Piaggio&c. S.p.a.

Walter Mariotti

Andrea Raffaelli

Luca Carmignani

Paolo Capozzella

Luca Nuti

Jury Cantini

Paolo Nesti

Giacomo Freschi

Alessio Sisi

Emiliano Guidi

Marcello Fiaccavento

Carlo Magagnini

A camshaft for a multi-cylinder internal combustion engine with poppet valves, comprising a main body, which is rotatable with respect to a first rotation axis, a first disk and means of the hydraulic type for varying the timing of said first disk with respect to said main body.

Camshaft with phasing device for multi-cylinder internal combustion engine with poppet valves

A combustion engine for a vehicle includes a first centrifugal device for varying timing of a first plurality of suction or relief valves with respect to the drive shaft. A driving disc is mounted idle on a first camshaft which controls the valves, and at least one driven disc is integral with the camshaft. Drive elements for transmitting motion from the driving disc to the driven disc are interposed between the two discs causing a relative rotation of the driven disc with respect to the driving disc when the rotation speed of the discs exceeds a predetermined threshold. A distribution system connects the drive shaft with the driving disc so as to cause the rotation thereof. A second gear meshes with a first gear so that rotation of the driving disc mounted on the first camshaft causes the rotation of the second camshaft to control other valves of the engine.

Internal combustion engine with camshaft valve phase variation device

A parking brake includes an inhibitor device (), which can be associated with a drive shaft () for rotating therewith, the inhibitor device () being actuated by centrifugal force. The parking brake further includes a locking member () adapted to engage the inhibitor device () when actuated. The inhibitor device () is configured to prevent the engagement of the locking member with the inhibitor device when the inhibitor device rotates at a speed greater than a minimum speed, so as to prevent the application of the parking brake.

Parking brake for a motor vehicle and motor vehicle comprising the parking brake

A combustion engine for a vehicle includes a device for changing the timing of suction/relief valves with respect to the drive shaft. The device includes a first disc idly mounted to the camshaft and has a first side defining first slot tracks. A second disc is integral with the camshaft and includes second slot tracks facing the first side of the first disc. Drive elements transmit motion between the first disc and the second disc and each is accommodated between corresponding two of the partially facing tracks. As centrifugal forces caused by the rotation speed of the camshaft changes, each drive elements moves between a first reference position and a second reference position which are close to and far from the rotation axis of the camshaft, respectively. A phase changer device exerts a force which tends to oppose movement of said drive elements towards the second reference position.

An electric drive motorcycle (), comprises: a front portion comprising one or more front wheels () and a handlebar (); a rear portion comprising a saddle (), a shell body () arranged below said saddle (), and a rear wheel () arranged below said shell body (); an intermediate portion () extending as a connection between said front portion and said rear portion; an electric drive unit () connected to said rear wheel (); a power supply unit feeding said electric drive unit (); and a helmet carrying compartment () placed in the shell body () below the saddle (), wherein said power supply unit is arranged in a position below said helmet carrying compartment (), so that said saddle (), said helmet carrying compartment () and said power supply unit are substantially stacked on each other, being said helmet carrying compartment () and said power supply unit arranged inside the shell body (), wherein said supply unit comprises a battery unit () or a battery unit () and an electric motor/generator, wherein a control unit apt to control said drive unit () and said battery unit () is provided, said control unit comprising a case () arranged below the battery unit (), wherein a rear fork () jointed to the shell body () is provided, said rear fork comprising at least a fork arm () extending between said shell body () and said drive unit (), and wherein said rear fork () is placed beside and/or surrounds said case ().

Electric drive motorcycle

An electric drive motorcycle () allows a suitable configuration of all the components deputed to the electric supply of the motorcycle electric drive, and comprises: a front portion comprising one or more front wheels () and a handlebar (); a rear portion comprising a saddle (), a shell body () arranged below said saddle (), and a rear wheel () arranged below said shell body (); an intermediate portion () extending as a connection between said front portion and said rear portion; an electric drive unit () connected to said rear wheel (); and a hybrid supply unit supplying said electric drive unit (), comprising at least a battery unit () and a combustion engine () actuating an electric generator () apt to supply said battery unit () and/or said electric drive unit (), wherein said shell body () defines a housing space apt to receive at least said battery unit () and said combustion engine (), with the related electric generator (), placed side by side therebetween.

A high performance synchronous transmission to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, comprising on the crankshaft a centrifugal clutch, for the automatic engagement of the first speed above a predetermined rotation regime, and a driving pulley apt to transmit the motion through a subsequent kinematic chain, is provided with a coupling between crankshaft and driving pulley which connects them directly, by determining with its own engagement the exclusion of said centrifugal clutch, said coupling being controlled in disengagement when a control lever is in active position.

High performance synchronous transmission

A synchronous transmission () for a motorcycle comprises a primary shaft () of mechanical gearbox, and a pair of secondary shafts () equipped with one or more secondary gearwheels for transmitting the motion to a hub shaft (), wherein a desmodromic drum () actuates a pair of coupling forks () selectively defining the position of respective sliding couplings () between primary () and secondary shafts () to select all speeds of the transmission, the desmodromic drum () being in phase with a device () for actuating the gearwheels, and wherein the coupling forks () are equipped with a cam follower end () maneuvered by said desmodromic drum () having a cylindrical surface () whereon a single desmodromic track () is formed.

A high performance synchronous transmission to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, having a primary shaft of mechanical gearbox equipped with a primary gearwheel, and a pair of secondary gearwheels equipped with one or more secondary shafts for transmitting the motion to a hub shaft, wherein the primary shaft receives the motion through a driven pulley which receives the motion by a driving pulley connected to the crankshaft, an input clutch being provided on the primary shaft.

A continuously variable transmission device () for a two-wheel, three-wheel or four-wheel motorcycle includes a cam system () operating between a fixed bushing () and a mobile bushing (). The device is configured to obstruct the approach between the active surfaces () or to facilitate the approach of the active surfaces.

Continuously variable transmission device with a device for varying the gear shift curve

An electric drive motorcycle (), allows an effective arrangement of the battery unit thereof, optimizing the available space, and comprises: a front portion comprising one or more front wheels () and a handlebar (); a rear portion comprising a saddle (), a shell body () arranged below said saddle (), and a rear wheel () arranged below said shell body (); an intermediate portion () extending as a connection between said front portion and said rear portion; an electric drive unit () connected to said rear wheel by means of a transmission unit; and a power supply unit feeding said electric drive unit and comprising at least a battery unit (), wherein said battery unit () is shaped so as to have a polyhedral shape comprising at least a first side () tilted with respect to a vertical plane orthogonal to the front-rear direction of the motorcycle (), wherein the battery unit () occupies a position below a helmet carrying compartment () arranged below the saddle (), and wherein the battery unit () extending transversally from side to side in its own portion of a housing space existing in said shell body ().

An electric drive motorcycle () allows a suitable and effective cooling of the battery unit when the electric motor is operated, and comprises: a front portion comprising one or more front wheels () and a handlebar (); a rear portion comprising a saddle (), a shell body () arranged below said saddle (), and a rear wheel () arranged below said shell body (); an intermediate portion extending as a connection between said front portion and said rear portion; an electric drive unit () connected to said rear wheel (); and a hybrid supply unit supplying said electric drive unit (), comprising at least a battery unit () and a combustion engine () actuating an electric generator () apt to feed said battery unit () and/or said electric drive unit (), wherein the combustion engine () drives a cooling fan () arranged so that, when this is drawing a flow of cooling air through an inlet mouth (), such flow wets the battery unit (), before being drawn, wherein the combustion engine () comprises a crankshaft which is arranged transversally to said front-rear direction, said crankshaft having a first end keyed to an electric generator () arranged adjacent to the wall of the shell body (), and a second end thereto said cooling fan () is keyed, and wherein the sucking mouth () of the cooling fan () is faced towards the battery unit ().

A synchronized transmission () used in a motorcycle, wherein a crankshaft actuated by the engine and a driven shaft, connected to a rear wheel, are substantially parallel and kinematically connected therebetween, comprising a first axial actuation synchronizer () placed at the front of the crankshaft () and a second axial actuation synchronizer () arranged at the front of a driven shaft kinematically connected to a rear wheel, each synchronizer () comprising a respective rotating cam actuator () having a cam () apt to be rotated by a respective cam spindle () by determining a translation thereof which interferes with an actuation end of the respective synchronizer ().

Synchronized transmission

An electric drive motorcycle () is competed with a filter box in the rear portion thereof, without limiting the space available for the batteries, comprises: a front portion comprising one or more front wheels and a handlebar; a rear portion comprising a saddle (), a shell body arranged below said saddle (), and a rear wheel arranged below said shell body; an intermediate portion extending as a connection between said front portion and said rear portion; an electric drive unit () connected to said rear wheel (); and a hybrid supply unit supplying said electric drive unit (), comprising at least a battery unit () and a combustion engine () actuating an electric generator (), said combustion engine () comprising an exhaust duct () with an expansion chamber () and a filter box () for feeding air to the combustion engine (), wherein said electric generator () is apt to supply said battery unit () and/or said electric drive unit, wherein, inside the shell body () and below the saddle (), a housing space is provided extending from one side to the other one of the shell body () and which receives the hybrid supply unit, in a first portion thereof, and wherein said filter box () and said exhaust duct () are arranged on the same side of the motorcycle.

A CVT transmission device () comprises a drive pulley () provided with a mobile bushing (), a fixed bushing (), a cam system () comprising at least one driven cam portion () of mobile bushing () and a cam portion () of the fixed bushing (). The mobile bushing () comprises a main wall () annular with respect to the axis of rotation (X), having an inner surface () which delimits a housing compartment () and said driven cam portion () protrudes radially internally from said inner surface (). The drive cam portion () of the fixed bushing () is suitable to penetrate axially in said housing compartment of the mobile bushing ().

Growing community of inventors

Pontedera, Italy

Walter Mariotti