Institut Francais Du Pe'trole

Ifp Energies Nouvelles

Bruno Walter

Bertrand Gatellier

Thierry Colliou

Alain Ranini

Julian Kashdan

Dominique Soleri

Sylvain Mendez

Vincent Knop

Bertand Gatellier

Patricia Anselmi

A device for controlling the amount of fluid fed to the intake of a supercharged internal-combustion engine includes at least one turbocharger with a compression stage including at least one compressor with an intake for the fluid to be compressed, an expansion stage with at least one turbine having at least one exhaust gas inlet and expanded exhaust gas outlet, a transfer line for carrying the compressed fluid from the compressor outlet to the at least one turbine inlet with throttling means for controlling the compressed fluid transfer to the turbine, and an exhaust gas recirculation line between exhaust gas outlet of turbine and intake of compressor.

Device for controlling the amount of fluid fed to the intake of a supercharged internal-combustion engine equipped with an exhaust gas recirculation circuit and method using same

The present invention relates to a device for controlling the amount of air fed to the intake of a turbocharged internal-combustion engine comprising a turbocharging system including a turbocharger () with a turbine () connected to at least one exhaust gas outlet of said engine, as well as an outside air compressor (), a line () for partial transfer of the compressed air from the compressor to the turbine inlet, and an EGR line () between an exhaust gas outlet and a compressed air intake line (). The device is characterized in that the partial transfer line and the EGR line share at least one common portion ().

Device and method for controlling the injection of air and exhaust gas at the intake of a supercharged internal-combustion engine

The present invention relates to a device for controlling the amount of air fed into the intake of a charged internal combustion engine comprising two exhaust gas outlets () which are each connected to an exhaust manifold () of a group of at least one cylinder (). The device comprises a charging device () comprising a turbocompressor having a dual-inlet () turbine () connected to the exhaust gas outlets and an external air compressor (), and at least one duct for partially transferring compressed air from the compressor to the turbine inlets. According to the invention, the partial transfer duct () is integrated into the cylinder head and comprises throttles () controlling the circulation of compressed air in said duct.

Device built into a cylinder head for controlling amount of air fed into the intake of a turbocharged internal combustion engine and method using such a device

The present invention relates to a device for controlling the amount of air fed to the intake of a supercharged internal-combustion engine, said engine comprising two exhaust gas outlets () connected each to an exhaust manifold () of a group of at least one cylinder (), said device comprising a supercharging device () including a turbocharger with a dual-inlet () turbine () connected to said exhaust gas outlets, as well as an outside air compressor (), and at least one duct for partial transfer of the compressed air from the compressor to the two turbine inlets. According to the invention, the partial transfer duct opens into the cylinder head at the exhaust valves and it comprises throttling means () controlling the compressed air circulation in this duct.

Device for controlling a quantity of air fed into the intake of a supercharged internal combustion engine and cooling the exhaust&#x2014;method using such a device

The present invention is a device for controlling an amount of air fed into the intake of a supercharged internal combustion engine with the engine comprising two exhaust gas outlets (and) each linked to an exhaust manifold (and) in at least one cylinder (, 12, 12, 12). A supercharging device () comprising a turbo-compressor with a double-intake (and) turbine () is connected to the exhaust gas outlets and to an outside air compressor () and to a partial transfer duct of the compressed air from the compressor towards the intakes of the turbine. The partial transfer duct comprises two branches (and) which are connected to intakes of the turbine each having a shut-off (and) which controls circulation of compressed air in the branches. The partial transfer duct is integrated into the casing of the turbo-compressor so that a manner as a length between the outlet of the compressor and the double intakes of the turbine is as short as possible to achieve a limited size and optimized response time.

Device for controlling the amount of air fed into the intake of a supercharged internal combustion engine and method using such a device

The present invention relates to a method for reintroducing exhaust gas to the intake of an internal-combustion engine wherein, during the engine exhaust phase, part of the exhaust qas contained in combustion chamber () of cylinder () of the engine is fed, for an operating range of this engine, into a first fluid circulation circuit (C) and the other part of said gas is discharged into an exhaust circuit. According to the invention, the method consists: during the engine intake phase, in cooling the exhaust qas fed into fluid circulation circuit (C), in mixing the cooled recirculated exhaust qas with fresh supply air (AF) coming from engine supply circuit (), in feeding the mixture of recirculated exhaust gas and of supply air into a second fluid circulation circuit (C), and in cooling said mixture fed into second circuit (C) prior to feeding it into combustion chamber ().

Method for reintroducing exhaust gas to the intake of an internal-combustion engine and engine using same

The present invention relates to a method of improving vaporization of a fuel injecting an engine that can work at least a conventional mode during a high load and an at least partly homogeneous mode with an intake, compression, combustion and exhaust phase during the high load, said engine comprising at least one cylinder, a combustion chamber, at least one intake valve associated with an intake pipe, at least one exhaust valve with an exhaust pipe, control means for controlling opening-closing of the at least one valve and fuel injection means.

Method for improving vaporization of a fuel for an internal combustion engine notably of direct injection type, in particular an autoignition engine, and more particularly of diesel type

A circuit for feeding at least one fluid to an internal-combustion engine, notably of Diesel type, includes a circuit () for supercharging air to the engine intake, including a supercharging pipe (), a supercharging device () with a compression stage () and a compressed air cooling radiator (), as well as a circuit () for recirculating the exhaust gas to the engine intake, including an exhaust gas recirculation pipe () and an exhaust gas cooler (). The feed circuit includes a connecting pipe () allowing to connect, upstream from cooler (), air supercharging circuit () and exhaust gas recirculation circuit ().

Feed circuit for supplying a supercharged engine with at least one fluid and method for supplying such an engine with at least one fluid

The invention concerns an internal combustion engine, in particular with direct injection comprising at least one cylinder (), one piston () sliding in said cylinder, a combustion chamber () delimited on one side by the upper side of the piston including a concave trough () wherein is arranged a dog point () with apex angle (a) and a fuel injector () for injecting fuel at a spray angle (a) not greater than 2 Arctg CD/2f where CD is the diameter of the cylinder () and F the distance between the point of origin of the fuel jets derived from the injector and the position of the piston () corresponding to a crankshaft angle of 50&#xb0; relative to the upper dead center. The invention is characterized in that the apex angle (a) of the dog point is greater than the spray angle (a) by an angle ranging between 30&#xb0; and 60&#xb0;.

Internal-combustion engine, notably of direct injection type, with a piston provided with a bowl comprising a teat

A method facilitates vaporization of a fuel in a direct-injection four-stroke engine including at least one cylinder with a combustion chamber, at least one fluid intake with an intake pipe and a valve, at least one burnt gas exhaust with an exhaust pipe and a valve, a valve controller and fuel injector. The method includes, in the vicinity of the intake phase start, in opening the intake valve so as to allow the intake fluid into the combustion chamber, in opening exhaust valve so as to feed again into this chamber at least part of the burnt gas contained in exhaust pipe; prior to the end of the intake phase, in closing the exhaust valve; in the vicinity of the intake phase end, in closing the intake valve; and during this intake phase, in carrying out at least one fuel injection into the combustion chamber.

Method for facilitating vaporization of a fuel for a diesel type direct-injection internal-combustion engine

The present invention relates to a method of injecting fuel into the combustion chamber () of a cylinder of a direct-injection four-stroke internal-combustion engine, notably of diesel type, that can run according to a homogeneous combustion mode and according to a conventional combustion mode. According to the invention, this method consists, for the conventional combustion mode of the engine, in feeding into this chamber a first amount of fuel in the vicinity of the top dead centre of the piston at the beginning of the intake phase and another quantity of fuel in the vicinity of the top dead centre of this piston at the end of the compression phase.

Fuel injection method for internal-combustion engine, notably of direct injection type, comprising a piston provided with a bowl and a teat

Fuel injection method for high injection sensitivity internal-combustion engine and engine using such a method

The present invention relates to a method of controlling the combustion by autoignition of a homogeneous fuel mixture for an internal-combustion engine comprising a combustion chamber in which a stage of slow oxidation of said mixture occurs prior to the combustion of this mixture. A determined amount of fuel is fed into the combustion chamber during the slow oxidation of the mixture so as to lengthen this oxidation stage.

Combustion control method and device for an internal-combustion engine

Method and engine providing mixing of at least one gaseous fluid such as air and of a fuel in the combustion chamber of a direct-injection internal-combustion engine

Growing community of inventors

Colombes, France

Bruno Walter