CN85101645A - Fuel control unit - Google Patents
Fuel control unit Download PDFInfo
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- CN85101645A CN85101645A CN 85101645 CN85101645A CN85101645A CN 85101645 A CN85101645 A CN 85101645A CN 85101645 CN85101645 CN 85101645 CN 85101645 A CN85101645 A CN 85101645A CN 85101645 A CN85101645 A CN 85101645A
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- idling
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- mixed gas
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Abstract
Internal-combustion engine is fuel cut-off when slowing down or brake.The Carburetor of gasoline preferably has: one is connected to the idling mixed gas passage of throttle valve downstream idling oil gas vent, one or more idling outlet upstreams that are positioned at, adjacent to the acceleration outlet of throttle valve closed position, one matches with idling outlet forms a joint by the tortuous passageway of idling mixed gas passage by being exported to the throttle valve downstream, one supplies the device of idling mixed gas passage downstream ventilation when engine brake or deceleration, make that at least sonic flow is discharged by tortuous passageway when ventilation, and there are enough ventilating airs to enter the downstream of idling mixed gas passage, avoiding from the engine air admittance manifold via idling outlet with quicken outlet sucking-off fuel, not having when guaranteeing to ventilate has fuel-air mixed gas to be sucked out along this passage.
Description
Present invention is directed to the Fuel Control System of any pattern internal combustion engine, the method and apparatus that reduces relevant for the fuel consume that makes internal combustion engine particularly is especially for the engine of powered vehicle use.
In this kind engine deceleration, engine is actual is as a kind of pump in work, try and will suck gas from intake manifold, make to form the quite vacuum of height in the intake manifold.For example, have Carburetor, among the engine by gasoline driven, export in idling at one
A height suction is arranged, and therefore the mixed gas of sucking-off gasoline air also may make that the mixed gas with quite dense oil content enters the firing chamber at contiguous acceleration outlet sucking-off oil gas.This can cause highly polluted waste gas, and waste fuel.The technology that generally is used for avoiding on automobile forming the increase of this kind pollution provides relatively quite a large amount of air, though this has lowered pollution, has also reduced the effectiveness of engine brake.And also waste fuel oil.
The present invention's purpose is to provide solution to the problems described above for the internal combustion engine of all patterns.
The engine that uses gasoline can have the Carburetor of certain form usually; wherein a kind of common Carburetor includes a butterfly throttle valve; enter the amount of the air of intake manifold for control; one main vent line outlet; when running up, oil and Air mixing gas lead thus that oil export is sucked out and an idling goes out oil export; when low-speed running, fuel-air mixture idling thus goes out oil export and is sucked out.Idling goes out the downstream that oil export is usually located at pent butterfly throttle valve, and the master goes out the upstream that oil export then is positioned at throttle valve, does not just produce effect under the idling situation usually.Therefore when engine deceleration, go out oil export through an idling thus and once be sucked out quite a large amount of fuel oils, cause waste.
The engine that oil gas drives can have the vaporizer of certain form usually with the oil gas vaporization with liquid state.Avoid and the above-mentioned problem that uses the engine of gasoline, the oil gas supply to the engine air admittance manifold when slowing down must be blocked.
As for diesel motor, when slowing down, also must block the supply of fuel oil.
According to internal combustion engine of the present invention, the supply of its fuel oil, no matter be gasoline, oil gas or diesel oil all should cut off when engine deceleration or brake.
In the situation of gasoline engine, the preferred embodiment one of according to the present invention, a Carburetor has an idling mixed gas passage, be connected to an idling oil gas vent that is positioned at the throttle valve downstream, with dispensable, be positioned at idling outlet upstream, be adjacent to one or more acceleration outlets of the closed position of throttle valve, a plug-in unit, match to form the passage of complications with the idling outlet, connect by being exported to the downstream of throttle valve by the idling mixed gas passage, with the device that when engine brakes or slow down, supplies idling mixed gas passage downstream ventilation, make and discharge via the tortuous passageway of plug-in unit at the ventilation sonic flow at least, and when having enough ventilating airs to enter the downstream of idling mixed gas passage, can avoid from the engine air admittance manifold via idling outlet and acceleration outlet (if having) sucking-off fuel, to guarantee when ventilating, never having fuel-air mixed gas to be sucked out along this passage.
This plug-in unit preferably has an axial passage, is connected in more than one crosspassage, and with being connected of idling mixed gas passage than the lower end.This a series of passage forms by the air of idling outlet and a zigzag path of fuel-air mixed gas, therefore forms sonic flow.This design has an advantage, promptly when the normal idle running of engine, can increase the degree of fuel-oil atmozation, makes fuel more complete in the engine internal combustion.Therefore when idle commentaries on classics even low horsepower running, the mixed gas that engine can be comparatively thin is operated, the saving of reaching fuel oil.
At last, plug-in unit should stretch for outside the air passage wall, disturbs the cohesion that causes fuel oil to drip to keep away on this wall.
A significant advantage of the present invention is, only needs on existing Carburetor in addition that minimum change gets final product, but is applied in the almost engine of any size, and the operative scenario on the Carburetor of any this type is but very good.Like this, the Carburetor that this kind has the idling MAS Mixture Adjust Screw all can unload screw, and this plug-in unit is inserted in the hole of idling outlet.
Air-breather can be positioned at vent valve than distant positions with what pipe connected by comprising one, and this valve can utilize electromagnetic coil to be controlled, and the high vacuum that the throttle valve downstream occurs in the time of can be with engine deceleration starts.Whether this high vacuum does not need direct measurement, as long as utilize to measure engine speed, for example utilizes the centrifugal force speed switch, or utilizes the speed of measuring firing pulse, or utilizes to rotate on bent axle and produce light pulse, or utilize throttle valve to open can to predict.Like this, these devices can surpass a certain degree in the vacuum in throttle valve downstream, that is engine brake or start when slowing down ventilates, in order to avoid fuel continues to send.Vacuum in the manifold can also directly be measured, and for example utilizes a switch with pressure operation to measure.
When the adjustment spiral shell of idling outlet is replaced according to device of the present invention, still to provide a kind of method of adjusting the idling mixed gas.This can utilize under the normal operation situation via air-breather provides one adjustablely often to decide air stream and accomplish.Like this, utilize the speed of control air-flow, the concentration of idling mixed gas can optionally be adjusted, and needn't really mechanically remove to transfer Carburetor, because air-flow can provide near vent valve from Carburetor.And the air-flow that continues also can avoid gasoline to gather at air-breather.
Be shown among Fig. 1 according to the example of the Carburetor of this idea of the present invention action.
Only demonstrate the sub-fraction of Carburetor 10 among Fig. 1.This comprises the idling/acceleration channel 14 of a primary air passage 12, as the fuel-air mixture passage.The control of flowing through the air of air passageways 12 is to utilize traditional butterfly pivot valve to control.
One idling outlet 18 is located between the air passageways 12 of passage 14 than lower end and butterfly valve 16 downstreams.Among traditional Carburetor, this outlet 18 is opened, and is carved with and accommodates one among the opening 20 of screw thread and adjust the screw (not shown), and the top of this screw is transferred in the annex of outlet 18 with the size of control opening and control the concentration of mixed oil and gas.
But in Carburetor of the present invention, do not have the idling MAS Mixture Adjust Screw of screw thread, opposite, other has a plug-in unit 24 to protrude in outlet 18.This plug-in unit has a center-aisle 26, and the inner of passage and a horizontal passage 28 are connected.Plug-in unit 24 is retained in the idling outlet 18 by a pressure spring 30, and the tube equipment spare 32 that this spring 30 is contained within the opening 20 with screw thread plug-in unit with screw thread links together.
The axial passage 34 that device part 32 has a hollow is connected to the downstream of idling mixed gas passage 14, and is connected to a control unit 40 in a distant place with pliability pipe 36.
Also be located at some the acceleration outlets 42 that also have between passage 14 and the primary air passage 12.Be not that all Carburetors all have these outlets, an opening is arranged sometimes, two or more then are a groove shape opening sometimes sometimes.They are arranged on and are adjacent to very much the position of butterfly valve 16 when closing.Extra fuel-air mixture is by wherein and by idling exporting generally.
Fig. 2 shows the circuit of control electromagnetic coil 52 actions in the mode of schematic representation.So, the acts may of coil is by electronic speed switch 56, and for example the combination of a pulse integrated circuit and a throttle valve position sense switch 60 is controlled, wherein relay of switch 60 control 62 and and then the action of control coil 52.When the engine normal running, i.e. situation as shown in Figure 2, open by throttle valve greater than for example 1000rpm for engine speed and since coil 52 do not filled can, so stick harness 50 utilizes spring 64 to be held in the position shown in the figure 1.But when engine deceleration, throttle valve 16 is closed, and TVPS Throttle Valve Position Switch and engine speed switch all are closed, and the latter keeps closing when engine speed for example keep to surpass 1000rpm, and relay 62 is filled can and and then fill energy with electromagnetic coil 52.Its result, stick harness 50 is moved by the direction along arrow 54, to allow ventilating than the lower end of passage 14.
During ventilation, a large amount of air inlet passages 14 cause considerable sinuous flow than the lower end in the zone that is denoted as X.Its result has rational lamina air flow from passage 34 to quickening outlet 42.This has the effect that any suction was lost efficacy in primary air passage 12, therefore makes fuel-air mixed gas avoid producing along passage 14.In fact, have simultaneously at this and take place than the ventilation effect of low side and at the barrier effect of outlet 18, barrier effect be because in the X zone since the air sinuous flow form stop so.
Moreover because tortuous passageway 26 and 28 events, having limited air stream can not export by idling easily.If do not have the arrangement of this kind tortuous passageway, sizable suction within the passage 12
Export 42 sucking-off gasoline-air mixtures from passage 14 via acceleration.Normal running, when coil 52 unstart still, the fuel-air mixed gas by tortuous passageway in the plug-in unit since in the plug-in unit relation of sonic flow have the advantage that improves the fuel height atomizing, so, the passage 26 at right angle and 28 promptly enough for a short time be to guarantee not
Generation is fallen in the sonic pressure ripple that is caused greater than the pressure more than 2 to 1, to cause great sinuous flow at two passages 26 and 28 handing-over parts.
Same, can notice that plug-in unit extends through idling outlet 18, outside the wall portion for primary air passage 12.Its result, producing the chance that fuel oil drips the phenomenon of cohesion on the wall of primary air passage 12 parts under idling outlet will dwindle greatly, also can guarantee the enhancement that atomizes.
The combination that an advantage of the invention is spring 30 and plug-in unit 24 can be suitable for the Carburetor of quite wide scope, because the elasticity that any pressure difference value all can utilize spring 30 between outlet 18 and opening 20 balance in addition.
Plug-in unit 32 preferably can be made the form of the dress usefulness of can reversing.This is to say, plug-in unit can have quite thick screw thread 33a at the one end, as 10/32 screw thread, then can have thinner screw thread 33b relatively at an opposite end, as 5 * 0.5mm person.In such cases, a suitable end of plug-in unit can screw in the opening according to the screw thread in the opening 20 Already in, manages 36 the other ends that then are connected to plug-in unit.In fact utilize two kinds of different screw threads, as above-mentioned two kinds, just can be suitable for most existing screw thread, as 10/32,5 * 0.75mm, 5 * 0.8mm and 5 * 0.5mm etc.
Because the position of plug-in unit in the idling outlet fixed, and just needs a kind of method of adjustment idling mixed gas of accommodation.This can utilize via pipe 36 and an adjustable little air stream is provided and accomplishes.
Another advantage that adopts lasting air stream to control the concentration of idling mixed gas is to avoid fuel oil to build up within pipe 36.Another advantage is that nut 70 can be located at a position that easy structure arrives away from Carburetor, and it is very easy adjust, and does not also need any special instrument.
Show a kind of plug-in unit 24A among Figure 1A through revising.This plug-in unit is an entity that is cut with a transverse groove 80 on the surface near outlet 18.A groove can be arranged as shown in the figure, also can have more than two.These grooves have passage 14 than the lower end and export the effect that tortuous passageway is provided between 18, also have as described above characteristic advantage among relevant Fig. 1 etc., also with same principle.
Show another modified plug-in unit 24B among Figure 1B.This plug-in unit has a tip 90, and part is charged within the opening of outlet 18.It also has the circular flange 92 of an amplification, is adjacent to most advanced and sophisticated broad one end part, to provide tortuous passage for flowing out in the air-flow of outlet 18.This plug-in unit has an integrally formed threaded end 94 again, can screw among opening 20, and in the time of adjusting idle mixture richness, plug-in unit is adjusted front and back position in opening 20, charges in the size of outlet 18 to change the tip.The advantage of annular flange 92 is that the tortuous passageway of air stream when ventilation can be provided, promptly as the expositor of Fig. 1 dependent part branch, but this kind arrangement does not have the advantage that with plug-in unit 24 be easy to the same with 24A is suitable for most of Carburetor, is not the position that is easy to be adjusted between outlet 18 and the opening 20 because arrange like this.
Some automobile has the anti-diesel oil valve of certain form, but the supply of fuel shutoff when the engine ignition switch is closed, to stop the running of engine.Therefore select as another kind, the circuit shown in Fig. 2 can be used to this anti-diesel oil valve of control.This line-transect 70 just can get along well Fig. 1 the same be connected to electromagnetic coil 52, and can be connected to the electromagnetic coil of this anti-diesel oil valve of operation.
Same and since be not all engine all by gasoline driven, but still can adopt the present invention's principle when using different fuel.For example, some engine system is driven by oil gas, that is this kind engine does not burn uses gasoline, but burns the petroleum liquid fuel of using through vaporization, for example propane.Therefore when engine deceleration or brake, can utilize the electromagnetic coil that is connected in line 70 to come interrupt delivery to give the oil gas of engine.
Diesel motor also can utilize the present invention advantage and engine deceleration or when brake not with the fuel delivery nozzle.Can utilize the existing control mechanism in the existing diesel motor to carry out like this when engine brakes or slow down, to interrupt the supply of fuel oil to stop the running of diesel motor.
In some diesel motor, use motor, electromagnetic coil or vacuum sensor interrupt the supplying fuel via nozzle, to end the running of engine, for example, utilize the in addition bypass of pressurized fuel oil.In other diesel motor, utilize a tooth bar to come the position of control rate controller, and, deliver to the material oil mass of nozzle with control the fuel oil bypass of naming a person for a particular job and pressurizeing of fuel oil in the pump circulation.When stopping engine, tooth bar is moved toward the limit of an end, and the pressure in the fuel oil promptly continues to reduce, and does not just have fuel to be sent to nozzle.
As illustrated in fig. 2, the speed of gasoline engine can utilize the calculating firing pulse to decide.Clearly this is impossible in diesel motor, the rotating speed of engine can utilize at the fans drive band of the output shaft of engine defeated, the gear that camshaft drives, or any other connection and go up the magnet of attaching one or polylith with the axle that engine rotates simultaneously, and prepare a static pick-up, the number of times that induced magnet passes through when engine crankshaft rotates, and the rotating speed of decision engine.Again the position of throttle valve can utilize with Fig. 2 in the decision of the same method.
Fig. 3 cuts off several different choice of supplying fuel when showing diesel motor brake or deceleration.
There is an engine speed sensor 300 to include to be contained in one or more magnet 301 and a magnetic Hall pick-up 302 on the engine crankshaft, when engine running, can provides with respect to the electrical pulse output of magnet by sensor.Its output signal is the firing pulse that is equivalent to gasoline engine, and speed sensor switch 50 and TVPS Throttle Valve Position Switch 60 are then similar with above-mentioned Fig. 2 person.
The output signal of being sent by speed sensitive device can be used for an existing motor in the operating engine, and electromagnetic coil or vacuum controller are with the supply of fuel shutoff when engine is prepared to end to turn round.Any so existingly all can use for the device that shuts down.And these devices are controlled to the running that stops engine when engine deceleration in one aspect.
Claims (10)
1, an internal combustion engine, its supply of fuel no matter be gasoline, petroleum gas or diesel fuel, is ended supply when engine deceleration or brake.
2, as the engine of claim 1, this engine system is by gasoline institute driver, and has an anti-diesel oil valve with fuel shutoff supply when engine ignition is closed, this engine has the device of sensing engine deceleration brake, and these devices can start described anti-diesel oil valve with fuel shutoff supply when engine deceleration or the brake.
3, as the engine of 1 of claim the, this engine system is by petroleum gas institute driver, and have a valve cutting off the supply of petroleum gas, with regard to engine and have the device of sensing engine deceleration or brake, these devices can start described valve with the fuel shutoff supply when engine deceleration or brake.
4, as the engine of 1 of claim the, this engine is a diesel motor, and has a controller that utilize to interrupt the diesel oil supply and stop diesel motor, this engine also has the device of sensing engine deceleration or brake, and these devices can start described controller with the fuel shutoff supply when engine deceleration or brake.
5, the Carburetor of the internal combustion engine of one gasoline driven, this Carburetor has an idling mixed gas passage, be connected to an idling oil gas vent that is positioned at the throttle valve downstream, with dispensable, be positioned at idling outlet upstream, be adjacent to one or more acceleration outlets of the closed position of throttle valve, a plug-in unit, match to form the passage of complications with the idling outlet, connect by being exported to the downstream of throttle valve by the idling mixed gas passage, with the device that when engine brakes or slow down, supplies idling mixed gas passage downstream ventilation, make and discharge via the tortuous passageway of plug-in unit at the ventilation sonic flow at least, and when having enough ventilating airs to enter the downstream of idling mixed gas passage, can avoid from the engine air admittance manifold via idling outlet and acceleration outlet (if having) sucking-off fuel, to guarantee that not having fuel-air mixed gas when ventilating is sucked out along this passage.
6, as the Carburetor of 5 of claims the, wherein this plug-in unit has an axial passage, is connected in more than one crosspassage, and with being connected of idling mixed gas passage than the lower end.This a series of passage forms by the air of idling outlet and a zigzag path of fuel-air mixed gas, therefore forms sonic flow.
7, as claim the 5 or 6 s' Carburetor, wherein this plug-in unit extends for the wall of air passageways outer to avoid fuel droplet to condense on this wall inwardly.
8, as each Carburetor of 5 to 7 of claims the, wherein this air-breather bag comprises one and is positioned at vent valve than distant positions with what pipe connected, this valve system utilize measure throttle valve downstream represent engine deceleration high vacuum existence and be controlled.
9, as the Carburetor of 8 of claims the, high vacuum system wherein directly records with the rotating speed of device sensing engine and throttle valve position.
10, as each the Carburetor in 5 to 9 of the claims the, wherein the series of the idling mixed gas under normal operation is with providing one can adjust and often decide air stream and adjusted by air-breather.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101645 CN85101645A (en) | 1985-04-01 | 1985-04-01 | Fuel control unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85101645 CN85101645A (en) | 1985-04-01 | 1985-04-01 | Fuel control unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85101645A true CN85101645A (en) | 1987-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85101645 Pending CN85101645A (en) | 1985-04-01 | 1985-04-01 | Fuel control unit |
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| Country | Link |
|---|---|
| CN (1) | CN85101645A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436790C (en) * | 2001-10-19 | 2008-11-26 | 雅马哈发动机株式会社 | Fuel cut controll method |
| CN102362059A (en) * | 2009-03-23 | 2012-02-22 | 丰田自动车株式会社 | Fuel injection device for internal combustion engine |
-
1985
- 1985-04-01 CN CN 85101645 patent/CN85101645A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100436790C (en) * | 2001-10-19 | 2008-11-26 | 雅马哈发动机株式会社 | Fuel cut controll method |
| CN102362059A (en) * | 2009-03-23 | 2012-02-22 | 丰田自动车株式会社 | Fuel injection device for internal combustion engine |
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| C06 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |