Abstract: The invention relates to an element comprising an input shaft (37), an output shaft (39), an electric motor (31) comprising a stator (61) and a rotor (63), a first clutch (33) connecting the input shaft (37) and the rotor (63), and a second clutch (35) connecting the rotor (63) and the output shaft (39), said clutches (33, 35) being hydraulic clutches. The transmission element (25) is provided with means for controlling the clutches (33, 35), said means comprising a control fluid circuit (302) and means for bringing (115, 116) at least one of said clutches (33, 35) back into the closed position. The invention also relates to a motor vehicle comprising one such transmission element.

Abstract: The invention relates to a method for controlling the operation of a cylinder for a multi-cylinder four-stroke internal combustion engine, wherein said cylinder interacts with at least one fuel injector, an intake valve, an exhaust valve, operation members for controlling the opening of the valves according to a cycle running and means driven by an engine control computer according to the predetermined operation conditions of the engine for selectively opening or closing said cylinder valves, wherein the deactivation of the valves is carried out simultaneously in the middle of a cycle at a time approximately coinciding with the middle of a time extending between the theoretical consecutive opening times of the intake (OI) and the exhaust (OE) valves.

Abstract: The invention concerns an internal combustion engine with at least one engine member, the engine member including a combustion chamber (4) of a combustible mixture with fuel components and oxidants, an ignition system of the combustible mixture by an igniter (7), sequential let-through devices for the fuel and oxidant components and for the combustion products, the engine being of the supercharging type by boost pressure of the oxidant components upstream of the engine member. According to the invention, the ignition system includes a closed head (6) (12a) substantially spherical enclosing the igniter in a precombustion chamber, the head including a set of orifices (5) intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber. In a variation of the invention, at least one of the let-through devices is a direct injector in the combustion chamber for, in all or in part, the fuel components and/or fuels.

Abstract: The invention concerns a method for estimating in real time, in a motor vehicle, a front force (FyV) and a rear force (FyR), these forces being applied by the ground to the front wheels and to the rear wheels, respectively, of the vehicle along a transverse direction. The method consists in: equipping this vehicle with a measuring device supplying a signal representative of a measured transverse acceleration (?T) and a signal representative of a measured yaw rate (?T), and with a processing unit; applying to these signals a processing operation to determine a front force and a rear force based on a dynamic model of the vehicle such as a model of the bicycle type. The invention applies to the field of active safety.

Abstract: The inventive system for evaluating the charged state of depollution means integrated into the exhaust line of a motor vehicle engine is characterised in that it comprises means (7) for determining a pressure in the depollution means, means (8) for determining the volume gas flowrate upstream said depollution means (10) and means for comparing the depollution means state defined by the thus determined pressure and the volume flowrate with a predetermined diagram (11) of the absent, overcharged and clogged states of the depollution means in order to evaluate the state thereof.

Abstract: The invention concerns an internal combustion engine with at least one engine member, the engine member including a combustion chamber (4) of a combustible mixture with fuel and oxidant components fitted with a compression system (9), an ignition system (7) of the combustible mixture by an igniter, sequential let-through devices for the fuel and oxidant components and for the combustion products. According to the invention, the ignition system includes a closed head (6)(12a) substantially spherical enclosing the igniter in a precombustion chamber, the head including a set of orifices (5) intended to communicate the combustion chamber and the precombustion chamber so that combustible mixture may flow into the precombustion chamber, and at least one of the let-through devices is a direct injector in the combustion chamber for the fuel and/or oxidant components, in all or in part. A method and an application are also described.

Abstract: This system for assisting the regeneration of depollution means associated with oxidation catalyst-forming means implementing an OSC function, constituting a supply of oxygen and integrated in an exhaust line of a motor vehicle diesel engine, in which the engine is associated with common rail means for feeding its cylinders with fuel, comprises means for analyzing the running conditions of the vehicle and for comparing them with predetermined threshold values, to control the engine in a first regeneration mode of operation with a lean mixture when running conditions are above the threshold values, or in a second regeneration operating mode implementing sequences in which engine operation alternates between stages of rich mixture operation and of lean mixture operation when conditions are below the threshold values.

Abstract: This system in which the depollution means (1) are associated with oxidation catalyst-formed means (2), and the engine (4) is associated with common rail means (7) for feeding it with fuel and adapted to implement a regeneration strategy using at least one post-injection of fuel into the cylinders, is characterized in that it includes means (8) for detecting a request for regeneration (req.RG), means (9) for detecting that the engine is in a stage of idling, means (11) for acquiring temperature downstream from the catalyst-forming means, means (8) for determining a maximum duration for post-injection application during the stage of idling on the basis of said temperature, and means (7, 8) for progressively reducing the post-injection as soon as the duration of use has reached the maximum duration.

Abstract: This system in which the depollution means (1) are associated with oxidation catalyst-forming means (2), and the engine (4) is associated with common rail means (7) for feeding it with fuel and adapted to implement the strategy Of regeneration using At least one postinjection of fuel into the cylinders, is characterized in that it comprises detector means (8) for detecting a regeneration request (req.RG), detector means (9) for detecting a state in which the vehicle accelerator pedal is being raised, means (11) for acquiring the temperature downstream from the catalyst-forming means, means (8) for determining, on the basis of this temperature, the maximum duration for applying postinjections during a stage, in which the engine is returning to idling as a result of the accelerator pedal being raised, and cutoff means (7,8) for immediately cutting off postinjection as soon as the duration of postinjection use has reached the maximum duration.

Abstract: The invention relates to a gasoline internal combustion engine with controlled ignition, comprising at least one cylinder (1), a cylinder head (2), scaling the cylinder (1), a piston (3), a combustion chamber (4), a gasoline injection means (5), an ignition means (6), for production of an ignition of the air/gasoline mixture in the combustion chamber, inlet (7) and exhaust (8) valves, selectively sealing the combustion chamber (4), an injection pump (8), for supplying the injector (5) with gasoline under pressure, wherein the pressure of the gasoline, provided to the injector (5), exceeds 250 bars and in at least in one operating range, the amount of gasoline delivered by the pump (8) to the injector (5) for one combustion cycle is divided into a number of partial and distinct injections with at least one partial injections delivered before ignition and at least one after.

Abstract: This system in which the NOx trap (1) is associated with catalyst-forming means (2) integrated in an exhaust line (3) of a vehicle engine (4), and in which the engine is associated with common manifold or “rail” fuel feeder means (7, 8) for feeding it with fuel and adapted, by modifying control parameters for the operation of the engine, to cause the engine to switch between lean mixture operation (9)and rich mixture (10), is characterized in that the fuel feeder means (7, 8) are adapted to define three strategies (11, 12, 13) for controlling lean mixture operation of the engine (9), and in that the fuel feeder means (7, 8) are adapted to cause the engine to switch between its various strategies in order to keep the trap (1) in a temperature window of maximum effectiveness.

Abstract: Process for the decontamination of the emissions from an internal combustion engine (1), the exhaust line (5) of which is equipped with a particle filter (7), characterized in that an NOx trap additive is added to the fuel, so that the said additive is found trapped within the soot, and in that, at the time of the regenerations of the particle filter (7), the engine (1) is controlled with a richness balance according to at least one alternation of a lean-mixture phase and of a rich-mixture phase, in order to bring about the adsorption of the NO2 from the exhaust gases by the said additive during the lean-mixture phase or phases and to bring about the oxidation of the soot particles by the adsorbed NO2 during the rich-mixture phase or phases. Device for the implementation of this process.

Abstract: A NOx trap is associated with oxidation catalyst-forming structure integrated in a common medium, and is located in an exhaust line of a motor vehicle diesel engine. The engine can be controlled at least with a rich mixture control strategy and with lean mixture control strategies of level 1 and level 2. The system acquires the temperatures upstream and downstream torn the trap, and on detecting a request to purge sulfate, it compares the temperatures with first and second curves for controlling operation of the engine with a rich mixture if the temperatures lie between said curve, and otherwise with a lean mixture. The system also compares the temperatures with third and fourth curves for controlling operation of the engine to apply the level 2 strategy if the temperatures lie between said curves, Or otherwise to apply the level 1 strategy.

Abstract: This system for assisting regeneration of a storage/release NOx trap integrated into an exhaust system (5) of a motor vehicle diesel engine (4) is characterized in that it includes means (11) for injecting fuel into the cylinders of the engine (4) in the form of pilot injections and main injections and means (12) for controlling the injection means (11) to switch the engine (4) periodically from a standard mode of operation using a lean mixture and pilot injection and main injection, in which NOx are stored in the trap (6), to a regeneration mode of operation using a rich mixture, with at least two pilot or main injections depending on the engine load, in which NOx, are released from the trap (6) and the trap is regenerated.

Abstract: The system for assisting the regeneration of depollution means (4) associated with oxidation catalyst-forming means (3) integrated in an exhaust line (2) of a motor vehicle diesel engine (1) in which the engine (1) is associated with common manifold means (5) for feeding fuel to its cylinders, the system being adapted implement, at constant torque, a strategy of regeneration by injecting fuel into the cylinders of the engine in at least one post-injection, is characterized in that it includes means (7, 8, 9) for detecting a stage in which the vehicle engine is idling or in which the accelerator pedal is being raised, and means (6) for analyzing the activity state of the catalyst-forming means (3) in order to control the common fuel-feed manifold means (5) in order to regulate the quantity of fuel injected during the or each post-injection as a function of the activity state of the catalyst-forming means (3).

Abstract: The invention concerns an ignition device for internal combustion engine, containing: a main chamber (1) designed for including a main combustible mixture, and fitted with a compression system of said mixture, and an igniter (11) containing a precombustion chamber (2) designed for receiving reactants and an ignition system (13,14) of the reactants contained in the precombustion chamber (2), said precombustion chamber (2) being defined by a precombustion chamber body (12) having a head (12a) including at least one passageway (15), said head (12a) of the precombustion chamber body separating the precombustion chamber (2) from the main chamber (1) and communicating the precombustion chamber (2) and the main chamber (1) by dint of the passageway(s) (15), characterised in that the head (12a) is coated at least partially externally with a coating layer (R) of at least one refractory material.

Abstract: The invention relates to a device for determining the mass of NOx stored in a NOx trap in an exhaust line of a motor vehicle engine, the device comprising means for acquiring the richness of the exhaust gases, the NOx flowrate on the upstream side of the trap, and the temperature of the trap. This device further comprises means for comparing the richness to a predetermined value, first means for determining, when the exhaust gases are lean, the increase in the mass of NOx stored as a function of the mass of NOx already stored, the temperature of the trap, and the NOx flowrate on the upstream side of the trap, and second means for determining, when the exhaust gases are rich, the reduction of the mass of NOx stored as a function of the temperature of the trap and the richness of the exhaust gases.

Abstract: The invention concerns a power transmission device between a heat engine (1) and the wheels (2) of a motor vehicle, said device comprising two independent electric machines (3, 4), at least two planetary gear trains (5, 15, 25, 35; 6, 16, 26, 36) connecting the heat engine and the electric machines with one another and to the vehicle wheels, a mechanical switching device (7) shifting the transmission device from one operating mode to another, each transmission mode corresponding to a different range of transmission ratios, the switching device enabling to connect one of the electric machines directly to the vehicle wheels and a control device monitoring the heat engine (1), the two electric machines (3,4) and the mechanical switching device (7), so that the operating points of the heat engine and of the electric machines correspond to the minimum instantaneous consumption and enable to provide the required power to the wheels.

Abstract: In this method, during the same operating cycle of the cylinder, the following phases are carried out: an opening phase at the exhaust (OE-OF); a first opening phase at the intake (OA1-FA1); a second opening phase at the intake (OA2-FA2); a fuel injection phase (OI-FI) and a combustion phase. The exhaust closing time (FE) is between the first intake opening time (OA1) and the second intake opening time (OA2). The invention also relates to an internal-combustion engine having a cylinder which operates in accordance with such a method, and a motor vehicle provided with such an engine.

Abstract: This system in which the depollution means (1) are associated with oxidation catalyst-forming means (2), and the engine (4) is associated with common manifold means (7) for feeding fuel and adapted to implement a regeneration strategy using at least one post-injection of fuel into the cylinders, is characterized in that it includes means (8) for detecting a regeneration request (req.RG)), means (9) for detecting when the engine is idling, means (11) for acquiring the temperature downstream from the catalyst-forming means, means (8) for determining, on the basis of said temperature, a maximum quantity of fuel to be injected when post-injections take place while the engine is idling on the basis of said temperature, and means (7, 8) for progressively reducing post-injection as soon as the quantity of fuel injected has reached the maximum quantity.