WO2017215818A1 - Pompe de refoulement pour combustibles cryogéniques et système de refoulement de combustible - Google Patents

Pompe de refoulement pour combustibles cryogéniques et système de refoulement de combustible Download PDF

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Publication number
WO2017215818A1
WO2017215818A1 PCT/EP2017/059639 EP2017059639W WO2017215818A1 WO 2017215818 A1 WO2017215818 A1 WO 2017215818A1 EP 2017059639 W EP2017059639 W EP 2017059639W WO 2017215818 A1 WO2017215818 A1 WO 2017215818A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
drive
piston
fuel
feed pump
Prior art date
Application number
PCT/EP2017/059639
Other languages
German (de)
English (en)
Inventor
Andreas Kellner
Falko Bredow
Dirk SCHNITTGER
Andreas Beiter
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2017215818A1 publication Critical patent/WO2017215818A1/fr

Links

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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • 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
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/06—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure
    • F04B15/08—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts for liquids near their boiling point, e.g. under subnormal pressure the liquids having low boiling points
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/05—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by internal-combustion engines
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/02—Packing the free space between cylinders and pistons
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/142—Intermediate liquid-piston between a driving piston and a driven piston
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/144—Adaptation of piston-rods
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1172—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels

Definitions

  • the invention relates to a feed pump for cryogenic fuels according to the preamble of claim 1. Furthermore, the invention relates to a
  • a feed pump for cryogenic fuels according to the preamble of claim 1 is known from EP 2 541 062 A1.
  • the known feed pump is the
  • Feed pump arranged, reciprocating piston acts.
  • a check valve is arranged on the pressure-side outlet of the pump chamber of the feed pump, which ensures that the funded via the output or the pressure port in the direction of the heater at each stroke by the piston fuel can not then flow back into the pump chamber.
  • the known delivery pump is at a constant
  • the delivery rate of the delivery pump depends on the rotational speed of the internal combustion engine.
  • there are operating conditions that require a relatively low fuel consumption despite relatively high engine speed for example when
  • the feed pump for cryogenic fuels with the features of claim 1 has the advantage that in a relatively simple manner the delivery rate of the feed pump to the actual fuel demand even with a rigid coupling of the feed pump, especially if the feed pump is connected to an internal combustion engine , can be adjusted. Under a rigid coupling is understood that a variable speed of the drive in a possibly with the interposition of a reduction gear
  • the invention is based on the idea, the pump element or the
  • the invention provides that the pump element via a filled with a pressure medium
  • Coupler space in operative connection with the drive (internal combustion engine) is connected, and that the coupler chamber via a valve with a
  • Buffer memory for the pressure medium is connected, wherein the valve for controlling the flow of pressure medium between the coupler space and the
  • Buffer memory is formed. Such a construction according to the invention makes it possible, with an open valve to the buffer memory, a back and forth promotion of the pressure medium between the coupler space and the
  • a suitable pressure medium is particularly intended to a hydraulic medium, in particular oil. This has the advantage that the medium used can simultaneously serve for the lubrication of components of the feed pump.
  • Longitudinal axis of the pump chamber reciprocally trained piston is that a connected to the piston piston plunger protrudes with an end region facing away from the piston in the coupler space, and that the drive is connected to a drive plunger, which faces away from the drive end portion protrudes into the coupler space.
  • piston tappet and the drive tappet In order to position both the piston tappet and the drive tappet in a defined initial position, for example, when the coupler space is depressurized and, moreover, to assist the suction movement of the piston element, it is provided that the piston tappet and the drive tappet each have a spring element in a direction away from the coupler space
  • the coupler space are arranged together with the piston plunger and the drive plunger in a common housing. This makes it possible to use the feed pump in particular using a
  • Pre-feed pump in a relatively distant from the tank container area to be able to order. Furthermore, a particularly compact construction of the feed pump is made possible.
  • the particularly compact construction of such a feed pump is favored when the piston tappet, the drive tappet and the piston are arranged along two aligned longitudinal axes, and when the piston tappet and the drive tappet protrude from opposite sides into the coupler space.
  • the coupler space consists of two sub-coupler spaces in
  • the invention also includes a fuel delivery system for a gas powered vehicle using a delivery pump heretofore described in accordance with a first basic configuration of the coupler space in a single housing.
  • the fuel delivery system is characterized in that the feed pump is preceded by a prefeed pump, which compresses the fuel at the suction port of the feed pump to a prefeed pressure at which the fuel is not yet evaporated.
  • Fuel feed system has the advantage that the (high-pressure) feed pump according to the invention can be arranged in a region relatively far away from the tank container, for example at an interface on the internal combustion engine for driving the feed pump. In addition, this is a transmission of the heat of the drive of the feed pump in the fuel in the
  • Tank container reduced.
  • the prefeed pump is disposed within the tank.
  • Such an arrangement is so far as regards the heat transfer of the drive of the prefeed pump possibly uncritical or advantageous, since the power requirement of the pre-feed pump, in relation to the (high-pressure) feed pump, is relatively low.
  • the drive of the feed pump via a mechanical coupling with an internal combustion engine, wherein the coupling is also a
  • Translation gear with constant gear ratio may have, for example, the speed of a crankshaft better to one for the
  • Fig. 1 is a system view of a fuel delivery system, in which one of
  • Power transmission is arranged on a piston serving coupler space in a feed pump and
  • FIG. 2 shows a fuel delivery system in which the two-part coupler space is provided in different areas of the fuel delivery system, wherein the two Operakopplersammlung are connected to each other via a hydraulic line.
  • a fuel delivery system 100 for cryogenic fuel 1 is shown.
  • the fuel 1 is, and is not limited to, natural gas which is cooled down in a tank container 2 to a temperature of, for example, -10 ° C. or less so that it is below a filling level 3 in liquid form.
  • the fuel 1 is in a gaseous state.
  • the tank container 2 preferably consists of a fuel tank 1 receiving the inner tank, which is enclosed by an outer shell to form an evacuated gap. Since such a tank container 2 known from the prior art per se and is not essential to the invention, is omitted at this point to a more detailed description of the tank 2.
  • a low-pressure delivery pump 4 is arranged within the tank container 2 as a prefetching pump, preferably below the filling level 3. Also, the drive 5 of the low pressure pump 4 is disposed within the tank 2. On the pressure side of the low-pressure pump 4 are a
  • shut-off valve 6 and a pressure relief valve 7 is arranged.
  • the check valve 6 is closed in the de-energized state, wherein the pressure relief valve 7 serves to damage the faulty shut-off valve 6
  • the pressure side of the low-pressure delivery pump 4 conveys the fuel 1 (in the case of an energized and thus open shut-off valve 6) into a supply line 8 which is connected to the suction side of a (high-pressure) delivery pump 10.
  • Pressure side of the feed pump 10 is in turn connected via a pressure line 9 with a heater 15.
  • the heating device 15, which is designed in particular in the form of a heat exchanger, has a heating element, not shown in detail, which is designed to heat the liquid fuel 1 conveyed by the feed pump 10 and via a further line 16 with the interposition of a buffer 14 and a pressure regulating valve 19 a storage volume, in particular a rail 17, supply. From the rail 17 turn lines 18, which are each connected to a gas valve 20.
  • the gas valves 20 are each a not shown
  • Combined combustion chamber of an internal combustion engine of a motor vehicle serve to the gaseous fuel 1, for example, under a
  • the feed pump 10 has a housing 21, the example of two, on a
  • Front side axially interconnected housing parts 22, 23 has.
  • a longitudinal bore 24 is formed with sections with different bore diameters as a through hole.
  • the longitudinal bore 24 forms in the section in which it has its largest diameter, a cylindrically shaped pump chamber 25.
  • the high-pressure pump piston 28 acts as a compressor or pump element 29, which is designed to compress the fuel 1 flowing into the feed pump 10 from a suction-side feed pressure of, for example, up to 60 bar, prevailing on account of the low-pressure feed pump 4 to a system pressure of a few 100 bars and the heating device 15 feed.
  • the suction inlet 32 has a portion 34 of the longitudinal bore 24 connection with a surrounding the first housing part 22 storage space 35 for the fuel 1, which is filled via the suction side of the feed pump 10 from the supply line 8 with fuel 1.
  • a check valve is arranged, which allows only an inflow of fuel 1 into the pump chamber 25, but not an outflow of fuel 1 via the suction inlet 32 into the storage space 35th
  • a transverse bore 36 is formed, the connection with the storage space 35 has, and the inflow and outflow of fuel 1 in the suction inlet 32 and the pressure outlet 33 opposite side of the pump chamber 25 allows. Furthermore, in the first housing part 22, a high pressure line 37 is formed, which connects the pressure outlet 33 with the pressure line 9. In the area of
  • Pressure outlet 33 is also arranged in detail, also not shown in detail, high-pressure valve, on the one hand prevents backflow of fuel 1 from the high pressure line 37 into the pump chamber 25, and on the other hand, a spill of fuel 1 from the pump chamber 25 into the high-pressure line 37 allows.
  • the high pressure valve is thus designed as a check valve.
  • the high-pressure valve opens only at a certain overpressure in the pump chamber 25 in the direction of the high-pressure line 37.
  • the pump element 29 or the high-pressure pump piston 28 is connected to a side facing away from the portion 31 of the pump chamber 25 with a piston rod 39.
  • the piston rod 39 protrudes from the second housing part 23 facing out end of the first housing part 22 and is connected on the side remote from the pump element 29 side with a piston plunger 40.
  • the piston plunger 40 projects into a section of a bore formed as a blind hole 41 in the second housing part 23 bore.
  • Piston plunger 40 from a compression spring 43, whose the piston plunger 40th
  • the piston rod 39 facing away from the end of the piston rod 40 protrudes into an end face in a portion of the blind hole 41 into it, the one
  • Coupler space 45 forms, wherein a longitudinal axis 46 of the blind hole 41 is aligned with the longitudinal bore 24 on the first housing part 22.
  • a further compression spring 55 is supported between a collar 54 of the drive plunger 50 and an end-side boundary of the section 51, which forces the drive plunger 50 in a direction away from the first housing part 22 direction.
  • the drive ram 50 in the direction of the double arrow 58 transmitted.
  • An outstanding from the second housing part 23 end of the camshaft 53 is connected by way of example with a fixed gear ratio having transmission 60.
  • the transmission 60 is in turn connected via a mechanical coupling 61 to a drive 65 of the feed pump 10.
  • the drive 65 is, in particular, the internal combustion engine or its crankshaft or a device for decoupling a drive (power take-off) connected to the internal combustion engine.
  • the coupler chamber 45 is connected via a transverse bore 66, an electrically actuated switching valve 68 for adjusting the stroke of the piston plunger 40 and a
  • Switching valve 68 bridging bypass line 69 with integrated
  • the Motorolpumpe 77 delivers engine oil, which serves as a pressure medium 47 in the coupler space 45 and at the same time the lubrication of components, in particular the drive plunger 50 and the piston plunger 40. In particular, can be compensated with the Motorolpumpe 77 and leakage losses. Furthermore, the portion 51 in the blind hole 41 and the spring chamber 78 of the buffer memory 75 are connected to an oil tank 79, from which the motor oil pump 77 sucks the pressure medium 47. About another line 81 which has 53 different areas of the blind hole 41 and the camshaft connection is from these areas
  • Bypass line 69 locks. This causes the piston rod 40, and thus also the piston rod 39 and the high-pressure pump piston 28, to move in the same direction as the drive rod 50
  • High pressure pump piston 28 causes due to previously sucked into the pump chamber 25 fuel 1, that the fuel 1 is compressed in the pump chamber 25 and conveyed through the high pressure line 37 to the heater 15.
  • locked switching valve 68 is thus the maximum
  • Movement of the drive plunger 50 in the direction of the camshaft 53 flows the previously pumped into the buffer memory 45 pressure fluid 47 or oil via the bypass line 69 and / or not switched switching valve 68 in the
  • Flow rate of fuel 1 from the pump chamber 25 are adjusted as needed.
  • the switching valve 68 is de-energized in its blocking position, while in the energized state allows a flow of pressure medium 47 from the coupler chamber 45 in the direction of the buffer space 75.
  • the fuel delivery system 100a shown in FIG. 2 does not have a low-pressure delivery pump 4 in contrast to the fuel delivery system 100. Rather, the (high-pressure) delivery pump 10a protrudes with its suction side into the tank container 2a.
  • the first housing part 22a has via the longitudinal bore 34a and the transverse bore 36 directly connected to the fuel 1 in the
  • Tank container 2a In the second housing part 23 a is in a as
  • High-pressure pump piston 28 side facing away from a first Operakopplerraum 83 is formed, which has a hydraulic line 84 connection with a second Operakopplerraum 85, which is arranged in a separate housing part 86.
  • the two Operakopplersammlung 83 and 85 thus form together with the
  • Hydraulic line 84 from the coupler chamber 45a.
  • the further housing part 86 serves in particular for receiving the drive ram 50a. This makes it possible, the further housing part 86 and the drive 65 in one of the
  • delivery pump 10 a and its housing parts 22 a, 23 a relatively widely spaced area.
  • Tank container 2 a close range, but outside the tank 2a to arrange, and to lead a suction line of the feed pump 10 a in the tank container 2 a.
  • Feed pump 10, 10a can be modified or modified in many ways, without departing from the spirit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention concerne une pompe de refoulement (10 ; 10a) pour combustibles cryogéniques (1), comprenant une entrée d'aspiration (32) qui peut être reliée au moins indirectement à un réservoir (2 ; 2a) pour le combustible (1), une sortie de pression (33) qui peut être reliée de préférence à un évaporateur (15), et un élément compresseur (29) qui peut être actionné par un entraînement (65) pour la compression du combustible (1) dans une chambre (25) de compresseur.
PCT/EP2017/059639 2016-06-16 2017-04-24 Pompe de refoulement pour combustibles cryogéniques et système de refoulement de combustible WO2017215818A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016210728.3 2016-06-16
DE102016210728.3A DE102016210728A1 (de) 2016-06-16 2016-06-16 Förderpumpe für kryogene Kraftstoffe und Kraftstofffördersystem

Publications (1)

Publication Number Publication Date
WO2017215818A1 true WO2017215818A1 (fr) 2017-12-21

Family

ID=58609421

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/059639 WO2017215818A1 (fr) 2016-06-16 2017-04-24 Pompe de refoulement pour combustibles cryogéniques et système de refoulement de combustible

Country Status (2)

Country Link
DE (1) DE102016210728A1 (fr)
WO (1) WO2017215818A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016220840A1 (de) 2016-10-24 2018-04-26 Robert Bosch Gmbh Förderpumpe, insbesondere für kryogene Kraftstoffe
DE102020116294A1 (de) * 2020-06-19 2021-12-23 Hauhinco Maschinenfabrik G. Hausherr, Jochums Gmbh & Co. Kg Hubkolbenpumpe zum Fördern eines Mediums

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148981A (en) * 1979-05-08 1980-11-19 Sugino Mach:Kk Pressure and capacity variable reciprocating pump
DE2946529A1 (de) * 1979-11-17 1981-05-27 Frieseke & Hoepfner Gmbh, 8520 Erlangen Druckgeregelte mehrzylinder-kolbenpumpe
US4443160A (en) * 1980-11-13 1984-04-17 Brueninghaus Hydraulik Gmbh High-pressure piston pump for liquids, preferably for water
US4472946A (en) * 1983-01-28 1984-09-25 Zwick Eugene B Cryogenic storage tank with built-in pump
US7293418B2 (en) * 2001-11-30 2007-11-13 Westport Power Inc. Method and apparatus for delivering a high pressure gas from a cryogenic storage tank
EP2541062A1 (fr) 2011-06-29 2013-01-02 Westport Power Inc. Pompe cryogène

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55148981A (en) * 1979-05-08 1980-11-19 Sugino Mach:Kk Pressure and capacity variable reciprocating pump
DE2946529A1 (de) * 1979-11-17 1981-05-27 Frieseke & Hoepfner Gmbh, 8520 Erlangen Druckgeregelte mehrzylinder-kolbenpumpe
US4443160A (en) * 1980-11-13 1984-04-17 Brueninghaus Hydraulik Gmbh High-pressure piston pump for liquids, preferably for water
US4472946A (en) * 1983-01-28 1984-09-25 Zwick Eugene B Cryogenic storage tank with built-in pump
US7293418B2 (en) * 2001-11-30 2007-11-13 Westport Power Inc. Method and apparatus for delivering a high pressure gas from a cryogenic storage tank
EP2541062A1 (fr) 2011-06-29 2013-01-02 Westport Power Inc. Pompe cryogène

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