CN105334059A - Temperature field experimental method for engine cylinder head - Google Patents
Temperature field experimental method for engine cylinder head Download PDFInfo
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- CN105334059A CN105334059A CN201510676943.0A CN201510676943A CN105334059A CN 105334059 A CN105334059 A CN 105334059A CN 201510676943 A CN201510676943 A CN 201510676943A CN 105334059 A CN105334059 A CN 105334059A
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- temperature
- engine
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- temperature field
- field experimental
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention provides a temperature field experimental method for an engine cylinder head, and relates to a temperature field experimental method. The temperature field experimental method is used for solving the problem that the prior art cannot determine whether the eccentric wear fault of an engine valve is caused by excessive local temperature of an engine cylinder head. The temperature field experimental method comprises: selecting a plurality of test points on the cylinder head, wherein the positions of the test points includes a cylinder head high temperature point, a cylinder head low temperature point and a valve seat high temperature point; processing mounting holes at the test points, and installing a temperature sensor; installing the cylinder head with the temperature sensor on the cylinder body; installing the assembled engine on an experiment table rack; operating the engine to detect three leaking and performance; and according to the working condition, performing the test and data acquisition after guaranteeing that the state of the engine is normal. The temperature field experimental method for an engine cylinder head can provide powerful test data for the design of the engine cylinder head and the channel, and can preferably serve the development and accelerate the research and development process.
Description
Technical field
The present invention relates to a kind of temperature field test method, be specifically related to engine cylinder cover temperature field test method, belong to engine temperature field technology field.
Background technology
In view of engine carries in car load or engine rig test, there is valve partial friction, whether cause because cylinder cap local temperature is too high for analyzing this fault, because which form engine cylinder cover temperature field measurement test method, thus carry out cylinder cap temperature field measurement, be beneficial to analyze cylinder cap local overheating part, provide according to for improving cylinder cap design and malfunction elimination direction is provided, also can accumulate the empirical data in engine cylinder cover temperature field simultaneously.In present automobile industry, large multipair cylinder cap temperature survey serviceability temperature paster cylinder lid surface, assesses cylinder cap internal temperature by recording result, and deviation is comparatively large, directly can not show internal temperature.This method of testing distance expects that measuring surface is the most close, and error is little, can directly measure cylinder cap internal temperature.
Summary of the invention
The object of the invention is cannot judge to solve prior art the problem whether engine valve partial friction causes because engine cylinder cover local temperature is too high.
Technical scheme of the present invention is: engine cylinder cover temperature field experimental technique, and cylinder cap is selected some test points, and cylinder cap high temperature dot, the low warm spot of cylinder cap and valve seat high temperature dot are contained in the position of test point; At test point processing installing blind, and mounting temperature sensor; The cylinder cap installing temperature sensor is arranged on cylinder body, the engine assembled is installed on experimental stand, tests.
The duct of described installing blind comprises coaxial inner duct and outer duct, and described engine cylinder cap surface is provided with mounting groove, and the diameter of described inner duct is less than the diameter in outer duct, and the degree of depth of inner duct is greater than the degree of depth in outer duct, mounting groove and outer hole link.Outer duct is used for facilitating chip removal when perforate, the degree of depth of inner duct is greater than the follow-up seal process of the deep exploitation in outer duct, mounting groove, for deriving the signal extension line of temperature sensor, makes sensor contact more reliable with the bottom of installing blind by follow-up sealing step.
The degree of depth in described outer duct is between 3mm to 5mm.
The step of described processing installing blind comprises: utilize cutter to rotate and process, the rotating speed of cutter is between 400rpm to 500rpm, and cutter rotating speed can not be too high, the easy breaking otherwise aluminium bits are clamminess, and adopts the chip removal of withdrawing mode; After utilizing high pressure gas to clear up duct, mounting temperature sensor, to avoid thermometric surface oxidation, can not use liquid coolant to avoid forming thermal isolation film in hole immediately; Can not clean after processing;
Described temperature sensor mounted step comprises:
Step 1: inserted in installing blind by temperature sensor thermocouple, and make its temperature susceptibility contact terminal and blind-hole bottom reliable contacts, draws along mounting groove after the output line of sensor passes inner duct and outer duct successively;
Step 2: check that the temperature of temperature sensor indicates whether correctly by room temperature;
Step 3: glue is filled in the gap of inner duct, outer duct and mounting groove, leaves standstill at least 12 hours, glue is fully solidified, prevent that hole leaks, leakage of oil, leakage problem.
Distance between the bottom of described installing blind and measured surface is between 1.5mm to 2mm.
The bottom of described installing blind and the distance between the exhaust manifold of engine and inlet manifold are greater than 2mm, prevent interference problem.
The present invention compared with prior art has following effect: whether test method of the present invention can analyze valve eccentric wear reason and caused because cylinder cap local temperature is too high, for engine cylinder cover and runner design provide strong test figure, be exploitation service better, accelerate research and development process.
Accompanying drawing explanation
Fig. 1, the position view of temperature sensor fixing hole of the present invention;
Fig. 2, position, temperature sensor hole of the present invention processing structure schematic diagram.
Embodiment
Accompanying drawings the specific embodiment of the present invention, engine cylinder cover temperature field experimental technique, cylinder cap is selected some test points, and cylinder cap high temperature dot, the low warm spot of cylinder cap and valve seat high temperature dot are contained in the position of test point, as shown in a point, b point and c point in Fig. 1; At test point processing installing blind, and mounting temperature sensor; The cylinder cap installing temperature sensor is arranged on cylinder body, the engine assembled is installed on experimental stand, tests.
The duct of described installing blind comprises coaxial inner duct and outer duct, and described engine cylinder cap surface is provided with mounting groove, and the mounting groove of present embodiment is cylinder shape groove, and the diameter of described cylinder shape groove is 3mm.The diameter of described inner duct is less than the diameter in outer duct, and the ratio of inner duct and outer channel diameter is 11:15, and the degree of depth of inner duct is greater than the degree of depth in outer duct, mounting groove and outer hole link.
If Fig. 2 (a) is for a point is along A-A line sectional view, in figure, a1 is the outer duct of a point installing blind, a2 is the inner duct of a point installing blind, the outer channel diameter of described a point installing blind is 4mm, the inner duct diameter of a point installing blind is 2.2mm, the degree of depth of a point inner duct is the acute angle between the axis in 31.5mm, a point duct and the axis of mounting groove is 16 ° 10 ';
Fig. 2 (b) is for b point is along the first sectional view of B-B, in figure, b1 is the outer duct of b point installing blind, b2 is the inner duct of b point installing blind, the outer channel diameter of described b point installing blind is 4mm, the inner duct diameter of b point installing blind is 2.2mm, the degree of depth of b point inner duct is the acute angle between 34.5mm, b point duct axis and the axis of mounting groove is 16 ° 40 ';
The degree of depth of described inner duct and the acute angle between duct axis and the axis of mounting groove are all depending on asking for the thickness tested and point out cylinder cap, and the depth and place in duct is all in order to avoid oil circuit on cylinder cap and water route network.
The degree of depth in described outer duct between 3mm to 5mm,
The step of described processing installing blind comprises: utilize cutter to rotate and process, the rotating speed of cutter between 400rpm to 500rpm, and adopts the chip removal of withdrawing mode; High pressure gas is utilized to clear up behind duct mounting temperature sensor immediately.
Described temperature sensor mounted step comprises:
Step 1: inserted in installing blind by temperature sensor thermocouple, and make its temperature susceptibility contact terminal and blind-hole bottom reliable contacts, draws along mounting groove after the output line of sensor passes inner duct and outer duct successively;
Step 2: check that the temperature of temperature sensor indicates whether correctly by room temperature;
Step 3: glue is filled in the gap of inner duct, outer duct and mounting groove, leaves standstill at least 12 hours.
Distance between the bottom of described installing blind and measured surface is between 1.5mm to 2mm.
The bottom of described installing blind and the distance between the exhaust manifold of engine and inlet manifold are greater than 2mm.
The instrument that present embodiment adopts is as shown in table 1:
Table 1 testing equipment and instrument
| Sequence number | Title | Quantity |
| 1 | Threst stand | 1 |
| 2 | Multistation machining center equipment | 1 |
| 3 | Notebook computer (band INCA software) | 1 |
| 4 | Temperature-measuring module | 1 |
| 5 | ECU and bus interface module | 1 |
| 6 | K type thermocouple | Some |
| 7 | Φ 2.2mm Shen Kong zhuan head | 1 |
Claims (7)
1. engine cylinder cover temperature field experimental technique, is characterized in that: on cylinder cap, select some test points, and cylinder cap high temperature dot, the low warm spot of cylinder cap and valve seat high temperature dot are contained in the position of test point; At test point processing installing blind, and mounting temperature sensor; The cylinder cap installing temperature sensor is arranged on cylinder body, the engine assembled is installed on experimental stand, tests.
2. engine cylinder cover temperature field experimental technique according to claim 1, it is characterized in that: the duct of described installing blind comprises coaxial inner duct and outer duct, described engine cylinder cap surface is provided with mounting groove, the diameter of described inner duct is less than the diameter in outer duct, the degree of depth of inner duct is greater than the degree of depth in outer duct, mounting groove and outer hole link.
3. engine cylinder cover temperature field experimental technique according to claim 2, is characterized in that: the degree of depth in described outer duct is between 3mm to 5mm.
4. engine cylinder cover temperature field experimental technique according to claim 1, is characterized in that: the step of described processing installing blind comprises: utilize cutter to rotate and process, the rotating speed of cutter between 400rpm to 500rpm, and adopts the chip removal of withdrawing mode; High pressure gas is utilized to clear up behind duct mounting temperature sensor immediately.
5. engine cylinder cover temperature field experimental technique according to claim 1, is characterized in that: described temperature sensor mounted step comprises:
Step 1: inserted in mounting hole by temperature sensor thermocouple, and make its temperature susceptibility contact terminal and blind-hole bottom reliable contacts, draws along mounting groove after the output line of sensor passes inner duct and outer duct successively;
Step 2: check that the temperature of temperature sensor indicates whether correctly by room temperature;
Step 3: be filled to by glue in inner duct, outer duct and mounting groove, leaves standstill at least 12 hours.
6. engine cylinder cover temperature field experimental technique according to claim 5, is characterized in that: the distance between the bottom of described installing blind and measured surface is between 1.5mm to 2mm.
7. engine cylinder cover temperature field experimental technique according to claim 1, is characterized in that: the bottom of described installing blind and the distance between the exhaust manifold of engine and inlet manifold are greater than 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676943.0A CN105334059A (en) | 2015-10-13 | 2015-10-13 | Temperature field experimental method for engine cylinder head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510676943.0A CN105334059A (en) | 2015-10-13 | 2015-10-13 | Temperature field experimental method for engine cylinder head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105334059A true CN105334059A (en) | 2016-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510676943.0A Pending CN105334059A (en) | 2015-10-13 | 2015-10-13 | Temperature field experimental method for engine cylinder head |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317303A (en) * | 2017-01-16 | 2018-07-24 | 上海汽车集团股份有限公司 | The encapsulating method of engine water channel and thermocouple junctions position |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2485639Y (en) * | 2000-07-28 | 2002-04-10 | 武汉理工大学 | Temperature sensor for engine cylinder inner wall |
| CN102853938A (en) * | 2012-09-18 | 2013-01-02 | 山东大学 | Engine cylinder cover parameter measuring instrument and method based on optical fiber probe |
| CN203216716U (en) * | 2013-05-10 | 2013-09-25 | 杭州电子科技大学 | Engine cylinder head gasket thermal fatigue detection experimental device |
| CN203241367U (en) * | 2013-05-21 | 2013-10-16 | 温州职业技术学院 | Test bench for testing cylinder head temperature field |
| CN104101502A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Engine heat distribution test method |
| CN204085724U (en) * | 2014-10-20 | 2015-01-07 | 广西玉柴机器股份有限公司 | Be applied to the auxiliary mould of cylinder cap thermocouple temperature measurement |
| CN104535604A (en) * | 2014-11-11 | 2015-04-22 | 中国北方发动机研究所(天津) | A head gasket thermal resistance measuring device |
-
2015
- 2015-10-13 CN CN201510676943.0A patent/CN105334059A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2485639Y (en) * | 2000-07-28 | 2002-04-10 | 武汉理工大学 | Temperature sensor for engine cylinder inner wall |
| CN102853938A (en) * | 2012-09-18 | 2013-01-02 | 山东大学 | Engine cylinder cover parameter measuring instrument and method based on optical fiber probe |
| CN203216716U (en) * | 2013-05-10 | 2013-09-25 | 杭州电子科技大学 | Engine cylinder head gasket thermal fatigue detection experimental device |
| CN203241367U (en) * | 2013-05-21 | 2013-10-16 | 温州职业技术学院 | Test bench for testing cylinder head temperature field |
| CN104101502A (en) * | 2014-07-16 | 2014-10-15 | 上汽通用五菱汽车股份有限公司 | Engine heat distribution test method |
| CN204085724U (en) * | 2014-10-20 | 2015-01-07 | 广西玉柴机器股份有限公司 | Be applied to the auxiliary mould of cylinder cap thermocouple temperature measurement |
| CN104535604A (en) * | 2014-11-11 | 2015-04-22 | 中国北方发动机研究所(天津) | A head gasket thermal resistance measuring device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108317303A (en) * | 2017-01-16 | 2018-07-24 | 上海汽车集团股份有限公司 | The encapsulating method of engine water channel and thermocouple junctions position |
| CN108317303B (en) * | 2017-01-16 | 2019-12-03 | 上海汽车集团股份有限公司 | The encapsulating method of engine water channel and thermocouple junctions position |
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