Internal combustion engine control method for diesel type motor vehicle, involves reducing section of air passage in inlet circuit, when regeneration phase of filtering unit and slowdown functioning state of engine is detected

The method involves reducing a section of air passage in an inlet circuit (7) in downstream of a closing unit (72) when regeneration phase of a filtering unit (62) and a slowdown functioning state of an engine is detected. A multiple injection of fuel is made in each cylinder (5) at each combustion cycle of the motor, where the multiple injection has a main injection to form a fueled mixture ready to be ignited and auxiliary injections to form a homogeneous premixture of fuel injected with air admitted in the cylinder.

Device for reducing emission of nitrogen oxide produced by diesel engine of vehicle, has orientation unit directing fluid towards main or secondary circuit, where secondary circuit has fuel injector to inject fluid in combustion chamber

The device has a tank (20) containing fluid i.e. aqueous solution of urea, and connected with an exhaust pipe (16) by a main circuit (30). The circuit has an injector (32) for injecting the fluid inside the pipe. A centrifugal pump (60) is connected to the tank to assure circulation of the fluid from the tank. An orientation unit (40) i.e. three-way valve, directs the fluid contained in the tank towards the circuit or a secondary circuit (50). The secondary circuit connects the tank and a combustion chamber (12), and has a fuel injector (52) that injects fluid i.e. fuel, inside the chamber. An independent claim is also included for a method for utilizing a nitrogen oxide emission reducing device.

Motor vehicle internal combustion engine has inlet for additional fresh gas into combustion chamber to scavenge combustion gases

The engine consists of at least one cylinder (2) and cylinder head forming a combustion chamber containing a piston reciprocating between top and bottom positions, and cylinder head inlet (3) and exhaust (4) ports. It has an auxiliary circuit (8) with a compressor (9) to deliver additional fresh gas through a port (12) in each cylinder when its exhaust port is opened to scavenge the combustion gases. In a variant of the design the auxiliary circuit can have main and additional turbines on one drive shaft.

INTERNAL COMBUSTION ENGINE EXHAUST LINE WITH MEANS FOR REDUCING NITROGEN OXIDES

L'invention concerne une ligne d'échappement (30) d'un moteur à combustion interne (10) comprenant un conduit (31, 32) de circulation de gaz brûlés sur le trajet duquel sont prévus des moyens d'injection (35) d'un agent réducteur, des moyens générateurs de tourbillons (50) et un catalyseur SCR (33).Selon l'invention, lesdits moyens générateurs de tourbillons comportent un boîtier dans lequel débouchent lesdits moyens d'injection, qui présente une sortie axiale raccordée du côté du catalyseur SCR et une entrée latérale raccordée audit conduit selon un axe décalé par rapport à l'axe de la sortie axiale, pour permettre une entrée tangentielle des gaz brûlés dans le boîtier. The invention relates to an exhaust line (30) of an internal combustion engine (10) comprising a duct (31, 32) for flue gas circulation in the path of which injection means (35) are provided. A reducing agent, vortex generating means (50) and an SCR catalyst (33). According to the invention, said vortex generating means comprise a casing into which said injection means open out, which has a connected axial outlet. side of the catalyst SCR and a lateral inlet connected to said conduit along an axis offset from the axis of the axial outlet, to allow tangential entry of the burnt gases into the housing.

METHOD FOR MONITORING A TEMPORARY ASSISTANCE SYSTEM IN TORQUE OF A THERMAL ENGINE

L'invention concerne un procédé de surveillance d'un système d'assistance temporaire en couple par une machine électrique, d'un moteur thermique d'un véhicule, comportant les étapes de : - caractérisation de l'usure engendrée par le système d'assistance temporaire en couple, en fonction d'un ou plusieurs cumuls de temps d'utilisation du système d'assistance temporaire en couple, - inhibition du système d'assistance temporaire en couple dès qu'au moins un des cumuls est supérieur à un seuil d'usure correspondant. The invention relates to a method for monitoring a system for temporary torque assistance by an electric machine, a heat engine of a vehicle, comprising the steps of: characterizing the wear generated by the system; temporary assistance in couple, depending on one or more times of use of the temporary assistance system in torque, - inhibition of the temporary assistance system in couple as soon as at least one of the accumulations is greater than a threshold corresponding wear.

Air intake system for combustion chamber of e.g. petrol engine, has injector of indirect injection type, and synchronizing unit to synchronize opening of scavenging and intake valves with respect to opening of exhaust valve

The system has an intake pipe (CA) supplied with induced air and cooperating with an exhaust pipe closed by an exhaust valve. The intake pipe has a fuel and air mixture intake pipe comprising an injector (IN) of indirect injection type in the upstream of an intake valve and a scavenging pipe (CB) closed by a scavenging valve. A synchronizing unit synchronizes the opening of the scavenging and intake valves with respect to the opening of the exhaust valve.

OPTIMIZED EXHAUST GAS RECIRCULATION METHOD FOR THERMAL MOTOR, AND ENGINE EMPLOYING SAID METHOD

METHOD FOR MANAGING A DEVICE FOR AFTER-TREATMENT OF THE EXHAUST GASES OF AN ENGINE, INCLUDING A LOW FREQUENCY MODE AND A HIGH FREQUENCY MODE OF ALTERNATION OF THE STORAGE AND PURGE PHASES.

L'invention concerne un procédé de gestion du fonctionnement d'un dispositif de post-traitement des gaz d'échappement d'un moteur à combustion interne dans un véhicule automobile. Ledit dispositif subit alternativement, selon un premier mode de fonctionnement, une phase (2) de stockage et une phase (3) de purge, à une basse fréquence.Selon l'invention, ce procédé est essentiellement caractérisé en ce que, selon un deuxième mode de fonctionnement, le dispositif de post-traitement subit alternativement la phase (4) de stockage et la phase (5) de purge, à une haute fréquence, ledit deuxième mode de fonctionnement remplaçant le premier mode de fonctionnement lorsque la pression moyenne effective du moteur est au moins de l'ordre de 10<6> pascal et/ou que la vitesse du véhicule est au moins de l'ordre de 120 kilomètres par heure. The invention relates to a method for managing the operation of a device for aftertreatment of the exhaust gases of an internal combustion engine in a motor vehicle. Said device undergoes alternately, according to a first operating mode, a storage phase (2) and a purging phase (3), at a low frequency. According to the invention, this method is essentially characterized in that, according to a second operating mode, the post-treatment device undergoes the storage phase (4) and the purging phase (5) alternately, at a high frequency, said second operating mode replacing the first operating mode when the effective mean pressure of the engine is at least of the order of 10 <6> pascal and / or that the speed of the vehicle is at least of the order of 120 kilometers per hour.

DEVICE FOR REDUCING EMISSIONS OF NITROGEN OXIDES CONTAINED IN EXHAUST GASES OF INTERNAL COMBUSTION ENGINES

EXPLOSION ENGINE PART COMPRISING A TURBINE

Internal combustion engine e.g. turbocharged spark ignition internal combustion engine, has blow line opening directly or indirectly in cylinders, upstream of their connection with exhaust line to inject compressed delivery air in cylinders

The engine has a fresh air intake line (20) and a burnt gas exhaust line (30) which opens in cylinders (12) of a combustion chamber (11). A delivery air blow line (22) includes an auxiliary compressor (23) and an electric motor (24), and an electromagnetic control valve (27) which regulates the rate of the delivery air. The blow line opens directly or indirectly in the cylinders, upstream the connection of the cylinders with the exhaust line for injecting compressed delivery air in the cylinders.

Internal combustion engine e.g. direct injection internal combustion engine for motor vehicle, has heat exchanger unit placed between exhaust circuit and intake circuit which has distributor with intake branches

The engine has a heat exchanger unit placed between exhaust circuit (20) and intake circuit (10). The heat exchanger has a branch circuit (40) that includes a chamber connected to an upstream channel and down stream channel in the fluid flow direction. The intake circuit has an air conduit (11) and intake air distributor (13) which is provided with the intake branches. The exhaust circuit has exhaust branches connected to an end of a cylinder.

Depollution unit e.g. air-filter, regeneration controlling method for motor vehicle, involves transmitting predetermined set point to power-assisted clutch unit in which set point represents request of declutching of clutch unit

The method involves detecting a signal representing a request of a regeneration of a depollution unit (8) by a logic controller (3) i.e. engine control unit, and transmitting a predetermined set point representing a trigger of the regeneration to a supply unit. Another signal representing a predetermined state of an accelerator unit (5) is received, where the two signals are electrical and/or fluid in nature. Another predetermined set point is transmitted to a power-assisted clutch unit (7) in which the set point represents a request of declutching of the clutch unit. An independent claim is also included for a device for controlling a regeneration of a depollution unit.

INJECTION INTERNAL COMBUSTION ENGINE HAVING HEAT EXCHANGE MEANS BETWEEN AN INTAKE CIRCUIT AND AN EXHAUST CIRCUIT

Recirculated gas and water injection device for intake circuit of internal combustion engine, has water duct extending into recirculated gas duct, and water distributor part with tapered-shaped end located inside recirculated gas duct

The device has a water injection system (9) with a water distributor part and water ducts, where each water duct extends into a recirculated gas duct (11). A tapered-shaped end of the water distributor part is located inside a recirculated gas intake (10). The recirculated gas intake and the recirculated gas duct are defined in a cylindrical head (3) of an internal combustion engine (1), where the recirculated gas duct emerges from an intake manifold formed in the cylindrical head.

METHOD AND SYSTEM FOR DIAGNOSING THE COMPOSITION OF A RESERVOIR TO CONTROL INJECTION ON CATALYST OF REDUCTION OF OXIDES OF NITROGEN

METHOD FOR MANAGING AN EXHAUST GAS POST-TREATMENT DEVICE INCLUDING A LOW FREQUENCY MODE AND A HIGH FREQUENCY MODE FOR ALTERING STORAGE AND PURGE PHASES

METHOD FOR DIAGNOSING THE STATUS OF A CATALYTIC ELEMENT BY IMPLEMENTING A DOUBLE INJECTION

Exhaust line for internal combustion engine provided with means for reducing nitrogen oxides

The invention relates to an exhaust line (30) for an internal combustion engine (10) that comprises a duct (31, 32) for circulating the burnt gases and on the path of which are provided means for injecting (35) a reducing agent, eddy generating means (50) and a SCR catalyst (33). According to the invention, the eddy generating means include a housing in which said injection means gives, and having an axial outlet connected on the SCR catalyst side and a side inlet connected to said duct along an axis that is offset relative to the axis of the axial outlet in order to provide a tangential inlet of the burnt gases into the housing.

FUEL INJECTION CONTROL FOR A SUPERIOR ENGINE

Supercharged external injection internal combustion engine controlling method, involves increasing fuel injection pressure at engine`s high load and low speed state relative to stable functioning state of engine at heat and partial load

The method involves increasing fuel injection pressure in intake conduits at a low speed and high load state of an internal combustion engine, with respect to a stable functioning state of the engine at heat and partial load. A fuel injection duration at a partial load and cold functioning state of the engine, is reduced with respect to the low speed and high load state of the engine.

Variable exhaust gas distribution system for supercharged internal combustion engine of motor vehicle, has control units controlling valves and manifolds with pipes connected to inlets of turbines, where dimension of one manifold is reduced

The system has control units controlling sets of small and large sectioned exhaust valves (4, 5) by corresponding cylinders (1) of an internal combustion engine (M) i.e. supercharged internal combustion engine, of a motor vehicle, in an independent manner. Exhaust manifolds (51, 52) are connected to the respective valves and have exhaust gas supply pipes (61, 62) which are connected to inlets of turbines (11, 21) of turbochargers (10, 20) of the engine, where dimension of the manifold (51) is reduced. The turbines are connected in upstream of a catalyst (9).