure 3, with the inner peripheral surface of minor diameter 46 urceolus 42 in opposite directions of inner core 41 on, form and be used for from the gas supply port 48 of gaseous fuel path 22 supply gas fuel in annulus 43.
In addition, in gas mixer 1, on gas supply port 48, clamping restriction 22a.
That is to say that gaseous fuel path 22 and gas supply port 48 are positioned the sidepiece of closing side that becomes of closure 24 and gaseous fuel control valve 25.Here so-called two valves close side, be meant air-breathing main position of flowing when the aperture of closure 24 and gaseous fuel control valve 25 reduces.
In addition, so-called aforementioned two valves close side, be meant that in the side view shown in Fig. 2 closure 24 is closed with gaseous fuel control valve 25 under the state of locating to left down to tilt, and air-breathing flow direction is the occasion of the left-hand of Fig. 2, the underpart of air suction way 21 in Fig. 2.
In addition, in the gas mixer 1, as shown in Figure 3, the center line of gas supply port 48 points to the center C of air suction way 21.
On the minor diameter 46 of inner core 41, as shown in Fig. 4 A, 4B, be communicated with annulus 43 and a plurality of gas spraying holes 44 that are presented on slotted hole shape elongated on the circumferencial direction of minor diameter 46 of air suction way 21 interior formation.
As shown in Figure 3, axial direction from air suction way 21, except the position closure 24 and the valve shaft 24a of gaseous fuel control valve 25, the position that 25a overlaps (perisporium 46a, the 46b), it is that the center becomes on four positions of symmetry that this gas spraying hole 44 is formed at valve shaft 24a, 25a.
In addition, from the axial direction of air suction way 21, gas spraying hole 44 is formed at position (position beyond perisporium 46c, the 46d) that the center line with gas supply port 48 intersects and goes up and form.
In other words, gas supply port 48 is opened on the position of avoiding gas spraying hole 44.That is to say that gas spraying hole 44 sees in the aforementioned axis direction that with respect to gas supply port 48 being formed at valve shaft 24a, 25a is the position (avoiding perisporium 46d) that the center becomes symmetry.
In addition,, as shown in Figure 3, connect the 1st imaginary line L1 of an end of the center C of air suction way 21 and gas spraying hole 44, become 45 ° with angle between the 2nd imaginary line L2 of the other end that is connected center C and gas spraying hole 44 for each gas spraying hole 44.
Formed like this gas mixer 1 is installed on valve chest 23 by inner core 41, the internal diameter of the central part at inner core 41 places of the air suction way 21 in the gas mixer 1, as shown in Figure 2, less than the two end part of air suction way 21.
The internal diameter of the central part of this air suction way 21, set for the basal area of air suction way 21 at this central part place and air suction way 21 two end part substantial basal area about equally.
Here, the substantial basal area at the two end part of air suction way 21, the area that obtains for the area of contour that deducts closure 24 or gaseous fuel control valve 25 from the basal area (basal area that does not have the occasion of valve the air suction way 21) of reality (making two valves become the basal area of the valve of full-gear when the upstream side of inspiratory flow is seen).
That is to say, this gas mixer 1 the interior square tube of inner core 41 during to outside air the flow velocity of outside air do not rise.
The gas mixer 1 that is constituted like this, closure 24 is positioned at primary position (position that air suction way 21 is roughly closed) when idle, and gaseous fuel control valve 25 is positioned at small aperture position.
In addition, the idling speed control valve 27 of bypass path 29 is positioned at the idling aperture, and bleed valve 26 is positioned at the aperture of regulation.Fig. 5 and Fig. 6 illustrate the state of this gas mixer 1 when idle.
When this is idle, produce intake negative-pressure in the downstream side of gaseous fuel control valve 25, air sucks in the gas mixer 1 by the gap between gaseous fuel control valve 25 and the valve chest 23.
In addition, intake negative-pressure also acts on gaseous fuel path 22 and venting path 34 via the gas spraying hole 44 of inner core 41 with annulus 43.
Thereby, when this is idle, the gaseous fuel in the gaseous fuel path 22, and the air in the venting path 34 is attracted respectively.Whereby, aforementioned gaseous fuel mixes near the upstream side of gas supply port 48 with aforementioned air.Below, formed mixed gas in this gaseous fuel path 22, be called ' premixed gas '.
Aforementioned premixed gas is inhaled in the air suction way 21 by annulus 43 and gas spraying hole 44 by intake negative-pressure.
When aforementioned premixed gas was in gas supply port 48 is inhaled into annulus 43, the perisporium 46c of the minor diameter 46 of inner core 41 was positioned at and gas supply port 48 position in opposite directions.In addition, at this moment, intake negative-pressure acts on gas supply port 48 from horizontal (both sides of the circumferencial direction of annulus 43).
Whereby, aforementioned premixed gas shown in arrow among Fig. 3, along the circumferential direction flows in the annulus 43, is inhaled in the air suction way 21 from the gas spraying hole 44 at four positions.
Then, this premixed gas mixes the formation mixed gas with the air that comes from gaseous fuel control valve 25 1 effluents on one side in air suction way 21, by bypass path 29 to the downstream side of closure 24 supply with on one side.
Aforementioned mixed gas, then main if the aperture of closure 24 increases and becomes greater than the idling aperture, by the side supply downstream of formed gap between closure 24 and the valve chest 23.
At this moment, gaseous fuel control valve 25 is opened under aperture becomes state greater than the aperture of closure 24.Then, if the aperture of closure 24 reaches 20～30% aperture, then gaseous fuel control valve 25 becomes standard-sized sheet.And then even the aperture of closure 24 increases, gaseous fuel control valve 25 also remains in fully open position.
If closure 24 reaches full-gear, then in the air suction way in gas mixer 1 21, acting on intake negative-pressure about equally in whole zone.Fig. 7 illustrates the state in standard-sized sheet when operation of this gas mixer 1.
Under the state of this standard-sized sheet operation, intake negative-pressure acts in the whole zone of air suction way 21 equably.As a result, when standard-sized sheet moved, premixed gas just supplied in the air suction way 21 from the state of annulus 43 with diffusion equably.
Thereby in this gas mixer 1, aforementioned gaseous fuel leans against the negative pressure that produces between gaseous fuel control valve 25 and the closure 24 and is inhaled in the air suction way 21.
Whereby, in this gas mixer 1, set ventilation unit becomes unwanted in the aforementioned gas mixer always.
In addition, the gas spraying hole 44 in this gas mixer 1 does not cause at valve shaft 24a, the 25a of closure 24 and gaseous fuel control valve 25 on the position of air-breathing flow obstacle to form.In other words, formation is a plurality of on a large amount of positions of flowing, the ambient air concentrated area of gas spraying hole 44 in being drawn into air suction way 21.
Thereby in this gas mixer 1, aforementioned gaseous fuel supplies in the air suction way 21 on broad range and successfully supplies with to the downstream side of air suction way 21.
As a result, equipped the motor 2 of this gas mixer 1, the gettering quantity during high speed operation increases.In addition, in the motor 2 of having equipped this gas mixer 1, gaseous fuel is diffusion equably in air suction way 21, and output power is improved.
By the way, according to the experiment that the inventor carries out, show the motor of having equipped according to the gas mixer 1 of this 1st mode of execution 2, output power is improved as shown in Figure 8.
Fig. 8 is the shaft power of expression motor and the plotted curve of rotating speed.In Fig. 8, double dot dash line is illustrated on the cylinder head 3 directly to install from one gaseous fuel and supplies to the occasion of the gas mixer 1 in the air suction way 21.
In addition, in Fig. 8, the sucking pipe (not shown) that is shown in dotted line via about 300mm supplies to the occasion that air suction way 21 interior gas mixers 1 are installed on cylinder head 3 aforementioned from one gaseous fuel.
And then in Fig. 8, solid line illustrates the occasion (with reference to Fig. 1) that the gas mixer 1 according to this 1st mode of execution directly is installed on cylinder head 3.
As can be seen from Figure 8, state before use from one gaseous fuel and supply in the motor of the gas mixer in the air suction way 21, by and cylinder head 3 between clamp aforementioned sucking pipe, aforementioned gaseous fuel in air suction way 21 equably the diffusion, can increase its output power.
In addition, use the motor 2 of this gas mixer 1 as can be seen, the output power of the motor of its output power and aforementioned use sucking pipe about equally.
That is to say,, can both shorten aforementioned sucking pipe and seek the miniaturization of motor 2, increase the output power of motor 2 again by using this gas mixer 1.
In addition, gas mixer 1 is provided with perisporium 46 opposite to each other with gas supply port 48.Whereby, flow into the gaseous fuel of annulus 43, just the circumferencial direction along annulus 43 flows.
Thus, aforementioned gaseous fuel flows directly into ejiction opening 44 from supplying mouth 48 situation does not appear.And then in this gas mixer 1, aforementioned gaseous fuel circumferentially is directed along annulus 43, then from the ejiction opening ejection of the combustion gas at four positions.
Thus, in this gas mixer 1, aforementioned gaseous fuel is easier to be supplied to diffusely in the air suction way 21.
Thereby, in this gas mixer 1, in the interior circumferential portion of annulus 43, with gas supply port 48 in opposite directions the position and be that position that center become symmetry form perisporium 46c, 46d for gas supply port 48 with valve shaft 24a, 25a from the axial direction read fortune of air suction way 21.
Whereby, in this gas mixer 1, be the boundary with valve shaft 24a, 25a, the gaseous fuel of seeing from the axial direction of air suction way 21 that supplies to a side is with the intake equilibrium of the gaseous fuel that supplies to the opposing party.
Thereby, in this gas mixer 1, the side of aforementioned gaseous fuel in air suction way 21 irregular disappearance.Whereby, distribute roughly homogeneous and aforementioned gaseous fuel burns well of the air fuel ratio in the firing chamber of motor 2.
And then, in this gas mixer 1, be used for forming of the downstream side assembling of the inner core 41 of annulus 43 from ambient air mobile direction the air suction way 21 of valve chest 23.
Whereby, in this gas mixer 1, in the air suction way 21 that inner core 41 is assembled in valve chest 23 when, the instrument that is used for promoting inner core 41 contacts with the downstream side of anchor clamps from inner core 41.
Thereby, in this gas mixer 1, can make the air-flow in the downstream side of air suction way 21 not be formed on the pressure surface that is pushed of formed assembling usefulness on the inner core 41 with not being subjected to large disturbance.
In addition, in this gas mixer 1, even do not forming the aforementioned occasion that is pushed pressure surface, the vestige that contacts of aforementioned tools and anchor clamps also forms in the downstream side of inner core 41.Thereby in this gas mixer 1, the air-flow in the downstream side of air suction way 21 can not be subjected to big interference.
(the 2nd mode of execution)
Next, just describe according to the gas-fuel feeder of the 2nd mode of execution of the present invention.Fig. 9 is the longitudinal section of expression conduct according to the formation of the gas mixer of the gas-fuel feeder of this 2nd mode of execution.
Moreover, in Fig. 9, about with give same label and suitably omit its detailed description by the same or equal constituting component of the member of Fig. 1 to Fig. 7 explanation.
According to the gas mixer 91 of this 2nd mode of execution, as shown in Figure 9, the length of the axial direction of the minor diameter 43 of inner core 41 forms than the length of the appropriate section of aforementioned gas mixer 1 (with reference to Fig. 2) according to the 1st mode of execution and will grow.
In addition, in this gas mixer 91, the gas supply port 48 that gaseous fuel is supplied to annulus 43 forms on the position that the axial direction of air suction way 21 staggers with respect to gas spraying hole 44.
Gas mixer 91 is by adopting aforesaid formation, the gaseous fuel that flows into annulus 43 from gas supply port 48 annulus 43 in towards aforementioned axial direction mobile after, supply in the air suction way 21 from gas spraying hole 44.
Whereby, in this gas mixer 91, aforementioned gaseous fuel disappears from the situation that gas supply port 48 flows directly to gas spraying hole 44.
Thereby if with this gas mixer 91, then aforementioned gaseous fuel is introduced to the circumferencial direction of annulus 43.
Moreover for according to the gas spraying hole 44 that forms on the inner core 41 of the gas mixer 1,91 of aforementioned each mode of execution, it is not limited to the sort of slotted hole of diagram.In addition, gas spraying hole 44, its opening shape, quantity and formation position can suitably be changed.
For example, the slotted hole that gas spraying hole 44 can be tilted by the circumferencial direction with respect to inner core 11 forms, or is formed by circular hole.
In addition, in the gas mixer 1,91 according to aforementioned each mode of execution, also the mode that can extend with respect to the radial skew ground of inner core 41 forms gas spraying hole 44.In the occasion that adopts this formation, the thickness of the minor diameter part 46 of inner core 41 is greater than illustrated thickness.At this moment, be formed obliquely the ejection path (not shown) of the gaseous fuel that is communicated in gas spraying hole 44 in the mode that radially inwardly is positioned at the downstream side of inspiratory flow from annulus 43 gradually.
And then, in gas mixer 1,91, can make the gas spraying hole 44 that approaches gas supply port 48 1 sides different with the cross-sectional area of the opposing party's gas spraying hole 44 according to aforementioned each mode of execution.
The basal area of this gas spraying hole 44 for example, can form the cross-sectional area of the cross-sectional area of the gas spraying hole 44 that approaches gas supply port 48 1 sides less than other gas spraying holes 44.
In addition, in gas mixer 1,91 according to aforementioned each mode of execution, in annulus 43, can restriction be set in case the premixed gas approximate equality flow to all gas spraying holes 44.
So, at the cross-sectional area that changes gas spraying hole 44 one by one, or in annulus 43, be provided with in the gas mixer 1 (or 91) of restriction, gas supply port 48 adopts the formation at a place of the circumferencial direction that is positioned at annulus 43, promptly can supply with premixed gas equably from all gas spraying holes 44.
And then, in gas mixer 1,91, also can be the formation that on valve chest 23, forms gas spraying hole 44 according to aforementioned each mode of execution.In this occasion, gas supply port 48 can adopt the formation that forms at the peripheral part that is installed in valve chest 23 on the cylindrical member that split on the peripheral part of valve chest 23 forms.
As mentioned above, in the gas mixer 1 according to this 1st mode of execution, gas spraying hole 44 forms on the position of concentrating the position ejection gaseous fuel that flows to the ambient air that imports air suction way 21.
In this gas mixer 1, gaseous fuel is spread in the ambient air that imports in the air suction way 21 equably.Thereby if with this gas mixer 1, then aforementioned ambient air can mix on the efficient highland with aforementioned gaseous fuel, can increase the output power of motor 2.
In addition, according to the gas mixer 1 of this 1st mode of execution, the valve shaft 24a of closure 24 and the valve shaft 25a of gaseous fuel control valve 25 with do not interfere the ambient air that flows towards gas spraying hole 44 towards configuration in parallel to each other.
In this gas mixer 1,, still can concentrate and flow to gas spraying hole 44 although import the influence that the ambient air of air suction way 21 is subjected to valve shaft 25a.Thereby if with this gas mixer 1, the ambient air that then imports air suction way 21 can be taken into from the gaseous fuel of gas spraying hole 44 ejections on the efficient highland, and can aforementioned gaseous fuel successfully downstream side supply with.
In addition, according to the gas mixer 1 of this 1st mode of execution, between gas supply port 48 and gas spraying hole 44, formation is along the connection gas supply port 48 of the circumferencial direction of air suction way 21 and the annulus 43 of gas spraying hole 44.
In this gas mixer 1, supply with 48 gaseous fuels that flow into annulus 43 from gas, after along the circumferential direction flowing along annulus 43, supply in the air suction way 21 from gas spraying hole 44.Whereby, in this gas mixer 1, aforementioned gaseous fuel disappears from the situation that gas supply port 48 flows directly into the gas spraying hole.Thereby, if with this gas mixer 1, then can make to supply to gaseous fuels in the air suction way 21 from gas supply port 48 and become the state that is more prone to spread and supply with.
In addition, gas mixer 1 according to this 1st mode of execution, annulus 43 is formed by the inner circle wall that inserts the periphery wall of the inner core that gas spraying hole 44 is arranged 41 in the air suction way 21 from the inspiratory direction downstream side of air suction way 21 and form the valve chest 23 of air suction way 21.
In this gas mixer 1, when being assembled in valve chest 23, inner core 41 pushes the instrument and the anchor clamps of inner core 41, be contacted with the downstream side end face of inner core 41.Thereby, if with this gas mixer 1, aforementioned contact vestige then mixes in the end, downstream side of inner core 41 with aforementioned gaseous fuel, so even stayed the contact vestige of aforementioned tools with anchor clamps on the end face of the downstream side of inner core 41, can not bring harmful effect yet owing to aforementioned ambient air.
In addition, according to the gas mixer 1 of this 1st mode of execution, the periphery wall of inner core 41 is adhered to the inner circle wall of the air suction way 21 of valve chest 23 by binder.
In this gas mixer 1, even produce the occasion in gap between the inner circle wall of the periphery wall of inner core 41 and air suction way 21, aforementioned gap is also forward, and to state binder airtight.Thereby if with this gas mixer 1, the gaseous fuel that then supplies to annulus 43 disappears from the situation that aforementioned gap spills.
In addition, according to the gas mixer 1 of this 1st mode of execution, gas spraying hole 44 is communicated in the ejection path that sprays the aforementioned gaseous fuel that the mode of aforementioned gaseous fuel tilts with the downstream direction towards air suction way 21.
In this gas mixer 1, aforementioned premixed gas successfully flows into air suction way 21 from gas spraying hole 44.Thereby if with this gas mixer 1, then aforementioned gaseous fuel becomes in air suction way 21 and is more prone to diffusion.
In addition, gas mixer 1 according to this 1st mode of execution, can be the cross-sectional area of the ejection path that is communicated in the gas spraying hole 44 that approaches gas supply port 48, form less than the cross-sectional area that is communicated in away from the ejection path of the gas spraying hole 44 of the position of gas supply port 48.
The gas mixer 1 of Gou Chenging like this can homogeneous from the spray volume of the gaseous fuel that each sprayed of a plurality of gas spraying holes 44.If with this gas mixer 1, then ambient air mixes equably with gaseous fuel, the combustion efficiency of motor improves.
In addition, according to the gas mixer 1 of this 1st mode of execution, the valve body 24b, the 25b that are located on separately valve shaft 24a, the 25a of closure 24 and gaseous fuel control valve 25 are configured with the posture that keeps often tilting with respect to air suction way 21.
In this gas mixer 1, introduce the ambient air of air suction way 21, the plane of inclination along the valve body 25b of gaseous fuel control valve 25 becomes a side who is partial to air suction way 21 morely and flows (below among Fig. 2).
Therefore, in this gas mixer 1, gas supply port 48 is disposed at is positioned at by near the gas spraying hole 44 of the pathway side of the aforementioned ambient air of the plane of inclination route diversion of valve body 25b.
In this gas mixer 1, be positioned at by the gas spraying hole 44 of the pathway side of the aforementioned ambient air of the plane of inclination route diversion of valve body 25b and the span of gas supply port 48, it is shorter than the span of other gas spraying holes 44 and gas supply port 48.
Thereby if with this gas mixer 1, then gaseous fuel can be supplied with quickly with respect to the ambient air by the plane of inclination route diversion of valve body 25b, and aforementioned ambient air can mix on the efficient highland with aforementioned gaseous fuel.
In addition, gas mixer 1 according to this 1st mode of execution, when closure 24 and gaseous fuel control valve 25 are in full-gear, be disposed at the flow of aforementioned ambient air at position of the inner core 41 of air suction way 21, the flow set of the aforementioned ambient air at the position that is disposed with valve shaft 24a, the 25a of air suction way 21 becomes to equate.
In this gas mixer 1, as previously mentioned, the ventilation unit that is located on the aforementioned gas mixer always becomes unwanted.Thereby, if, then compare the inhalation resistance that can reduce to be attracted to the gaseous fuel in the air suction way 21 with the gas mixer always that aforementioned ventilation unit is arranged with this gas mixer 1.
In addition, according to the gas mixer 1 of this 1st mode of execution, the opening of annulus 43 sides of gas supply port 48 and gas spraying hole 44 is not located on the position of staggering on the circumferencial direction of air suction way 21 opposite to each other.
In this gas mixer 1,,, on the circumferencial direction of annulus 43, flow so flow into the gaseous fuel of annulus 43 because gas supply port 48 and perisporium 46 are in opposite directions.
Thereby, if with this gas mixer 1, then can, can be more prone to aforementioned gaseous fuel diffusely aforementioned gaseous fuel is supplied in the air suction way 21 from gas spraying hole 44 ejections at four positions to the circumferencial direction guiding of annulus 43.
In addition, according to the gas mixer 91 of this 2nd mode of execution, the opening of gas supply port 48 and annulus 43 sides of gas spraying hole 44, be not located at opposite to each other air suction way 21 axially on the position of staggering.
In this gas mixer 91, aforementioned gaseous fuel disappears from the situation that gas supply port 48 flows directly into gas spraying hole 44.Thereby, if, then can guide the circumferencial direction of aforementioned gaseous fuel and can be more prone to diffusely aforementioned gaseous fuel be supplied in the air suction way 21 to annulus 43 with this gas mixer 91.
The invention is not restricted to above-mentioned mode of execution, in not departing from the scope of the present invention, can carry out various changes and modification.
The Japanese patent application № 2003-022305 that the application proposed based on January 30th, 2003, its full content is included in herein by reference.
Claims (17)
1. the gas-fuel feeder of a motor, have: have the air suction way that imports ambient air and be communicated in the valve chest of gas supply port that gaseous fuel is sprayed into the gas spraying hole of aforementioned air suction way, be disposed at aforementioned air suction way aforementioned gas spraying hole upstream side and open and close the gaseous fuel control valve of aforementioned air suction way, and be disposed at aforementioned air suction way aforementioned gas spraying hole the downstream side and open and close the closure of aforementioned air suction way
On the position of concentrating the position of flowing that aforementioned gaseous fuel can be ejected into the aforementioned ambient air that imports aforementioned air suction way because of opening of aforementioned gaseous fuel control valve, form aforementioned gas spraying hole.
2. the gas-fuel feeder of motor as claimed in claim 1, wherein, aforementioned gaseous fuel control valve and aforementioned closure are made of the butterfly valve that opens and closes aforementioned air suction way by the rotation across the valve shaft of aforementioned air suction way ground configuration,
The aforementioned valve shaft separately of aforementioned gaseous fuel control valve and aforementioned closure disposes in parallel to each other not interfere towards the orientation of the mobile aforementioned ambient air of aforementioned gas spraying hole.
3. the gas-fuel feeder of motor as claimed in claim 2, wherein, between aforementioned gas supply port and aforementioned gas spraying hole, formation is along the aforementioned gas supply port of connection of the circumferencial direction of aforementioned air suction way and the annulus of aforementioned gas spraying hole.
4. the gas-fuel feeder of motor as claimed in claim 3, wherein, aforementioned annulus is engaged to the periphery wall of the cylindrical member that aforementioned gas spraying hole is arranged in the aforementioned air suction way by the inspiratory direction downstream side from aforementioned air suction way, forms with the inner circle wall of the aforementioned valve chest that forms aforementioned air suction way.
5. the gas-fuel feeder of motor as claimed in claim 4, wherein, the periphery wall of aforementioned cylindrical member is adhered to the inner circle wall of aforementioned valve chest by binder.
6. the gas-fuel feeder of motor as claimed in claim 1, wherein, aforementioned gas spraying hole is communicated in so that the ejection path of the aforementioned gaseous fuel that aforementioned gaseous fuel tilts to the mode of the downstream direction ejection of aforementioned air suction way.
7. the gas-fuel feeder of motor as claimed in claim 1, wherein, have a plurality of aforementioned gas spraying holes, make the cross-sectional area that is communicated near the ejection path of the aforementioned gaseous fuel of the aforementioned gas spraying hole of the position of aforementioned gas supply port, less than the cross-sectional area that is communicated in away from the ejection path of the aforementioned gaseous fuel of the aforementioned gas spraying hole of the position of aforementioned gas supply port, so that the spray volume homogeneous of the aforementioned gaseous fuel that is sprayed from each aforementioned gas spraying hole.
8. the gas-fuel feeder of motor as claimed in claim 2, wherein, aforementioned closure and aforementioned gaseous fuel control valve set with respect to the posture that aforementioned air suction way often tilts with the valve body that keeps being located on the aforementioned valve shaft,
Be positioned at forward state the plane of inclination of valve body and make route diversion aforementioned ambient air pathway side aforementioned gas spraying hole near the aforementioned gas supply port of configuration.
9. the gas-fuel feeder of motor as claimed in claim 2, wherein, when aforementioned closure and gaseous fuel control valve are in full-gear, the flow of the aforementioned ambient air at the position that aforementioned cylindrical member disposed of aforementioned air suction way becomes to equate with the flow set of the aforementioned ambient air at the position that aforementioned valve shaft disposed of aforementioned air suction way.
10. the gas-fuel feeder of motor as claimed in claim 2, wherein, aforementioned closure is connected via bindiny mechanism with aforementioned gaseous fuel control valve,
The structure of aforementioned bindiny mechanism is, aforementioned gaseous fuel control valve is rotated between aperture and the fully open position in the early stage, and following the aforementioned gaseous fuel control valve of state that surpasses the aperture of aforementioned regulation in the aperture of aforementioned closure is maintained at full-gear.
11. the gas-fuel feeder of motor as claimed in claim 3, wherein, aforementioned gas supply port and aforementioned gas spraying hole are at the opening of aforementioned annulus side, and the two is not located on the position of staggering on the circumferencial direction of aforementioned air suction way opposite to each other.
12. the gas-fuel feeder of motor as claimed in claim 3, wherein, aforementioned gas supply port and aforementioned gas spraying hole be at the opening of aforementioned annulus side, the two be not located at opposite to each other aforementioned air suction way axially on the position of staggering.
13. the gas-fuel feeder of motor as claimed in claim 3, wherein, have a plurality of aforementioned gas spraying holes, in aforementioned annulus, be provided with the restriction of the flow of the aforementioned gaseous fuel of restriction, so that the spray volume homogeneous of the aforementioned gaseous fuel that from each aforementioned gas spraying hole, is sprayed.
14. the gas-fuel feeder of motor as claimed in claim 3, wherein, aforementioned gas spraying hole forms on aforementioned valve chest,
Aforementioned gas supply port forms on the cylindrical member of the peripheral part that is installed in aforementioned valve chest.
15. the gas-fuel feeder of motor as claimed in claim 4, wherein, the inner peripheral surface of the inspiratory direction end of downstream side of aforementioned cylindrical member is by along with the conical surface that strengthens gradually towards the downstream side internal diameter forms.
16. a motor, it has the described gas-fuel feeder of claim 1.
17. a Motor Vehicle, it is equipped with the described motor of claim 16.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP022305/2003 | 2003-01-30 | ||
| JP2003022305A JP2004232554A (en) | 2003-01-30 | 2003-01-30 | Device for feeding gas fuel to engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1519467A true CN1519467A (en) | 2004-08-11 |
Family
ID=32951403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2004100393685A Pending CN1519467A (en) | 2003-01-30 | 2004-01-30 | Gas fuel supplying device of engine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004232554A (en) |
| CN (1) | CN1519467A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297744A (en) * | 2010-06-23 | 2011-12-28 | 罗伯特·博世有限公司 | Method for operating an internal combustion engine |
| CN104696114A (en) * | 2015-02-16 | 2015-06-10 | 杭州赫日新能源科技有限公司 | Two-stage controlled Venturi inlet gas mixer |
| CN112412565A (en) * | 2020-12-08 | 2021-02-26 | 陈谦 | Air throttle that drum-type admitted air |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4520893B2 (en) * | 2005-04-08 | 2010-08-11 | アイシン精機株式会社 | Engine mixer, engine-driven air conditioner, engine-driven power generator |
-
2003
- 2003-01-30 JP JP2003022305A patent/JP2004232554A/en not_active Withdrawn
-
2004
- 2004-01-30 CN CNA2004100393685A patent/CN1519467A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297744A (en) * | 2010-06-23 | 2011-12-28 | 罗伯特·博世有限公司 | Method for operating an internal combustion engine |
| US9222841B2 (en) | 2010-06-23 | 2015-12-29 | Robert Bosch Gmbh | Method for operating an internal combustion engine |
| CN102297744B (en) * | 2010-06-23 | 2016-12-21 | 罗伯特·博世有限公司 | Method for internal combustion engine |
| CN104696114A (en) * | 2015-02-16 | 2015-06-10 | 杭州赫日新能源科技有限公司 | Two-stage controlled Venturi inlet gas mixer |
| CN112412565A (en) * | 2020-12-08 | 2021-02-26 | 陈谦 | Air throttle that drum-type admitted air |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004232554A (en) | 2004-08-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1248775C (en) | Fluid processing system and method | |
| CN1083527C (en) | Cylinder oil injection type IC engine | |
| EP1992804B1 (en) | Two-cycle engine | |
| CN100335767C (en) | Fuel injection controller for internal combustion engine | |
| CN101054934A (en) | Throttle control apparatus and method for throttle control | |
| CN1059949C (en) | Method for improving the operation of an air-scavenged supercharged heat engine and heat engine thereof | |
| CN1796749A (en) | Engine control system | |
| CN1690406A (en) | Fuel injector designed to optimize pattern of fuel spray | |
| CN1298983C (en) | Controller of internal combustion engine | |
| CN101054936A (en) | Throttle control apparatus and method for throttle control | |
| CN1104551C (en) | Internal combustion engine having combustion heater | |
| CN101069042A (en) | Premixing combustion burner for gas turbine | |
| CN1637255A (en) | Engine controller | |
| CN1619129A (en) | Aft FLADE engine | |
| CN1372617A (en) | Direct-injection spark ignition engine | |
| CN101063668A (en) | Gas sensor equipped with cover assembly designed to minimize splashing of sensor element with water | |
| CN1084829C (en) | Cylinder injection type IC engine | |
| CN1839255A (en) | Exhaust gas recirculation device for internal combustion engine | |
| CN1611766A (en) | Fuel jet device for IC engine and method and fuel jet valve | |
| CN1490504A (en) | Fault tester for IC engine | |
| CN1705818A (en) | Engine | |
| CN1519467A (en) | Gas fuel supplying device of engine | |
| CN1057586C (en) | Fuel spray pump | |
| US9086038B2 (en) | Airflow attachment assembly for carburetor | |
| JP4657250B2 (en) | Intake device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |