Societe D'etudes De Machines Thermiques-s.e.m.t.

Societe D'etudes De Machines Thermiques

S.e.m.t. Peilstick

Societe D'etudes De Thermiques S.e.m.t.

Dirk Bastenhof

Alain Devaux

Roger Brisson

Claude Bonniot

The present invention relates to a device for feeding liquid fuel to a diesel-type I.C. engine, said device comprising a pipe feeding fuel to the injection pumps of said engine, said feed pipe forming a feed loop and comprising a pipe for admission of said fuel, means for treating and circulating said fuel and a pipe for introducing additional liquid into said fuel, characterized in that the point of connection of said pipe for introducing additional liquid to said fuel feed pipe is located immediately upstream of that part of said feed pipe which supplies said injection pumps of said engine, and in that a closure valve, capable of closing said feed pipe, is located immediately downstream of said part of the feed pipe which supplies said injection pumps of said engine.

Device for feeding liquid fuel to a diesel-type I.C. engine

A constant-stroke, variable by-pass, plunger-type, jerk pump for injecting fuel-oil into a working cylinder of an internal combustion engine, wherein the plunger comprises a passage-way opening at one end thereof into the working chamber of said plunger and adapted to communicate at its other end with at least one duct connected to the fuel supply and opening into the pump cylinder housing said plunger to temporarily cut off the fuel discharged from said chamber to the fuel injector during the upward stroke of the plunger towards its top dead center, the first fuel discharge phase enabling the fuel to be pre-injected into the engine cylinder whereas the second fuel discharge phase provides for the main injection of fuel thereinto.

Fuel-injection pump for internal combustion engine

A method of improving the effectiveness of braking a reversible four-stroke V type Diesel engine with an even number of at least ten working cylinders fitted with individual starting valves sequentially fed from an engine-driven rotary pressure air distributor, the method consisting in reducing the duration of pressure air inlet to the distributor for one bank of cylinders with respect to the other bank and optimizing such a shortened duration for each starting valve of one bank of cylinders during the braking step and possibly optimizing that for each starting valve of the other bank of cylinders for the restarting step.

Method of quick pneumatic braking of a diesel engine

A method and a device for stopping a fuel-injection internal combustion engine, in which the injection pump is of the multi-cylinder single-housing type, comprising in supplying the housing of the pump with pressurized gas for separating the pump plungers and tappets from their actuating cams.

Method and device for stopping a fuel-injection internal combustion

In a device for injecting liquid fuel in a combustion chamber of an internal combustion engine, a pressure accumulator chamber connected through a narrow passage with an injection conduit between an injection pump and an injector and intended to suppress or reduce the pressure oscillations appearing in the injection conduit at the end of an injection stage.

Device for damping pressure waves in an internal combustion engine fuel

A device for injecting water into one cylinder of an internal combustion engine, in order to reduce the temperature of said cylinder and thus to avoid the nitrogen compounds (NOx) in the exhaust gases; said device comprising a pump connected to an injector which opens into said cylinder and an actuating mechanism for said pump coupled to a selected point of the intake control position of the engine valve actuating system.

Device for injecting water into the cylinders of an internal combustion

The invention relates to a method and a device for obviating the risk of injection fuel leakage into the cooling system of Diesel engine injectors in the region of the glazed mating surfaces of the injector nozzle body and nozzle holder traversed by a fuel intake passage and by at least one liquid coolant inlet passage and one liquid coolant return passage, wherein is provided, at the plane defined by said glazed surfaces, leakage-fuel recovery passages drilled between the said fuel intake passage and the said cooling passages and having no communication therewith.

Method and device for obviating the risk of injection fuel leakage, more

A means of damping cyclic fuel injection pressure drop in a constant-stroke, variable delivery flow rate injection jerk-pump for an internal combustion engine, consisting in slowing down fuel pressure drop at the end of every injection cycle by increasing the added pressure head losses of fuel backflow by a reduction of the free passageway cross-sections through which the fuel flows successively on its return path from the pump working chamber to the spill port.

Fuel injection pump with cavitation preventing steps along the fuel

A method and a device for pneumatically braking and re-starting in the reverse direction a Diesel engine, comprising stopping the fuel supply to the engine, locking starting valves of the engine in an open position during the braking period, and then opening a main starting valve and the exhaust ports of the starting valves when the engine has slowed down to a rotary speed of a predetermined value.

Pneumatic method and device for diesel engine braking and restarting in

An erosion-preventing device in a jerk-pump of the kind comprising a cylindrical plunger reciprocating longitudinally within a bore formed in a barrel mounted in the pump housing and including a common feed and by-pass duct opening into said bore, said erosion preventing device being constituted by a wall portion, inserted longitudinally into said common duct and consisting of a partition having the shape of a flat plate or strip and inserted into said common duct.

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Eaubonne, France

Dirk Bastenhof