Abrégé

A starting device for a general-purpose engine according to one embodiment includes: a starter motor; a pinion gear mounted on an output shaft of the starter motor; a camshaft gear mounted on a camshaft; a crankshaft gear mounted on a crankshaft and meshing with the camshaft gear; and a gear assembly configured to transmit a driving force of the starter motor via the pinion gear to the camshaft gear and configured not to transmit a driving force of the camshaft gear to the pinion gear. The pinion gear, the camshaft gear, the crankshaft gear, and the gear assembly are disposed in a crankcase in a state where the pinion gear meshes with a gear included in the gear assembly.

Classes IPC  ?

• F02N 15/02 - Liaison entre les moteurs de démarrage et les moteurs principauxLeur accouplement ou désaccouplement

Abrégé

A startup failure determination/detection device comprising: an acquisition unit configured to acquire a measured temperature value from a temperature sensor for measuring the temperature of an ignition coil of an engine; and a detection unit configured to detect a startup failure in the engine on the basis of a time transition of the measured temperature value.

Classes IPC  ?

• F02M 1/08 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens étant mis automatiquement en service ou hors service
• F02D 45/00 - Commande électrique non prévue dans les groupes

Abrégé

This automatic choke device is used to control the opening degree of a choke valve provided to an intake passage of an engine, and is provided with an acquisition unit configured so as to acquire the engine temperature measured by a first temperature sensor and an outside air temperature measured by a second temperature sensor, and an opening degree control unit configured so as to control the opening degree of the choke valve on the basis of the engine temperature and the outside air temperature.

Classes IPC  ?

• F02M 1/10 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens étant mis automatiquement en service ou hors service en fonction de la température du moteur, p. ex. munis d'un thermostat
• F02D 41/06 - Dispositions de circuits pour produire des signaux de commande introduisant des corrections pour des conditions particulières de fonctionnement pour le démarrage ou le réchauffage du moteur
• F02M 1/02 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens consistant en un étranglement pour enrichir le mélange de combustible et d'air

Abrégé

This battery unit mounting structure comprises: a box-like case attached to an engine or to a work machine on which the engine is mounted; a battery unit which is accommodated in the case and serves as a power supply source for a cell motor provided to the engine; and a cover which covers an opening of the case in which the battery unit is accommodated.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs
• F02N 11/00 - Démarrage des moteurs au moyen de moteurs électriques
• F02N 11/12 - Démarrage des moteurs par des groupes de démarrage mobiles, p. ex. portatifs
• H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
• H01M 50/20 - MonturesBoîtiers secondaires ou cadresBâtis, modules ou blocsDispositifs de suspensionAmortisseursDispositifs de transport ou de manutentionSupports

Abrégé

This start control device for an engine comprises a start operation control unit for causing a cell motor to perform cranking of the engine for at least a preset fixed cranking time, only when an engine start operation switch that connects to a relay for turning ON/OFF a power supply to the cell motor has been continuously operated in excess of a preset erroneous-operation determination time.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs

Abrégé

An engine control device comprises: an interval control unit which, when a start operation is performed by the engine start operation switch and electricity is supplied from a battery to a starter motor, invalidates the start operation, performed by the engine start operation switch, within a predetermined interval period; a driving state determination unit that determines that the engine is in a driving state when detection of power generation input by an engine is started within the interval period and the voltage and current of the power generation input exceed predetermined thresholds; an erroneous operation prevention unit that invalidates the start operation performed by the engine start operation switch when the driving state determination unit determines that the engine is in the driving state; and a safety control unit which, if the power generation input is interrupted for longer than the predetermined period in a state in which a control ECU is started, determines that the engine is in a stopped state and continues to invalidate the start operation performed by the engine start operation switch.

Classes IPC  ?

• F02N 15/00 - Autres appareils de démarrage actionnés par une énergie non musculaireParties constitutives, détails ou accessoires non couverts dans les groupes ou présentant un intérêt autre que celui visé par ces groupes
• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs

Abrégé

This engine start control device is provided with: a control ECU that causes a starter motor to crank an engine; and a temperature sensor that measures the surface temperature of an engine starting battery that serves as an electricity supply source for the starter motor. The control ECU includes: a locking determination unit that, if within a designated time determined in advance from the start of the control ECU, the surface temperature of the engine starting battery has risen by a designated temperature, determined in advance, or more from the temperature at the start of the control ECU, determines that the starter motor has locked; and a starting halt unit that, if the lock determination unit determines that locking has occurred, halts cranking of the engine by the starter motor.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs
• F02B 77/08 - Dispositifs de sécurité, d'indication ou de surveillance

Abrégé

This engine start-up control device comprises: a control ECU which causes a starter to crank an engine; and a current sensor which measures a supply current to the starter. The control ECU includes a lock determination unit which determines that the starter is locked when a state in which the supply current to the starter measured by the current sensor is at a predetermined current value or higher continues for a predetermined first time period or longer and a start-up stop unit which stops the starter from cranking the engine when the lock determination unit determines that the starter is locked.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs

Abrégé

A hunting detection device of the present disclosure is for detecting hunting in an engine equipped with a carburetor. The hunting detection device comprises: an acquisition unit that is configured to acquire the engine speed and the outside air temperature which is measured by a temperature sensor; a detection unit that is configured to detect hunting if a speed fluctuation state in which the outside air temperature is equal to or below a first reference value is detected; and an opening degree controller that is configured to control the opening degree of a choke valve provided to an intake passage of the engine. If the detection unit detects hunting, the opening degree controller executes closing control to reduce the opening degree of the choke valve.

Classes IPC  ?

• F02M 1/10 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens étant mis automatiquement en service ou hors service en fonction de la température du moteur, p. ex. munis d'un thermostat
• F02D 41/06 - Dispositions de circuits pour produire des signaux de commande introduisant des corrections pour des conditions particulières de fonctionnement pour le démarrage ou le réchauffage du moteur

Abrégé

A general-purpose engine starting device according to an embodiment is provided with: a starter motor; a pinion gear attached to an output shaft of the starter motor; a camshaft gear attached to a camshaft; a crankshaft gear which is attached to a crankshaft and which meshes with the camshaft gear; and a gear assembly configured in such a way as to transmit the starter motor driving force that has passed through the pinion gear to the camshaft gear, and not to transmit the camshaft gear driving force to the pinion gear. The pinion gear, the camshaft gear, the crankshaft gear, and the gear assembly are arranged in a crank case with the pinion gear and the gears contained in the gear assembly in a meshed state.

Classes IPC  ?

• F02N 15/02 - Liaison entre les moteurs de démarrage et les moteurs principauxLeur accouplement ou désaccouplement

Abrégé

This protection control device for an engine starting battery is a protection control device for an engine starting battery which is a power source of a starter motor that cranks an engine, the protection control device comprising: a control ECU which controls the charging/discharging of one or more battery cells constituting the engine starting battery; and a protection circuit which protects the one or more battery cells from overcharging and overdischarging, wherein the control ECU limits the supply of electricity to the starter motor, if the battery voltage when the engine switch is turned on is lower than a first predetermined value.

Classes IPC  ?

• B60R 16/033 - Circuits électriques ou circuits de fluides spécialement adaptés aux véhicules et non prévus ailleursAgencement des éléments des circuits électriques ou des circuits de fluides spécialement adapté aux véhicules et non prévu ailleurs électriques pour l'alimentation des sous-systèmes du véhicule en énergie électrique caractérisé par l'utilisation de cellules électriques ou de batteries
• H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
• H02J 7/04 - Régulation du courant ou de la tension de charge

Abrégé

A device for protecting a battery for starting an engine, the device comprising: a cell motor relay that has provided thereto a contact point between a cell motor and a cell motor feed terminal of the battery for starting an engine, and that is, in accordance with a command from a control ECU, actuated to close the contact point provided between the cell motor and the cell motor feed terminal; and a battery protection relay that has provided thereto a contact point provided between a battery cell and the cell motor feed terminal, and that is, in accordance with a command from the control ECU, actuated to close the contact point provided between the battery cell and the cell motor feed terminal, wherein, when an engine switch is turned on and if a battery voltage is higher than a predetermined certain value, the control ECU commands the battery protection relay to close the contact point and also commands the cell motor relay to close the contact point, through a starting operation of an engine-starting operation switch.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs

Abrégé

This engine startup control device is provided with a control ECU for causing a starter motor to crank an engine, an external device output terminal which is provided in the control ECU to supply electricity to an external device provided outside the control ECU, and an engine startup operating switch which is connected to the control ECU to start the starter motor, wherein the control ECU includes an operation determining unit which determines that the external device is operating if the power being supplied from the external output terminal to the external device is equal to or greater than a predetermined threshold, and a startup restricting unit which restricts the operation of the starter motor if the operation determining unit determines that the external device is operating, even if a startup operation is performed using the engine startup operating switch.

Classes IPC  ?

• F02M 1/10 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens étant mis automatiquement en service ou hors service en fonction de la température du moteur, p. ex. munis d'un thermostat
• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs

Abrégé

e).

Classes IPC  ?

• F02N 3/02 - Autres appareils de démarrage actionnés par la force musculaire comportant un cordon de démarrage
• F16D 41/12 - Roues libres ou embrayages à roue libre avec cliquet articulé coopérant avec des dents, des tenons ou des éléments analogues
• F02N 5/02 - Appareils de démarrage comportant un stockage mécanique de l'énergie du type "à ressort"
• F16H 33/02 - Transmissions rotatives à accumulateurs mécaniques, p. ex. poids, ressorts, volants, en prise de manière intermittente
• F16D 43/16 - Embrayages automatiques à commande interne actionnés entièrement mécaniquement commandés par la vitesse angulaire avec masses centrifuges actionnant directement les organes d'embrayage dans une direction qui a au moins une composante radialeEmbrayages automatiques à commande interne actionnés entièrement mécaniquement commandés par la vitesse angulaire avec masses centrifuges constituant elles-mêmes les organes d'embrayage les organes d'embrayages ayant des parties en prise l'une avec l'autre
• F02N 15/02 - Liaison entre les moteurs de démarrage et les moteurs principauxLeur accouplement ou désaccouplement

Abrégé

An engine is equipped with a starter motor which is attached to an engine main body and is configured to perform cranking of a crankshaft. The engine is further equipped with a battery pack (37). The battery pack is equipped with a lithium-based cell which is attached to the engine main body and which is configured to supply electric power which drives the starter motor.

Classes IPC  ?

• F02N 11/08 - Circuits spécialement adaptés pour le démarrage des moteurs
• F02N 3/02 - Autres appareils de démarrage actionnés par la force musculaire comportant un cordon de démarrage
• F01P 1/06 - Disposition du refroidissement d'autres parties des moteurs ou "machines"
• F02N 11/00 - Démarrage des moteurs au moyen de moteurs électriques
• F02B 67/00 - Moteurs caractérisés par l'agencement d'appareils auxiliaires non prévu ailleurs, p. ex. un appareil ayant des fonctions différentesEntraînement non prévu ailleurs de ces appareils auxiliaires par les moteurs

Abrégé

A recoil starter (103) is provided with a pull rope reel (22), a ratchet wheel (31), a pulley (32), ratchet pawls (33), and an outer wall (32e). Each of the ratchet pawls (33): can oscillate between an engagement position where the ratchet pawl (33) engages with a protruding part (31a) and a non-engagement position where the ratchet pawl (33) does not engage with the protruding part (31a); and is always urged toward the engagement position. A supporting surface (32d) of the outer wall (32e) supports the base end part of each of the ratchet pawls (33) when the ratchet pawl 33 is at the engagement position. A foreign matter discharge part (32f) of the outer wall (32e) connects the inner space of the pulley (32) and the outer space of the pulley (32).

Classes IPC  ?

• F02N 3/02 - Autres appareils de démarrage actionnés par la force musculaire comportant un cordon de démarrage
• F16D 41/12 - Roues libres ou embrayages à roue libre avec cliquet articulé coopérant avec des dents, des tenons ou des éléments analogues

Abrégé

This fuel tank is provided with a fuel tank body for accommodating engine fuel, and a resilient member provided on a bottom surface of the fuel tank body. The resilient member includes at least one protruding portion which is provided protruding downward and which has a ground-contacting surface which comes into contact with the ground. In addition, the resilient member has a shape which is asymmetric in the axial direction of an engine crankshaft, and/or in a horizontal direction which is orthogonal to said axial direction. The fuel tank may be provided with two resilient members having mutually different moduli of elasticity.

Classes IPC  ?

• F02M 37/00 - Appareils ou systèmes pour transférer le combustible liquide des réservoirs de stockage aux carburateurs ou aux injecteursDispositions d'épuration du combustible liquide spécialement conçues pour les moteurs à combustion interne ou aménagées sur ceux-ci
• A01D 34/68 - FaucheusesAppareils de fauchage des moissonneuses caractérisés par des particularités relatives au type d'appareil de coupe comportant des couteaux rotatifs comportant des couteaux tournant autour d'un axe vertical dirigés à la main par un opérateur à pied à couteaux ou à roues entraînés par un moteur

Abrégé

This muffler cover, which is capable of being mounted on an engine in such a way as to cover an exhaust muffler of the engine, includes: a tank-facing surface which is formed in such a way that when the muffler cover is mounted on the engine, the tank-facing surface faces a muffler-side surface of a fuel tank of the engine, across a gap, and which is configured in such a way that, together with the muffler-side surface, the tank-facing surface guides cooling air to an outside air intake port of a cooling fan of the engine; and at least two mutually independent ribs which are formed in such a way as to project from the tank-facing surface toward the muffler-side surface of the fuel tank.

Classes IPC  ?

• F01P 5/06 - Guidage ou conduite de l'air vers ou depuis les ventilateurs
• F02M 35/06 - Épurateurs d'air spécialement aménagés par rapport au moteurLeur montage sur celui-ci combinés ou associés avec la soufflante ou le ventilateur du moteur ou avec le volant
• F02B 63/00 - Adaptations des moteurs pour entraîner des pompes, des outils tenus à la main ou des génératrices électriquesCombinaisons portatives de moteurs avec des dispositifs entraînés par des moteurs
• F01N 13/14 - Silencieux ou dispositifs d'échappement caractérisés par les aspects de structure comportant une isolation thermique

Abrégé

An air cleaner in a two-stroke engine having an air supply passage and an air/fuel mixture supply passage includes: a first air passage and a second air passage arranged in parallel, the first air passage being communicated with the air supply passage and the second air passage being communicated with the air/fuel mixture supply passage; and a choke valve opening and closing both of the first air passage and the second air passage of the air cleaner. The choke valve has a pivot axis and a pivotable valve member pivoting about the pivot axis to open and close respective inlet openings of the first air passage and the second air passage. One of the first air passage and the second air passage that is located closer to the pivot axis has an inlet opening flattened along a pivoting edge of the valve member.

Classes IPC  ?

• F02B 25/00 - Moteurs caractérisés par l'utilisation d'une charge neuve pour balayer les cylindres
• F02M 35/024 - Épurateurs d'air faisant usage de filtres, p. ex. humides
• F02M 17/34 - Autres carburateurs combinés ou associés avec d'autres appareils, p. ex. avec des filtres à air
• F02M 1/02 - Carburateurs avec moyens permettant le démarrage ou le ralenti au-dessous des températures normales de fonctionnement ces moyens consistant en un étranglement pour enrichir le mélange de combustible et d'air
• F02B 75/02 - Moteurs caractérisés par leurs cycles, p. ex. à six temps
• F02B 25/22 - Moyens pour réduire le mélange de la charge et des résidus de la combustion ou pour empêcher la fuite de la charge neuve à travers les orifices d'échappement, non couverts par les groupes ou présentant un intérêt autre que celui visé par ces groupes par coussin d'air entre la charge et les résidus de la combustion

Abrégé

A scavenging passage structure for a two-stroke engine, having a scavenging passage communicating a scavenging port provided in a cylinder with a crank chamber formed inside a crankcase, the scavenging passage being formed to extend through respective fastening surfaces of the cylinder and the crankcase. The scavenging passage includes a cover member attached inside the crankcase to be in contact with an inner wall surface of the crankcase, and a groove formed in at least one of the inner wall surface of the crankcase contacting the cover member, and the cover member contacting the inner wall surface of the crankcase, the groove forming part of the scavenging passage connecting to the crank chamber and to an upper face of the crankcase.

Classes IPC  ?

• F02B 25/00 - Moteurs caractérisés par l'utilisation d'une charge neuve pour balayer les cylindres
• F02B 33/12 - Moteurs avec pompes à piston alternatifMoteurs avec pompes sous carter de l'arbre-manivelle avec pompes à piston alternatif autres que les pompes simples sous carter de l'arbre-manivelle avec le cylindre de pompage situé entre le cylindre moteur et le carter de l'arbre-manivelle ou avec le cylindre de pompage entourant le cylindre moteur la face arrière du piston moteur agissant comme organe de pompage en conjonction avec une chambre de pompage isolée du carter de l'arbre-manivelle, la bielle du piston moteur passant à travers la chambre de pompage et travaillant en conjonction avec un organe mobile d'isolement
• F02B 33/00 - Moteurs caractérisés par l'utilisation de pompes d'alimentation ou de balayage

Abrégé

Providing an engine speed control device and an engine speed control method, wherein the no-load condition of the farm working machine can be estimated independently of the farm working machine and a no-loading operation condition of the engine can be automatically shifted to an idling condition. An engine speed control device with which the engine drives a farm working machine, the engine speed control device provided with: a memory section 8 in which the throttle opening threshold levels corresponding to the target engine speeds are memorized; a first judgment device that reads out the throttle opening threshold level corresponding to the target engine speed from the memory device, and judges whether or not the current throttle opening threshold level is smaller than or equal to the throttle opening threshold level corresponding to the target engine speed; a target engine speed determining section 16 by which the target engine speed diminishes to a low idling engine speed in a case where the first judgment device judges that the current throttle opening threshold level is smaller than or equal to the throttle opening threshold level corresponding to the target engine speed; and, a throttle opening regulating device 14 that regulates the opening of the throttle valve based on the target engine speed.

Classes IPC  ?

• F02D 31/00 - Utilisation de régulateurs non électriques sensibles à la vitesse pour commander les moteurs à combustion, non prévue ailleurs
• F02M 3/09 - Soupapes sensibles à des paramètres du moteur, p. ex. à la dépression à l'admission
• F02D 29/00 - Commande de moteurs, cette commande étant particulière aux dispositifs entraînés, ces dispositifs étant autres que des organes ou accessoires essentiels à la marche du moteur, p. ex. commande de moteur par des signaux extérieurs
• F02D 41/02 - Dispositions de circuits pour produire des signaux de commande
• F02D 41/08 - Dispositions de circuits pour produire des signaux de commande introduisant des corrections pour des conditions particulières de fonctionnement pour le ralenti
• F02D 11/10 - Dispositions ou adaptations pour le déclenchement non automatique de la commande du moteur, p. ex. démarrage par l'opérateur caractérisées par des liaisons non mécaniques de la commande, p. ex. par des liaisons de commande à fluide ou par des liaisons de commande à relais de puissance ou puissance assistée électriques

Abrégé

A zero-governor fitting structure for a gas engine, configured in such a manner that the lower half of a fuel tank for a gasoline engine is utilized as a support box for supporting the zero-governor in which a gas supply inlet pipe and a zero governor can be reliably mounted with vibration and heating of the zero-governor avoided. A zero-governor mounting structure for a gas engine equipped with a zero-governor is provided with a support box fixed to the upper part of the gas engine. The support box is formed as a box having two depths. The zero-governor is supported, through a vibration insulation gasket, on the bottom plate of the shallower depth space of the support box. A gas supply inlet pipe and an elbow joint which is connected to the gas supply inlet pipe and can be bent the direction of the gas flow at a right angle toward the zero-governor are received in the deeper depth space, and the elbow joint is connected to the bottom inlet of the zero-governor.

Classes IPC  ?

• F02M 37/00 - Appareils ou systèmes pour transférer le combustible liquide des réservoirs de stockage aux carburateurs ou aux injecteursDispositions d'épuration du combustible liquide spécialement conçues pour les moteurs à combustion interne ou aménagées sur ceux-ci

Abrégé

s, the an oil discharge device being arranged at an upstream side of a gas mixer 110 mixing the fuel gas with the intake air for the engine, the upstream being in relation to the intake air; the outlet regarding the air from the oil mist separator communicates with an air inlet of the air cleaner 25 for the engine intake air, through a breathing pipe 5.

Classes IPC  ?

• F01M 13/04 - Ventilation ou aération du carter par des moyens épurant l'air avant qu'il ne sorte du carter, p. ex. des séparateurs d'huile

Abrégé

In this multipurpose engine, a fuel gas evaporated within a fuel tank of the engine is drawn out of the fuel tank and is adsorbed by an adsorbing material, the fuel gas is separated from the adsorbing material, and then the fuel gas separated from the adsorbing material is suctioned into an intake system of the engine by using negative pressure inside the intake system. The adsorbing material is accommodated in a canister, and two connection ports used for connection with the canister are respectively provided at a heat-insulating intake pipe between a carburetor and the engine and at a clear section of an air cleaner.

Classes IPC  ?

• F02M 33/04 - Remise en circuit dans la conduite d'admission
• F02M 33/02 - Autres appareils pour traiter l'air comburant, le combustible ou le mélange air-combustible pour recueillir et remettre en circuit le combustible condensé

Abrégé

A stratified scavenging two-stroke cycle engine with the check valve for introducing scavenging air simplified in construction is provided. The gasket between the flange part forming an air supply chamber and a mixture passage at a side of the cylinder and the passage connecting member having an air flow passage and a mixture flow passage is composed to have an integral leaf valve for allowing air in the air flow passage in the passage connecting member to flow only toward the air supply chamber which is connected to the scavenging passages of the engine so that the gasket has a function as a seal member and that as a check valve.

Classes IPC  ?

• F02B 25/00 - Moteurs caractérisés par l'utilisation d'une charge neuve pour balayer les cylindres

Abrégé

A structure of crankcase-integrated cylinder block for a small internal combustion engine is posed to increase strength and rigidity in order to reduce particularly vibration and noise. A cylinder part and a crankcase part are formed into a box-like shape being cast in one piece, a crankcase cover is fixed to the crankcase part to cover an opening on a side in anteroposterior thereof, a crankshaft bearing boss has a crankshaft bearing hole being provided at a central part of a back wall of the crankcase part to protrude to both inner and outer sides of the back wall for supporting an end sides of a crankshaft, wherein an inner peripheral rib is formed along the corner where the back wall of said crankcase part connects to a peripheral wall extending from the periphery of the back wall to heave inward form the corner part.

Classes IPC  ?

• F02F 1/00 - CylindresCulasses de cylindres
• F02F 7/00 - Carcasses de moteur, p. ex. carters

Abrégé

The invention provides a method and construction of vibration control supporting a cooling fan cover. In a forcer-air-cooled engine having a cooling fan cover fixed directly by means of fixing bolts to the cylinder block at fixing foot parts provided at a peripheral border of the fan cover, band-like vibration damping members are disposed between the peripheral border of the fan cover and the cylinder block in each region of the peripheral border belonging to each sector part defined between two adjacent fixing points of two adjacent fixing foot parts among said plurality of fixing foot parts respectively so that each of said damping members is pressed against the cylinder block by each region of the peripheral border when the bolts are tightened, said band-like damper members are flexible damping members each of which is disposed in an essential part of loop of vibration of the periphery for preventing generation of noise due to vibration of the fan cover with the fixing points as nodes of vibration resonating to cylinder block vibration, and said band-like flexible vibration damping members are adjusted thereby to adjust elastic force and damping capacity of the damping members so that resonance of the fan cover occurs at a rotation speed of engine higher than normal rotation speed thereof.

Classes IPC  ?

• F01P 1/02 - Disposition du refroidissement des cylindres ou des hauts de cylindres, p. ex. canalisation de l'air depuis sa source de mise en pression jusqu'aux cylindres ou le long des cylindres
• F01P 7/04 - Commande du débit de l'agent de refroidissement l'agent de refroidissement étant de "l'air de refroidissement" en faisant varier la vitesse de la pompe, p. ex. en changeant le rapport de son entraînement

Abrégé

A forced-air-cooled engine has a main blow-out opening provided to a back plate of a cooling fan cover at a position facing a cylinder part for blowing out cooling air for cooling a cylinder part and a secondary blow-out opening provided to the back plate at a position opposite to the main blow-out opening in regard to the crankshaft center for cooling a part of a crankcase part, wherein a cooling air guide cover is equipped which is composed of a cylinder air-guide cover part which guides air blown out from the main blow-out opening to flow to cool the cylinder part and cylinder head, and a top cover part which guides air blown out from the secondary blow-out opening to flow along a side face of the crankcase part to cool there and then flow into midstream of the cooling air flow blown out from the main blow-out opening and cooling the cylinder part and cylinder head.

Classes IPC  ?

• F01P 1/02 - Disposition du refroidissement des cylindres ou des hauts de cylindres, p. ex. canalisation de l'air depuis sa source de mise en pression jusqu'aux cylindres ou le long des cylindres