Other

Mce 5 Development

Rabhi, Vianney

Vianney Rabhi

Bruno Toulouse

Sylvain Bigot

Philippe Dury

The friction insert for oriented valve is intended for a valve-controlled ignition prechamber and includes an external valve body guide cylindrical bearing surface which is arranged at the periphery of a valve having a guide pin and which slides with a small clearance into a first valve body guide, the insert also including an external pin guide cylindrical bearing surface which is arranged at the external periphery of an orientation pin and which slides with a small clearance into a second orientation pin guide, the valve body guide and orientation pin guide being resistant to abrasive wear and being fixedly mounted in a non-magnetic prechamber tip in which they guide and orient the valve having a guide pin.

Friction insert for oriented valve

The multi-temperature double-acting piston includes a peripheral sealing ring, a lower hot crown and/or an upper hot crown, and moves in translation in a cold cylinder of a heat engine which includes a lower cylinder head and an upper cylinder head, the piston including a central piston pin the lower piston rod of which passes through the lower cylinder head so as to be connected to a power transmission housed in a transmission casing, and the upper piston rod of which passes through the upper cylinder head so as to open out into a piston cooling and lubricating chamber, a lubricating-cooling gallery provided in the pin putting the chamber in communication with the casing via an internal piston volume.

Multi-temperature double-acting piston

Reciprocating heat engine with hot cylinder head and cold cylinder includes a cooled cylinder casing which receives a cold cylinder covered with a lubricant film and in which a piston connected to power transmission moves in translation to form a variable-volume hot chamber with a hot cylinder head which is held applied but free to expand on the cylinder casing by cylinder head applying unit, while a hot crown is interposed between the chamber and the piston and is held applied but free to expand on the piston by crown applying unit, the piston including a cooled piston sealing ring which has a piston sealing unit.

Reciprocating heat engine with hot cylinder head and cold cylinder

The stud-oriented valve () includes a valve main body () which is housed in a lamination duct () and which exhibits a closure axial face () which can rest on a duct closure seat () for isolating a lamination cavity () from a combustion chamber (), said body () also having a centering peripheral surface (), an opening axial face () which may rest on a chamber-side valve stop (), and at least one orientation stud () which protrudes from the opening axial face (), said stud () being capable to slide through a guide axial orifice () that is fixed to the lamination duct ().

Guide stud valve

The hydraulic piston with a depressurized groove is capable of translating in a cylinder and includes a fixed skirt, an axial compression face which forms with the cylinder a fluid chamber, and an axial working face which cooperates with a transmission; the piston also includes a seal, a depressurized radial groove emerging onto the surface of the fixed skirt, an axial decompression duct fitted inside the skirt which emerges in the vicinity of the axial working face, and a radial decompression duct which depressurizes the radial groove in communication with the axial decompression conduit.

Hydraulic piston with a depressurized groove

The valve plate () with free micro-balls allows a fluid () to flow from an upstream volume () to a downstream volume () and not in the reverse direction, and comprises a circulation plate () crossed through by a circulation orifice () terminated by a micro-ball seat (), a permeable guide plate () parallel to said plate () being crossed through by a guide cylindrical orifice () which houses a micro-ball () which rests on said seat () so as to close said orifice () or rests on a permeable micro-ball stop abutment (), a spacer () being interposed between said plate () and said plate (), a discharge passageway () crossing through said plate () to allow the fluid () to flow when the micro-ball () does not rest on said seat ().

Valve plate with free micro-balls

The valve ignition prechamber () with a reversed direction of combustion includes a lamination cavity () in which opens a pilot charge injector (), and said cavity () being connected to a combustion chamber () of an internal combustion engine by a lamination duct (), which, when opened by a lamination valve (), forms with the latter a torch-ignition prechamber while an inverter housing () containing an ignition pilot charge () and accommodating ignition means () is housed in the lamination cavity () with which it forms a late combustion volume, said housing () comprising a main ejection nozzle () which can emit a pre-ignition torch in the direction of the lamination duct (), the volume swept by said torch forming an early combustion volume.

Valve ignition prechamber with a reversed directon of combustion

The forced recirculation mixer () consists of a stirring enclosure () whose internal cavity forms a recirculation loop () in which circulates a homogeneous gas mixture () formed by a gas () to be mixed and a vaporizable liquid () respectively introduced into that loop () via a gas inlet duct () and a liquid injection nozzle (), gas drawing-off means () being capable of withdrawing a homogeneous gas mixture () from the stirring enclosure () via a mixture draw-off duct () and a stirring turbine () driven by a turbine motor () forcing the homogeneous gas mixture () to circulate in the recirculation loop ().

Forced recirculation mixer

The articulated plenum () forms an intake pipe () which is ended with tight ball joint links () held by restraining means (), said plenum () connecting a heat source () to an expansion cylinder () and including a plenum inlet orifice (), a plenum outlet orifice () which receives a valve seat (), and an actuator orifice () which receives an intake valve actuator () which controls a valve (), the latter engaging with the valve seat () to close the intake pipe ().

Articulated plenum for transfer-expansion-regeneration combustion engine

The ignition insert with an active pre-chamber () comprises an insert well () arranged in a cylinder head () of an internal combustion engine (), said well () accommodating a cylindrical insert body () which is indexed in rotation and in which are arranged an ignition pre-chamber (), an insert spark plug well () receiving a spark plug (), and a injector radial orifice () which is aligned with a injector lateral well () arranged in the cylinder head () so as to receive an injector nose (), said body () being terminated by a pre-chamber nose () opening into a combustion chamber (), and being held in the insert well () by fixing means () cooperating with clamping means ().

Ignition insert with an active pre-chamber

The regenerative cooling system () is provided for a regenerative heat engine () and comprises a cooling chamber () which surrounds a gas expander (), leaving open a gas circulation space () between said chamber () and said expander (), a working gas () expelled from the gas expander () circulating in said space () before returning to a regenerative heat exchanger () where it is cooled, a large portion of the heat of said gas () being reintroduced into the thermodynamic cycle of the regenerative heat engine ().

Regenerative cooling system

The fluid-cushion sealing device () for a piston () moving in a cylinder () and defining with the latter a chamber to be sealed () includes: a continuous perforated ring () through the radial thickness of which passes a calibrated opening () and which is sealingly accommodated in a ring groove () provided in the piston () so as to define, with said groove (), a pressure distribution chamber () connected to a pressurized fluid source (), while an axially blind counter-pressure recess () is provided recessed on an external cylindrical ring surface () which faces the cylinder () and which the continuous perforated ring () comprises, the calibrated opening () leading into said recess ().

Fluid-cushion sealing device

The magnetic valve recoil device is intended for a valve-type ignition pre-chamber having a stratification cavity connected by a stratification pipe, which a stratification valve can close, to a combustion chamber housing a primary charge, a stratification injector, and an ignition unit leading to the cavity in order to inject and ignite an initiator charge so as to ignite the primary charge via a torch ignition pre-chamber formed by the stratification valve with the stratification pipe when it is not closing the latter, the valve being otherwise kept in contact with the pipe by a magnetic field created by a magnetic field source.

Magnetic valve recoil device

The hydraulic piston () constitutes a hydraulic chamber () with a cylinder () and has a cylindrical body () connected&#x2014;from the side of the chamber ()&#x2014;by a link-stop valve () to a cooling and lubricating gasket valve () which is passed right through by a flow calibration opening (), the valve () being able to move in longitudinal translation over a short stroke with respect to the body () or to be held at a distance from the body () by the valve link-stop (), a valve return spring () tending to move the valve () away from the cylindrical body ().

Hydraulic piston with a cooling and lubricating gasket valve

A regenerative valve hydraulic actuator includes a high-pressure accumulator fed by a high-pressure feed hydraulic pump, an actuator defining an actuator hydraulic chamber for actuating&#x2014;by way of a progressive lever arm ratio lever&#x2014;a valve provided with a valve return device, a valve lifter hydraulic valve placed between the high-pressure accumulator and the actuator hydraulic chamber, a lifter check valve which connects a low-pressure accumulator to the actuator hydraulic chamber, a valve closure hydraulic valve placed between the chamber and a closure and regeneration hydraulic motor which recovers energy previously invested to open the valve.

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Lyons, France

Vianney Rabhi