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WO2017194570A1 - Procédé de détermination d'une teneur en eau dans les gaz d'échappement d'un système de propulsion - Google Patents

Procédé de détermination d'une teneur en eau dans les gaz d'échappement d'un système de propulsion Download PDF

Info

Publication number
WO2017194570A1
WO2017194570A1 PCT/EP2017/061106 EP2017061106W WO2017194570A1 WO 2017194570 A1 WO2017194570 A1 WO 2017194570A1 EP 2017061106 W EP2017061106 W EP 2017061106W WO 2017194570 A1 WO2017194570 A1 WO 2017194570A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
exhaust gas
content
electrolysis
water content
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.)
Ceased
Application number
PCT/EP2017/061106
Other languages
German (de)
English (en)
Inventor
Florian Stief
Markus Willimowski
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Priority to KR1020187035529A priority Critical patent/KR102256491B1/ko
Priority to CN201780029009.7A priority patent/CN109072799B/zh
Publication of WO2017194570A1 publication Critical patent/WO2017194570A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1454—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being an oxygen content or concentration or the air-fuel ratio
    • 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
    • F02D41/22—Safety or indicating devices for abnormal conditions
    • 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
    • F02M25/022—Adding fuel and water emulsion, water or steam
    • F02M25/025—Adding water
    • 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
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D2041/1472—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being a humidity or water content of the exhaust gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

Definitions

  • the present invention relates to a method for determining a
  • the present invention relates to a computer program that executes each step of the method when running on a computing device and to a machine-readable storage medium that stores the computer program. Finally, the invention relates to an electronic control device which is set up to carry out the method.
  • Air / fuel mixture changed various engine parameters. For example, thus the ignition timing can be changed in the engine.
  • the water is injected via a water injection, which is upstream of the
  • DE 10 2010 021 281 AI relates to a system for an exhaust gas sensor, for example, an oxygen sensor with an exhaust system of a
  • the document relates to a method in which the exhaust gas sensor, in addition to an amount of oxygen additionally indicates an amount of water in the fuel.
  • a pumping current can be varied, whereby it can be selected which of the above-mentioned components are determined.
  • the pumping current is increased, so that the amount of oxygen contained in water molecules can be measured by the exhaust gas sensor.
  • the method relates to a water injection system, as well as to an exhaust tract of a drive system in a motor vehicle.
  • the drive system comprises an internal combustion engine, as well as an intake tract and the aforementioned exhaust tract, both of which are connected to the internal combustion engine.
  • Exhaust tract downstream of the internal combustion engine at least one lambda sensor is arranged, with which it is possible to determine an amount of oxygen in the exhaust gas.
  • the water injection system is upstream of one
  • the water injection is turned off. This makes it possible to carry out a reference measurement of ambient humidity. Subsequently, the pumping voltage of the lambda sensor is increased, whereby an electrolysis of water vapor takes place. The water is split into hydrogen and oxygen. A resulting first oxygen content is now determined in the reference measurement by the lambda sensor and further calculates a nominal water quantity. This gives the current
  • a second oxygen content is determined, which is also caused by the electrolysis of the water, as described above.
  • This second oxygen content is composed of the first
  • Oxygen content which corresponds to the amount of water in the ambient air
  • oxygen which corresponds to the additional injected water.
  • Water has formed.
  • the water content is calculated from the difference and the nominal water quantity, which is determined from the reference measurement
  • provision may be made for using further measured quantities in order to achieve a desired water content in the
  • Water content and the above calculated water content in the exhaust gas can be determined too low and / or high water content in the exhaust gas.
  • a malfunction of the water injection system can be diagnosed.
  • these parameters are engine temperature, shutdown time and / or
  • the information is used to control the water injection. If the water content in the exhaust gas is too low, the water content in the exhaust gas is too low, the water content in the exhaust gas is too low, the
  • Water injection are readjusted accordingly and the injected amount of water can be increased. On the other hand, if the water content in the exhaust gas is too high, the water injection can be switched off. This allows the injected amount of water can be optimized via the water injection and adapted to the conditions of the motor vehicle.
  • Water injection to be informed a driver of the motor vehicle. This can then, for example, commission a review and possibly a repair in a workshop.
  • the actual measurement of the oxygen content resulting from the electrolysis of the water vapor is carried out at a plurality of predetermined operating points.
  • these differ by the predetermined injection quantities of water.
  • a maximum amount of water can be injected and an actual measurement can be performed.
  • the injected amount of water can be halved (half amount) and also an actual measurement can be performed. Forming the difference in each case from the full quantity with the nominal water quantity and from the half quantity with the nominal water quantity, the accuracy of the statements can be increased.
  • the operating parameters for a diagnosis are queried. If the operating parameters for a diagnosis are met, the procedure is initiated as described above. Otherwise the diagnosis will not be carried out.
  • operating points needed for diagnostics may be adjusted by an electronic controller should they not be powered up by the driver.
  • diagnosis can be started specifically.
  • the computer program is set up to perform each step of the method, in particular when it is performed on a computing device or controller. It allows the implementation of the method in a conventional electronic control unit without having to make any structural changes. For this it is on the machine-readable
  • the electronic control unit is obtained, which is adapted to control the determination of the water content in the exhaust gas by means of the method described above.
  • FIG. 1 schematically shows a drive system and an intake tract with water injection arranged thereon and an exhaust tract with the lambda sensor arranged therein, which can be controlled by means of the method according to the invention.
  • FIG. 2a shows a first part of a flow chart of a
  • FIG. 2b shows a second part of the flowchart, which is the continuation of the first part of FIG. 2a, of an embodiment of the invention
  • a drive system 100 is shown, the an internal combustion engine 110, and a Ansaug Statl20 and an exhaust tract 130, which with the
  • Combustion engine 110 are connected includes.
  • a water injection 121 is at the intake tract 120, upstream of the internal combustion engine 110 arranged. This injects a predetermined amount of water in the
  • At least one lambda sensor 131 is arranged downstream of the internal combustion engine 110, so that the exhaust gas flows past it. With the lambda sensor 131, it is possible to use a
  • the present embodiment of the method according to the invention discloses a possibility with this lambda sensor 131 also to measure a water content w in the exhaust gas.
  • An electronic control unit 140 is connected to the internal combustion engine 110, the water injection 121 and the lambda sensor 131 and can control and monitor them.
  • FIG. 2a shows a flow diagram of the embodiment of the method according to the invention.
  • an adaptation 200 of the lambda sensor 131 in the system is carried out at the beginning of the method.
  • the system it is possible for the system to perform a lambda control 202 in which the water content is varied by injecting the water injection 121 to adapt it to the conditions.
  • the method according to the invention it is provided that the
  • Lambda control 202 is completed, which is checked in a second step 201. If the lambda control 202 has not been completed, the method is ended 227. Furthermore, a query 203 of the
  • Water injection 121 by turning off 204 of these.
  • an increase 205 of the pump voltage UP of the lambda sensor 131 takes place.
  • a reference measurement 207 a first oxygen content is measured that has been produced by the electrolysis 206.
  • This first oxygen content is dependent on the ambient humidity or the water content due to external influences.
  • a nominal water quantity W can then be determined 208, which includes the influences mentioned above.
  • an injection 209 of a full amount is initiated. This means that the water injection 121 injects a maximum amount of water into the intake tract 120.
  • the second oxygen content comprises on the one hand the first
  • Injection 209 of the full amount of water has arisen.
  • a calculation 213 of the water content w in the exhaust gas can be carried out with the aid of this difference ⁇ and the nominal water quantity WN.
  • the method according to the invention provides, in addition to the actual measurement 211 of the full quantity, to examine a further quantity of water.
  • an injection 214 of a half amount corresponding to half the amount of water of the full amount initiated.
  • the injected half-amount is, by an electrolysis 215, according to the electrolysis 210, split into oxygen and hydrogen.
  • a second oxygen content is determined in the actual measurement 216 of the half-quantity.
  • a difference ⁇ of the actual measurement 216 and the reference measurement 207 is calculated 217.
  • This difference ⁇ is also used with the nominal water quantity W in order to determine the water content w in the exhaust gas.
  • a calculated water content w is thus determined.
  • a desired water content is determined where other measurands 219 are included.
  • These measurement variables 219 include, inter alia, an engine temperature, a shutdown time and an ambient temperature, as well as a triggering of the water injection 121.
  • the measurement variables 219 include, inter alia, an engine temperature, a shutdown time and an ambient temperature, as well as a triggering of the water injection 121.
  • Error memory entry 223 is applied and the process is terminated 227.
  • the process is terminated immediately 227.
  • the calculated water content w is certified in a query 225 of the malfunction and informed the driver 226. If there is no malfunction of the water injection 121, the process is terminated 227.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un procédé de détermination d'une teneur en eau (w) dans les gaz d'échappement d'un système de propulsion dans un véhicule automobile. Un système d'injection d'eau injecte de l'eau dans un mélange air/carburant. En outre, au moins une sonde lambda est disposée dans un système d'échappement du système de propulsion. Le procédé comporte les étapes ci-dessous. Tout d'abord, l'injection d'eau est arrêtée (204). Une électrolyse (206) de vapeur d'eau a lieu par élévation (205) d'une tension de pompage (UP) dans la sonde lambda. Dans une mesure de référence (207), une première teneur en oxygène, résultant de l'électrolyse (206) de la vapeur d'eau, des gaz d'échappement est déterminée (208) au moyen de la sonde lambda et une quantité nominale d'eau (WN) est déterminée à partir de celle-ci. Ensuite, une quantité d'eau prédéfinie est injectée (209, 213) dans le mélange air/carburant. Suite à celà, une mesure réelle (211, 216) est effectuée, dans laquelle une deuxième teneur en oxygène, résultant de l'électrolyse (210, 215), des gaz d'échappement est déterminée au moyen de la sonde lambda à un point de fonctionnement prédéfini. En outre, une différence (Δ) entre la deuxième teneur en oxygène et la première teneur en oxygène est calculée (212, 217) et celle-ci est utilisée conjointement avec la quantité nominale d'eau (WN) pour le calcul (213, 218) de la teneur en eau (w).
PCT/EP2017/061106 2016-05-12 2017-05-10 Procédé de détermination d'une teneur en eau dans les gaz d'échappement d'un système de propulsion Ceased WO2017194570A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020187035529A KR102256491B1 (ko) 2016-05-12 2017-05-10 구동 시스템의 배기가스 내 함수량을 결정하기 위한 방법
CN201780029009.7A CN109072799B (zh) 2016-05-12 2017-05-10 用于确定在驱动系统的废气中的水含量的方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016208161.6A DE102016208161A1 (de) 2016-05-12 2016-05-12 Verfahren zur Bestimmung eines Wassergehalts im Abgas eines Antriebsystems
DE102016208161.6 2016-05-12

Publications (1)

Publication Number Publication Date
WO2017194570A1 true WO2017194570A1 (fr) 2017-11-16

Family

ID=58692505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/061106 Ceased WO2017194570A1 (fr) 2016-05-12 2017-05-10 Procédé de détermination d'une teneur en eau dans les gaz d'échappement d'un système de propulsion

Country Status (4)

Country Link
KR (1) KR102256491B1 (fr)
CN (1) CN109072799B (fr)
DE (1) DE102016208161A1 (fr)
WO (1) WO2017194570A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10190541B2 (en) * 2016-12-19 2019-01-29 Ford Global Technologies, Llc Method and system for engine water injection
KR102202720B1 (ko) * 2019-08-19 2021-01-13 주식회사 현대케피코 물분사 인젝터 고장진단 방법 및 장치
DE102020206917A1 (de) 2020-06-03 2021-12-09 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Betreiben einer Brennkraftmaschine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682842A (en) * 1996-09-24 1997-11-04 Caterpillar Inc. Fuel control system for an internal combustion engine using an aqueous fuel emulsion
US20070277775A1 (en) * 2006-05-30 2007-12-06 James Robert Orlosky Combustion-steam engine
DE102010021281A1 (de) 2009-12-04 2011-06-09 Ford Global Technologies, LLC, Dearborn Detektion von Kraftstoffalkoholgehalt mittels eines Abgassensors
DE102011077353A1 (de) * 2011-06-10 2012-12-13 Continental Automotive Gmbh Kompensation einer Strom-Spannungs-Kennlinie einer Einzellen-Lambdasonde basierend auf einem gemessenen Gleichstromwiderstand
DE102014100411A1 (de) * 2013-01-18 2014-07-24 Ford Global Technologies, Llc Verfahren und Systeme zur Feuchtigkeitserkennung mittels eines Abgassensors
DE102015117147A1 (de) * 2014-10-17 2016-04-21 Ford Global Technologies, Llc Verfahren und Systeme zum Betrieb eines Sauerstoffsensors mit veränderlicher Spannung

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7877189B2 (en) 2005-11-30 2011-01-25 Ford Global Technologies, Llc Fuel mass control for ethanol direct injection plus gasoline port fuel injection
US9945310B1 (en) * 2016-12-19 2018-04-17 Ford Global Technologies, Llc Methods and system for adjusting engine water injection

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682842A (en) * 1996-09-24 1997-11-04 Caterpillar Inc. Fuel control system for an internal combustion engine using an aqueous fuel emulsion
US20070277775A1 (en) * 2006-05-30 2007-12-06 James Robert Orlosky Combustion-steam engine
DE102010021281A1 (de) 2009-12-04 2011-06-09 Ford Global Technologies, LLC, Dearborn Detektion von Kraftstoffalkoholgehalt mittels eines Abgassensors
DE102011077353A1 (de) * 2011-06-10 2012-12-13 Continental Automotive Gmbh Kompensation einer Strom-Spannungs-Kennlinie einer Einzellen-Lambdasonde basierend auf einem gemessenen Gleichstromwiderstand
DE102014100411A1 (de) * 2013-01-18 2014-07-24 Ford Global Technologies, Llc Verfahren und Systeme zur Feuchtigkeitserkennung mittels eines Abgassensors
DE102015117147A1 (de) * 2014-10-17 2016-04-21 Ford Global Technologies, Llc Verfahren und Systeme zum Betrieb eines Sauerstoffsensors mit veränderlicher Spannung

Also Published As

Publication number Publication date
CN109072799B (zh) 2022-02-15
DE102016208161A1 (de) 2017-11-16
CN109072799A (zh) 2018-12-21
KR102256491B1 (ko) 2021-05-26
KR20190006995A (ko) 2019-01-21

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