EP2307690B1 - Moteur à combustion interne et procédé pour faire fonctionner un moteur à combustion interne de ce type - Google Patents

Moteur à combustion interne et procédé pour faire fonctionner un moteur à combustion interne de ce type Download PDF

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Publication number
EP2307690B1
EP2307690B1 EP09772382A EP09772382A EP2307690B1 EP 2307690 B1 EP2307690 B1 EP 2307690B1 EP 09772382 A EP09772382 A EP 09772382A EP 09772382 A EP09772382 A EP 09772382A EP 2307690 B1 EP2307690 B1 EP 2307690B1
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EP
European Patent Office
Prior art keywords
sensor
temperature
combustion engine
internal combustion
gas flow
Prior art date
Legal status (The legal status 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 status listed.)
Not-in-force
Application number
EP09772382A
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German (de)
English (en)
Other versions
EP2307690A1 (fr
Inventor
Wolfgang Mai
Paul Rodatz
Rudolf Bierl
Stephan Heinrich
Manfred Weigl
Andreas Wildgen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Automotive GmbH
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Continental Automotive GmbH
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Publication date
Application filed by Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2307690A1 publication Critical patent/EP2307690A1/fr
Application granted granted Critical
Publication of EP2307690B1 publication Critical patent/EP2307690B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • 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
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
    • F02D41/0035—Controlling the purging of the canister as a function of the engine operating conditions to achieve a special effect, e.g. to warm up the catalyst
    • F02D41/0037—Controlling the purging of the canister as a function of the engine operating conditions to achieve a special effect, e.g. to warm up the catalyst for diagnosing the engine
    • 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
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0809—Judging failure of purge control system

Definitions

  • the invention relates to an internal combustion engine and method for operating an internal combustion engine.
  • a method of operating an internal combustion engine having at least one sensor for measuring a hydrocarbon content of a gas stream in a conduit comprises determining a temperature at the at least one sensor. If the temperature is greater than a predetermined temperature, the gas flow through the line is interrupted.
  • the method may include evaluating a signal of at least one temperature sensor that has the at least one sensor.
  • the method may include evaluating a signal of at least one semiconductor device.
  • the semiconductor component is integrated in the at least one sensor. As a result, the temperature at the at least one sensor can be determined relatively easily.
  • the method may include shutting off at least one heating element having the at least one sensor for heating the gas flow.
  • a power supply of the at least one heating element can be interrupted.
  • the heating element can cause a fire of the hydrocarbon gas by a malfunction and by switching off or interrupting the power supply, this cause of fire can be eliminated.
  • the method may include closing at least one valve located upstream of the at least one sensor.
  • a method of operating an internal combustion engine includes determining a temperature at a temperature sensor.
  • the internal combustion engine has at least one sensor for measuring a hydrocarbon content of a gas stream in a line, and the at least one sensor has the temperature sensor.
  • An additional temperature is determined at a further temperature sensor of the at least one sensor. The temperature difference of the temperature and the further temperature is determined and the gas flow interrupted when the temperature difference is greater than a predetermined temperature difference.
  • the method may include closing at least one valve disposed upstream of the at least one sensor.
  • the method may include shutting off the at least one heating element having the at least one sensor for heating the gas flow.
  • the power supply of the at least one heating element can be interrupted. Thereby, a fire cause, for example, a malfunction of the heating element, are turned off.
  • An internal combustion engine comprises at least one sensor for measuring a hydrocarbon content of a gas stream in a pipe.
  • the internal combustion engine has a comparison device for comparing a temperature at the sensor with a predetermined temperature.
  • the internal combustion engine comprises at least one valve for interrupting the gas flow, which is arranged upstream of the at least one sensor. The at least one valve is controlled by the comparison device, so that the gas flow through the line is interrupted when the temperature is higher than the predetermined temperature.
  • the at least one sensor may have at least one heating element for heating a gas flow and at least one temperature sensor.
  • the temperature sensor can be used to determine the temperature at the sensor.
  • the comparison device may be part of a motor control with which the sensor is coupled. As a result, a fire can be detected effectively, and countermeasures can be controlled by the comparison device or the engine control.
  • FIG. 10 shows an internal combustion engine 100 having a fuel tank 106, an internal combustion engine 114, and a hydrocarbon tank 108.
  • fuel 107 is stored in the fuel tank 106.
  • Gaseous hydrocarbons 109 may be directed from the fuel tank in the hydrocarbon tank via a conduit 111 coupled to the fuel tank 106 and the hydrocarbon tank 108.
  • the hydrocarbon tank is coupled via a line 110 to the internal combustion engine 114, in particular the intake tract of the internal combustion engine.
  • the line 110 has a valve 103 and a further valve 104 as well as a hydrocarbon sensor 101 and a further hydrocarbon sensor 102.
  • the hydrocarbon sensors are configured to measure a hydrocarbon content of a gas stream. It can also be arranged only one hydrocarbon sensor, it can also be arranged more hydrocarbon sensors, for example, two or more hydrocarbon sensors.
  • the hydrocarbon sensors can also be arranged on further lines, for example the line 111.
  • the valves are designed to interrupt the gas flow. It can also be arranged only one valve, it can also be arranged more valves, for example, two or more valves.
  • the valves can also be arranged on other lines, such as the line 111.
  • the valve 103 is coupled via an electrical line 113 to the engine controller 105, the sensors 101 and 102 are coupled via an electrical line 112 to the engine controller.
  • the engine controller 105 which has a comparator 116, controls the valves and can evaluate signals from the sensors.
  • the fuel 107 such as a gasoline
  • hydrocarbons such as methane, butane or propane volatilize.
  • the different hydrocarbon chains have different evaporation temperatures, so that different hydrocarbons are released from the liquid fuel 107 depending on the outside temperature. The higher the outside temperature and thus the temperature of the fuel 107, the more hydrocarbons pass into the gas phase.
  • the tank 106 in which the fuel 107 is stored, is gas-tight.
  • the fuel cap gas-tightly closes a filler neck of the fuel tank.
  • the hydrocarbon-containing gas mixture that forms in the tank 106 is fed via the line 111 into the hydrocarbon tank 108.
  • the hydrocarbon tank may contain an activated carbon storage element.
  • the evaporated hydrocarbons are taken up by the activated carbon, stored and released again when needed. If the hydrocarbon tank has taken up a certain amount of hydrocarbons, it can be drained via line 110.
  • air is blown into the hydrocarbon tank from the outside via a valve 115, which receives the hydrocarbons.
  • the hydrocarbon-containing air may be used as intake air for the engine 114, thereby contributing to combustion in the engine. Since a certain amount of energy is supplied by the hydrocarbons in the intake air to the engine, is injected with less fuel via an injection system. To control this ratio, the hydrocarbon content of the supplied air is measured via the sensors 101 and 102.
  • Sensors for measuring a hydrocarbon content include, for example, a heating element for heating a gas flow and a temperature sensor.
  • the sensor is integrated on a silicon chip. The flowing past the sensor element gas stream is heated and based on signals from the temperature sensor, which are evaluated by the engine control, the thermal conductivity or the heat capacity of the gas flowing past can be determined. From this, the concentration of the hydrocarbon in the gas can be determined, since this is proportional to the thermal conductivity or heat capacity of the gas.
  • the hydrocarbon-containing gas in the line 110 may ignite.
  • the comparison device 116 which is part of the engine control 105 in the embodiment shown, compares a respective temperature at the hydrocarbon sensors with a predetermined temperature, which was determined representative of a fire. If the comparison device determines that the temperature determined at the sensor element is above the predetermined temperature, it can take measures. To prevent a supply of further flammable gas to the fire, the gas supply is interrupted. This can be done by closing the valve 103 or the valve 104.
  • valve 115 can also be closed, the valve 115 and thereby the emptying of the hydrocarbon tank can be stopped. If a fire is detected on the sensor 101, the valve 103 can be closed and the valve 104 remain open. If a fire is detected on the valve 102, either only the Valve 104 are closed or the valve 103 and 104 are closed.
  • the power supply to the sensor is interrupted.
  • FIG. 2 shows a sensor 200 and a valve 204, which are arranged in a line 206.
  • a gas 205 is performed in line 206.
  • the sensor 200 has a temperature sensor 201 and a further temperature sensor 203, which are each arranged on one side of a heating element 202.
  • the sensor 200 is configured to measure the concentration of hydrocarbon in the gas 205.
  • the valve 204 may terminate the conduit 206 so that no gas passes through the valve.
  • the sensor 200 may be coupled to a comparison device, which is part of an engine control of an internal combustion engine, for example.
  • the sensor 200 is integrated, for example, on a silicon substrate and may comprise further elements, for example an evaluation circuit or an analog-to-digital converter.
  • the gas 205 flowing past the sensor 200 is heated by the heating element 202 in a defined manner.
  • the temperature sensor 201 which is located upstream of the heating element, detects the temperature of the gas flow before the gas flow is heated, the further temperature sensor 203, which is arranged downstream of the heating element 202, detects the temperature of the heated gas. About a difference of these temperatures can be concluded that the heat capacity of the gas.
  • the content of hydrocarbons in the gas 205 can be determined.
  • the comparison device may compare the temperature of the temperature sensor 201 with a predetermined temperature.
  • the comparison device may instead or additionally compare the temperature of the further temperature sensor 203 with a predetermined temperature.
  • the comparison device can also compare the temperature difference between the two measured temperatures with a predetermined temperature difference.
  • the predetermined temperature or the predetermined temperature difference represents an upper limit of the temperature which occurs during normal operation of the sensor 200.
  • a higher temperature than the predetermined temperature suggests a fire of gas 205 in line 206.
  • a higher temperature difference than the predetermined temperature difference indicates a fire of gas 205 in line 206. If the comparison device determines a higher temperature than the predetermined temperature or a higher temperature difference than the predetermined temperature difference, it can regulate the valve 204 in such a way that no additional gas can reach the sensor 200.
  • the power supply to the sensor 200 in particular to the heating element 202, be interrupted in order to eliminate a possible cause of fire.
  • a fire causing malfunction such as sparking, turned off and thus prevents the faulty sensor triggers another fire.
  • a first step S1 of a method for operating an internal combustion engine the start takes place, which can be close to a start of the internal combustion engine.
  • a temperature is determined on at least one sensor.
  • the sensor is a sensor for Measurement of a hydrocarbon content of a gas stream in the internal combustion engine.
  • a third step S3 the determined temperature is compared with a predetermined temperature and it is determined whether the determined temperature is greater than the predetermined temperature. If the specific temperature is not greater than the predetermined temperature, the process continues with step S2. If the specific temperature is greater than the predetermined temperature, the gas flow in the line is interrupted in step S4.
  • a heating element of the sensor can be switched off and / or the power supply of the heating element or the sensor can be interrupted.
  • the determination of the temperature at the at least one sensor in step S2 can be carried out by evaluating a signal of a temperature sensor.
  • the temperature sensor is, for example, a semiconductor component which is integrated in the at least one sensor.
  • a first temperature is determined by a temperature sensor of the at least one sensor in step S2.
  • a further temperature is determined by a further temperature sensor of the at least one sensor and a temperature difference of the temperature and the further temperature is determined.
  • the temperature difference is compared with a predetermined temperature difference and it is determined whether the temperature difference is greater than the predetermined temperature difference. If this is the case, in step S4, for example, a valve is closed to interrupt a gas flow, and / or the sensor is turned off. If the temperature difference is not greater than the predetermined temperature difference, step S2 is continued.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)

Claims (13)

  1. Procédé pour faire fonctionner un moteur à combustion interne, qui comporte au moins un capteur (101) de mesure d'une teneur en hydrocarbure d'un courant gazeux dans un conduit (110), le conduit conduisant le courant gazeux d'une cuve (106) dans une cuve (108) à hydrocarbure et dans lequel la cuve à hydrocarbure est couplée par le conduit à une aspiration d'un moteur (114) à combustion, dans lequel
    - on détermine une température sur le au moins un capteur (101) ;
    - on interrompt le courant gazeux passant dans le conduit (110) lorsque la température est supérieure à une température prescrite.
  2. Procédé suivant la revendication 1, dans lequel : on exploite un signal d'au moins un capteur (203) de température, qu'a le au moins un capteur (101 ; 200).
  3. Procédé suivant la revendication 1 ou 2, dans lequel : on exploite un signal d'au moins un composant à semi-conducteur, qui est intégré dans le au moins un capteur (101).
  4. Procédé suivant l'une des revendications 1 à 3, dans lequel : on met à l'arrêt au moins un élément (202) de chauffage, que le au moins un capteur (101 ; 200) a pour chauffer le courant gazeux.
  5. Procédé suivant l'une des revendications 1 à 4, dans lequel : on interrompt une alimentation en courant électrique du au moins un élément (202) de chauffage.
  6. Procédé suivant l'une des revendications 1 à 5, dans lequel : on ferme au moins une vanne (103 ; 204) qui est montée en amont du au moins un capteur (101).
  7. Procédé pour faire fonctionner un moteur à combustion interne suivant la revendication 1, dans lequel
    - on détermine une température sur un capteur (203) de température du au moins un capteur (101 ; 200) ;
    - on détermine une autre température sur un autre capteur (201) de température du au moins un capteur (101 ; 200) ;
    - on détermine une différence de température entre la température et l'autre température ;
    - on interrompt le courant gazeux sur le au moins un capteur (101 ; 200), lorsque la différence de température est plus grande qu'une différence de température prescrite.
  8. Procédé suivant la revendication 7, dans lequel : on ferme au moins une vanne (103) qui montée en amont du au moins un capteur (101).
  9. Procédé suivant la revendication 7 ou 8, dans lequel : on met à l'arrêt au moins l'élément (202) de chauffage, que le au moins un capteur (101 ; 200) a pour chauffer le courant gazeux.
  10. Procédé suivant l'une des revendications 7 à 9, dans lequel : on interrompt une alimentation en courant électrique du au moins un élément (202) de chauffage.
  11. Moteur (100) à combustion interne comprenant :
    - au moins un capteur (101) de mesure d'une teneur en hydrocarbure d'un courant gazeux dans un conduit (100), le conduit conduisant le courant gazeux d'une cuve (106) dans une cuve (108) à hydrocarbure et la cuve à hydrocarbure étant couplée par le conduit à une aspiration d'un moteur (114) à combustion ;
    - un dispositif (116) de comparaison pour comparer une température sur le capteur (101) à une température prescrite ;
    - au moins une vanne (103) d'interruption du courant gazeux, qui est montée en amont du au moins un capteur (101) et qui est réglée par le dispositif de comparaison de manière à interrompre le courant gazeux passant dans le conduit lorsque la température est plus haute que la température prescrite.
  12. Moteur à combustion interne suivant la revendication 11, dans lequel le au moins un capteur (101 ; 200) a au moins un élément (202) de chauffage pour chauffer un courant gazeux et au moins un capteur (203) de température.
  13. Moteur à combustion interne suivant la revendication 11 ou 12, dans lequel le dispositif de comparaison fait partie d'une commande (105) de moteur.
EP09772382A 2008-07-04 2009-06-29 Moteur à combustion interne et procédé pour faire fonctionner un moteur à combustion interne de ce type Not-in-force EP2307690B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008031649A DE102008031649A1 (de) 2008-07-04 2008-07-04 Brennkraftmaschine und Verfahren zum Betreiben einer solchen Brennkraftmaschine
PCT/EP2009/058084 WO2010000682A1 (fr) 2008-07-04 2009-06-29 Moteur à combustion interne et procédé pour faire fonctionner un moteur à combustion interne de ce type

Publications (2)

Publication Number Publication Date
EP2307690A1 EP2307690A1 (fr) 2011-04-13
EP2307690B1 true EP2307690B1 (fr) 2012-11-21

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US (1) US8695573B2 (fr)
EP (1) EP2307690B1 (fr)
DE (1) DE102008031649A1 (fr)
WO (1) WO2010000682A1 (fr)

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Publication number Priority date Publication date Assignee Title
NZ554828A (en) 2004-12-06 2010-07-30 Washington Biotech Corp Medicine injection devices and methods
DE102008045322B4 (de) * 2008-09-02 2019-06-19 Continental Automotive Gmbh Anordnung zur Messung einer Kohlenwasserstoffkonzentration
DE102008060246A1 (de) * 2008-12-04 2010-06-17 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102010048311A1 (de) * 2010-10-14 2012-04-19 Continental Automotive Gmbh Verfahren und Vorrichtung zum Betreiben einer Brennkraftmaschine
DE102013209715A1 (de) * 2013-05-24 2014-11-27 Continental Automotive Gmbh Verfahren zur Durchbruchsüberwachung eines Speicherelementes
US10223798B2 (en) * 2016-05-27 2019-03-05 Intellijoint Surgical Inc. Systems and methods for tracker characterization and verification
US10378472B2 (en) * 2017-02-17 2019-08-13 Ford Global Technologies, Llc Hydrocarbon sensor diagnostic

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DE102008045322B4 (de) * 2008-09-02 2019-06-19 Continental Automotive Gmbh Anordnung zur Messung einer Kohlenwasserstoffkonzentration
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Also Published As

Publication number Publication date
DE102008031649A1 (de) 2010-01-14
WO2010000682A1 (fr) 2010-01-07
US8695573B2 (en) 2014-04-15
EP2307690A1 (fr) 2011-04-13
US20110174276A1 (en) 2011-07-21

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