CN113551912A - Engine EGR exhaust gas circulation test system - Google Patents
Engine EGR exhaust gas circulation test system Download PDFInfo
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- CN113551912A CN113551912A CN202110466247.2A CN202110466247A CN113551912A CN 113551912 A CN113551912 A CN 113551912A CN 202110466247 A CN202110466247 A CN 202110466247A CN 113551912 A CN113551912 A CN 113551912A
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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
- G01M15/02—Details or accessories of testing apparatus
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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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- 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
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Exhaust-Gas Circulating Devices (AREA)
Abstract
The invention discloses an engine EGR waste gas circulation test system, which comprises: the supercharger is connected with an exhaust port of the engine, boosts the exhaust gas of the engine and then conveys the boosted exhaust gas to an exhaust pipeline, and also boosts the air and then passes through an intercooler and a throttle intake manifold pipeline; the air inlet of the temperature control device is connected with the exhaust pipeline through an exhaust gas bypass pipeline, the generated condensed water flows into the storage device through gravity, and the air outlet of the temperature control device is connected with the control valve and is used for cooling the exhaust gas of the engine to a specified temperature; the air inlet of the filter is connected with the control valve, and the air outlet of the filter is connected with an engine air inlet manifold pipeline; the control valve and the temperature control device receive an external test command to execute corresponding engine exhaust gas air inlet quantity control and temperature control. The invention can realize circulation regulation control and reduce the cost of engine verification test through a calibration system in the prior art. And the control temperature is accurate, and the EGR exhaust gas circulation test verification of the engine can be executed under various temperature conditions.
Description
Technical Field
The invention relates to the field of automobiles, in particular to an engine EGR (exhaust gas recirculation) exhaust gas circulation test system.
Background
Engine testing, which refers to testing of the performance, reliability and durability of an engine using specialized testing and testing equipment. The test of the whole engine is also called engine test. The working conditions of the engine are very harsh and are in a working state of high temperature, high pressure and high speed rotation, and in order to improve the performance, reliability, service life and the like of the idle engine, the conditions of temperature, pressure, corrosion, clearance, stress and the like of the engine under different working conditions need to be fully mastered.
In the engine test industry, EGR exhaust gas circulation generally adopts whole car coolant to carry out temperature cooling, because engine coolant temperature generally all is stabilized about 90 ℃ after the thermostat opens, can't carry out temperature control adjustment, leads to exhaust gas circulation's efficiency to verify, can't contain and go on under each temperature condition. Secondly at present take EGR endless system all directly through directly getting into manifold and blender mixed combustion after the cooling, this kind of mode leads to the granule of waste gas can directly get into the jar burning once more, leads to discharging the particulate matter and does not filter, is unfavorable for discharging the control of particulate matter.
Disclosure of Invention
In this summary, a series of simplified form concepts are introduced that are simplifications of the prior art in this field, which will be described in further detail in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
The invention aims to provide a system capable of executing EGR (exhaust gas recirculation) test verification of an engine under various temperature conditions.
In order to solve the above technical problem, the present invention provides an engine EGR exhaust gas circulation test system, comprising:
the supercharger 2 is connected with an exhaust port of the engine 1, boosts the pressure of the exhaust gas of the engine and then conveys the boosted pressure to an exhaust pipeline 18, and also conveys the boosted pressure air to an intake manifold pipeline 19 through an intercooler 8 and an engine throttle valve 7;
a temperature control device 6, the air inlet of which is connected with an exhaust pipeline 18 through an exhaust gas bypass pipeline 11, the generated condensed water flows into a storage device 9 through gravity, and the air outlet of which is connected with a control valve 5 for reducing the temperature of the engine exhaust gas to a specified temperature;
a filter 4 having an inlet connected to the control valve 5 and an outlet connected to an engine intake manifold line 19;
wherein, the control valve 5 and the temperature control device 6 receive external test commands to execute corresponding engine exhaust gas intake control and temperature control.
Alternatively, in a further improvement of the EGR circulation test system for an engine, the temperature control device 6 includes:
the cooling liquid flows inside the liquid inlet pipeline of the heat exchanger, and exchanges heat with the engine exhaust gas to ensure that the engine exhaust gas entering the heat exchanger reaches the specified temperature;
and the electric proportional valve 10 is connected to a cooling liquid outlet pipeline of the heat exchanger, receives an external test instruction to control the flow of the cooling liquid of the heat exchanger, and further controls the temperature of the exhaust gas flowing through the engine.
Optionally, the system for testing the EGR circulation of an engine is further improved, further comprising:
an air filter connected to the supercharger 2 air inlet for filtering air entering the supercharger 2.
Alternatively, the engine EGR exhaust gas recirculation test system is further modified such that the filter 4 exhaust gas is mixed with the throttle 7 exhaust gas in the intake manifold line 19 before entering the engine.
Alternatively, the engine EGR circulation test system may be further modified such that the storage means 9 is formed with a viewing port for viewing the water level in the storage means 9.
Alternatively, the engine EGR circulation test system is further improved, and the storage device 9 is made of transparent glass material and is formed into a bottle-shaped structure with capacity marks.
Optionally, the system for testing the EGR circulation of an engine is further improved, further comprising:
and the drainage device is arranged in the storage device 9 and is used for draining the condensed water in the storage device 9 when the condensed water level in the storage device 9 reaches a specified position.
Optionally, the engine EGR exhaust gas circulation test system is further improved, and the control accuracy of the temperature control device 6 is ± 1 ℃. The efficiency of the exhaust gas under different temperature conditions can be verified through accurate temperature control to predict engine oil consumption.
Optionally, the engine EGR exhaust gas circulation test system is further improved, and the filter element of the filter 4 is a high-temperature-resistant metal filter element.
Optionally, the engine EGR exhaust gas circulation test system is further improved and used for EGR exhaust gas circulation test of a diesel engine or a gasoline supercharged direct injection engine.
The working principle of the invention is as follows:
under the normal working condition of the engine 1, the exhaust gas from the engine enters the exhaust pipe 18 after being pressurized by the supercharger 2, meanwhile, the exhaust gas bypass pipeline 11 is led out from the rear end of the supercharger 2, enters the temperature control device 6 through the exhaust gas bypass pipeline 11, is cooled through refrigerating fluid such as refrigerating water controlled by the electric proportional valve 1010 to control the temperature within a required temperature range, condensed water generated in the cooling process flows into the storage device 9 through gravity, the exhaust gas enters the filter 4 after being cooled through the exhaust gas control valve 5 to adjust the required exhaust gas quantity, and enters the air inlet manifold pipeline 19 after being subjected to particle filtration to be mixed with the intake air to enter the engine 1 for combustion.
The control valve 5 and the temperature control device 6 of the invention receive an external test instruction (a case instruction of an engine test system) to execute corresponding engine exhaust gas air inlet control and temperature control, can realize circulation regulation control, and reduce the cost of engine verification test (the cost of modification and development of the calibration system) through the calibration system in the prior art. And the control temperature is accurate, and the EGR exhaust gas circulation test verification of the engine can be executed under various temperature conditions.
The invention has convenient and quick control operation and can be used for linkage control with other controls of the engine. The invention filters the waste gas circularly entering the engine, filters the particulate matters in the waste gas and is beneficial to improving the level of the discharged particulate matters.
The invention also arranges a storage device 9 at the bottom of the temperature control device 6 for receiving the condensed water and reducing the risk of the condensed water entering the system. Moreover, the storage device 9 can select a transparent glass bottle structure or be provided with an observation port, so that the amount of the condensed water can be observed at any time, and the device is convenient to clean manually or automatically in time.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification. The drawings are not necessarily to scale, however, and may not be intended to accurately reflect the precise structural or performance characteristics of any given embodiment, and should not be construed as limiting or restricting the scope of values or properties encompassed by exemplary embodiments in accordance with the invention. The invention will be described in further detail with reference to the following detailed description and accompanying drawings:
fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Description of the reference numerals
1 is an engine
2 is a supercharger
4 is a filter
5 is a control valve
6 is a temperature control device
7 is a throttle valve
8 is an intercooler
9 is a storage device
11-21 represent different pipelines
23 is the control circuit of the electric proportional valve 10
24 is an engine test system
25 is a control circuit of the control valve 5
Each arrow indicates the gas or liquid flow direction.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and technical effects of the present invention will be fully apparent to those skilled in the art from the disclosure in the specification. The invention is capable of other embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the general spirit of the invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. The following exemplary embodiments of the present invention may be embodied in many different forms and should not be construed as limited to the specific embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the technical solutions of these exemplary embodiments to those skilled in the art.
The first embodiment:
as shown in fig. 1, an engine EGR exhaust gas recirculation test system includes:
the supercharger 2 is connected with an exhaust port of the engine 1, boosts the exhaust gas of the engine and then conveys the boosted exhaust gas to an exhaust pipeline 18, and also boosts the air and then passes through an intercooler 8 and a throttle valve 7 to an intake manifold pipeline 19;
a temperature control device 6, the air inlet of which is connected with an exhaust pipeline 18 through an exhaust gas bypass pipeline 11, the generated condensed water flows into a storage device 9 through gravity, and the air outlet of which is connected with a control valve 5 for reducing the temperature of the engine exhaust gas to a specified temperature;
the air inlet of the filter 4 is connected with the control valve 5, the air outlet of the filter is connected with an engine air inlet manifold pipeline 19, and a filter element of the filter is a high-temperature resistant metal filter element; the exhaust gas of the filter 4 is mixed with the exhaust gas of the throttle valve 7 in an intake manifold pipeline 19 and then enters the engine;
wherein, the control valve 5 and the temperature control device 6 receive external test commands to execute corresponding engine exhaust gas intake control and temperature control.
It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout the drawings. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items. Other words used to describe the relationship between elements or layers (e.g., "between … …" and "directly between … …", "adjacent to … …" and "directly adjacent to … …", "on … …" and "directly on … …", etc.) should be interpreted in the same manner.
Second embodiment:
an engine EGR exhaust gas recirculation test system comprising:
a supercharger 2 connected to an exhaust port of the engine 1, for supercharging exhaust gas of the engine and delivering the supercharged exhaust gas to an exhaust line 18, and for supercharging air and passing the air through an intake manifold line 19 of the throttle valve 7 and 8;
an air filter connected to the supercharger 2 air inlet for filtering air entering the supercharger 2.
A temperature control device 6, the air inlet of which is connected with an exhaust pipeline 18 through an exhaust gas bypass pipeline 11, the generated condensed water flows into a storage device 9 through gravity, and the air outlet of which is connected with a control valve 5 for reducing the temperature of the engine exhaust gas to a specified temperature;
illustratively, the temperature control device 6 includes:
the cooling liquid flows inside the liquid inlet pipeline of the heat exchanger, and exchanges heat with the engine exhaust gas to ensure that the engine exhaust gas entering the heat exchanger reaches the specified temperature;
and the electric proportional valve 10 is connected to a cooling liquid outlet pipeline of the heat exchanger, receives an external test instruction to control the flow of the cooling liquid of the heat exchanger, and further controls the temperature of the exhaust gas flowing through the engine.
The air inlet of the filter 4 is connected with the control valve 5, the air outlet of the filter is connected with an engine air inlet manifold pipeline 19, and a filter element of the filter is a high-temperature resistant metal filter element; the exhaust gas of the filter 4 is mixed with the exhaust gas of the throttle valve 7 in an intake manifold pipeline 19 and then enters the engine;
wherein, the control valve 5 and the temperature control device 6 receive external test commands to execute corresponding engine exhaust gas intake control and temperature control.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
The third embodiment:
an engine EGR exhaust gas recirculation test system comprising:
a supercharger 2 connected to an exhaust port of the engine 1, for supercharging exhaust gas of the engine and delivering the supercharged exhaust gas to an exhaust line 18, and for supercharging air and passing the air through an intake manifold line 19 of the throttle valve 7 and 8;
an air filter connected to the supercharger 2 air inlet for filtering air entering the supercharger 2.
A temperature control device 6, the air inlet of which is connected with an exhaust pipeline 18 through an exhaust gas bypass pipeline 11, the generated condensed water flows into a storage device 9 through gravity, and the air outlet of which is connected with a control valve 5 for reducing the temperature of the engine exhaust gas to a specified temperature;
illustratively, the temperature control device 6 includes:
the cooling liquid flows inside the liquid inlet pipeline of the heat exchanger, and exchanges heat with the engine exhaust gas to ensure that the engine exhaust gas entering the heat exchanger reaches the specified temperature;
and the electric proportional valve 10 is connected to a cooling liquid outlet pipeline of the heat exchanger, receives an external test instruction to control the flow of the cooling liquid of the heat exchanger, and further controls the temperature of the exhaust gas flowing through the engine.
The air inlet of the filter 4 is connected with the control valve 5, the air outlet of the filter is connected with an engine air inlet manifold pipeline 19, and a filter element of the filter is a high-temperature resistant metal filter element; the exhaust gas of the filter 4 is mixed with the exhaust gas of the throttle valve 7 in an intake manifold pipeline 19 and then enters the engine;
the control valve 5 and the temperature control device 6 receive external test instructions to execute corresponding engine exhaust gas intake control and temperature control;
the storage means 9 is formed with a viewing port for viewing the water level inside the storage means 9;
alternatively, the storage device 9 is made of a transparent glass material and has a bottle-like structure with a capacity mark formed thereon.
The fourth embodiment:
an engine EGR exhaust gas recirculation test system comprising:
a supercharger 2 connected to an exhaust port of the engine 1, for supercharging exhaust gas of the engine and delivering the supercharged exhaust gas to an exhaust line 18, and for supercharging air and passing the air through an intake manifold line 19 of the throttle valve 7 and 8;
an air filter connected to the supercharger 2 air inlet for filtering air entering the supercharger 2.
A temperature control device 6, the air inlet of which is connected with an exhaust pipeline 18 through an exhaust gas bypass pipeline 11, the generated condensed water flows into a storage device 9 through gravity, and the air outlet of which is connected with a control valve 5 for reducing the temperature of the engine exhaust gas to a specified temperature;
illustratively, the temperature control device 6 includes:
the cooling liquid flows inside the liquid inlet pipeline of the heat exchanger, and exchanges heat with the engine exhaust gas to ensure that the engine exhaust gas entering the heat exchanger reaches the specified temperature;
and the electric proportional valve 10 is connected to a cooling liquid outlet pipeline of the heat exchanger, receives an external test instruction to control the flow of the cooling liquid of the heat exchanger, and further controls the temperature of the exhaust gas flowing through the engine.
The air inlet of the filter 4 is connected with the control valve 5, the air outlet of the filter is connected with an engine air inlet manifold pipeline 19, and a filter element of the filter is a high-temperature resistant metal filter element; the exhaust gas of the filter 4 is mixed with the exhaust gas of the throttle valve 7 in an intake manifold pipeline 19 and then enters the engine;
the control valve 5 and the temperature control device 6 receive external test instructions to execute corresponding engine exhaust gas intake control and temperature control;
the storage means 9 is formed with a viewing port for viewing the water level inside the storage means 9;
alternatively, the storage device 9 is made of a transparent glass material and has a bottle-like structure with a capacity mark formed thereon.
A water discharge device arranged in the storage device 9 and used for discharging condensed water in the storage device 9 when the condensed water level in the storage device 9 reaches a designated position;
alternatively, the drainage means may be a manual drain, such as a water conduit; or an automatic drain, such as a drain pump triggered by a water level sensor signal.
Alternatively, in a modification of the first to fourth embodiments, an exhaust gas post-control temperature sensor 22 is provided in the rear-end pipe of the filter 4, and is used to monitor the actual post-control exhaust gas temperature and feed it back to the engine test system 24.
Alternatively, the control accuracy of the temperature control device 6 of the first to fourth embodiments is ± 1 ℃, and the higher the suggested temperature control accuracy is, the better the technical effect of the present invention is, which can be used for the EGR exhaust gas circulation test of the diesel engine or the gasoline supercharged direct injection engine.
Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.
The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.
Claims (10)
1. An engine EGR exhaust gas recirculation test system, comprising:
the supercharger (2) is connected with an exhaust port of the engine (1), boosts the pressure of engine exhaust gas and then conveys the boosted pressure to an exhaust pipeline (18), and also pressurizes air and then conveys the pressurized air to an intake manifold pipeline 19(7) through an intercooler (8) and a throttle valve (7);
the temperature control device (6) is connected with an exhaust pipeline (18) through an exhaust gas bypass pipeline (11) at an air inlet, the generated condensed water flows into the storage device (9) through gravity, and the exhaust port is connected with a control valve (5) for reducing the temperature of the engine exhaust gas to a specified temperature;
a filter (4) having an inlet connected to a control valve (5) and an outlet connected to an engine intake manifold line (19);
the control valve (5) and the temperature control device (6) receive external test commands to execute corresponding engine exhaust gas air intake control and temperature control.
2. The engine EGR exhaust gas recirculation test system according to claim 1, characterized in that the temperature control means (6) comprises:
the cooling liquid flows inside the liquid inlet pipeline of the heat exchanger, and exchanges heat with the engine exhaust gas to ensure that the engine exhaust gas entering the heat exchanger reaches the specified temperature;
and the electric proportional valve (10) is connected to a cooling liquid outlet pipeline of the heat exchanger, receives an external test instruction to control the flow of the cooling liquid of the heat exchanger, and further controls the temperature of the exhaust gas flowing through the engine.
3. The engine EGR exhaust gas recirculation test system of claim 1, further comprising:
and the air filter (3) is connected with an air inlet of the supercharger (2) and is used for filtering air entering the supercharger (2).
4. The engine EGR exhaust gas recirculation test system of claim 1, wherein:
the exhaust gas of the filter (4) is mixed with the exhaust gas of the throttle valve (7) in an intake manifold pipeline (19) and then enters the engine.
5. The engine EGR exhaust gas recirculation test system of claim 1, wherein: the storage means (9) is formed with a viewing port for viewing the water level within the storage means (9).
6. The engine EGR exhaust gas recirculation test system of claim 1, wherein: the storage device (9) is made of transparent glass material and is formed with a bottle-shaped structure with capacity marks.
7. The engine EGR exhaust gas recirculation test system of claim 5, further comprising:
and the drainage device is arranged in the storage device (9) and is used for draining the condensed water in the storage device (9) when the condensed water level in the storage device (9) reaches a specified position.
8. The engine EGR exhaust gas recirculation test system of claim 1, wherein: the control precision of the temperature control device (6) is +/-1 ℃.
9. The engine EGR exhaust gas recirculation test system of claim 1, wherein: the filter element of the filter (4) adopts a high-temperature resistant metal filter element.
10. The engine EGR exhaust gas recirculation test system of any of claims 1-9, wherein: the EGR device is used for EGR exhaust gas circulation tests of diesel engines or gasoline supercharged direct injection engines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110466247.2A CN113551912B (en) | 2021-04-28 | 2021-04-28 | Engine EGR exhaust gas circulation test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110466247.2A CN113551912B (en) | 2021-04-28 | 2021-04-28 | Engine EGR exhaust gas circulation test system |
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| CN113551912A true CN113551912A (en) | 2021-10-26 |
| CN113551912B CN113551912B (en) | 2022-04-19 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195592A (en) * | 2012-01-10 | 2013-07-10 | 福特环球技术公司 | A method and observer for determining the exhaust manifold temperature in a turbocharged engine |
| CN203658049U (en) * | 2013-12-31 | 2014-06-18 | 天津大学 | Wide pressure scope EGR measuring system |
| CN204255668U (en) * | 2014-11-21 | 2015-04-08 | 江苏大学 | The circulating device of simulated engine waste gas test cooler for recycled exhaust gas |
| CN106596115A (en) * | 2017-01-17 | 2017-04-26 | 同济大学 | Engine EGR fluid simulation test bench |
| CN211174364U (en) * | 2019-09-18 | 2020-08-04 | 广西玉柴机器股份有限公司 | Exhaust gas recirculation system for measuring EGR rate |
-
2021
- 2021-04-28 CN CN202110466247.2A patent/CN113551912B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195592A (en) * | 2012-01-10 | 2013-07-10 | 福特环球技术公司 | A method and observer for determining the exhaust manifold temperature in a turbocharged engine |
| CN203658049U (en) * | 2013-12-31 | 2014-06-18 | 天津大学 | Wide pressure scope EGR measuring system |
| CN204255668U (en) * | 2014-11-21 | 2015-04-08 | 江苏大学 | The circulating device of simulated engine waste gas test cooler for recycled exhaust gas |
| CN106596115A (en) * | 2017-01-17 | 2017-04-26 | 同济大学 | Engine EGR fluid simulation test bench |
| CN211174364U (en) * | 2019-09-18 | 2020-08-04 | 广西玉柴机器股份有限公司 | Exhaust gas recirculation system for measuring EGR rate |
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| CN113551912B (en) | 2022-04-19 |
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