CN105449528A - Automatic continuous sampling spark plug and sampling system for combustion product in engine cylinder - Google Patents
Automatic continuous sampling spark plug and sampling system for combustion product in engine cylinder Download PDFInfo
- Publication number
- CN105449528A CN105449528A CN201510962525.8A CN201510962525A CN105449528A CN 105449528 A CN105449528 A CN 105449528A CN 201510962525 A CN201510962525 A CN 201510962525A CN 105449528 A CN105449528 A CN 105449528A
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- Prior art keywords
- sampling
- combustion product
- spark plug
- branch road
- dilution
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
- H01T13/00—Sparking plugs
- H01T13/40—Sparking plugs structurally combined with other devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2252—Sampling from a flowing stream of gas in a vehicle exhaust
- G01N2001/2255—Sampling from a flowing stream of gas in a vehicle exhaust with dilution of the sample
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a technology for preparing a sample for a test, further relates to an automatic continuous sampling spark plug and sampling system for a combustion product in an engine cylinder. The automatic continuous sampling system for the combustion product in the engine cylinder comprises a sampling spark plug 1, a sampling branch, a nitrogen diluting branch, a collection branch, a collection device 4, a sampling electromagnetic valve 3, a diluting electromagnetic valve 5, a diluting flow meter 6, a sampling flow meter 7 and an electronic control unit 8, wherein the sampling branch is connected with the sampling spark plug 1; the nitrogen diluting branch is used for carrying out dilution on the combustion product in the sampling branch; the collection branch and the collection device 4 are used for collecting the diluted combustion product; the sampling electromagnetic valve 3 is located on the sampling branch; the diluting electromagnetic valve 5 and the diluting flow meter 6 are located on the diluting branch; and the sampling flow meter 7 is located on the collection branch. The sampling system provided by the invention is communicated with an air cylinder through the spark plug, and is simple in installation technology and high in universality.
Description
Technical field:
The present invention relates to a kind of technology preparing the sample of test, relate to a kind of engine cylinder combustion product automatic continuous sampling spark plug and sampler further.
Background technology:
Automobile engine fire emission is the important component part in air environmental pollution source, at present, in order to fundamentally solve the environmental problem that this becomes increasingly conspicuous, increasing engine technology researcher starts the importance recognizing the mechanism of production of pernicious gas and the particle produce in the course of the work engine and the basic research work of emission control technology, for this reason must by obtaining the sampler of in-cylinder combustion product or combustion intermediate product in the particular moment of engine cylinder combustion process, and existing sampler is connected with engine exhaust road mostly, only can obtain the final emission product after burning completely in engine cylinder, researcher cannot obtain and study the material change that in-cylinder combustion process occurs, and disclose fast point sampling system of internal cylinder of I. C. engine as patent documentation CN1834609A, though the product in engine combustion process can be gathered at any one time, but its sampling need by special sample valve, sample valve is installed by the installing hole on cylinder, not only mounting process is complicated, versatility is not strong, and bore at cylinder the sealing that installing hole easily destroys cylinder, affect function of the engine.
Summary of the invention:
Technical problem to be solved by this invention overcomes problems of the prior art, provides a kind of and can gather sampling spark plug and the sampler of the combustion product of particular moment in engine cylinder combustion process by Automatic continuous.
Technical scheme of the present invention is as follows:
A kind of engine cylinder combustion product automatic continuous sampling spark plug, comprising: the binding post insulation shell 11 of metal shell 12, the lateral electrode 14 being arranged at side, metal shell lower end, central electrode 15, parcel central electrode, the installation thread segment 13 be connected with cylinder body; The center line of described central electrode and binding post insulation shell is biased relative to the center line installing thread segment; And also comprise: be positioned at biased vacant place, the sampling through hole 16 of the centerline parallel of center line and installation thread segment; Be embedded in the probe tube 2 in sampling through hole; Described probe tube hollow.
Preferred version as sampling spark plug: have one section in described sampling through hole for screwed hole 162, corresponding has one section for threaded rod 22 on probe tube, and the two coordinates.
Further preferred version as sampling spark plug: the sealing inner conical surface 163 in sampling through hole at screwed hole and installation screw thread between the end face in cylinder, corresponding samples the sealing male cone (strobilus masculinus) 24 between entrance at threaded rod and probe tube on probe tube, and sealing inner conical surface realizes sealing by threaded rod and screwing of screwed hole with sealing male cone (strobilus masculinus).
The part preferred parameter of sampling spark plug: the interior diameter of described sampling through hole is 4 millimeters, and the interior diameter of described probe tube is 1 ± 0.005 millimeter, and the axial length of described screwed hole and threaded rod is more than or equal to 15 millimeters.
A kind of engine cylinder combustion product automatic continuous sampling system adopting above-mentioned sampling spark plug to realize, also comprises:
The sampling slip be connected with spark plug, the nitrogen dilution branch road that the combustion product in sampling slip is diluted, for collecting collection branch road, the gathering-device 4 of dilute combustion product, described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device.
As the preferred version of sampler, also comprise: the sampling slip be connected with spark plug; To the nitrogen dilution branch road that the combustion product in sampling slip dilutes; For collecting the collection branch road of dilute combustion product; Gathering-device 4; Be positioned at the sampling electromagnetically operated valve 3 on sampling slip; Be positioned at dilution electromagnetically operated valve 5, the dilution flow meter 6 of the series connection on dilution branch road; Be positioned at the sample flow meter 7 collected on branch road; ECU (Electrical Control Unit) 8; Described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device; Described sampling electromagnetically operated valve, dilution electromagnetically operated valve are controlled by ECU (Electrical Control Unit) 8; Input connecting engine cam-position sensor and the crankshaft position sensor respectively of described ECU (Electrical Control Unit).
Compared with prior art, of the present invention have following technique effect:
(1) the bias structure form of this sampling spark plug, making on the narrow and small spark plug of area, arrange sampling through hole becomes possibility; Avoid probe tube installation, dismounting and the interference problem in using.
(2) in the preferred version of sampling spark plug, sampling through hole adopts the conical surface and thread seal, ensures that former engine compression ratio remains unchanged.
(3) in the preferred version of sampling spark plug, sampling through-hole diameter is 1mm, ensures that the Combustion Cycle Variability of engine in sampling process remains on 2%-3%.
(4) sampler is communicated with cylinder by spark plug, and mounting process is simple, highly versatile.
(5) in the preferred version of sampler, sampling slip adopts high frequency response electromagnetically operated valve, ECU (Electrical Control Unit) triggers electromagnetically operated valve according to bent axle and camshaft signal and opens and close, and can realize the engine cylinder combustion material automatic continuous sampling in set time window.
Accompanying drawing illustrates:
Fig. 1 is the part section structural representation of sampling spark plug; In figure, 11 represent binding post insulation shell, and 12 represent metal shell, and thread segment is installed in 13 representatives, and 14 represent lateral electrode, and 15 represent central electrode, 16 representative sampling through holes, and 161 represent unthreaded hole, and 162 represent screwed hole, 163 representative sealing inner conical surfaces.
Fig. 2 is the partial enlarged drawing at A place in Fig. 1.
Fig. 3 is the structural representation of probe tube; 21 represent polished rod, and 22 represent threaded rod, and 23 represent probe tube through hole, and 24 representative sealing male cone (strobilus masculinus)s, 25 represent external part.
Fig. 4 is the structural representation of sampler; 1 representative sampling spark plug, 2 represent probe tube, 3 representative sampling electromagnetically operated valves, and 4 represent gathering-device, and 5 representative dilution electromagnetically operated valves, 6 represent dilution flow meter, and 7 represent sample flow meter, and 8 represent ECU (Electrical Control Unit).
Embodiment:
Embodiment:
In order to make those skilled in the art understand technical scheme of the present invention better, below in conjunction with drawings and Examples, the present invention is described in further detail.
Engine cylinder combustion product automatic continuous sampling system, comprise: sampling spark plug 1, with sample the sampling slip that spark plug 1 is connected, the nitrogen dilution branch road that the combustion product in sampling slip is diluted, for collecting collection branch road, the gathering-device 4 of dilute combustion product, described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device; Be positioned at the sampling electromagnetically operated valve 3 on sampling slip; Be positioned at dilution electromagnetically operated valve 5, the dilution flow meter 6 of the series connection on dilution branch road; Be positioned at the sample flow meter 7 collected on branch road; ECU (Electrical Control Unit) 8;
Described sampling electromagnetically operated valve, dilution electromagnetically operated valve are controlled by ECU (Electrical Control Unit) 8; Input connecting engine cam-position sensor and the crankshaft position sensor respectively of described ECU (Electrical Control Unit).
Sampling spark plug 1 comprises: binding post insulation shell 11, the installation thread segment 13 that is connected with cylinder body of metal shell 12, the lateral electrode 14 being arranged at side, metal shell lower end, central electrode 15, parcel central electrode, and the center line of described central electrode and binding post insulation shell is biased relative to the center line of installation thread segment; And also comprise: be positioned at biased vacant place, the sampling through hole 16 of the centerline parallel of center line and installation thread segment; Be embedded in the probe tube 2 in sampling through hole.
Have one section in described sampling through hole for screwed hole 162, corresponding has one section for threaded rod 22 on probe tube, and the two coordinates.
Sealing inner conical surface 163 in sampling through hole at screwed hole and installation screw thread between the end face in cylinder, corresponding samples the male cone (strobilus masculinus) 24 between entrance at threaded rod and probe tube on probe tube, and inner conical surface and male cone (strobilus masculinus) realize sealing by threaded rod and screwing of screwed hole.
During installation, probe tube 2 inserts in sampling through hole 16, on it, polished rod 21 matches with sampling through hole 16, and end sampling through hole 16 being positioned at installation thread segment 13 one end is the screwed hole 162 for being threaded with probe tube 2, and at the bottom of screwed hole 162 hole, be provided with the sealing inner conical surface 163 adapted with the sealing male cone (strobilus masculinus) 24 on probe tube 2 outer tube wall, by screw thread and conical surface seal, prevent the high pressure in cylinder, high-temp combustion material from sintering sampling spark plug 1 or the uncontrollable effusion of HTHP combustion product, ensure the sealing of cylinder; In order to ensure the sampling structural strength of the spark plug 1 and rigidity of probe tube 2, the aperture of sampling through hole 23 is Φ 4mm, and meanwhile, the reach on screwed hole 162 and probe tube 2 is all not less than 15mm; Probe tube 2 aperture is Φ 1 ± 0.005mm, and ensureing does not affect probe tube 2 intensity, and in sampling process, the cyclical variations of engine remain on 2%-3% simultaneously.
During work, technical staff presets the start-up time of sampling electromagnetically operated valve 3 by ECU (Electrical Control Unit) 8 and opens duration, ECU (Electrical Control Unit) 8 is according to crankshaft-position signal and camshaft-position signal determination engine cylinder combustion moment, transmit control signal and control the opening and closing of sampling electromagnetically operated valve 3 in each duty cycle, realize automatic continuous sampling; After sampling electromagnetically operated valve 3 is opened, in-cylinder combustion product is under in-cylinder combustion pressure drives, discharged by sampling slip, after the nitrogen dilution and cooling of dilution branch road, collected by collection branch road, technical staff according to the numerical value of dilution flow meter 6 and sample flow meter 7, can obtain the cumulative volume of the in-cylinder combustion product in preset time period.
For the ease of gathering the combustion product of different spatial in cylinder, one end of probe tube 2 is also provided with an external part 25, after probe tube 2 and sampling spark plug 1 threaded engagement, this external part 25 is stretched out to stretch in cylinder by sampling spark plug 1 lower end, certainly, the length of cylinder is stretched in this external part 25 lower end, should ensure that its end does not interfere with piston top.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. an engine cylinder combustion product automatic continuous sampling spark plug, comprise: binding post insulation shell (11), the installation thread segment (13) that is connected with cylinder body of metal shell (12), the lateral electrode (14) being arranged at side, metal shell lower end, central electrode (15), parcel central electrode, is characterized in that:
The center line of described central electrode and binding post insulation shell is biased relative to the center line installing thread segment; And also comprise:
Be positioned at biased vacant place, the sampling through hole (16) of the centerline parallel of center line and installation thread segment; Be embedded in the probe tube (2) in sampling through hole; Described probe tube hollow.
2. a kind of engine cylinder combustion product automatic continuous sampling spark plug according to claim 1, it is characterized in that: have one section in described sampling through hole for screwed hole (162), corresponding has one section for threaded rod (22) on probe tube, and the two coordinates.
3. a kind of engine cylinder combustion product automatic continuous sampling spark plug according to claim 2, it is characterized in that: the sealing inner conical surface (163) in sampling through hole at screwed hole and installation screw thread between the end face in cylinder, corresponding samples the male cone (strobilus masculinus) (24) between entrance at threaded rod and probe tube on probe tube, and inner conical surface and male cone (strobilus masculinus) realize sealing by threaded rod and screwing of screwed hole.
4. a kind of engine cylinder combustion product automatic continuous sampling spark plug according to claim 3, is characterized in that:
The interior diameter of described sampling through hole is 4 millimeters, and the interior diameter of described probe tube is 1 ± 0.005 millimeter, and the axial length of described screwed hole and threaded rod is more than or equal to 15 millimeters.
5. adopt a kind of engine cylinder combustion product automatic continuous sampling system sampling spark plug realization described in claim 1, it is characterized in that, also comprise:
The sampling slip be connected with spark plug, the nitrogen dilution branch road that the combustion product in sampling slip is diluted, for collecting collection branch road, the gathering-device (4) of dilute combustion product, described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device.
6. a kind of engine cylinder combustion product automatic continuous sampling system according to claim 5, is characterized in that, also comprise:
Be positioned at the sampling electromagnetically operated valve (3) on sampling slip;
Be positioned at dilution electromagnetically operated valve (5), the dilution flow meter (6) of the series connection on dilution branch road;
Be positioned at the sample flow meter (7) collected on branch road;
ECU (Electrical Control Unit) (8); Described sampling electromagnetically operated valve, dilution electromagnetically operated valve are controlled by ECU (Electrical Control Unit) (8).
7. a kind of engine cylinder combustion product automatic continuous sampling system according to claim 6, is characterized in that, input connecting engine cam-position sensor and the crankshaft position sensor respectively of described ECU (Electrical Control Unit).
8. adopt a kind of engine cylinder combustion product automatic continuous sampling system sampling spark plug realization described in claim 2, it is characterized in that, also comprise:
The sampling slip be connected with spark plug, the nitrogen dilution branch road that the combustion product in sampling slip is diluted, for collecting collection branch road, the gathering-device (4) of dilute combustion product, described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device.
9. adopt a kind of engine cylinder combustion product automatic continuous sampling system sampling spark plug realization described in claim 3, it is characterized in that, also comprise:
The sampling slip be connected with spark plug, the nitrogen dilution branch road that the combustion product in sampling slip is diluted, for collecting collection branch road, the gathering-device (4) of dilute combustion product, described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device.
10. adopt a kind of engine cylinder combustion product automatic continuous sampling system sampling spark plug realization described in claim 4, it is characterized in that, also comprise:
The sampling slip be connected with spark plug; To the nitrogen dilution branch road that the combustion product in sampling slip dilutes; For collecting the collection branch road of dilute combustion product; Gathering-device (4); Be positioned at the sampling electromagnetically operated valve (3) on sampling slip; Be positioned at dilution electromagnetically operated valve (5), the dilution flow meter (6) of the series connection on dilution branch road; Be positioned at the sample flow meter (7) collected on branch road; ECU (Electrical Control Unit) (8);
Described sampling slip enters collection branch road after being connected with described nitrogen dilution branch circuit parallel connection, finally enters gathering-device;
Described sampling electromagnetically operated valve, dilution electromagnetically operated valve are controlled by ECU (Electrical Control Unit) (8);
Input connecting engine cam-position sensor and the crankshaft position sensor respectively of described ECU (Electrical Control Unit).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962525.8A CN105449528A (en) | 2015-12-17 | 2015-12-17 | Automatic continuous sampling spark plug and sampling system for combustion product in engine cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510962525.8A CN105449528A (en) | 2015-12-17 | 2015-12-17 | Automatic continuous sampling spark plug and sampling system for combustion product in engine cylinder |
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| CN105449528A true CN105449528A (en) | 2016-03-30 |
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| CN201510962525.8A Pending CN105449528A (en) | 2015-12-17 | 2015-12-17 | Automatic continuous sampling spark plug and sampling system for combustion product in engine cylinder |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973848A (en) * | 1974-12-19 | 1976-08-10 | United Technologies Corporation | Automatic gas analysis and purging system |
| JPS544903U (en) * | 1977-06-13 | 1979-01-13 | ||
| US20040112328A1 (en) * | 2001-12-06 | 2004-06-17 | Werner Herden | Combined fuel injection valve/ignition plug |
| CN1834609A (en) * | 2006-04-18 | 2006-09-20 | 天津大学 | Fast point sampling system of internal cylinder of I.C. engine |
| CN101435827A (en) * | 2008-11-11 | 2009-05-20 | 天津世纪动力科技发展有限公司 | Exhaust pollutants measuring apparatus of heavy type diesel vehicle |
| CN205231458U (en) * | 2015-12-17 | 2016-05-11 | 天津大学 | Automatic continuous sampling spark plug of combustion product and sampling system in engine cylinder |
-
2015
- 2015-12-17 CN CN201510962525.8A patent/CN105449528A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3973848A (en) * | 1974-12-19 | 1976-08-10 | United Technologies Corporation | Automatic gas analysis and purging system |
| JPS544903U (en) * | 1977-06-13 | 1979-01-13 | ||
| US20040112328A1 (en) * | 2001-12-06 | 2004-06-17 | Werner Herden | Combined fuel injection valve/ignition plug |
| CN1834609A (en) * | 2006-04-18 | 2006-09-20 | 天津大学 | Fast point sampling system of internal cylinder of I.C. engine |
| CN101435827A (en) * | 2008-11-11 | 2009-05-20 | 天津世纪动力科技发展有限公司 | Exhaust pollutants measuring apparatus of heavy type diesel vehicle |
| CN205231458U (en) * | 2015-12-17 | 2016-05-11 | 天津大学 | Automatic continuous sampling spark plug of combustion product and sampling system in engine cylinder |
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Application publication date: 20160330 |