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GB1495556A - Stepped-piston two-stroke engines - Google Patents

Stepped-piston two-stroke engines

Info

Publication number
GB1495556A
GB1495556A GB52293/73A GB5229373A GB1495556A GB 1495556 A GB1495556 A GB 1495556A GB 52293/73 A GB52293/73 A GB 52293/73A GB 5229373 A GB5229373 A GB 5229373A GB 1495556 A GB1495556 A GB 1495556A
Authority
GB
United Kingdom
Prior art keywords
cylinder
piston
air
engine
pumping
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
GB52293/73A
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.)
Norton Villiers Ltd
Original Assignee
Norton Villiers Ltd
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 Norton Villiers Ltd filed Critical Norton Villiers Ltd
Priority to GB52293/73A priority Critical patent/GB1495556A/en
Publication of GB1495556A publication Critical patent/GB1495556A/en
Expired legal-status Critical Current

Links

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
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/02—Engines with reciprocating-piston pumps; Engines with crankcase pumps
    • F02B33/06—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps
    • F02B33/10—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder
    • F02B33/14—Engines with reciprocating-piston pumps; Engines with crankcase pumps with reciprocating-piston pumps other than simple crankcase pumps with the pumping cylinder situated between working cylinder and crankcase, or with the pumping cylinder surrounding working cylinder working and pumping pistons forming stepped piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/30—Arrangements for supply of additional air
    • F01N3/32—Arrangements for supply of additional air using air pump
    • 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
    • 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
    • Y02T10/12—Improving ICE efficiencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

1495556 Stepped piston engines NORTON VILLIERS Ltd 10 Feb 1975 [10 Nov 1973] 52293/73 Heading F1B A two-stroke I.C. engine has one or more cylinders each containing a stepped piston, each cylinder and piston having a pumping part of larger diameter and a working part of smaller diameter, air being delivered from the pumping part or parts of the cylinder(s) and is characterized in that the engine is provided with means to receive a portion of the air from the pumping part of the cylinder and to feed the portion of air as secondary air to an emission control device where it mixes, when the engine is in operation, with the exhaust gases discharged from the working part(s) of the cylinder(s). The pumping part 15 of the piston delivers air only to two receivers 30, when recess 33 uncovers two ports 32 as the piston approaches T.D.C. At the same time some air (secondary air) leaves the pumping cylinder by union 28 and non-return valve 27 and through nozzle 25 is ejected into annular space 24 between the wall of an exhaust passage leading from exhaust port 18, and a heatresistant metal sleeve 23. The secondary air mixes with the exhaust gases to promote after-combustion in thermal reactor 20. Valve 22 causes turbulence to mix the air and exhaust gas. As the piston approaches B.D.C. the ports 32 are uncovered and air from the receivers scavenges and re-fills the working cylinders. Fuel is injected into the receivers 30, passages 31 or the combustion chamber. In a multi-cylinder engine, the cylinders are grouped in pairs and the pumping part of one piston/cylinder supplies air to the other cylinder. A receiver may be common to more than one cylinder but in all cases, the receiver volume is at least three times the swept volume of the pumping part of one cylinder. The swept volume of the pumping part is 1À3 to 1À4 times the swept volume of the working part. Fig. 4 shows an engine having a stepped piston working at each end of a single cylinder. Part 83 of piston 79 controls exhaust ports 84. Inlet ports 87 are controlled by part 81 of piston 78. There is a spark-plug 91 and fuel injector 90.
GB52293/73A 1973-11-10 1973-11-10 Stepped-piston two-stroke engines Expired GB1495556A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB52293/73A GB1495556A (en) 1973-11-10 1973-11-10 Stepped-piston two-stroke engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB52293/73A GB1495556A (en) 1973-11-10 1973-11-10 Stepped-piston two-stroke engines

Publications (1)

Publication Number Publication Date
GB1495556A true GB1495556A (en) 1977-12-21

Family

ID=10463386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB52293/73A Expired GB1495556A (en) 1973-11-10 1973-11-10 Stepped-piston two-stroke engines

Country Status (1)

Country Link
GB (1) GB1495556A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002416A1 (en) * 1985-10-19 1987-04-23 Bernard Hooper Internal combustion engine
GB2259549A (en) * 1991-09-12 1993-03-17 Ford Motor Co Two stroke engine with pressurised air direct fuel injection
WO1995033130A1 (en) * 1994-05-30 1995-12-07 Helmut Kottmann Two-stroke internal-combustion engine with charging cylinder
US5857450A (en) * 1997-06-24 1999-01-12 Brunswick Corporation Low emission two cycle engine using two segment piston
RU2539251C2 (en) * 2013-02-28 2015-01-20 Павел Игнатьевич Загуменнов Metal heat-exchange surface and two-stroke ice with metal heat exchange surface (versions)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987002416A1 (en) * 1985-10-19 1987-04-23 Bernard Hooper Internal combustion engine
GB2259549A (en) * 1991-09-12 1993-03-17 Ford Motor Co Two stroke engine with pressurised air direct fuel injection
WO1995033130A1 (en) * 1994-05-30 1995-12-07 Helmut Kottmann Two-stroke internal-combustion engine with charging cylinder
US5755191A (en) * 1994-05-30 1998-05-26 Kottmann; Helmut Two-stroke internal combustion engine with charging cylinder
US5857450A (en) * 1997-06-24 1999-01-12 Brunswick Corporation Low emission two cycle engine using two segment piston
RU2539251C2 (en) * 2013-02-28 2015-01-20 Павел Игнатьевич Загуменнов Metal heat-exchange surface and two-stroke ice with metal heat exchange surface (versions)

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee