EP0045472B1 - Hydraulikgenerator mit einer Freikolbenmaschine - Google Patents

Hydraulikgenerator mit einer Freikolbenmaschine Download PDF

Info

Publication number
EP0045472B1
EP0045472B1 EP81105943A EP81105943A EP0045472B1 EP 0045472 B1 EP0045472 B1 EP 0045472B1 EP 81105943 A EP81105943 A EP 81105943A EP 81105943 A EP81105943 A EP 81105943A EP 0045472 B1 EP0045472 B1 EP 0045472B1
Authority
EP
European Patent Office
Prior art keywords
piston
free
engine according
hydraulic generator
hydraulic
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.)
Expired
Application number
EP81105943A
Other languages
English (en)
French (fr)
Other versions
EP0045472A1 (de
Inventor
Pierre Bouthors
Olivier Breting
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.)
Regie Nationale des Usines Renault
Original Assignee
Regie Nationale des Usines Renault
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 Regie Nationale des Usines Renault filed Critical Regie Nationale des Usines Renault
Publication of EP0045472A1 publication Critical patent/EP0045472A1/de
Application granted granted Critical
Publication of EP0045472B1 publication Critical patent/EP0045472B1/de
Expired legal-status Critical Current

Links

Images

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
    • F02B75/00—Other engines
    • F02B75/04—Engines with variable distances between pistons at top dead-centre positions and cylinder heads
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
    • F01B11/00—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type
    • 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
    • F02B71/04—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby
    • F02B71/045—Adaptations of such engines for special use; Combinations of such engines with apparatus driven thereby with hydrostatic transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F3/00—Pistons 
    • F02F3/16—Pistons  having cooling means
    • F02F3/20—Pistons  having cooling means the means being a fluid flowing through or along piston
    • F02F3/22—Pistons  having cooling means the means being a fluid flowing through or along piston the fluid being liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
    • F04B19/003—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00 free-piston type pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/02—Stopping, starting, unloading or idling control
    • F04B49/022—Stopping, starting, unloading or idling control by means of pressure
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
    • 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

Definitions

  • the invention relates to a hydraulic generator with a free piston engine with hydropneumatic return mattress and an associated piston for pumping hydraulic fluid supplying a hydraulic accumulator.
  • French patent 1,256,066 already discloses a free piston engine used as a gas generator. The locking and unlocking control of the free piston is done manually, so that a fully automatic operation is not obtained.
  • the object of the present invention is to allow simple, fully automatic and intermittent satisfactory operation of the free piston engine to charge a hydraulic accumulator, thereby enabling good performance and non-pollution conditions to be obtained.
  • the object of the present invention is also in such a hydraulic generator to obtain a greater initial acceleration of the free piston working against the hydropneumatic return mattress before pumping and to reduce the heat losses through the walls at the start of the cycle.
  • the hydraulic generator with free piston engine comprises a hydropneumatic return mattress, a hydraulic fluid pumping piston sliding in a pump body and supplying a receiver, a device for locking the free piston in the detent dead center and for the means for controlling this locking device.
  • the receiver is a hydraulic accumulator intended to be charged between two determined pressure levels.
  • the control means of the locking device are slaved to means for detecting the two aforementioned pressure levels.
  • the pumping piston is a differential piston having a part sliding in the pump body and a central part of smaller diameter.
  • the hydropneumatic return mattress has an opening capable of being closed by the central part of the differential pumping piston, after a certain initial driving stroke of the free piston.
  • a pumping chamber towards the accumulator is provided in the pump body between the part of the pumping piston sliding in the pump body and the hydropneumatic mattress.
  • the pumping can be located in an intermediate fraction of the stroke of the free piston by putting the hydropneumatic mattress in communication with the pumping chamber in the final phase of the stroke of said differential piston, having an intercommunication passage formed at this point. effect.
  • the means for detecting the aforementioned lowest pressure level cooperate with means for reconditioning the hydropneumatic mattress from the accumulator, and means are provided for delaying the actuation of the servo means of the locking device. or unlocking after actuation of said reconditioning means.
  • pumping can be provided using two differential pistons constituted by weights with symmetrical and reverse movement relative to that of the free piston, these weights being actuated hydraulically by means of 'at least one transfer piston rigidly secured to the free piston.
  • the free piston can, within the framework of the aforementioned provisions, be cooled by means of an inertia piston placed in a cooling circuit supplied by the hydraulic fluid for transmitting movement or the pumping circuit.
  • the hydraulic generator represented in FIG. 1 comprises a single-cylinder free piston engine operating in a two-stroke cycle, of which 1 has been designated by the casing, 2 the cylinder head, 3 the piston, 4 a fuel injector, 5 a spark plug. 'ignition.
  • the casing constitutes, in a manner known under the piston, a chamber 6 for suction and compression of air for filling and sweeping the cylinder brought by a pipe 7 to an intake port 8 which, as well as an exhaust port 9, are uncovered by the piston 3 in the vicinity of its detent dead center, while a port 10 for suction air in the housing is fitted with a non-return valve 11.
  • the piston 3 is provided with a rod 12 passing through the casing and which is integral with a pumping piston 13 sliding along the same axis as the free piston in a hydraulic pump body 14 extended by a hydropneumatic mattress 15, with membrane 16 separating a capacity of pressurized gas 17 from the hydraulic fluid present in the mattress and pump body.
  • the pumping piston 13 is a differential piston having a part 13a of smaller diameter than its part 13b sliding in the body 14, the part 13a being intended to slide into an inlet 18 of the hydraulic enclosure 19 of the mattress hydropneumatic, after a certain amplitude of initial driving stroke of the free piston indicated in 20.
  • the part 13b of the differential piston acts as a piston for discharging the hydraulic fluid present in the pumping chamber 21, then delimited between piston 13 and mattress, and which permanently communicates with a chamber 22 provided with at least one valve.
  • suction 23 and a discharge valve 24 are placed on a conduit connected to the tank of the hydraulic circuit by a usual low pressure booster pump not shown.
  • the discharge valve 24 is connected by a conduit 25 to the hydraulic enclosure of a hydraulic pressure accumulator shown diagrammatically at 26.
  • the maximum pressure in the mattress being permanently maintained lower than the minimum pressure prevailing in the accumulator, as as will be seen later, it follows that the pumping phase towards the accumulator therefore does not begin until after the initial driving stroke 20 of the sole pressurization of the mattress.
  • the pumping phase is limited to an intermediate fraction of the total stroke amplitude 27 of the free piston, in that the part 13a of the differential pumping piston has lateral passages 28 which come to put, in the final fraction 29 of the total stroke amplitude 27, the hydropneumatic mattress 15 again in communication with the pumping chamber 21. It is also possible to give the valve chamber 22 a divergent inlet 30 capable of introducing a reduction in the speed of the fluid near the valves in the effective pumping stroke.
  • the free piston 3 can be locked in the detent dead center, that is to say after the total stroke amplitude 27, by means of latches 31 cooperating with corresponding notches 32 of the piston rod 12 and subjected to an electromagnetic control comprising an electromagnet 33, the mobile assembly of which is connected by connecting rods 34, 35 to a cam 36 governing the placing in active or passive position of two sliders 37 which carry the spring-loaded latches 31 and which are mounted sliding with dovetail on supports 39 formed in the casing.
  • the slides are normally biased in the locking position by springs 40, when the electromagnet 33 is not energized.
  • Such a motor is normally stopped in the locked position in the dead center of expansion by de-excitation of the electromagnet 33. It is intended to operate intermittently under optimal or favorable conditions of efficiency for charging the hydraulic accumulator 26 between two values pressure detected by a pressure gauge 41, having an electrical contact 41a for minimum pressure detection and an electrical contact 41b for maximum pressure detection. It is of course also possible to plan to start it if necessary on demand when it is certain to be largely within the range of these detected pressures.
  • FIG. 1 An automatic start or restart command in response to the minimum pressure detection in the hydraulic accumulator 26 is illustrated as an example in FIG. 1, from the contact 41a for minimum pressure detection; in parallel with which there has been shown a push-button contact 42 intended to be actuated temporarily by the user for possible activation on the aforementioned request, after having been closed a switch 43 with contact 43a for general energization control circuits, with contact 43b for the electrical supply of the ignition circuit and of the fuel injection control which will be discussed later, this switch 43 also authorizing the possible excitation of the electromagnet 33 by its contact 43c.
  • This start command includes a monostable flip-flop 44 whose input is connected via a differentiator circuit 44a to the contact 41a and to the push-button contact 42.
  • This flip-flop 44 responds to the rising edge of the signal emitted by the closure from one or other of these contacts, and its output then emits a signal of predetermined duration intended to cause an appropriate re-pressure of the hydropneumatic mattress 15 from the accumulator 26, prior to unlocking the free piston.
  • This re-pressure of the mattress is provided by means of a solenoid valve 45, excited by means of an amplifier 46, supplied with fluid by the accumulator 26 and connected to the inlet of a pressure reducer 47 whose outlet at reduced pressure is connected via a normally open solenoid valve 48 to the hydraulic enclosure 19 of the mattress.
  • the pressure reducer 47 is of the type with reduced pressure partly controlled as a function of the effective pressure in the accumulator 26 (introduced by the link 49) and with a valve for relieving the reduced pressure at the tank in the event of 'excess.
  • the start command also includes another monostable rocker 50 whose input is connected to the output of the rocker mo nostable 44 and which responds to the falling edge of the output signal of the latter (that is to say at the end of re-pressure of the mattress 15) by a signal which is applied, by means of an amplifier 51, to a self-holding relay 52, the normally open contact 52a closes, when the relay is energized, the excitation circuit of the electromagnet 33 governing the unlocking of the free piston.
  • This circuit also comprises the contact 43c of the switch 43, the opening of which makes it possible to voluntarily stop the engine.
  • This command thus allows the restarting of the engine stopped at the detent dead center, after recharging the mattress 15 followed by the unlocking of the free piston, released for a compression phase, ignition and a suitable injection of fuel being provided to restart the engine. on a single compression stroke of the free piston thus prepared and triggered.
  • the electrical contact 41 b closes and causes the excitation of a relay 54 whose normally closed contact 54a is placed in the self-holding circuit of the relay 52, which it then opens, so that the contact 52a reopens and the electromagnet 33 ceases to be energized, that is to say that the locking of the free piston is is then carried out on its first passage to the detent dead center by the latches 31.
  • the engine remains stopped in this position, even when the electrical contact 41 b reopens due to a drop in pressure in the accumulator 26.
  • the contact 54a closing and resetting the self-holding circuit of the relay 52, so that a new start of the engine can, as previously explained, be generated by the next closing of the contact 41a for detecting minimum pressure in the accumulator 26.
  • the ignition can be triggered by means of a position sensor of the free piston or of a part linked to it, such as the pumping piston 13, here provided with a magnet 13c with which cooperates in the vicinity of the top dead center a magnetic or inductive type sensor 55, which is external to the pump body in this non-magnetic case and connected by a shaping circuit 56 to a high energy trigger device 57 of sparks at the spark plug 5.
  • a position sensor of the free piston or of a part linked to it such as the pumping piston 13, here provided with a magnet 13c with which cooperates in the vicinity of the top dead center a magnetic or inductive type sensor 55, which is external to the pump body in this non-magnetic case and connected by a shaping circuit 56 to a high energy trigger device 57 of sparks at the spark plug 5.
  • the injector 4 can be of the electromagnetic type actuated by means of an electronic control 58 adapted to produce a control pulse triggered from the output signal from the shaping circuit 56, and having a variable duration regulating the quantity of fuel injected as a function of storing in this command 58 an injection law as a function of the pressure prevailing in the accumulator 26, this latter information being transmitted to it via a transducer 59 of the type analog or digital, in order to adapt the quantity of fuel injected to the required pumping effort which varies with the effective pressure prevailing in the accumulator.
  • Such regulation by electronic means can easily be brought into play at each cycle, in a manner known per se.
  • the injector could also be in particular a triggered injector controlled by the sensor 55 and shaping circuit 56, and with direct hydraulic control of the quantity of fuel injected at the effective pressure prevailing in the accumulator 26.
  • a rectilinear guide of the movable assembly of the motor is here ensured by means of a roller 63 whose axis is fixed on the casing and which cooperates with an axial groove 12a of the rod piston 12.
  • the first 60 of the three aforementioned sensors is located so as to detect that there has been ignition of the fuel mixture but that the stroke of the piston is insufficient if it is only activated.
  • the second 61 is located so as to detect that the travel is sufficient, while the third 62 is located so as to detect if the travel is excessive compared to that provided.
  • repositioning means comprising a friction roller 64 intended to cooperate with the piston rod 12 and which is driven by a hydraulic motor 65 which is supplied from the accumulator 26 and linked by a flange with the movable member 66 of a hydraulic cylinder 67 also actuable from the accumulator 26, by means of a solenoid valve 68 common to the supply of the cylinder 67 and to that of the motor 65.
  • the triggering of this procedure is also used to deactivate the locking electromagnet 33, for example by cutting the self-holding circuit of the relay 52 until the free piston is relocked.
  • damping is provided at the end of the rebound stroke. of the free piston by cooperation of the pumping piston 13 with an elastic end-of-travel stop 70 with a non-linear characteristic.
  • This incident can then be signaled by an abnormal stroke detection carried out using an additional sensor 72, cooperating with the magnet 13a carried by the pumping piston, and serving to immediately actuate an engine stop command, for example by means of a self-holding cut-off relay not shown in FIG. 1 of the supply circuit of the control electromagnet 33 for locking the free piston.
  • the inertia piston 73 is here crossed in its axis by a channel comprising a non-return valve 73a.
  • Fig. 3 illustrates a variant according to which, for the purpose of dynamic balancing of the entire generator, pumping is provided by means of two differential pistons 78, 79 constituting two weights with symmetrical and reverse movement with respect to that of the piston free 3.
  • These pistons are for this purpose arranged in two pump bodies 80, 81 parallel and symmetrical with respect to the axis of translation of the free piston, the rod 82 of which carries a transfer piston 83 sliding in a cylinder 84 connected to two pump bodies and containing a hydraulic fluid which transmits force and movement between the transfer piston 83 and the differential pistons 78, 79 and vice versa.
  • Each differential piston 78, 79 cooperates with a hydropneumatic mattress 85, 86 with which it delimits a pumping chamber 87, 88 communicating with a valve chamber 89, 90, the latter two supplying in parallel the hydraulic accumulator not shown of this generator. .
  • end-of-travel end stops for these are provided at 91 and 92 in their respective pump bodies 80, 81, as well as end stops pumping stroke such as the stop 93, while a stop 94, equivalent to the safety stop 70 of FIG. 1, is arranged in the cylinder 84 of the transfer piston 83.
  • the ignition trigger, injection and stroke monitoring sensors of the free piston can likewise be installed on the cylinder 84 and cooperate with the transfer piston 83 in the manner already set out for the pumping piston 13 in FIG. . 1.
  • a restart procedure in the event of a failure can also be implemented as already explained.
  • FIG. 4 An example of means making it possible to ensure, in such embodiments, the race monitoring procedure, governing injection regulation, restarting in the event of a failure and the safety stop, is moreover illustrated in FIG. 4, in which the sensors 55, 60, 61, 62 and 72 are found staggered in their order of installation, respectively followed by the shaping circuits 56, 95, 96, 97 and 98.
  • the circuit for shaping the signal from the sensor 60 as well as the circuit for shaping the signal from the sensor. 61 are connected to the counting input of a binary counter. 99, the reset input of which is connected to the output of the shaping circuit 56 of the sensor signal 55, by means of a delay circuit 100, and the first two outputs of which are respectively connected to the inputs counting C and down counting D of a binary up-down counter 101, whose reset input is also connected to the output of the self-timer circuit 100.
  • the rank 1 output of the up-down counter 101 is connected to the electronic control 58, to which is also connected the output of an AND circuit 102 to the inputs of which the outputs of rank 1 and 4 of the up-down counter are connected.
  • the circuit 97 for shaping the signal from the sensor 62 is also connected to the down-counting input D of the up-down counter 101.
  • the timed trigger 104 continues to be loaded with a view to its triggering by the flip-flop 103 (instead of undergoing a cycle load short followed by a discharge cycle) and it then emits an excitation signal from the self-sustaining relay 105.
  • the contact 105a of the latter is connected to the solenoid valves 48 and 69 which then ensure the exhaust of the enclosure of the hydropneumatic mattress and the pumping chamber 21, and to the solenoid valve 68 which supplies the actuator 67 and the hydraulic motor 65 for driving the roller 64 cooperating with the piston rod 12 to return the free piston to the end position of the rebound and locking stroke, it should be noted that the contact 105b which has opened is placed in series with the contact 54a in the holding circuit of the relay 52, that is to say that it causes the de-excitation of the latter and of the electromagnet 33 of the locking device, so that the latches 31 are biased in locking position of the free piston while waiting for the slots 32 to pass in front of them.
  • the return of the free piston to the locked position is here detected by the signal from the sensor 62 of excessive travel, which then triggers the cut-off of the switch 106 and therefore that of the relay retaining circuit 105, the contact 105a of which opens again. de-energizes the solenoid valves 48, 68 and 69 and the closing contact 105b of which has no effect on the relay 52.
  • the contact 105a is connected via an adaptation circuit 108 to the input of a monostable flip-flop 109 responding to the falling edge of the solenoid excitation signal, and the output of which is connected to the inputs of amplifier 46 and of the monostable flip-flop 50 so as to trigger the start-up procedure already described using the Figure 1 from the locked position of the free piston.
  • a binary counter 110 is also provided whose counting input is connected to the output of the adaptation circuit 108 and of which the outputs of rank 1 and 2 are connected to an AND circuit 111, the output of which is connected by an amplifier gate 112 to an indicator light 113 indicating failure.
  • the resetting of the counter 110 can result from a usual reset circuit of the electrical components intervening at each general energization of the electrical equipment of the vehicle carried out by the contact 43a of the switch 43, while the self-maintaining relays above are returned to rest each time the power is turned off.
  • FIG. 4 also shows the means of the safety shutdown procedure from the activation of the sensor 72, the shaping circuit 98 of which is connected to a self-holding relay 114, normally closed, placed in the excitation circuit of the electromagnet 33 for locking the piston, which it therefore de-energizes in the event of an abnormal free piston stroke in order to lock it by cooperation of the latches 31 with the notches 32 of its rod 12, this safety stop also being the subject of a particular signaling not shown which may result from the closing of a second contact normally open of relay 114.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Vehicle Body Suspensions (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Electromagnetic Pumps, Or The Like (AREA)

Claims (17)

1. Hydraulikgenerator mit einer Freikolbenmaschine, bestehend aus einem hydropneumatischen Rückführungspolster (15), einem Pumpenkolben (13) für das hydraulische Fluid, der in einem Pumpengehäuse (14) gleitet und einen Empfänger speist, einer Verriegelungsvorrichtung für den Freikolben am Entspannungstotpunkt und Steuermitteln für diese Verriegelungsvorrichtung, dadurch gekennzeichnet, daß es sich beim Empfänger um einen Druckspeicher (26) handelt, der zwischen zwei vorbestimmten Druckniveaus gefüllt wird, wobei die Steuermittel der Verriegelungsvorrichtung von Fühlermitteln für die zwei vorgenannten Druckniveaus geregelt werden, und daß es sich bei dem Pumpenkolben (13) um einen Differentialkolben handelt, der einen Teil (13b) aufweist, der im Pumpengehäuse (14) gleitet und einen Mittelteil (13a) mit kleinerem Durchmesser hat, wobei das hydropneumatische Polster (15), dessen Druck geringer ist als der Mindestdruck im Druckspeicher, eine Öffnung aufweist, die von dem genannten Mittelteil des Differentialkolbens nach einem gewissen Anfangshub des Freikolbens verschlossen werden kann, wobei eine Pumpkammer (21) in Richtung auf den Druckspeicher zu im Pumpengehäuse zwischen dem Teil (13b) des Pumpenkolbens, der im genannten Pumpengehäuse gleitet, und dem hydropneumatischen Polster (15) ausgebildet ist.
2. Hydraulikgenerator mit einer Freikolbenmaschine gemäß Anspruch 1, dadurch gekennzeichnet, daß der genannte Teil des Differentialkolbens mit dem kleinen Querschnitt wenigstens einen Durchgang aufweist, der in einem letzten Bruchteil des Expansionshubs des Freikolbens die hydraulische Verbindung zwischen dem Polster und der genannten Pumpkammer herstellt.
3. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die Fühlermittel für das untere genannte Druckniveau mit Wiederherstellmitteln des hydropneumatischen Polsters aus dem Druckspeicher zusammenwirken, und daß Mittel vorgesehen sind, um die Betätigung der Regelmittel der Verriegelungs- bzw. Entriegelungsvorrichtung nach Betätigung der vorgenannten Wiederherstellmittel zu verzögern.
4. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß die genannte Pumpkammer über einen divergierenden Durchgang mit einer Kammer mit Ansaug- und Förderventilen in Verbindung steht.
5. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß der genannte Differentialkolben über eine Kolbenstange, mit der die Verriegelungsvorrichtung zusammenwirkt, mit dem Freikolben fest verbunden ist.
6. Hydraulikgenerator mit einer Freikolbenmaschine gemäß Anspruch 5, dadurch gekennzeichnet, daß der genante Differentialkolben einen Trägheitskolben einschließt, der in einem inneren Kühlkreislauf des Freikolbens angeord- . net ist, der durch die Kolbenstange strömt und mit der genannten Pumpkammer in Verbindung steht.
7. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem beliebigen der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß er zwei Differentialkolben enthält, die symmetrisch im Vergleich zur Bewegung des Freikolbens gegenläufige Reglergewichte bilden, wobei diese Reglergewichte mittels wenigstens eines Übertragungskolbens, der mit dem Freikolben über seine Kolbenstange fest verbunden ist, mit der die Verriegelungsvorrichtung zusammenwirkt, hydraulisch betätigt werden.
8. Hydraulikgenerator mit einer Freikolbenmaschine gemäß Anspruch 7, dadurch gekennzeichnet, daß am Ende der Laufstrecke der Reglergewichte elastische Anschläge vorgesehen sind.
9. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der Ansprüche 7 und 8, dadurch gekennzeichnet, daß der genannte Übertragungskolben einen Trägheitskolben einschließt, der in einem inneren Kühlkreislauf des Freikolbens angeordnet ist, der durch die Kolbenstange strömt und der mit dem Hydraulikfluid der Bewegungsübertragung zwischen dem Übertragungskolben und den Reglergewichten in Verbindung steht.
10. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der Ansprüche 5 oder 7, dadurch gekennzeichnet, daß der genannte Differentialkolben, der mit dem Freikolben oder mit dem genannten Übertragungskolben fest verbunden ist, mit einem elastischen Dämpferanschlag am Ende eines abnormalen Hubs zusammenwirkt.
11. Hydraulikgenerator mit einer Freikolbenmaschine gemäß Anspruch 10, dadurch gekennzeichnet, daß er mit einem Warnungsgeber für abnormalen Hub ausgerüstet ist, der mit Auslösemitteln der Verriegelungsvorrichtung zusammenwirkt.
12. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der Ansprüche 5 bis 11, dadurch gekennzeichnet, daß die Verriegelungsvorrichtung des Freikolbens mit Hilfe von FederriegeIn, die mit auf der genannten Kolbenstange angebrachten Verankerungsformen zusammenwirken, gebildet wird, wobei diese Riegel von Stößeln getragen werden, die von Steuermitteln zur Annäherung an bzw. zum Abrücken von der Kolbenstange betätigt werden.
13. Hydraulikgenerator mit einer Freikolbenmaschine gemäß Anspruch 12, dadurch gekennzeichnet, daß die Steuermittel zur Annäherung bzw. zum Abrücken eine Nocke beinhalten, die über einen Elektromagneten bewegt wird, dessen Entregung dem Verriegelungszustand der Vorrichtung entspricht.
14. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er einen Geber für das Ende des Kompressionshubs des Freikolbens hat, auf den die Mittel zur Auslösung des Einspritzvorgangs ansprechen.
15. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem beliebigen der vorstehenden Ansprüche, dadurch gekennzeichnet, daß er drei Geber für den Dekompressionshub des Freikolbens umfaßt, wobei der erste Geber für einen unvollständigen Hub mit Mitteln zur Verstärkung der Einspritzung zusammenarbeitet sofern er allein betätigt wird, der erste und der zweite Geber zusammen Geber für den normalen Hub sind, und der dritte Geber für einen übermäßigen Hub mit Mitteln zur Verringerung der Einspritzung zusammenwirkt.
16. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der Ansprüche 14 und 15, dadurch gekennzeichnet, daß die Mittel zum Auslösen der Einspritzung vom Wert des im Druckspeicher aufgenommenen Fluiddrucks gesteuert werden.
17. Hydraulikgenerator mit einer Freikolbenmaschine gemäß einem der Ansprüche 5 bis 16, dadurch gekennzeichnet, daß er Mittel zum Wiederanlassen des Motors im Falle eines Fehlstarts enthält, die Mitnehmerorgane mit selektivem Einklinken in die Kolbenstange umfassen, die betätigt werden können, um den Freikolben in die Verriegelungsstellung im Entspannungstotpunkt zurückzubringen, denen Mittel zum hydraulischen Entlüften des hydropneumatischen Polsters und der genannten Pumpkammer beigeordnet sind.
EP81105943A 1980-08-05 1981-07-28 Hydraulikgenerator mit einer Freikolbenmaschine Expired EP0045472B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8017288A FR2488344B1 (fr) 1980-08-05 1980-08-05 Generateur hydraulique a moteur a piston libre
FR8017288 1980-08-05

Publications (2)

Publication Number Publication Date
EP0045472A1 EP0045472A1 (de) 1982-02-10
EP0045472B1 true EP0045472B1 (de) 1986-03-05

Family

ID=9244907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81105943A Expired EP0045472B1 (de) 1980-08-05 1981-07-28 Hydraulikgenerator mit einer Freikolbenmaschine

Country Status (6)

Country Link
US (1) US4415313A (de)
EP (1) EP0045472B1 (de)
JP (1) JPS5752685A (de)
DE (1) DE3173974D1 (de)
ES (1) ES8206770A1 (de)
FR (1) FR2488344B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6863507B1 (en) 1999-11-24 2005-03-08 Mannesmann Rexroth Ag Generic free-piston engine with transformer valve assembly for reducing throttling losses

Families Citing this family (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001161A1 (en) * 1981-05-26 1987-02-26 Clark Garry E Fluid driven power plant
FR2538043A1 (fr) * 1982-12-21 1984-06-22 Mosser Yves Generateur hydraulique a moteurs thermiques a pistons libres
US4491095A (en) * 1983-07-20 1985-01-01 Avalon Research Cyclic dwell engine
EP0208683A1 (de) * 1984-03-07 1987-01-21 STELZER, Frank Hydraulikpumpe
NL8601931A (nl) * 1986-07-25 1988-02-16 Rotterdamsche Droogdok Mij Vrije-zuigermotor met een hydraulische of pneumatische energieoverdracht.
DE69329459T2 (de) * 1992-05-29 2001-01-18 Nat Power Plc Gaskompressor
GB9211405D0 (en) 1992-05-29 1992-07-15 Nat Power Plc A compressor for supplying compressed gas
US5464331A (en) * 1993-11-09 1995-11-07 Sawyer; James K. Engine and power output
US5911564A (en) * 1993-11-09 1999-06-15 Sawyer; James K. Control system for multiple engines
NL1001939C2 (en) * 1995-04-10 1996-10-11 Potma Beheer B V T Device for generating fast movement for controlling free piston aggregate in particular
NL1000479C2 (en) * 1995-06-01 1996-12-03 Potma Beheer B V T Device for generating fast movement for controlling free piston aggregate in particular
DE19613080C1 (de) * 1996-04-02 1997-01-23 Waldemar Reimann Pumpe für Flüssigkeiten
US6035637A (en) 1997-07-01 2000-03-14 Sunpower, Inc. Free-piston internal combustion engine
US6170442B1 (en) 1997-07-01 2001-01-09 Sunpower, Inc. Free piston internal combustion engine
US5775273A (en) * 1997-07-01 1998-07-07 Sunpower, Inc. Free piston internal combustion engine
US6293231B1 (en) 1999-09-29 2001-09-25 Ingo Valentin Free-piston internal combustion engine
WO2001088352A1 (de) 2000-05-19 2001-11-22 Mannesmann Rexroth Ag Freikolbenmotor
US6582204B2 (en) * 2001-09-06 2003-06-24 The United States Of America As Represented By The Administrator Of The U.S. Enviromental Protection Agency Fully-controlled, free-piston engine
US6694930B2 (en) * 2001-10-04 2004-02-24 Caterpillar Inc Piston assembly for use in a free piston internal combustion engine
JP4138669B2 (ja) 2002-03-15 2008-08-27 アドバンスド プロパルジョン テクノロジーズ インク 内燃機関に駆動される電力セル
US7728446B2 (en) 2003-06-25 2010-06-01 Advanced Propulsion Technologies, Inc. Ring generator
EP1639243B1 (de) 2003-06-25 2016-04-27 Peter Hofbauer Verbrennungsmotor
US7373870B2 (en) * 2005-04-20 2008-05-20 Grigoriy Epshteyn Universal hybrid engine, compressor and pump, and method of operation
GB2437742B (en) * 2006-05-02 2011-03-09 Boc Group Plc Free piston engine
US7757800B2 (en) * 2006-12-12 2010-07-20 Grigoriy Epshteyn Monocylindrical hybrid powertrain and method of operation
US8206129B2 (en) * 2008-07-27 2012-06-26 Sanderson Robert A Supercharged internal combustion engine including a pressurized fluid outlet
US10690126B2 (en) * 2018-08-01 2020-06-23 KISS-Engineering Inc. Dual engine-compressor system

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2472934A (en) * 1943-06-01 1949-06-14 Alan Muntz & Co Ltd Control means for internal-combustion-operated free-piston machines
US2943610A (en) * 1958-06-30 1960-07-05 Berry W Foster Free piston compressed gas generator
US3046958A (en) * 1959-06-10 1962-07-31 Bard Internal combustion device
FR1256066A (fr) * 1960-02-03 1961-03-17 Renault Commande de démarrage et d'arrêt d'une machine à pistons libres
CH400777A (de) * 1960-08-12 1965-10-15 Breinlich Richard Dr Pumpvorrichtung mit Brennkraftantrieb zur Förderung eines hydraulischen Fluidums
FR1582781A (de) * 1968-01-12 1969-10-10
NL160632C (nl) * 1968-10-08 1979-11-15 Ir Theodorus Gerhardus Potma Vrije-zuigerpompinstallatie.
FR1601500A (de) * 1968-12-19 1970-08-24
CH536936A (de) * 1971-04-26 1973-05-15 Sulzer Ag Kolbenbrennkraftmaschine mit hydrostatischem Triebwerk
BE791230A (fr) * 1971-11-12 1973-03-01 Braun Anton Dispositif d'alimentation en melange combustible d'un moteur a combustion interne
US3819298A (en) * 1972-10-02 1974-06-25 A Goldberg Chemical injection system
SE395850B (sv) * 1975-04-24 1977-08-29 Atlas Copco Ab Smorjanordning for borrigg
DE2722869A1 (de) * 1977-05-20 1978-11-23 Messerschmitt Boelkow Blohm Fluessigkeitspulskanone
US4435133A (en) * 1977-10-17 1984-03-06 Pneumo Corporation Free piston engine pump with energy rate smoothing
US4205638A (en) * 1977-11-18 1980-06-03 Giovanni Vlacancinch Fluid power supply system
US4326380A (en) * 1980-01-09 1982-04-27 Rittmaster Peter A Hydraulic engine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6863507B1 (en) 1999-11-24 2005-03-08 Mannesmann Rexroth Ag Generic free-piston engine with transformer valve assembly for reducing throttling losses

Also Published As

Publication number Publication date
FR2488344B1 (fr) 1985-12-27
JPS5752685A (en) 1982-03-29
EP0045472A1 (de) 1982-02-10
ES504537A0 (es) 1982-08-16
ES8206770A1 (es) 1982-08-16
US4415313A (en) 1983-11-15
DE3173974D1 (en) 1986-04-10
FR2488344A1 (fr) 1982-02-12

Similar Documents

Publication Publication Date Title
EP0045472B1 (de) Hydraulikgenerator mit einer Freikolbenmaschine
BE1001486A3 (fr) Procede et dispositif d'injection de carburant pour moteurs a combustion interne.
CA1325578C (fr) Groupe motopropulseur a accumulateur elastique d'elasticite variable et vehicule comportant un tel groupe
CA2692703C (fr) Centrale hydraulique pour moteur a taux de compression variable
WO2002029216A1 (fr) Dispositif d'actionnement de soupapes, et procede de commande pour un tel dispositif
FR2779481A1 (fr) Moteur a combustion a pistons a commande de renversement de marche
FR2466650A1 (fr) Dispositif de commande actionne par pression
FR2529950A1 (fr) Appareil de refroidissement de l'air de combustion de moteurs a combustion interne
FR2618849A1 (fr) Pompe d'injection de carburant pour moteurs a combustion interne notamment pour moteurs diesel a reglage hydraulique a accumulateur de carburant
FR2771454A1 (fr) Injection electronique de carburant a fonctionnement silencieux
US4593669A (en) Injection timing control device for distributor-type fuel injection pumps
FR2624911A1 (fr) Dispositif d'actionnement pour soupape de moteur
EP0691472A1 (de) Brennkraftmaschine mit Druckbehälter für spezifische Anwendungen
FR2851633A1 (fr) Actionneur electromecanique de soupape equipee d'un systeme amortisseur
FR2711736A1 (fr) Dispositif d'injection de combustible liquide pour moteur Diesel.
KR0163954B1 (ko) 디이젤 엔진의 거버너 장치
FR2545771A1 (fr) Systeme de freinage a dispositif antiblocage pour moyen de transport
CH642012A5 (fr) Dispositif limiteur de vitesse d'un vehicule automobile, notamment d'un camion.
FR1449708A (fr) Engin moteur à pistons libres
FR2538043A1 (fr) Generateur hydraulique a moteurs thermiques a pistons libres
EP1751421A1 (de) Pumpendüse
EP0333960A1 (de) Hydraulische Arretierungsvorrichtung für einen thermo-hydraulischen Generator
FR2501297A1 (fr) Moteur comportant une turbine pelton alimentee par un generateur diesel a pistons libres
FR2713717A1 (fr) Pompe à actionnement électromagnétique à collision élastique de l'équipage mobile.
FR3054001A1 (fr) Systeme de commande hydraulique de soupapes pour moteur a combustion interne avec recuperation d'energie maximale

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE GB IT NL SE

RBV Designated contracting states (corrected)

Designated state(s): BE DE GB IT NL SE

17P Request for examination filed

Effective date: 19820318

ITF It: translation for a ep patent filed

Owner name: BUGNION S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): BE DE GB IT NL SE

REF Corresponds to:

Ref document number: 3173974

Country of ref document: DE

Date of ref document: 19860410

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19870731

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19880728

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19880729

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19880731

BERE Be: lapsed

Owner name: REGIE NATIONALE DES USINES RENAULT

Effective date: 19880731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19890201

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19890401

EUG Se: european patent has lapsed

Ref document number: 81105943.5

Effective date: 19890510