CN203230506U - Electric control carburetor - Google Patents
Electric control carburetor Download PDFInfo
- Publication number
- CN203230506U CN203230506U CN 201220710841 CN201220710841U CN203230506U CN 203230506 U CN203230506 U CN 203230506U CN 201220710841 CN201220710841 CN 201220710841 CN 201220710841 U CN201220710841 U CN 201220710841U CN 203230506 U CN203230506 U CN 203230506U
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- carburetor
- air
- electronic controlled
- pressure
- aditus laryngis
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- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
The utility model relates to an electric control carburetor comprising a carburetor body, a float chamber for supplying fuel oil, and an electric control valve for regulating the concentration of mixed gas. The electric control carburetor is characterized in that the carburetor body is provided with an airflow channel, the airflow channel is provided with a throat, and the electric control carburetor also comprises a pressure sensor for detecting the air pressure at the throat. The electric control carburetor is advantaged by more reliable and compact structure.
Description
Technical field
The utility model relates to Carburetor, particularly adopts motor-operated control valve to regulate the electronic controlled carburetor of mixture strength.
Background technique
For the mixture strength of accurate controlling combustion engine, need accurately to measure the air inflow of internal-combustion engine.Therefore the mode that is generally adopted is that the air inlet pipeline at internal-combustion engine increases the normally pressure stabilizing cavity of its discharge capacity several times of a volume, internal-combustion engine itself is found out it is a throttling arrangement, set up quasistatic pressure in the pressure stabilizing cavity and the relation of air inflow by staking-out work in advance.The shortcoming of this way is that the pressure in the pressure stabilizing cavity fluctuate always, and especially pressure descends apparent in viewly when the cylinder air inlet, and the pressure measurement of stable state can't obtain the pressure variation that this air inlet brings, and the variation of the air inflow that causes of this variation.Therefore, namely there is unsurmountable systematic error in the pressure of it being regarded as stable state.
Similarly, be the mixture strength of accurate controlling combustion engine, the amount of fuel that also needs accurately control to enter cylinder.Generally one of mode of Cai Yonging is to improve charge oil pressure, reduces the influence to fuel flow that ambient pressure fluctuation (suction pressure fluctuation) causes with this, and the major defect of this mode is that cost is higher, and fuel pump and oil pressure regulator need be installed; And, because the pressure of oil pressure regulator is regulated error is arranged, so systematic error exists still.
Electronic controlled carburetor is usually used in the internal-combustion engine of little discharge capacity, and installing space, reliability and cost are restricted, and therefore is difficult to adopt aforesaid method at pressure stabilizing cavity and raising charge oil pressure to have the mode of suitable difficulty place measuring pressure.As Chinese patent application number 200720051560.5 schemes of mentioning, present system has adopted position transducer to measure throttle position substantially, with this main foundation as measurement air-intake of combustion engine amount.But the shortcoming of this scheme is that the throttle position sensor cost is than higher; For the exposed use occasion of Carburetor such as motorcycle or graden machine etc., its reliability is relatively poor; And the difference owing to mechanical parts processing, installation and wearing and tearing cause makes under same throttle position output signal, actual closure enable possition difference, and the air mass flow of measurement gained is widely different when less enable possition.Be that Chinese patent application and the publication number of CN1751174A opened 2002-285865(P2002-285865A for the spy in patent publication No.) Japanese patent application in to mention situation be that air inlet information is detected the position that sensor is installed in the more close internal-combustion engine in throttle valve downstream, this shortcoming is that sensor is easy to be subjected to the damage of the internal-combustion engine high-temperature gas regurgitated during the valve overlap.
In addition, the solenoid valve of be integrated all on present electronic controlled carburetor control bypath air or fuel feeding all passes through the mode of turnable pulse width (PWM also claims dutycycle) and regulates fuel delivery, the switching frequency of control valve is fixed under this mode, changes irrelevant with engine speed.Because the control valve conducting is constantly asynchronous with aspirating stroke, the on off state of control valve is unfixed in the aspirating stroke, consequent air inlet mixture strength instability, is difficult to control; In order to overcome this situation, need to adopt the motor-operated control valve of upper frequency usually, cause the control valve cost to increase thus.Because the lower and fixed-frequency of frequency of okperation can't be used the accurate fuel feeding metering that is applicable to the higher occasion of higher working speed.
Summary of the invention
Because above-mentioned existing in prior technology defective, the purpose of this utility model is, a kind of electronic controlled carburetor is provided, and makes its structure more reliable, compact.
Another purpose of the present utility model is, mixture strength method in a kind of control electronic controlled carburetor gas-entered passageway is provided, and makes the control of its mixture strength more accurately with stable.
To achieve these goals, according to a kind of internal-combustion engine electronic controlled carburetor that the utility model proposes, comprise the Carburetor body, supply with the float chamber of fuel oil and the motor-operated control valve of adjusting mixture strength, wherein this Carburetor body is provided with air-flow path, and this air-flow path is provided with aditus laryngis; This electronic controlled carburetor also comprises the pressure transducer that detects aditus laryngis place air pressure.
The utility model also can be applied to the following technical measures to achieve further.
Aforesaid electronic controlled carburetor, it also comprises the temperature transducer that detects described aditus laryngis place air temperature.
Aforesaid electronic controlled carburetor, the point for measuring temperature of wherein said temperature transducer is given prominence in the air-flow path at this aditus laryngis place.
Aforesaid electronic controlled carburetor, wherein said pressure transducer and temperature transducer become one and are installed in the Carburetor body.
Aforesaid electronic controlled carburetor, wherein said Carburetor body is provided with fuel feeding main jet and idling oil circuit, and this float chamber is communicated with via the air-flow path of fuel feeding main jet with this Carburetor body; The switching of this motor-operated control valve control fuel feeding main jet and/or idling oil circuit.
Aforesaid electronic controlled carburetor, wherein said Carburetor body is provided with the fuel feeding main jet, and this float chamber is communicated with via the air-flow path of fuel feeding main jet with this Carburetor body; This electronic controlled carburetor also is provided with the air by-pass pipeline, and this motor-operated control valve is controlled the switching of this air by-pass pipeline.
Aforesaid electronic controlled carburetor, it also comprises control unit, receives suction pressure and temperature signal in CAP signal, the aditus laryngis place air-flow path, controls the unlatching moment and the unlatching cycle of described motor-operated control valve.
To achieve these goals, a kind of electronic controlled carburetor that proposes in addition according to the utility model is directly installed on the aditus laryngis place of Carburetor with air inlet pressure sensor and temperature transducer, improves the compactedness of Carburetor by so integrated mounting type.
In addition, according to mixture strength method in a kind of control electronic controlled carburetor gas-entered passageway that the utility model proposes, according to the unlatching of CAP control motor-operated control valve; According to the opening time length (conducting pulsewidth) of control motor-operated control valves such as the pressure at aditus laryngis place, temperature, speed of crankshaft, once control the size of fuel flow, and correspondingly realize the control to mixture strength.
The utility model compared with prior art has tangible advantage and beneficial effect.By technique scheme, electronic controlled carburetor of the present utility model and mixture strength method have following advantage at least:
One, electronic controlled carburetor of the present utility model or/and temperature transducer is directly installed on the aditus laryngis place of Carburetor, improves the compactedness of Carburetor and internal-combustion engine with air inlet pressure sensor by so integrated mounting type.
Two, electronic controlled carburetor of the present utility model, the aditus laryngis place on Carburetor is equipped with air inlet pressure sensor, and when internal-combustion engine was in outage state, what air inlet pressure sensor was measured was atmosphere environment pressure; When internal combustion engine operation, because air needs to accelerate through aditus laryngis place air-flow, its static pressure descends, and the pressure of measuring herein obtains more high-resolution flow information easily.
Three, this electricity control Carburetor is equipped with intake air temperature sensor at the aditus laryngis place of Carburetor, by the measurement of this temperature, can revise temperature to the influence of MAF.
Four, this electricity control Carburetor, the point for measuring temperature of intake air temperature sensor is given prominence to Carburetor aditus laryngis wall, is exposed in the air flow channel of electronic controlled carburetor, can directly measure the temperature of flowing gas, makes that measurement is more accurate, reacts also rapider.
Five, this electricity control Carburetor by pressure transducer and temperature transducer is integrated in advance, can further be simplified installation, reduces the requirement of sealing is installed; And because temperature transducer near pressure transducer, therefore can be done adequate compensation to the temperature drift of pressure transducer by temperature signal, further improve the precision of pressure transducer.
Description of drawings
Fig. 1 is the utility model electronic controlled carburetor first embodiment's structural representation.
Fig. 2 is that Carburetor aditus laryngis air-flow path place pressure changes schematic representation.
Fig. 3 is the utility model electronic controlled carburetor master fuel delivery orifice flow quantitative change schematic representation.
Fig. 4 is the utility model electronic controlled carburetor second embodiment's structural representation.
1,1 ': Carburetor body 2a: air inlet pressure sensor
2b: intake air temperature sensor 2c: hot-melt object
2: pressure-temperature sensor combination 3: throttle valve
4: float chamber mounting screw 5: float chamber
6: motor-operated control valve 6a: the switch entrance
7: fuel feeding main jet 8: choke valve
9: air flow inlet 10: aditus laryngis
11: flow outlet 12: the air by-pass pipeline
Embodiment
Be to reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the utility model, below in conjunction with accompanying drawing and preferred embodiment, to describing in detail according to the electronic controlled carburetor that the utility model proposes and its embodiment of controlling method, step, structure, feature and effect thereof.
Seeing also shown in Figure 1ly, is the utility model electronic controlled carburetor first embodiment's structural representation.The utility model first embodiment's electronic controlled carburetor mainly comprises: Carburetor body 1 and float chamber 5.
Above-mentioned float chamber 5 is communicated with aditus laryngis 10 places of above-mentioned Carburetor body 1 via fuel feeding main jet 7, and this float chamber 5 is used for supplying with fuel oil.Be provided with float (not indicating among the figure) and motor-operated control valve 6 in this float chamber 5, the entrance 6a of this motor-operated control valve 6 is immersed under the oily plane 5a of float chamber 5; The switching of these motor-operated control valve 6 control fuel feeding main jets 7.In the present embodiment, this float chamber 5 is to be installed on Carburetor body 1 by screw 4.
When the electronic controlled carburetor of present embodiment uses, the flow outlet 11 of Carburetor body 1 is connected with the gas-entered passageway of internal-combustion engine (scheming not shown), after fresh air enters from the electronic controlled carburetor left side, reason at aditus laryngis 10 places because of throttling produces negative pressure, pressure transducer 2a and temperature transducer 2b measure the pressure and temperature of aditus laryngis 10 place's air respectively, float chamber 5 is supplied with fuel oil via main jet 7, and fuel oil mixes formation mixed gas, IC engine supply with air.The size of throttle valve 3 control air flow rates, motor-operated control valve 6 control fuel oil supplys.The electronic controlled carburetor of present embodiment, aditus laryngis 10 place's areas are accurately control easily during fabrication, according to the pressure and temperature signal at aditus laryngis 10 places and demarcation in advance, control unit of engine can accurately obtain the air mass flow at aditus laryngis 10 places, control motor-operated control valve 6 conducting pulse-width controlled fuel deliveries simultaneously, and then can accurately control gasoline air mixture ratio.In order further to promote measuring accuracy, can repeatedly gather the pressure signal at aditus laryngis place in aspirating stroke, the conducting pulsewidth of regulating motor-operated control valve on this basis.
Preferable, the point for measuring temperature of above-mentioned temperature transducer 2b is given prominence to aditus laryngis 10 walls, is exposed to the air-flow path of electronic controlled carburetor, can directly measure the temperature of flowing gas, makes that measurement is more accurate, reacts also rapider.
Preferable, above-mentioned pressure transducer 2a and temperature transducer 2b become one, and are installed on the body of electronic controlled carburetor, can further simplify installation, reduce the requirement of sealing is installed; And because temperature transducer 2b near pressure transducer 2a, therefore can do adequate compensation to the temperature drift of pressure transducer 2a by temperature signal, further improve the precision of pressure transducer 2a.
Among other embodiments, above-mentioned pressure transducer 2a can install the position away from Carburetor body 1, and the connecting tube by hollow is incorporated into sensor 2a with the pressure at aditus laryngis 10 places.
Among other embodiments, above-mentioned float chamber 5 can be installed in the position away from Carburetor body 1, fuel oil is connected to the entrance 6a of motor-operated control valve 6 by flexible pipe from float chamber 5.
See also shown in Figure 2, be the utility model electronic controlled carburetor when each cylinder has the internal-combustion engine of independent air-flow path to use, the air pressure variations schematic representation at aditus laryngis place.Pressure in the electronic controlled carburetor air-flow path is mainly influenced by I. C. engine crankshaft corner and throttle valve opening.In the air-intake of combustion engine stroke, because piston descending suction in cylinder makes that the pressure in the whole gas-entered passageway descends, at different crank positions, descent of piston speed difference causes that pressure has obvious variation in the air-flow path; Pressure in the more big gas-entered passageway of throttle valve opening changes more greatly.ECU can judge the air inflow of internal-combustion engine according to the air pressure at aditus laryngis place, and then according to the influence of measured aditus laryngis place temperature signal correction temperature to the air quantity flow.
Seeing also shown in Figure 3ly, is the utility model electronic controlled carburetor master fuel delivery orifice flow quantitative change schematic representation.When rotating speed and throttle valve opening one regularly, solid line A is the variation through the transient fuel flow of main oil supply hole when opening fully of fuel feeding switch among Fig. 3.According to the utility model, ECU can accurately control " the conducting pulsewidth " of fuel feeding switch (motor-operated control valve 6) by the opening and closing moment of control motor-operated control valve, controls fuel delivery with this, i.e. dash area shown in the figure is realized accurate control to the concentration of mixed gas with this.
Seeing also shown in Figure 4ly, is the utility model electronic controlled carburetor second embodiment's structural representation.The utility model second embodiment's electronic controlled carburetor mainly comprises: Carburetor body 1 ' and float chamber 5.
Above-mentioned float chamber 5 is communicated with the aditus laryngis 10 of above-mentioned Carburetor body 1 via fuel feeding main jet 7, and this float chamber 5 is used for supplying with fuel oil.In the present embodiment, this float chamber 5 is to be installed on Carburetor body 1 by screw 4.
When the electronic controlled carburetor of present embodiment uses, the flow outlet 11 of Carburetor body 1 ' is connected with the gas-entered passageway of internal-combustion engine (scheming not shown), after fresh air enters from the electronic controlled carburetor left side, reason at aditus laryngis 10 places because of throttling produces negative pressure, pressure transducer 2a and temperature transducer 2b measure the pressure and temperature of aditus laryngis 10 place's air respectively, float chamber 5 is supplied with fuel oil via main jet 7, and fuel oil mixes formation mixed gas, IC engine supply with air.The electronic controlled carburetor of present embodiment, aditus laryngis 10 place's areas are accurately control easily during fabrication, according to the pressure and temperature signal at aditus laryngis 10 places and demarcation in advance, the ECU(control unit of engine) can accurately obtain the air mass flow at aditus laryngis 10 places, control the flow of motor-operated control valve 6 conducting pulse-width controlled fresh airs simultaneously, and then can accurately control gasoline air mixture ratio.
The utility model is not limited to above-described embodiment, can carry out design alteration in the scope that does not break away from its purport.For example the utility model can be applied on the Carburetor of plunger type or vacuum type, by the control to motor-operated control valve, improves the mixture strength control accuracy of former Carburetor; On the basis of above-mentioned design alteration, utilize lambda sensor to form closed loop control, further improve the control accuracy of mixture strength;
Though the utility model discloses as above with preferred embodiment, so be not in order to limit the scope that the utility model is implemented, the simple equivalent of doing according to claims of the present utility model and description changes and modification, still belongs in the scope of technical solutions of the utility model.
Claims (2)
1. an electronic controlled carburetor comprises the Carburetor body, supplies with the float chamber of fuel oil and the motor-operated control valve of adjusting mixture strength, it is characterized in that this Carburetor body is provided with air-flow path, and this air-flow path is provided with aditus laryngis; This electronic controlled carburetor also comprises the pressure transducer that detects aditus laryngis place air pressure.
2. electronic controlled carburetor as claimed in claim 1 is characterized in that it also comprises the temperature transducer that detects described aditus laryngis place air temperature.
3. electronic controlled carburetor as claimed in claim 2 is characterized in that the point for measuring temperature of wherein said temperature transducer is given prominence in the air-flow path at this aditus laryngis place.
4. electronic controlled carburetor as claimed in claim 2 is characterized in that wherein said pressure transducer and temperature transducer become one to be installed in the Carburetor body.
5. electronic controlled carburetor as claimed in claim 1 is characterized in that wherein said Carburetor body is provided with fuel feeding main jet and idling oil circuit, and this float chamber is communicated with via the air-flow path of fuel feeding main jet with this Carburetor body; The switching of this motor-operated control valve control fuel feeding main jet and/or idling oil circuit.
6. electronic controlled carburetor as claimed in claim 1 is characterized in that wherein said Carburetor body is provided with the fuel feeding main jet, and this float chamber is communicated with via the air-flow path of fuel feeding main jet with this Carburetor body; This electronic controlled carburetor also is provided with the air by-pass pipeline, and this motor-operated control valve is controlled the switching of this air by-pass pipeline.
7. as the described electronic controlled carburetor of arbitrary claim in the claim 1 to 6, it is characterized in that it also comprises control unit, receive suction pressure and temperature signal in this aditus laryngis place air-flow path, control the unlatching moment and the unlatching cycle of described motor-operated control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220710841 CN203230506U (en) | 2011-12-21 | 2012-12-20 | Electric control carburetor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110432375 | 2011-12-21 | ||
| CN201110432375.1 | 2011-12-21 | ||
| CN 201220710841 CN203230506U (en) | 2011-12-21 | 2012-12-20 | Electric control carburetor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203230506U true CN203230506U (en) | 2013-10-09 |
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ID=48634656
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105593979A Pending CN103174548A (en) | 2011-12-21 | 2012-12-20 | Electronic control carburetor and control method of concentration of mixed gas |
| CN 201220710841 Expired - Fee Related CN203230506U (en) | 2011-12-21 | 2012-12-20 | Electric control carburetor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105593979A Pending CN103174548A (en) | 2011-12-21 | 2012-12-20 | Electronic control carburetor and control method of concentration of mixed gas |
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| CN (2) | CN103174548A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174548A (en) * | 2011-12-21 | 2013-06-26 | 镇江中研电控有限公司 | Electronic control carburetor and control method of concentration of mixed gas |
| CN110388281A (en) * | 2019-05-23 | 2019-10-29 | 上海齐耀动力技术有限公司 | A kind of thermomotor fuel oil supply system and method |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1687572A (en) * | 2005-03-07 | 2005-10-26 | 深圳市乾程电子有限公司 | Universal electric controlled energy saving cleaning plant for motor vehicles |
| JP2007100560A (en) * | 2005-10-03 | 2007-04-19 | Mikuni Corp | Fuel cut mechanism for carburetor |
| CN101054933A (en) * | 2007-05-14 | 2007-10-17 | 西安交通大学 | Electronic carburetor oil-supply system |
| CN201037438Y (en) * | 2007-05-17 | 2008-03-19 | 湛江德利化油器有限公司 | Electric control carburetor |
| JP2009281472A (en) * | 2008-05-21 | 2009-12-03 | Walbro Japan Inc | Solenoid valve |
| CN201215042Y (en) * | 2008-07-10 | 2009-04-01 | 重庆新大都科技发展有限公司 | Energy-conserving emission reduction electric controls for automobile carburettor |
| CN201292892Y (en) * | 2008-12-01 | 2009-08-19 | 重庆新大都科技发展有限公司 | Electric-controlled carburetor with two auxiliary airway and solenoid valve |
| CN103174548A (en) * | 2011-12-21 | 2013-06-26 | 镇江中研电控有限公司 | Electronic control carburetor and control method of concentration of mixed gas |
-
2012
- 2012-12-20 CN CN2012105593979A patent/CN103174548A/en active Pending
- 2012-12-20 CN CN 201220710841 patent/CN203230506U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103174548A (en) * | 2011-12-21 | 2013-06-26 | 镇江中研电控有限公司 | Electronic control carburetor and control method of concentration of mixed gas |
| CN110388281A (en) * | 2019-05-23 | 2019-10-29 | 上海齐耀动力技术有限公司 | A kind of thermomotor fuel oil supply system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103174548A (en) | 2013-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20161220 |