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
  • F02B37/00—Engines characterised by provision of pumps driven at least for part of the time by exhaust
  • F02B37/02—Gas passages between engine outlet and pump drive, e.g. reservoirs
• • 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 method for effectivated use of exhaust gases in combustion engines, especially in big diesel motors, according to the preamble of claim 1 and to an exhaust pipe arrangement for putting the method into practice according to the preamble of claim 4.
• An object of the invention is to create an improved method for feeding exhaust gases of a motor into the turbo charger attached thereto, and to provide an improved exhaust pipe arrangement for putting the method into practice.
• a further object is to hereby improve the economy of fuel consumption and the efficiency of the motor.
• the exhaust gases of preferably each cylinder are fed into the exhaust pipe separately from other exhaust gases essentially in tangential direction with respect to the exhaust pipe from the side thereof and substantially in transversal direction with respect to the axis thereof for accomplishing a spiral- formed flow around the axis of the exhaust pipe.
• Said spiral-formed flow is thereafter joined to the cumulative main exhaust gas flow of the exhaust gases from separate cylinders and led into the turbo charger of the motor so that at least part of the kinetic energy of the exhaust gases is maintained all the way to the turbo charger.
• pressure in the exhaust pipe remains lower in comparison with previous systems, because a greater part of the energy of the pressure pulses of the exhaust gases from the cylinders is kinetic.
• fuel consumption is decreased fuel consumption.
• a big exhaust pipe comprises pipe units, which include an outer pipe element and an inner pipe element, whereby the exhaust gases from the cylinders are separately arranged to be led essentially in tangential direction with respect to the exhaust pipe from one side thereof and substantially in transversal direction with respect to the axis thereof into the space between said outer and inner pipe elements so as to move around the axis of the exhaust pipe as a spiral- formed flow to be joined to the cumulative main exhaust gas flow of the exhaust gases from separate cylinders flowing through the inner pipe element and led into the turbo charger of the motor so, that, at least part of the kinetic energy of the exhaust gases is maintained all the way to the turbo charger.
• the separate exhaust gas flow led from the cylinder Before joining to the main exhaust gas flow the separate exhaust gas flow led from the cylinder can be arranged to move spiral-formed in the longitudinal direction of the exhaust pipe a distance roughly corresponding to the inner diameter of the exhaust pipe.
• the exhaust gases from the cylinder are with advantage led into the exhaust pipe so that the outer pipe element of the pipe unit is provided with a transversal attachment member smoothly attached to the pipe element and by arranging a depression on the inner surface of the outer pipe element to form an extension for said attachment member, said depression being arranged to turn along the pipe element for some distance for making the spiral flow of the exhaust gases more efficient.
• the outer and inner pipe elements can further be formed such that they guide the separate exhaust gas flow led from the cylinder as well as the main exhaust gas flow towards the central part of the exhaust pipe at the position or in the vicinity of the position, in which said flows are joined, so as to provide a sucking effect for the separate exhaust gas flow.
• Each adjoining cylinder of the motor is with advantage provided with a pipe unit of its own, whereby the successi ⁇ ve pipe units together form the exhaust pipe.
• Supporting of the inner and outer pipe element to each other takes place by means of flanges at one end thereof.
• the pipe units When needed the pipe units are attached to each other by means of an intermediate element, which is provided with a flange at both ends thereof and the inner diameter of which corresponds to the inner diameter or the inner pipe element of the pipe unit.
• figure 1 shows as a side view an exhaust pipe arrange ⁇ ment according to the invention
• figure 2 shows section A-A of figure 1.
• reference numeral 1 indicates part of an exhaust pipe of a motor including two successive pipe units 2; which are supported to one another by means of an intermediate element 3.
• Each pipe unit 2 comprises an outer p pe element 4 and an inner pipe element 5, which are supported to one another by means of flanges 7 and 8 at one end thereof.
• the intermediate element 3 for its part includes flanges 9, by means of which it is fixed to the first pipe unit on the flanges 7 and 8 of the outer and inner pipe elements 4 and 5 and to the second pipe unit only on the flange 7 of the outer pipe element 4 respecti ⁇ vely.
• Each pipe unit 2 is adapted to receive exhaust gases from one cylinder (not shown) of the motor.
• the exhaust gas flow from the cylinder which is depicted by arrow 10, is led by means of an attachment member 11 into the space between the inner pipe element 5 and the outer pipe element 4.
• a depression 12 has been made within the outer pipe element 4.
• the outer pipe element 4 comprises further a guiding surface 13, by means of which the separate exhaust gas flow 10 from the cylinder is led towards the central part of the exhaust pipe at the same time as it joins to the cumulative main flow of the exhaust gases from separate cylinders, which is depicted by arrow 14, thereafter to be led into the turbo charger of the motor (not shown in the figures).
• a guiding surface 15 has been made in the inner pipe element 5 for guiding and compressing the main flow towards the central part of the pipe.
• the velocity of the main flow increases and causes a so called Venturi-phenomenon, whereby the main flow sucks along from the edge parts of the pipe the exhaust gases led from the cylinder.
• the main flow 14 moves in a spiral-like manner and maintains a part of the kinetic energy of the separate exhaust gas flows from the cylinders. This results in decreased fuel consumption.
• the pressure pulses have no adverse effect on removal of the exhaust gases from the cylinders.
• the exhaust pipe comprises several pipe units 2 correspondingly and intermediate elements 3 separating these.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Exhaust Silencers (AREA)
• Supercharger (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8524584

Family Applications (1)

Country Status (4)

Cited By (3)

Families Citing this family (2)

Citations (5)

• 1987
  • 1987-05-29 FI FI872419A patent/FI78768C/fi not_active IP Right Cessation
• 1988
  • 1988-05-16 WO PCT/FI1988/000073 patent/WO1988009431A1/en unknown
  • 1988-05-27 CN CN198888103286A patent/CN88103286A/zh active Pending
  • 1988-05-27 ES ES8801680A patent/ES2011337A6/es not_active Expired - Fee Related

Patent Citations (5)

Non-Patent Citations (1)

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