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
  • F02B19/00—Engines characterised by precombustion chambers
  • F02B19/02—Engines characterised by precombustion chambers the chamber being periodically isolated from its cylinder
  • F02B19/04—Engines characterised by precombustion chambers the chamber being periodically isolated from its cylinder the isolation being effected by a protuberance on piston or cylinder 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
  • 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
• • 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 invention relates to a process and a combustion chamber with variable turbulence used in high speed engines.
• the method and the unitary combustion chamber are also known, in which the absence of throttles in the path of the working fluid ensures a relatively reduced consumption of fuel, but has the disadvantage that they cannot operate at high speeds, following d '' a reduced level of organization of turbulence.
• the method and the synthetic combustion chamber, in accordance with the present invention overcome the disadvantages presented above, in that, in order to achieve reduced fuel consumption and increased flexibility of compression-ignition engines both as regards the range of turns and / or load, as regards the dimensional range, ensures the integral organization by volume of the circulation of fluid in the combustion chamber by the only temporary separation of the space from the tower room.
• the chamber forming a unitary whole, the combustion process as a whole constituting a synthesis between the chamber process unitary and the divided chamber method, the reinforcement of the turbulence being obtained as a result of the vectorial sum of at least three vortices, vortices with three-dimensional circulation and also by the enhancement of the threshold effect (squish) created by the piston, which accentuates the effect of transfer of the fluid between the one two enclosures which are separated by spatial profile which penetrates into the separation channel, profile defined by at least three steering surfaces, which produce vortices with three-dimensional circulation and constitute as a mobile braking threshold of the vortex enclosure, by concentrating the rich mixture which burns in the zone d u transfer channel, the circulation of the fluid in the swirling enclosure being thus determined, in order to meet the jet of fuel by equi-current and to move part of the fuel over the incandescent head of a candle.
• FIGS. 1 ... 7 Three examples of embodiments of the combustion chambers which apply the method according to the present invention are given, in relation to FIGS. 1 ... 7, which represent:
• the process of synthetic combustion in accordance with the present invention consists in the fact that the space of the ⁇ turbulence chamber is separated from the combustion chamber compartment located above the piston, only during the period of injection, mixture formation and combustion, i.e. in the final compression phase, during the rest of the cycle combustion chamber forming a unitary whole, in this way a reduction in gas losses is ensured and also an integral organization of the circulation following the vector sum of at least three vortices, vortices with three-dimensional circulation.
• the synthetic combustion process leads to the reinforcement of turbulence and by the enhancement of the threshold effect (squish) which accentuates the transfer effect, the maximums of which are situated at different angles -in the evolution of the cycle - the first that appears is the maximum crossing.
• the combustion chamber in accordance with the present invention, is formed by an enclosure a which constitutes the divided space located in a cylinder head 1 and an enclosure b, located in a piston 2, which constitutes the second space of the combustion chamber .
• the two combustion spaces a and b are linked together by a channel c formed between an inner surface d and a refractory insert 3 and an appropriate profile, integral with the piston 2, the channel ca a variable section only at the end of compression and at the beginning of the expansion faze for a period of approximately ⁇ 15 ° - 20 ° RA near the PMI.
• the maximum section of the channel c is established so that the retreat of the piston 2 unifies the spaces a and b oe which leads to the creation of an almost unitary chamber.
• the spatial profile e of the piston 2 is defined by two inclinations f and g, which at the same time constitute the direc main tions of the organization of the circulation of the fluid in the passage in and of the enclosure a in the enclosure b.
• the two inclinations f and g ensure the formation of vortices h, simmetric vortices - toric - i which add vactorial and produce a three-dimensional circulation fully organized in the entire volume of the combustion chamber. Aasurend a circulation fully organized in the entire volume of the chamber, allows the use of injectors 4 to one, or to several injection orifices whose jets are directly linked with the circulation of air in the combustion chamber.
• injectors with several orifices allows the application of the method and of constructive solutions, in accordance with the present invention also for engines of large dimensions.
• the synthetic combustion chamber consisting of an enclosure a temporally divided and an enclosure b, can be produced in various constructive variants, both with regard to the shape of the enclosure a and that of the enclosure b, which 'with regard to the compartmentalisation ratio between the two enclosures.
• the divided space has a sphero-conical shape and the degree of compartmentalization is approximately 50% and the circulation of air in the final compression faze first meets a boygie d ignition 5 and then enters the injection zone, antering the jet of fuel by equicurrent.
• the vortex enclosure has a cylindrical-spherical shape, which allows better integration of the jet of fuel in the organized fluid and a division ratio which tends towards 100%, the realization of which is also facilitated by the very low gas-dinamic losses, specific for the synthesis chambers in accordance with the invention.
• the air circulation in the final compression faze first encounters an ignition rod and then enters the injection zone, entraining the jet of fuel by equicurrent.
• a third constructive variant represented in FIG. 7, the flow of fluid flows through the enclosure a of the combustion chamber, firstly meeting the jet of fuel which it entails by equicurrent and deposits part of the fuel injected on the head glowing candle 5.
• the synthetic combustion chamber in accordance with the present invention without taking account of the constructive variants mentioned below, and which are not limiting, any variant or combination forming part of the present invention, can be applied to engines with slow speed or rapid, with black or forced admission, the condition of having an advance to the injection is not a limiting element.

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)

Applications Claiming Priority (2)

Publications (1)

Family

ID=20108442

Family Applications (1)

Country Status (4)

Cited By (1)

Families Citing this family (1)

Family Cites Families (2)

• 1980
  • 1980-04-27 RO RO80100981A patent/RO77086A2/ro unknown
• 1981
  • 1981-04-21 EP EP81901338A patent/EP0050665A1/fr not_active Withdrawn
  • 1981-04-21 GB GB8201858A patent/GB2088952B/en not_active Expired
  • 1981-04-21 WO PCT/RO1981/000002 patent/WO1981003048A1/fr unknown

Non-Patent Citations (1)

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