EP4115160A1 - Procede pour determiner des angles de fermeture des soupapes d'un moteur a combustion - Google Patents
Procede pour determiner des angles de fermeture des soupapes d'un moteur a combustionInfo
- Publication number
- EP4115160A1 EP4115160A1 EP21707341.0A EP21707341A EP4115160A1 EP 4115160 A1 EP4115160 A1 EP 4115160A1 EP 21707341 A EP21707341 A EP 21707341A EP 4115160 A1 EP4115160 A1 EP 4115160A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- intake
- exhaust valve
- determining
- acquired
- detection zone
- 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- Withdrawn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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/12—Testing internal-combustion engines by monitoring vibrations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/46—Component parts, details, or accessories, not provided for in preceding subgroups
-
- 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
- F02D41/2432—Methods of calibration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2800/00—Methods of operation using a variable valve timing mechanism
- F01L2800/09—Calibrating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/01—Absolute values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L2820/00—Details on specific features characterising valve gear arrangements
- F01L2820/04—Sensors
- F01L2820/041—Camshafts position or phase sensors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
-
- 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
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/14—Timing of measurement, e.g. synchronisation of measurements to the engine cycle
-
- 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
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
-
- 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
- One aspect of the invention relates to a method for determining the closing angles of the intake and exhaust valves of a combustion engine of a vehicle, in particular an automobile.
- a method of measurement by metrology is used. This is based on the direct reading of the distribution diagram using comparators positioned on the valve stem making it possible to record the value of the valve lift in mm and a graduated disc angularly positioned on the crankshaft for the angle reading in degrees. This measurement is carried out manually by an operator in the workshop. This information is therefore not systematic.
- this method requires a lot of time, specific material and must be adapted to each type of engine. It is sometimes even difficult to carry out this operation due to the lack of accessibility to the elements. Like any human intervention, it is also sensitive to the operator.
- the object of the invention is to overcome the drawbacks of the prior art by providing a method for determining the closing angles of the intake and exhaust valves of an internal combustion engine, the precision and robustness of which are improved.
- the invention thus relates, in its broadest sense, to a method for determining the closing angles of the intake and exhaust valves of an internal combustion engine, said method comprising the steps of:
- knock information formed for example by an acceleration signal transmitted by a knock detection sensor or else an accelerometer, makes it possible to determine the precise instant of closing the valves while s 'freeing from the chain of ribs and therefore makes it possible to gain in strength and precision.
- this process does not require human intervention, the result does not depend on the skills or even the experience of the operator. Knowing the precise instant of closing of the intake and exhaust valves of an engine helps ensure a robust calibration of a control law.
- the method for determining the closing angles of the intake and exhaust valves of an internal combustion engine according to an aspect of the invention may exhibit one or more additional characteristics among the following, considered individually or according to any technically possible combination.
- a maximum value representative of an inlet valve closure is selected in the detection zone
- a maximum value representative of an exhaust valve closure is selected in the detection area.
- the selection of a detection zone of at least one instant of valve closing is carried out by: comparing the curve representative of a standard deviation with a valve lift law theoretical intake and exhaust valve, or by windowing at least one raw signal acquired.
- the reiteration step is performed twenty-four times.
- the method comprises a step of applying to the selected maximum value, an operating clearance which is a function of hydraulic compression of a valve lifter.
- the applied threshold is between 70 and 90%.
- the acquired raw signal is formed by a frequency analysis of an acceleration signal.
- the raw signal acquired is an acceleration signal.
- the invention relates to a vehicle comprising a knock detection device and an engine control device constructed and arranged to implement the steps of the method for determining intake and exhaust valve closure angles of an internal combustion engine according to at least one of the aforementioned embodiments of the invention.
- the knock detection device is formed by a knock detection sensor or an accelerometer.
- FIG. 1 schematically illustrates an exemplary implementation of a method for determining intake and exhaust valve closing angles of an internal combustion engine according to one aspect of the invention.
- FIG. 2 schematically represents several engine cycle curves.
- FIG. 3 illustrates an enlargement of a detection zone of at least one valve closing instant shown in Figure 2.
- FIG. 4 schematically illustrates an exemplary implementation of a method for determining closing angles of the intake and exhaust valves of an internal combustion engine according to one aspect of the invention.
- FIG. 5 illustrates a law of angular passage between a valve closing instant and a valve lift.
- FIG. 6 schematically represents a vehicle constructed and arranged to implement a method for determining the closing angles of the intake and exhaust valves of an internal combustion engine according to one aspect of the invention
- FIG. 1 illustrates an exemplary implementation of a method 100 for determining closing angles of the intake and exhaust valves of an internal combustion engine in accordance with one aspect of the invention.
- FIG. 2 for its part, illustrates several engine cycle curves, in particular: an intake valve and theoretical exhaust valve lift law LT.
- This LT law comprises on the ordinate the stroke in millimeters of the valve lifts and on the abscissa the angle in degrees of positioning of the engine crankshaft.
- This LT law illustrates an engine cycle with a point low dead end PMB ADM intake, one top dead center combustion PMH COMB and one bottom dead center combustion PMB COMB; a curve representative of a raw signal S acquired by an engine knock detection device.
- This curve comprises on the ordinate of m / s2 and on the abscissa the angle in degree of positioning of the engine crankshaft; a curve representative of an AND standard deviation. This curve provides on the abscissa the angle in degrees of positioning of the engine crankshaft.
- Figure 3 shows an enlargement of the detection zone Z of at least one valve closing instant shown in Figure 2.
- the method 100 includes a step of acquiring 101 a raw signal S of two engine cycles.
- the raw signal S is acquired by a knock detection device.
- the acquired raw signal S can be an acceleration signal.
- the raw signal could be formed by a frequency analysis of an acceleration signal.
- the method 100 can be applied by an on-board vehicle computer.
- the knock detection device can for example be formed by a knock sensor with which most motor vehicle gasoline engines are equipped. Thus, there is no need to add an additional sensor.
- the knock detection device may be formed by an accelerometer.
- the method 100 further comprises a step of repeating 102 at least once the step of acquiring 101 a raw signal S of two engine cycles.
- This step of acquiring 101 a raw signal S of two engine cycles can for example be repeated twenty-four times so as to obtain a set of raw signals S representative of fifty engine cycles.
- the method 100 also includes a step of determining 103 a curve representative of a standard deviation AND of all the raw signals S acquired. Thus, the greater the number of iterations 102 of acquiring a raw signal S, the greater the robustness of the method 100 according to the invention.
- the method 100 further comprises a step of selecting 104 a detection zone Z of at least one valve closing instant on the curve representative of an ET standard deviation.
- the selection 104 of a zone Z for detecting at least one instant of valve closing can for example be carried out by comparing the curve representative of a standard deviation AND with a law of inlet valve lift and of LT theoretical exhaust valve. In fact, based on the theoretical LT intake valve and exhaust valve lift law, it is easy to determine a detection zone of at least an instant when the valves are closed. In this case, the detection zone of at least one valve closing instant of the LT law is applied to the ET standard deviation.
- the zone Z for detecting at least one instant of valve closing comprises in particular an instant of closing at the intake FA and an instant of closing at the inlet FE.
- the selection 104 of a zone Z for detecting at least one valve closing instant can be achieved by windowing at least one raw signal S acquired. This is because the knock detection device is subjected to all the noises generated by the engine and it is therefore useful to window the raw signal S acquired to determine the times when the valves close.
- the method 100 further comprises a step of applying 105 a threshold TH to the maximum noise level in the detection zone Z of at least one instant of valve closing.
- This threshold TH can for example be between 70 and 90%. More particularly, in the example illustrated, the applied TH threshold is of the order of 80%.
- the method 100 further comprises a step of selecting 106 at least one maximum value.
- Each of the maximum values V FA and VFE corresponds to a point intersection between the curve representative of an ET standard deviation and the applied TH threshold of 80%.
- the method 100 may further include a step of applying 107 to the selected maximum values, an operating clearance dependent on hydraulic compression of a valve lifter.
- This operating clearance can for example be of the order of 0.06mm. Taking this operating clearance into account makes it possible to avoid a measurement deviation and therefore a calibration. Without taking this operating clearance into account, this measurement deviation can, for example, reach 12 degrees from the angle of closure at the intake of the valves and 8 degrees of the angle of closure at the exhaust of the valves.
- this passing law provides the angular offset to be applied corresponding to 1 mm.
- the closing to the FE exhaust for an operating clearance equal to 1 mm is of the order of -150 degrees.
- the FA intake closure for an operating clearance equal to 1 mm is of the order of 70 degrees.
- the detection zone Z is shifted by -30 degrees.
- Figure 6 illustrates a vehicle provided with a combustion engine according to one aspect of the invention.
- the vehicle 1 comprises a knock detection device 2 and an engine control device 3 constructed and arranged to implement the steps of the method 100 for determining the intake and exhaust valve closing angles of a combustion engine internal according to one of the aspects of the invention.
- the raw signal S acquired by a knock detection device is a piston frequency signal.
- This frequency signal is acquired by the knock detection device 2, which can be formed by a knock detection sensor or in a different embodiment by an accelerometer.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2002205A FR3107956B1 (fr) | 2020-03-05 | 2020-03-05 | Procede pour determiner des angles de fermeture des soupapes d’un moteur a combustion |
| PCT/FR2021/050192 WO2021176153A1 (fr) | 2020-03-05 | 2021-02-03 | Procede pour determiner des angles de fermeture des soupapes d'un moteur a combustion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4115160A1 true EP4115160A1 (fr) | 2023-01-11 |
Family
ID=70154819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21707341.0A Withdrawn EP4115160A1 (fr) | 2020-03-05 | 2021-02-03 | Procede pour determiner des angles de fermeture des soupapes d'un moteur a combustion |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4115160A1 (fr) |
| CN (1) | CN115280124A (fr) |
| FR (1) | FR3107956B1 (fr) |
| WO (1) | WO2021176153A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1907583A1 (de) | 1968-02-19 | 1969-09-18 | Armour Ind Chem Co | Amin-Zwitterionen als Schmiermittel auf Wasserbasis |
| FR2787136A1 (fr) | 1998-12-11 | 2000-06-16 | Joel Bourdeau | Dispositif de variation de la distribution d'un moteur thermique a soupapes commandees |
| JP5395201B2 (ja) * | 2012-03-14 | 2014-01-22 | 三菱電機株式会社 | 内燃機関のノック制御装置 |
| CN204028693U (zh) * | 2014-07-24 | 2014-12-17 | 武汉市菱电汽车电子有限责任公司 | 一种汽车电喷系统电子控制单元的功能检测装置 |
| JP7125245B2 (ja) * | 2015-05-19 | 2022-08-24 | ヴィンタートゥール ガス アンド ディーゼル アーゲー | 大型ディーゼル機関を運転する方法、この方法の使用、及び大型ディーゼル機関 |
| CN107131060B (zh) * | 2017-05-09 | 2019-05-28 | 北京理工大学 | 一种基于动态缸压确定发动机气门开启关闭时刻的方法 |
-
2020
- 2020-03-05 FR FR2002205A patent/FR3107956B1/fr active Active
-
2021
- 2021-02-03 EP EP21707341.0A patent/EP4115160A1/fr not_active Withdrawn
- 2021-02-03 WO PCT/FR2021/050192 patent/WO2021176153A1/fr not_active Ceased
- 2021-02-03 CN CN202180019910.2A patent/CN115280124A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR3107956B1 (fr) | 2023-04-28 |
| WO2021176153A1 (fr) | 2021-09-10 |
| CN115280124A (zh) | 2022-11-01 |
| FR3107956A1 (fr) | 2021-09-10 |
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