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
  • F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
  • F02B69/02—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel
  • F02B69/04—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different fuel types, other than engines indifferent to fuel consumed, e.g. convertible from light to heavy fuel for gaseous and non-gaseous fuels
• • 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
  • F02B23/08—Other engines characterised by special shape or construction of combustion chambers to improve operation with positive ignition
• • 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
  • F02B69/00—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types
  • F02B69/06—Internal-combustion engines convertible into other combustion-engine type, not provided for in F02B11/00; Internal-combustion engines of different types characterised by constructions facilitating use of same main engine-parts in different types for different cycles, e.g. convertible from two-stroke to four stroke
• • 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
  • F02B1/00—Engines characterised by fuel-air mixture compression
  • F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
  • F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
• • 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
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F1/00—Cylinders; Cylinder heads 
  • F02F1/24—Cylinder heads
  • F02F2001/249—Cylinder heads with flame plate, e.g. insert in the cylinder head used as a thermal insulation between cylinder head and 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

Definitions

• the engine is an engine originally designed to operate on a diesel cycle modified to use a gaseous fuel.
• one of the valves may be largely occluded by a member passing over the top thereof which increases the swirling of the charge.
• the spark plug may preferably be located in what is the injector hole of the cylinder when the engine is being used with diesel fuel.
• Figure 2 is an underneath view of the cylinder head
• Figure 5 is a section along line 5-5 of Figure 2, similar to that of Figure 4 showing the exhaust valve arrangement.
• a metal spacer plate 10 which, in this particular example, is made to be associated with the head 20 for one cylinder as each cylinder has a separate head.
• This plate 10 is adapted to co-operate with the cylinder head 20 which, in one form, has inlet and outlet valves 21,22 and their seats 23,24 and an injector aperture 25 which is modified to receive a spark plug 26.
• the injector As the charge to be passed into the cylinder, when the engine is being used in its diesel mode, the injector is located to provide dispersion of the diesel fuel charge. We have found that the position in the particular engine of the injector is satisfactory for the spark plug 26.
• the surface 13 of the plate 10, which is outwardly directed when it is positioned, that is the surface against which the head 20 rests, is machined smooth and may have an inwardly relieved counter bore to co-operate with a downward extension 16 on the head which, in diesel operation, provides a protector for the head gasket and a first gasket 15 can be located between the plate and the head.
• the other surface 14of the plate which is the inner side, has a downwardly directed annular skirt 15 which is largely to protect a second cylinder head gasket 18, which abuts thereagainst against outwardly directed pressure when the piston 40 moves upwardly in the cylinder.
• the inner surface of the annular skirt 15 can be tapered at 17 so as to receive a correspondingly formed upper end 41 of the piston, as will be described later.
• the cutout portion 16 can be deemed to be substantially heart-shaped and what would be considered to be the top of the heart is an incursion into the position between the two valves and then follows around the outer periphery of the valves. The cutout portion then extends downwardly beside the valves and ultimately to a position below the valves opposite the inwardly directed portion.
• the two valves could be considered to be largely in the two upper lobes of the heart-shaped portion and at the opposite side the heart-shaped portion is spaced from the valves.
• the portion about the exhaust valve 51 can basically be arranged so there is as little obstruction as possible to the exhaust gases being purged from the cylinder during the exhaust stroke of the engine. It can be to a major extent, a continuation of the valve seat 24 to aid this flow.
• the portion 52 about the inlet valve adjacent the top of the heart can, in vertical cross section, and as seen from Figure 4, be arcuate with the centre part of the arc 53 being substantially lying in the plane in which the head of the inlet valve 21 will lie when it is in its fully open position.
• the arrangement is such that the combustion mixture from the side of the valve away from the top of the heart shaped portion moves into the combustion chamber at an angle to the surface thereof and moves outwardly and strikes the wall of the combustion chamber.
• the combustion mixture from the other side of the valve impinges upon the arcuate portion 52 and is moved across the head of the valve and is thus reinforcing the movement of the other portion so there is a general flow towards the periphery of the combustion chamber, but at an angle thereto so that the total gas mixture tends to swirl, generally about the cylinder.
• the portion 54 of the recess opposite the valves is tapered so that the rotating combustion mixture tends to be forced to move spirally, down into the cylinder.
• This movement can be assisted by the inlet into the valve which can be at such a direction as to minimise the degree of deflection necessary for the charge leaving the valve from the unrestricted side and to aid in the turning of the charge from the side where the annular recess is located.
• the overlying part 17 extends around approximately half of the circumference of the valve so that the movement of the charge towards the wall contains as much of the charge as possible and as the piston 40 moves upwardly to the firing point, which can be close to top dead centre, or even advanced therefrom, the swirling movement of the charge is maintained as far as possible.
• the charge is again induced and because of the shape of the heart-shaped cutout and the positioning of the recess or the portion overlying the valve, the new charge will be induced to spin or swirl so that when compression occurs there is again complete ignition.
• the tapered portion 17 which passes into the cylinder 31 serves a purpose beyond protecting the head gasket 18, as mentioned earlier, although it certainly does do that, but also can aid in the combustion of the charge.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Combustion Methods Of Internal-Combustion Engines (AREA)
• Cylinder Crankcases Of Internal Combustion Engines (AREA)
• Ignition Installations For Internal Combustion Engines (AREA)
• Valve Device For Special Equipments (AREA)
• Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=3810034

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (13)

Citations (2)

Family Cites Families (3)

• 1998
  • 1998-09-11 AU AUPP5810A patent/AUPP581098A0/en not_active Abandoned
• 1999
  • 1999-09-13 KR KR1020017003182A patent/KR100584015B1/ko not_active Expired - Fee Related
  • 1999-09-13 JP JP2000570456A patent/JP4395260B2/ja not_active Expired - Fee Related
  • 1999-09-13 DE DE69939386T patent/DE69939386D1/de not_active Expired - Fee Related
  • 1999-09-13 US US09/787,066 patent/US6435153B1/en not_active Expired - Fee Related
  • 1999-09-13 AT AT99945768T patent/ATE405733T1/de not_active IP Right Cessation
  • 1999-09-13 EP EP99945768A patent/EP1112443B8/en not_active Expired - Lifetime
  • 1999-09-13 WO PCT/AU1999/000755 patent/WO2000015953A1/en not_active Ceased
  • 1999-09-13 CN CN99813192A patent/CN1109812C/zh not_active Expired - Fee Related

Patent Citations (2)

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