Other

Etat Francais

The French State

S.n.c. Melchior Technologie

Etat Francais Represente Par Le Delegue General Pour L'armament

The Franch State

Societe Pour Le Developpement De La Suralimentation Hyperbar

Jean F Melchior

Thierry M Andre

Henri B Edelmann

Michel De De Boisjean

Alain Dourille

A device for controlling at least one valve, the device comprising a body having a non-deformable cavity communicating exclusively with the outside via at least four rectilinear cylinders that are closed respectively by an opening piston (P) actuated by an opening cam (C), a closing piston (P) actuated by a closing cam (C), a shuttle piston (Pa) serving to load or unload the device, and a piston (Ps) that is mechanically connected to the valve. By adjusting the angular phase shift between the opening and closing cams (C, C), the control device of the invention makes it possible in operation to adjust the lift of the valve, the angular duration of the opening of the valve, and if necessary, to deactivate the valve completely throughout the duration of a cycle.

Device for the variable control of at least one valve, for example for a reciprocating engine

Turbocharger supercharged internal combustion engine, of which the exhaust manifold () comprises a first outlet () constantly supplying a turbine () for driving a compressor (), a second outlet () equipped with means of sealing () synchronized with the rotation of the engine in order to supply a recycling conduit () of exhaust gas and a third outlet connected by a by-pass conduit () at the outlet of the turbine ().

Supercharged internal combustion engine

This device is designed for a piston which is designed to move in alternating linear movement parallel to the axis of a chamber divided by the piston into a high pressure volume and a low pressure volume, and is of the type comprising: According to one aspect of the invention the ring is designed to determine the size of a lubricating oil film between the ring and the sliding surface to a limit lubricating thickness preferably from 0.1 &#x3bc;m to 1 &#x3bc;m when it moves from the high pressure volume to the low pressure volume.

Sealing device

A loop-scavenged two-stroke internal combustion engines with an intake valve (,) engaging a seat (,) for fresh air intake, and an exhaust valve (,) engaging a seat (,) for combustion gas exhaust, is disclosed. The valves are arranged in such a way that the fresh air intake scavenges a substantial part of the burnt gases. In at least one of the valves, the valve surface (,) located downstream from the valve face (,) and the surface (,) of the downstream extension of the seat (,) are configured in such a way that they form a substantially isentropic diffuser.

Loop-scavenged two-stroke internal combustion engines

Liquid fuel injecting device for internal combustion engine

Device for lubricating an assembly between two mechanical components

One of the driving and driven parts of the coupling is connected to a cylinder (10) and the other to a piston (11) which delimit therebetween two antagonistic chambers (13, 14). The chambers have a substantially constant volume, are filled with a practically incompressible hydraulic liquid, and are interconnected through two unidirectional circuits (18, 19) which have opposite directions and each a substantially constant volume. A distributing device (22) is so arranged as to either bring into action one or the other of the unidirectional circuits, or to neutralize both of them.

Coupling for the transmission of alternating torques

Internal combustion engines with a cylindrical working chamber (1) in which there slides a piston (3), and which is closed by a cylinder head (4) with a device (5) for injecting atomized liquid fuel under high pressure and operating on the two-stroke cycle with a loop-scavenging system across the cylinder head, with two axisymmetric valves with coincident axes, one of these, an external, inlet valve (7) interacting with a seat (15) in the cylinder head and the other, an exhaust valve (6), exhibiting a tubular shape with a bearing surface applied against a seat (16) formed at the lower part of the inlet valve (7), the inlet valve opening towards the working chamber and the exhaust valve opening in the opposite direction, in order to delimit an exhaust passage (8) between them, the injection device (5) emerging in the working chamber substantially at the centre of a central hub (21) borne by the cylinder head and about which the exhaust valve (6) slides.

Internal combustion engines

Induction method for a compression-ignition internal combustion engine

One of the driving and driven parts of the coupling is connected to a cylinder and the other to a piston which delimit therebetween two antagonistic chambers. The chambers have a substantially constant volume, are filled with a practically incompressible hydraulic liquid, and are interconnected through two unidirectional circuits which have opposite directions and each a substantially constant volume. A distributing device 22 is so arranged as to either bring into action one or the other of the unidirectional circuits, or to neutralize both of them.

Variable phase coupling for the transmission of alternating torques

Fuel injection device for an internal combustion engine, and engine equipped with such a device. The device includes a first cavity (3) forming part of a fuel pressurizing member (3, 4, 5), and a second cavity (12) made in an injector (9), in which cavity the pressure tends to lift a movable needle (11), against the action of the pressure in an accumulator (20), transmitted by a pipe (35). The first cavity (3) is separated from the second cavity (22) by a one-way valve (30).

Liquid fuel injection device for an internal combustion engine, and

A piston for a combustion engine includes an external cylindrical body having an inner cavity. In the inner cavity is a partly spherical little-end of a connecting rod and a fluidtight shell or hemispherical dome. An edge portion of the dome is annularly connected a lower part of the cylindrical body so that the shell or dome bears on the little-end along a closed circular contact line or band during rest or minimum pressure parts of the cycle of operation. Oil is supplied under pressure and through a check valve to into an interstice between the little-end and the shell above the contact line. An upper incompressible space is provided between an outer surface of the shell and the cavity. The shell is maintained taut in operation between the little-end and an annular zone by which the edge portion is connected to the lower part of the cylindrical body. The shell is sufficiently thick but resilient to ensure that the shell is capable 1) of transmitting to the little-end the forces exerted by the working gas on the piston through the annular zone, and 2) of deforming under a tension resulting from these same forces, so that the volume of the interstice is cyclically reduced and the area of the contact band increases.

Growing community of inventors

Paris, France

Jean F Melchior