EP3445968A1 - Systeme de commande pour demarrage cooperatif entre un alterno-demarreur et un demarreur de vehicule automobile - Google Patents
Systeme de commande pour demarrage cooperatif entre un alterno-demarreur et un demarreur de vehicule automobileInfo
- Publication number
- EP3445968A1 EP3445968A1 EP17722102.5A EP17722102A EP3445968A1 EP 3445968 A1 EP3445968 A1 EP 3445968A1 EP 17722102 A EP17722102 A EP 17722102A EP 3445968 A1 EP3445968 A1 EP 3445968A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- starter
- alternator
- control system
- engine
- phase
- 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- Withdrawn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
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/006—Starting of engines by means of electric motors using a plurality of electric motors
-
- 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
- F02D2200/1006—Engine torque losses, e.g. friction or pumping losses or losses caused by external loads of accessories
-
- 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
- F02D2200/1012—Engine speed gradient
-
- 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
- F02D41/009—Electrical control of supply of combustible mixture or its constituents using means for generating position or synchronisation signals
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/022—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch
- F02N15/023—Gearing between starting-engines and started engines; Engagement or disengagement thereof the starter comprising an intermediate clutch of the overrunning type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
- F02N15/043—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer
- F02N15/046—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the gearing including a speed reducer of the planetary type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
- F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
- F02N15/08—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing being of friction type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2200/00—Parameters used for control of starting apparatus
- F02N2200/02—Parameters used for control of starting apparatus said parameters being related to the engine
- F02N2200/022—Engine speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N2300/00—Control related aspects of engine starting
- F02N2300/10—Control related aspects of engine starting characterised by the control output, i.e. means or parameters used as a control output or target
- F02N2300/104—Control of the starter motor torque
Definitions
- the present invention relates to a control system for cooperative start-up between an alternator-starter and a starter motor vehicle.
- the invention finds a particularly advantageous, but not exclusive, application with diesel-type thermal engines, but could also be used with gasoline engines.
- an alternator / starter comprises a rotating electrical machine able to work reversibly, firstly, as an electric generator alternator function, and secondly as an electric motor, in particular to start the engine of the engine.
- the alternator-starter is configured to start the engine warm.
- the vehicle also carries a starter.
- This starter is provided with a launcher capable of transmitting rotational energy to the crankshaft of the heat engine by means of a pinion meshing with a starting ring of the engine.
- Figure 1 shows, during a start, the evolution as a function of time of the engine speed, the speed of the starter, as well as the current in the starter respectively for a starter sized optimally for a cold start (see curves C1 of the engine speed, C2 of the speed of the armature of the starter and C3 of current in the starter) and for a starter sized optimally for a warm start (see corresponding curves C4 of the engine speed, C5 starter motor speed, and C6 current in the starter).
- the regimes have been reported at the scale of the crankshaft speed so that the actual regime of the armature is offset from that shown in the graph.
- this compression ratio is about T / 4 for the starter adapted to cold starts and about T / 2 for the starter adapted to hot starts of the engine, where T is the period of the speed signal as a function of time.
- the maximum power of the starter is reserved for a cold starter and it is therefore not possible to exploit it to minimize the response time during a warm restart.
- the present invention aims to improve the starting performance of the engine while allowing a reduction in the size of the starter and the alerno-starter associated.
- the invention proposes a control system for a motor vehicle adapted to control a starter equipped with a pinion adapted to mesh with a ring of a heat engine to provide a drive of said heat engine, and a coupled starter-starter with said heat engine, characterized in that said control system is configured for, during a starting phase of said heat engine, driving said starter and said alternator-starter so that said starter and said alternator-starter simultaneously transmit a torque to said heat engine and in that the alternator-starter is controlled according to a driving gear control law engaged during a change of state of the pinion which passes from a state of driven pinion to driving gear and in this that the alternator / starter is controlled according to a driven gear control law engaged during a change of state of the pinion which passes from a pinion state leading to p ignon led and in that the Driving law driving gear is different from the control law conducted.
- the invention thus makes it possible, by virtue of the contribution of the alternator-starter, to reduce the size and the power of the starter but also of the alternator-starter whose required level of performance is lower than that of an alternator. starter starting the engine alone. Despite these possible dimensioning reductions, the invention makes it possible to reach more quickly the autonomy regime of the heat engine.
- the drive gear control law is called in the following third control law and the drive gear driven law is called in the following control law.
- the driving gear control law is configured to decrease the deceleration of the crankshaft of the engine while providing at least half the torque of the starter and in that the drive gear control law is configured to increase the speed when the gas expansion phase to shorten its period.
- said control system is configured to drive said starter and said alternator-starter during a cold start of said engine. According to one embodiment, said control system is configured to drive said starter and said alternator-starter during a warm start of said engine.
- said starter is configured to be driven in an open loop and in that said alternator-starter is configured to be controlled in a closed loop.
- the alternator-starter is controlled according to a control law in the form of slots and each slot has an amplitude that is between 3 and 5 times less than a starter torque.
- the law is triggered during a change of state of the starter pinion which changes from a state of driven pinion to driving gear.
- the torque generated by said alternator-starter during said startup phase depends on an inertial torque of said engine.
- said control system is configured to drive said alternator-starter according to a first control law also called initial control law.
- the first phase corresponds to a rotational range of 90 degrees crankshaft for a four-cylinder engine or a 120-degree crankshaft rotation range for a three-cylinder engine.
- said control system is configured to drive said alternator-starter according to a second control law.
- a command of said alternator-starter is cut in a deceleration phase of said engine and during a stall phase of a freewheel of said starter.
- said control system is configured to drive said alternator-starter according to a third control law.
- said torque generated by said alternator-starter is equal to kJ mt hd 2 and mt h / dt 2 , with J mt h representing an inertia of said engine, e m th corresponding to a crank angle, t corresponding to time, and a value of k varying according to an operating phase of said engine.
- k is 1 according to the first and the second control law. This virtually cancels the moment of inertia of the engine seen from the starter. It thus facilitates the energy costs of the work to be provided by the starter. In addition, this reduces the duration of the expansion phase of the engine by increasing the growth of the crankshaft speed.
- k is -2 following the third control law. This makes it possible to reduce the speed decrease of the crankshaft during the attachment phase of the freewheel, so that the duration of the attachment phase is reduced.
- the invention also relates to an assembly for starting a heat engine comprising a starter, an alternator-starter, and a control system as defined above.
- said assembly comprises a starter having a power of between 1 .4kW and 1 .8kW and an alternator-starter having a power of between 2 and 2.5kW.
- the starter ensuring the start of such an engine requires a higher power of between 1.8 and 2 kW.
- FIG. 1 already described shows, during a start of the heat engine, the curves of time evolution of the current of the starter as well as the speeds of the engine and the starter respectively for a starter sized optimally for a cold start. and for a starter optimally sized for hot start of the engine;
- Figure 2 is a schematic representation of the control system according to the present invention for controlling a cooperative start between an alternator-starter and a starter of a motor vehicle;
- FIG. 3 shows, during a start of the heat engine, the time evolution curves of the engine and starter engine speeds, the crankshaft angle, as well as the inertial torque curve of the heat engine from which is developed the torque control of the alternator-starter;
- FIG. 4 shows time evolution curves of the speed of the engine and starter showing the gain in efficiency at startup during the implementation of the invention.
- FIG. 2 schematically illustrates the control system 10 intended to control a starter 1 1 with a pinion capable of meshing with a ring gear of the heat engine 12 to drive it, as well as an alternator-starter 13 coupled to it. with the heat engine.
- the starter-alternator 13 is provided with a pulley belonging to a belt-driven transmission device between the alternator-starter 13 and the heat engine 12.
- the alternator-starter 13 comprises a rotating electric machine able to work in a reversible manner, firstly, as an electric generator, and secondly as an electric motor, in particular for driving the heat engine 12 during its starting.
- control system 10 in connection with a battery 14 is configured to control the current alternator-starter 13 according to the detected operating phases of hooking and unhooking of the freewheel in particular.
- the starter 1 1 and the alternator starter 13 can simultaneously transmit at least temporarily a torque C to the engine 12 during a startup phase.
- the starter 1 1 is controlled in open loop while the alternator-starter 13 is controlled in a closed loop.
- the alternator-starter 13 is controlled from to generate, during the starting phase, a torque depending on the inertial torque of the heat engine 12, itself composed of the product
- control system 10 drives the alternator-starter 13 so as to produce a virtual modulation effect of the moment of inertia of the engine 12 perceived by the starter 1 January.
- the modulation of the moment of inertia is called “virtual” because it is not physically performed by distance or approximation of mass with respect to an axis of rotation, but by the specific command involving a term proportional to d 2 9 mth / dt 2
- the torque generated by the alternator-starter 13 is equal to kJ mt hd 2 and mt h / dt 2 , with J mt h representing the inertia of the heat engine, e mt h corresponding to the angle of the crankshaft, t corresponding to time, and the value of k varying according to the operating phase of the engine 12.
- FIG. 3 shows the evolution, during a start of the heat engine 12, of the speed of the heat engine 12 (curve Qmth), of the crankshaft angle (curve Bmth), and of the speed of the starter armature 1 1 (Qdem curve).
- the curve Qdem reported to the crankshaft merges with the Qmth curve during a hooking phase Pacc freewheel, that is to say when the starter gear 1 1 rotates the motor drive ring 12 and differs from the Qmth curve during a stall phase Pdec of the freewheel, that is to say when the ring of the heat engine 12 rotates faster than the armature of the starter 1 1 to gear ratio .
- the phases Comp and Exp respectively correspond to compression and expansion (or expansion) phases of the heat engine 12.
- the moment of inertia Mmth of the heat engine 12 is shown in solid line during a hooking phase Pacc and dashed line during a stall phase Pdec.
- the torque of the starter Cdem is the result of the load torque of the heat engine 12, the inertia torque of the electric machine of the starter 1 1, and the inertia torque of the heat engine 12.
- the control system 10 controls the engine. alternator-starter 13 according to a first control law.
- k is 1, that is to say that the torque provided by the alternator-starter 13 is J mt hd 2 0 m th / dt 2 . This virtually reduces the inertia of the heat engine J m th to minimize the torque requirements of the starter 1 1.
- the control system 10 drives the alternator-starter 13 according to a second control law.
- the second control law is the same as the first control law to virtually reduce the inertia of the heat engine Jmth, that is to say that k is also 1.
- the second control law may be different from the first control law. In all cases, the second control law must reduce the inertia of the heat engine Jmth.
- the control of the alternator-starter 13 according to the second control law is carried out over the period P 'from the end of the initial period Pinit to the first peak of the engine 12.
- phase P "corresponding to a deceleration phase of the heat engine 12 the system 10 temporarily cuts the control of the alternator-starter 13.
- the phase P" of switching off the control of the alternator-starter 13 starts at the instant of the first peak of the engine speed and ends at the beginning of the Pacc hooking phase.
- the control system 10 is configured to control the alternator-starter 13 according to a third control law.
- k is -2, that is to say that the torque provided by the alternator-starter is then -2.J mt hd 2 0 m th / dt 2 .
- the starter 1 1 and the alternator-starter 13 can thus be controlled during a cold start or hot engine 12.
- the system may include other control laws according to which k may be greater than 1 or less than -2. This makes it possible to shorten the starting time of the engine but has the disadvantage of increasing the energy consumption and of using the starter mechanism.
- the alternator-starter 13 is controlled according to a control law in the form of slots. Each slot has an amplitude that is between 3 and 5 times less than a starter torque 1 1. Said law is engaged during a change of state of the pinion which passes from a state of driven pinion to driving gear. This change of state is reflected theoretically on the curve by a discontinuity of the angular acceleration of the crankshaft. Due to the torque contribution of the alternator-starter 13, it is possible to reduce the size of the starter 1 1 but also that of the alternator-starter 13 whose required performance level is lower than that of an alternator starter 13 starting only the engine 12.
- a starter 1 1 having a power between 1 .4kW and 1 .8kW and an alternator-starter 13 having a power of between 2 and 2.5kW.
- the starter ensuring the start of such an engine requires a higher power of between 1.8 and 2 kW.
- the invention makes it possible to reach more quickly the range of autonomy of the engine 12 characterized by reaching the third top dead center (TDC # 3) with a sufficient engine speed (greater than 200 rpm).
- TDC # 3 third top dead center
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1653546A FR3050487B1 (fr) | 2016-04-21 | 2016-04-21 | Systeme de commande pour demarrage cooperatif entre un alterno-demarreur et un demarreur de vehicule automobile |
| PCT/FR2017/050896 WO2017182741A1 (fr) | 2016-04-21 | 2017-04-13 | Systeme de commande pour demarrage cooperatif entre un alterno-demarreur et un demarreur de vehicule automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3445968A1 true EP3445968A1 (fr) | 2019-02-27 |
Family
ID=56101724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17722102.5A Withdrawn EP3445968A1 (fr) | 2016-04-21 | 2017-04-13 | Systeme de commande pour demarrage cooperatif entre un alterno-demarreur et un demarreur de vehicule automobile |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3445968A1 (fr) |
| CN (1) | CN109072855B (fr) |
| FR (1) | FR3050487B1 (fr) |
| WO (1) | WO2017182741A1 (fr) |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07119594A (ja) * | 1993-09-02 | 1995-05-09 | Nippondenso Co Ltd | 車両用内燃機関始動装置 |
| JP4144348B2 (ja) * | 2002-04-26 | 2008-09-03 | 株式会社デンソー | エンジン始動システム |
| JP3815441B2 (ja) * | 2003-02-04 | 2006-08-30 | トヨタ自動車株式会社 | 内燃機関の停止始動制御装置 |
| JP4075699B2 (ja) * | 2003-06-20 | 2008-04-16 | トヨタ自動車株式会社 | 車両の制御装置 |
| DE102004032173B4 (de) * | 2004-07-02 | 2015-07-30 | Volkswagen Ag | Verfahren zum Betreiben eines Hybrid-Kraftfahrzeuges |
| DE102008011479A1 (de) * | 2008-02-27 | 2009-09-03 | Schaeffler Kg | Starteinrichtung einer Brennkraftmaschine |
| JP4631962B2 (ja) * | 2008-11-11 | 2011-02-16 | トヨタ自動車株式会社 | エンジン始動制御装置 |
| JP5817136B2 (ja) * | 2011-02-16 | 2015-11-18 | 日産自動車株式会社 | エンジンの始動装置の保護装置 |
| JP5728996B2 (ja) * | 2011-02-16 | 2015-06-03 | 日産自動車株式会社 | エンジンの始動装置 |
| US9108633B1 (en) * | 2014-03-13 | 2015-08-18 | GM Global Technology Operations LLC | Hybrid powertrain and method of controlling same |
-
2016
- 2016-04-21 FR FR1653546A patent/FR3050487B1/fr active Active
-
2017
- 2017-04-13 WO PCT/FR2017/050896 patent/WO2017182741A1/fr not_active Ceased
- 2017-04-13 EP EP17722102.5A patent/EP3445968A1/fr not_active Withdrawn
- 2017-04-13 CN CN201780024610.7A patent/CN109072855B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN109072855A (zh) | 2018-12-21 |
| FR3050487A1 (fr) | 2017-10-27 |
| CN109072855B (zh) | 2021-03-09 |
| WO2017182741A1 (fr) | 2017-10-26 |
| FR3050487B1 (fr) | 2019-08-30 |
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