EP4594607A1 - Verfahren zum betreiben eines verbrennungsmotors nahe einer brenngrenze in bereich niedriger leistung - Google Patents
Verfahren zum betreiben eines verbrennungsmotors nahe einer brenngrenze in bereich niedriger leistungInfo
- Publication number
- EP4594607A1 EP4594607A1 EP23776633.2A EP23776633A EP4594607A1 EP 4594607 A1 EP4594607 A1 EP 4594607A1 EP 23776633 A EP23776633 A EP 23776633A EP 4594607 A1 EP4594607 A1 EP 4594607A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air ratio
- combustion air
- limit value
- cylinders
- cylinder
- 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.)
- Withdrawn
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/02—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with gaseous fuels
- F02D19/021—Control of components of the fuel supply system
- F02D19/023—Control of components of the fuel supply system to adjust the fuel mass or volume flow
- F02D19/024—Control of components of the fuel supply system to adjust the fuel mass or volume flow by controlling fuel injectors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0644—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being hydrogen, ammonia or carbon monoxide
-
- 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
- F02D41/008—Controlling each cylinder individually
-
- 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
- F02D41/008—Controlling each cylinder individually
- F02D41/0085—Balancing of cylinder outputs, e.g. speed, torque or 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
- F02D41/008—Controlling each cylinder individually
- F02D41/0087—Selective cylinder activation, i.e. partial cylinder operation
-
- 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
- F02D41/02—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
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
-
- 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
- F02D41/1497—With detection of the mechanical response of the engine
-
- 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
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
- F02D2041/1433—Introducing closed-loop corrections characterised by the control or regulation method using a model or simulation of the system
- F02D2041/1437—Simulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/06—Fuel or fuel supply system parameters
- F02D2200/0602—Fuel pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1012—Engine speed gradient
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1015—Engines misfires
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
Definitions
- the present invention relates to a method for operating an internal combustion engine, in particular a hydrogen engine, with a plurality of cylinders, and a control device for controlling an internal combustion engine, in particular a hydrogen engine, with a plurality of cylinders.
- combustion air ratio significantly greater than 1 is aimed for in order to avoid nitrogen oxide emissions and to improve the consumption and responsiveness of the engine.
- an excessive increase in the combustion air ratio can lead to possible combustion stability problems.
- throttled operation, cylinder suppression or corresponding control of a bypass valve although these measures cannot be clearly distinguished from one another.
- the combustion limit i.e. the range from which combustion instabilities can occur due to an excessively high combustion air ratio, cannot be clearly detected while the engine is running and measures to avoid this range can therefore usually only be initiated on the basis of boundary conditions determined during engine calibration. Disclosure of the invention
- An internal combustion engine that is operated with such a lean, homogeneous combustion process offers - unlike a stoichiometric combustion process - the advantage of being able to carry out quick torque interventions by adjusting the amount of fuel without having to take the inertia of an air system into account.
- torque-effective interventions via ignition control which are associated with efficiency disadvantages, can be reduced to a minimum.
- the so-called combustion limits of the fuel-air mixture are maintained, i.e. an excessively high combustion air ratio is avoided.
- this combustion limit is reached, the amount of fuel cannot be reduced further without generating combustion instabilities. Consequently, the torque must be adjusted using further measures, some of which reduce efficiency.
- the object of the invention is to propose a method or a system with which an improved idle control can be achieved while largely avoiding ignition angle interventions and making the best possible use of combustion limits.
- a method for operating an internal combustion engine, in particular a hydrogen engine, with several cylinders includes determining a combustion air ratio of the internal combustion engine, comparing the determined combustion air ratio with a predetermined lower limit value and an upper limit value, which corresponds to the combustion limit, and a Controlling the operation of the internal combustion engine through torque-effective measures in accordance with the following control cascade: a) adjusting cylinder-specific injection quantities of fuel based on a rail pressure signal of the internal combustion engine as soon as the determined combustion air ratio corresponds at most to the lower limit value in order to achieve equalization of the injection quantities of the cylinders, b) adjusting the cylinder-specific injection quantities of fuel based on the speed of the internal combustion engine as soon as the determined combustion air ratio is above the lower limit value and below the upper limit value in a transition area close to the combustion limit in order to take cycle fluctuations of the cylinders into account, c) switching off at least one cylinder and adjusting the cylinder-specific injection quantities of fuel distributed to the remaining cylinders according to measure
- the operation of the internal combustion engine by a method according to the invention in a low load area is characterized by a prioritization of torque-effective interventions within the specified control cascade in order to largely avoid measures that reduce efficiency.
- the execution of the individual possible interventions depends on a determined combustion air ratio of the engine, which is denoted by and indicates the mass ratio of air to fuel relative to the respective stoichiometric ratio.
- a combustion limit must be observed as the upper limit of the combustion air ratio, above which combustion instabilities could occur due to an excessively high proportion of air.
- a lower limit value with a sufficient safety distance from the burning limit is determined, with further discussion of a sensible selection of the lower limit value being discussed below.
- the fuel supply to the individual cylinders is controlled based on the rail pressure signal, which is previously marked with the measure or priority a).
- the combustion air ratio here is therefore richer or lower or equal to the lower limit.
- the function implemented in a control unit adjusts the amount of fuel supplied to cylinders with a fuel amount that deviates from the engine cylinder average to the average cylinder level. In particular, if the amount of fuel supplied is too small, the cylinder-specific combustion air ratio is too high, which is therefore closer to the combustion limit.
- FIG 4 shows an exemplary representation of a control device 44 for controlling an internal combustion engine, in particular a hydrogen engine, with several cylinders.
- the control unit has a rail pressure sensor input 46, a speed sensor input 48, a Computing unit 50 and several control outputs 52.
- the control unit 44 has several optional cylinder pressure inputs 54.
- the computing unit 50 is coupled to the inputs 46, 48 and 54 and the control outputs 52 and is designed to determine a combustion air ratio of the internal combustion engine and compare it with a predetermined lower limit value and an upper limit value.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022210136.7A DE102022210136A1 (de) | 2022-09-26 | 2022-09-26 | Verfahren zum Betreiben eines Verbrennungsmotors nahe einer Brenngrenze in Bereich niedriger Leistung |
| PCT/EP2023/076356 WO2024068525A1 (de) | 2022-09-26 | 2023-09-25 | Verfahren zum betreiben eines verbrennungsmotors nahe einer brenngrenze in bereich niedriger leistung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4594607A1 true EP4594607A1 (de) | 2025-08-06 |
Family
ID=88192293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23776633.2A Withdrawn EP4594607A1 (de) | 2022-09-26 | 2023-09-25 | Verfahren zum betreiben eines verbrennungsmotors nahe einer brenngrenze in bereich niedriger leistung |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4594607A1 (de) |
| CN (1) | CN119948250A (de) |
| DE (1) | DE102022210136A1 (de) |
| WO (1) | WO2024068525A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2641905A (en) * | 2024-06-17 | 2025-12-24 | Jcb Res | A controller |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011011337B3 (de) * | 2011-02-16 | 2012-02-16 | Iav Gmbh Ingenieurgesellschaft Auto Und Verkehr | Verfahren zur Zylindergleichstellung einer Mehrzylinder-Verbrennungskraftmaschine |
| JP5918702B2 (ja) * | 2013-01-18 | 2016-05-18 | 日立オートモティブシステムズ株式会社 | エンジンの制御装置 |
| DE102017215566A1 (de) * | 2017-09-05 | 2019-03-07 | Robert Bosch Gmbh | Verfahren zum Betreiben eines Verbrennungsmotors während eines Warmlaufens |
-
2022
- 2022-09-26 DE DE102022210136.7A patent/DE102022210136A1/de active Pending
-
2023
- 2023-09-25 CN CN202380068826.9A patent/CN119948250A/zh active Pending
- 2023-09-25 EP EP23776633.2A patent/EP4594607A1/de not_active Withdrawn
- 2023-09-25 WO PCT/EP2023/076356 patent/WO2024068525A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024068525A1 (de) | 2024-04-04 |
| DE102022210136A1 (de) | 2024-03-28 |
| CN119948250A (zh) | 2025-05-06 |
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