CN101158611A - Engines cylinder pressure sensor installation sealing structure - Google Patents
Engines cylinder pressure sensor installation sealing structure Download PDFInfo
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- CN101158611A CN101158611A CNA200710092986XA CN200710092986A CN101158611A CN 101158611 A CN101158611 A CN 101158611A CN A200710092986X A CNA200710092986X A CN A200710092986XA CN 200710092986 A CN200710092986 A CN 200710092986A CN 101158611 A CN101158611 A CN 101158611A
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- conduit
- sensor
- cylinder
- water channel
- cylinder pressure
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Abstract
The invention discloses an engine cylinder pressure transducer fixing sealed structure including a transducer fixing vessel and a cylinder pressure transducer. The transducer fixing vessel consists of two separated parts, wherein, the upper part of the vessel is arranged through a cylinder cover and fixed to the cylinder cover, while the lower end of the upper part is sleeved inside of the lower part of the vessel. Screw threads are processed on the external surface of the lower part of the vessel, the lower part is arranged through an upper wall of a water channel and assembly connected with the screw thread, a loop of concave sealed platform is processed around the transducer fixing hole on a lower wall of the water channel, the lower end of the lower part of the vessel touches the sealed platform and realizes sealing, the cylinder pressure transducer fixed at the lower end of the transducer fixing vessel is connected to the transducer fixing hole on the water channel lower wall in screw and stretches into a burning chamber. The invention can effectively solve problems of cooling water, lubrication oil, high pressure gas for sealed engine cylinder cover, reliability of measurement can be assured, the assembly is easy with good sealing effect, and the invention is safe, reliable and easy to a machine.
Description
Technical field
The present invention relates to technical field of engines, the cylinder that is specifically related to engine is pressed detection technique.
Background technology
The in-cylinder combustion explosion pressure of engine (pressing hereinafter to be referred as cylinder) data are important test datas very in the burning development experiments.Fields such as the thermodynamic analysis in the burning exploitation, pinking are differentiated, P-V figure obtains all are based on cylinder and press data and obtain, and therefore, cylinder is pressed the correctness of data, is directly connected to the authenticity of test findings.It is to be obtained by sensor that the cylinder of engine is pressed, just the test engine cylinder is pressed used sensor at present, on the whole, be divided into two types, a kind of is to adopt spark plug formula cylinder pressure sensor, directly the induction crystal of sensor is fixed in the adaptive cover of spark plug, the same function that has igniting concurrently of the adaptive cover of spark plug with the product spark plug, directly, spark plug formula sensor is installed, is reached the purpose that the test cylinder is pressed by means of spark plug mounting hole.But the sensor of the type only is suitable for spark-ignition engine, and dissimilar spark-ignition engine, spark plug has different calorific values, and select the sensor of the type for use, variant on meeting and the product spark-plug heat value, can not fully reflect real igniting situation, moreover for long test of construction cycle, often the adaptive cover at test later stage sensor causes that igniting is insufficient, and engine catches fire easily; Aflame heat is transmitted on the spark plug, causes the increase of sensor thermal load, the thermal drift when causing test easily.The sensor of another type is a boring formula sensor, pass through processing mounting holes, on cylinder cap, the sensor of the type does not need the spark plug more reengined, can reflect the igniting situation really transducer arrangements, be suitable for various engine testing, and the not restriction of tested person cycle length has overcome the shortcoming of spark plug formula sensor, the not restriction of tested person cycle length, in the technical field of research and development, the sensor of the type is desirable selection.
The installation of existing boring formula cylinder pressure sensor, the method for employing are from cylinder cap boring, and sensor is deep into the firing chamber, press data thereby test out cylinder.Yet run into following problem in placement sensor: cylinder cap is a die cavity body, will pass water channel after the boring, enters the firing chamber of cylinder cap then, and this just relates to liquid coolant, high-pressure gas, the lubricated wet goods problem of how sealing; Moreover the cylinder cap material is generally to be aluminium alloy, and its expansion coefficient is big, and the in-cylinder combustion explosion pressure impacts greatly during work to it, how to guarantee the difficult problem of cylinder cap reliability after the processing.
Traditional boring formula cylinder pressure sensor hermetically-sealed construction is referring to Fig. 1, and it is to adopt a sensor conduit 11 to be installed in engine cylinder to cover sealed high pressure combustion gas, liquid coolant and lubricating oil.Adopt the sealing of perfect thread between sensor conduit 11 and the firing chamber 15, sensor conduit 11 and cylinder cap water channel 14 adopt rubber seal 12 sealings; Sensor conduit 11 and engine cylinder cover 13 adopt also rubber seal 12 sealings, and cylinder pressure sensor 16 is installed in the head of sensor conduit 11.
Adopt the shortcoming of this structure to be:
(1) reduced the reliability of cylinder cap.Because the head at conduit has adopted perfect thread and combustion chamber sealing, therefore the mounting hole size of processing on the firing chamber is bigger, thereby has influenced the reliability of cylinder cap.
(2) increased test error.Because the firing chamber is curved-surface structure, process bigger mounting hole after, changed the volume of firing chamber, thereby increased test error.
(3) complex process, machine add difficulty increases.Conduit and cylinder cap water channel adopt the sealing rubber ring sealing, require both the fit dimension strictnesses of machine added-time, have increased difficulty; Moreover the pressure of liquid coolant in the water channel, add the upper cylinder cover after expansion that is heated, cause water string in the cylinder cap water channel easily to the lubricating oil the inside, thereby reduced reliability.
Summary of the invention
The problem of difficult sealing has designed a kind of engines cylinder pressure sensor installation sealing structure when the objective of the invention is at the installation of boring formula cylinder pressure sensor, to guarantee the accuracy of test data, improves the reliability of processing the rear engine cylinder cap.
Technical scheme of the present invention is as follows:
Engines cylinder pressure sensor installation sealing structure, it comprises that passing engine cylinder cover, water channel installs conduit and be installed on the cylinder pressure sensor that sensor is installed catheter head until the sensor of firing chamber.Described sensor installation conduit is made up of split type two parts up and down, and the cylinder cover is passed on conduit top, is fixed on the cylinder cover, is convenient to the dismounting of cylinder cover, carries out maintaining in the process of the test.The lower end on conduit top is enclosed within the conduit lower part.The external process screw thread of conduit lower part passes the water channel upper wall, is connected with its screw fit, is used to seal water channel.Around the sensor mounting hole, be processed with the sealing platform of a circle indent on the water channel lower wall, the lower end of conduit lower part and sealing contact with platform realize sealing, the cylinder pressure sensor that is installed on sensor installation catheter head is threaded with the sensor mounting hole of water channel lower wall, put in the firing chamber, sealing liquid coolant, high-pressure gas.The cable of cylinder pressure sensor is drawn out to the cylinder cap outside from conduit, reach the requirement of sensor installation.Between conduit top and cylinder cover, and seal by O-ring seal between conduit top and the conduit lower part, thereby reached the purpose that seals liquid coolant, high-pressure gas, lubricating oil.
The present invention efficiently solves the problem of canned motor cylinder head cooling water, lubricating oil, high-pressure gas, has guaranteed the reliability of test, and assembling is simple, good airproof performance, and safe and reliable, machine adds easy realization.
Description of drawings
Fig. 1 is the sealed structural representation of existing cylinder pressure sensor;
Fig. 2, structural drawing of the present invention.
Embodiment
The present invention is further described below in conjunction with accompanying drawing.
Referring to Fig. 2, the installation sealing structure of this cylinder pressure sensor comprises that passing engine cylinder cover 24, cylinder cap water channel 25 installs conduit until the sensor of firing chamber 26, this sensor is installed conduit and is made up of split type two parts up and down, cylinder cover 24 is passed on conduit top 22, be fixed on the cylinder cover 24, and by rubber seal 23 sealings, the lower end on conduit top 22 is enclosed within the conduit lower part 1 between the cylinder cover 24, between the two also by rubber seal 23 sealings.The external process screw thread of conduit lower part 21, pass water channel upper wall 251, be connected with its screw fit, around sensor mounting hole 28, be processed with the sealing platform of a circle indent on the water channel lower wall 252, the lower end of conduit lower part 21 and sealing contact with platform realize sealing, the cylinder pressure sensor 27 that is installed on sensor installation catheter head is threaded with the sensor mounting hole 28 of water channel lower wall 252, puts in firing chamber 26, and the cable of cylinder pressure sensor 27 is drawn out to the cylinder cap outside from conduit.
Claims (1)
1. engines cylinder pressure sensor installation sealing structure, it comprise pass engine cylinder cover, water channel is installed conduit and is installed on the cylinder pressure sensor that sensor is installed the conduit lower end until the sensor of firing chamber; It is characterized in that: described sensor installation conduit is made up of split type two parts up and down, and the cylinder cover is passed on conduit top, is fixed on the cylinder cover, and the lower end is enclosed within the conduit lower part; The external process screw thread of conduit lower part, pass the water channel upper wall, be connected with its screw fit, around the sensor mounting hole, be processed with the sealing platform of a circle indent on the water channel lower wall, the lower end of conduit lower part and sealing contact with platform realize sealing, the cylinder pressure sensor that is installed on sensor installation conduit lower end is threaded with the sensor mounting hole of water channel lower wall, puts in the firing chamber, and the cable of cylinder pressure sensor is drawn out to the cylinder cap outside from conduit; Between conduit top and cylinder cover, and seal by O-ring seal between conduit top and the conduit lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710092986XA CN100520332C (en) | 2007-11-15 | 2007-11-15 | Engines cylinder pressure sensor installation sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200710092986XA CN100520332C (en) | 2007-11-15 | 2007-11-15 | Engines cylinder pressure sensor installation sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101158611A true CN101158611A (en) | 2008-04-09 |
| CN100520332C CN100520332C (en) | 2009-07-29 |
Family
ID=39306772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB200710092986XA Expired - Fee Related CN100520332C (en) | 2007-11-15 | 2007-11-15 | Engines cylinder pressure sensor installation sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100520332C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106197840A (en) * | 2016-06-29 | 2016-12-07 | 中国北方发动机研究所(天津) | The cylinder pressure instrument connection structure of high-power diesel engine cylinder head |
| CN106679980A (en) * | 2015-11-11 | 2017-05-17 | 北京汽车动力总成有限公司 | Cylinder hole plugging device used for frictional work testing |
| CN107907268A (en) * | 2017-12-28 | 2018-04-13 | 东风商用车有限公司 | A kind of sensor fixing structure |
| CN107956589A (en) * | 2017-12-28 | 2018-04-24 | 潍柴动力股份有限公司 | Engine cylinder cap and engine |
| CN108252817A (en) * | 2017-12-28 | 2018-07-06 | 潍柴动力股份有限公司 | Electrically connect structure, electrically connect method and harness built in engine |
| CN111664020A (en) * | 2020-05-14 | 2020-09-15 | 东风汽车集团有限公司 | Cylinder cover with cylinder pressure sensor sleeve and mounting method thereof |
-
2007
- 2007-11-15 CN CNB200710092986XA patent/CN100520332C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106679980A (en) * | 2015-11-11 | 2017-05-17 | 北京汽车动力总成有限公司 | Cylinder hole plugging device used for frictional work testing |
| CN106197840A (en) * | 2016-06-29 | 2016-12-07 | 中国北方发动机研究所(天津) | The cylinder pressure instrument connection structure of high-power diesel engine cylinder head |
| CN107907268A (en) * | 2017-12-28 | 2018-04-13 | 东风商用车有限公司 | A kind of sensor fixing structure |
| CN107956589A (en) * | 2017-12-28 | 2018-04-24 | 潍柴动力股份有限公司 | Engine cylinder cap and engine |
| CN108252817A (en) * | 2017-12-28 | 2018-07-06 | 潍柴动力股份有限公司 | Electrically connect structure, electrically connect method and harness built in engine |
| CN107907268B (en) * | 2017-12-28 | 2024-04-02 | 东风商用车有限公司 | Sensor mounting structure |
| CN111664020A (en) * | 2020-05-14 | 2020-09-15 | 东风汽车集团有限公司 | Cylinder cover with cylinder pressure sensor sleeve and mounting method thereof |
| CN111664020B (en) * | 2020-05-14 | 2021-08-31 | 东风汽车集团有限公司 | Cylinder cover with cylinder pressure sensor sleeve and mounting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100520332C (en) | 2009-07-29 |
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Granted publication date: 20090729 Termination date: 20201115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |