Abstract: A two-stroke or four-stroke internal combustion engine operates by admitting a carburated mixture or by admitting fresh air with the direct or indirect injection of fuel. The engine has at least one cylinder, which defines a variable-volume combustion chamber in which an engine piston, coupled by a connecting rod to the wrist pin of a crankshaft, executes a reciprocating movement. A compressor associated with each cylinder to supercharge the cylinder with carbureted mixture or with fresh air has at least one stage and, in the compression chamber, a compressor piston moves and is coupled to the crankshaft by a link rod articulated to an eccentric mounted on the shaft of the crankshaft.

Abstract: A load machine for a combustion engine test bench includes at least one eddy-current brake associated with at least one electric drive. The brake includes a toothed ferromagnetic rotor secured to a shaft mounted so that it can rotate through a casing containing at least one induction coil borne by an internal peripheral region of the casing, so as to generate a magnetic field across which the rotor is intended to pass in order to generate eddy currents which brake the rotation of the shaft. The shaft is coupled to the combustion engine to be tested, and the electric drive is a variable-reluctance electric motor.

Abstract: A sparking plug for a combustion engine, includes a metal shell with an externally threaded end part for screwing into a tapped hole in a cylinder head. The shell supports, on the inside, an insulating body, through which there passes a central electrode capable of being connected to a high tension. An annular chamber is delimited by an interior surface in the region of the threaded end part of the shell and the exterior surface of the end of the insulating body. The sparking plug also has at least one pressure sensor, and is designed to subject this sensor to the pressure of an associated combustion chamber when the sparking plug is in place. The pressure sensor is installed in the threaded end part of the shell delimiting the annular chamber radially out from the internal surface of this end part such that the geometry of the annular chamber is not altered by the presence of the sensor.

Abstract: An eddy-current brake device includes at least one heat exchanger for dissipating the thermal energy that is due to the eddy currents during braking. The heat exchanger is designed to define a path for the cooling liquid, which path is predetermined in order to minimize the pressure drops and maximize the rate of flow of cooling liquid circulating through the exchanger, with a view to reducing the variations in working temperature of the heat exchanger. The device may include two symmetric heat exchangers, of which the inlets, the circuits and the outlets for water are arranged symmetrically, so as to compensate for the forces due to the currents of cooling liquid and so as thus to minimize the corresponding residual torque.

Abstract: The invention concerns a two-stroke engine comprising a cylinder (1) wherein moves a piston (2), exhaust (6) and intake (7) devices and a blower (9) for blowing in the cylinder (1) a scavenging air stream , wherein an additional volume (10) communicates with the cylinder (1) through closing and opening means (11, 12) whereof the movements are controlled synchdnously or out shift with those of the piston (2) in the cylinder (1) such that, during the combustion/expansion phase the burnt gases compress the air located in the additional volume (10) by penetrating therein at least partially, the air/burnt gas mixture is trapped therein under pressure; then the mixture is induced into the cylinder (1) during the intake phase.

Abstract: This laminated rotor for an eddy-current braking device includes a stack (1) of flat elements (2) parallel to each other, made of ferromagnetic material, the said stack being bounded in the direction perpendicular to the said flat elements (2) by two opposite surfaces (5), as well as at least one housing through the thickness of the said stack for accommodating a ferromagnetic component (8) made of ferromagnetic material which is solid or laminated in another direction than the said stack (1), able to establish a magnetic bridge extending between the said two opposite surfaces (5) and/or to hold the said flat elements assembled.

Abstract: A two-stroke or four-stroke internal combustion engine operates by admitting a carburated mixture or by admitting fresh air with the direct or indirect injection of fuel. The engine has at least one cylinder, which defines a variable-volume combustion chamber in which an engine piston, coupled by a connecting rod to the wrist pin of a crankshaft, executes a reciprocating movement. A compressor associated with each cylinder to supercharge the cylinder with carbureted mixture or with fresh air has at least one stage and, in the compression chamber, a compressor piston moves and is coupled to the crankshaft by a link rod articulated to an eccentric mounted on the shaft of the crankshaft.

Abstract: The invention relates to an internal combustion engine, the crankshaft (1) of which is equipped with a pulley or flywheel (4) secured to it by fastening means, in which said flywheel (4) is equipped with at least one pendular element (45), whose size, mass and position on said flywheel (4) are determined so as to be tuned to close to the angular frequency of the major harmonic of the cyclic disturbance.

Abstract: Two-stroke or four-stroke internal combustion engine (M1), operating by admitting a carburated mixture or by admitting fresh air with the direct or indirect injection of fuel, the engine having at least one cylinder (1) defining a variable-volume combustion chamber in which an engine piston (4) coupled by a connecting rod (7) to the wrist pin (8) of a crankshaft (9) executes a reciprocating movement, and a compressor associated with each cylinder in order to supercharge the cylinder with carburated mixture or with fresh air, characterized in that said compressor is a compressor with at least one stage, in the compression chamber (14a, 14b) of which there moves a compressor piston (212) which is coupled to the crankshaft by a link rod (111) articulated to an eccentric (10), said eccentric being mounted on the shaft of said crankshaft.

Abstract: The invention concerns an internal combustion engine devoid of mechanical turbo boost means comprising n cylinders (C1, . . .

Abstract: An eddy-current brake device, of the type comprising at least one heat exchanger for dissipating the thermal energy that is due to the eddy currents during braking, characterized in that each heat exchanger is designed to define a path for the cooling liquid, which path is predetermined in order to minimize the pressure drops and maximize the rate of flow of cooling liquid circulating through the exchanger, with a view to reducing the variations in working temperature of the heat exchanger, the device comprising two symmetric heat exchangers, of which the inlets (72, 73), the circuits and the outlets (75, 76) for water are arranged symmetrically, so as to compensate for the forces due to the currents of cooling liquid and so as thus to minimize the corresponding residual torque.