EP3803086A1 - Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschine - Google Patents
Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschineInfo
- Publication number
- EP3803086A1 EP3803086A1 EP19724787.7A EP19724787A EP3803086A1 EP 3803086 A1 EP3803086 A1 EP 3803086A1 EP 19724787 A EP19724787 A EP 19724787A EP 3803086 A1 EP3803086 A1 EP 3803086A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- internal combustion
- combustion engine
- temperature
- delivery rate
- maximum delivery
- 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.)
- Granted
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
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/062—Introducing corrections for particular operating conditions for engine starting or warming up for starting
-
- 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
- F02D41/0002—Controlling intake air
-
- 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
- F02D2200/021—Engine temperature
-
- 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
- F02D2200/04—Engine intake system parameters
- F02D2200/0411—Volumetric efficiency
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
- F02D31/002—Electric control of rotation speed controlling air supply
- F02D31/006—Electric control of rotation speed controlling air supply for maximum speed control
-
- 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
- F02D41/0002—Controlling intake air
- F02D41/0007—Controlling intake air for control of turbo-charged or super-charged engines
Definitions
- the invention relates to a method for operating an internal combustion engine having at least one cylinder by fresh air is introduced during a cycle of the internal combustion engine to achieve a certain Solldauer- degree.
- the invention further relates to an internal combustion engine.
- the internal combustion engine has at least one combustion chamber, a suction tube, a compressor for generating a charge with a charge density in the intake manifold and a device for changing a delivery level of the charge from the intake manifold into the at least one combustion chamber.
- a part of the charge is transferred from the intake manifold into the at least one combustion chamber with a delivery rate, wherein the delivery rate is set as a function of the charge density.
- the degree of delivery is determined and set as a function of the air pressure prevailing in an environment of the internal combustion engine.
- document WO 2009/065541 A1 shows a method for regulating a stationary gas engine, in which a speed control deviation is calculated from a setpoint speed and an actual speed, from the speed control deviation via a speed controller as a manipulated variable a target torque is determined which is limited to an air ratio limiting torque via a torque limitation, and at from the limited target torque, a target volume flow for determining a mixture throttle angle and a throttle throttle angle is determined.
- the object of the invention is to propose a method for operating an internal combustion engine which has advantages over known methods, in particular allows operation of the internal combustion engine with low emissions, preferably during a warm-up operation of the internal combustion engine.
- the desired delivery rate is limited to a maximum delivery rate, which is set to a first default value when the internal combustion engine is started and increased in the direction of a second default value after the engine has started.
- the described method is used to operate the internal combustion engine.
- the internal combustion engine preferably serves to drive a motor vehicle, that is to say to provide a torque directed to the driving of the motor vehicle.
- the internal combustion engine has at least one cylinder, but preferably several cylinders. In the context of this description, only the at least one cylinder or the procedure relating to it is discussed. However, the embodiments are always transferable to the multiple cylinders of the internal combustion engine, if present, namely to each of the several cylinders. If there are several cylinders, the described method can therefore be implemented for each of the several cylinders.
- fresh gas is introduced into the cylinder, which consists entirely of fresh air or at least fresh air.
- the fresh gas from the fresh air and exhaust gas is composed, namely, if an exhaust gas recirculation is performed.
- the working cycle is composed of an intake stroke, a compression stroke, a power stroke and an exhaust stroke.
- the introduction of the fresh gas or the fresh air is usually carried out during the intake stroke.
- the introduction of the fresh air takes place such that after introduction into the cylinder there is a fresh air mass which corresponds to the desired delivery rate.
- a degree of delivery is to be understood as the ratio of the fresh air mass introduced into the cylinder divided by a theoretically possible fresh air mass, the latter being achievable with very slow intake, that is to say without negative pressure in the cylinder.
- the theoretically possible fresh air mass is determined on the basis of an ambient pressure and an ambient temperature which are present outside the internal combustion engine. The ambient pressure and the ambient temperature are independent of the operation of the internal combustion engine and its temperature.
- the internal combustion engine is operated with the desired delivery ratio or the target delivery rate is set on the internal combustion engine.
- the Solllie fergrad is set, for example, first to a Vorgabearrigrad that results from a specification of a driver of the motor vehicle and / or a rerassististenz Rhein the motor vehicle.
- the Vorgabearrigrad is determined from a default torque and / or based on an accelerator pedal position.
- the target delivery level is limited to the maximum delivery, in particular upwards, ie in the direction of larger values.
- the target delivery rate thus corresponds to the maximum delivery rate or is smaller than this.
- the maximum delivery rate is initially set to the first default value and increased after the start of the internal combustion engine in the direction of the second preset value.
- the second default value is greater than the first default value, so that at the start of the internal combustion engine initially a smaller maximum delivery rate exists.
- the maximum delivery rate is increased, namely in the direction of the second default value.
- the maximum delivery rate is increased such that the maximum delivery rate reaches the second preset value when the operating temperature is reached by the temperature of the internal combustion engine.
- Increasing the maximum delivery rate starting from the first default value in the direction of the second default value, in particular to the second default value, can in principle take place according to any desired course.
- the progression is linear, so increasing the maximum delivery rate as a function of a reference variable is linear.
- a reference for example, a temperature or the time is used.
- the desired delivery rate is a measure of the torque generated by the internal combustion engine or the power output by the internal combustion engine
- a default torque is preferably first determined, for example, from a specification of a driver of a motor vehicle to whose drive the internal combustion engine is used, or based on the specification of a driver assistance device.
- the default torque corresponds to that of the driver or the driver. rerassistenz Huawei desired torque.
- a setpoint torque is determined from the default torque and adjusted at the internal combustion engine.
- the internal combustion engine is operated such that it provides the target torque.
- the setpoint torque from the default torque
- a limitation to the maximum torque that can be provided above is now carried out. In other words, it is provided at the start of the internal combustion engine to limit the target torque to a smaller torque than in terms of time after starting.
- the internal combustion engine is preferably a spark-ignited internal combustion engine, that is to say in particular an Otto internal combustion engine.
- the maximum delivery rate In addition to setting the maximum delivery rate to the first default value at the start of the internal combustion engine and its subsequent enlargement in the direction of the second default value, it may be provided to limit the engine speed to a maximum speed, the maximum speed at the start of the engine Internal combustion engine is set to a first speed value and increased after the start of the internal combustion engine in the direction of a second speed value.
- the second rotational speed value preferably corresponds to a maximum permissible rotational speed of the internal combustion engine, which may be present during normal operation of the internal combustion engine after reaching the operating temperature, without damage to the internal combustion engine occurring or to be expected.
- a further embodiment of the invention provides that the maximum delivery rate is determined as a function of a temperature of the internal combustion engine, the maximum delivery rate being selected to be smaller at a lower temperature than at a higher temperature.
- the maximum delivery rate is insofar as a function of the temperature of the internal combustion engine, wherein the function has the temperature as an input variable and the maximum delivery as the output variable.
- a preferred further embodiment of the invention provides that a combustion chamber temperature of a combustion chamber of the cylinder is used as the temperature of the internal combustion engine.
- the combustion chamber temperature is to be understood as meaning the temperature within the combustion chamber, that is to say the temperature of a fluid present in the combustion chamber.
- the determination of the combustion chamber temperature can be effected, for example, by measuring by means of a sensor, in particular a sensor arranged in the combustion chamber, or by estimation.
- a temperature model is used, which determines the combustion chamber temperature from at least one other variable, in particular a measured temperature.
- the combustion chamber temperature is decisive for the amount of pollutant emissions which occur during operation of the internal combustion engine.
- the lower the combustion chamber temperature the higher the pollutant emissions.
- it is particularly advantageous to use the combustion chamber temperature for determining the maximum delivery rate because thus a particularly significant reduction in pollutant emissions is achieved.
- the temperature of the internal combustion engine used is an operating medium temperature of an operating medium of the internal combustion engine. Determining the combustion chamber temperature may be expensive. For this reason, it may be envisaged to use the operating medium temperature instead of the combustion chamber temperature.
- the temperature of the operating medium of the internal combustion engine is to be understood as the temperature of the operating medium.
- the operating medium temperature of the combustion chamber temperature runs after, so that also on the basis of the operating medium temperature, an adjustment of the maximum degree or the desired degree of delivery can be carried out in such a way that there is a significant reduction of the pollutant emissions.
- a cooling of the internal combustion engine, the nendes coolant or a lubrication of the engine, the nendes lubricant is used as operating means a cooling of the internal combustion engine, the nendes coolant or a lubrication of the engine, the nendes lubricant.
- the equipment is in this respect as a coolant or as a lubricant.
- the temperatures of both the coolant and the lubricant are comparatively easily determinable and are usually measured in each case.
- Both the temperature of the coolant and the temperature of the lubricant usually follow the combustion chamber temperature or are related to it. Increasing the combustion chamber temperature over a certain period of time usually also results in an increase in the operating medium temperature, that is to say the temperature of the coolant or of the lubricant. Accordingly, the temperature of the coolant or the temperature of the lubricant can be used in an advantageous manner to determine the maximum delivery rate such that there is a significant reduction in pollutant emissions.
- a further preferred embodiment of the invention provides that the maximum delivery rate starting from the first default value in dependence on the elapsed since the start of the internal combustion engine time in the direction of the second default value is increased.
- the target delivery rate should therefore be determined as a function of time, namely the time elapsed since the start of the internal combustion engine. If the maximum delivery rate is determined exclusively as a function of time, this is possible with very little effort. For example, the progression of the maximum delivery rate over time is selected such that the maximum delivery rate reaches the second setpoint value exactly or only when the temperature of the internal combustion engine corresponds to its operating temperature during proper operation of the internal combustion engine.
- the maximum delivery rate as a function of both the temperature and the time, so that the maximum delivery rate as a function of the temperature and the time is available.
- the function has as input variables the temperature and the time and as output variable the maximum delivery rate. This represents a particularly advantageous procedure in determining the maximum level of delivery.
- a further embodiment of the invention provides that the maximum delivery level is set by the temperature to the second preset value upon reaching an operating temperature.
- the operating temperature is that temperature of the internal combustion engine to understand, which has this in the context of a quasi-stationary operation.
- the internal combustion engine is thus operated such that the operating temperature is present.
- the internal combustion engine is cooled such that the temperature of the internal combustion engine corresponds to the operating temperature.
- a further embodiment of the invention provides that the second preset value corresponds to a max. len delivery level of the internal combustion engine corresponds.
- the maximum delivery rate corresponds to the degree of delivery which was present at maximum power or rated power of the internal combustion engine under the current ambient conditions.
- the maximum delivery rate is, for example, as a function of the ambient conditions, in particular as a function of the ambient pressure and / or the ambient temperature. Such a procedure ensures that the maximum torque or the maximum power can be called up when the internal combustion engine is at operating temperature.
- the maximum delivery level is determined from the ambient conditions, wherein the maximum delivery rate is determined by subtracting a difference value from the maximum delivery rate, the differential value starting from a at the start of the internal combustion engine present first difference value in the direction of a second difference value is reduced.
- the maximum delivery rate is determined from the ambient conditions.
- the maximum delivery rate is determined based on the maximum delivery grade less the difference. The maximum delivery rate is thus at most as large as the maximum delivery level, namely when the difference value is equal to zero. If the difference value is different from zero, then the maximum delivery rate is different from the maximum delivery rate, in particular it is smaller than this.
- the difference value which is used in determining the maximum delivery rate, is initially set to the first difference value when the internal combustion engine is started. After the start of the internal combustion engine, the difference value is reduced starting from the first difference value in the direction of the second difference value.
- the second difference value is preferably equal to zero, so that after reaching the second difference value by the difference value, the maximum delivery rate corresponds to the maximum delivery rate.
- the procedure described with reference to the differential value is a special embodiment of the procedure described, according to which the target delivery rate is limited to the maximum delivery rate is set at the start of the internal combustion engine to the first default value and increased after the start of the internal combustion engine in the direction of the second preset value. However, it can also be used as an alternative.
- the invention further relates to an internal combustion engine, in particular an internal combustion engine for carrying out the method according to the embodiments in the context of this description, wherein the internal combustion engine has at least one cylinder into which fresh air is introduced during a working cycle of the internal combustion engine to achieve a specific target delivery level. It is provided that the internal combustion engine is designed to limit the target delivery to a maximum delivery, which is set at a start of the internal combustion engine to a first default value and increased after the start of the internal combustion engine in the direction of a second default value.
- Figure a schematic representation of an internal combustion engine.
- the figure shows a schematic representation of an internal combustion engine 1, which has several cylinders 2 in the embodiment shown here.
- Each of the cylinders 2 has at least one inlet valve 3 and at least one outlet valve 4. Via each of the inlet valves 3, fresh gas can be supplied to the respective cylinder 2 from a fresh gas tract 5, whereas exhaust gas from each of the outlet valves 4 is exhausted.
- the exhaust gas is supplied to the intake valves 3 by means of a compressor 7, which is part of an exhaust gas turbocharger 8.
- the exhaust gas turbocharger 8 has a turbine 9, which is connected via an exhaust pipe 10, which is part of the exhaust gas tract 6, to the outlet valves 4 in terms of flow technology.
- Downstream of the turbine 9 may be an exhaust gas purification device 11, which has, for example, at least one catalytic converter.
- the internal combustion engine 1 is operated by means of a method according to which fresh air is introduced into at least one of the cylinders 2, preferably into each of the cylinders 2, during a working cycle of the internal combustion engine.
- the introduction of the fresh air into the cylinder 2 or the cylinder 2 takes place in such a way that a certain target delivery rate is achieved in the respective cylinder.
- the desired delivery rate is limited to a maximum delivery rate, namely upwards. This means that the target delivery level is always less than or equal to the maximum delivery rate.
- the maximum delivery rate is set at a start of the internal combustion engine 1 to a first default value and increased after the start of the internal combustion engine 1 in the direction of a second default value.
- the desired delivery rate at the start of the internal combustion engine, in particular during a warm-up operation of the internal combustion engine 1 is limited to smaller values than after reaching an operating temperature of the internal combustion engine by a temperature of the internal combustion engine. Accordingly, the pollutant emissions of the internal combustion engine during warm-up operation are significantly reduced.
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)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018209080.7A DE102018209080B3 (de) | 2018-06-07 | 2018-06-07 | Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine |
| PCT/EP2019/062323 WO2019233714A1 (de) | 2018-06-07 | 2019-05-14 | Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3803086A1 true EP3803086A1 (de) | 2021-04-14 |
| EP3803086B1 EP3803086B1 (de) | 2023-12-13 |
Family
ID=65638482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19724787.7A Active EP3803086B1 (de) | 2018-06-07 | 2019-05-14 | Verfahren zum betreiben einer brennkraftmaschine sowie entsprechende brennkraftmaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3803086B1 (de) |
| CN (1) | CN111108282B (de) |
| DE (1) | DE102018209080B3 (de) |
| WO (1) | WO2019233714A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102019129364A1 (de) * | 2019-10-30 | 2021-05-06 | Audi Ag | Verfahren zum Betreiben einer Brennkraftmaschine sowie entsprechende Brennkraftmaschine |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5520153A (en) * | 1995-04-28 | 1996-05-28 | Saturn Corporation | Internal combustion engine control |
| DE19758641B4 (de) | 1996-06-03 | 2006-04-27 | Nissan Motor Co., Ltd., Yokohama | Brennkraftmaschine mit einer Abschätzungsvorrichtung zur Abschätzung eines Druckes |
| DE60019984T2 (de) * | 1999-01-29 | 2006-02-23 | Toyota Jidosha K.K., Toyota | Saugluftsteuerungssystem für Brennkraftmaschine |
| DE10157616A1 (de) * | 2001-11-26 | 2003-06-05 | Ina Schaeffler Kg | Verfahren und Vorrichtung zum Gleichstellen der Füllung der Zylinder eines mehrzylindrigen Verbrennungsmotors |
| JP4581586B2 (ja) | 2004-09-17 | 2010-11-17 | トヨタ自動車株式会社 | 内燃機関システム及びこれを搭載する自動車並びに内燃機関の始動方法 |
| GB2435899B (en) * | 2006-03-06 | 2011-01-26 | Ford Global Tech Llc | Variable valve actuation for reduced CO emissions |
| DE102007056623B3 (de) | 2007-11-23 | 2009-05-20 | Mtu Friedrichshafen Gmbh | Verfahren zur Regelung eines stationären Gasmotors |
| US9399962B2 (en) * | 2011-11-09 | 2016-07-26 | Ford Global Technologies, Llc | Method for determining and compensating engine blow-through air |
| JP5409833B2 (ja) | 2012-03-19 | 2014-02-05 | 三菱電機株式会社 | 内燃機関のシリンダ吸入空気量推定装置 |
| DE102012014713A1 (de) * | 2012-07-25 | 2014-01-30 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben eines Verbrennungsmotors |
| US9334815B2 (en) * | 2014-03-26 | 2016-05-10 | GM Global Technology Operations LLC | System and method for improving the response time of an engine using model predictive control |
| DE102012024318A1 (de) | 2012-12-13 | 2014-06-18 | Volkswagen Aktiengesellschaft | Verfahren zum Betreiben einer Brennkraftmaschine |
| US9714617B2 (en) * | 2013-02-25 | 2017-07-25 | GM Global Technology Operations LLC | System and method for limiting a volumetric efficiency of an engine during engine cranking to reduce emission |
| DE102015216154A1 (de) * | 2015-08-25 | 2017-03-16 | Volkswagen Aktiengesellschaft | Startverfahren für eine Verbrennungskraftmaschine und Kraftfahrzeug |
| DE102017112690B4 (de) | 2016-06-09 | 2024-12-12 | Ford Global Technologies, Llc | System zum Steuern des Motordrehmoments bei gleichzeitigem Abschalten der Motorzylinder |
| DE102016218776A1 (de) * | 2016-09-29 | 2018-03-29 | Robert Bosch Gmbh | Verfahren zum Regeln einer Brennkraftmaschine |
-
2018
- 2018-06-07 DE DE102018209080.7A patent/DE102018209080B3/de active Active
-
2019
- 2019-05-14 CN CN201980004619.0A patent/CN111108282B/zh active Active
- 2019-05-14 EP EP19724787.7A patent/EP3803086B1/de active Active
- 2019-05-14 WO PCT/EP2019/062323 patent/WO2019233714A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN111108282A (zh) | 2020-05-05 |
| WO2019233714A1 (de) | 2019-12-12 |
| DE102018209080B3 (de) | 2019-03-28 |
| CN111108282B (zh) | 2022-07-22 |
| EP3803086B1 (de) | 2023-12-13 |
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