EP0782664B1 - Dispositif d'entrainement des accessoires d'un moteur a combustion interne de vehicule automobile - Google Patents
Dispositif d'entrainement des accessoires d'un moteur a combustion interne de vehicule automobile Download PDFInfo
- Publication number
- EP0782664B1 EP0782664B1 EP95931250A EP95931250A EP0782664B1 EP 0782664 B1 EP0782664 B1 EP 0782664B1 EP 95931250 A EP95931250 A EP 95931250A EP 95931250 A EP95931250 A EP 95931250A EP 0782664 B1 EP0782664 B1 EP 0782664B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- drive device
- accessories
- speed
- engine
- 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.)
- Expired - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 title claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000004378 air conditioning Methods 0.000 claims description 11
- 230000007704 transition Effects 0.000 claims description 4
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 230000007257 malfunction Effects 0.000 claims 1
- 230000005284 excitation Effects 0.000 description 9
- 230000009849 deactivation Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000004422 calculation algorithm Methods 0.000 description 3
- 101100328518 Caenorhabditis elegans cnt-1 gene Proteins 0.000 description 2
- 101150044602 Slc28a2 gene Proteins 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 235000005911 diet Nutrition 0.000 description 2
- 230000037213 diet Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 235000001954 papillon Nutrition 0.000 description 1
- 244000229285 papillon Species 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
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
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Definitions
- the present invention relates to drive devices for motors internal combustion of motor vehicles.
- These motors drive accessories, such as the alternator, the hydraulic pump of the power steering, the compressor device air conditioning, etc., via a belt device with a transmission ratio fixed.
- compressor device air conditioning it is desirable to train it only when the air conditioning system is used and this depending on the conditions of use and with a variable transmission ratio so that it works under conditions close to its optimum yield.
- EP-A-0 135 790 and DE-A-4 230 581 show devices driving accessories in which the speed values for operating the gear changes transmission are pre-established.
- the present invention proposes to provide a accessory drive device for a motor internal combustion which allows to train the different accessories at optimum speed and only when used.
- the present invention relates to a drive system for engine accessories internal combustion of a motor vehicle, such as in particular that the alternator, the hydraulic pump of the power steering, the compressor device air conditioning, comprising a member (3,4,5; 11,15,16) variable transmission ratio drive presenting at least two different training reports which is driven by the crankshaft (2), characterized in that it includes a processor (7) which controls said member (3,4,5; 11,15,16) of training so that each gear change is effected according to a speed of adapted threshold ( ⁇ s) of the crankshaft (2), said threshold value being calculated by said processor (7), according to the conditions the engine (1) and depending on the performance of the accessories (6).
- a drive system for engine accessories internal combustion of a motor vehicle such as in particular that the alternator, the hydraulic pump of the power steering, the compressor device air conditioning, comprising a member (3,4,5; 11,15,16) variable transmission ratio drive presenting at least two different training reports which is driven by the crankshaft (2), characterized in that it includes a processor (7) which controls said member
- the organ at least one deactivation device an accessory controlled by the processor.
- the deactivation device may consist of a mechanical or electromagnetic clutch, the declutching is controlled by the processor.
- the alternator In the case of the alternator, it consists of a device to suppress excitation current.
- the organ drive consists of a belt variator trapezoidal.
- the drive member is constituted by a variator hydrostatic including a displacement pump variable supplying at least one hydraulic motor with constant displacement.
- the drive member is a variator toroidal consisting of two concave toroidal surfaces facing each other on which a or more hemispherical elements including the tilt axis defines the transmission ratio.
- the drive member is a variator presenting a finite number of transmission reports.
- the drive member is a variator presenting two transmission ratios and the processor controls the transition from a transmission ratio to the other.
- a threshold value is determined taking into account the operation of the engine at zero charge.
- the current excitation is removed when the throttle control is greater than a threshold value.
- crankshaft 2 drives a relative drive member variable transmission consisting of a variator 3, such than a V-belt drive, at the outlet which is fixed an accessory casing 4 which drives, through n clutches 5, n different accessories 6.
- a variator 3 such than a V-belt drive
- Each accessory is driven at a speed of specific rotation ⁇ 1, ⁇ 2, ... ⁇ n.
- the device according to the invention also comprises a processor, such as a microcomputer 7, which receives operating data from different accessories 6, via an electronic circuit 9 such as a multiplexer, and information concerning the engine speed and coming from the crankshaft 2
- a processor such as a microcomputer 7, which receives operating data from different accessories 6, via an electronic circuit 9 such as a multiplexer, and information concerning the engine speed and coming from the crankshaft 2
- This processor calculates, from the data of operation and speed, set values used to control the values of the transmission ratios for each accessory, on the basis of a program stored in the processor. These setpoints are sent to an electronic circuit 8 which develops the ordering instructions and distributes them to the drive 3 and clutches 5.
- the variator 3 is permanently driven by the motor at a speed ⁇ m proportional to the speed of the motor and it provides output on at least one shaft of output a speed ⁇ va controlled by processor 7.
- the accessories housing 4 has several shafts of output rotating at different speeds ⁇ 1 to ⁇ n. The different accessories 6 are therefore trained to different speeds, each through a clutch 5 which deactivates the accessory matching when not in use.
- each accessory can be driven at a specific speed which is adapted to his technical characteristics and its conditions of operation, each accessory can be uncoupled when not in use.
- the drive speed control strategy of each accessory is as follows. Each accessory is driven at a speed proportional to that of the engine as long as it is not greater at a predetermined threshold.
- each accessory is driven at a speed constant independent of motor speed; this constant speed is optimized by processor 7 in function of a calculation algorithm and data from operation.
- the variator can be a belt variator trapezoidal to obtain a constant speed by acting on a pulley. This can be achieved by acting hydraulically by means of a piston.
- the algorithm for calculating the drive speed allows to obtain the optimal speed taking into account operating conditions so as to reduce strongly the power absorbed by the accessories, especially at high revs, and as a result of increasing the overall engine efficiency.
- FIG. 2 schematically represents a mode of realization of the invention.
- the crankshaft drives a drive unit 11 with two transmission ratios so as to drive an alternator 12 at a speed ⁇ 1 a power steering pump 13 at a speed ⁇ 2, and an air conditioning compressor 14 at a speed ⁇ 3.
- the pump 13 is driven via a deactivation device consisting of a clutch 15.
- the deactivation consists of a suppression device excitation current.
- the deactivation device consists of a clutch 16.
- FIG. 3 schematically represents an engine 1 equipped with an accessory drive in accordance with the present invention, therein is the processor 7, the two-speed converter transmission 11, the alternator 12 which is driven to the speed ⁇ 1, the power steering pump 13 which is driven at speed ⁇ 2, and the air conditioning compressor 14 which is driven at speed ⁇ 3, these two last accessories being dragged together by a same belt.
- the two transmission ratios of the device 11 are used as follows.
- the first report is used for low diets with a ratio global to ensure the benefits of the accessory in slow motion as in the case of training in fixed ratio.
- the second report of the variator 11 reduces the report overall training of each accessory for tops schemes so as to operate the accessory to a regime for which its performance is optimal.
- Figure 4 represents the law of evolution of the mode gear change according to the electrical balance regarding the alternator.
- the evaluation of the electrical balance consists in comparing the average value of the Ubatmoy battery voltage with a nominal battery voltage Ubatnom and in incrementing or decrementing the value Cnt of an up-down counter, this value Cnt constituting an image of this balance electric.
- the Cnt value of the up-down counter is included between 0 and 255; f is a voltage filter and a and b are coefficients that are chosen to get the desired sensitivity.
- the gear change speed ⁇ s varies between two values ⁇ smin and ⁇ saltmax for balance sheet values between two values Cnt1 and Cnt2 according to the law described in figure 4. If Cnt is greater than Cnt2, the speed ⁇ s is equal to ⁇ smin and if Cnt is less than Cnt1, it is equal to nsaltmax.
- the minimum value ⁇ smin is set so that respect the minimum alternator and power steering.
- the maximum value ⁇ saltmax is calculated so to ensure a satisfactory electrical balance for a maximum power consumption, and must be less at the value ⁇ smax corresponding to the maximum speeds of the accessories.
- the speed minimum threshold is fixed at a higher ⁇ sb value or equal to ⁇ smin.
- the threshold speed increases by an amount d ⁇ closed periodically, the period being equal to Tclimax, as can be seen in Figure 5.
- the maximum speed is fixed at a value ⁇ smax which is compatible with the maximum regimes of all accessories, and which is greater than or equal to ⁇ saltmax.
- the gear change regime also takes into account the engine load.
- the angle of the intake throttle being zero, which occurs during braking or when going downhill, the following additional condition is imposed: ⁇ s ⁇ ⁇ sb + d ⁇ sfr where d ⁇ sfr is the variation of the speed of passage for a zero engine load.
- the final gear change speed is determined as follows.
- the transition from the first R1 report to the second R2 ratio is performed for an engine speed, ⁇ mot, greater than or equal to ⁇ s1 and the reverse passage is performed for an engine speed less than or equal to ⁇ s2 as shown in Figure 6.
- the chosen ⁇ s value will be supplied to this calculator for allow it to anticipate the order of the injection.
- the pump release is delayed.
- the excitation current of the alternator can be cut as shown in figure 7 which is a curve of the excitation current as a function of time.
- this cut of excitement is carried out as quickly as possible.
- the excitation current is restored by avoiding abrupt charging of the alternator by limiting the slope of the variation of the excitation current by imposing a ramp Tm of fixed value or dependent on the engine speed.
- the drive ratio chosen is the "economic" report, namely the second R2 report.
- the transmission ratio is blocked on the value R2 so as not to damage the accessories at high diet.
- the invention makes it possible to operate accessories in optimal conditions while avoiding excess consumption of the engine and protecting the accessories, in particular the alternator, for extreme engine speeds.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Transmission Device (AREA)
- Auxiliary Drives, Propulsion Controls, And Safety Devices (AREA)
Description
- La figure 1 illustre schématiquement la mise en oeuvre du principe à la base de l'invention,
- la figure 2 est le schéma de principe d'un mode de réalisation de l'invention,
- la figure 3 représente schématiquement un moteur équipé d'un dispositif selon l'invention, et
- les figures 4 à 7 illustrent la commande de l'entraínement des différents accessoires.
- besoin d'assistance de la direction qui est évalué à partir du couple au volant de direction et de la vitesse du véhicule
- puissance électrique nécessaire qui est évaluée à partir de la tension de la batterie,
- charge du moteur.
si Ubat ≤ Ubatnom
- la durée d'actionnement du compresseur est supérieure
à une durée de référence:
Tcli > Tclimax - la température de l'habitacle est supérieure à la température de confort: hab > habnom
- la variation de température pendant l'unité de temps Δt est inférieure à la variation nominale
- si le couple au volant de direction est supérieur à une valeur de seuil,
- si la vitesse du véhicule est inférieure à une valeur de seuil, l'assistance de la direction étant inutile à grande vitesse.
- soit lors des fortes accélérations du moteur, si cette accélération est supérieure à un seuil déterminé et si le bilan électrique est satisfait
- soit lors de la détection d'une ouverture maximale du papillon d'injection (pédale d'accélérateur "à fond")
- soit lors des phases de démarrage du moteur, le régime moteur étant inférieur à une valeur de seuil
- soit pendant les phases de passage d'un rapport d'entraínement à l'autre afin de diminuer la puissance mécanique à commuter et pour ne pas créer de surtension sur le réseau électrique utilisateur en phase de décélération du moteur.
Claims (14)
- Dispositif d'entraínement des accessoires (6) du moteur à combustion interne (1) d'un véhicule automobile, tels que notamment l'alternateur (12), la pompe hydraulique (13) du dispositif de direction assistée, le compresseur (14) du dispositif de climatisation, comportant un organe (3,4,5;11,15,16) d'entraínement à rapport de transmission variable présentant au moins deux rapports d'entraínement différents qui est entraíné par le vilebrequin (2), caractérisé en ce qu'il comporte un processeur (7) qui commande ledit organe (3,4,5;11,15,16) d'entraínement de telle sorte que chaque changement de rapport est opéré en fonction d'une vitesse de seuil (Ωs) adaptée du vilebrequin (2), ladite valeur de seuil étant calculée par ledit processeur (7), suivant les conditions de fonctionnement du moteur (1) et suivant les prestations des accessoires (6).
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce qu'il comporte au moins un dispositif de désactivation (5;15,16) d'un accessoire (6) commandé par le processeur (7).
- Dispositif d'entraínement selon la revendication 2, caractérisé en ce que le dispositif de désactivation est constitué par un embrayage (5;15,16).
- Dispositif d'entraínement selon la revendication 2, caractérisé en ce que, en ce qui concerne l'alternateur, le dispositif de désactivation est constitué par un dispositif de suppression du courant d'excitation.
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce que l'organe (3,4,5;11,15) d'entraínement est constitué par un variateur à courroie trapézoïdale.
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce que l'organe (3,4,5;11,15) d'entraínement est constitué par un variateur hydrostatique comprenant une pompe à cylindrée variable alimentant au moins un moteur hydraulique à cylindrée constante.
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce que l'organe d'entraínement est un variateur toroïdal.
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce que l'organe d'entraínement est un variateur présentant un nombre fini de rapports de transmission.
- Dispositif d'entraínement selon la revendication 1, caractérisé en ce que l'organe d'entraínement est un variateur (11) présentant deux rapports de transmission (R1,R2) et en ce que le processeur (7) commande le passage d'un rapport de transmission à l'autre.
- Dispositif d'entraínement selon la revendication 9, caractérisé en ce que l'on détermine, pour chaque accessoire, le seuil optimal de changement de rapport et en ce que le seuil de passage est la plus grande des valeurs de seuil de l'ensemble des accessoires.
- Dispositif d'entraínement selon la revendication 10, caractérisé en ce que l'on détermine une valeur de seuil optimal prenant en compte le fonctionnement du moteur à charge nulle.
- Dispositif d'entraínement selon la revendication 9, caractérisé en ce que, en cas de fonctionnement à charge faible ou nulle de l'ensemble des accessoires, on sélectionne le deuxième rapport de transmission (R2).
- Dispositif d'entraínement selon la revendication 9, caractérisé en ce que, en cas de défaillance, on impose le deuxième rapport de transmission(R2).
- Dispositif d'entraínement selon la revendication 4, caractérisé en ce que, en ce qui concerne l'alternateur (12), le courant d'excitation est supprimé lorsque la commande de l'accélérateur est supérieure à une valeur de seuil.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9411360A FR2724881B1 (fr) | 1994-09-23 | 1994-09-23 | Dispositif d'entrainement des accessoires d'un moteur a combustion de vehicule automobile |
FR9411360 | 1994-09-23 | ||
PCT/FR1995/001186 WO1996009464A1 (fr) | 1994-09-23 | 1995-09-15 | Dispositif d'entrainement des accessoires d'un moteur a combustion interne de vehicule automobile |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0782664A1 EP0782664A1 (fr) | 1997-07-09 |
EP0782664B1 true EP0782664B1 (fr) | 1998-05-20 |
Family
ID=9467206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95931250A Expired - Lifetime EP0782664B1 (fr) | 1994-09-23 | 1995-09-15 | Dispositif d'entrainement des accessoires d'un moteur a combustion interne de vehicule automobile |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0782664B1 (fr) |
JP (1) | JPH10505890A (fr) |
DE (1) | DE69502623T2 (fr) |
FR (1) | FR2724881B1 (fr) |
WO (1) | WO1996009464A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE505200C2 (sv) * | 1996-08-30 | 1997-07-14 | Scania Cv Ab | Buss med luftkonditionering |
FR2763901B1 (fr) * | 1997-06-02 | 1999-07-23 | Renault | Dispositif d'entrainement des accessoires d'un moteur a combustion interne d'un vehicule automobile |
DE19728723A1 (de) * | 1997-07-04 | 1999-01-07 | Bayerische Motoren Werke Ag | Antriebsaggregat für Kraftfahrzeuge |
JP2005323425A (ja) | 2004-05-07 | 2005-11-17 | Denso Corp | 車両用発電システム |
DE102005013027A1 (de) * | 2005-03-22 | 2006-10-26 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Antriebsstrang für einen Kompressor und eine Hydraulikpumpe |
DE102006033428A1 (de) | 2006-07-19 | 2008-01-31 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | System mit einem Verdichter und einem Verbraucher in einem Kraftfahrzeug |
BRPI0912304B1 (pt) | 2008-06-04 | 2019-11-19 | Knorr Bremse Systeme Fuer Nutzfahrzeuge Gmbh | sistema do compressor para a alimentação de ar comprimido de um veículo utilitário e processo para o acionamento de um sistema do compressor |
US20230392543A1 (en) * | 2016-12-14 | 2023-12-07 | Bendix Commercial Vehicle Systems Llc | Front End Motor-Generator System and Hybrid Electric Vehicle Operating Method |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2703094A1 (de) * | 1977-01-26 | 1978-07-27 | Bosch Gmbh Robert | Antrieb fuer die nebenaggregate einer brennkraftmaschine, insbesondere in kraftfahrzeugen |
EP0135790A3 (fr) * | 1983-09-29 | 1986-12-03 | Canadian Fram Limited | Mécanisme de contrôle de l'entraínement d'accessoires |
EP0136384A1 (fr) * | 1983-10-03 | 1985-04-10 | Canadian Fram Limited | Accouplement pour poulie de vilebrequin de moteur |
US4938732A (en) * | 1989-06-13 | 1990-07-03 | Gkn Automotive, Inc. | Continuously variable transmission system having variable diameter pulley assemblies responsive to axially directed forces |
DE4230581A1 (de) * | 1992-09-12 | 1994-03-17 | Schlattl Werner Bavaria Tech | Variator für Drehantriebe |
-
1994
- 1994-09-23 FR FR9411360A patent/FR2724881B1/fr not_active Expired - Fee Related
-
1995
- 1995-09-15 JP JP8510640A patent/JPH10505890A/ja not_active Ceased
- 1995-09-15 DE DE69502623T patent/DE69502623T2/de not_active Expired - Fee Related
- 1995-09-15 EP EP95931250A patent/EP0782664B1/fr not_active Expired - Lifetime
- 1995-09-15 WO PCT/FR1995/001186 patent/WO1996009464A1/fr active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
EP0782664A1 (fr) | 1997-07-09 |
JPH10505890A (ja) | 1998-06-09 |
DE69502623D1 (de) | 1998-06-25 |
WO1996009464A1 (fr) | 1996-03-28 |
FR2724881B1 (fr) | 1997-01-03 |
FR2724881A1 (fr) | 1996-03-29 |
DE69502623T2 (de) | 1999-01-28 |
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