US3363609A - Liquid fuel injection devices for free piston internal combustion engines - Google Patents

Liquid fuel injection devices for free piston internal combustion engines Download PDF

Info

Publication number
US3363609A
US3363609A US635044A US63504467A US3363609A US 3363609 A US3363609 A US 3363609A US 635044 A US635044 A US 635044A US 63504467 A US63504467 A US 63504467A US 3363609 A US3363609 A US 3363609A
Authority
US
United States
Prior art keywords
piston
cylinder
bore
fuel
space
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 - Lifetime
Application number
US635044A
Other languages
English (en)
Inventor
Cadiou Jean
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.)
Automobiles Citroen SA
Original Assignee
Andre Citroen SA
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 Andre Citroen SA filed Critical Andre Citroen SA
Application granted granted Critical
Publication of US3363609A publication Critical patent/US3363609A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/20—Varying fuel delivery in quantity or timing
    • F02M59/32—Varying fuel delivery in quantity or timing fuel delivery being controlled by means of fuel-displaced auxiliary pistons, which effect injection
    • 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
    • F01B11/08—Reciprocating-piston machines or engines without rotary main shaft, e.g. of free-piston type with direct fluid transmission link
    • 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
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M49/00—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston
    • F02M49/04—Fuel-injection apparatus in which injection pumps are driven or injectors are actuated, by the pressure in engine working cylinders, or by impact of engine working piston using the piston impact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M57/00—Fuel-injectors combined or associated with other devices
    • F02M57/02—Injectors structurally combined with fuel-injection pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2700/00—Supplying, feeding or preparing air, fuel, fuel air mixtures or auxiliary fluids for a combustion engine; Use of exhaust gas; Compressors for piston engines
    • F02M2700/07—Nozzles and injectors with controllable fuel supply
    • F02M2700/078—Injectors combined with fuel injection pump

Definitions

  • a cylinder constantly full of liquid is connected with a fixed bore having an inner diameter equal to the outer diameter of the end of a plunger rigid with the engine piston. This bore is disposed in such manner that the end of said plunger penetrates thereinto near the end of the compression stroke of the piston.
  • auxiliary piston is disposed in an auxiliary cylinder so as to divide the latter into a space connected with the above mentioned bore and a space connected, on the one hand, with a fuel inlet conduit provided with a check valve and, on the other hand, with a fuel injection orifice opening into the internal combustion engine cylinder.
  • the present invention relates to liquid fuel injection devices for free piston internal combustion engines of the type Working by injection of liquid fuel.
  • the invention is more especially, but not exclusively, concerned with engines having a piston rigid, at one longitudinal end thereof, with a piston or plunger of a pump for the hydraulic transmission of power.
  • the object of the present invention is to provide a device of this kind which is better adapted to meet the requirements of practice than those known at the present time and in particular which is of simpler construction and capable of supplying a high injection pressure, the beginning of injection being adjusted with accuracy and the end of injection being possibly made variable in accordance with the load of the engine.
  • the invention is concerned with feed devices of this kind wherein the engine piston carries a plunger rod extending with a iluidtight fit through the cylinder head of the internal combustion engine so as to project into a chamber full of liquid.
  • this chamber communicates with a blind bore of a diameter equal (with the approximation corresponding to a sliding fit) to the external diameter of the end of said rod and disposed in such manner that said rod end enters said bore near the end of the piston compression stroke (before the external dead center position) and in dividing an auxiliary cylinder by means of an auxiliary piston into two spaces, to with a first space connected with said blind bore and a second space connected, on the one hand, with a fuel feed conduit provided with a check valve and, on the other hand, with an injection orifice, whereby the liquid moved by the penetration of the end of the rod into the blind bore moves the auxiliary piston in the direction producing injection of fuel.
  • auxiliary piston is of stepped construction with a portion of large cross section in the first space (control liquid) and a portion of small cross section in the second space (fuel), whereby the injection pressure is increased with respect to the pressure of the control liquid in a ratio equal to that of said cross sections.
  • FIG. 1 is a diagrammatic axial section view of a free piston engine fed with fuel by means of a device according to this invention
  • 3,363,609 Patented Jan. 16, 15258 'FIG. 2 shows, similarly to FIG. 1 and on an enlarged scale, an injection device according to the present invention as applied to the engine of FIG. 1;
  • FIG. 3 shows, on a smaller scale, the outline of the engine of FIG. 1 with the external elements of a regulation system combined with two fuel injection devices such as shown by FIG. 2.
  • a hydraulic generator or pump preferably, as shown, with two opposed groups comprising each a cylinder 1 and a hollow rod or plunger 2, each group including a suction valve 3 and a delivery valve 4;
  • a receiver B (or hydraulic motor) fed from the generator, to the delivery of which it is connected through pipes 5, the delivery of said receiver B being connected through pipes 6 with the suction of said generator, receiver B being coupled with the wheels (not shown) of the vehicle;
  • a storing chamber E connected with each cylinder 1 between valves 3 and 4 to receive a variable amount of the liquid delivered on every cycle of the engine from said cylinder 1 so as to vary the ratio of transmission between engine A and receiver B.
  • FIG. 1 The upper half of FIG. 1 is shown in section by a first axial plane so as to show the respective damping chambers C and D of the two groups whereas the lower half of FIG. 1 is shown, on the left of FIG. 1, in section by a second axial plane making an angle of 60 with said first axial plane on one side thereof so as to show a storing chamber E, and, on the right of FIG. 1, in section by a third axial plane making an angle of 60 with said first axial plane on the other side thereof, so as to show a damping chamber C.
  • Engine A is of the double action type and provided with a single free piston 7 slidable in a cylinder 8 having two cylinder heads 9. Said piston 7 carries, at each end thereof, a rod 2 extending in a fluidtight fashion through the correspondin cylinder head 9.
  • the hydraulic pump cylinders 1 are formed in blocks 10 rigid with cylinder heads 9.
  • the air inlet conduits of the internal combustion engine are designated by 11 and the exhaust conduits by 12, the corresponding ports being controlled by piston 7.
  • the inlet and outlet ports may be constituted by the same openings 13 divided by movable annular partitions 14.
  • piston '7 at each end thereof, there is formed an approximately spherical chamber 17 located close to the end of plunger 2.
  • Each of said spherical chambers 17 communicates with the corresponding space 15 through orifices or passages 18 which permit successively the air imprisoned in space -15 to enter with a high velocity into said chamber 17 at the end of the compression stroke and the flame resulting from combustion to flow into said space 15 when the pressure has increased in chamber 17.
  • an injection needle 19 (FIG. 2) adapted to be moved away from its seat to open an injection orifice 20 under the effect of the fuel pressure created through means which will be hereinafter described.
  • Such an internal combustion engine works as follows.
  • piston 7 When piston 7 is getting close to the end of its stroke toward the right (FIGS. 1 and 2), the air compressed in chamber 15 enters chamber 17 through passages 13 with a high velocity.
  • the pressure of the ignited fuel mixture reaches a sufficient value, the flame is projected into space 15 where fuel combustion is completed. This operation takes place repeatedly on every dead center position of the piston.
  • Piston 7 carries, on either side thereof, a hollow plunger 2 passing with a fiuidtight fit through the correspond ing cylinder head 9 to extend into a cylinder 1 constantly full of liquid.
  • plunger 2 is not near the end of its outward stroke, its cylinder 1 is in communication with a bore 21 having a diameter practically equal to the external diameter of the end 22 of said plunger 2 and disposed in such manner that said end 22 penetrates into said bore 21 at the end of the outward stroke of plunger 2.
  • an auxiliary piston 23 is mounted slidable in a stationary auxiliary cylinder, in line with cylinder 1, and divided by said auxiliary piston 23 into spaces 24 and 25.
  • Space 24 is connected with bore 21 whereas space 25 is connected, on the one hand, with a fuel inlet conduit 26 provided with a check valve 2-7 and, on the other hand, with injection orifice 20.
  • auxiliary piston 23 comprises a portion 23:: of larger cross section, located in space 24 (control liquid) and a portion 23b of smaller cross section located in the second space 25 (fuel).
  • Both the end 22 of plunger 2 and bore 21 are annular and surround injection conduit 16. Bore 21 is provided in a piece 28 fixed with respect to block 10. Said end 22 is of an outer diameter smaller than that of the remainder of plunger 2 for reasons hereinafter stated.
  • Auxiliary piston 23 is located in a block 29 sccurcd in piece 23 by means of a hollow screw 36.
  • This block 24 is provided with two bores 31 and 32 in line with each other and accommodating portions 23a and 23b of piston 23 respectively.
  • Bore 21 is connected with space 24 through channels 33 and 34 formed in piece 28 and block 29, respectively.
  • a passage 35 extending from space 24-, limited by one of the sides of the portion 23a of piston 23, to the portion of bore 31 on the other side of said piston portion 23a. This passage 35 is cleared at the end of said displacement of auxiliary piston 23 by the edge of portion 23a located in space 24 (position shown by FIG. 2).
  • auxiliary piston 23 The return stroke of auxiliary piston 23 is produced both by the pressure of the fuel fed through conduit 26 into space 25 and by a spring 36 housed in screw 30 and acting upon an extension 37 of piston 23 through a ring 38 secured to said extension.
  • This return stroke is limited by an abutment 39 adjustable in accordance with the load, as it will be hereinafter explained.
  • a spring 4% bearing on one side upon the edge of the fixed injection conduit 16, and on the other side upon an abutment 41 rigid with needle 19, causes injection orifice 20 to be closed. As shown by FIG.
  • space 25 belongs to a chamber 42 provided in block 29 at the end of bore 32 and containing spring 40 and abutment 41, this chamber 42 communicating with conduit 26 through slots 43 provided at the end of con duit 16 and a groove 44 provided in piece 28 at the outlet of conduit 26.
  • Means responsive to the overpressure that may occur in said blind bore as a result of the penetration thereinto of the rod at the end of a stroke thereof control the abutment 39 provided on the other side of the engine so as to reduce the return stroke of the piston cooperating with this last mentioned abutment.
  • the portion of plunger 2 immediately adjacent to the end 22 of smaller diameter thereof cooperates with a blind bore 45 formed in piece 23 and in line with bore 21, said bore 45 communicating with cylinder 1 as long as plunger 2 is not moving outwardly beyond a normal outer position.
  • the means responsive to overpressure in bore 45 they include a piston 46 moving in a cylinder 47 which is connected on one side of said piston 46 with bore 45 through a channel 48, whereas the portion of cylinder d7 on the other side of piston 46 is connected directly with cylinder 1 through a channel 49.
  • the rod 50 of piston 46 extends through the frame of the device.
  • Advantageously channel 48 communicates with passage 35.
  • FIG. 3 shows the means for connecting the rod 56 of piston 46 on the right hand side of engine A with the abutment 39 on the left hand side of said engine.
  • the rod of piston Sila (on the left) is linked wit-h a lever 51a pivotable about an axis 52a and connected, beyond the point where it is pivoted to rod Stla, with a link 53a.
  • This last mentioned link is pivotally connected with one end of a lever 54a pivotable about an intermediate axis 55a, the other end of said lever 54a carrying abutment 39a.
  • the displacements of the various elements of link systems 51a, 55a, 55a that correspond to too great a displacement of piston 7 and to a reduction of the fuel injected during the next stroke have been indicated by arrows in FIG. 3.
  • Any other link system capable of moving the abutment 39 for the extension 37 of auxiliary piston 23 when there is an overpressure in bore 45 might be used.
  • the link system associated with piston rod Sill) is symmetrical with respect to that associated with piston rod 50a and need not be described.
  • plunger 2 penetrates into bore 45 and delivers liquid through channel 48 to the right hand face of piston 46, which moves rod toward the center of the engine, into a position from which its return stroke is braked by a calibrated orifice provided in channel 49, as indicated in the above mentioned French Patent No. 1,428,516. It follows that the abutment 39 located on the other side of the internal combustion engine is also moved toward the center of said engine, which reduces the return stroke of piston 23 and, consequently, the amount of fuel injected on the next stroke.
  • Injection device 19 might be disposed in a position where it is not coaxial with plunger 2 but would open into any part of cylinder head 9. In this case space should be connected to the body of the injecting means through suitable pipes.
  • a fuel feed device which comprises, in combination,
  • said fixed structure being provided with a bore in communication with said chamber and arranged for slidably accommodating the free end of said rod at the end of the outward stroke thereof, said bore being arranged so that said free end of said rod cuts off the communication between said chamber and said bore when said piston is near its outer dead center position,
  • auxiliary piston slidable in said auxiliary cylinder for dividing it into two spaces, a first one and a second one,
  • said fixed structure being provided with a fuel feed conduit opening at the downstream end thereof into said second space
  • a fuel inlet valve movable in said fixed structure adapted to connect said second space with the inside of said engine cylinder in response to a given rise of pressure in said second space
  • conduit means extending between said bore and said auxiliary cylinder first space so that the liquid compressed in said bore by the free end of said rod at the end of the outer stroke thereof pushes said auxiliary piston in the direction which causes fuel to be delivered through said fuel inlet valve.
  • auxiliary piston is made of two portions of different respective diameters cooperating with corresponding po-rtions, of different respective diameters, of said auxiliary cylinder forming said two chambers respectively, the first chamber being of greater diameter than the second chamber, whereby the fuel injection pressure is correspondingly increased with respect to the liquid pressure in said bore.
  • a power plant which comprises,
  • an internal combustion engine including on the one hand a cylinder fixed with respect to said structure and having a cylinder head at one end thereof, and, on the other hand a freely movable piston slidable in said cylinder,
  • a hydraulic pump including a cylinder formed in said fixed structure and full of liquid and a piston adapted to cooperate with said pump cylinder, said pump piston being rigid with said engine piston coaxially thereto and slidable in a fiuidtight manner through said cylinder head,
  • said fixed structure being provided with a bore in communication with said cylinder and arranged for slidably accommodating the free end of said pump piston at the end of the outward stroke thereof, said bore being arranged so that said free end of said pump piston cuts off the communication between said cylinder and said bore when said engine piston is near its outer dead center position,
  • auxiliary piston slidable in said auxiliary cylinder for dividing it into two spaces, a first one and a second one,
  • said fixed structure being provided with a fuel feed conduit opening at the downstream end thereof into said second space
  • a fuel inlet valve movable in said fixed structure adapted to connect said second space with the inside of said engine cylinder in response to a given rise of pressure in said second space
  • conduit means extending between said bore and said auxiliary cylinder first space so that the liquid compressed in said bore by the free end of said pump piston free end at the end of the outer stroke thereof 7 pushes said auxiliary piston in the direction which causes it to deliver fuel through said fuel inlet valve, and
  • a power plant according to claim 3 including an injection conduit carried in fixed position by said fixed structure so that said pump piston is eoaxially sli-dable therein, said fuel inlet valve being provided at the end of said injection conduit.
  • auxiliary piston is made of two portions of different respective diameters cooperating with corresponding portions of different respective diameters of said auxiliary cylinder forming said two chambers respectively, the first chamber being of greater diameter than the second chamber, auxiliary piston carries on the side opposed to its portion of smaller cross section, a rod extending in a fluidtight manner through the end of the first space, whereby the pressure of the control liquid fed from the hydraulic pump or generator cylinder which is transmitted to both faces of the portion of greater cross section of the auxiliary piston pushes the latter in the direction that increases the pressure of the fuel filling the second space.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Fuel-Injection Apparatus (AREA)
US635044A 1966-05-09 1967-05-01 Liquid fuel injection devices for free piston internal combustion engines Expired - Lifetime US3363609A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR60769A FR1492914A (fr) 1966-05-09 1966-05-09 Perfectionnements apportés aux dispositifs d'injection de combustible liquide pour moteurs à piston libre

Publications (1)

Publication Number Publication Date
US3363609A true US3363609A (en) 1968-01-16

Family

ID=8608128

Family Applications (1)

Application Number Title Priority Date Filing Date
US635044A Expired - Lifetime US3363609A (en) 1966-05-09 1967-05-01 Liquid fuel injection devices for free piston internal combustion engines

Country Status (8)

Country Link
US (1) US3363609A (fr)
BE (1) BE698165A (fr)
DE (1) DE1576189A1 (fr)
ES (1) ES339938A1 (fr)
FR (1) FR1492914A (fr)
GB (1) GB1150392A (fr)
NL (1) NL6706479A (fr)
SE (1) SE307474B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841797A (en) * 1971-11-18 1974-10-15 W Fitzgerald Power units
US3918851A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald High velocity shaft seal
FR2487915A1 (fr) * 1980-08-01 1982-02-05 Stelzer Frank Moteur thermique a deux temps

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4031920A (en) * 1972-11-10 1977-06-28 Fitzgerald William Maurice Bar Pressurized hydraulic sump system
DE3342183A1 (de) * 1983-11-23 1985-05-30 Breinlich, Richard, Dr., 7120 Bietigheim-Bissingen Von fluid durchstroemte aggregate mit in zylindern hin- und herbewegten kolben, wie pumpen, motoren, verbrennungsmotoren und brennkraftmaschinen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274693A (en) * 1938-08-16 1942-03-03 Bosch Gmbh Robert Governor apparatus for the fuel delivery of diesel and other injection internal combustion engines
US2537371A (en) * 1943-02-04 1951-01-09 Petersen Ove Fuel injection arrangements in internal-combustion engines
US3106896A (en) * 1959-08-03 1963-10-15 Lely Nv C Van Der Fluid pumps
US3110152A (en) * 1961-05-01 1963-11-12 Int Harvester Co Starting and operating control system for free piston engine hydraulic pump as a power plant of a hydrostatic driven vehicle
FR1428516A (fr) * 1964-11-25 1966-02-18 Citroen Sa Andre Perfectionnements apportés aux dispositifs de régulation des moteurs à piston libre

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2274693A (en) * 1938-08-16 1942-03-03 Bosch Gmbh Robert Governor apparatus for the fuel delivery of diesel and other injection internal combustion engines
US2537371A (en) * 1943-02-04 1951-01-09 Petersen Ove Fuel injection arrangements in internal-combustion engines
US3106896A (en) * 1959-08-03 1963-10-15 Lely Nv C Van Der Fluid pumps
US3110152A (en) * 1961-05-01 1963-11-12 Int Harvester Co Starting and operating control system for free piston engine hydraulic pump as a power plant of a hydrostatic driven vehicle
FR1428516A (fr) * 1964-11-25 1966-02-18 Citroen Sa Andre Perfectionnements apportés aux dispositifs de régulation des moteurs à piston libre

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841797A (en) * 1971-11-18 1974-10-15 W Fitzgerald Power units
US3918851A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald High velocity shaft seal
FR2487915A1 (fr) * 1980-08-01 1982-02-05 Stelzer Frank Moteur thermique a deux temps

Also Published As

Publication number Publication date
DE1576189A1 (de) 1970-05-06
GB1150392A (en) 1969-04-30
SE307474B (fr) 1969-01-07
NL6706479A (fr) 1967-11-10
BE698165A (fr) 1967-10-16
ES339938A1 (es) 1968-06-16
FR1492914A (fr) 1967-08-25

Similar Documents

Publication Publication Date Title
US4170974A (en) High pressure fuel injection system
US2916028A (en) Fuel injection systems
US3358656A (en) Devices for starting a double action free piston engine having a single cylinder
US3332408A (en) Fuel injection apparatus for internal combustion engines
US2083680A (en) Internal combustion engine
US2462745A (en) Free piston machine provided with pneumatic starting means
US3363609A (en) Liquid fuel injection devices for free piston internal combustion engines
GB1261246A (en) Improvements in or relating to a fuel injection device for a compression-ignited internal combustion engine
US3329133A (en) Regulation devices for free piston internal combustion engines
US2053543A (en) Fuel pumping system for engines
US3627208A (en) Fuel injection apparatus for internal combustion engines of the liquid-fuelinjection compression-ignition type
US3267917A (en) Opposed cylinder variable piston stroke internal combustion engine
US4108383A (en) Fuel injection valve with stepped injection
US2055580A (en) Internal combustion engine
GB1474961A (en) Fuel nozzle assembly for a compression ignition internal combustion engine and a' engine incorporating such a fuel nozzle assembly
US3123061A (en) figure
US2132802A (en) Internal combustion engine
US3194007A (en) Free piston gas generators
US3593736A (en) Slug pump and pressurizing valve for fuel control system
US3092958A (en) Free piston engine
US2899798A (en) Igniter control
GB1187074A (en) Improvements in or relating to Fuel Injection Pumps for Internal Combustion Engines.
US3099219A (en) Self-regulating reciprocating piston pumps, in particular for the injection of fuel into internal combustion engines
US2943438A (en) Improvements in free piston engine and gas turbine power plant
US2494573A (en) Free piston compressor and control therefor