GB715524A - Improvements in or relating to internal combustion engines and pistons therefor - Google Patents

Improvements in or relating to internal combustion engines and pistons therefor

Info

Publication number
GB715524A
GB715524A GB10447/51A GB1044751A GB715524A GB 715524 A GB715524 A GB 715524A GB 10447/51 A GB10447/51 A GB 10447/51A GB 1044751 A GB1044751 A GB 1044751A GB 715524 A GB715524 A GB 715524A
Authority
GB
United Kingdom
Prior art keywords
cavity
projection
orifice
piston
arcs
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
GB10447/51A
Inventor
Alberto Jorge Morris
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.)
Lister & Co Ltd R A
RA Lister and Co Ltd
Original Assignee
Lister & Co Ltd R A
RA Lister and Co 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 Lister & Co Ltd R A, RA Lister and Co Ltd filed Critical Lister & Co Ltd R A
Priority to GB10447/51A priority Critical patent/GB715524A/en
Publication of GB715524A publication Critical patent/GB715524A/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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0603—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0672—Omega-piston bowl, i.e. the combustion space having a central projection pointing towards the cylinder head and the surrounding wall being inclined towards the cylinder center axis
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0603—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head
    • F02B2023/0612—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston at least part of the interior volume or the wall of the combustion space being made of material different from the surrounding piston part, e.g. combustion space formed within a ceramic part fixed to a metal piston head the material having a high temperature and pressure resistance, e.g. ceramic
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
    • F02B23/0621—Squish flow
    • 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
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0618—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston having in-cylinder means to influence the charge motion
    • F02B23/0624—Swirl flow
    • 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
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • 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

Abstract

715,524. Combustion chambers. LISTER & CO., Ltd., R. A. May 2, 1952 [May 3, 1951], No. 10447/51. Class 7(3) In a combustion chamber formed by a cavity 8, Fig. 3, in a piston, the wall of the cavity is undercut around the periphery of the inlet orifice 9, which is formed by a throat tapering inwards towards the cavity, and the bottom of the cavity is provided with a projection 11 facing the orifice 9, the cavity surface being formed as a surface of revolution with its axis 8a coaxial with the projection 11 and orifice 9 and its generatrix having a greater radius of curvature adjacent the projection 11 than adjacent the orifice 9. The generatrix may comprise a portion of a spiral or, as shown, it may consist of two arcs 8b, 10b, Fig. 3, with centres at 8c, 10c spaced apart a distance equal to the difference between the radii of curvature of the two arcs, i.e. the two arcs meet in a common tangent. The combustion chamber may be formed by two insert members 10, 15, secured into a cylindrical recess in the piston, the rings being of a heat resistent material, such as a ceramic, and the base of the ring 15 being insulated from the piston by an air space. Alternatively the bottom portion of the chamber may be formed directly in the piston. The final entry portion of the throat 9 is preferably conical with an apex angle of 15 degrees and the ratio of the diameter of the narrowest part of the orifice 9 to the piston diameter lies within the range 0.15:1 and 0.25:1. The centre line of the fuel jet from a fuel injector 4 is arranged to impinge on the projection 11 within a circle concentric with the cavity 8 and having a radius of 0.1 of the radius of the lower portion 10b of the cavity. The apex of the projection 11 is at a distance of two-fifths of the radius of the lower portion 8b of the combustion chamber wall below the plane. containing the loci of the centres 8c, 10c, of the arcs 8b, 10b and the apex may be rounded, flattened, or formed with a depression facing the orifice 9. In a modification, Fig. 4, the projection is provided with a mushroom-shaped button 14.
GB10447/51A 1951-05-03 1951-05-03 Improvements in or relating to internal combustion engines and pistons therefor Expired GB715524A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB10447/51A GB715524A (en) 1951-05-03 1951-05-03 Improvements in or relating to internal combustion engines and pistons therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB10447/51A GB715524A (en) 1951-05-03 1951-05-03 Improvements in or relating to internal combustion engines and pistons therefor

Publications (1)

Publication Number Publication Date
GB715524A true GB715524A (en) 1954-09-15

Family

ID=9968027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10447/51A Expired GB715524A (en) 1951-05-03 1951-05-03 Improvements in or relating to internal combustion engines and pistons therefor

Country Status (1)

Country Link
GB (1) GB715524A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292940B (en) * 1962-05-22 1969-04-17 Lister & Co Ltd R A Pistons for internal combustion engines
EP0271478A2 (en) * 1986-12-12 1988-06-15 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Valve-controlled air-compressing internal-combustion engine
FR2952127A1 (en) * 2009-11-03 2011-05-06 Peugeot Citroen Automobiles Sa PISTON FOR INTERNAL COMBUSTION ENGINE AND ENGINE COMPRISING SUCH A PISTON

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1292940B (en) * 1962-05-22 1969-04-17 Lister & Co Ltd R A Pistons for internal combustion engines
EP0271478A2 (en) * 1986-12-12 1988-06-15 AVL Gesellschaft für Verbrennungskraftmaschinen und Messtechnik mbH.Prof.Dr.Dr.h.c. Hans List Valve-controlled air-compressing internal-combustion engine
EP0271478A3 (en) * 1986-12-12 1989-08-02 Avl Gesellschaft Fur Verbrennungskraftmaschinen Und Messtechnik Mbh.Prof.Dr.Dr.H.C. Hans List Valve-controlled air-compressing internal-combustion engine
FR2952127A1 (en) * 2009-11-03 2011-05-06 Peugeot Citroen Automobiles Sa PISTON FOR INTERNAL COMBUSTION ENGINE AND ENGINE COMPRISING SUCH A PISTON
WO2011055055A1 (en) * 2009-11-03 2011-05-12 Peugeot Citroën Automobiles SA Internal combustion engine piston and engine including such a piston

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