EP0148078A2 - Anlassvorrichtung für eine Brennkraftmaschine inbesondere für eine Freikolbenmaschine - Google Patents

Anlassvorrichtung für eine Brennkraftmaschine inbesondere für eine Freikolbenmaschine Download PDF

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Publication number
EP0148078A2
EP0148078A2 EP84402673A EP84402673A EP0148078A2 EP 0148078 A2 EP0148078 A2 EP 0148078A2 EP 84402673 A EP84402673 A EP 84402673A EP 84402673 A EP84402673 A EP 84402673A EP 0148078 A2 EP0148078 A2 EP 0148078A2
Authority
EP
European Patent Office
Prior art keywords
engine
chamber
starting device
spring
action
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84402673A
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English (en)
French (fr)
Other versions
EP0148078A3 (de
Inventor
Auguste Moiroux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bmb Civile Ste
Original Assignee
Bmb Civile Ste
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bmb Civile Ste filed Critical Bmb Civile Ste
Publication of EP0148078A2 publication Critical patent/EP0148078A2/de
Publication of EP0148078A3 publication Critical patent/EP0148078A3/de
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B71/00—Free-piston engines; Engines without rotary main shaft
    • F02B71/02—Starting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
    • F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air

Definitions

  • a compressed air tank called a start-up tank, which can be placed in communication with several combustion chambers of the engines having an output shaft, at least one of the mobile assemblies generally being in a position. suitable, close to neutral "UP".
  • the starting tank is on the contrary, and preferably, placed in communication with the mattress chamber, the moving element having been brought beforehand to a suitable position, close to neutral "LOW" .
  • the subject of the invention is therefore a starting device for an internal combustion engine, and in particular for a free piston engine, overcoming the drawbacks which have just been mentioned and also ensuring great safety in starting the engine.
  • the starting device comprises two controlled valves: sequentially and arranged on the communication conduit between the starting tank and the chosen chamber of the engine (combustion chamber or mattress chamber, in particular in in the case of a free piston engine).
  • the first valve called the opening valve, occupies, when the engine is stopped, its closed position in which it is held by a first spring.
  • the second valve called the shut-off valve, occupies, on the contrary, its open position when the engine is stopped and is held there by a second spring.
  • valve control can be carried out very quickly and at precisely determined times.
  • a precise duration of the communication between the chosen chamber of the engine and the starting tank is a necessity for obtaining an immediate starting of the engine.
  • this arrangement does not require a high air pressure and above all does not lead to large dead volumes which would be particularly troublesome in the case of a free piston engine.
  • Figure 4 is a schematic view of an alternative embodiment of one of the organs of the starting device.
  • FIG. 1 we see a direct-acting free-piston motor-compressor designated by the general reference 1 and comprising a movable assembly 2.
  • the driving piston 3 evolves in the combustion chamber 4 while the piston 5 of the compressor moves in the chamber 6.
  • An intermediate piston 7 moves, on the one hand, in the chamber 8 and thus constitutes a scanning pump communicating with the scanning chamber 9, on the other hand, in the mattress chamber 10.
  • the moving assembly 2 When stationary, and as shown in the drawing, the moving assembly 2 is in an intermediate position between the neutral position "UP" on the left of the figure and the neutral position "LOW".
  • the starting device essentially comprises a starting tank 11 capable of being filled with compressed air by an independent compressor which will be described later, and a set, designated by the general reference 12, of two valves arranged between the tank 11 and the mattress chamber 10.
  • At least one wall 13 is disposed transversely to the conduit connecting the reservoir 11 and the mattress chamber 10. It has an orifice 14 which can be closed by the head of one or the other valve of the assembly 12 and the edges of this orifice 14, on either side of. the wall 13, are shaped as a valve seat 15 and 16.
  • a first valve called the opening valve, comprises a head 17 mounted on a rod 18 passing through the orifice 14. The end. mity of the rod 18 is linked to a piston 19 evolving in a chamber 20 and thus constituting a control cylinder.
  • a second valve called a shut-off valve, has a head 21 mounted on a rod 22, the end of which is open in the form of a cup 23.
  • the two valves are coaxial, the rod 18 of the opening valve sliding in the hollow rod 22 of the closing valve, the rod 22 being itself guided in a shoulder 24 of the casing of the device.
  • a first spring 25 is supported on the opposite faces of the piston 19 and the cup 23, while a second spring 26, the stiffness of which is significantly greater than that of the spring 25, is supported on the cup 23, on the opposite side to the spring 25 and on the shoulder 24.
  • the closing valve 21 is held in the open position by its spring 26, while the opening valve 17 is supported on its seat 15 under the action of the spring 25.
  • the dimensions of the rods 18 and 22 of the valves are such that a certain distance 1. 1 exists at rest between the piston 19 and the cup 23.
  • a damping washer 27 On the other hand on one or the other of the opposite faces of the piston 19 and of the cup 23 is mounted a damping washer 27 whose utility will appear later.
  • the chamber 20 of the control jack is capable of being placed in communication with a control tank 28 by means of a calibrated orifice 29.
  • the latter is normally closed by a shutter 30 held on its seat 31 by a spring 32
  • the shutter 30 is however shaped so that it constitutes a piston capable of pushing the spring 32 under the action of the air pressure in the control tank 28.
  • the shutter 30 has example a shoulder 33 but it is obvious that any other equivalent arrangement could be provided.
  • the shutter 30 preferably has an orifice 34 s - capable of being closed by a fixed needle 35 when the shutter leaves its seat 31.
  • the needle 35 also constitutes a stop limiting the opening movement of the shutter 30.
  • the start-up 11 and control tanks 28 are filled by an independent air compressor 36 driven, for example by an electric motor 37.
  • the discharge pipe 38 of the compressor 36 communicates directly, via the pipe 39, with the tank 11 and, by means of a non-return valve 40, disposed between the pipes 41 and 42, with the reservoir 28.
  • a non-return valve 40 disposed between the pipes 41 and 42, with the reservoir 28.
  • the latter will also be in communication, via the pipes 43 and 44 and the valves non-return 45 and 46, respectively with the mattress chamber 10 and with the discharge duct 47 of the compressor 5-6.
  • the suction duct 48 of the independent compressor 36 is connected to the central chamber 49 of a slide distributor 50.
  • the latter is subjected to the action of a spring 51 which normally keeps it in abutment to the left of the figure in a fixed position such that the central chamber 49 communicates with the mattress chamber 10 via the pipe 52.
  • the drawer 50 however has an extension 53 (or is coupled to an equivalent member) penetrating into the mattress chamber 10 and capable of be operated by the equi mobile page 2, under conditions which will be indicated below to move the drawer 50 to the right of the figure.
  • the central chamber 49 comes into communication with the atmosphere via the pipe 54.
  • the left end of the drawer 50 finally constitutes a jack supplied by the pipe 55 in communication with the control tank 28 via the pipe 42. This is also connected to the control members (not shown) of the motor 1.
  • the electric circuit of the motor 37 advantageously comprises, in addition to a general switch 56, a manostatic switch 57 controlled, in the direction of opening of the circuit, by the pressure in the scanning chamber 9 of the motor 1.
  • the motor 1 and the various organs of its starting device being in the positions shown in FIG. 1, the main switch 56 is closed to operate the compressor 37.
  • the suction duct 48 being connected to the mattress chamber 10, the latter empties of the air it contained and the moving assembly 2 moves to the right of FIG. 1 until it reaches the position shown in FIG. 2.
  • the drawer 50 is pushed back to the right and the suction duct 48 is then placed in communication with the atmosphere by the chamber 49 and the pipe 54.
  • the air sucked into the mattress chamber 10 and then to the atmosphere 28 is discharged by the compressor 36, on the one hand towards the starting tank 11, on the other hand towards the control tank 28.
  • the air pressure increases in each of these two tanks. It will be noted here that any air leaks between the shutter 30 and its seat 31 will be evacuated to the atmosphere through the orifice 34 without this resulting in an annoying movement of the shutter 30 against the action of its spring 32.
  • the orifice 34 ensures complete discharge of the control cylinder 19-20 and prevents any displacement of the opening valve 17.
  • the opening of the valve 17 is all the more rapid as soon as the lifting of the head, the pressures on the two faces of it are balanced.
  • the stroke of the jack 19 continues over the distance L I until it comes to bear on the damping washer 27 of the cup 23.
  • the jack 19, bearing on the cup 23, causes the displacement to the right, following a stroke L 2 , of the valve 21 which abruptly applies on its seat 16 and close the orifice 14.
  • the pressure is maintained in the chamber 20 and the various members remain in the positions shown in FIG. 3, since the compressor 37 continues to fill the control reservoir 28.
  • control shutter 30 it may in fact be advantageous to modify the initial compression of the spring 32, in particular as a function of the ambient temperature.
  • a movable stop 58 connected to the housing by a deformable waterproof sleeve 59, filled with a thermostatic fluid.
  • the deformation of the sleeve 59 is opposed to a spring 60, the compression of which is adjustable by means of a screw 61.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
EP84402673A 1984-01-04 1984-12-20 Anlassvorrichtung für eine Brennkraftmaschine inbesondere für eine Freikolbenmaschine Withdrawn EP0148078A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8400082A FR2557633B1 (fr) 1984-01-04 1984-01-04 Dispositif de demarrage pour moteur a combustion interne, en particulier pour moteur a piston libre
FR8400082 1984-01-04

Publications (2)

Publication Number Publication Date
EP0148078A2 true EP0148078A2 (de) 1985-07-10
EP0148078A3 EP0148078A3 (de) 1985-08-28

Family

ID=9299833

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84402673A Withdrawn EP0148078A3 (de) 1984-01-04 1984-12-20 Anlassvorrichtung für eine Brennkraftmaschine inbesondere für eine Freikolbenmaschine

Country Status (2)

Country Link
EP (1) EP0148078A3 (de)
FR (1) FR2557633B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015231A1 (de) * 1989-06-08 1990-12-13 Frank Stelzer Anlasser für einen einen freifliegenden stufenkolben aufweisenden motor
FR2660969A1 (fr) * 1990-04-12 1991-10-18 Minoru Rech Avancee I Systeme de moteur a piston libre.

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754701C (de) * 1942-11-21 1954-08-16 Messerschmitt Boelkow Blohm Verfahren und Vorrichtung zur Vermeidung der schaedlichen physikalischen und chemischen Einwirkungen von Pulver-verbrennungsrueckstaenden auf die Wandungen der Druckgas-kammern von Druckgasanlassern fuer Brennkraftmaschinen
FR1001194A (fr) * 1946-03-22 1952-02-20 Soc Es Energie Sa Perfectionnements apportés aux dispositifs de démarrage pneumatique, notamment pour les machines à pistons libres
FR1048425A (fr) * 1950-09-09 1953-12-22 Soupape à double fermeture et en particulier soupape à fermeture rapide
FR1439104A (fr) * 1965-03-23 1966-05-20 Anciens Etablissements Panhard Perfectionnements apportés aux dispositifs de mise en marche des moteurs monocylindriques à piston libre à double effet
FR2264184A1 (en) * 1974-03-15 1975-10-10 Moiroux Auguste Starting device for free piston engine - uses slide valve to reduce and then increase pressure of air cushion

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990015231A1 (de) * 1989-06-08 1990-12-13 Frank Stelzer Anlasser für einen einen freifliegenden stufenkolben aufweisenden motor
FR2660969A1 (fr) * 1990-04-12 1991-10-18 Minoru Rech Avancee I Systeme de moteur a piston libre.

Also Published As

Publication number Publication date
EP0148078A3 (de) 1985-08-28
FR2557633B1 (fr) 1986-05-30
FR2557633A1 (fr) 1985-07-05

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Inventor name: MOIROUX, AUGUSTE