GB1443421A - Variable compression ration engine - Google Patents

Variable compression ration engine

Info

Publication number
GB1443421A
GB1443421A GB1608072A GB1608072A GB1443421A GB 1443421 A GB1443421 A GB 1443421A GB 1608072 A GB1608072 A GB 1608072A GB 1608072 A GB1608072 A GB 1608072A GB 1443421 A GB1443421 A GB 1443421A
Authority
GB
United Kingdom
Prior art keywords
cam
lobe
engine
shaft
inlet
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
GB1608072A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1608072A priority Critical patent/GB1443421A/en
Priority to ZA00732431A priority patent/ZA732431B/en
Publication of GB1443421A publication Critical patent/GB1443421A/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
    • F02B41/00—Engines characterised by special means for improving conversion of heat or pressure energy into mechanical power
    • F02B41/02—Engines with prolonged expansion
    • F02B41/04—Engines with prolonged expansion in main cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0036—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • F01L13/0042—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction with cams being profiled in axial and radial direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/08—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion
    • F16H25/10—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for interconverting rotary motion and reciprocating motion with adjustable throw
    • 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
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • 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)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)

Abstract

1443421 Cams &c. M V HINDERKS 9 July 1973 [7 April 1972 (2)] 16080/72 and 16081/72 Heading F2K [Also in Division F1] A cam and follower mechanism comprises a rotary cam having a first lobe 4, the radial dimension of which varies along the axis of the cam and at least one other lobe 3. The cam is used to operate the inlet and/or exhaust valve of an I.C. engine, and is arranged to slide axially to vary the valve lift and dwell. The second lobe 3 opens the inlet valve during the compression stroke to allow some of the mixture to escape and thereby vary the maximum compression pressure. At one end of the cam, the lift provided by the lobe 3 decreases to zero, Fig. 2a. The exhaust valve may be timed to be opened by lobe 3 when a negative pressure pulse exists at the exhaust port. Fig. 4 shows a device for moving a cam axially in accordance with engine speed and load. A cam shaft 3a is carried by bearings 6a, 7a and at one end has centrifugal weights 8a, which move shaft 3a to the right as engine speed increases. At the other end of the shaft is a piston 9, subject on one side to atmospheric pressure and on the other side to inlet manifold pressure in chamber 10.
GB1608072A 1972-04-07 1972-04-07 Variable compression ration engine Expired GB1443421A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1608072A GB1443421A (en) 1972-04-07 1972-04-07 Variable compression ration engine
ZA00732431A ZA732431B (en) 1972-04-07 1973-04-09 A variable compression ratio engine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1608172 1972-04-07
GB1608072A GB1443421A (en) 1972-04-07 1972-04-07 Variable compression ration engine

Publications (1)

Publication Number Publication Date
GB1443421A true GB1443421A (en) 1976-07-21

Family

ID=26251777

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1608072A Expired GB1443421A (en) 1972-04-07 1972-04-07 Variable compression ration engine

Country Status (1)

Country Link
GB (1) GB1443421A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360752A1 (en) * 1976-08-03 1978-03-03 Maschf Augsburg Nuernberg Ag INTERNAL COMBUSTION ENGINE WITH REVERSIBLE ALTERNATIVE MOVEMENT PISTON
GB2128284A (en) * 1982-10-18 1984-04-26 Nabisco Brands Inc Adjustable cam actuator
GB2190140A (en) * 1986-05-01 1987-11-11 Chris Walters Valve lift mechanism
GB2242952A (en) * 1990-04-11 1991-10-16 Gen Motors Corp Valve train with lash/compliance compensation
GB2279718A (en) * 1993-07-02 1995-01-11 Robert Alexander James A variable camshaft
ES2323400A1 (en) * 2007-08-08 2009-07-14 Antonio Ribas Bonet Camshaft (Machine-translation by Google Translate, not legally binding)
CN102852577A (en) * 2011-06-29 2013-01-02 周同庆 Four-stroke internal combustion engine including exhaust cam provided with two bulges

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2360752A1 (en) * 1976-08-03 1978-03-03 Maschf Augsburg Nuernberg Ag INTERNAL COMBUSTION ENGINE WITH REVERSIBLE ALTERNATIVE MOVEMENT PISTON
GB2128284A (en) * 1982-10-18 1984-04-26 Nabisco Brands Inc Adjustable cam actuator
GB2190140A (en) * 1986-05-01 1987-11-11 Chris Walters Valve lift mechanism
GB2190140B (en) * 1986-05-01 1989-12-06 Chris Walters Valve lift mechanism
GB2242952A (en) * 1990-04-11 1991-10-16 Gen Motors Corp Valve train with lash/compliance compensation
GB2242952B (en) * 1990-04-11 1993-11-03 Gen Motors Corp Valve train with lash/compliance compensation
GB2279718A (en) * 1993-07-02 1995-01-11 Robert Alexander James A variable camshaft
ES2323400A1 (en) * 2007-08-08 2009-07-14 Antonio Ribas Bonet Camshaft (Machine-translation by Google Translate, not legally binding)
CN102852577A (en) * 2011-06-29 2013-01-02 周同庆 Four-stroke internal combustion engine including exhaust cam provided with two bulges
CN102852577B (en) * 2011-06-29 2015-07-15 周同庆 Four-stroke internal combustion engine including exhaust cam provided with two bulges

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Legal Events

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