EP0151313B1 - Gasmotor - Google Patents

Gasmotor Download PDF

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Publication number
EP0151313B1
EP0151313B1 EP84116383A EP84116383A EP0151313B1 EP 0151313 B1 EP0151313 B1 EP 0151313B1 EP 84116383 A EP84116383 A EP 84116383A EP 84116383 A EP84116383 A EP 84116383A EP 0151313 B1 EP0151313 B1 EP 0151313B1
Authority
EP
European Patent Office
Prior art keywords
gas
valve
piston
engine
shut
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
EP84116383A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0151313A1 (de
Inventor
Peter A. Dr.Sc.Techn. Neukomm
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.)
PEWA TECHNIC AG
Original Assignee
PEWA TECHNIC AG
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 PEWA TECHNIC AG filed Critical PEWA TECHNIC AG
Priority to AT84116383T priority Critical patent/ATE31343T1/de
Publication of EP0151313A1 publication Critical patent/EP0151313A1/de
Application granted granted Critical
Publication of EP0151313B1 publication Critical patent/EP0151313B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • F01B25/00—Regulating, controlling or safety means
    • F01B25/02—Regulating or controlling by varying working-fluid admission or exhaust, e.g. by varying pressure or quantity
    • 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
    • F02B75/34—Ultra-small engines, e.g. for driving models
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H29/00—Drive mechanisms for toys in general
    • A63H29/10—Driving mechanisms actuated by flowing media
    • A63H29/16—Driving mechanisms actuated by flowing media by steam or compressed air
    • 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
    • F01B17/00—Reciprocating-piston machines or engines characterised by use of uniflow principle
    • F01B17/02—Engines
    • 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
    • F01B29/00—Machines or engines with pertinent characteristics other than those provided for in preceding main groups
    • F01B29/08—Reciprocating-piston machines or engines not otherwise provided for
    • F01B29/10—Engines

Definitions

  • the present invention relates to a gas engine with a cylindrical working space closed by a gas inlet valve designed as an openable check valve and a piston reciprocating therein, and with a gas supply channel leading from a compressed gas container to the gas inlet valve.
  • Such a gas engine is known from GB-A-1 553 678.
  • a piston is arranged so that it can move back and forth in a cylindrical working space.
  • the piston is connected via a connecting rod to a crankshaft that carries the propeller of a model airplane.
  • the cylinder head has a central bore that can be closed by a gas inlet valve.
  • a ball located in the cylinder head on the side facing away from the cylinder space and behind the central bore on a valve seat serves as the valve body.
  • the cylinder head is connected via a gas supply channel to a compressed gas container containing carbon dioxide. The gas pressure pushes the ball onto the valve seat and keeps the gas inlet valve closed.
  • the gas inlet valve works like a check valve.
  • the gas inlet valve is pushed open by means of an extension formed on the top of the piston and opened in order to allow gas to flow into the working space.
  • the approach hits the ball when the piston is in the top dead center area at the end of its backward stroke and at the start of its working stroke and lifts it off the valve seat.
  • the piston can stop in the course of its reverse stroke shortly before reaching the top dead center area or in the dead center area. In this case, restarting the engine is difficult because the piston has to perform at least one partial stroke against full gas pressure when starting. It can also happen that the gas engine starts in the wrong direction for this reason. In the case of toys, such as toy cars and other driven devices with a reduction gear between the motor shaft and the motor starting point, a restart can even become impossible.
  • a reduction in compression in the cylinder mentioned in DE-C-253 141 during starting of the engine by keeping a purge valve open would lead to a large loss of drive gas because drive gas would escape through the open purge valve.
  • the object of the invention is to provide a gas engine of the type mentioned, which is easy and always startable in the desired direction of rotation in all positions of the piston in the cylinder and also in the presence of a step-down gear between the motor shaft and the motor starting point, the handling of the motor should be easy when starting.
  • a multi-way shut-off device arranged in the gas supply channel is provided with two valve closure parts which can be connected to one another and can be brought into two positions, of which the first in the second position of the multi-way shut-off device, in the start position of the gas engine, the inlet side of the gas inlet valve with one outside connects the opening air duct and closes the air duct in the operating position and acts as a check valve and keeps both valve closure parts under the pressure prevailing in the compressed gas container in the operating position and the second valve closure part closes the compressed gas container in the starting position and in the operating position the gas supply duct between the Releases the inlet side of the gas inlet valve and the pressure gas container, the two valve closure parts being able to be pushed from the outside against the force acting on the check valve from the operating position into the starting position.
  • the two valve closure parts are provided on one of the two effective areas of the valve closure parts, provided with longitudinal grooves in a longitudinally displaceable manner by means of two O-rings which are axially spaced apart and held in parallel in stationary parts and serve as a valve seat cylindrical pin formed, the part provided with longitudinal grooves when the valve is open and the cylindrical part without longitudinal grooves in the O-ring when the valve is closed.
  • the single figure shows a gas engine with a reusable shut-off device in the starting position in section.
  • the piston 1 of the gas engine shown is guided to and fro in a cylinder 2 and is connected via a connecting rod 3 to a crankshaft 5 mounted in a crankshaft housing 4.
  • the crankshaft 5 can drive the wheels of a toy car or directly the propeller of a model airplane via a gear, not shown.
  • the application of the gas engine is by no means limited to toys.
  • the cylinder head 6 is screwed onto an extension of the cylinder 2 and, on its part which projects into the bore of the cylinder 2 and is provided with an O-ring 7, carries a gas inlet valve 9 which is tightly guided in the cylinder bore by an O-ring 8.
  • the closure part of the gas inlet valve 9 consists of a ball 12 that can be pushed through a gas inlet opening 11 by an extension 10 formed on the top of the piston 1.
  • the gas inlet valve 9 moves in the cylinder bore, thereby causing the valve to open and thus the speed of the gas engine can be regulated.
  • the gas released in the cylinder chamber escapes through the exhaust opening 32 when the piston 1 is in the lowest position.
  • a gas supply channel 14 is provided between the gas inlet valve 9 and a compressed gas container 13 containing a suitable drive gas.
  • the compressed gas container 13 is a commercially available carbon dioxide cartridge with liquefied gas, which is screwed onto the crankshaft housing 4 by means of a sleeve 15.
  • This reusable shut-off device 16 has an actuating button 17 which is accessible from the outside and which can assume a depressed starting position and an operating position shown in broken lines in the figure. In the starting position, the inlet side of the gas inlet valve 9 is vented via an air duct 18 leading to the outside and the compressed gas container 13 is closed.
  • the reusable shut-off device 16 is equipped with two valve closure parts 19, 20 connected to one another.
  • the two closure parts 19, 20 are formed on a cylindrical pin 21 which can block the flow of gas through two O-rings 22, 23 serving as valve seats. The space between the two O-rings 22, 23 communicates with the inlet side of the gas inlet valve 9.
  • the sides of the O-rings 22, 23 facing away from this space are in gas connection with the compressed gas container 13 or with the air duct 18.
  • the cylindrical pin 21 is longitudinally displaceable up to the stops and has partial longitudinal grooves 24 in the two effective areas of the valve closure parts 19, 20. If the valve for ventilation of the cylinder space between the inlet side of the gas inlet valve 9 and the air duct 18 is to be opened, the pin 21 is pressed into the O-ring 22 until the longitudinal grooves 24 come to rest in the region of the O-ring . Through the longitudinal grooves 24, the gas can escape from the gas inlet valve 9 via the air duct 18. In this position of the pin 21, however, the cylindrical part of the closure part 20 reaches the area of the O-ring 23 and closes the compressed gas container 13.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Glass Compositions (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Gas Separation By Absorption (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Toys (AREA)
  • Fluid-Driven Valves (AREA)
  • Check Valves (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Mechanically-Actuated Valves (AREA)
EP84116383A 1984-01-25 1984-12-27 Gasmotor Expired EP0151313B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84116383T ATE31343T1 (de) 1984-01-25 1984-12-27 Gasmotor.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH316/84A CH662746A5 (de) 1984-01-25 1984-01-25 Druck-gasmotor.
CH316/84 1984-01-25

Publications (2)

Publication Number Publication Date
EP0151313A1 EP0151313A1 (de) 1985-08-14
EP0151313B1 true EP0151313B1 (de) 1987-12-09

Family

ID=4184233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116383A Expired EP0151313B1 (de) 1984-01-25 1984-12-27 Gasmotor

Country Status (13)

Country Link
US (1) US4614085A (da)
EP (1) EP0151313B1 (da)
JP (1) JPS60175702A (da)
KR (1) KR850005548A (da)
AT (1) ATE31343T1 (da)
AU (1) AU3804185A (da)
BR (1) BR8500277A (da)
CH (1) CH662746A5 (da)
DE (1) DE3468057D1 (da)
DK (1) DK599484A (da)
FI (1) FI850257L (da)
NO (1) NO850276L (da)
ZA (1) ZA85380B (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5878568A (en) * 1998-04-02 1999-03-09 Chuang; Chia-Chiung Pneumatic tool
NZ337744A (en) 1998-10-26 2001-04-27 Charles D Piston-to-cylinder seal for a pneumatic engine with pressure dependent, variable sealing diameter
US6626079B1 (en) 2002-03-28 2003-09-30 Rehco, Llc Pneumatic motor
CN106669186A (zh) * 2015-11-07 2017-05-17 马铿杰 大幅运动随动式五自由度适航仪
CN111691925B (zh) * 2020-06-24 2021-11-09 张谭伟 一种空气发动机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE381677C (de) * 1923-09-22 Boaf Berlin Oranienburger Arma Kompressionshahn mit einem als Ventil wirkenden Drehschieber
DE253141C (da) *
US1189067A (en) * 1913-07-26 1916-06-27 Birge W Davenport Fluid-pressure engine-starter.
US4211083A (en) * 1971-09-22 1980-07-08 Takahiro Ueno Method for driving a vehicle driven by an internal combustion engine
DE3034854A1 (de) * 1976-10-26 1982-05-13 Mtu Motoren- Und Turbinen-Union Friedrichshafen Gmbh, 7990 Friedrichshafen Dieselbrennkraftmaschine
GB1553678A (en) * 1977-05-18 1979-09-26 Harden Associated Ltd Engine
US4166441A (en) * 1977-08-09 1979-09-04 Grigsby Gilbert R Compressed air-actuated fluid injection apparatus

Also Published As

Publication number Publication date
FI850257A7 (fi) 1985-07-26
AU3804185A (en) 1985-08-01
ZA85380B (en) 1985-09-25
EP0151313A1 (de) 1985-08-14
FI850257A0 (fi) 1985-01-21
NO850276L (no) 1985-07-26
KR850005548A (ko) 1985-08-26
JPS60175702A (ja) 1985-09-09
CH662746A5 (de) 1987-10-30
BR8500277A (pt) 1985-09-03
DE3468057D1 (en) 1988-01-21
ATE31343T1 (de) 1987-12-15
FI850257L (fi) 1985-07-26
DK599484D0 (da) 1984-12-14
DK599484A (da) 1985-07-26
US4614085A (en) 1986-09-30

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