EP2102488A1 - Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interne - Google Patents
Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interneInfo
- Publication number
- EP2102488A1 EP2102488A1 EP07858083A EP07858083A EP2102488A1 EP 2102488 A1 EP2102488 A1 EP 2102488A1 EP 07858083 A EP07858083 A EP 07858083A EP 07858083 A EP07858083 A EP 07858083A EP 2102488 A1 EP2102488 A1 EP 2102488A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- engine
- candle
- heating
- plug
- 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- Withdrawn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
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/025—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs with means for determining glow plug temperature or glow plug resistance
-
- 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
- F02D35/025—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining temperatures inside the cylinder, e.g. combustion temperatures
-
- 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
- F02D41/042—Introducing corrections for particular operating conditions for stopping the engine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
- F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
- F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
- F02P19/021—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls
- F02P19/022—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs characterised by power delivery controls using intermittent current supply
Definitions
- the present invention relates generally to the supply of preheating plugs.
- It relates in particular to a method for controlling the power supply of an internal combustion engine preheating plug, to reach an ignition temperature with a view to starting a restart of the engine after stopping it. .
- the preheating plugs are used to reach a certain temperature in the combustion chamber, called the ignition temperature, so that the combustion reaction of the air and fuel mixture can take place. spontaneously when pressurizing the mixture.
- high-voltage preheating candle means a candle which is powered at a voltage equal to the voltage of the battery, and by low-voltage glow plug, a candle which is supplied at a voltage lower than the voltage of the battery. .
- low-voltage preheating spark plugs that take less time than high-voltage preheating spark plugs to reach the firing temperature. Indeed, during a rapid preheating phase, the low-voltage spark plugs will be supplied with overvoltage (at 11 volts), which causes a very rapid rise in temperature of the candle.
- the duration of the rapid preheat phase must be controlled to avoid overheating leading to deterioration of the candle.
- the present invention provides a novel method of controlling the supply of inexpensive preheating spark plugs and allowing a quick restart of the engine while maintaining the integrity of the candle.
- the invention proposes a method for controlling the power supply of an internal combustion engine preheating plug, to reach an ignition temperature in order to start a restart of the engine after stopping. of it, in which the following steps are provided: a) the temperature of the preheating plug is determined by a first mathematical model and as a function of the elapsed time of the engine stop, b) determined by a second mathematical model and according to the temperature of the pre-heating candle, the additional energy to bring to the pre-heating candle to reach the ignition temperature.
- each spark plug which still has a certain temperature following the stopping of the engine, can be powered to receive the additional energy to bring it to a temperature sufficient to perform a restart of the engine .
- This complementary energy is thus lower than the energy delivered to a cold candle, that is to say, whose temperature is minimal, which limits the risk of damaging the candle. The rapid restart of the engine is then allowed without deterioration of the candle.
- the method according to the invention thus makes it possible to avoid having to wait a certain period of time before being able to restart. It is also not necessary to use devices for measuring the temperature of the preheating candle. In addition, such a restart process makes it possible to obtain a restart of the engine in good thermodynamic conditions, which generates a good combustion of the mixture of air and fuel. Polluting emissions are thus limited.
- the first mathematical model is the characteristic law of temperature rise of the pre-heating candle.
- the second mathematical model is the characteristic law of descent in temperature of the pre-heating candle.
- the complementary energy is converted by a computer of the engine into a complementary heating time.
- the computer calculates from the time of complementary heating a factor of .
- the correction factor is also calculated as a function of the temperature of the combustion chamber of the engine.
- the reference heating time is the heating time to be applied to a preheating plug whose temperature has reached, after the motor has stopped, its minimum value, for to reach again the ignition temperature of the pre-heating candle.
- the pre-heating candle is a low-voltage supply pre-heating candle.
- step b) the determined additional energy is delivered to the electric voltage pulse pre-heating candle according to the pulse width modulation method.
- FIG. 1 is a diagram of the existing connections between a motor, motor candle supply means and a computer;
- FIG. 2 is a flow chart showing the various steps of the feeding method according to the invention.
- FIG. 3A is a graph representing the characteristic law of temperature descent of a candle
- FIG. 3B is a graph representing the characteristic law of temperature rise of a candle
- FIG. 4 is a graph showing the temperature of a candle as a function of the heating phases of this candle.
- FIG. 1 there is shown a diesel engine 1 internal combustion engine for a motor vehicle.
- the motor 1 comprises four pre-heating candles 2 with low voltage supply.
- An alternator 3 is linked to the engine 1 by a connection 3a.
- the candles 2 are each powered by a power supply control module 5 of the candles 2.
- calculator 6 controls the different organs of the engine in function Sensors (not shown) make it possible to determine engine operating parameters such as the temperature of the heat-transfer fluid Tfc, the temperature of the intake air Tair, the atmospheric pressure Patm, and the speed of rotation of the engine Vmot. These operating parameters of the motor are transmitted via a connection 8 to the control unit 6.
- the computer 6 comprises management means 7 of the supply control module 5 of the candles 2. It can be alternatively provided that the supply control module 5 of the candles 2 is integrated into the computer.
- the power control module 5 is controlled by the management module 7 of the computer 6 to deliver to the candles 2 a voltage according to the principle of pulse width modulation, also called Pulse Width Modulation (PWM).
- PWM Pulse Width Modulation
- the principle is the following. For a voltage U and a fixed period T, the time during which the voltage U is applied to the period T is varied.
- the cyclic opening ratio RCO (see FIG. 4), between 0 and 100%, is then defined. as the percentage between the duration during which the voltage U is applied to the period T and the duration of this period T.
- the opening RCO duty cycle applied for the supply of the spark plug is determined by the management module 7 as a function, in particular, of the temperature of the heat-transfer fluid Tfc, the temperature of the intake air Tair, the atmospheric pressure Patm, and the speed of rotation of the motor Vmot.
- the principle of the pulse-duration modulation makes it possible to increase the temperature of the candle while regulating this temperature, to avoid damaging the candles.
- An electric battery 4 supplies Ubat the power supply, the power control module 5 of the spark plugs 2 and the alternator 3.
- the computer 6 also receives other information such as a Pos_acc parameter representative of the position of the acceleration pedal via a connection 9, the available electric voltage Ubat supplied by the electric battery 4 via a connection 10 and a parameter la / d_alt representative of the state of activation or deactivation of the alternator 3 of the motor, via a connection 11.
- a Pos_acc parameter representative of the position of the acceleration pedal via a connection 9
- the available electric voltage Ubat supplied by the electric battery 4 via a connection 10
- a parameter la / d_alt representative of the state of activation or deactivation of the alternator 3 of the motor
- the computer receives as input a TaII temperature that the candles must provide, that is to say the ignition temperature.
- This ignition temperature TaII candles 2 can be determined by a map 12 from the parameters transmitted to the computer.
- j thermal behavior of each candle, as shown in Figures 3A and 3B, are known and are stored in the computer 6.
- the characteristic laws of the thermal behavior of each candle include a characteristic law of the temperature drop of the candle (FIG. 3A) and a characteristic law of the temperature rise of the candle (FIG. 3B):
- Tmbougie (t) Km + h. (1 -exp (-t / tm)), with t the time, Km the initial temperature of the candle, the temperature gain, tm the response time when the temperature of the candle is rising.
- Tdbougie (t) Kd. (Exp (-t / td)), with t the time, Kd the initial temperature of the candle, h the gain in temperature, and td the response time down the temperature of the candle.
- the parameters t, Km, Kd, h, tm, td are supplied by the candle manufacturer or are obtained during experimental tests. Thanks to the temperature drop curve of the candle, the computer has in memory the value of the cooling temperature of each candle.
- the cooling temperature of a candle is defined as the temperature of the candle when it is no longer powered for a time close to infinity. It is considered that this value of cooling temperature is reached at time td.
- the computer has in memory a map that determines the temperature Tcomb within the combustion chamber at each moment, depending on the speed and torque of the motor which are represented respectively by the parameters Vmot and Pos_acc.
- This mapping of the temperature of the combustion chamber which also corresponds to the temperature in the region surrounding the spark plug, can be obtained during engine validation tests, for example.
- the calculator can determine at any time the temperature of the candle.
- the process for controlling the supply of the pre-heating candle comprises several steps which are presented on the flowchart of FIG.
- the pre-heating and post-heating phases are controlled by the , candle supply, the percentage of cyclic opening ratio RCO applied as well as the corresponding application times, as illustrated in the graphs of FIG. 4.
- RCO percentage of cyclic opening ratio
- As shown in the flowchart of FIG. is initially in a sleep state (frame C1). This means that the calculator, the management module 7 of the candles and the alternator 3 are ready to execute instructions or to receive instructions.
- the computer detects, thanks to the parameter + APC which takes the value 1, that the contact is closed between the electric battery 4 and the electrical organs of the engine, it starts a preheating phase of the candles (C2 frame).
- the preheating phase comprises a first phase of rapid preheating followed by a second phase of even faster preheating and finally a phase of maintaining the heating.
- a preheat indicator goes out and the driver turns the ignition key to start the engine.
- the pre-heating phase is then followed by a specific heating phase implemented during the starting of the engine.
- a post-heating phase (C3 frame) is implemented after starting the engine.
- the heating of the spark plugs is stopped (frame C4).
- An additional heating phase can be implemented when the engine torque increases.
- the remainder of the description relates to the case of an untimely stop of the engine during the pre-heating step, considered as an example of implementation of the method according to the invention.
- the method as described above can be applied to any case of stopping the engine, regardless of its operating state. More generally, the method described below is applied in case of stopping the engine and when the driver wishes to restart the engine quickly.
- the computer When the computer detects the unexpected stop of the engine, it executes the steps detailed below.
- the driving method is described for a candle, but, of course, it applies in the same way to other candles.
- the calculator determines the time during which the spark plug has stopped heating as a result of stopping the engine, which amounts to calculating the elapsed time frame 5, it then compares this heating off time tarret_chauffage of the candle to the cooling time of the candle, considered to be the response time in thermal descent td of the candle. If the heating off time tarret_chauffage is greater than the thermal descent response time td, the candle has a so-called residual temperature greater than its cooling temperature and the feeding method according to the invention adapts the heating phases of the candle not to damage it, as explained below.
- the computer 6 determines the complementary energy Ecomp to provide the candle so that it reaches the ignition temperature TaII necessary to restart the engine.
- the computer determines in parallel (frame C8) the temperature Tcomb prevailing in the combustion chamber of the engine, as described above, using a map.
- the computer calculates a corrective time t_corr, to be applied to the complementary time t_comp to take into account the temperature in the combustion chamber Tcomb.
- This corrective time t_corr is obtained by mapping according to the temperature in the combustion chamber Tcomb.
- the calculator calculates the a so-called cold candle t_allfroid, that is to say a candle that has reached its cooling temperature, to obtain a heating time setpoint of t_chrap value: this correction factor is equal to t_chrap / t_allcroid report.
- the computer 6 also determines whether the stopping of the engine has occurred during a pre-heating phase or a post-heating phase. Here, as mentioned above, the stopping of the engine occurred during the pre-heating phase. The corrective factor t_corr is then applied to the preheating time.
- the heating off time tarret_chauffage of the determined spark plug is greater than the cooling time td of the spark plug, the heating time to be applied to the spark plug for a normal starting of the engine is not modified.
- the corrective factor is then equal to 1.
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)
- Ignition Installations For Internal Combustion Engines (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0611286A FR2910564B1 (fr) | 2006-12-22 | 2006-12-22 | Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interne |
PCT/EP2007/064472 WO2008077947A1 (fr) | 2006-12-22 | 2007-12-21 | Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interne |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2102488A1 true EP2102488A1 (fr) | 2009-09-23 |
Family
ID=38229274
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07858083A Withdrawn EP2102488A1 (fr) | 2006-12-22 | 2007-12-21 | Procede de pilotage de l'alimentation electrique d'une bougie de pre-chauffage de moteur a combustion interne |
Country Status (5)
Country | Link |
---|---|
US (1) | US7899609B2 (fr) |
EP (1) | EP2102488A1 (fr) |
JP (1) | JP2010531403A (fr) |
FR (1) | FR2910564B1 (fr) |
WO (1) | WO2008077947A1 (fr) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010001888A1 (fr) * | 2008-07-03 | 2010-01-07 | ボッシュ株式会社 | Procédé de commande d'actionnement pour bougie à incandescence |
DE102008040971B4 (de) * | 2008-08-04 | 2012-12-27 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Regeln der Temperatur von Glühstiftkerzen in einer Brennkraftmaschine |
GB2464128B (en) * | 2008-10-02 | 2013-07-31 | Gm Global Tech Operations Inc | Method for controlling a glow plug of a combustion machine of a vehicle and controller for a glow plug of combustion machine of a vehicle |
DE102009024138B4 (de) | 2009-06-04 | 2012-02-02 | Beru Ag | Verfahren zur Regelung der Temperatur einer Glühkerze |
JP5155964B2 (ja) | 2009-08-07 | 2013-03-06 | 日本特殊陶業株式会社 | グロープラグの通電制御装置及び発熱システム |
DE102009056261B4 (de) * | 2009-11-28 | 2012-04-26 | Beru Ag | Verfahren zum Aufheizen einer Glühkerze |
DE102010038337A1 (de) * | 2010-07-23 | 2012-01-26 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Steuerung des Glühverhaltens einer Glühstiftkerze eines Verbrennungsmotors |
EP2653714A4 (fr) * | 2010-12-16 | 2016-03-16 | Bosch Corp | Procédé de commande de l'activation d'une bougie de préchauffage, et appareil de commande de l'activation d'une bougie de préchauffage |
DE102011004514A1 (de) * | 2011-02-22 | 2012-08-23 | Robert Bosch Gmbh | Verfahren und Steuergerät zur Einstellung einer Temperatur einer Glühstiftkerze |
US9683536B2 (en) * | 2013-05-16 | 2017-06-20 | Ford Global Technologies, Llc | Enhanced glow plug control |
US20140338626A1 (en) * | 2013-05-16 | 2014-11-20 | Ford Global Technologies, Llc | Enhanced glow plug control |
US9850873B2 (en) | 2014-10-13 | 2017-12-26 | Allied Green Technologies, Inc. | Engine pre-heating system and method for multiple vehicles |
US10218702B2 (en) | 2015-11-09 | 2019-02-26 | Silvercar, Inc. | Vehicle access systems and methods |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5941673A (ja) * | 1982-09-01 | 1984-03-07 | Nippon Soken Inc | グロ−プラグ制御装置 |
DE3502966A1 (de) * | 1984-06-01 | 1985-12-05 | Robert Bosch Gmbh, 7000 Stuttgart | Einrichtung zur steuerung und regelung der temperatur einer gluehkerze |
JP2732066B2 (ja) * | 1988-05-12 | 1998-03-25 | 自動車機器株式会社 | グロープラグの通電制御方法 |
US5146881A (en) * | 1989-02-17 | 1992-09-15 | Pfefferle William C | Method of operating I.C. engines and apparatus thereof |
US4896636A (en) * | 1989-02-17 | 1990-01-30 | Pfefferle William C | Method of operating I. C. engines and apparatus thereof |
DE4041630A1 (de) * | 1990-12-22 | 1992-07-02 | Daimler Benz Ag | Verfahren zum aufheizen der ansaugluft bei brennkraftmaschinen mittels einer flammstartanlage |
DE10348391B3 (de) * | 2003-10-17 | 2004-12-23 | Beru Ag | Verfahren zum Glühen einer Glühkerze für einen Dieselmotor |
-
2006
- 2006-12-22 FR FR0611286A patent/FR2910564B1/fr not_active Expired - Fee Related
-
2007
- 2007-12-21 EP EP07858083A patent/EP2102488A1/fr not_active Withdrawn
- 2007-12-21 WO PCT/EP2007/064472 patent/WO2008077947A1/fr active Application Filing
- 2007-12-21 US US12/520,637 patent/US7899609B2/en not_active Expired - Fee Related
- 2007-12-21 JP JP2009542100A patent/JP2010531403A/ja not_active Ceased
Non-Patent Citations (1)
Title |
---|
See references of WO2008077947A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2910564B1 (fr) | 2013-05-10 |
US7899609B2 (en) | 2011-03-01 |
JP2010531403A (ja) | 2010-09-24 |
US20100063705A1 (en) | 2010-03-11 |
FR2910564A1 (fr) | 2008-06-27 |
WO2008077947A1 (fr) | 2008-07-03 |
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