CN104677964A - Sheet type oxygen sensor and mounting and working modes thereof - Google Patents
Sheet type oxygen sensor and mounting and working modes thereof Download PDFInfo
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- CN104677964A CN104677964A CN201310631233.7A CN201310631233A CN104677964A CN 104677964 A CN104677964 A CN 104677964A CN 201310631233 A CN201310631233 A CN 201310631233A CN 104677964 A CN104677964 A CN 104677964A
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- oxygen sensor
- chip oxygen
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- engine
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Abstract
The invention relates to a sheet type oxygen sensor and mounting and working modes thereof. The sensor comprises a panel element, a protective hood and an air inlet window, wherein the sensor is characterized in that an oxygen sensor body is mounted on an exhaust passage which is 30-300mm far from an exhaust valve of an engine; exhaust gas of the engine flows around the panel element; a ventilating window is formed in a housing of the metal protective hood; the mounting direction of the panel element is parallel to the direction of an exhaust gas flow; the sensor body is heated by the exhaust gas of the engine and works. The sheet type oxygen sensor can be applied to automobiles, motorcycles, generators and other universal gasoline engine devices. The invention aims to provide the sheet type oxygen sensor which is reasonable in arrangement, low in cost and long in service life, and the reaction performance is improved; and moreover, the invention provides the mounting and working modes of the sheet type oxygen sensor.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to engine management system, especially petrol engine mixture strength control lambda sensor.
Background technology
Lambda sensor is the key sensor realizing engine air-fuel ratio FEEDBACK CONTROL, and wherein, the serviceability of mounting means to lambda sensor of lambda sensor plays a key effect, especially on the impact of its serviceable life and work efficiency.
The induction element of lambda sensor is called oxygen sensor probe.The probe of gasoline engine potentiometric oxygen sensor is made primarily of the zirconia material containing yttrium.Zirconia is a kind of special electrolyte under the high temperature conditions, when lacking oxygen, hydrocarbon in waste gas can wait Substance Transformation be electromotive force by it, and the controller of engine can according to this electric signal adjustment engine air-fuel ratio, makes it be in or close to perfect condition.Oxygen sensor probe usually have tubulose and sheet two kinds dissimilar, the latter formed sensor be chip oxygen sensor.Chip oxygen sensor probe is formed by all pressing, burning altogether by the ceramic sheets such as multilayer zirconia (wherein containing platinum electrode).Burning altogether makes the activity of sensor be deteriorated, and maintain the temperature that normal need of work is higher, therefore, generally chip oxygen sensor needs inside to carry heating.But, the inner heating of chip oxygen sensor probe is produced by very thin platinum lines, when requiring sensor reduce axial dimension and reduce costs, it is very thin that lines are compelled to do, the consistance of such product and reliability can decline, therefore how to allow the chip oxygen sensor not carrying heating normally work, shortening light-off time (light-off time) is a problem being worth inquiring into.
(patent No.: the utility model 03240466.2) disclosing a kind of non-power pattern of fever lambda sensor be installed on gas outlet cylinder, for solving the problems such as its cost, volume and design arrangement restriction for Chinese patent " oxygen sensor for feedback control of air combustion ratio of motorcycle engine ".Sensor type disclosed in this patent is tubular oxygen sensor.Because tubular oxygen sensor does not need common burning just can form internal and external electrode, therefore can work under lower temperature environment, installation site is far from chip oxygen sensing responsive.In addition, because oxygen sensor probe outside exists protective cover, reduce the degree of thermal current and probe contacts to a certain extent, thus increase lambda sensor and reach time needed for normal operating conditions, how design protection cover is also a key issue.
Summary of the invention
The present invention is directed to the problems referred to above, object be to provide one can improve reactivity worth, connection and reasonable arrangement, cost is low, the chip oxygen sensor of long service life and reasonably installing and working method.
For achieving the above object, the present invention takes following technical scheme: i.e. a kind of chip oxygen sensor and installation thereof and working method, comprise flat-panel component, it is characterized in that: lambda sensor is installed on apart from the position of engine exhaust valve 30-300mm, can be fixed on cylinder head is vented the contrary side of chain or cylinder head exhaust duct with cylinder extension on, also can be positioned on engine exhaust conduit.Described flat-panel component utilizes engine exhaust waste gas to be heated to working temperature.
Above-mentioned; chip oxygen sensor and installation thereof and working method; comprise a protective cover; a waterproof and breathable window being positioned at end; described protective cover can be metal or pottery; its sidewall has circular port ventilation window, and described circular port ventilation window can circumferentially arrange by type, and described lambda sensor can be carried by metal shell and be screwed on engine exhaust road.
Above-mentioned chip oxygen sensor and installation thereof and working method, comprise an installation pressing plate, described chip oxygen sensor is fixed on engine exhaust road by pressing plate.
Further, above-mentioned chip oxygen sensor and installation thereof and working method, the direction in its flat-panel component perception face is relative with the direction of exhaust airstream fixing.
Above-mentioned chip oxygen sensor and installation thereof and working method; the ventilation window of the protective cover of described chip oxygen sensor can unanimously with airflow direction make to be vented and pass through flat-panel component in the mode that resistance is minimum; the ventilation window of described protective cover can be the relative square through holes in both sides, also can be multiple manholes that both sides are relative.
Further, above-mentioned chip oxygen sensor and installation thereof and working method, comprise an installation pressing plate, described chip oxygen sensor is fixed on engine exhaust road by pressing plate.
Foregoing invention thought can be further elaborated by the following drawings and specific embodiment.
Accompanying drawing explanation
Fig. 1 is the first mounting structure schematic diagram of chip oxygen sensor provided by the invention and installation and working method;
Fig. 2 is the second mounting structure schematic diagram of chip oxygen sensor provided by the invention and installation and working method;
Fig. 3 is the 3rd mounting structure schematic diagram of chip oxygen sensor provided by the invention and installation and working method;
Fig. 4 is chip oxygen sensor provided by the invention and installs and working method first example structure schematic diagram;
Fig. 5 is chip oxygen sensor provided by the invention and installs and working method second example structure schematic diagram;
Fig. 6 is chip oxygen sensor provided by the invention and installs and working method the 3rd example structure schematic diagram;
Fig. 7 is the lambda sensor structural representation of chip oxygen sensor provided by the invention and its installation and first and second embodiment of working method;
Fig. 8 is the lambda sensor structural representation of chip oxygen sensor provided by the invention and its installation and working method the 3rd embodiment.
Embodiment
As shown in Figure 1, described chip oxygen sensor 1 is installed on engine cylinder head 2 and engine exhaust chain opposite side, distance vent valve 3a about 70 millimeters, can be used for detecting oxygen content in exhaust fast, effectively.
Fig. 2 is the second mounting structure schematic diagram of chip oxygen sensor provided by the invention and installation and working method, and described chip oxygen sensor 1 is installed on apart from the position within the about 300mm of engine exhaust valve 3a.
Figure 3 shows that the 3rd mounting structure schematic diagram of chip oxygen sensor provided by the invention and installation and working method, it comprises the degassing extension road 4 be connected between an engine exhaust port 3b and gas exhaust tube flange 3c, and described lambda sensor 1 is installed on degassing extension road 4.In addition, exhaust duct 4 can select the material of perfect heat-dissipating, can protect lambda sensor 1 further.
Described, the course of work of chip oxygen sensor and installation and working method is as follows:
After engine start, along with the raising of delivery temperature, the temperature of the probe of lambda sensor 1 (as in Fig. 4 5) progressively improves.Such as, after about 1 minute of startup, the temperature of probe can reach 400 ° of more than C, and now electrode is just in running order, and light-off time (light-off time) is exactly approximately one minute.Between the work requirements of lambda sensor, general recommendations is installed on apart from the position within the about 300mm of engine air valve.If engine is in denseer duty, then lack oxygen in exhaust, the materials such as HC, under the electrolytical effect of oxygen sensing probe, form electromotive force (about 1 volt) between the electrode of electrolyte both sides, then can obtain the partially dense signal of this representative by testing circuit; If engine is in partially rare operation, then contain certain oxygen in exhaust, do not have Electromotive Difference Of Potential and exist between probe electrolyte both sides, this is one and represents partially rare signal.
If by the position of lambda sensor vent valve 3a further away from each other, then the light-off time of lambda sensor can lengthen further, even cisco unity malfunction.But, if lambda sensor is further near engine air valve 3a, then engine institute waste air does not also burn (especially large load) completely, even if engine is in equivalent air-fuel ratio operation, still containing oxygen in waste gas, oxygen sensing detection to signal be partially dense signal, this signal representative be not real air-fuel ratio.Although this false signal can not reflect the actual mixing ratio situation of engine, can be used, for the partially dense control of engine under large load condition, to reduce the thermal load of engine.Under normal circumstances, if lambda sensor is arranged on cylinder head, its signal all can distortion under large load condition, and usually cause the partially dense control of engine, the closer to air valve, partially dense is more, so suggestion is not less than 30mm.
Described in Fig. 4 be chip oxygen sensor provided by the invention and install and working method first example structure schematic diagram.Described chip oxygen sensor and installing comprises with working method: a chip oxygen sensor 1, comprises mounting plane 12, and plane 12 is with the installation pressing plate 13 installing threaded hole 14, band boss 11, and installation pressing plate 13 has through hole 8.Described chip oxygen sensor 1 comprises one with perception face 5b flat-panel component 5a not; its perception face 5b scribbles external electrode protective seam; a protective cover 7; described protective cover 7 can be metal or pottery, and its relative both sides have square ventilation window 6, metal shell 16; a signal wire 17 and a ground wire 17a; a waterproof and breathable window 18, the boss 11 installing pressing plate 13 is pressed on lambda sensor metal shell 16, and is anchored on mounting plane 12 by bolt 9.
During installation; the installation direction of flat-panel component 5a is relative with the direction of exhaust airstream fixing; square through hole 6 is consistent with airflow direction; exhaust can be made in the minimum mode of resistance by flat-panel component 5a; the thermal current of cylinder exhaust passage enters from the groove 6 of protective cover 7, and join protection cover 7 heat conductivility makes the flat-panel component 5a of lambda sensor 1 reach working temperature fast.
The structural representation of chip oxygen sensor described in the present embodiment is as shown in the 7a of Fig. 7.
Chip oxygen sensor as provided by the invention in Fig. 5 and install and working method second example structure schematic diagram shown in; the ventilation window of described chip oxygen sensor 1 protective cover 7 also can adopt relative both sides to have the mode of multiple manhole 19; during installation; manhole 19 and airflow direction one are shown and are ensured to be vented in the minimum mode of resistance by flat-panel component 5a, and heat it.
The structural representation of chip oxygen sensor described in the present embodiment is as shown in the 7b of Fig. 7.
Be as described in Figure 6 chip oxygen sensor provided by the invention and install and working method the 3rd example structure schematic diagram.Chip oxygen sensor provided by the invention and installing and working method and chip oxygen sensor provided by the invention and to install and one of the difference of working method first embodiment is: the ventilation window of protective cover 7 described in the present embodiment is the circular hole 21 of circular array.Chip oxygen sensor 1 provided by the invention and installing and working method and chip oxygen sensor provided by the invention and install and two being of difference of working method first embodiment: described in the present embodiment, the metal shell 16 of lambda sensor 1 carries screw thread 20, and coordinate with exhaust duct upper screwed hole 22, lambda sensor 1 directly can be screwed in the threaded hole on the exhaust duct between engine exhaust valve 30-300mm, be locked by flexible member 24 between lambda sensor thread termination face 20a and exhaust duct upper screwed hole plane 23.Chip oxygen sensor provided by the invention and installing and working method and chip oxygen sensor provided by the invention and install and three being of difference of working method first embodiment: the flat-panel component 5a of lambda sensor 1 can rotate to be any direction with screw thread 20 in the present embodiment.
The structural representation of chip oxygen sensor described in the present embodiment as shown in Figure 8.
The present invention can be applicable to automobile, motorcycle, generator and other all-purpose gasoline machine, all belongs to the present invention should belong to protection interest field based on other further scheme of Spirit Essence of the present invention.
Claims (7)
1. a chip oxygen sensor and installation thereof and working method, comprise flat-panel component, it is characterized in that: lambda sensor is installed on engine exhaust road, engine institute waste air can flow through around flat-panel component, the position of the about 30-300mm of lambda sensor distance engine exhaust valve.
2. chip oxygen sensor and installation thereof and working method as claimed in claim 1, is characterized in that: flat-panel component is heated by engine discharging waste gas and reaches working temperature.
3. chip oxygen sensor and installation thereof and working method as claimed in claim 2, it is characterized in that: lambda sensor is installed on the exhaust duct between engine exhaust valve and gas outlet joint flange, can be fixed on cylinder head or on the extension of cylinder head exhaust duct.
4. the chip oxygen sensor as described in claim 2 or 3 and installation thereof and working method, described chip oxygen sensor comprises a waterproof and breathable window.
5. chip oxygen sensor as claimed in claim 4 and installation thereof and working method, described chip oxygen sensor comprises a protective cover, and described protective cover sidewall is furnished with air hole.
6. chip oxygen sensor as claimed in claim 5 and installation thereof and working method, described ventilation window is circular port, and described chip oxygen sensor is carried by metal shell and is screwed on engine exhaust road.
7. chip oxygen sensor and installation thereof and working method as claimed in claim 5, it is characterized in that: comprise an installation pressing plate, described chip oxygen sensor is fixed on engine exhaust road by pressing plate, and the direction in flat-panel component perception face is relative with the direction of exhaust airstream fixing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631233.7A CN104677964A (en) | 2013-12-03 | 2013-12-03 | Sheet type oxygen sensor and mounting and working modes thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631233.7A CN104677964A (en) | 2013-12-03 | 2013-12-03 | Sheet type oxygen sensor and mounting and working modes thereof |
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| CN104677964A true CN104677964A (en) | 2015-06-03 |
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| CN201310631233.7A Pending CN104677964A (en) | 2013-12-03 | 2013-12-03 | Sheet type oxygen sensor and mounting and working modes thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329043A (en) * | 1996-06-10 | 1997-12-22 | Nissan Diesel Motor Co Ltd | Internal combustion engine equipped with oxygen sensor |
| CN2660529Y (en) * | 2003-03-13 | 2004-12-01 | 浙江飞亚电子有限公司 | Oxygen sensor for feedback control of air combustion ratio of motorcycle engine |
| CN2713146Y (en) * | 2003-07-09 | 2005-07-27 | 浙江飞亚电子有限公司 | Air fuel ratio feedback control gasoline engine |
| EP1561921A1 (en) * | 2004-02-06 | 2005-08-10 | Renault s.a.s. | Device for mounting a probe to the exhaust manifold |
| JP2006152962A (en) * | 2004-11-30 | 2006-06-15 | Honda Motor Co Ltd | Air fuel ratio control device for engine |
| CN101825029A (en) * | 2010-04-30 | 2010-09-08 | 浙江飞亚电子有限公司 | Device and method for setting air-fuel ratio of idle gasoline engine |
| CN201723292U (en) * | 2010-07-21 | 2011-01-26 | 哈尔滨艾瑞汽车排气系统有限公司 | Exhaust manifold device of engine |
-
2013
- 2013-12-03 CN CN201310631233.7A patent/CN104677964A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09329043A (en) * | 1996-06-10 | 1997-12-22 | Nissan Diesel Motor Co Ltd | Internal combustion engine equipped with oxygen sensor |
| CN2660529Y (en) * | 2003-03-13 | 2004-12-01 | 浙江飞亚电子有限公司 | Oxygen sensor for feedback control of air combustion ratio of motorcycle engine |
| CN2713146Y (en) * | 2003-07-09 | 2005-07-27 | 浙江飞亚电子有限公司 | Air fuel ratio feedback control gasoline engine |
| EP1561921A1 (en) * | 2004-02-06 | 2005-08-10 | Renault s.a.s. | Device for mounting a probe to the exhaust manifold |
| JP2006152962A (en) * | 2004-11-30 | 2006-06-15 | Honda Motor Co Ltd | Air fuel ratio control device for engine |
| CN101825029A (en) * | 2010-04-30 | 2010-09-08 | 浙江飞亚电子有限公司 | Device and method for setting air-fuel ratio of idle gasoline engine |
| CN201723292U (en) * | 2010-07-21 | 2011-01-26 | 哈尔滨艾瑞汽车排气系统有限公司 | Exhaust manifold device of engine |
Non-Patent Citations (1)
| Title |
|---|
| 包俊江: "FAI电喷系统在摩托车上的应用研究", 《中国优秀硕士学位论文全文数据库（工程科技II辑）》 * |
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Application publication date: 20150603 |