WO2008036993A2 - Procédé et dispositif pour alimenter un moteur à combustion interne en gaz de combusion conditionné - Google Patents

Procédé et dispositif pour alimenter un moteur à combustion interne en gaz de combusion conditionné Download PDF

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Publication number
WO2008036993A2
WO2008036993A2 PCT/AT2007/000455 AT2007000455W WO2008036993A2 WO 2008036993 A2 WO2008036993 A2 WO 2008036993A2 AT 2007000455 W AT2007000455 W AT 2007000455W WO 2008036993 A2 WO2008036993 A2 WO 2008036993A2
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WO
WIPO (PCT)
Prior art keywords
combustion engine
internal combustion
gas
engine
combustion gas
Prior art date
Application number
PCT/AT2007/000455
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German (de)
English (en)
Other versions
WO2008036993A3 (fr
Inventor
Seyed Mehdi Khaghanian
Original Assignee
Avl List Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avl List Gmbh filed Critical Avl List Gmbh
Publication of WO2008036993A2 publication Critical patent/WO2008036993A2/fr
Publication of WO2008036993A3 publication Critical patent/WO2008036993A3/fr

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Classifications

    • 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

Definitions

  • the invention relates to a method for supplying a combustion machine with conditioned combustion gas, in particular air, preferably in test benches, comprising the supply of at all times substantially the same amount of completely pressure, humidity and / or temperature-conditioned combustion gas, which amount at least that of The amount of fuel consumed by the respective internal combustion engine at full load, with combustion gas bypassing the combustion engine being bypassed, and with the exhaust of the internal combustion engine being mixed with a diluent gas and preferably aspirated with constant volumetric flow, as well as a device for supplying an internal combustion engine with conditioned combustion gas, especially air , preferably in test benches, comprising a supply line emanating from a conditioning plant to the combustion engine for pressure / humidity and / or temperature-conditioned combustion Sgas, possibly a fan in the supply line, as well as an exhaust system for the exhaust gas of the internal combustion engine, preferably a CVS system, wherein the conditioning system and the supply line are designed for at least the amount of combustion gas required by the respective internal combustion engine at full load.
  • the condition of the intake air greatly influences the performance of an internal combustion engine.
  • Increasing air pressure increases the engine torque in gasoline engines, for example, while an increase in the temperature of the combustion air causes a drop in power.
  • the moisture content of the intake air has little influence on the engine power, but effects on the exhaust emissions, especially of nitrogen oxides, not negligible, which is the case both in gasoline and diesel engines. Since the development work of internal combustion engines raises ever greater demands with regard to the reproducibility and accuracy of the test results, it is therefore necessary to eliminate as much as possible all the conditions influencing the test results and to condition the intake air for this purpose in order to achieve comparable test conditions on the engine test bench.
  • the pressure conditions on and around the engine should be as flexible as possible in order to simulate many operating conditions and environmental conditions.
  • WO 02/42730 A2 A reliable, constant conditioning of the combustion air even under dynamic and highly dynamic operating conditions is described in WO 02/42730 A2.
  • a substantially constant, fully conditioned amount of the combustion gas is provided at any time, which corresponds at least to the maximum amount required of the respective internal combustion engine, so that the conditioning does not have to be tracked dynamically.
  • the engine on the test bench branches from a constant, for the - Required quantity off, while not needed combustion gas bypasses the internal combustion engine and mixed with the exhaust gas.
  • the method defined above is inventively characterized in that the proportion of the internal combustion engine supplied combustion gas is regulated independently of the load state.
  • the conditioning also takes place here for a constant amount of combustion gas, preferably in accordance with the maximum amount required by the engine at full load, which constant and fully conditioned amount is also supplied to before the internal combustion engine.
  • the internal combustion engine in the intake tract supplied amount of combustion gas is set arbitrarily and controlled without the load or operating state of the engine has direct influence on this quantity measurement.
  • the most varied pressure values can be realized quickly and flexibly at the intake tract of the internal combustion engine, regardless of the pressure in the environment. This is also advantageous when using measuring instruments designed for normal pressure on the test stand.
  • combustion gas not supplied to the internal combustion engine is blown into the environment of the internal combustion engine.
  • This is the simplest variant for deriving the combustion air not required by the engine, which then - depending on the absolute amount of supplied, conditioned combustion gas - also allows a pressure setting in the environment of the internal combustion engine, preferably independent of the pressure at the intake of the internal combustion engine.
  • this hot exhaust gas has to be diluted
  • a variant of the method is advantageously used in which combustion gas not required by the internal combustion engine is mixed as dilution gas with the exhaust gas of the internal combustion engine.
  • the pressure and / or the quantity of the Combustion gas mixed with the exhaust gas is controlled independently of the state of the internal combustion engine and independently of the control of the combustion gas supplied to the internal combustion engine.
  • the method is in its respect to the pressure setting in the various areas and / or around the internal combustion engine most flexible embodiment, characterized in that the amount of extracted exhaust gas of the internal combustion engine, regardless of the state of the internal combustion engine, regardless of the regulation of the amount of combustion gas supplied to the internal combustion engine and is controlled independently of the control of the amount of the combustion gas mixed with the exhaust gas.
  • the initially defined device for supplying an internal combustion engine with conditioned combustion gas, in particular air, preferably in test stands, is to solve the above-mentioned problem, characterized in that the supply line has a connection with the environment of the internal combustion engine and between this compound and the internal combustion engine, a first flow - Control device is provided.
  • this control device By means of this control device, the quantity actually supplied to the engine can be set and controlled in a freely selectable manner from a constant amount of conditioned combustion gas. This regulation can take place without being influenced by the load or operating state of the engine, as a result of which a wide variety of pressure values can be realized quickly and flexibly at the intake tract of the internal combustion engine, regardless of the pressure in the surroundings of the engine.
  • a particularly advantageous embodiment of this device according to the invention is characterized in that the connection with the surroundings of the internal combustion engine is formed by a preferably exchangeable funnel-shaped blow-out opening in front of an inlet opening of a line section leading to the internal combustion engine.
  • the first flow control device is furthermore provided in the line section leading to the internal combustion engine.
  • this is further characterized in that a connecting passage from the line section leading to the internal combustion engine to the exhaust gas exhaust system is provided.
  • a connecting passage from the line section leading to the internal combustion engine to the exhaust gas exhaust system is provided.
  • a combustion engine wherein a second flow control device is provided in this connection passage.
  • a variant of the device is characterized in that a third valve is provided in the exhaust gas line in front of the exhaust system Flow control device is provided.
  • At least some of the flow control devices are formed by control valves which are preferably adjustable at any time and independently of one another.
  • drawing figure is schematically shown a test stand for internal combustion engines according to an embodiment of the invention.
  • An internal combustion engine 1 for example, a gasoline or diesel engine is supplied via a line 2 with fuel and via a line 3 with combustion gas, preferably air.
  • the combustion air is supplied via a usually outside of the actual test bench cell conditioning system 4 and the supply line 5 in an amount to the test bench, which corresponds to the maximum amount consumed by the engine 1.
  • the upstream conditioning section 4 always the same amount to be supplied to treat air, which makes the design especially the regulation of this conditioning extremely simple, since the dynamics of the internal combustion engine does not have to be considered.
  • the exhaust gas of the internal combustion engine 1 is discharged via an exhaust pipe 6 and an exhaust system for the exhaust gas of the internal combustion engine, preferably a CVS system 7, 8, 9, consisting of the CVS filter 7, the dilution tunnel 8 and the blower 9. Between the filter 7 and the dilution tunnel 8, a connection passage 10 to the conditioning installation 4 can be installed.
  • the combustion gas conditioning apparatus 4 will usually comprise a dust filter, a gas delivery means, preferably a centrifugal fan or blower, a negative pressure control damper, an air cooler - preferably an air / cold water heat exchanger with a cold water control valve. aren uurcnsaiz of u me ium -, a rop ena sc ei he ür ondensat, and a controllable by means of control device in the heating power air heater included.
  • a steam generator can be provided, from which steam can be metered via a steam metering valve for adjusting the humidity in the main air line.
  • the air conditioned in these parts of the installation passes via the supply line 5 to a preferably exchangeable funnel-shaped blow-off opening 11 in front of an inlet opening 12 of the line 3 which leads to the combustion engine.
  • a filter 13 is inserted in the inlet opening 12 in order to prevent contaminants from the environment of the inlet opening from entering To enter line 3.
  • a first flow control device is provided between the inlet port 12 and the internal combustion engine 1, preferably near the inlet port 12, preferably as at any time and independently of any other control devices on the test bench adjustable control valve 14 is formed.
  • connection passage 15 to the exhaust system 7, 8, 9, preferably to the dilution tunnel 8 of the CVS system.
  • This connection passage 15 starts from a position between the first flow control device 14 and the internal combustion engine 1 and advantageously includes a second flow control device, which in turn is designed as adjustable at any time and independently of any other control devices on the test bench control flap 16.
  • the high prescribed dilution factors can be achieved by mixing the exhaust gas of the internal combustion engine 1, the ambient air sucked in via the filter 7 and the conditioned combustion gas not required for the combustion process.
  • the integration of the conditioned combustion gas as a diluent gas makes it possible to determine the exact amount of harmful substances in a simple and reliable manner.
  • the combustion passed to the internal combustion engine 1 should , Maximum intake air amount of the engine 1, so that the exhaust gas is diluted with at least the same amount or more of dilution air.
  • a further, third flow control device is provided in the exhaust pipe 6 before its confluence with the suction system 7, 8, 9, which is also preferably designed as a control flap 17 which can be adjusted at any time and independently of one another. This can also be adjusted quickly and directly pressure conditions that differ from the usual scheme, in which the pressure at the outlet of the exhaust passage 6 largely correspond to that at the inlet 12 of the suction passageway serving as a conduit section 3.
  • a further control valve 18 may be provided as a flow control device to adjust together with the flow control device 17 in the exhaust duct 6 a corresponding to the respective requirements differential pressure between the engine inlet and engine outlet.
  • connecting passage 15 may optionally a small variable speed axial fan pressure loss compensation or to set a well-defined pressure difference between intake 3 exhaust pipe 6 of the engine 1 are arranged, which is speed controlled by means of a regulator in dependence of the differential pressure between the mouth and outlet of the connecting passage 15.
  • an electronic control and regulating device is provided, in which all control devices and controllers necessary for operation are integrated. It is advantageously taken into account that the mass flow is kept substantially constant regardless of the absolute pressure.
  • the regulation of the air pressure is carried out mainly by throttling the control valve 14 for negative pressure operation and suction of the air mass flow from the air conveyor for vacuum operation through the line 3.
  • the air conveying unit of the conditioning system 4 is at a constant Operated speed, the air mass flow is at least equal to the maximum air consumption of the engine 1 is selected, preferably even significantly larger.
  • By throttling the air mass flow with that with an electronic regulator unoei ieii eytiwdppe wr as ee ungssys em from ⁇ ege ⁇ appe rur n- pressure unit down to the engine 1 to the desired air pressure.
  • this air pressure is lowered or raised step by step (stationary operation) or dynamically (dynamic operating state).
  • the current pressure in the piping system behind the control valve 14 is measured by an absolute pressure sensor in the line 3 and converted into an electrical signal proportional to the pressure. This signal is transmitted to the control valve 14 as the actual signal.
  • the controller is set by an automation system or manually. By comparing this actual signal with the desired value set by the user, a control signal taking into account the position of the control flap 14 is generated.
  • the position of the control flap 17 serves to keep the pressure difference between the intake air in line 3 and the exhaust gas in line 17 constant or, if necessary, the same.
  • the adjustment of the negative pressure in the line 3 can be supported by opening the control valve 16 in the connecting line to the dilution tunnel 8 of the CVS system 7, 8, 9.
  • the regulation of the air pressure by increasing the pressure in the conditioning 4 and / or larger opening of the control valve 14 in the line 3 to the engine 1.
  • the air conveyor of the conditioning 4 is operated at a constant speed, wherein the air mass flow is at least again the same size, advantageously even significantly greater than the maximum air consumption of the internal combustion engine 1.
  • the wide-open damper 14 with predominantly closed damper 16, the entire line system 3 to the engine 1 to the desired Raised air pressure.
  • the position of the control valves 14 and 16 for overpressure operation is again set by electronic controller.
  • the current pressure is measured by an absolute pressure sensor and converted into an electrical signal proportional to the pressure, which is transmitted to the controller for the control valves 14, 16 as an actual signal.
  • control flap 17 is also used here to keep the pressure difference between the intake air in line 3 and the exhaust gas in line 17 constant or if necessary also the same.
  • dampers can be used to increase or decrease this air pressure incrementally (stationary operation) or dynamic (dynamic operation mode).

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Engines (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Abstract

L'invention concerne un procédé permettant d'alimenter un moteur à combustion à interne en gaz de combustion. Dans ledit procédé, une quantité constante, sensiblement permanente, de gaz de combustion conditionné totalement par la pression, l'humidité, et/ou par la température est introduite, cette quantité correspondant à la quantité consommée à pleine charge, le gaz de combustion qui n'est pas utilisé, étant dévité du moteur à combustion intenre, et les gaz d'échappement dudit moteur sont mélangés avec un gaz diluant puis ils sont évacués de préférence dans un flux à volume constant. L'objectif de l'invention est de régler de la manière la plus flexible possible et de prédéfinir librement les conditions de pression dans et autour du moteur ou des rapports de masse du flux d'aspiration, de dérivation et d'échappement, la proportion du gaz de combustion introduit dans le moteur à combustion interne étant régulée indépendamment de l'état de charge du moteur à combustion interne. A cet effet, le dispositif d'alimentation en gaz de combustion conditionné pour un moteur à combustion interne (1) comprend un tuyau d'alimentation (5) partant de l'installation de conditionnement (4) et dirigé vers le moteur à combustion interne (1). Ledit tuyau (5) est doté d'un raccordement (11) situé autour du moteur à combustion interne (1). Un premier mécanisme (14) de régulation du débit est placé entre le raccordement (11) et le moteur à combustion interne (1).
PCT/AT2007/000455 2006-09-28 2007-09-27 Procédé et dispositif pour alimenter un moteur à combustion interne en gaz de combusion conditionné WO2008036993A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM708/2006 2006-09-28
AT0070806U AT8868U3 (de) 2006-09-28 2006-09-28 Verfahren und vorrichtung zur versorgung einer verbrennungsmaschine mit konditioniertem verbrennungsgas

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WO2008036993A2 true WO2008036993A2 (fr) 2008-04-03
WO2008036993A3 WO2008036993A3 (fr) 2008-07-31

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295950A1 (fr) 2009-09-09 2011-03-16 Control Sistem S.r.l. Dispositif et procédé de conditionnement altimétrique de moteurs à combustion interne
AT510676A3 (de) * 2012-01-23 2012-12-15 Avl List Gmbh Vorrichtung zur versorgung einer verbrennungsmaschine mit konditioniertem verbrennungsgas
CN103392121A (zh) * 2011-01-31 2013-11-13 瓦伦西亚理工大学 对往复式内燃机吸入的空气的压力和温度进行模拟的单元
WO2015110683A1 (fr) 2014-01-24 2015-07-30 Universitat Politècnica De València Dispositif de conditionnement d'atmosphère pour l'essai de moteurs à combustion, procédé et utilisation connexes
EP3249376A4 (fr) * 2015-01-21 2018-08-15 Universidad Politécnica de Valencia Dispositif destiné à conditionner l'atmosphère dans des essais de moteurs à combustion interne alternatifs, procédé et utilisation dudit dispositif
AT525576A4 (de) * 2021-10-21 2023-05-15 Avl List Gmbh Vorrichtung und Verfahren zur Abgasmessung an einem Prüfling

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105699089B (zh) * 2016-03-25 2018-01-12 吉林大学 一种快速压缩定容燃烧机构
AT520886B1 (de) * 2018-01-24 2019-11-15 Avl List Gmbh Prüfstand für einen Prüfling

Citations (5)

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Publication number Priority date Publication date Assignee Title
GB525186A (en) * 1938-04-07 1940-08-22 Zd Y Ringhoffer Tatra As Improved arrangements for blowers for air cooled internal combustion engines
KR20010058055A (ko) * 1999-12-24 2001-07-05 이계안 블로바이가스 메타기와 흡입 파이프를 연결하는 접속구
WO2002042730A2 (fr) * 2000-11-22 2002-05-30 Avl List Gmbh Procede pour l'alimentation d'un moteur a combustion interne en gaz de combustion conditionne, dispositif pour l'execution de ce procede, procede pour la determination des quantites de polluants dans les gaz d'echappement d'un moteur a combustion interne et dispositif pour l'execution de ce procede
US20040255653A1 (en) * 2002-06-25 2004-12-23 Daifuku Co., Ltd. Apparatus for detecting compression top dead center of an engine
AT8089U2 (de) * 2005-08-11 2006-01-15 Avl List Gmbh Verfahren zur abgasmessung bei verbrennungsmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB525186A (en) * 1938-04-07 1940-08-22 Zd Y Ringhoffer Tatra As Improved arrangements for blowers for air cooled internal combustion engines
KR20010058055A (ko) * 1999-12-24 2001-07-05 이계안 블로바이가스 메타기와 흡입 파이프를 연결하는 접속구
WO2002042730A2 (fr) * 2000-11-22 2002-05-30 Avl List Gmbh Procede pour l'alimentation d'un moteur a combustion interne en gaz de combustion conditionne, dispositif pour l'execution de ce procede, procede pour la determination des quantites de polluants dans les gaz d'echappement d'un moteur a combustion interne et dispositif pour l'execution de ce procede
US20040255653A1 (en) * 2002-06-25 2004-12-23 Daifuku Co., Ltd. Apparatus for detecting compression top dead center of an engine
AT8089U2 (de) * 2005-08-11 2006-01-15 Avl List Gmbh Verfahren zur abgasmessung bei verbrennungsmaschinen

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2295950A1 (fr) 2009-09-09 2011-03-16 Control Sistem S.r.l. Dispositif et procédé de conditionnement altimétrique de moteurs à combustion interne
CN103392121A (zh) * 2011-01-31 2013-11-13 瓦伦西亚理工大学 对往复式内燃机吸入的空气的压力和温度进行模拟的单元
US9038578B2 (en) 2011-01-31 2015-05-26 Universidad Politecnica De Valencia Unit for simulating the pressure and temperature conditions of the air drawn in by a reciprocating internal combustion engine
AT510676A3 (de) * 2012-01-23 2012-12-15 Avl List Gmbh Vorrichtung zur versorgung einer verbrennungsmaschine mit konditioniertem verbrennungsgas
AT510676B1 (de) * 2012-01-23 2014-05-15 Avl List Gmbh Vorrichtung zur versorgung einer verbrennungsmaschine mit konditioniertem verbrennungsgas
WO2015110683A1 (fr) 2014-01-24 2015-07-30 Universitat Politècnica De València Dispositif de conditionnement d'atmosphère pour l'essai de moteurs à combustion, procédé et utilisation connexes
US10379002B2 (en) 2014-01-24 2019-08-13 Universitat Politécnica De Valencia Device for atmosphere conditioning for testing combustion engines, and associated method and use
EP3249376A4 (fr) * 2015-01-21 2018-08-15 Universidad Politécnica de Valencia Dispositif destiné à conditionner l'atmosphère dans des essais de moteurs à combustion interne alternatifs, procédé et utilisation dudit dispositif
US10684195B2 (en) 2015-01-21 2020-06-16 Universidad Politecnica De Valencia Device for conditioning the atmosphere in tests of alternative internal combustion engines, method and use of said device
AT525576A4 (de) * 2021-10-21 2023-05-15 Avl List Gmbh Vorrichtung und Verfahren zur Abgasmessung an einem Prüfling
AT525576B1 (de) * 2021-10-21 2023-05-15 Avl List Gmbh Vorrichtung und Verfahren zur Abgasmessung an einem Prüfling

Also Published As

Publication number Publication date
AT8868U3 (de) 2007-10-15
WO2008036993A3 (fr) 2008-07-31
AT8868U2 (de) 2007-01-15

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