CN112128028B - Automatic air inlet system of engine suitable for low temperature storehouse is experimental - Google Patents
Automatic air inlet system of engine suitable for low temperature storehouse is experimental Download PDFInfo
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- CN112128028B CN112128028B CN202011016326.5A CN202011016326A CN112128028B CN 112128028 B CN112128028 B CN 112128028B CN 202011016326 A CN202011016326 A CN 202011016326A CN 112128028 B CN112128028 B CN 112128028B
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- Prior art keywords
- valve
- air
- outlet
- inlet
- air supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10006—Air intakes; Induction systems characterised by the position of elements of the air intake system in direction of the air intake flow, i.e. between ambient air inlet and supply to the combustion chamber
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
- F02M35/10137—Flexible ducts, e.g. bellows or hoses
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10255—Arrangements of valves; Multi-way valves
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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
- G01M15/04—Testing internal-combustion engines
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
- Testing Of Engines (AREA)
Abstract
The invention discloses an automatic engine air inlet system suitable for a low-temperature cabin test, which comprises an intercooler, a combination valve assembly, a first air supply pipeline, a second air supply pipeline and a controller, wherein an outlet of the intercooler is communicated with an air inlet of an engine through a first connecting pipeline, and an inlet of the intercooler is communicated with an outlet of the combination valve assembly through a second connecting pipeline; an inlet of the first air supply pipeline is communicated with the interior of the low-temperature cabin, and an outlet of the first air supply pipeline is connected with the combination valve assembly; an inlet of the second gas supply pipeline is communicated with the outside of the low-temperature bin, and an outlet of the second gas supply pipeline is connected with the combination valve assembly; the controller is connected with the combination valve assembly through a control wire harness and controls the communication between the two air supply pipelines and the outlet of the combination valve assembly. The invention has the beneficial effects that: the invention can realize the self-adaptive switching of air taking from the interior or the exterior of the low-temperature cabin, and effectively solves the problems of frosting in the low-temperature cabin and icing and blockage of an air inlet caused by long-time air taking operation of the engine from the interior of the low-temperature cabin.
Description
Technical Field
The invention relates to engine test related equipment, in particular to an automatic air inlet system of an engine, which is suitable for a low-temperature chamber test.
Background
The engine long-time running need consume a large amount of air, if directly get gas and can cause the interior negative pressure of storehouse from low temperature storehouse, and a large amount of humid air leads to frosting and the frozen jam of air inlet in the low temperature storehouse in getting into the storehouse, influences refrigeration efficiency, causes low temperature storehouse temperature out of control even.
At present, engine low-temperature tests are mainly divided into two types: one is a test with short running time of the engine and strict requirement on the air inlet temperature in the test process, such as a low-temperature cold start test; the other type is a test that the engine needs to run for a long time and the engine does not have special requirements on the air inlet temperature after being started, such as a low-temperature carbon accumulation test. For the first type of low-temperature test, because the running time of the engine is short and strict requirements are made on the air inlet temperature, air can be directly taken from the bin; for the second type of test, the engine start-up procedure took gas from the bin. However, because the running time of the engine is long, in order to avoid frosting in the low-temperature cabin and icing and blocking of the air inlet due to negative pressure in the cabin, the engine needs to take air from the outside of the cabin after being started, and the existing single air inlet device (air inlet in the cabin or air inlet outside the cabin) cannot meet the air inlet requirement in the test process.
Disclosure of Invention
The invention aims to provide an automatic air inlet system of an engine, which can automatically switch air inlet modes according to low-temperature test requirements and is suitable for low-temperature chamber tests, aiming at the defects of the prior art.
The technical scheme adopted by the invention is as follows: an automatic engine air inlet system suitable for a low-temperature cabin test comprises an intercooler, a combination valve assembly, a first air supply pipeline, a second air supply pipeline and a controller, wherein an outlet of the intercooler is communicated with an air inlet of an engine through a first connecting pipeline, and an inlet of the intercooler is communicated with an outlet of the combination valve assembly through a second connecting pipeline; an inlet of the first air supply pipeline is communicated with the interior of the low-temperature cabin, and an outlet of the first air supply pipeline is connected with the combination valve assembly; an inlet of the second gas supply pipeline is communicated with the outside of the low-temperature bin, and an outlet of the second gas supply pipeline is connected with the combination valve assembly; the controller is connected with the combined valve assembly through a control wire harness and controls the two air supply pipelines to be communicated with the outlet of the combined valve assembly; when one of the air supply pipelines is communicated with the outlet of the combination valve assembly, the other air supply pipeline is disconnected with the outlet of the combination valve assembly.
According to the scheme, the combined valve assembly comprises a first valve, a second valve, an electric linkage device and a three-way joint, wherein an inlet of the first valve is communicated with an outlet of a first air supply pipeline, and an outlet of the first valve is communicated with a first inlet of the three-way joint; an inlet of the second valve is communicated with an outlet of the second air supply pipeline, an outlet of the second valve is communicated with a second inlet of the three-way joint, and an outlet of the three-way joint is communicated with a second connecting pipeline; the first valve and the second valve are respectively connected with an electric linkage device, and the electric linkage device is connected with a controller; the controller controls the opening and closing of the first valve and the second valve in a linkage mode through the electric linkage device, and when one valve is opened, the other valve is closed. In the invention, the first valve and the second valve are both ball valves.
According to the scheme, the inlet of the first air supply pipeline is connected with a first air filter; the first air filter is arranged in the low-temperature bin.
According to the scheme, the inlet of the second air supply pipeline is connected with a second air filter, and the second air filter is arranged outside the low-temperature bin.
According to the scheme, each connecting pipeline and each air supply pipeline are low-temperature-resistant corrugated pipes.
According to the scheme, the first valve and the second valve are ball valves.
The invention has the beneficial effects that:
1. the combined valve assembly comprises two air inlets and an air outlet, wherein the two air inlets are respectively connected with the first air supply pipeline and the second air supply pipeline, different air inlet modes can be selected under different test conditions, and further, in a test requiring long-time running of an engine, air is taken out from the cabin so as to prevent the problems of condensation and the like caused by negative pressure generated in a low-temperature cabin.
2. Two valves in the combined valve assembly designed by the invention are in linkage control by the electric linkage device, the controller acquires an engine starting signal and starts timing after the engine is started, when the opening time of the first valve exceeds 2 minutes after the engine is started is monitored, the controller judges that an engine operation test is a long-time working condition and needs to intake air from outside the cabin, the controller sends a control signal to the electric linkage device at the moment, the electric linkage device executes an instruction, the first valve is closed, the second valve is opened simultaneously, the self-adaptive switching of taking air from the inside of the low-temperature cabin or the outside of the low-temperature cabin is realized, and the problems of frosting in the low-temperature cabin and icing and blockage of an air inlet caused by the long-time air taking operation of the engine from the inside of the low-temperature cabin are effectively improved.
3. In the invention, each pipeline is designed into a low-temperature-resistant corrugated pipe, so that the pipeline cannot be damaged by the influence of the low-temperature cabin environment, and the air inlet reliability of the engine is ensured.
4. The invention has reasonable structural design and simple and convenient operation and maintenance.
Drawings
Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.
Wherein: 1. an engine air intake; 2. a first connecting line; 3. an intercooler; 4. a second connecting line; 5. a tee joint; 6. a first valve; 7. a first air cleaner; 8. a first air supply line; 9. an electric linkage; 10. a second valve; 11. a combination valve assembly; 12. a second gas supply line; 13. a second air cleaner; 14. and a low-temperature cabin.
Detailed Description
For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
The automatic air intake system of the engine suitable for the low temperature cabin test as shown in fig. 1 comprises an intercooler 3, a combination valve assembly 11, a first air supply pipeline 8, a second air supply pipeline 12 and a controller, wherein an outlet of the intercooler 3 is communicated with an air inlet 1 of the engine through a first connecting pipeline 2, and an inlet of the intercooler 3 is communicated with an outlet of the combination valve assembly 11 through a second connecting pipeline 4; an inlet of the first air supply pipeline 8 is communicated with the interior of the low-temperature cabin 14, and an outlet of the first air supply pipeline 8 is connected with the combination valve assembly 11; an inlet of the second air supply pipeline 12 is communicated with the outside of the low-temperature cabin 14, and an outlet of the second air supply pipeline 12 is connected with the combination valve assembly 11; the controller is connected with the combination valve assembly 11 through a control wire harness and controls the two air supply pipelines to be communicated with the outlet of the combination valve assembly 11; when one of the air supply pipelines is communicated with the outlet of the combination valve assembly 11, the other air supply pipeline is disconnected with the outlet of the combination valve assembly 11.
In the invention, the intercooler 3 is arranged between the combination valve assembly 11 and the engine air inlet 1 through the first connecting pipeline 2 and is positioned in the low-temperature cabin 14, and the temperature of the air outside the low-temperature cabin 14 is reduced after passing through the intercooler 3, thereby avoiding the high temperature of the air outside the cabin from influencing the performance of the engine.
Preferably, the combination valve assembly 11 comprises a first valve 6, a second valve 10, an electric linkage 9 and a three-way joint 5, wherein an inlet of the first valve 6 is communicated with an outlet of the first air supply pipeline 8, and an outlet of the first valve 6 is communicated with a first inlet of the three-way joint 5; an inlet of the second valve 10 is communicated with an outlet of the second air supply pipeline 12, an outlet of the second valve 10 is communicated with a second inlet of the three-way joint 5, and an outlet of the three-way joint 5 is communicated with the second connecting pipeline 4; the first valve 6 and the second valve 10 are respectively connected with an electric linkage device 9, and the electric linkage device 9 is connected with a controller; the controller controls the opening and closing of the first valve 6 and the second valve 10 in a linkage mode through the electric linkage device 9, and when one valve is opened, the other valve is closed. In the present invention, the electric linkage 9 is a conventional one, and is not described herein again.
Preferably, a first air cleaner 7 is connected to an inlet of the first air supply line 8. The first air filter 7 is arranged in the low-temperature chamber 14.
Preferably, a second filter is connected to the inlet of the second air supply line 12. The second air filter 13 is arranged outside the low-temperature bin 14.
In the invention, the two air filters are detachably connected and can be replaced by matched air filters according to different types of engines.
Preferably, each connecting pipeline and each air supply pipeline are low-temperature-resistant corrugated pipes.
The working principle of the invention is as follows: the controller collects an engine starting signal and sends a control signal, and after the controller is powered on and the engine is stopped each time, the controller controls the combination valve assembly 11 to be in a default working state that the first valve 6 is opened and the second valve 10 is closed. Before the engine is started, the controller needs to be electrified, and the controller finishes a default working state; when the engine is started, air is taken from the low-temperature chamber 14, the controller controls the first valve 6 to be opened and the second valve 10 to be closed, and the air in the low-temperature chamber 14 sequentially enters the air inlet 1 of the engine through the first air filter 7, the first air supply pipeline 8, the first valve 6, the three-way joint 5, the second connecting pipeline 4, the intercooler 3 and the first connecting pipeline 2. The controller starts timing immediately after acquiring an engine starting signal, when the opening time of the first valve 6 exceeds 2 minutes after the engine is started is monitored, the controller judges that the engine operation test is a long-time working condition and needs to intake air from the outside of the low-temperature cabin 14, the controller sends a control signal to the electric linkage device 9 at the moment, the electric linkage device 9 executes an instruction, the first valve 6 is closed, meanwhile, the second valve 10 is opened, the engine is automatically switched from the air intake operation in the low-temperature cabin 14 to the air intake operation from the outside of the low-temperature cabin 14, and the air outside the low-temperature cabin 14 sequentially enters the engine air inlet 1 through the second air filter 13, the second air supply pipeline 12, the second valve 10, the three-way joint 5, the second connecting pipeline 4, the intercooler 3 and the first connecting pipeline 2. The seamless self-adaptive switching from air taking from the low-temperature cabin 14 to air taking from the outside of the low-temperature cabin 14 of the engine in the running process of the engine is realized, and the problems of frosting in the low-temperature cabin 14 and icing and blocking of an air inlet caused by long-time air taking running of the engine from the cabin are effectively solved.
It should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and the present invention is not limited thereto, and although the present invention has been described in detail with reference to the embodiments, it will be apparent to those skilled in the art that modifications can be made to the technical solutions described in the above-mentioned embodiments, or equivalent substitutions of some technical features, but any modifications, equivalents, improvements and the like within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims (6)
1. An automatic engine air inlet system suitable for a low-temperature cabin test is characterized by comprising an intercooler, a combination valve assembly, a first air supply pipeline, a second air supply pipeline and a controller, wherein an outlet of the intercooler is communicated with an air inlet of an engine through a first connecting pipeline, and an inlet of the intercooler is communicated with an outlet of the combination valve assembly through a second connecting pipeline; an inlet of the first air supply pipeline is communicated with the interior of the low-temperature cabin, and an outlet of the first air supply pipeline is connected with the combination valve assembly; an inlet of the second gas supply pipeline is communicated with the outside of the low-temperature bin, and an outlet of the second gas supply pipeline is connected with the combination valve assembly; the controller is connected with the combined valve assembly through a control wire harness and controls the two air supply pipelines to be communicated with the outlet of the combined valve assembly; when one of the air supply pipelines is communicated with the outlet of the combination valve assembly, the other air supply pipeline is disconnected with the outlet of the combination valve assembly.
2. The engine automatic air intake system of claim 1, wherein the combination valve assembly includes a first valve, a second valve, an electrically operated linkage, and a three-way joint, an inlet of the first valve being in communication with an outlet of the first air supply line, an outlet of the first valve being in communication with a first inlet of the three-way joint; an inlet of the second valve is communicated with an outlet of the second air supply pipeline, an outlet of the second valve is communicated with a second inlet of the three-way joint, and an outlet of the three-way joint is communicated with a second connecting pipeline; the first valve and the second valve are respectively connected with an electric linkage device, and the electric linkage device is connected with a controller; the controller controls the opening and closing of the first valve and the second valve in a linkage mode through the electric linkage device, and when one valve is opened, the other valve is closed.
3. The automatic engine air intake system according to claim 1, wherein a first air cleaner is connected to an inlet of the first air supply line; the first air filter is arranged in the low-temperature bin.
4. The automatic engine air intake system of claim 1, wherein a second air cleaner is coupled to an inlet of the second air supply line, the second air cleaner being disposed outside the cold box.
5. The automatic engine air intake system of claim 1, wherein each of the connecting lines and each of the air supply lines are low temperature resistant bellows.
6. The automatic engine air intake system of claim 2, wherein the first valve and the second valve are ball valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011016326.5A CN112128028B (en) | 2020-09-24 | 2020-09-24 | Automatic air inlet system of engine suitable for low temperature storehouse is experimental |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011016326.5A CN112128028B (en) | 2020-09-24 | 2020-09-24 | Automatic air inlet system of engine suitable for low temperature storehouse is experimental |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112128028A CN112128028A (en) | 2020-12-25 |
| CN112128028B true CN112128028B (en) | 2021-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011016326.5A Active CN112128028B (en) | 2020-09-24 | 2020-09-24 | Automatic air inlet system of engine suitable for low temperature storehouse is experimental |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201438146U (en) * | 2009-07-28 | 2010-04-14 | 广西玉柴机器股份有限公司 | Engine low temperature test system |
| CN103048140B (en) * | 2012-12-27 | 2015-04-08 | 东南大学 | Device for testing low-temperature low-air-pressure starting and operating characteristics of engine |
| WO2016107469A1 (en) * | 2014-12-31 | 2016-07-07 | 上海擎掣汽车电子有限公司 | Engine and air inlet system thereof |
| CN106050490B (en) * | 2016-05-31 | 2018-08-07 | 潍柴动力股份有限公司 | A kind of air intake control method of gas handling system, pneumatic system and air compressor |
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2020
- 2020-09-24 CN CN202011016326.5A patent/CN112128028B/en active Active
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| CN112128028A (en) | 2020-12-25 |
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