CN110594024A - Method and control device for operating a reciprocating piston internal combustion engine - Google Patents
Method and control device for operating a reciprocating piston internal combustion engine Download PDFInfo
- Publication number
- CN110594024A CN110594024A CN201910503521.1A CN201910503521A CN110594024A CN 110594024 A CN110594024 A CN 110594024A CN 201910503521 A CN201910503521 A CN 201910503521A CN 110594024 A CN110594024 A CN 110594024A
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- China
- Prior art keywords
- combustion engine
- internal combustion
- load
- reciprocating piston
- speed
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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
- F02D15/00—Varying compression ratio
-
- 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
-
- 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
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention relates to a method for operating a reciprocating piston internal combustion engine with a variable compression ratio, wherein the reciprocating piston internal combustion engine is operated at a high compression ratio from idling speed to maximum speed and at low to medium load, and is operated at a low compression ratio from idling speed to medium speed and from medium to maximum load, wherein the reciprocating piston internal combustion engine is operated at a high compression ratio from medium speed and from medium to maximum load. The specific power during stoichiometric combustion is increased by the operation of the reciprocating piston internal combustion engine according to the invention. The invention also relates to a control device.
Description
Technical Field
The invention relates to a method for operating a reciprocating piston internal combustion engine.
Background
For the technical context of internal combustion engines with variable compression ratios, reference is made, for example, to german laid-open document DE102016200190a 1. The publication describes a method for the functional monitoring of a device for variably adjusting the cylinder compression of a reciprocating piston internal combustion engine. The method comprises the following steps:
-determining a value of a motor parameter indicative of the position of the combustion engine at a defined cylinder compression,
-comparing the sought value with another value of the motor parameter, and
-based on the result of said comparison,
-determining: the device for variably setting the cylinder compression functions correctly.
In addition, reference is made to German laid-open document DE10010032487A 1. A method for operating a reciprocating piston internal combustion engine of a motor vehicle is also known from the publication. In this reciprocating piston internal combustion engine, the compression ratio of at least one cylinder in which the piston is received in a translatably guided manner can be adjusted by means of an adjusting device corresponding to this cylinder. In this case, the control device checks a predefined functionality by means of at least one detection device. If, by means of the check, it is determined that the detected actual functionality deviates from the predefined functionality, the control device is switched from normal operation to a fault operation.
In addition, reference is made to the patent application published under the number WO2016/016,191A 1. In this patent application, a method for operating a reciprocating piston internal combustion engine is described, in which the effective length of a connecting rod in a cylinder is adjusted, wherein a compression ratio which can be adjusted thereby is changed at least during operation of the reciprocating piston internal combustion engine and is coordinated with at least one further component of the reciprocating piston internal combustion engine.
The compression ratio of the gasoline internal combustion engine is limited due to abnormal combustion in a low load range. During this time, a system that enables the compression ratio to be adjusted during operation of the internal combustion engine is described as indicated above. Typically, the system is used to adjust the high compression ratio in the low load range to improve efficiency and the low compression ratio in the high load range to improve combustion robustness, to thereby maintain a small boost pressure requirement or an early combustion center of gravity position.
Only a small expansion of the working gas occurs due to the low compression ratio and therefore an increased exhaust gas temperature occurs compared to the expansion at the high compression ratio. A relatively early combustion center of gravity position also occurs at low compression ratios. This results in measures for reducing the full load lubrication (for example the miller combustion method) or the water injection only having limited potential.
Disclosure of Invention
The object of the invention is to provide a measure with which the exhaust gas temperature can be reduced at medium to high loads and from medium to high rotational speeds.
To this end, the invention proposes a method for operating a reciprocating piston internal combustion engine with a variable compression ratio, wherein the reciprocating piston internal combustion engine
From idling speed up to maximum speed and at low to medium load, at a high compression ratio, and
running at a low compression ratio from idling speed up to medium speed and from medium load up to maximum load,
wherein the reciprocating piston type internal combustion engine
Operating at a high compression ratio from the medium rotational speed up to the maximum rotational speed and from the medium load up to the maximum load.
The invention also proposes a control device arranged for operating a reciprocating piston internal combustion engine with a variable compression ratio, wherein the control device is arranged to:
-operating the reciprocating piston internal combustion engine at a high compression ratio from idling speed up to maximum speed and at low to medium load,
-operating the reciprocating piston internal combustion engine at a low compression ratio from no load speed up to a medium speed and from medium load up to a maximum load, and
-operating the reciprocating piston internal combustion engine at a high compression ratio from a medium rotational speed up to a maximum rotational speed and from a medium load up to a maximum load.
The invention proposes the possibility of using a VCR (variable compression ratio) system in order to increase the compression ratio at full load and at high rotational speeds of the reciprocating piston internal combustion engine in the region close to full load, in order to reduce the exhaust gas temperature by expanding the expansion and thus also to increase the effect of the combustion process (for example the miller combustion process or the water injection) in terms of reducing the exhaust gas temperature or reducing the lubrication.
The method according to the invention makes it possible to increase the ratio of the internal combustion engine during stoichiometric combustion (λ ═ 1)Power or reduced water consumption in combustion processes with water injection. This results in a substantial reduction of CO2Emissions and helps to comply with RDE regulations (Real Driving Emissions). In addition, the method according to the invention, as shown above, leads to a reduction in water consumption, which brings itself to a significant user benefit (less replenishment of the water injection) or to a cost potential due to the reduction of the internal combustion engine application with water injection. At the same time, the method according to the invention results in a greatly reduced fuel consumption.
Drawings
The invention is explained in detail below with the aid of a single drawing.
Fig. 1 shows graphically an operating characteristic for an internal combustion engine.
Detailed Description
Fig. 1 shows a diagram of a conventional operating characteristic for a reciprocating piston internal combustion engine. The torque M of the internal combustion engine is shown on the Y axisd(in Nm). The rotational speed n (in 1/min) of the internal combustion engine is shown on the X-axis. The characteristic is divided into three general regions.
The first region 1 is derived from the minimum rotational speed n of the reciprocating-piston internal combustion engineminExtending up to the maximum speed n of the reciprocating piston internal combustion enginemaxAnd from the minimum torque MdminExtended approximately up to a medium torque Mdmittel。
In the diagram, the second region 2 is approximately at a medium torque MdmittelExtend up to maximum torque MdmaxAnd from the minimum rotational speed nminExtending approximately up to a medium speed nmittel。
In the diagram, the third region 3 is approximately rotated from the intermediate speed nmittelExtending up to a maximum speed nmaxAnd about a medium torque MdmittelExtend up to maximum torque Mdmax。
In the first region 1, the reciprocating piston internal combustion engine is operated at a high compression ratio, as is known from the prior art for increasing efficiency.
In the second region 2, the reciprocating piston internal combustion engine is operated at a low compression ratio to avoid abnormal combustion.
In the third zone 3, the internal combustion engine is operated according to the invention at a high compression ratio in order to achieve the advantages listed above.
The method according to the invention is therefore used for operating a reciprocating piston internal combustion engine with a variable compression ratio, wherein the reciprocating piston internal combustion engine
At low load MdminUntil medium load MdmittelFrom no load speed nminUp to a maximum speed nmaxThe operation is carried out at a high compression ratio,
from no load speed nminUp to a medium speed nmittelAnd from the medium load MdmittelUp to the maximum load MdmaxThe operation is carried out at a low compression ratio,
from medium speed nmittelUp to a maximum speed nmaxAnd from the medium load MdmittelUp to the maximum load MdmaxOperating at high compression ratios.
List of reference numerals
1.nminTo nmax、MdminTo MdmittelRange of (1)
2.nminTo nmittel、MdmittelTo MdmaxRange of (1)
3.nmittelTo nmax、MdmittelTo MdmaxRange of (1)
Claims (2)
1. Method for operating a reciprocating piston internal combustion engine with a variable compression ratio, wherein the reciprocating piston internal combustion engine
From no load speed nminUp to a maximum speed nmaxAnd at low load MdminUp to medium load MdmittelIs operated at a high compression ratio, and
from no load speed nminUp to a medium speed nmittelAnd from the medium load MdmittelUp to the maximum load MdmaxThe operation is carried out at a low compression ratio,
characterized in that the reciprocating piston internal combustion engine
From medium speed nmittelUp to a maximum speed nmaxAnd from the medium load MdmittelUp to the maximum load MdmaxOperating at high compression ratios.
2. Control arrangement arranged to operate a reciprocating piston internal combustion engine with a variable compression ratio, characterised in that the control arrangement is arranged to:
from no load speed nminUp to a maximum speed nmaxAnd at low load MdminUp to medium load MdmittelIn the case of operating the reciprocating piston internal combustion engine at a high compression ratio,
from no load speed nminUp to a medium speed nmittelAnd from the medium load MdmittelUp to the maximum load MdmaxOperating the reciprocating piston internal combustion engine at a low compression ratio, and
from medium speed nmittelUp to a maximum speed nmaxAnd from the medium load MdmittelUp to the maximum load MdmaxThe reciprocating piston internal combustion engine is operated at a high compression ratio.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018209384.9 | 2018-06-13 | ||
| DE102018209384.9A DE102018209384A1 (en) | 2018-06-13 | 2018-06-13 | Method for operating a reciprocating piston internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110594024A true CN110594024A (en) | 2019-12-20 |
| CN110594024B CN110594024B (en) | 2023-08-08 |
Family
ID=68724554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910503521.1A Active CN110594024B (en) | 2018-06-13 | 2019-06-12 | Method and control device for operating a reciprocating piston internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110594024B (en) |
| DE (1) | DE102018209384A1 (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1223319A1 (en) * | 2001-01-16 | 2002-07-17 | Nissan Motor Company, Limited | Combustion control system for spark ignition internal combustion engine with variable piston stroke characteristic mechanism and variable valve operating mechanism |
| US20040069254A1 (en) * | 2002-07-11 | 2004-04-15 | Nissan Motor Co., Ltd. | Compression ratio controlling apparatus and method for spark-ignited internal combustion engine |
| JP2004278334A (en) * | 2003-03-13 | 2004-10-07 | Toyota Motor Corp | Change control of compression ratio in internal combustion engine |
| JP2010159683A (en) * | 2009-01-08 | 2010-07-22 | Nissan Motor Co Ltd | Internal combustion engine |
| JP2010281249A (en) * | 2009-06-04 | 2010-12-16 | Honda Motor Co Ltd | Internal combustion engine equipped with exhaust supercharger |
| CN102207037A (en) * | 2010-03-31 | 2011-10-05 | 马自达汽车株式会社 | Spark-ignition engine control method and system |
| CN102483002A (en) * | 2010-03-29 | 2012-05-30 | 丰田自动车株式会社 | Control device for vehicle |
| JP2012193635A (en) * | 2011-03-15 | 2012-10-11 | Nissan Motor Co Ltd | Device for controlling variable compression ratio internal combustion engine |
| JP2014163251A (en) * | 2013-02-22 | 2014-09-08 | Mazda Motor Corp | Spark ignition type engine with turbosupercharger |
| JP2017044128A (en) * | 2015-08-26 | 2017-03-02 | 日産自動車株式会社 | Control device for engine |
| CN107849992A (en) * | 2015-07-30 | 2018-03-27 | 日产自动车株式会社 | Display device |
| CN109555615A (en) * | 2017-09-27 | 2019-04-02 | 马自达汽车株式会社 | Engine with booster |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004031288B4 (en) * | 2004-06-29 | 2017-07-13 | FEV Europe GmbH | Internal combustion engine with variable compression ratio and method for its operation |
| DE102010032487A1 (en) | 2010-07-28 | 2012-02-02 | Daimler Ag | Method for operating a reciprocating piston engine |
| MX2017001333A (en) | 2014-07-30 | 2017-10-02 | Nestec Sa | Dispenser with openable door. |
| DE102014018897B3 (en) * | 2014-12-17 | 2016-01-21 | Audi Ag | Method for operating an internal combustion engine with a multi-joint crank mechanism with adjustment of an eccentric shaft |
| DE102016200190A1 (en) | 2015-10-12 | 2017-04-13 | Robert Bosch Gmbh | Method and function monitoring device for monitoring the function of a device for the variable adjustment of a cylinder compression in a reciprocating internal combustion engine |
-
2018
- 2018-06-13 DE DE102018209384.9A patent/DE102018209384A1/en active Pending
-
2019
- 2019-06-12 CN CN201910503521.1A patent/CN110594024B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1223319A1 (en) * | 2001-01-16 | 2002-07-17 | Nissan Motor Company, Limited | Combustion control system for spark ignition internal combustion engine with variable piston stroke characteristic mechanism and variable valve operating mechanism |
| US20040069254A1 (en) * | 2002-07-11 | 2004-04-15 | Nissan Motor Co., Ltd. | Compression ratio controlling apparatus and method for spark-ignited internal combustion engine |
| JP2004278334A (en) * | 2003-03-13 | 2004-10-07 | Toyota Motor Corp | Change control of compression ratio in internal combustion engine |
| JP2010159683A (en) * | 2009-01-08 | 2010-07-22 | Nissan Motor Co Ltd | Internal combustion engine |
| JP2010281249A (en) * | 2009-06-04 | 2010-12-16 | Honda Motor Co Ltd | Internal combustion engine equipped with exhaust supercharger |
| CN102483002A (en) * | 2010-03-29 | 2012-05-30 | 丰田自动车株式会社 | Control device for vehicle |
| CN102207037A (en) * | 2010-03-31 | 2011-10-05 | 马自达汽车株式会社 | Spark-ignition engine control method and system |
| JP2012193635A (en) * | 2011-03-15 | 2012-10-11 | Nissan Motor Co Ltd | Device for controlling variable compression ratio internal combustion engine |
| JP2014163251A (en) * | 2013-02-22 | 2014-09-08 | Mazda Motor Corp | Spark ignition type engine with turbosupercharger |
| CN107849992A (en) * | 2015-07-30 | 2018-03-27 | 日产自动车株式会社 | Display device |
| JP2017044128A (en) * | 2015-08-26 | 2017-03-02 | 日産自動車株式会社 | Control device for engine |
| CN109555615A (en) * | 2017-09-27 | 2019-04-02 | 马自达汽车株式会社 | Engine with booster |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102018209384A1 (en) | 2019-12-19 |
| CN110594024B (en) | 2023-08-08 |
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