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GB2361031A - Multifunction valve i.c. piston engine - Google Patents

Multifunction valve i.c. piston engine Download PDF

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Publication number
GB2361031A
GB2361031A GB0008385A GB0008385A GB2361031A GB 2361031 A GB2361031 A GB 2361031A GB 0008385 A GB0008385 A GB 0008385A GB 0008385 A GB0008385 A GB 0008385A GB 2361031 A GB2361031 A GB 2361031A
Authority
GB
United Kingdom
Prior art keywords
valve
valves
exhaust
inlet
auxiliary
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.)
Withdrawn
Application number
GB0008385A
Other versions
GB0008385D0 (en
Inventor
Tomas Teixeira
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0008385A priority Critical patent/GB2361031A/en
Publication of GB0008385D0 publication Critical patent/GB0008385D0/en
Publication of GB2361031A publication Critical patent/GB2361031A/en
Withdrawn legal-status Critical Current

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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
    • F02B75/00—Other engines
    • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/28—Valve-gear or valve arrangements, e.g. lift-valve gear characterised by the provision of coaxial valves; characterised by the provision of valves co-operating with both intake and exhaust ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
    • F01L1/44—Multiple-valve gear or arrangements, not provided for in preceding subgroups, e.g. with lift and different valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
    • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
    • F01L13/0005—Deactivating valves
    • 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
    • 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
    • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
    • F02B2075/027—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle four

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

A four-stroke i.e. piston engine has a multifunction valve system to improve gas flow and power. A main valve, which may be single valve as shown in fig.2B or multiple valves as shown in fig.2A, performs both inlet and exhaust functions. Auxiliary inlet and exhaust valves are provided to control flow between the main valve and the inlet pipe and exhaust system, respectively. The main and auxiliary valves may be actuated mechanically, electromechanically or by fluid pressure. The auxiliary valves may be of the poppet, rotary, butterfly or reed type. The valve arrangement may be used to deactivate a cylinder, for engine braking or to use some cylinders as air compressors. An engine with more than one main valve may be changed from multifunction valve mode to conventional valve mode by closing an optional slide valve to separate the exhaust pipe from the inlet pipe, fig.8.

Description

2361031 MULTIFUNCTION VALVE ENGINE This invention relates to a four stroke
internal combustion piston engine fitted with multifunction valve or valves.
Four stroke internal combustion engines are currently fitted with inlet valve or valves and exhaust valve or valves. In present day engines, the function of the inlet valve is restricted to control the flow of the fresh mixture into the cylinder, while the function of the exhaust valve is controlling the flow of spent combustion gases from the cylinder to the exhaust system. In order to maximise power it is desirable to have the largest possible opening area for the entrance of air or combustion mixture and the same holds true for the exhaust of the spent gases. A possible way of increasing this area is to use more valves per cylinder. The present practical limit lies between 4 and 6 valves per cylinder depending on the type or size of the engine involved. This barrier can be overcome through a new philosophy or idea of an invention as is described below.
According to this invention a dramatic increase in the inlet area and the exhaust area is provided. The new idea or philosophy is that of sharing the function of inlet and exhaust by the same valve or valves employed to close and open the combustion chamber. In other words, the same valve or valves fitted to a cylinder head in the combustion chamber perform both the functions of inlet and exhaust.
This invention is applicable to spark ignition (Otto cycle) as well as compression ignition engines (Diesel cycle), using any of the currently known and applied fuels and combustion systems, of all known applications and cylinder arrangements, etc.
To further explain, the present invention makes use of the same valve or valves fitted to a cylinder head in the combustion chamber, for the passage of exhaust gases, and subsequently makes use of the same valve or valves for the passage of inlet gases.
The number of these valves can vary between 1 to 6 or even more if they can be safely fitted. Hereinafter said valve or valves shall be referred to as the main valve, even if represented by an assembly of several valves. The improvement of air flow through an engine with this arrangement results in a considerable increase in power.
in order to accomplish this we need two more types of valves (for low pressure).
First type: one or more valves for the inlet pipe referred to hereinafter as the auxiliary inlet valve.
Second type: one or more valves for the exhaust pipe hereinafter referred to as the auxiliary exhaust valve.
Each type with opening areas ideally equivalent to the opening area of the main valve(s).
The space between the main valve(s) and both auxiliary valves should be kept as small as possible and referred to hereinafter as auxiliary space. The auAi iary inlet valve controls the flow of gases from the inlet pipe to the auxiliary space. The auxiliary exhaust valve controls the flow from the auxiliary space to the exhaust system.
Actuation of the main valve(s) and the auxiliary valve as well, shall be obtained by any of the known and usual methods, such as over head cams with hydraulic tappets or mechanical tappets, mechanically adjustable cam followers, push-rods, electromechanical devices, such as are presently being developed by several engine manufacturers, hydraulic actuation, devices which permit the variation of valve timing, etc. Actuation by pressure of the gases can be used for the auxiliary valves in which case said valves would be non-return valves, similar to the valves used in piston air compressors.
To illustrate the main differences between the traditional idea and the new one, see schematic drawing FIG. 1 for current engines and FIG.2a and 2b for the multifunction valve engine.
The two main functions of the main valve(s) are: inlet function and exhaust function. Additional functions such as described below can be added if required:
1- to deactivate one or more operational cylinders by maintaining the main valve closed.
2- to use the engine as a brake by opening andlor closing the main valve at the appropriate moments.
3- using all or part of the cylinders as an air compressor by keeping the main valve permanently open. In the admission stroke auxiliary inlet valve opens and auxiliary exhaust valve closes. In the compression stroke, auxiliary exhaust valve opens, and auxiliary inlet valve closes.
4- for engines with more than one valve per cylinder, the opening of said valves can be restricted to one or more valves in accordance with the engine's air requirements.
5- the engine can be changed from operation as a multifunctional valve engine to the traditional engine mode, by fitting a slide valve in order to separate the exhaust pipe from the inlet pipe in the auxiliary space. FIGS. 7, 8. This feature would only be used at part load.
6- to avoid contact between the main valve and the piston during the end of the exhaust stroke and the beginning of the inlet stroke, it may be necessary to provide partial closing of the main valve(s) at the appropriate moment.
In order to better understand the following functional description, reference will be made to schematic drawing FIGS. 3, 4, 5 and 6 multifunction valve engine.
FIG. 3 Near the end of the power stroke, at the exact moment when the blowdown of the burned contents of the cylinder should start, the main valve and the auxiliary exhaust valve open.
FIG. 4 Near the end of the exhaust stroke, the auxiliary inlet valve opens and an overlapping between the auxiliary valves occurs and scavenging of the auxiliary space takes place. This shall be referred to further on as the overlapping moment.
FIG.5 At the beginning of the inlet stroke the auxiliary exhaust valve closes (remember the main valve is still open).
FIG. 6 At the beginning of the compression stroke the main valve closes. The auxiliary inlet valve may close at any appropriate moment.
During the overlapping moment further scavenging can be obtained by tuning of the inlet and exhaust pipes using any of the current methods, including continually variable pipes. Any kind of ventilation can be used to obtain additional scavenging andlor cooling.
At part load, exhaust gas recirculation (EGR) can be obtained as required by controlling the auxiliary valves.
1 All valves or even a single valve, called main valve(s), fitted to the cylinder head in the combustion chamber of a 4-stroke internal combustion piston engine perform the functions of closing and opening the combustion space in order to control inlet flow as well as exhaust flow in relation to an auxiliary space of relatively low pressure. Flow from the inlet system to the auxiliary space is controlled by one or more auxiliary inlet valves. Flow from the auxiliary space to the exhaust system is controlled by one or more auxiliary exhaust valves.
Scavenging of the auxiliary space can be obtained by tuning of the exhaust and inlet pipes or by using any kind of additional ventilation.
2 As claimed in 1, for compression ignition engines (Diesel engines).
3 As claimed in 1 for spark ignition engine (Otto engines).
4. As claimed in 1, 2 and 3, with any kind of actuating mechanism for the main valve(s), such as mechanical, hydraulic, electromechanical, etc.
As claimed in 1, 2, 3, and 4, with more than one main valve and with mixed functions, i.e. an engine working in a traditional mode (exhaust valve or valves and inlet valve or valves) (when, for instance, in low power demand) and working in the multifunction mode (the main valve in the combustion chamber performs both exhaust and inlet functions) (when in high power demand), provided it has a slide valve in order to separate the exhaust pipe from the inlet pipe. See FIG. 7,8 6 As claimed in 1, 2, 3, 4 and 5 with one or more auxiliary valves per pipe and with any kind of actuating mechanism, such as mechanical, hydraulic, electromechanical, etc., and with any type of valve, such as poppet valve, rotary valve, butterfly valve, pressure-actuated valve, reed-valve, etc.
7 As claimed in 1, 2, 3, 4, 5 and 6, with any kind of fuel injection such as direct injection, indirect injection, common rail, air injection plus fuel, water injection plus fuel or even carburettor etc.
As claimed in 1, 2, 3, 4, 5, 6 and 7, using any liquid, gaseous or solid fuel.
9 As claimed in 1, 2, 3, 4, 5, 6, 7 and 8, using any kind of material for the manufacture of engines.
As claimed in 1, 2, 3, 4, 5, 6, 7, 8 and 9, for engines with any number of cylinders in any disposition, i.e. V cylinders, flat cylinders, in- line cylinders, radial cylinders, parallel cylinders, etc.
11 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10, for engines of any kind of application, i.e. electrical generators, ship engines of any kind, aircraft engines, racing car engines, motorcycle engines, agricultural engines, truck engines, car engines, boat engines, etc.
12 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and 11, with any kind of supercharge applied to inlet flow.
13 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11 and 12, including any device for the recovery of energy from the exhaust pipe gases.
14 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12 and 13, with mechanical, hydraulic andlor electrical devices to permit the variation of valve timing.
As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12 and 13, with no valve in the exhaust pipe or in the inlet pipe. This would be possible when high air pressure is supplied to the inlet pipe.
16 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12 and 13, with one or more valves in the exhaust pipe and no valve in the inlet pipe. This would be possible when high air pressure is supplied to the inlet pipe.
17 As claimed in 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 11, 12 and 13, with one or more valves in the inlet pipe and no valve in the exhaust pipe.
GB0008385A 2000-04-05 2000-04-05 Multifunction valve i.c. piston engine Withdrawn GB2361031A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0008385A GB2361031A (en) 2000-04-05 2000-04-05 Multifunction valve i.c. piston engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0008385A GB2361031A (en) 2000-04-05 2000-04-05 Multifunction valve i.c. piston engine

Publications (2)

Publication Number Publication Date
GB0008385D0 GB0008385D0 (en) 2000-05-24
GB2361031A true GB2361031A (en) 2001-10-10

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ID=9889275

Family Applications (1)

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GB0008385A Withdrawn GB2361031A (en) 2000-04-05 2000-04-05 Multifunction valve i.c. piston engine

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025502C2 (en) * 2004-02-17 2005-08-19 Otto Pruisscher Gas exchange is for four-stroke cycle, internal combustion engine of the Otto or Diesel type and involves a single valve in contact with the combustion chamber
WO2007098195A3 (en) * 2006-02-21 2007-12-27 Sturman Digital Systems Llc Methods and apparatus to use engine valves as both intake and exhaust valves
CN102042138A (en) * 2010-12-31 2011-05-04 潍柴动力股份有限公司 Running vehicle and internal-combustion engine inflation system and method thereof
CN102052151A (en) * 2010-12-31 2011-05-11 潍柴动力股份有限公司 Running vehicle as well as internal-combustion engine inflation system and method thereof
US20110277711A1 (en) * 2010-05-13 2011-11-17 Gonigman Itzhak Method and system for internal combustion engine
CN103133077A (en) * 2011-11-23 2013-06-05 韩国文 Engine double type auxiliary air valve
CN103174491A (en) * 2013-03-19 2013-06-26 中国北方发动机研究所(天津) Engine auxiliary air interchanger
GB2503745A (en) * 2012-07-06 2014-01-08 Ben Luke Kardoosh Hybrid-valve four stroke engine
CN111120137A (en) * 2019-12-20 2020-05-08 中国北方发动机研究所(天津) Efficient air exchange mechanism of diesel engine
EP4473201A4 (en) * 2023-03-19 2025-10-01 Jay Tran VARIABLE DISPLACEMENT ENGINE

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB339710A (en) * 1929-10-03 1930-12-18 Ernie Adamson Improvements in the valves and cylinder heads of internal combustion engines
GB355812A (en) * 1930-05-29 1931-08-31 Harry Ralph Ricardo Improvements in or relating to internal combustion engines of the liquid fuel injection compression ignition type
GB387058A (en) * 1931-11-07 1933-02-02 Perkins F Ltd Improvements in or relating to the valve mechanism of internal combustion engines
GB565748A (en) * 1943-04-23 1944-11-27 Alfred Boorer Improvements in or relating to valve gear of internal-combustion engines
GB2065762A (en) * 1979-12-04 1981-07-01 Carr R G I.C. engine rotary valve gear
GB2223800A (en) * 1988-07-19 1990-04-18 T & N Technology Ltd I.C. engine valve gear
WO1992014040A1 (en) * 1991-02-07 1992-08-20 Piotr Marszalkiewicz The method of a valve timing of a four-stroke internal combustion engine and the valve timing mechanism device of a four-stroke internal combustion engine
GB2261025A (en) * 1991-10-29 1993-05-05 Malcolm Francis John Beken Four-stroke engine inlet and exhaust valving
GB2267124A (en) * 1992-04-28 1993-11-24 Harry Leslie James Dixon I.c.engine valve gear.

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB339710A (en) * 1929-10-03 1930-12-18 Ernie Adamson Improvements in the valves and cylinder heads of internal combustion engines
GB355812A (en) * 1930-05-29 1931-08-31 Harry Ralph Ricardo Improvements in or relating to internal combustion engines of the liquid fuel injection compression ignition type
GB387058A (en) * 1931-11-07 1933-02-02 Perkins F Ltd Improvements in or relating to the valve mechanism of internal combustion engines
GB565748A (en) * 1943-04-23 1944-11-27 Alfred Boorer Improvements in or relating to valve gear of internal-combustion engines
GB2065762A (en) * 1979-12-04 1981-07-01 Carr R G I.C. engine rotary valve gear
GB2223800A (en) * 1988-07-19 1990-04-18 T & N Technology Ltd I.C. engine valve gear
WO1992014040A1 (en) * 1991-02-07 1992-08-20 Piotr Marszalkiewicz The method of a valve timing of a four-stroke internal combustion engine and the valve timing mechanism device of a four-stroke internal combustion engine
GB2261025A (en) * 1991-10-29 1993-05-05 Malcolm Francis John Beken Four-stroke engine inlet and exhaust valving
GB2267124A (en) * 1992-04-28 1993-11-24 Harry Leslie James Dixon I.c.engine valve gear.

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1025502C2 (en) * 2004-02-17 2005-08-19 Otto Pruisscher Gas exchange is for four-stroke cycle, internal combustion engine of the Otto or Diesel type and involves a single valve in contact with the combustion chamber
WO2007098195A3 (en) * 2006-02-21 2007-12-27 Sturman Digital Systems Llc Methods and apparatus to use engine valves as both intake and exhaust valves
US8607763B2 (en) * 2010-05-13 2013-12-17 Itzhak GONIGMAN Method and system for internal combustion engine
US20110277711A1 (en) * 2010-05-13 2011-11-17 Gonigman Itzhak Method and system for internal combustion engine
CN103003535A (en) * 2010-05-13 2013-03-27 伊扎克·古尼曼 Method and system for internal combustion engine
EP2569518A4 (en) * 2010-05-13 2014-03-19 Itzhak Gonigman Method and system for internal combustion engine
CN102042138A (en) * 2010-12-31 2011-05-04 潍柴动力股份有限公司 Running vehicle and internal-combustion engine inflation system and method thereof
CN102052151A (en) * 2010-12-31 2011-05-11 潍柴动力股份有限公司 Running vehicle as well as internal-combustion engine inflation system and method thereof
CN103133077A (en) * 2011-11-23 2013-06-05 韩国文 Engine double type auxiliary air valve
GB2503745A (en) * 2012-07-06 2014-01-08 Ben Luke Kardoosh Hybrid-valve four stroke engine
CN103174491A (en) * 2013-03-19 2013-06-26 中国北方发动机研究所(天津) Engine auxiliary air interchanger
CN103174491B (en) * 2013-03-19 2016-02-24 中国北方发动机研究所(天津) A kind of engine auxiliary air interchanger
CN111120137A (en) * 2019-12-20 2020-05-08 中国北方发动机研究所(天津) Efficient air exchange mechanism of diesel engine
EP4473201A4 (en) * 2023-03-19 2025-10-01 Jay Tran VARIABLE DISPLACEMENT ENGINE

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Publication number Publication date
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