DE351301C - Device for injecting pure fuel into internal combustion engines - Google Patents

Description

Device for injecting pure fuel into internal combustion engines. The invention relates to a device for injecting pure fuel into Combustion machines, in which (read single or multiple needle valve carries a control piston influenced by fuel pressure. The essence of the invention lies in (let an overflow line with a non-return valve for the return line of leak fuel from your space behind the control piston into the working chamber the needle valve side of the piston is provided. This return line is advantageous placed in the atomizer itself.

The drawing shows two application examples.

Fig. I is a section of one embodiment.

Fig. A shows in section the application of the inventive concept to one water-cooled atomizer that is used for easily atomizing starter fuel and is determined by heavy or less easily combustible a working fuel.

As Fig. I shows, the atomizer housing contains the fuel valve a with control piston d for the 01, which acts as usual on the annular surface c of the piston d. A leakage line e connects the free passage spaces f on the rear side of the piston d with the irl :; itsl: ainnier g, and. A return ball valve 1i is switched on in this line. (read by a pen i is held on his seat and usually the immediate The connection between the working chamber and the rear of the piston completes, The central opening in the stuffing box-like cover j is oil-tight by means of a Threaded plug k and sealing nut 1 closed.

In the known atomizers, if no leakage pipe is provided, over time the small joints on the back of the piston, which penetrate behind the piston, create a resistance which prevents the piston from moving up. This is avoided according to the invention by the new overflow line, which lets out the excess through channel e and valve lt while compressing the light spring i.

The effect is explained as follows: The fuel pump causes a such a sudden increase in pressure on the underside of the piston d, (let the elasticity the liquid or, if air or vapors are mixed in, the mixture and of the parts contained therein absorb and effect energy, (let the excess into the space under the piston through the valve 1i, returns as soon as possible the pressure under your piston from the liquid entering the combustion chamber gets smaller.

In the embodiment according to Fig. A, clas' contains water-cooled at in Housing a middle fuel valve u with control piston for (read at o entering and at p light ignition oil acting on piston d, while (read valve r, which the middle valve encloses n, for the heavier or less easily combustible Fuel is determined, which enters at s and on the area t of the 1-l ohlkolbens zc works. The overflow line e and the valve lt are similar to the embodiment of Fig. i between the free passages f and the working chamber z, the easy one Arranged fuel.

Claims (1)

PATENT CLAIM: Device for injecting pure fuel into internal combustion engines, in which the needle valve provided one or more times carries a control piston influenced by the fuel pressure, characterized by the arrangement of an overflow line (e) with a check valve (h) for the return line, which is advantageously located in the atomizer itself of leak fuel from the space behind the control piston (c, d) into the working chamber on the needle valve side of the piston.