WO1991005945A1 - An endothermic engine with an otto-cycle and double combustion diesel cycle - Google Patents

An endothermic engine with an otto-cycle and double combustion diesel cycle Download PDF

Info

Publication number
WO1991005945A1
WO1991005945A1 PCT/IT1989/000070 IT8900070W WO9105945A1 WO 1991005945 A1 WO1991005945 A1 WO 1991005945A1 IT 8900070 W IT8900070 W IT 8900070W WO 9105945 A1 WO9105945 A1 WO 9105945A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
gases
air
mixture
tube
Prior art date
Application number
PCT/IT1989/000070
Other languages
French (fr)
Inventor
Gianni Zanieri
Original Assignee
Gianni Zanieri
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 Gianni Zanieri filed Critical Gianni Zanieri
Priority to PCT/IT1989/000070 priority Critical patent/WO1991005945A1/en
Publication of WO1991005945A1 publication Critical patent/WO1991005945A1/en

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
    • F02B41/06—Engines with prolonged expansion in compound cylinders
    • 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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-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

Definitions

  • the present invention concerns an endothermic engine, working with an Otto-cycle and with a diesel-cycle, cha ⁇ racterized in a double combustion.
  • the unburnt hydrocarbons and the carbon monoxide may be recycled because if they are put in an oxygenated ambient they may have a second and com ⁇ plete combustion, with the double advantage of a consi ⁇ derable increase of the total efficiency of the engine and of the nearly total elimination of the polluting components of the exhaust gases.
  • the aim set forth is reached by means of the engine ac ⁇ cording to the present invention, comprising means for the recollection of the gases not completely burnt dur ⁇ ing the explosion in one cylinder, which are sent to a further cylinder which, at the same time, aspires only air or a mixture with a minimum percentage of fuel.
  • Said second cylinder therefore is working only in con ⁇ ditions of overfeeding, because in this phase the first cylinder acts like a pushing pump.
  • the present invention will provide, in the va ⁇ riant of the Diesel-cycle engines, an additional injec ⁇ tion of Diesel oil - not the same quantity of the one present in the first cylinder - having the same purpose that the immission of little fuel percentage mixture as described above for the Otto-cycle.
  • Figure 1 shows a scheme of the coupling of two cylin ⁇ ders, without any variation of the distribu ⁇ tion relative to the first cylinder, with a contemporary aspiration, in the second cylin ⁇ der, of air or thin mixture and burnt gases.
  • Figure 2 shows a scheme of the phases of an engine ac ⁇ cording to the present invention in which fol- lowing to the modification of the distribution of the cylinder for the first combustion, and delaying the opening of the exhaust valve, the aspiration in succession is obtained in.the second cylinder first of the air or eventual thin mixture, and then of the pressurized com ⁇ bustion gases.
  • Figure 3 shows a variant comprising two aspiration val ⁇ ves in the second cylinder, the first being connected with the aspiration box or with a small carburettor, and the second one with the exhaust of the first cylinder.
  • the elbows of the engine shaft, relative to cylinders 1 and 2 are placed at 180°, and the first cylinder 1 aspires, through a tube 4, a mixture of air and fuel; the gases of the first co.bustion pass in the connec ⁇ tion tube 3 and get mixed with pure air or with a thin mixture caming from a tube 5 so as to reach the second cylinder 2 where the second combustion takes place with the final discharge of the gases through tube 6.
  • valve 7 is pre- ferrably provided in tube 7 of the carrying type.
  • the succession of the phases may be described as follows:
  • C The cylinder 2 is compressing the mixture of air and burnt gases, while cylinder 1 aspires a mixture or air to be mixed.
  • two aspiration val- ves are provided in the second cylinder 2 because the a- spiration tube 3 is divided from the connection tube 3, and has the function of sucking the air or the thin mix ⁇ ture.

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  • 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)

Abstract

The engine comprises a connection tube (3) for the recollection of the gases not completely burnt during the explosion in a cylinder (1), and said gases are sent to a further cylinder (2) which at the same time aspires only the air or a mixture with a minimum percentage of fuel. On said tube an intercooler may be provided.

Description

"An endothermic engine with an Otto -cycle and double combustion diesel cycle"
The present invention concerns an endothermic engine, working with an Otto-cycle and with a diesel-cycle, cha¬ racterized in a double combustion.
It is already well known that in the endothermic engines the exhaust gases have a considerable percentage of un- burnt hydrocarbons, beyond carbon monoxide and nitrogen oxides.
Of all said mixtures, the unburnt hydrocarbons and the carbon monoxide may be recycled because if they are put in an oxygenated ambient they may have a second and com¬ plete combustion, with the double advantage of a consi¬ derable increase of the total efficiency of the engine and of the nearly total elimination of the polluting components of the exhaust gases.
It is the aim of the present invention to allow above mentioned double combustion in endothermic engines with fuel or Diesel oil.
The aim set forth is reached by means of the engine ac¬ cording to the present invention, comprising means for the recollection of the gases not completely burnt dur¬ ing the explosion in one cylinder, which are sent to a further cylinder which, at the same time, aspires only air or a mixture with a minimum percentage of fuel.
Said second cylinder therefore is working only in con¬ ditions of overfeeding, because in this phase the first cylinder acts like a pushing pump.
Of course the present invention will provide, in the va¬ riant of the Diesel-cycle engines, an additional injec¬ tion of Diesel oil - not the same quantity of the one present in the first cylinder - having the same purpose that the immission of little fuel percentage mixture as described above for the Otto-cycle.
The present invention will be described more in detail hereinbelow, according to the enclosed drawings.
Figure 1 shows a scheme of the coupling of two cylin¬ ders, without any variation of the distribu¬ tion relative to the first cylinder, with a contemporary aspiration, in the second cylin¬ der, of air or thin mixture and burnt gases.
Figure 2 shows a scheme of the phases of an engine ac¬ cording to the present invention in which fol- lowing to the modification of the distribution of the cylinder for the first combustion, and delaying the opening of the exhaust valve, the aspiration in succession is obtained in.the second cylinder first of the air or eventual thin mixture, and then of the pressurized com¬ bustion gases.
Figure 3 shows a variant comprising two aspiration val¬ ves in the second cylinder, the first being connected with the aspiration box or with a small carburettor, and the second one with the exhaust of the first cylinder.
Relating now to the figures, in all variants the con¬ nection tube 3 between the first cylinder 1 and the se¬ cond cylinder 2 is present.
For what concerns the variant according to figure 1, the elbows of the engine shaft, relative to cylinders 1 and 2, are placed at 180°, and the first cylinder 1 aspires, through a tube 4, a mixture of air and fuel; the gases of the first co.bustion pass in the connec¬ tion tube 3 and get mixed with pure air or with a thin mixture caming from a tube 5 so as to reach the second cylinder 2 where the second combustion takes place with the final discharge of the gases through tube 6.
Relating to the variant of figure 2, a valve 7 is pre- ferrably provided in tube 7 of the carrying type. The succession of the phases may be described as follows:
2 A = the exhaust valve of cylinder 1 opens at about -g of the running up of the piston so as to allow the cy¬ linder 2 to aspire - for about half the run - only pure air or thin mixture from tube 5; in connection tube 3 valve 7 is placed, of the door kind, moved by the pressure of the exhaust gases,and that will prevent the reflow of the exhaust gases into the a- spiration box.
B = All exhaust gases are flown into the second cylinder 2 and are now mixed with the aspired air or thin mixture.
C = The cylinder 2 is compressing the mixture of air and burnt gases, while cylinder 1 aspires a mixture or air to be mixed.
D = Cylinder 1 stops mixing burnt air and gases, while cylinder 1 aspires the mixture.
E = The cylinder 2 explodes while cylinder 1 finishes compressing the mixture.
F = Cylinder 1 explodes while cylinder 2 expells the ga¬ ses burnt twice.
In the variant according to figure 3, two aspiration val- ves are provided in the second cylinder 2 because the a- spiration tube 3 is divided from the connection tube 3, and has the function of sucking the air or the thin mix¬ ture.
The functioning described hereinbefore is similar in the application of the present invention to Diesel-cycle motors with the sole difference that, when performing the second combustion, a diesel oil injection is prov- ided of a minor quantity than the one contained in cy¬ linder 1.

Claims

1. An endothermic engine with Otto- or Diesel-cycle with double combustion, characterized in a connection tube (3) between the first cylinder (1) and the second cy¬ linder (2) for transferring the gases not completely burnt during the explosion in the cylinder (1), and the following mixing thereof with air of thin mixture aspir¬ ed through cylinder (2).
2. An endothermic engine according to claim 1, characte¬ rized in the coupling between said cylinders (1) and (2), without any variation for the distribution of cylinder (1) and with contemporary aspiration inside cylinder (2) of air or thin mixture of gases burnt in such a way that the gases of the first combustion pass in tube (3) and get mixed with pure air or with a thin mixture com¬ ing form tube (5) so as to reach cylinder (2) where the second combustion takes place, with the final exhaust of the gases through tube(6.).
3. An endothermic engine according to claim 1, wherein with the variation of the distribution of the cylinder of the first combustion, and delaying the opening of the exhaust valve, the successively aspiration is ob¬ tained in the second cylinder of air or an eventual thin mixture and then of the gases burnt under pressu- re, characterized in the succession of the following phases:
2 A = the exhaust valve of cylinder (1) opens at about -z- of the running up of the piston so as to allow the cylinder (2) to aspire - for about half the run - only pure air or thin mixture from tube (5); in con¬ nection tube (3) valve (7) is placed, of the door kind, moved by the pressure of the exhaust gases, and that will prevent the reflow of the exhaust ga- ses into the aspiration box;
B = all exhaust gases are flown into the second cylin¬ der (2) and are now mixed with the aspired air or thin mixture; C = the cylinder (2) is compressing the mixture of air and burnt gases, while cylinder (1) aspires a mix¬ ture or air to be mixed; D = cylinder (2) stops mixing burnt air and gases, whi¬ le cylinder (1) aspires the mixture; E = cylinder (2) explodes while cylinder (1) finishes compressing the mixture;
F = cylinder (1) explodes while cylinder (2) expelIs the gases burnt twice.
4. An endothermic engine according to claim 1, characteriz- ed in that it comprises two aspiration valves in cylin- der (2), the first being connected with the aspiration box or with a small carburettor, and the second with the exhaust (3) of the first cylinder.
5. An endothermic engine according to all precedent claims characterized in the presence, in the Diesel-cycle, of an additional immission into cylinder (2) of smaller quantity than the one present in cylinder (1).
PCT/IT1989/000070 1989-10-19 1989-10-19 An endothermic engine with an otto-cycle and double combustion diesel cycle WO1991005945A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT1989/000070 WO1991005945A1 (en) 1989-10-19 1989-10-19 An endothermic engine with an otto-cycle and double combustion diesel cycle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT1989/000070 WO1991005945A1 (en) 1989-10-19 1989-10-19 An endothermic engine with an otto-cycle and double combustion diesel cycle

Publications (1)

Publication Number Publication Date
WO1991005945A1 true WO1991005945A1 (en) 1991-05-02

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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5226401A (en) * 1992-06-01 1993-07-13 Caterpillar Inc. Method and apparatus for exhaust gas recirculation via reverse flow motoring
EP0563456A1 (en) * 1992-04-01 1993-10-06 Tore Gustav Owe Berg Combustion engine of high efficiency
EP1528234A1 (en) * 2003-11-03 2005-05-04 Lung-Tan Hu Eight-stroke internal combustion engine utilizing a slave cylinder
US7096833B2 (en) 2002-02-06 2006-08-29 Mazda Motor Corporation Control device for supercharged engine
FR2926324A1 (en) * 2008-01-10 2009-07-17 Jean Joseph Seel Dual cylinder expansion petrol or oil engine for e.g. motorcycle, has expansion valve rejecting air during raising of piston in dual cylinder, where rejected air is recovered and stored so as to be restored during following air intake phase

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110248A (en) * 1934-10-17 1938-03-08 Vaughn A Bradley Synchro-cross-expansion engine
GB593067A (en) * 1945-06-13 1947-10-07 Thomas Hamilton Adams Improvements in or relating to compound compression-ignition internal combustion engines
US3958540A (en) * 1974-07-05 1976-05-25 General Motors Corporation Staged internal combustion engine with interstage temperature control
US4321892A (en) * 1976-03-19 1982-03-30 Anger Robert M Multiple-cycle, piston-type internal combustion engine
BE892065A (en) * 1982-02-09 1982-05-27 Gijbels Peter H PISTON ENGINE WITH CONSTANTLY LASTING COMBUSTION AREA
GB2136049A (en) * 1983-02-22 1984-09-12 Leonard Louis Henderson A Dual Combustion Compound Gas and Thermal Engine
JPS61210231A (en) * 1985-03-14 1986-09-18 Sunao Warigai Crank coupling mechanism of double cylinder type engine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2110248A (en) * 1934-10-17 1938-03-08 Vaughn A Bradley Synchro-cross-expansion engine
GB593067A (en) * 1945-06-13 1947-10-07 Thomas Hamilton Adams Improvements in or relating to compound compression-ignition internal combustion engines
US3958540A (en) * 1974-07-05 1976-05-25 General Motors Corporation Staged internal combustion engine with interstage temperature control
US4321892A (en) * 1976-03-19 1982-03-30 Anger Robert M Multiple-cycle, piston-type internal combustion engine
BE892065A (en) * 1982-02-09 1982-05-27 Gijbels Peter H PISTON ENGINE WITH CONSTANTLY LASTING COMBUSTION AREA
GB2136049A (en) * 1983-02-22 1984-09-12 Leonard Louis Henderson A Dual Combustion Compound Gas and Thermal Engine
JPS61210231A (en) * 1985-03-14 1986-09-18 Sunao Warigai Crank coupling mechanism of double cylinder type engine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 11, no. 48 (M-561)(2495) 13 February 1987, & JP-A-61 210231 (SUNAO WARIGAI) 18 September 1986, see the whole document *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0563456A1 (en) * 1992-04-01 1993-10-06 Tore Gustav Owe Berg Combustion engine of high efficiency
US5226401A (en) * 1992-06-01 1993-07-13 Caterpillar Inc. Method and apparatus for exhaust gas recirculation via reverse flow motoring
US7096833B2 (en) 2002-02-06 2006-08-29 Mazda Motor Corporation Control device for supercharged engine
EP1528234A1 (en) * 2003-11-03 2005-05-04 Lung-Tan Hu Eight-stroke internal combustion engine utilizing a slave cylinder
FR2926324A1 (en) * 2008-01-10 2009-07-17 Jean Joseph Seel Dual cylinder expansion petrol or oil engine for e.g. motorcycle, has expansion valve rejecting air during raising of piston in dual cylinder, where rejected air is recovered and stored so as to be restored during following air intake phase

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