GB1332799A - Hydraulic power unit including a hydraulic pump operated by a free piston internal combustion engine - Google Patents

Hydraulic power unit including a hydraulic pump operated by a free piston internal combustion engine

Info

Publication number
GB1332799A
GB1332799A GB1332799DA GB1332799A GB 1332799 A GB1332799 A GB 1332799A GB 1332799D A GB1332799D A GB 1332799DA GB 1332799 A GB1332799 A GB 1332799A
Authority
GB
United Kingdom
Prior art keywords
pistons
liquid
engine
motor
combustion stroke
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
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.)
RIEKKINEN AS
Original Assignee
RIEKKINEN AS
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 RIEKKINEN AS filed Critical RIEKKINEN AS
Publication of GB1332799A publication Critical patent/GB1332799A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • 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
    • 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
    • F04B49/08—Regulating by delivery pressure
    • 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
    • F04B49/22—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 by means of valves
    • F04B49/24—Bypassing
    • F04B49/243—Bypassing by keeping open the inlet valve

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Reciprocating Pumps (AREA)

Abstract

1332799 I C Engine operated hydraulic pumps; liquid piston engines AS RIEKKINEN 12 Oct 1970 48397/70 Headings F1A and F1B An internal combustion engine operated pump unit comprises engine pistons 2 operating in opposed relation inside a common combustion cylinder 4, there being hydraulic pump pistons 15 integral with respective ones of pistons 2, the pistons 15 being reciprocable in respective pump cylinders 16. Liquid is supplied from the pump cylinders 16 to a motor 22, there being a solenoid operated valve 30 connected to each cylinder 16 which, in response to control unit 28 which receives information from a tachogenerator 26 about the velocity and/or position and/or acceleration of engine pistons, maintains valve 30 open for a part of the combustion stroke so that the hydraulic fluid is by-passed from the circuit to motor 22, the liquid going to reservoir 19. For the rest of the combustion stroke valve 30 is closed so that the liquid is used to operate motor 22. Pistons 3, integral with pistons 2 and 15 serve to compress gas in respective chambers of a cylinder 7 during the combustion stroke to provide a spring restoring force for the pistons 2. A pressure transducer 29 measure the output pressure of the pumping units and transmits information to control unit 28 so that, if the engine becomes overloaded, the effective pumping part of the combustion stroke, i.e. in which the liquid operates motor 22, is shortened.
GB1332799D 1970-10-12 1970-10-12 Hydraulic power unit including a hydraulic pump operated by a free piston internal combustion engine Expired GB1332799A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4839770 1970-10-12

Publications (1)

Publication Number Publication Date
GB1332799A true GB1332799A (en) 1973-10-03

Family

ID=10448462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1332799D Expired GB1332799A (en) 1970-10-12 1970-10-12 Hydraulic power unit including a hydraulic pump operated by a free piston internal combustion engine

Country Status (1)

Country Link
GB (1) GB1332799A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502256A1 (en) * 1981-03-23 1982-09-24 Airmachines HYDRAULIC PUMP WITH VARIABLE STROKE PISTON AND GENERATOR USING THE PUMP
EP0085800A2 (en) * 1982-02-10 1983-08-17 Pneumo Abex Corporation Opposed piston type free piston engine pump unit
EP0328696A1 (en) * 1988-02-13 1989-08-23 Hewlett-Packard GmbH Valve unit
WO1992002730A1 (en) * 1990-08-02 1992-02-20 Gerhard Brandl Free-piston engine
EP1423611A1 (en) * 2001-09-06 2004-06-02 U.S. Environmental Protection Agency Fully-controlled, free-piston engine

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2502256A1 (en) * 1981-03-23 1982-09-24 Airmachines HYDRAULIC PUMP WITH VARIABLE STROKE PISTON AND GENERATOR USING THE PUMP
EP0061405A1 (en) * 1981-03-23 1982-09-29 Airmachines Hydraulic pistion pump with a variable stroke, and pressure-fluid generator using such a pump
US4461613A (en) * 1981-03-23 1984-07-24 Airmachines Hydraulic pump with variable-stroke piston and generator using said pump
EP0085800A2 (en) * 1982-02-10 1983-08-17 Pneumo Abex Corporation Opposed piston type free piston engine pump unit
EP0085800A3 (en) * 1982-02-10 1984-07-25 Pneumo Corporation Opposed piston type free piston engine pump unit
EP0328696A1 (en) * 1988-02-13 1989-08-23 Hewlett-Packard GmbH Valve unit
WO1992002730A1 (en) * 1990-08-02 1992-02-20 Gerhard Brandl Free-piston engine
EP1423611A1 (en) * 2001-09-06 2004-06-02 U.S. Environmental Protection Agency Fully-controlled, free-piston engine
EP1423611A4 (en) * 2001-09-06 2004-12-29 Us Environment Fully-controlled, free-piston engine

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees