FR2898081A1 - Internal combustion engine i.e. heat engine, for use in e.g. motor vehicle, has discoid type electric machine disposed between flywheel and engine block, and implanted around nose of crankshaft and bearing of crankshaft - Google Patents

Internal combustion engine i.e. heat engine, for use in e.g. motor vehicle, has discoid type electric machine disposed between flywheel and engine block, and implanted around nose of crankshaft and bearing of crankshaft Download PDF

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Publication number
FR2898081A1
FR2898081A1 FR0650726A FR0650726A FR2898081A1 FR 2898081 A1 FR2898081 A1 FR 2898081A1 FR 0650726 A FR0650726 A FR 0650726A FR 0650726 A FR0650726 A FR 0650726A FR 2898081 A1 FR2898081 A1 FR 2898081A1
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France
Prior art keywords
engine
flywheel
crankshaft
electric machine
engine block
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FR0650726A
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French (fr)
Inventor
Christian Noiret
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PSA Automobiles SA
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Peugeot Citroen Automobiles SA
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Priority to FR0650726A priority Critical patent/FR2898081A1/en
Publication of FR2898081A1 publication Critical patent/FR2898081A1/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B60K6/485—Motor-assist type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/24—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the combustion engines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/006—Structural association of a motor or generator with the drive train of a motor vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B60K2006/268—Electric drive motor starts the engine, i.e. used as starter motor
    • 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
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/62—Hybrid vehicles

Abstract

The engine has a crankshaft on which a connection rod of a piston, a side of an engine block and a flywheel are mounted. A discoid type electric machine is disposed between the flywheel and the engine block. The electric machine is implanted around the nose of the crankshaft and a bearing of the crankshaft. A rotor (14) of the machine is disposed on a side of the flywheel located opposite to the engine block. A stator (13) of the machine is disposed on the side of the engine block turned towards the flywheel.

Description

Agencement d'une machine électrique tournante dans un moteur à combustionArrangement of a rotary electric machine in a combustion engine

interne [0001] La présente invention concerne un agencement d'un stator et d'un rotor, destinés à former ensemble, avec un arbre tournant, une machine électrique tournante, dans un moteur à combustion interne, également appelé moteur thermique. L'invention concerne également un moteur à combustion interne comportant un tel agencement. [0002] Les moteurs récents, en particulier les moteurs à injection directe, génèrent des couples très importants, ce qui est recherché pour améliorer les performances du véhicule, notamment au niveau des accélérations par exemple pour permettre un dépassement rapide.  The present invention relates to an arrangement of a stator and a rotor for forming, together with a rotating shaft, a rotating electrical machine in an internal combustion engine, also called a heat engine. The invention also relates to an internal combustion engine comprising such an arrangement. Recent engines, especially direct injection engines, generate very large torques, which is sought to improve the performance of the vehicle, particularly in terms of accelerations for example to allow a fast overtaking.

Toutefois, cette augmentation du couple tend à augmenter les acyclismes moteurs qu'il devient de plus en plus difficile de compenser simplement au niveau du volant moteur. [0003] L'invention a par conséquence pour but de procurer un moyen permettant d'améliorer cette compensation. [0004] Selon l'invention, ce but est atteint en disposant une machine électrique dont une partie est solidaire du volant moteur. Plus précisément, l'invention a ainsi pour objet à un moteur à combustion interne comportant un bloc moteur avec une pluralité de cylindres dont les pistons sont associés à un vilebrequin et un volant moteur et comportant une machine électrique dont le stator et le rotor sont des éléments discoïdes, le rotor étant disposé solidaire d'une face du volant moteur. 2 0 [0005] Des machines dites discoïdes ne sont certes pas la technologie la plus répandue dans le domaine des machines électriques où la technologie de loin la plus courante consiste à disposer le rotor et le stator de manière concentrique mais cette technologie selon laquelle le rotor et le stator sont en fait deux disques disposés côte à côte en alignement axial se rencontre dans quelques applications spécifiques en particulier dans des moteurs de 25 bateaux, de sous-marins et pour des éoliennes. dites discoïdes . [0006] L'utilisation d'une machine électrique discoïde permet d'obtenir un démarrage rapide du moteur thermique, et cela grâce à un régime élevé qu'il peut atteindre dans un temps très court, on peut récupérer de l'énergie au freinage et, accessoirement, on met à disposition une puissance additionnelle développée par la machine électrique tournante, 3 0 utilisable, par exemple, pendant les phases d'accélération renforcée. [0007] De plus, avec une machine électrique ainsi couplée sur le volant moteur, et donc indirectement au vilebrequin, il devient possible d'ajouter un couple positif ou négatif au volant moteur et donc de minimiser les acyclismes du moteur. Rappelons que les acyclismes du moteur sont essentiellement dus au fait que les mouvements ascendants et descendant des pistons ne sont pas totalement équivalents et créent alternativement un effet d'accélération et de freinage au niveau du vilebrequin, acyclisme essentiellement compensé par le couple du volant moteur). [0008] De préférence, rotor et stator sont disposés coaxialement. [0009] De préférence encore, le rotor est disposé sur la face du volant moteur située en regard du bloc moteur. Cette variante de l'invention plus particulièrement préférée permet de plus de résoudre un problème d'implantation du groupe motopropulseur dans le véhicule. En effet, les contraintes d'implantation sont de plus en plus sévères et cela notamment du fait du nombre d'accessoires à implanter en plus du moteur proprement dit, et aussi en raison des normes de protection, y compris de protection de piétons, et de dépollution. Par ailleurs, de nouvelles fonctions telles que l'utilisation d'une machine électrique tournante unique réunissant en elle les fonctions de démarreur et de générateur, imposent des contraintes supplémentaires telles que le dimensionnement de la transmission de mouvement entre la machine électrique et le moteur thermique et la taille de la machine électrique tournante elle-même 2 0 [0010] En outre, les compartiments moteur des véhicules actuels sont calculés au plus juste, ce qui a pour conséquence que la place disponible pour une chaîne de traction hybride (thermique + électrique) est souvent très limitée. [0011] Pour résoudre le problème du manque de place dans le compartiment moteur d'un véhicule automobile, certains éléments sont rendus indépendants de l'entraînement 25 mécanique venant du moteur thermique grâce à l'entraînement par un ou des moteurs électriques. D'autres solutions sont trouvées en repensant complètement l'architecture du moteur thermique et notamment en repositionnant les sorties d'entraînement, la disposition de pignons, des accouplements axiaux etc. [0012] Toutefois, les diverses réponses aux contraintes anciennes et nouvelles ne peuvent 3 0 pas être adaptées à tous les problèmes à résoudre. Ainsi, par exemple, la fonction nouvelle dite stop and start selon laquelle le moteur thermique ne tourne pas continuellement, mais est arrêté momentanément au cours de l'utilisation d'un véhicule automobile selon des critères prédéterminés, demande la mise en place d'une machine électrique tournante capable de prendre le relais en entraînement lorsque le moteur thermique est arrêté. [0013] En implantant la machine électrique entre le bloc moteur et le volant moteur, on exploite une place disponible inoccupée dans le compartiment moteur d'un véhicule automobile. Outre qu'elle permet l'utilisation d'un volume gratuit , la présente invention apporte par ailleurs encore un autre avantage, à savoir que le stator, implanté sur le bloc moteur, et ses points de fixation, rigidifient la structure du moteur thermique et en particulier la liaison moteur/boite de vitesses. [0014] Selon les règles de la conception d'un moteur à combustion interne, ou moteur thermique, celui-ci dispose d'une sortie de puissance sur laquelle on vient fixer un volant à moteur. Ainsi, on retrouve à une extrémité du moteur un dernier palier de vilebrequin puis, ménagée sur le vilebrequin, une portée cylindrique permettant d'assurer l'étanchéité de l'huile. Il s'ensuit qu'il existe un espace non négligeable entre la face d'appui du volant moteur et la tangente du premier cylindre du moteur thermique. C'est cet espace que la présente invention se propose d'utiliser pour y loger une machine électrique tournante. [0015] Selon un mode de réalisation avantageux, cette machine électrique tournante est conformée pour remplir la fonction d' alterno-démarreur. [0016] En ce qui concerne la conception du moteur thermique, la solution préférée de l'invention apporte l'avantage que la face embrayage n'est pas modifiée et peut donc 2 0 recevoir l'embrayage d'origine. [0017] Un autre avantage est que la conception du moteur thermique du côté du volant moteur ne nécessite pas beaucoup de modifications pour pouvoir implanter le stator. [0018] Par ailleurs, selon les contraintes d'implantation, le stator peut être de révolution complète ou partielle pour s'affranchir de proximités trop sévères avec le cylindre ou le 25 palier de vilebrequin. [0019] D'autres caractéristiques et avantages de la présente invention ressortiront de la description ci-après d'un mode de réalisation de l'invention. [0020] La description est faite en référence aux dessins dans lesquels : [0021] la figure 1 rappelle, en une vue en coupe, la conception d'un moteur thermique du 3 0 côté du volant moteur avant l'invention ; [0022] la figure 2 représente, également en vue en coupe, un agencement selon un second mode de réalisation préféré de l'invention avec une machine électrique discoïde disposée entre le volant moteur et le bloc moteur ; [0023] La figure 1 rappelle de manière très simplifiée, sur une vue en coupe, la conception d'un moteur thermique du côté du volant moteur. La figure 1 montre plus particulièrement un vilebrequin 1 sur lequel est montée une bielle 2 d'un piston, une paroi 3 du bloc moteur et un volant moteur 4. Le volant 4 est pourvu d'une couronne dentée destinée à engrener avec un démarreur. [0024] On peut donc noter aisément un espace 6 entre le volant moteur 4 et le bloc 10 moteur disponible l'invention. [0025] Selon l'invention, le moteur est associé à une machine électrique du type discoïde. Plus précisément, et comme illustré avec la figure 2, le stator et le rotor sont deux disques dont les axes sont disposés parallèlement à l'axe du vilebrequin avec un rotor monté solidaire du volant moteur. 15 [0026] Le stator peut être disposé sur la face du volant tournée vers l'embrayage ou, dans la variante de réalisation préférée ici représenté, sur une paroi modifiée du bloc moteur. [0027] Sur cette figure 2, il est important de noter que deux plans restent inchangés par rapport au moteur de série illustré figure 1 : la face d'appui vilebrequin/volant et la position de la face de friction de l'embrayage. La machine électrique est implantée 2 0 autour du nez du vilebrequin et du palier, avec une partie implantée sur le volant moteur et une partie implantée sur le bloc moteur. [0028] Pour mieux accueillir la machine électrique, la paroi 3A du bloc moteur, tournée vers le volant moteur a été légèrement modifiée. [0029] Il en est de même de la paroi périphérique du volant moteur modifiée par rapport 25 à celle du volant moteur 4 de la figure 1 et qui, de plus, ne comprend plus de couronne dentée 5. [0030] Ainsi, l'espace initial 6 entre le volant moteur et la paroi du bloc moteur a été agrandi pour faire la place pour un stator 13 et un rotor 14. La face d'appui vilebrequin/volant, reste exactement à la même distance que dans le cas du moteur série 3 0 connu de l'art illustré figure 1. [0031] Ces modifications peuvent se faire par usinage, notamment si on cherche à modifier un bloc moteur ou un volant moteur conventionnels, ou par modification de ces éléments au stade de la coulée ce qui est bien sûr préférable du point de vue d'une application série. [0032] Quelque soit le mode de réalisation choisi, l'entrefer entre le stator et le rotor doit être petit. [0033] Quel que soit le mode de réalisation retenu, il est clair que la forme du stator est déterminée en fonction de la place disponible. Ainsi, plutôt qu'un disque complet, le stator peut être de révolution partielle et/ou réalisé en plusieurs parties. [0034] De même, les dimensions du rotor sont choisies en tenant compte de l'espace approprié, et notamment pourra être de révolution partielle. Le rotor peut être constitué par des aimants permanents ou des électroaimants ou encore en un acier ferro-magnétique passif. [0035] Stator et rotor sont fixés au bloc moteur ou respectivement au volant moteur par tout moyen approprié, notamment par collage, frettage ou assemblage mécanique. [0036] L'électronique de puissance nécessaire au fonctionnement de la machine électrique, et non représentée sur les figures, pourra être fixée directement sur le carter moteur ou à quelconque autre endroit approprié du compartiment moteur. [0037] La machine électrique peut être utilisée pour assurer différentes fonctions. Parmi celles-ci, citons tout particulièrement le démarrage du moteur (démarreur), la recharge de la 2 0 batterie du véhicule (alternateur) ; ces deux fonctions étant typiquement combinées (alterno-démarreur), l'invention permettant un gain de compacité tout particulièrement intéressant avec les petits véhicules pour lesquels le compartiment moteur est nécessairement petit. [0038] La machine électrique peut également être utilisée comme source d'énergie du 2 5 véhicule. Il peut s'agit par exemple d'un complément d'énergie permettant de booster le véhicule en assurant un surcroît de puissance par exemple dans des phases d'accélération. Cette machine électrique peut également assurer l'énergie nécessaire pour le redémarrage du véhicule, pendant la période nécessaire au redémarrage du moteur lorsque celui-ci a été stoppé suite à l'arrêt temporaire du véhicule (application dite stop-and-start). 3 0 [0039] Enfin, comme la machine est disposée sur le volant moteur, elle peut être utilisée pour récupérer de l'énergie au freinage. [0040] Les caractéristiques de la machine électrique dépendront bien entendu des utilisations envisagées. A titre indicatif, la puissance électrique d'un démarreur ou d'un alternodémarreur est de l'ordre de 1,5KW. Si la machine électrique est utilisée pour la propulsion du véhicule (soit pour de courte période comme pour les applications dites stop and start soit pour des périodes prolongées comme pour les applications véhicule hybride, la puissance requise sera comprise entre 8 et 16 KW. Notons par ailleurs que comme la machine selon l'invention vient se loger dans un espace inoccupé, rien n'interdit d'utiliser en complément une machine électrique logée dans une position conventionnelle et de répartir ensuite l'ensemble de la puissance disponible pour les multiples applications souhaitées.  However, this increase in torque tends to increase motor acyclisms that it becomes increasingly difficult to compensate simply at the flywheel. The invention therefore aims to provide a means to improve this compensation. According to the invention, this object is achieved by arranging an electric machine, a part of which is integral with the flywheel. More specifically, the invention thus relates to an internal combustion engine comprising an engine block with a plurality of cylinders whose pistons are associated with a crankshaft and a flywheel and comprising an electric machine whose stator and rotor are disc elements, the rotor being disposed integral with a face of the flywheel. So-called discoid machines are certainly not the most widespread technology in the field of electrical machines, where by far the most common technology is to arrange the rotor and the stator concentrically but this technology that the rotor and the stator are actually two disks arranged side by side in axial alignment is found in some specific applications especially in boat, submarine and wind turbine engines. say discoid. The use of a discoidal electric machine provides a rapid start of the engine, and this thanks to a high speed that can reach in a very short time, it can recover energy braking and, incidentally, additional power developed by the rotating electrical machine is provided, which can be used, for example, during the enhanced acceleration phases. In addition, with an electric machine and coupled to the flywheel, and thus indirectly to the crankshaft, it becomes possible to add a positive or negative torque to the flywheel and thus minimize motor acyclisms. Recall that the motor acyclisms are mainly due to the fact that the upward and downward movements of the pistons are not completely equivalent and create alternately an acceleration and braking effect at the crankshaft, acyclism substantially offset by the torque of the flywheel) . [0008] Preferably, the rotor and the stator are arranged coaxially. More preferably, the rotor is disposed on the face of the flywheel located opposite the engine block. This variant of the invention, more particularly preferred, also makes it possible to solve a problem of implantation of the powertrain in the vehicle. Indeed, the implementation constraints are becoming more severe and this especially because of the number of accessories to implement in addition to the engine itself, and also because of the standards of protection, including pedestrian protection, and depollution. Moreover, new functions such as the use of a single rotating electrical machine combining the functions of starter and generator, impose additional constraints such as the dimensioning of the motion transmission between the electric machine and the engine. and the size of the rotating electric machine itself. [0010] In addition, the engine compartments of the current vehicles are calculated as accurately as possible, which has the consequence that the space available for a hybrid traction system (thermal + electric) ) is often very limited. In order to solve the problem of the lack of space in the engine compartment of a motor vehicle, certain elements are made independent of the mechanical drive coming from the heat engine thanks to the drive by one or more electric motors. Other solutions are found by completely rethinking the architecture of the engine and in particular by repositioning the drive outputs, the arrangement of pinions, axial couplings, etc. [0012] However, the various responses to old and new constraints can not be adapted to all the problems to be solved. Thus, for example, the new so-called stop and start function according to which the heat engine does not rotate continuously, but is stopped momentarily during the use of a motor vehicle according to predetermined criteria, requires the establishment of a rotating electrical machine capable of taking over the drive when the engine is stopped. By implanting the electric machine between the engine block and the flywheel, it exploits an unoccupied available space in the engine compartment of a motor vehicle. In addition to allowing the use of a free volume, the present invention also brings another advantage, namely that the stator, implanted on the engine block, and its attachment points, stiffen the structure of the engine and in particular the motor / gearbox connection. According to the rules of the design of an internal combustion engine, or engine, it has a power output on which it comes to fix a motor wheel. Thus, there is at one end of the engine a last bearing crankshaft and then, formed on the crankshaft, a cylindrical bearing for sealing the oil. It follows that there is a significant space between the bearing surface of the flywheel and the tangent of the first cylinder of the engine. It is this space that the present invention proposes to use to house a rotating electrical machine. According to an advantageous embodiment, this rotating electrical machine is shaped to perform the function of alternator-starter. With regard to the design of the heat engine, the preferred solution of the invention provides the advantage that the clutch face is not modified and can therefore receive the original clutch. Another advantage is that the design of the engine on the flywheel side does not require many changes to implement the stator. Furthermore, according to the implantation constraints, the stator may be of complete or partial revolution to overcome too severe proximities with the cylinder or the crankshaft bearing. Other features and advantages of the present invention will become apparent from the following description of an embodiment of the invention. The description is made with reference to the drawings in which: [0021] FIG. 1 recalls, in a sectional view, the design of a heat engine on the side of the flywheel before the invention; [0022] Figure 2 shows, also in sectional view, an arrangement according to a second preferred embodiment of the invention with a discoidal electric machine disposed between the flywheel and the engine block; Figure 1 remembers very simply, in a sectional view, the design of a heat engine on the flywheel side. Figure 1 shows more particularly a crankshaft 1 on which is mounted a connecting rod 2 of a piston, a wall 3 of the engine block and a flywheel 4. The steering wheel 4 is provided with a ring gear for meshing with a starter. It is therefore easy to note a space 6 between the flywheel 4 and the engine block 10 available the invention. According to the invention, the motor is associated with a discoid type electric machine. More precisely, and as illustrated in FIG. 2, the stator and the rotor are two disks whose axes are arranged parallel to the axis of the crankshaft with a rotor mounted integral with the flywheel. The stator may be disposed on the face of the steering wheel facing the clutch or, in the preferred embodiment shown here, on a modified wall of the engine block. In this Figure 2, it is important to note that two plans remain unchanged from the series engine illustrated in Figure 1: the crankshaft / flywheel bearing face and the position of the friction face of the clutch. The electric machine is located around the nose of the crankshaft and the bearing, with a portion implanted on the flywheel and a portion implanted on the engine block. To better accommodate the electric machine, the wall 3A of the engine block, facing the flywheel has been slightly modified. It is the same for the peripheral wall of the engine flywheel modified with respect to that of the flywheel 4 of FIG. 1 and which, moreover, no longer comprises a ring gear 5. [0030] Thus, the initial space 6 between the flywheel and the wall of the engine block has been enlarged to make room for a stator 13 and a rotor 14. The crankshaft / flywheel support face, remains exactly at the same distance as in the case of the engine series 3 known from the art illustrated in Figure 1. [0031] These modifications can be done by machining, especially if one seeks to modify a conventional engine block or flywheel, or by modifying these elements at the casting stage. which of course is preferable from the point of view of a serial application. Whatever the embodiment chosen, the air gap between the stator and the rotor must be small. Whatever the embodiment chosen, it is clear that the shape of the stator is determined according to the available space. Thus, rather than a complete disk, the stator may be of partial revolution and / or made in several parts. Similarly, the rotor dimensions are chosen taking into account the appropriate space, and in particular may be partial revolution. The rotor may consist of permanent magnets or electromagnets or a passive ferro-magnetic steel. Stator and rotor are fixed to the engine block or the flywheel by any appropriate means, including bonding, hooping or mechanical assembly. The power electronics necessary for the operation of the electric machine, and not shown in the figures, may be fixed directly to the crankcase or to any other appropriate location of the engine compartment. The electric machine can be used to provide different functions. These include, in particular, starting the engine (starter), recharging the vehicle battery (alternator); these two functions being typically combined (alternator-starter), the invention allows a gain of compactness particularly interesting with small vehicles for which the engine compartment is necessarily small. The electric machine can also be used as a power source for the vehicle. It may for example be a supplement of energy to boost the vehicle by providing additional power for example in acceleration phases. This electric machine can also provide the energy required for the restart of the vehicle, during the period necessary to restart the engine when it was stopped following the temporary stop of the vehicle (so-called stop-and-start application). Finally, since the machine is disposed on the flywheel, it can be used to recover energy during braking. The characteristics of the electric machine will of course depend on the intended uses. As an indication, the electrical power of a starter or an alternator starter is of the order of 1.5KW. If the electric machine is used for the propulsion of the vehicle (either for short period as for the so-called stop and start applications or for extended periods as for the hybrid vehicle applications, the power required will be between 8 and 16 KW. other than as the machine according to the invention is housed in an unoccupied space, nothing forbids to use in addition an electric machine housed in a conventional position and then distribute all the power available for the multiple desired applications .

Claims (8)

REVENDICATIONS 1. Moteur à combustion interne comportant un bloc moteur avec une pluralité de cylindres dont les pistons sont associés à un vilebrequin et un volant moteur, caractérisé en ce qu'il comprend une machine électrique dont le stator et le rotor sont des éléments discoïdes, le rotor étant disposé solidaire d'une face du volant moteur.  An internal combustion engine comprising an engine block with a plurality of cylinders whose pistons are associated with a crankshaft and a flywheel, characterized in that it comprises an electric machine whose stator and rotor are discoid elements, the rotor being disposed integral with a face of the flywheel. 2. Moteur selon la revendication 1, caractérisé en ce que le rotor et le stator sont disposés co-axialement.  2. Motor according to claim 1, characterized in that the rotor and the stator are arranged co-axially. 3. Moteur selon la revendication 1 ou 2, caractérisé en ce que le rotor est disposé sur la 10 face du volant moteur située en regard du bloc moteur.  3. Motor according to claim 1 or 2, characterized in that the rotor is disposed on the face of the flywheel situated opposite the engine block. 4. Moteur selon la revendication 3, caractérisé en ce que le stator est disposé solidaire de la face du bloc moteur tournée vers le volant moteur.  4. Motor according to claim 3, characterized in that the stator is disposed integral with the face of the engine block facing the flywheel. 5. Moteur selon la revendication 4, caractérisé en ce que la machine électrique est disposée dans l'espace entre la face d'appui du volant moteur et le premier cylindre du 15 moteur thermique.  5. Motor according to claim 4, characterized in that the electric machine is disposed in the space between the bearing surface of the flywheel and the first cylinder of the heat engine. 6. Véhicule automobile comportant un moteur selon l'une quelconque des revendications 1 à 5.  6. Motor vehicle comprising an engine according to any one of claims 1 to 5. 7. Véhicule selon la revendication 6, selon lequel la machine électrique assure l'énergie nécessaire au redémarrage du véhicule pendant le redémarrage du moteur lorsque 2 0 celui-ci a été stoppé suite à l'arrêt temporaire du véhicule.  7. Vehicle according to claim 6, wherein the electric machine provides the energy required to restart the vehicle during the restart of the engine when it has been stopped following the temporary stopping of the vehicle. 8. Véhicule selon la revendication 6 caractérisé en ce que la machine électrique produit un couple négatif ou positif, utilisé pour réduire les acyclismes du moteur.  8. Vehicle according to claim 6 characterized in that the electric machine produces a negative or positive torque, used to reduce motor acyclisms.
FR0650726A 2006-03-02 2006-03-02 Internal combustion engine i.e. heat engine, for use in e.g. motor vehicle, has discoid type electric machine disposed between flywheel and engine block, and implanted around nose of crankshaft and bearing of crankshaft Pending FR2898081A1 (en)

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FR0650726A FR2898081A1 (en) 2006-03-02 2006-03-02 Internal combustion engine i.e. heat engine, for use in e.g. motor vehicle, has discoid type electric machine disposed between flywheel and engine block, and implanted around nose of crankshaft and bearing of crankshaft

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FR0650726A FR2898081A1 (en) 2006-03-02 2006-03-02 Internal combustion engine i.e. heat engine, for use in e.g. motor vehicle, has discoid type electric machine disposed between flywheel and engine block, and implanted around nose of crankshaft and bearing of crankshaft

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63181642A (en) * 1987-01-21 1988-07-26 Toshiro Higuchi Starting and charging device for engine
US5001412A (en) * 1988-09-02 1991-03-19 Chrysler Corporation Alternator starter
DE19600598A1 (en) * 1996-01-10 1997-07-17 Schwarzwaelder Service Ind Und Electric alternator e.g. for motor vehicle lighting, ABS braking, heating and ventilation etc
US6382163B1 (en) * 2000-09-01 2002-05-07 Ford Global Technologies, Inc. Starter alternator with variable displacement engine and method of operating the same
US6543561B1 (en) * 1998-03-31 2003-04-08 Continental Isad Electronic Systems Gmbh & Co. Kg Drive systems for a motor vehicle and methods for operating the same
US20040232702A1 (en) * 2001-09-08 2004-11-25 Lei He Ring type starter/generator
US20050166594A1 (en) * 2004-02-02 2005-08-04 Ranjit Jayabalan Combustion engine acceleration support using an integrated starter/alternator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63181642A (en) * 1987-01-21 1988-07-26 Toshiro Higuchi Starting and charging device for engine
US5001412A (en) * 1988-09-02 1991-03-19 Chrysler Corporation Alternator starter
DE19600598A1 (en) * 1996-01-10 1997-07-17 Schwarzwaelder Service Ind Und Electric alternator e.g. for motor vehicle lighting, ABS braking, heating and ventilation etc
US6543561B1 (en) * 1998-03-31 2003-04-08 Continental Isad Electronic Systems Gmbh & Co. Kg Drive systems for a motor vehicle and methods for operating the same
US6382163B1 (en) * 2000-09-01 2002-05-07 Ford Global Technologies, Inc. Starter alternator with variable displacement engine and method of operating the same
US20040232702A1 (en) * 2001-09-08 2004-11-25 Lei He Ring type starter/generator
US20050166594A1 (en) * 2004-02-02 2005-08-04 Ranjit Jayabalan Combustion engine acceleration support using an integrated starter/alternator

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