Abstract: A system for pressurizing a cooling circuit of an internal combustion engine equipped with a turbocompressor unit. The turbocompressor has a turbine arranged on an exhaust line of the exhaust gas of the internal combustion engine and a compressor arranged on the intake line internal combustion engine. The internal combustion engine comprises a cooling circuit comprising an expansion tank connected, by a pneumatic pipe, to a point of the intake line downstream of the compressor. The pneumatic pipe comprises a mechanical valve, adapted to open and to close said pneumatic pipe in relation to a differential pressure between a point upstream and a point downstream of the mechanical valve itself.

Abstract: The present invention relates to a seal unit (10) suitable to be inserted in the first groove (20?) of a piston (20) of an internal combustion engine. The seal unit (10) according to the invention comprises a first ring-shaped body (10?) which defines a first gap section (12?) and a second ring-shaped body (10?) which defines a second gap section (12?). According to the invention such bodies are overlapping so that the position of said first section (12?) is different from the position of said second section (12?) in relation to a reference axis (101) to which the two bodies (10?,10?) are coaxial.

Abstract: A turbocompound internal combustion engine having a turbocharger with a variable-geometry turbine; and an auxiliary turbine, which is located downstream from the turbine of the turbocharger, provides for recovering energy from the exhaust gas, and is connected mechanically to the drive shaft of the engine via a transmission; a control device compares the rotation speed of the auxiliary turbine, detected by means of a sensor, with a range of permissible speeds calculated on the basis of the speed of the drive shaft, and controls fuel supply to the engine and the geometry of the variable-geometry turbine to maintain the speed of the auxiliary turbine within predetermined limits in the event of a fault on the transmission.

Abstract: A turbocompound internal combustion engine having a turbocharger with a variable-geometry turbine; and an auxiliary turbine, which is located downstream from the turbine of the turbocharger, provides for recovering energy from the exhaust gas, and is connected mechanically to the drive shaft of the engine via a transmission; a control device compares the rotation speed of the auxiliary turbine, detected by means of a sensor, with a range of permissible speeds calculated on the basis of the speed of the drive shaft, and controls fuel supply to the engine and the geometry of the variable-geometry turbine to maintain the speed of the auxiliary turbine within predetermined limits in the event of a fault on the transmission.

Abstract: An assembly for providing an engine brake system for an internal combustion engine, in particular of an industrial vehicle, which engine comprises a plurality of cylinders, a cylinder head provided, for each such cylinder, with at least one exhaust valve and, for each such exhaust valve, with a relative control cam having a profile comprising at least one section that can be selectively actuated by varying the valve play, the assembly comprising, for each cylinder, a support body adapted to be connected to the cylinder head and bearing at least one rocker arm support spindle, the rocker arm support spindle being coupled, by means of an eccentric bushing, to a rocker arm adapted to be interposed between an exhaust valve and a cam in order to oscillate about an axis, the assembly lastly comprising an actuator adapted to rotate the eccentric bushing with respect to the support body in order to displace the axis of oscillation of the rocker arms and to vary the valve play between these rocker arms and the exhaust

Abstract: A purifier device for a bleed circuit of a block of an internal combustion engine provided with a filter member acting by coalescence adapted to be traversed by a flow of gases from the interior of the block and containing oil and particulates in suspension; the filter member has an absolute retaining power such as to allow the passage of the particulates so that they are incorporated on the particles of oil agglomerated by coalescence within the filter member and are removed with this oil without the risk of the filter member becoming clogged up.

Abstract: An endothermal engine provided with a device for purifying the blow-by gases of the block, comprising a housing provided with an inlet opening communicating with the interior of the block of the engine and an outlet opening for the purified gases and integrally defining an impact separator for the removal of the larger oil particles and a filter member for the separation of the residual oil and particulates housed in a chamber of the housing; the device forms a compact integrated unit which may be readily mounted on the engine.

Abstract: Electronic control system for a variable geometry turbocompressor applied to a diesel engine provided with a continuous braking device. The system is provided with a selector which may be manually actuated and by of which it is possible to control the engagement/disengagement of the continuous braking device and it is possible to select a first braking mode according to which the speed of the engine is maintained substantially constant by controlling the turbocompressor and a second braking method in which the continuous braking device provides the maximum braking power.

Abstract: An electronic control system for a variable geometry turbocompressor applied to a diesel engine, in which a first circuit produces, in response to input signals, a first closed-loop piloting signal supplied to an actuator which modifies the geometrical characteristics of the turbocompressor. The system further comprises a second circuit which receives as input a measurement signal proportional to the speed of rotation of the turbocompressor and generates a second piloting signal which is supplied to the actuator when the measurement signal exceeds a stored limit value.