FR2490737A1 - INTERNAL COMBUSTION ENGINE HEAD WITH INJECTOR - Google Patents

Abstract

INTERNAL COMBUSTION ENGINE 1 SHAFT FITTED WITH AN INJECTOR 2. ENGINE BOX 1 CHARACTERIZED IN THAT THE LOWER END OF REDUCED DIAMETER OF INJECTOR 2 IS FIXED TO THE BOTTOM 131 OF A BORE 13 DRILLED IN THE ENGINE HEAD WITH INTERNAL COMBUSTION 1, EITHER DIRECTLY, OR THROUGH A SEALING WASHER 3, THE FIXATION BEING PROVIDED BY MEANS OF A SOCKET SCREW 5 SCREWED INTO THE MOTOR HEAD 1 AND AT THE SAME TIME ATTACHING THE END 41 D '' A SUPPLY DUCT 4 AT THE BORE, AT THE LOCATION OF THE UPPER END OF THE INJECTOR, WITH THE INTERPOSITION OF A WASHER 42 AND POSSIBLE THROUGH AN EXPANSION ELEMENT 6 LOCKED IN THE SCREW HOLLOW 5. THE INVENTION APPLIES TO INTERNAL COMBUSTION ENGINES WITHOUT SPARKS.

Description

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  The invention relates to a motor head to

  internal combustion with an injector with a closed injection nozzle

  through a hole or possibly a small stem, this

  injector also having a differential pin.

  at once under the action of the fuel pressure

  towards the injector, against the action of an

  prestressing, and under the action of

  rant in a closed space above the bro-

  differential, the fuel inlet inlet is

in the axis of the injector.

  The forms of injectors known hitherto are fixed in the head of the internal combustion engine by means of a flange provided with two screws as well as various assembly plates and possibly a hollow screw. These conventional means push the injector into the bottom of a hole in the head of the internal combustion engine so that the injector comes to be lodged against a conical seat or plane with

  interposition of a sealing washer. This allows to obtain

  seal the injector sufficiently so that the gases

  can not escape from the combustion chamber. One

  power supply is connected by another connector of

  pipes, to the injector mounted in the manner indicated above.

  The fuel delivered by an injection pump arrives in the

  jector by this supply line.

  These known forms of mounting the injector

  in the head of the internal combustion engine are too complicated

  the need for two separate sealing elements for the injector and for the

  leads to a reduction in the reliability of the system.

  The invention aims at overcoming the disadvantages

  above with the prior art by creating a new form

  advanced and advanced internal combustion engine head

  provided with an injector, to avoid these disadvantages.

  For this purpose, the invention relates to an internal combustion engine head provided with an injector with a closed injection nozzle through a hole or possibly a small rod, this injector also comprising a differential pin opening at the same time under the action of the fuel pressure

  directed towards the injector against the action of an

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  prestressing, and under the action of

  rant in a closed space above the bro-

  differential, the fuel inlet inlet is

  in the axis of the injector, the motor head characterized in that the lower end of reduced diameter of the injector is fixed to the bottom of a bore drilled in the internal combustion engine head, either directly or by through a sealing washer, the fixing being provided by means of a hollow screw simultaneously fixing the end of a pipe

  boring feed at the end of the upper

  top of the injector, with the interposition of a washer and possibly via an expansion element housed in the hollow screw, this hollow screw, traversed by the supply pipe, screwing directly into the motor head with internal combustion or possibly in a body

  intermediate attached to this engine head.

  The dilation element can be made under

  the shape of a hollow cylinder made of a material having a coeffi-

  higher thermal expansion than the material

  constituting the head of the internal combustion engine.

  This expansion element can also be

  realized in the form of a highly prestressed spring.

  The invention will be better understood when reading

  of the following detailed description of a preferred example of

  shown in the attached single figure illus-

  drawing a schematic drawing of a combustion engine head

internal device according to the invention.

  In a bore 13 of a head 1 of internal combustion engine without candle, can move an injector 2 of known form. Between the lower end of reduced diameter of the injector 2 and the bottom 131 of the bore 13 is located

  placed a sealing washer 3. A radial pin 22 pushes

  in the upper part of the injector 2, is guided in

  a longitudinal groove 12 of the head 1 of the combustion engine

  the pin setting the desired position of the in-

jector 2.

  In a hole drilled in the upper part of the injector 2 is housed the end 41 of a supply line 4 passing through a hollow screw 5 screwing in a thread 11 of the head 1 of the internal combustion engine , the connection being provided by a washer 42 and possibly also by an expansion element 6 housed in the hollow screw, the pressure pushes at the same time the end of reduced diameter

  of the injector 2 against the bottom 131 of the bore 13, with

  position of the sealing washer 3 pocking the gases from the combustion chamber of the internal combustion engine without a spark plug,

  to escape along the injector 2.

  Between the washer 42 and the hollow screw 5 is housed an expansion element 6 in the form of a hollow cylinder made of a material whose coefficient

  thermal expansion is greater than the expansion coefficient

  of the material constituting the head 1 of the motor

  internal combustion, this expansion element possibly

  It must be a strongly prestressed spring.

  The reason for using this device is that in the case of internal combustion engines operating at

  high temperature, mutual pressure at the point of contact

  may not decrease as a result of differences in values between thermal expansion coefficients of head 1 of

motor, and injector 2.

  Although a preferred embodiment of the invention has been illustrated and described here, it is obvious that this embodiment is in no way limiting and that numerous modifications and variants are possible.

  while remaining within the scope of the invention.

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Claims (1)

CLAIMS) Internal combustion engine head (1) equipped with an injector (2) with a closed injection nozzle through a hole or possibly a small rod, this injector (2) also including an opening differential pin both under the action of the fuel pressure directed towards the injector against the action of a biased prestressed spring, and under the action of the fuel pressure prevailing in a closed space disposed above the differential pin, the fuel intake citrate located in the axis of the injector, motor head (1) characterized in that the lower end of reduced diameter of the injector (2) is fixed to the bottom (131) of a bore (13) drilled in the internal combustion engine head (1), either directly or via a sealing washer (3), the fixing being ensured by means of a hollow screw (6) simultaneously fixing the end (41) of a supply pipe (4) to the bore, at the upper end of the injector, with the interposition of a washer (42) and optionally via an expansion element (6) housed in the hollow screw (5), this hollow screw, traversed by the supply pipe (4), directly screwing into the head (1) of the internal combustion engine or possibly into an intermediate body fixed to this head engine.   20) Motor head fitted with an injector, according to   claim 1, characterized in that the expansion element   6) is produced in the form of a hollow cylinder in a material having a coefficient of thermal expansion greater than that of the material constituting the motor head (1). internal combustion.   ) Motor head with an injector, according to   any of claims 1 and 2, characterized in that   that the expansion element (6) is in the form of a strongly prestressed spring.