CN104101502A - Engine heat distribution test method - Google Patents
Engine heat distribution test method Download PDFInfo
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- CN104101502A CN104101502A CN201410338464.3A CN201410338464A CN104101502A CN 104101502 A CN104101502 A CN 104101502A CN 201410338464 A CN201410338464 A CN 201410338464A CN 104101502 A CN104101502 A CN 104101502A
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Abstract
The invention relates to the field of engine test methods and particularly relates to an engine heat distribution test method. The engine heat distribution test method includes the following steps of step one, arranging measurement points and installing thermocouples on a main thrust line of a cylinder body, an auxiliary thrust line of the cylinder body, a cylinder cover spark plug hole, and a cylinder cover valve seat; step two, arranging temperature alarming ranges of a cylinder hole main thrust line, a cylinder hole auxiliary thrust line, a cylinder hole connection area, the cylinder cover valve seat, and the cylinder cover piston plug hole; step three, measuring sensitivity of temperatures on an operation condition, a cooling liquid temperature, a cooling liquid system pressure, and a cooling liquid flow. According to the engine heat distribution test method, by means an engine heat distribution test, the problem of engine valve ablation of a small cylinder body is solved; a cylinder cover, a cylinder body, and a cooling system of a supercharged engine are effectively developed.
Description
Technical field
The present invention relates to field engine test method, relate in particular to a kind of engine thermal distribution test method.
Background technology
We have carried out the checking of multiple test to engine at present, such as endurancing, fail-test, performance test, NVH test etc., but complete machine was not carried out to heat distribution test, cannot know top of combustion chamber, cylinder hole wall, the Temperature Distribution situation of the key positions such as water jacket, do not understand the maximum temperature of engine under limit running, be unfavorable for the analysis of some the parts Problem of Failure to producing in process of the test, such as valve ablation problem, spark plug failure mode, piston ablation etc.And, to newly developed or optimize after parts (cylinder cap, piston, valve etc.) do not verify yet and foundation the exploitation of parts caused to certain difficulty.
Owing to there is no heat distribution test, cannot determine the interaction between the temperature at engine key position place and the structure of operating condition, coolant rate, coolant pressure, coolant temperature and cooling system.Therefore, the exploitation of engine-cooling system has been caused to certain difficulty, also failed the design of cooling system to verify.
Summary of the invention
For the defect existing in prior art or deficiency, technical matters to be solved by this invention is: a kind of engine thermal distribution test method is provided, has solved certain little block engine valve ablation problem; By the engine thermal test that distributes, effective exploitation certain engine with supercharger cylinder cap, cylinder body, cooling system.
The technical scheme that the present invention takes, for a kind of engine thermal distribution test method is provided, comprises the following steps:
Step 1), arrange measurement point and thermopair is installed promoting mainly on the line of force and inferior thrust line, cylinder cap spark-plug hole, head valve seat of cylinder body;
Step 2), cylinder hole be set promote mainly the temperature alarming scope of the line of force and inferior thrust line, disjunctor region, cylinder hole, head valve seat, cylinder cap spark-plug hole;
Step 3), the sensitivity of measurement temperature to operating condition, coolant temperature, coolant system pressure, coolant rate.
As a further improvement on the present invention, the measurement point of promoting mainly the line of force and described thrust line described in described step 1) is for apart from plane depth 5 ± 0.5mm, 13 ± 0.5mm, 28 ± 0.5mm, 40 ± 0.5m place on cylinder hole.
As a further improvement on the present invention, in described step 1), the measurement point of head valve seat is apart from firing chamber 2.0 ± 0.1mm, 3.0 ± 0.1mm place.
As a further improvement on the present invention, in described step 1), the measuring point of head valve seat is between inlet and exhaust valve or between exhaust valve.
As a further improvement on the present invention, in described step 3), the measurement point of cylinder cap spark-plug hole is in cylinder cap spark-plug hole between the 2nd and the 3rd screw thread near firing chamber.
As a further improvement on the present invention, described step 2) in the cylinder hole temperature alarming scope of promoting mainly the line of force and time thrust line be 180 DEG C, the temperature alarming scope in disjunctor region, cylinder hole is 240 DEG C, the temperature alarming scope of head valve seat is 400 DEG C of 250 DEG C of aluminium heads or Cast Iron Cylinder Heads, and the temperature alarming scope of cylinder cap spark-plug hole is 205 DEG C.
As a further improvement on the present invention, in described step 3), measuring temperature comprises the following steps the sensitivity of operating condition:
Step 11), operation engine, control engine cooling liquid outlet temperature is 95 ± 3 DEG C;
Step 12), under 1000 ± 20rpm rotating speed, move engine, then accelerate with the increment of 1000 ± 20rpm, until the maximum speed of engine; Each rotating speed in accelerator is record data in the time of full engine load moment of torsion, 90% full load moment of torsion, 80% full load moment of torsion: when temperature variation is no more than 1 DEG C, just start record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.Root
As a further improvement on the present invention, in described step 3), measuring temperature comprises the following steps the sensitivity of coolant temperature:
21) operation engine, progressively increases pressure;
22) move engine at 1000rpm ± 20rpm, then accelerate until the maximum (top) speed of engine with the increment of 1000 ± 20rpm.In the each rotating speed accelerating, record data in the time that cooling liquid outlet temperature is 90 ± 3 DEG C, 100 ± 3 DEG C, 110 ± 3 DEG C, 120 ± 3 DEG C: just start record data when temperature variation is no more than 1 DEG C until measured in span at a minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
As a further improvement on the present invention, in described step 3), measuring temperature comprises the following steps the sensitivity of coolant system pressure:
31), operation engine, progressively increase pressure;
32), with the rotating speed operation engine of 1000 ± 20rpm, then with the increment acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; Record data under each rotating speed full load mode; When being no more than 1 DEG C, temperature variation just starts record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
As a further improvement on the present invention, in described step 3), measuring temperature comprises the following steps the sensitivity of coolant rate:
41) with the rotating speed operation engine of 1000 ± 20rpm, then with the increase acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; With one independently pump drive or with a valve control, test by the flow of following number percent aperture control heat exchanger: 80%, 60%, 40%, 20%; Exceed 10 DEG C of temperature alarming settings or when more, stop the test of this series when measuring temperature; At full load record data; Until metal temperature changes and just starts record data while being no more than 1 DEG C in one minute span.
The invention has the beneficial effects as follows: the Temperature Distribution situation of determining the positions such as cylinder cap, valve, firing chamber, spark-plug hole, and their maximum temperatures under Engine Limit running, be conducive to analyze the failure mode that parts such as melting are burnt in cylinder cap thermal deformation, valve ablation, spark plug, also for the exploitation optimization of parts provides checking support; The sensitivity of the temperature of determining cylinder cap, cylinder body to engine operation condition, coolant temperature, cooling system pressure, coolant rate, for the development and Design of gray iron and cooling system provides reference, simultaneously also for the design of gray iron and cooling system provides checking support.
Brief description of the drawings
Fig. 1 is that in engine thermal distribution test method of the present invention, cylinder body primary and secondary thrust line is installed thermocouple measurement point position assumption diagram front;
Fig. 2 is that in engine thermal distribution test method of the present invention, cylinder body primary and secondary thrust line is installed the thermocouple measurement point position assumption diagram back side;
Fig. 3 is head valve seat measuring point arrangenent diagram in engine thermal distribution test method of the present invention;
Fig. 4 is cylinder cap two air valve engine intake and exhaust valve seating measuring point arrangenent diagrams in engine thermal distribution test method of the present invention;
Fig. 5 is cylinder cap four-valve engine intake and exhaust valve seating measuring point arrangenent diagram in engine thermal distribution test method of the present invention;
Fig. 6 is the process flow diagram of invention engine thermal distribution test method.
Embodiment
Below in conjunction with brief description of the drawings and embodiment, the present invention is further described.
As shown in Figures 1 to 6, the invention provides a kind of engine thermal distribution test method, comprise the following steps:
Step 1), cylinder body promote mainly the line of force and inferior thrust line apart from cylinder hole on plane depth 5 ± 0.5mm, 13 ± 0.5mm, 28 ± 0.5mm, 40 ± 0.5m place thermopair is installed; Between the 2nd and the 3rd screw thread in cylinder cap spark-plug hole near firing chamber, thermopair is installed; At head valve seat, from firing chamber 2.0 ± 0.1mm, 3.0 ± 0.1mm place, between intake and exhaust valve (two air valve engines), or (four-valve engine) installs thermopair between exhaust valve;
Step 2), cylinder hole be set promote mainly the temperature alarming scope of the line of force and inferior thrust line, disjunctor region, cylinder hole, head valve seat, cylinder cap spark-plug hole;
Step 3), the sensitivity of measurement temperature to operating condition, coolant temperature, coolant system pressure, coolant rate.
In described step 3), the measurement point of cylinder cap spark-plug hole is in step 2 described in cylinder cap spark-plug hole) in the cylinder hole temperature alarming scope of promoting mainly the line of force and inferior thrust line be 180 DEG C, the temperature alarming scope in disjunctor region, cylinder hole is 240 DEG C, the temperature alarming scope of head valve seat is 400 DEG C of 250 DEG C of aluminium heads or Cast Iron Cylinder Heads, and the temperature alarming scope of cylinder cap spark-plug hole is 205 DEG C.
In described step 3), measuring temperature comprises the following steps the sensitivity of operating condition:
Step 11), operation engine, control engine cooling liquid outlet temperature is 95 ± 3 DEG C;
Step 12), under 1000 ± 20rpm rotating speed, move engine, then accelerate with the increment of 1000 ± 20rpm, until the maximum speed of engine; Each rotating speed in accelerator is record data in the time of full engine load moment of torsion, 90% full load moment of torsion, 80% full load moment of torsion: when temperature variation is no more than 1 DEG C, just start record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
In described step 3), measuring temperature comprises the following steps the sensitivity of coolant temperature:
21) operation engine, progressively increases pressure;
22) move engine at 1000rpm ± 20rpm, then accelerate until the maximum (top) speed of engine with the increment of 1000 ± 20rpm.In the each rotating speed accelerating, record data in the time that cooling liquid outlet temperature is 90 ± 3 DEG C, 100 ± 3 DEG C, 110 ± 3 DEG C, 120 ± 3 DEG C: just start record data when temperature variation is no more than 1 DEG C until measured in span at a minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
In described step 3), measuring temperature comprises the following steps the sensitivity of coolant system pressure:
31), operation engine, progressively increase pressure;
32), with the rotating speed operation engine of 1000 ± 20rpm, then with the increment acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; Record data under each rotating speed full load mode; When being no more than 1 DEG C, temperature variation just starts record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
In described step 3), measuring temperature comprises the following steps the sensitivity of coolant rate:
41) with the rotating speed operation engine of 1000 ± 20rpm, then with the increase acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; With one independently pump drive or with a valve control, test by the flow of following number percent aperture control heat exchanger: 80%, 60%, 40%, 20%; Exceed 10 DEG C of temperature alarming settings or when more, stop the test of this series when measuring temperature; At full load record data; Until metal temperature changes and just starts record data while being no more than 1 DEG C in one minute span.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (10)
1. an engine thermal distribution test method, is characterized in that: comprise the following steps:
Step 1), arrange measurement point and thermopair is installed promoting mainly on the line of force and inferior thrust line, cylinder cap spark-plug hole, head valve seat of cylinder body;
Step 2), cylinder hole be set promote mainly the temperature alarming scope of the line of force and inferior thrust line, disjunctor region, cylinder hole, head valve seat, cylinder cap spark-plug hole;
Step 3), the sensitivity of measurement temperature to operating condition, coolant temperature, coolant system pressure, coolant rate.
2. according to claim 1, it is characterized in that: the measurement point of promoting mainly the line of force and described thrust line described in described step 1) is apart from plane depth 5 ± 0.5mm, 13 ± 0.5mm, 28 ± 0.5mm, 40 ± 0.5m place on cylinder hole.
3. according to claim 1, it is characterized in that: in described step 1), the measurement point of head valve seat is apart from firing chamber 2.0 ± 0.1mm, 3.0 ± 0.1mm place.
4. according to claim 1, it is characterized in that: in described step 1), the measuring point of head valve seat is between inlet and exhaust valve or between exhaust valve.
5. according to claim 1, it is characterized in that: in described step 3), the measurement point of cylinder cap spark-plug hole is in cylinder cap spark-plug hole between the 2nd and the 3rd screw thread near firing chamber.
6. according to claim 1, it is characterized in that: described step 2) in the cylinder hole temperature alarming scope of promoting mainly the line of force and time thrust line be 180 DEG C, the temperature alarming scope in disjunctor region, cylinder hole is 240 DEG C, the temperature alarming scope of head valve seat is 400 DEG C of 250 DEG C of aluminium heads or Cast Iron Cylinder Heads, and the temperature alarming scope of cylinder cap spark-plug hole is 205 DEG C.
7. according to claim 1, it is characterized in that: in described step 3), measure temperature the sensitivity of operating condition is comprised the following steps:
Step 11), operation engine, control engine cooling liquid outlet temperature is 95 ± 3 DEG C;
Step 12), under 1000 ± 20rpm rotating speed, move engine, then accelerate with the increment of 1000 ± 20rpm, until the maximum speed of engine; Each rotating speed in accelerator is record data in the time of full engine load moment of torsion, 90% full load moment of torsion, 80% full load moment of torsion: when temperature variation is no more than 1 DEG C, just start record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
8. according to claim 1, it is characterized in that: in described step 3), measure temperature the sensitivity of coolant temperature is comprised the following steps:
21) operation engine, progressively increases pressure;
22) move engine at 1000rpm ± 20rpm, then accelerate until the maximum (top) speed of engine with the increment of 1000 ± 20rpm; In the each rotating speed accelerating, record data in the time that cooling liquid outlet temperature is 90 ± 3 DEG C, 100 ± 3 DEG C, 110 ± 3 DEG C, 120 ± 3 DEG C: just start record data when temperature variation is no more than 1 DEG C until measured in span at a minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
9. according to claim 1, it is characterized in that: in described step 3), measure temperature the sensitivity of coolant system pressure is comprised the following steps:
31), operation engine, progressively increase pressure;
32), with the rotating speed operation engine of 1000 ± 20rpm, then with the increment acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; Record data under each rotating speed full load mode; When being no more than 1 DEG C, temperature variation just starts record data until measured in span at one minute; In any one operating mode, exceed temperature alarming settings as long as measure temperature, all stop test.
10. according to claim 1, it is characterized in that: in described step 3), measure temperature to cold
But the sensitivity of flow quantity comprises the following steps:
41) with the rotating speed operation engine of 1000 ± 20rpm, then with the increase acceleration motor of 1000 ± 20rpm, until the maximum speed of engine; With one independently pump drive or with a valve control, test by the flow of following number percent aperture control heat exchanger: 80%, 60%, 40%, 20%; Exceed 10 DEG C of temperature alarming settings or when more, stop the test of this series when measuring temperature; At full load record data; Until metal temperature changes and just starts record data while being no more than 1 DEG C in one minute span.
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| CN201410338464.3A CN104101502A (en) | 2014-07-16 | 2014-07-16 | Engine heat distribution test method |
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| CN201410338464.3A CN104101502A (en) | 2014-07-16 | 2014-07-16 | Engine heat distribution test method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105334059A (en) * | 2015-10-13 | 2016-02-17 | 哈尔滨东安汽车发动机制造有限公司 | Temperature field experimental method for engine cylinder head |
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Application publication date: 20141015 |