EP3803088A1 - Procede de commande d'injecteur air-essence d'un moteur a combustion interne - Google Patents
Procede de commande d'injecteur air-essence d'un moteur a combustion interneInfo
- Publication number
- EP3803088A1 EP3803088A1 EP19718755.2A EP19718755A EP3803088A1 EP 3803088 A1 EP3803088 A1 EP 3803088A1 EP 19718755 A EP19718755 A EP 19718755A EP 3803088 A1 EP3803088 A1 EP 3803088A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- injection
- soi
- cons
- pressure
- 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- Withdrawn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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
- F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
- F02B23/10—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder
- F02B23/101—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition with separate admission of air and fuel into cylinder the injector being placed on or close to the cylinder centre axis, e.g. with mixture formation using spray guided concepts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/02—Engines characterised by using fresh charge for scavenging cylinders using unidirectional scavenging
-
- 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
- F02D35/024—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure using an estimation
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
-
- 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
- F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
- F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
- F02D41/2425—Particular ways of programming the data
- F02D41/2429—Methods of calibrating or learning
- F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
- F02D41/2464—Characteristics of actuators
- F02D41/2467—Characteristics of actuators for injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
-
- 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
- F02D41/30—Controlling fuel injection
- F02D2041/3088—Controlling fuel injection for air assisted injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2400/00—Control systems adapted for specific engine types; Special features of engine control systems not otherwise provided for; Power supply, connectors or cabling for engine control systems
- F02D2400/04—Two-stroke combustion engines with electronic control
-
- 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
Definitions
- the invention relates to the field of transport and more particularly to applications comprising means for direct injection by air-fuel injector into an engine, in particular in a two-stroke engine. It finds an advantageous application in the form of a control method of an air-fuel injector of an internal combustion engine in a motor vehicle equipped with such a motorization device.
- One of the aims of the invention is to overcome at least some of the disadvantages of the prior art by providing an air-fuel injector control method of an engine, in particular a two-stroke engine, as well as a management module. afférent and a motor, in particular two-stroke, with air-fuel injection comprising said management module.
- the invention proposes a method of controlling an air-fuel injector in a combustion chamber of an engine, in particular two-stroke, said method comprising:
- the mixture dosage is controlled according to the load and the engine speed, which allows a reduction in fuel consumption, without having a pressure sensor in the combustion chamber.
- said at least one consolidated instruction for controlling the injection of air is the consolidated instruction of air injection duration and / or the consolidated setpoint of the air injection start angle. This characteristic makes it possible to calculate the corrected instructions both for opening and for closing the air injection.
- said at least one control setpoint of the air injection is saturated by said at least one consolidated instruction for controlling the injection of air.
- This characteristic makes it possible in a simple way not to overvalue the consolidated control instructions of the air injection and makes it possible to reduce the fuel consumption by the right dosage of the mixture.
- said substep of estimation of the compression pressure uses as input:
- the advantage of this feature is that it does not use a pressure sensor located in the combustion chamber.
- said estimate of the compression pressure is based on a polytropic compression hypothesis according to which the estimated compression pressure is a function of the measured plenum pressure, of an instantaneous volume of the combustion chamber calculated according to said angle set of air injection start, and a polytropic coefficient, which allows to accurately estimate the pressure in the combustion chamber according to actual current conditions.
- said polytropic coefficient is determined during a separate step of resetting on an engine comprising a pressure sensor in the combustion chamber. This characteristic makes it possible to obtain a simple and robust estimator of the combustion pressure.
- the method comprises a substep of calculation of the delays related to the backpressure which is involved in the calculation of said at least one consolidated instruction for controlling the injection of air and whose inputs are:
- said substep of calculation of the delays related to the backpressure comprises at least one table or at least one polynomial equation having for input said counterpressure at the nose of the injector which is the difference between the result of said sub-step of estimating the compression pressure and the result of the high-pressure air measurement step, and output the delays related to the back pressure, which allows to take into consideration, in a simple and automatic way, without extra cost in calculation time, the real conditions of use, including weather conditions.
- the invention relates to a module for managing the air-fuel injection in a combustion chamber of an engine, notably a two-stroke engine, comprising:
- This management module has advantages similar to those of the method.
- said air injection control setpoint calculation means comprises a saturator by at least one consolidated instruction for controlling the injection of air.
- the invention also relates to an engine, in particular two-stroke, with air-fuel injection of a motor vehicle comprising a management module according to the invention characterized in that it comprises a plenum pressure measurement sensor located in a downstream plenum a low pressure compressor and upstream of the combustion chamber and a high-pressure air measurement sensor located downstream of a high-pressure compressor.
- a management module according to the invention characterized in that it comprises a plenum pressure measurement sensor located in a downstream plenum a low pressure compressor and upstream of the combustion chamber and a high-pressure air measurement sensor located downstream of a high-pressure compressor.
- FIG. 1 shows a diagram of an engine according to the invention.
- FIG. 2 is an exemplary flow chart suitable for implementing the method according to the invention.
- substantially means that a slight deviation may be admitted with respect to a given nominal position or orientation, for example “substantially vertical” means that a difference of the order of 10 ° relative to a strictly vertical orientation is allowed within the scope of the invention.
- substantially vertical means that a difference of the order of 10 ° relative to a strictly vertical orientation is allowed within the scope of the invention.
- FIG. 1 schematically represents a two-stroke MOT motor with unidirectional through-flow (of the Anglosaxon term "uniflow") with direct injection with air-fuel injector lnj_Air_Ess with valve according to the invention.
- the unidirectional through flow designation is used because the air flow passes through the cylinder through lights positioned at the bottom of the barrel to the S_Ech exhaust valves housed in the cylinder head and flushes the residual flue gases.
- an air-fuel premix is made in the injector chamber (not shown) and then injected by opening a premix valve in the combustion chamber of the engine during the compression phase. .
- the supply of high-pressure gasoline is done by a high-pressure gas pump Pp_Ess_HP and the high-pressure air supply comes from a high-pressure air compressor Cp_Air_HP,
- This MOT motor also includes a spark plug.
- ignition B_AII which is spaced G air-gas injector lnj_Air_Ess an angle of for example 30 °, and both of which open into the combustion chamber Ch_Comb in which the piston Pi slides.
- a low pressure air compressor Cp_Air_BP opens into a Plenum Pim with a pressure sensor C_P0 and overlooking the Ch_Comb combustion chamber via a light. Two exhaust valves are also shown.
- the cycle of a one-way direct-injection two-stroke MOT motor with injector lnj_Air_Ess air-gasoline valve comprises two linear movements of the piston Pi incorporating the operations of admission, compression, combustion and exhaust.
- a cycle engine per lap is therefore performed, it breaks down into a driving part during which the piston Pi is initially at the top dead center, the candle triggers the "combustion” and then a relaxation work is performed during the descent of the piston Pi.
- the piston Pi opens the intake ports near the bottom dead center and thanks to the low-pressure air compressor Cp_Air_BP, the air enters the cylinder.
- the Pi piston compresses fresh air and flushes the exhaust gases S_Ech exhaust gases.
- FIG. 2 shows an exemplary flow chart suitable for implementing the method according to the invention.
- This method of controlling the air-fuel injector lnj_Air_Ess in the combustion chamber Ch_Comb of the two-stroke engine comprises:
- a step of calculating two consolidated instructions for controlling the injection of air by said injector that is the consolidated air injection duration instruction Tl and the consolidated SOI air injection start setpoint
- This step of calculating consolidated orders Tl, SOI for controlling the injection of air comprises:
- said substep E_Pcomp for estimating the compression pressure uses as input:
- the polytropic coefficient k is determined independently during a separate step of resetting on an engine comprising a pressure sensor in the combustion chamber. Indeed, this separate step is a development step which is done upstream and which makes it possible to determine the values of the polytropic coefficient k as a function of the plenum pressure conditions by using the same equation and by measuring the different plenum and compression by means of sensors during compression, prior to combustion. Thanks to this step, the compression pressure estimator Pcomp is simple, it comprises either a tabulation or a polynomial equation, with for entries:
- the sub-step E_offset delay calculation comprises at least one table or at least one polynomial equation thus having for input said back pressure, which is the result of the subtraction of the high-pressure air pressure PHP measured at the pressure estimated compression Pcomp.
- the outputs are thus preferably an angular advance to the opening offset_SOI in degree of crankshaft and an icorrective delay of opening time offset_TI in microseconds.
- these values can be stored as a polynomial because the associated curves are polynomial.
- These values of corrective terms of the dead time at the opening T emps m 0rt _Opening and closing T e mpsm 0 rt_ _Closing of the premixing valve of the air-gasoline air injector are also recorded in table form or in the form of tables polynomial, the corrections being linear according to the engine speed.
- the tabulated form that is to say in the form of a table, is preferentially chosen because it allows a simple and light recording and does not require computing power. Indeed, this method is hosted in a management module which preferably belongs to the engine computer or it already manages many functions.
- a control setpoint of the air injection Cons_SOI, Cons_DOI is saturated by the said at least one consolidated control instruction of the air injection Tl, SOI. In this case it is not replaced by the consolidated value but is saturated by the consolidated value.
- the invention applies in a nonlimiting manner to a two-stroke engine with air-fuel injection of a motor vehicle comprising a management module as described and comprising a plenum pressure measurement sensor located in a plenum downstream of a low pressure compressor and upstream of the combustion chamber and a high-pressure air measurement sensor located downstream of a high-pressure compressor. This engine makes it possible to dispense with pressure sensor in the combustion chamber and thus to gain in reliability and durability while controlling the dosing of the mixture.
- the invention as claimed relates to a method of controlling an air-fuel injector in a combustion chamber of an engine without a pressure sensor in said combustion chamber and an air-injection injection management module. fuel in a combustion chamber of an engine without a pressure sensor in said combustion chamber.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Fuel-Injection Apparatus (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1854811A FR3081934B1 (fr) | 2018-06-04 | 2018-06-04 | Procede de commande d'injecteur air-essence d'un moteur a combustion interne |
| PCT/EP2019/060623 WO2019233675A1 (fr) | 2018-06-04 | 2019-04-25 | Procede de commande d'injecteur air-essence d'un moteur a combustion interne |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3803088A1 true EP3803088A1 (fr) | 2021-04-14 |
Family
ID=62952140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19718755.2A Withdrawn EP3803088A1 (fr) | 2018-06-04 | 2019-04-25 | Procede de commande d'injecteur air-essence d'un moteur a combustion interne |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3803088A1 (fr) |
| CN (1) | CN112654777B (fr) |
| FR (1) | FR3081934B1 (fr) |
| RU (1) | RU2752526C1 (fr) |
| WO (1) | WO2019233675A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| PL449948A1 (pl) * | 2024-10-04 | 2025-05-12 | Europegas Spółka Z Ograniczoną Odpowiedzialnością | Metoda pomiaru korekcji czas wtrysku gazu dla elektromagnetycznych wtryskiwaczy gazu i wyliczania zużycia benzyny i gazu w samochodowych instalacjach gazowych dla benzynowych silników spalinowych z bezpośrednim wtryskiem benzyny |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0384473B1 (fr) * | 1989-02-22 | 1994-08-03 | Yamaha Hatsudoki Kabushiki Kaisha | Moteur à combustion interne avec ensemble d'injection de carburant |
| US20070250255A1 (en) * | 2006-04-24 | 2007-10-25 | Gm Global Technology Operations, Inc. | Method and apparatus for determining piston position in an engine |
| DE102004008234B4 (de) * | 2003-02-20 | 2017-05-24 | Denso Corporation | Kraftstoffeinspritzsystem |
| EP2923057B1 (fr) * | 2012-11-21 | 2018-02-28 | Westport Power Inc. | Étalonnage et émondage d'injecteur de carburant |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020195086A1 (en) * | 1997-12-16 | 2002-12-26 | Beck N. John | Cylinder pressure based optimization control for compression ignition engines |
| JP3798741B2 (ja) * | 2002-09-09 | 2006-07-19 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
| JP4103774B2 (ja) * | 2003-10-31 | 2008-06-18 | 株式会社デンソー | 内燃機関の燃料噴射制御装置 |
| JP4134910B2 (ja) * | 2004-01-16 | 2008-08-20 | トヨタ自動車株式会社 | 内燃機関の燃料噴射制御装置 |
| DE102004038121B3 (de) * | 2004-08-05 | 2006-06-01 | Siemens Ag | Verfahren und Vorrichtung zum Steuern einer Brennkraftmaschine |
| DE102010038779A1 (de) * | 2010-08-02 | 2012-02-02 | Robert Bosch Gmbh | Verfahren zum Betreiben einer Brennkraftmaschine mit mehreren Brennräumen und Brennkraftmaschine mit mehreren Brennräumen |
| US10288031B2 (en) * | 2013-11-14 | 2019-05-14 | Toyota Jidosha Kabushiki Kaisha | Controller for internal combustion engine |
-
2018
- 2018-06-04 FR FR1854811A patent/FR3081934B1/fr active Active
-
2019
- 2019-04-25 CN CN201980041972.6A patent/CN112654777B/zh active Active
- 2019-04-25 RU RU2020142795A patent/RU2752526C1/ru active
- 2019-04-25 WO PCT/EP2019/060623 patent/WO2019233675A1/fr not_active Ceased
- 2019-04-25 EP EP19718755.2A patent/EP3803088A1/fr not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0384473B1 (fr) * | 1989-02-22 | 1994-08-03 | Yamaha Hatsudoki Kabushiki Kaisha | Moteur à combustion interne avec ensemble d'injection de carburant |
| DE102004008234B4 (de) * | 2003-02-20 | 2017-05-24 | Denso Corporation | Kraftstoffeinspritzsystem |
| US20070250255A1 (en) * | 2006-04-24 | 2007-10-25 | Gm Global Technology Operations, Inc. | Method and apparatus for determining piston position in an engine |
| EP2923057B1 (fr) * | 2012-11-21 | 2018-02-28 | Westport Power Inc. | Étalonnage et émondage d'injecteur de carburant |
Non-Patent Citations (1)
| Title |
|---|
| See also references of WO2019233675A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112654777B (zh) | 2023-04-28 |
| CN112654777A (zh) | 2021-04-13 |
| FR3081934B1 (fr) | 2020-05-08 |
| WO2019233675A1 (fr) | 2019-12-12 |
| RU2752526C1 (ru) | 2021-07-30 |
| FR3081934A1 (fr) | 2019-12-06 |
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