Etat Francais

The French State

S.n.c. Melchior Technologie

Other

Etat Francais Represente Par Le Delegue General Pour L'armament

The Franch State

Societe Pour Le Developpement De La Suralimentation Hyperbar

Thierry M Andre

Jean F Melchior

Henri B Edelmann

Alain Dourille

Michel De De Boisjean

Internal combustion engines with a cylindrical working chamber (1) in which there slides a piston (3), and which is closed by a cylinder head (4) with a device (5) for injecting atomized liquid fuel under high pressure and operating on the two-stroke cycle with a loop-scavenging system across the cylinder head, with two axisymmetric valves with coincident axes, one of these, an external, inlet valve (7) interacting with a seat (15) in the cylinder head and the other, an exhaust valve (6), exhibiting a tubular shape with a bearing surface applied against a seat (16) formed at the lower part of the inlet valve (7), the inlet valve opening towards the working chamber and the exhaust valve opening in the opposite direction, in order to delimit an exhaust passage (8) between them, the injection device (5) emerging in the working chamber substantially at the centre of a central hub (21) borne by the cylinder head and about which the exhaust valve (6) slides.

Internal combustion engines

Fuel injection device for an internal combustion engine, and engine equipped with such a device. The device includes a first cavity (3) forming part of a fuel pressurizing member (3, 4, 5), and a second cavity (12) made in an injector (9), in which cavity the pressure tends to lift a movable needle (11), against the action of the pressure in an accumulator (20), transmitted by a pipe (35). The first cavity (3) is separated from the second cavity (22) by a one-way valve (30).

Liquid fuel injection device for an internal combustion engine, and

Two-stroke internal combustion engines with a compression-ignition of

The two-stroke cycle engine employing intake and exhaust valves comprises a combustion and scavenging prechamber having substantially a shape of revolution about an axis and provided with an intake valve seat. Deflecting means or vanes are disposed inside the intake pipe as directly as possible on the upstream side of the seat so as to urge the mass of air into the combustion chamber in the manner of a whirl.

Reciprocating internal combustion engines of the two-stroke type

Auxiliary combustion chambers for supercharged internal combustion

In an engine (1), supercharged by a turbocompressor unit and provided with a bypass pipe (14), the exhaust gas manifold (13) of the engine has a small and constant section, the junction between the bypass pipe (14) and the gas inlet (11) of the turbine (5) is located upstream of the first junction (18) between the manifold (13) and pipes (12) connecting the work chambers (2) of the engine (1) to the manifold (13) and the bypass pipe (14) includes throttling means (15) which are such that the difference between the total pressures prevailing directly in the outlet (7) of the compressor (6) and upstream of the turbine (5) substantially only depend on the first of said pressures.

Supercharged internal combustion engines

An internal combustion engine (1), supercharged by a turbocompressor (3), comprises a bypass conduit (11) in which is placed an auxiliary combustion chamber (14). The primary zone (13) of this chamber (14) receives fuel whose flow is determined by regulating means (20). These means (20) vary this flow in the same direction as a parameter which is a characteristic of the load of the engine (1), in particular the temperature of the gases measured in the exhaust of the engine (1) by a sensor (22).

Supercharged internal combustion engines having a bypass conduit and an

An air-to-air radiator is inserted in the circuit of the supercharging compressor of an engine. A turbine which is driven by the exhaust gases of the engine drives the compressor. A regenerator, through which the gases issuing from the turbine pass, is placed in an air circuit connecting the compressor to the motor. The air circuit of the radiator is connected in parallel with the air circuit of the regenerator and a directional valve device is adapted to open one of these air circuits while closing the other and vice versa.

Supercharged internal combustion engines provided with a cooling system

The engine is supercharged by two turbocharger units which are capable of being put into operation in succession and their compressors are capable of supplying air to the engine in parallel. When the turbocharger unit is not in operation, the outlet of its compressor is put in communication through a bypass passage with the inlet of its turbine by means of flaps or the like.

Supercharged internal combustion engines, in particular diesel engines,

In a supercharged engine, a bypass connected to the compressor delivery pipe (4) supplies the turbine with all the air which has not been absorbed by the engine. The bypass (4) is divided into a first branch which supplies combustive air to the primary region (10) of an auxiliary combustion chamber and a second branch which supplies diluting air to the secondary region of the aforementioned chamber and comprises first throttle means. The first branch has second throttle means (13) comprising coupled orifices (14, 15) formed respectively on an inner sleeve (16) and an outer sleeve (17) movable relative to one another. According to the invention, a radial clearance (a) is maintained between the sleeves (16, 17) irrespective of their respective temperatures. Third throttle means (45), having a zero minimum flow section, are provided upstream or level with the second means (13).

Supercharged internal combustion engines, inter alia diesel engines

A supercharged engine is provided with a by-pass pipe through which all the air from the compressor which is not absorbed by the engine flows towards the turbine through an auxiliary combustion chamber. There is provided a system for supplying fuel to the combustion chamber, comprising means for regulating the flow rate of fuel supplied to the auxiliary chamber so as to prevent the supercharging pressure falling below a set value; in which power unit the regulating means comprise sensing means sensitive to the quantity of fuel injected per cycle into the engine so that each value of the said quantity of fuel is made to correspond to a particular set value of supercharging pressure.

Power unit

A diesel engine is supercharged by a compressor driven by a turbine which receives the exhaust gas of the engine. A bypass pipe permits the air delivered by the compressor and not taken by the engine to flow to the turbine. Means for impressing to the air flow in the by-pass a pressure drop which is substantially independent of the rate of flow and increases when the output pressure of the compressor increases comprises an air balanced throttle member in the by-pass and separate control means.

A power unit comprises a Diesel engine supercharged by a turbocompressor which has a turbine receiving the engine exhaust gases. A by-pass pipe conveys the air not absorbed by the engine from the compressor to the turbine with a pressure drop which is independent of the flow rate and increases with the compressor outlet pressure. An auxiliary combustion chamber upstream of the turbine receives the air which has travelled through the by-pass. A throttle is disposed in the path of the supercharging air to the engine and is automatically actuated so as to maintain the flow rate of air absorbed by the engine at a value below the flow rate supplied by the compressor under low load conditions.

Power units comprising a supercharged internal combustion engine

A power unit comprises an internal combustion compression ignited engine having variable-volume combustion chambers and supercharged by a turbocompressor having a turbine which receives the engine exhaust gases. A bypass pipe which is permanently open during operation of the engine returns the air not absorbed by the engine to the turbine with a pressure drop which, if appreciable, is independent of the flow rate and increases with the compressor outlet pressure. The power unit comprises a heat exchanger between the gas flow leaving the turbine and the air flow leaving the compressor. An air cooler is disposed in the path of the air travelling from the heat exchanger to the engine.

A power plant comprises an internal combustion engine, (Diesel engine), a compressor for supercharging the engine and a turbine for driving the compressor. The turbine is fed in parallel by the exhaust conduit of the engine and by a passage communicating with the compressor outlet. The passage is divided into two parallel arms. The first arm has a throttle. The second arm is connected to the primary zone of an auxiliary combustion chamber via orifices of a cross-section such that the pressure drop produced between the upstream and downstream ends of the orifices of the second arm is the same as the pressure drop produced between the upstream and downstream ends of the throttle of the first arm. The combustion chamber is fed by a fuel supply system entering the primary zone in the region of the turbulence produced in this zone by the arrival of air through the orifices, so that a complete and stable combustion is achieved in the auxiliary combustion chamber.

Growing community of inventors

Paris, France

Thierry M Andre