CN100464069C - Air-fuel ratio control valve with negative pressure sensor - Google Patents
Air-fuel ratio control valve with negative pressure sensor Download PDFInfo
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- CN100464069C CN100464069C CNB2007100517272A CN200710051727A CN100464069C CN 100464069 C CN100464069 C CN 100464069C CN B2007100517272 A CNB2007100517272 A CN B2007100517272A CN 200710051727 A CN200710051727 A CN 200710051727A CN 100464069 C CN100464069 C CN 100464069C
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- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
The invention is an air-fuel ratio control valve with negative pressure sensor, belonging to an engine gas inlet control device, where the valve body is divided into two cavities respectively connected with two gas inlets, and a negative pressure sensor is arranged in a negative pressure cavity on one side of a gas inlet; it implements integration of control valve and negative pressure sensor in the engine gas inlet pipeline; it is convenient to debug and convenient to product quality control, and improves product reliability and prolongs service life of product; the negative pressure sensor is sensitive and has high action accuracy; the valve body is equipped with microflow hole and trimmer screw, meeting the requirements of idling working condition for fine adjustment of air-fuel ratio. And it has compact structure, occupies small space and is convenient to installation and application. And it is suitable to make air-fuel ratio control on various carburetor gasoline engines.
Description
Affiliated technical field
The present invention relates to the control valve that a kind of air to suction tude carries out throttling control, also relate to the B/P EGR Back Pressure Transducer EGR that gas pressure is measured, is a kind of air fuel ratio control valve with B/P EGR Back Pressure Transducer EGR specifically.
Background technique
Petrol engine when work, need regulate and control air fuel ratio according to different situations, guaranteeing, and reduce the discharging of pollutant to the making full use of of fuel chemical energy.Petrol engine for carburetor type, adopt air fuel ratio control valve, the inlet hole of valve is communicated with air-strainer, air outlet hole is connected on the adapter of Carburetor and motor through pipeline, behind Carburetor, replenish an amount of air, can in time adjust the mixed proportion of air and fuel vapor, guarantee full combustion of fuel, to improve power character, Economy and the exhaust index of motor.B/P EGR Back Pressure Transducer EGR then is used for the negative pressure signal of detection of engine breathing process, and according to detected negative pressure signal, control system can be adjusted and control the delivery volume of motor fuel, makes its combustion efficiency and discharging remain on preferable level.When mounted, usually as notification number: CN 2709962Y, the suction port of B/P EGR Back Pressure Transducer EGR is connected with air-strainer, its negative pressure mouth then with Carburetor and cylinder between suction tude be communicated with.B/P EGR Back Pressure Transducer EGR is different separately with the air fuel ratio control valve function, and closer contact is arranged again, and the signal of B/P EGR Back Pressure Transducer EGR is an important parameter of handling the air fuel ratio control valve action.They are connected on the air inlet pipeline of motor, have not only increased installation difficulty, and it is bigger to take up room, and debugging and keep in repair cumbersomely, and fabricating cost is higher.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, provide a kind of simple in structure, volume is little, Installation and Debugging are easily with the air fuel ratio control valve of B/P EGR Back Pressure Transducer EGR.It is convenient to and to control the electronic digital control system of motor operation supporting, oil consumption and discharging in the time of can reducing engine operation effectively.
Technical solution of the present invention is: the air fuel ratio control valve of band B/P EGR Back Pressure Transducer EGR, the spool that is installed on the electric machine assembly matches with the hole in the valve body, with being separated into two chambeies that are communicated with inlet hole and air outlet hole respectively in the valve body, in the negative cavity of air outlet hole one side, be provided with B/P EGR Back Pressure Transducer EGR.
B/P EGR Back Pressure Transducer EGR of the present invention is made up of spring seat, spring, diaphragm, magnet, Hall element and lid, spring seat is provided with damping hole, damping hole is communicated with the pressure stabilizing cavity of negative cavity and B/P EGR Back Pressure Transducer EGR inside, spring is arranged between spring seat and the diaphragm, the another side of diaphragm is provided with magnet, is provided with Hall element at the inboard corresponding magnet of lid.
The present invention can also be provided with the miniflow hole that is communicated with inlet hole one side in the negative cavity of air outlet hole one side, the micrometer adjusting screw that intersects with duct, miniflow hole is installed on the valve body.
Spring of the present invention is an elastic force incremental spring.
The present invention can also be fixed on Hall element on the circuit board, signal output part on the circuit board connects lead, the other end of lead is connected with wiring base, and Hall element and circuit board are fixed on the adjusting screw, and adjusting screw is installed on the lid through adjusting nut, big nut and primary nut.
The invention has the beneficial effects as follows: 1, realized the integrated of control valve and sensor.The tonifying Qi position of this valve is convenient to go out standardized product according to the engine type Development and Production on the adapter that connects Carburetor and motor, helps with the Motronic control maps numerical control system supporting.2, debugging is convenient.In product specification, can consider the matching of sensor and control valve in the lump, in the manufacturing, the initial baseline numerical value debugging of control valve and sensor can be put in place that making between the two, matching performance reaches best.Be convenient to the quality control of product, improved reliability and working life that product uses.3, also be provided with miniflow hole and micrometer adjusting screw on the valve body, satisfied the requirement of idling operation to the meticulous adjustment of air fuel ratio.4, the sensor response sensitivity, the operation precision height, measuring range is wide, working stability is reliable, can react the changing condition of internal combustion engine load exactly.5, compact structure, it is little to take up room, easy to install.Be suitable for various types of carburetor type petrol engines are carried out detection of negative pressure and air fuel ratio control.
Description of drawings
Fig. 1 is a structural representation of the present invention
Embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments:
Among Fig. 1, back-up ring 1, valve body 2, valve body circuit board 3, rubber pad 4, electric machine assembly 5, spool 6, micrometer adjusting screw 7, wiring base 8, miniflow hole 9, B/P EGR Back Pressure Transducer EGR 10, spring seat 11, spring 12, diaphragm 13, Hall element 14, magnet 15, lid 16, damping hole 17, adjusting nut 18, adjusting screw 19, primary nut 20, circuit board 21, big nut 22, lead 23, inlet hole A1, negative cavity B, air outlet hole B1, pressure stabilizing cavity C, common pressure chamber D.
Referring to Fig. 1, the air fuel ratio control valve of band B/P EGR Back Pressure Transducer EGR, spool 6 is fitted in the front end of electric machine assembly 5 projecting shafts by drive fit, pack into the together inner chamber of the pairing valve body 2 of inlet hole A1, pack into rubber pad 4 and valve body circuit board 3, be connected with wiring base 8 on the valve body circuit board 3, the back-up ring 1 of packing into is with its axial locking.Electric machine assembly 5 can adopt stepper motor to make, and also can use linear electric motor.Receive the drive signal of controller when this control valve, electric machine assembly 5 will be made the action that forward, reverse or stop end, thereby drive spool 6 forward and back or stop vertically, thereby the flow area between the hole that changes spool 6 and cooperate with it, also just change the size of air mass flow, and then reached the requirement of control air fuel ratio.The spool 6 that is installed on the electric machine assembly 5 matches with the hole in the valve body 2, with being separated into two chambeies that are communicated with inlet hole A1 and air outlet hole B1 respectively in the valve body 2, in the negative cavity B of air outlet hole B1 one side, is provided with B/P EGR Back Pressure Transducer EGR 10.
B/P EGR Back Pressure Transducer EGR can adopt the B/P EGR Back Pressure Transducer EGR that the disclosed B/P EGR Back Pressure Transducer EGR of CN2709962Y or other can detection of engine intake negative-pressure signal.For under dynamic environment, obtaining testing signal more accurately, so that obtain the dynamic data of engine load, preferably adopt B/P EGR Back Pressure Transducer EGR 10 as shown in fig. 1, this B/P EGR Back Pressure Transducer EGR 10 by the applicant in having applied for patent to Patent Office of State Intellectual Property Office on the same day.B/P EGR Back Pressure Transducer EGR 10 is made up of spring seat 11, spring 12, diaphragm 13, magnet 15, Hall element 14 and lid 16, spring seat 11 is provided with damping hole 17, damping hole 17 is communicated with the pressure stabilizing cavity C of negative cavity B and B/P EGR Back Pressure Transducer EGR 10 inside, in pressure stabilizing cavity C, spring 12 is arranged between spring seat 11 and the diaphragm 13, the another side of diaphragm 13 is common pressure chamber D, and the diaphragm 13 of common pressure chamber D is provided with magnet 15, is provided with Hall element 14 at lid 16 inboard corresponding magnet 15.Spring 12 in the pressure stabilizing cavity C is an elastic force incremental spring.It is made up of soft spring, spring joint and hard spring, and spring joint one end connects soft spring, and the other end connects hard spring, and the soft spring the other end withstands on the spring seat 11, and the hard spring the other end withstands on the diaphragm 13.Under the effect of negative pressure, the main earlier compression soft spring of diaphragm 13, when negative pressure is increased to one regularly, soft spring is pressed onto the position, stop compression, the hard spring of diaphragm 13 recompressions is when guaranteeing that like this negative pressure is ascending, the combination of two springs all can produce certain decrement, truly negative pressure variation amount correspondence is changed into the change in displacement value of spring 12.Promptly utilize the elasticity of spring 12 the engine intake variation in pressure to be converted to the length change of spring 12, change magnetic induction intensity between magnet 15 and the Hall element 14 with this, send corresponding electrical signal by Hall element 14, thereby enlarge tonometric scope, guarantee the sensitivity and the precision of measurement, the physical dimension that also can dwindle spring 12.Guaranteeing under the cumulative condition of elastic force that spring 12 also can be variable-pitch spring or become the diameter spring.
The Hall element 14 that is arranged in the lid 16 is fixed on the circuit board 21, as Hall element 14 is bonded on the circuit board 21.Signal output part on the circuit board 21 is connected with lead 23, and lead 23 is worn from lid 16 inboard warp holes to valve body 2 the other ends and is connected with wiring base 8.Wiring base 8 has Out let, and the output line segment on lead 23 and the valve body circuit board 3 is connected on the engine controlling unit.Hall element 14 and circuit board 21 are fixed on the adjusting screw 19, and adjusting screw 19 is installed on the lid 16 through adjusting nut 18, big nut 22 and primary nut 20.On the lid 16 or the specialized designs guiding groove, one side, it can only be axially moved and can not rotate with this guiding groove that snaps in of circuit board 21.Adjusting screw 19 screws in adjusting nut 6, and adjusting nut 18 screws on lid 16, and big nut 22 screws on adjusting nut 18, and primary nut 20 screws on adjusting screw 19.When rotating adjusting nut 18, adjusting screw 19 can only drive circuit board 21 and Hall element 14 axially moves.Can change the distance of 15 of Hall element 14 and magnet by adjusting adjusting nut 18 or the position of adjusting screw 19 in lid 16.Under atmospheric pressure state, adjust the initial distance of Hall element 14 and magnet 15, can determine the reference voltage value of B/P EGR Back Pressure Transducer EGR.Big nut 22 is used for the location of adjusting nut 18, and primary nut 20 is used for the location of adjusting screw 19.Hall element 14 can pass through primary nut 20 and big nut 22 with its locking after determining with the initial distance of magnet 15.The displacement amount variation of spring 12 is converted to the variable quantity of electrical signal by Hall element 14.
In the negative cavity B of air outlet hole B1 one side, be provided with the miniflow hole 9 that is communicated with inlet hole A1 one side, the micrometer adjusting screw 7 that intersects with 9 ducts, miniflow hole is installed on the valve body 2.Hole on miniflow hole 9 and the valve body 2 be arranged in parallel, and is communicated with inlet hole A1 and air outlet hole B1, and micrometer adjusting screw 7 is installed on the valve body 2 and with miniflow aperture C1 and intersects.By adjusting the degree of depth of micrometer adjusting screw 7, can adjust the area of passage in miniflow hole 9, thereby satisfy of the requirement of different petrol engine idling operations the meticulous adjustment of air fuel ratio.Miniflow hole 9 is through to inlet hole A1 one side from negative cavity B one side on the valve body 2, and the middle part perpendicular to 9 ducts, miniflow hole on the valve body 2 has screw, and micrometer adjusting screw 7 screws in from screw, and the area of passage in miniflow hole 9 is regulated.Outer installment at micrometer adjusting screw 7 has locking nut, after micrometer adjusting screw 7 is adjusted to the right place, locking nut screwed can make micrometer adjusting screw 7 fixing.Spool 6 is provided with end cap, and end cap can correspondence cover miniflow hole 9, can also be provided with stopple in corresponding miniflow hole 9 on end cap.When the cone on the spool 6 when hole on the valve body 2 closely contacts, stopple just is tucked in the miniflow hole 9, stops air communication to cross miniflow hole 9; Behind the hole that spool 6 breaks away from the valve body 2, stopple also leaves miniflow hole 9.
Claims (3)
1. be with the air fuel ratio control valve of B/P EGR Back Pressure Transducer EGR, the spool (6) that is installed on the electric machine assembly (5) matches with the hole in the valve body (2), two chambeies that are communicated with inlet hole (A1) and air outlet hole (B1) respectively will be separated in the valve body (2), it is characterized in that: in the negative cavity (B) of air outlet hole (B1) side, be provided with B/P EGR Back Pressure Transducer EGR (10), B/P EGR Back Pressure Transducer EGR (10) is by spring seat (11), spring (12), diaphragm (13), magnet (15), Hall element (14) and lid (16) are formed, spring seat (11) is provided with damping hole (17), damping hole (17) is communicated with the pressure stabilizing cavity (C) of negative cavity (B) and B/P EGR Back Pressure Transducer EGR (10) inside, spring (12) is arranged between spring seat (11) and the diaphragm (13), the another side of diaphragm (13) is provided with magnet (15), be provided with Hall element (14) at the inboard corresponding magnet of lid (16) (15), Hall element (14) is fixed on the circuit board (21), signal output part on the circuit board (21) connects lead (23), the other end of lead (23) is connected with wiring base (8), Hall element (14) and circuit board (21) are fixed on the adjusting screw (19), and adjusting screw (19) is through adjusting nut (18), big nut (22) and primary nut (20) are installed on the lid (16).
2. the air fuel ratio control valve of band B/P EGR Back Pressure Transducer EGR according to claim 1, it is characterized in that: in the negative cavity (B) of air outlet hole (B1) side, be provided with the miniflow hole (9) that is communicated with inlet hole (A1) side, the micrometer adjusting screw (7) that intersects with duct, miniflow hole (9) is installed on the valve body (2).
3. the air fuel ratio control valve of band B/P EGR Back Pressure Transducer EGR according to claim 1 is characterized in that: spring (12) is an elastic force incremental spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100517272A CN100464069C (en) | 2007-03-26 | 2007-03-26 | Air-fuel ratio control valve with negative pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100517272A CN100464069C (en) | 2007-03-26 | 2007-03-26 | Air-fuel ratio control valve with negative pressure sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025132A CN101025132A (en) | 2007-08-29 |
| CN100464069C true CN100464069C (en) | 2009-02-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100517272A Expired - Fee Related CN100464069C (en) | 2007-03-26 | 2007-03-26 | Air-fuel ratio control valve with negative pressure sensor |
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| Country | Link |
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| CN (1) | CN100464069C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113898570B (en) * | 2021-12-08 | 2022-02-08 | 常州萨柏美格医用气体设备有限公司 | Gas flow process detection device and method, air compressor unit and detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170971A (en) * | 1976-05-21 | 1979-10-16 | Aisin Seiki Kabushiki Kaisha | Pneumatic pressure control valve assembly |
| US4385603A (en) * | 1980-07-30 | 1983-05-31 | Robert Bosch Gmbh | Apparatus for regulating the idling RPM in an internal combustion engine |
| JPH07217501A (en) * | 1994-01-31 | 1995-08-15 | Keihin Seiki Mfg Co Ltd | Air-fuel ratio control device for carburetor |
| EP0907052A2 (en) * | 1997-09-16 | 1999-04-07 | Karl Dungs GmbH & Co. | Pneumatic ratio controller |
| CN2720131Y (en) * | 2004-07-01 | 2005-08-24 | 李安林 | Motorcycle oil-way multifunction automatic switch |
| CN201031745Y (en) * | 2007-03-26 | 2008-03-05 | 应城市新世纪摩托车配件有限责任公司 | Air/fuel ratio controlling valve with negative-pressure sensor |
-
2007
- 2007-03-26 CN CNB2007100517272A patent/CN100464069C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4170971A (en) * | 1976-05-21 | 1979-10-16 | Aisin Seiki Kabushiki Kaisha | Pneumatic pressure control valve assembly |
| US4385603A (en) * | 1980-07-30 | 1983-05-31 | Robert Bosch Gmbh | Apparatus for regulating the idling RPM in an internal combustion engine |
| JPH07217501A (en) * | 1994-01-31 | 1995-08-15 | Keihin Seiki Mfg Co Ltd | Air-fuel ratio control device for carburetor |
| EP0907052A2 (en) * | 1997-09-16 | 1999-04-07 | Karl Dungs GmbH & Co. | Pneumatic ratio controller |
| CN2720131Y (en) * | 2004-07-01 | 2005-08-24 | 李安林 | Motorcycle oil-way multifunction automatic switch |
| CN201031745Y (en) * | 2007-03-26 | 2008-03-05 | 应城市新世纪摩托车配件有限责任公司 | Air/fuel ratio controlling valve with negative-pressure sensor |
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| Publication number | Publication date |
|---|---|
| CN101025132A (en) | 2007-08-29 |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090225 Termination date: 20110326 |