SU1368936A1 - Spark plug for i.c.engine - Google Patents

Abstract

The invention improves ignition efficiency. Between the inner surface 7 of the housing I and the insulator 4 there is an annular cavity 8 in which a ring 9 of metal hydride powder is placed. On the inner surface 10 of the latter is placed a layer I1 of porous cermet. Layer II is placed between surface 10 and the spark gap 6. Case 1 is heated during engine operation. When a certain temperature is reached, the powder of the flask 9 releases hydrogen coming from cavity 8 through layer 11 to gap 6. At the same time, hydrogen becomes atomic, and the plasma jet has a catchy igniting ability to effectively ignite depleted fuel mixtures. During cold start of the engine, the presence of the electric heating element 12 in the cavity 8 is provided. 1 3. P . f ly, 1 ill. c & (L

Description

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The invention relates to an engine structure, in particular to spark plugs for internal combustion engines.

The purpose of the invention is to increase the efficiency of a candle by improving the operation of a candle on lean fuel mixtures.

The drawing shows the proposed candle.

The candle includes a housing 1 with a side electrode 2 of the ring type. A ceramic insulator 4 with a central electrode 5 is fixed in the central opening 3 of the housing 1. Between the electrodes 2 and 5 there is a spark gap 6. Between the inner surface 7 of the housing 1 and insulator A there is an annular cavity 8 in which a ring 9 of metal hydride is placed for example La Ni.gil. , on the inner surface 10 of which a layer 11 of porous cermet is placed,

on the basis of, MgO, TiO, etc. Layer 11 is placed between the inner top 10 of the ring 9 and the spark gap 6.

Layer 11 can be made of AljO5 corundum obtained by heat treatment of A1 (OH) and formed by electroerosive dispersion of aluminum in water. The pore size in the layer of porous cermet is 0.01-0.1 µm, the porosity is 20%. Inside the ring 9 is placed an electric heater element 2.

The candle works as follows

During engine operation, the spark plug body is heated. When a certain temperature is reached, the powder of ring 9 begins to release hydrogen coming from cavity 8 through porous metal-ceramic layer 11 to spark gap 6. At the same time, the passage through surface electrical discharges at the boundary of porous ceramics and span 6, hydrogen becomes atmarny, with increased activity. At the same time, a plasma jet containing active hydrogen possesses a higher igniting ability, which allows it to be efficiently controlled. Order 310/54

burning lean fuel mixtures and reducing the power consumption for plasma generation, and the metal-ceramic layer is a refractory collector of atomic hydrogen, activating the surface discharge in the spark gap of the candle.

Also, cold start

engine provided for

electric heating element 12 in the cavity 8 with metal hydride powder. When enabled, the electric heating element 12 occurs

preheating the powder to the temperature at which hydrogen starts to form (in the cold state of the jacket, no hydrogen is evolved). When a voltage is applied to a candle, the latter forms a plasma of increased activity in the completion of atomic hydrogen. The spark plug allows efficiently, without gaps, to produce BURNER of combustible mixtures, to work on

low-energy mixtures, reduce the cost of electricity for feeding the spark plug, ensure a more complete combustion of the mixture, reduce exhaust emissions and speed up the cold start of the internal combustion engine.

Claims (2)

1. Spark plug for morning combustion engine B1, containing core A trigger with a side electrode and a ceramic insulator with a central electrode fixed in the central opening of the body, with a central electrode, between the electrodes, a spark gap is provided, and between the inner surface of the body and the outer surface of the insulator an annular cavity is distinguished; efficiency, It is equipped with a ring of metal hydride powder placed in the annular cavity and a layer of porous metal ceramics located between the inner surface of the ring of metal hydride powder and the spark gap. 2. Candle in accordance with claim 1, which means that it is additionally equipped with an electric heating element placed inside the ring of metal hydride powder. Circulation 632 Subscription