GB2476852A - Variable inlet valve actuation arrangement for a six-stroke IC engine - Google Patents

Variable inlet valve actuation arrangement for a six-stroke IC engine Download PDF

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Publication number
GB2476852A
GB2476852A GB1015469A GB201015469A GB2476852A GB 2476852 A GB2476852 A GB 2476852A GB 1015469 A GB1015469 A GB 1015469A GB 201015469 A GB201015469 A GB 201015469A GB 2476852 A GB2476852 A GB 2476852A
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GB
United Kingdom
Prior art keywords
air
engine
inlet
cam
inlet valve
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Granted
Application number
GB1015469A
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GB2476852B (en
GB201015469D0 (en
Inventor
Anthony Edgar Blackburn
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Individual
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Individual
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Priority to GB1015469.8A priority Critical patent/GB2476852B/en
Publication of GB201015469D0 publication Critical patent/GB201015469D0/en
Publication of GB2476852A publication Critical patent/GB2476852A/en
Priority to PCT/GB2011/001195 priority patent/WO2012035285A1/en
Application granted granted Critical
Publication of GB2476852B publication Critical patent/GB2476852B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • 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
    • F01L1/36—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle
    • F01L1/38—Valve-gear or valve arrangements, e.g. lift-valve gear peculiar to machines or engines of specific type other than four-stroke cycle for engines with other than four-stroke cycle, e.g. with two-stroke cycle
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/14—Tappets; Push rods
    • F01L1/146—Push-rods
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/181—Centre pivot rocking arms
    • F01L1/182—Centre pivot rocking arms the rocking arm being pivoted about an individual fulcrum, i.e. not about a common shaft
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L1/185—Overhead end-pivot rocking arms
    • 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
    • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
    • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
    • F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
    • F02D13/0223—Variable control of the intake valves only
    • F02D13/0226—Variable control of the intake valves only changing valve lift or valve lift and timing
    • 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
    • F01L1/20—Adjusting or compensating clearance
    • F01L1/22—Adjusting or compensating clearance automatically, e.g. mechanically
    • F01L1/24—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically
    • F01L1/2405—Adjusting or compensating clearance automatically, e.g. mechanically by fluid means, e.g. hydraulically by means of a hydraulic adjusting device located between the cylinder head and rocker arm
    • 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/047—Camshafts
    • F01L1/053—Camshafts overhead type
    • F01L2001/0537—Double overhead camshafts [DOHC]
    • 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
    • F01L1/12—Transmitting gear between valve drive and valve
    • F01L1/18—Rocking arms or levers
    • F01L2001/188—Fulcrums at upper surface
    • 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
    • F01L2303/00—Manufacturing of components used in valve arrangements
    • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution
    • 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
    • F01L2800/00—Methods of operation using a variable valve timing mechanism
    • F01L2800/13—Throttleless
    • 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
    • F02B75/021—Engines characterised by their cycles, e.g. six-stroke having six or more strokes per cycle
    • 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

Abstract

A Six Stroke internal combustion engine has the following strokes :- Variable fuel/air induction, Compression, Power, Exhaust, Maximised 'air only' induction, and 'Air only' exhaust; and further comprises an inlet cam 6 which opens inlet valve 13 fully via lever 7 for the alternate 'air only' inductions. The travel for the next induction through inlet valve 13 is varied by variable fulcrum 10 acting on rocker 8 via push rod 11. This gives controllable fuel/air inductions without the need for a throttle. Rocker 8 is located in position by link 9. Inlet and exhaust cams are driven at 1/3 crankshaft speed. The inlet valve opens twice with one cam form and one revolution, while the exhaust cam 12 has two lobes to open the exhaust valves twice with one revolution. One or more inlet valves are used per cylinder. Fuel is injected directly into the cylinder as required for the fuel/air inductions, or alternatively may be via port injection.

Description

SIX STROKE BLACKBURN CYCLE' ENGINE
BACKGROUND
Blackburn Cycle' engines have air only' inductions between usual fuel/air combustion cycles and aim to increase the fuel efficiency and reduce the C02 emissions from internal combustion engines particularly when used at low loads.
Previous versions of the Blackburn Cycle' had 8 strokes as follows:-1 Fuel/air induction, 2 Compression, 3 Power, 4 Exhaust, 5 Air only' induction, 6 Air only' compression, 7 Air only' expansion, 8 Air only' exhaust. This leaves a residue of air only' to be mixed with the fresh fuel/air induction. An ideal explosive charge is created free from exhaust gas which increases fuel efficiency. The cycle also reduces the charge temperature at the start of the cycle, increases the combustion temperature and pressure and gives other advantages. This 8 stroke cycle is easily changed to a usual 4 stroke cycle when high power is needed.
Combustion conditions can also be improved with the present invention by introducing air only' induction and exhaust strokes between usual 4 stroke cycles making a Six Stroke Blackburn Cycle'. However, it is more difficult, but not impossible, to change this cycle to 4 stroke for high power.
DESCRIPTION
There is provided a Blackburn Cycle' internal combustion engine where air only' inductions occur between usual fuel/air 4 stroke cycles to create the following cycle:- 1 Variable fuel/air induction depending on the engine power required, 2 Compression, 3 Power, 4 Exhaust, 5 Maximised air only' induction, 6 Air only' exhaust, the cycle then repeats for each cylinder, one inlet cam opens an inlet valve, via a variable mechanism, for a variable fuel/air induction then the same cam opens the same inlet valve fully for a maximised air only' induction as strokeS above.
A power control shaft contains a variable fulcrum, with hydraulic adjustment, which acts on a rocker to transfer motion from a cam to an inlet valve, so as to vary the inlet valve opening for fuel/air inductions according to the engine power required. This rocker is located by a link, or other means, which is attached to the cylinder head.
An inlet valve opens twice with one rotation of one cam form on the inlet camshaft using two separate cam followers and linkages to the same inlet valve. The inlet and exhaust camshafts are driven at 1/3 crankshaft speed and each inlet cam open period is approximately 80 degrees of camshaft rotation. The inlet cam followers are set at approximately 120 degrees to each other relative to the camshaft centre.
The exhaust camshaft has two lobes, spaced at approximately 120 degrees, which opens an exhaust valve twice with one camshaft rotation and one cam follower. Fuel is injected directly into the engine cylinder with no fuel injection for the air only' inductions. Other mechanisms, not shown here, can use one camshaft for operating both inlet and exhaust valves. Port fuel injection is an alternative.
1080 degrees of crankshaft rotation are needed to complete the 6 stroke cycle on a single cylinder engine, 2 cylinders need 540 degrees of crankshaft rotation for equally spaced combustions, 3 cylinder 360 degrees, 4 cylinder 270 degrees, S cylinders 216 degrees and 6 cylinder 180 degrees etc. Separate hydraulic adjustment is shown for the maximised air only' induction rocker and the exhaust rocker. A spring 15 prevents the variable rockerS moving when the inlet valve is opened by lower rocker 7.
A Blackburn Cycle' engine also uses a variable inlet valve mechanism as figures 1:2 and 2:2 which is used to convert a 2 stroke cycle to a 4 stroke cycle with alternate air only' 2 stroke cycles between fuel/air 2 stroke cycles, when less than half load is needed. The inlet camshaft is then driven at 1:2 crankshaft speed and the exhaust camshaft at crankshaft speed, each with single cam lobes.
DESCRIPTION OF THE DRAWINGS
Figure 1:2 combines features of Blackburn Cycle' 8 stroke patents GB 2445415 and GB 2451448, while figure 2:2 modifies this layout to suit the current Six Stroke Blackburn Cycle' patent.
Figure 1:2 shows a section through the nearest cam. Piston 1 is shown in cylinder 2 which is closed by cylinder head 3 which houses permanently engaged inlet valve lever 7 which maximises the air only' inductions. Camshaft 6, driven at 1:4 crankshaft speed, has a cam profile which opens the inlet valve 13 in inlet port 4 via lever 7. As camshaft 6 rotates further at 1:4 crankshaft speed, variable rocker 8 is moved by cam 6. Rocker 8 is located in position by link 9 which is fixed to the cylinder head 3. Variable fulcrum 10 is rotated a few degrees clockwise to increase the travel of inlet valve 13, or rotated a few degrees anticlockwise to reduce the opening of inlet valve 13. This eliminates the need for a throttle. The movement of rocker 8 is relayed to inlet valve 13 via pushrod 11 and a socket on lever 7. Fuel injection 14 is directly into the cylinder when required but no fuel injection for the air only' inductions. Spring 15 prevents variable rocker 8 moving as lever 7 opens an inlet valve.
Figure 2:2 shows a section through the nearest cam for the current Six Stroke Blackburn Cycle' engine. The component parts are numbered as figure 1:2 above but have the following changes. Inlet cam 6 and exhaust cam 12 are both driven at 1:3 crankshaft speed. Exhaust cam 12 has two lobes which are set at approximately 120 degrees to each other while inlet cam 6 has one cam lobe but the fixed travel and variable travel cam followers are set at approximately 120 degrees to each other relative to the camshaft centre. The version for the current patent as figure 2:2 has no need for a throttle as the fuellair intake can be varied by variable fulcrum 10, which is linked directly to an accelerator pedal or operated by a servo. This layout permits one, two or more inlet and exhaust valves per cylinder which is suitable for maximising the power/litre of engine capacity. Fuel injection 14 for this layout is directly into the cylinder when required. There is no fuel injection for the air only' inductions strokes.

Claims (6)

  1. CLAIMS1 There is provided a Blackburn Cycle' internal combustion engine where air only' inductions occur between usual fuel/air combustion cycles to create the following cycle 1 Variable fuel/air induction depending on the engine power required, 2 Compression, 3 Power, 4 Exhaust, 5 Maximised air only' induction, 6 Air only' exhaust, the cycle then repeats for each cylinder, one inlet cam opens an inlet valve, via a variable mechanism, for a variable fuel/air induction then the same cam opens the same inlet valve fully for a maximised air only' induction as stroke 5 above.
  2. 2 A Blackburn Cycle' engine as claimed in claim I where a variable fulcrum acts on a rocker, which transfers motion from a cam to an inlet valve, so as to vary the inlet valve opening for fuel/air inductions according to the engine power required.
  3. 3 A Blackburn Cycle' engine as claimed in claim 1 where an inlet valve opens twice with one rotation of the inlet camshaft using separate cam followers and linkages to the same inlet valve.
  4. 4 A Blackburn Cycle' engine as claimed in claim 1 where the inlet and exhaust camshafts are driven at 1/3 crankshaft speed.
  5. A Blackburn Cycle' engine as claimed in claim I where each inlet cam open period is approximately 80 degrees of camshaft rotation.
  6. 6 A Blackburn Cycle' engine as claimed in claim I where the separate inlet cam followers for the variable fuel/air and maximised air only' inductions are spaced at approximately 120 degrees relative to the camshaft centre 7 A Blackburn Cycle' engine as claimed in claim 1 where the exhaust cam has two lobes, spaced at approximately 120 degrees, relative to the camshaft centre, which opens an exhaust valve twice with one camshaft rotation and one cam follower.8 A Blackburn Cycle' engine as claimed in claim 1 where fuel is injected directly into the engine cylinder.9 A Blackburn Cycle' engine as claimed in claim I where 1080 degrees of crankshaft rotation are needed to complete the 6 stroke cycle on a single cylinder engine.A Blackburn Cycle' engine as claimed in claim 1 where evenly spaced firing intervals on a 2 cylinder engine are at 540 degrees of crankshaft rotation, 3 cylinder 360 degrees, 4 cylinder 270 degrees, 5 cylinders 216 degrees and 6 cylinder 180 degrees etc. 11 A Blackburn Cycle' engine as claimed in claim 1 where automatic valve adjustment is provided in the form of an oil filled chamber fitted with a non return oil valve and a piston for the variable travel fuel/air induction rocker and separate hydraulic adjustment for the maximised air only' induction rocker.12 A Blackburn Cycle' engine as claimed in claim 1 where a spring prevents the fuel/air variable rocker moving when the air only' rocker opens an inlet valve.13 A Blackburn Cycle' engine with a variable inlet valve mechanism as figures 1:2 and 2:2 which is used to convert a 2 stroke cycle engine to a 4 stroke cycle with alternate air only' 2 stroke cycles between fuel/air 2 stroke cycles, when less than half load is needed, the inlet camshaft is driven at 1:2 crankshaft speed and the exhaust camshaft at crankshaft speed, each with single cam lobes.14 A Blackburn Cycle' engine as claimed in claim 1 where the rotation of the variable fulcrum is linked directly to an accelerator pedal or operated by a servo with or without electronic control.An engine as described and as shown in figures 1:2 and 2:2.Amendments to the claims have been filed as followsCLAIMS1 A six stroke engine comprising the following strokes, variable air or fuel/air induction, compression, power, exhaust, maximised air only induction, and air only exhaust; and further comprising at least one inlet valve, an inlet cam with a single lobe to open each inlet valve, and a variable valve mechanism to control air or fuellair induction on the first stroke, wherein the same single cam lobe opens the same inlet valve for air only induction on the fifth stroke.2 An engine as claimed in claim 1 where a variable fulcrum acts on a rocker, which transfers motion from a cam to an inlet valve, so as to vaiy the inlet valve opening for air or fuel/air inductions according to the engine power required.3 An engine as claimed in claim 1 where an inlet valve opens twice with one rotation of the inlet camshaft using separate cam followers and linkages to the same inlet valve.4 An engine as claimed in claim 1 where the inlet and exhaust camshafts are driven at 1/3 crankshaft speed.An engine as claimed in claim 1 where each inlet cam open period is approximately 80 degrees of camshaft rotation.6 An engine as claimed in claim 1 where the separate inlet cam followers for the variable air or fuel/air and maximised air only' inductions are spaced at approximately 120 degrees relative to the camshaft centre I: 7 An engine as claimed in claim! where the exhaust cam has two lobes, spaced at * : * approximately 120 degrees, relative to the camshaft centre, which opens an exhaust valve twice with one camshaft rotation and one cam follower. * * * * * * ** * S * S. S. S * . *5
GB1015469.8A 2010-09-16 2010-09-16 Six stroke 'Blackburn Cycle' Expired - Fee Related GB2476852B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB1015469.8A GB2476852B (en) 2010-09-16 2010-09-16 Six stroke 'Blackburn Cycle'
PCT/GB2011/001195 WO2012035285A1 (en) 2010-09-16 2011-08-10 Six stroke 'blackburn cycle' engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1015469.8A GB2476852B (en) 2010-09-16 2010-09-16 Six stroke 'Blackburn Cycle'

Publications (3)

Publication Number Publication Date
GB201015469D0 GB201015469D0 (en) 2010-10-27
GB2476852A true GB2476852A (en) 2011-07-13
GB2476852B GB2476852B (en) 2012-01-11

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WO (1) WO2012035285A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140060482A1 (en) * 2012-09-01 2014-03-06 Anthony Edgar Blackburn Six Stroke 'Blackburn Cycle' Engine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140326202A1 (en) * 2013-07-26 2014-11-06 Robert E. Wagner Six Stroke Internal Combustion Engine and a Method of Operation

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563770A (en) * 1977-09-24 1980-04-02 Mezaki S Internal combustion engine operating cycles
US4484546A (en) * 1981-10-13 1984-11-27 Investment Rarities, Incorporated Variable valve operating mechanism for internal combustion engines
JPS62195424A (en) * 1986-02-22 1987-08-28 Hiromichi Namikoshi Internal combustion engine for controlling output by controlling intake valve
GB2210666A (en) * 1987-10-07 1989-06-14 Honda Motor Co Ltd Six-stroke engine
WO1995008051A1 (en) * 1993-09-15 1995-03-23 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
WO1996016253A1 (en) * 1994-11-23 1996-05-30 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
GB2366326A (en) * 2000-08-29 2002-03-06 Gary John Knight Six-stroke cycle for internal combustion engines
GB2445415A (en) * 2007-01-05 2008-07-09 Anthony Edgar Blackburn Inlet valve actuation arrangement for an 8-stroke and 4-stroke cycle change IC engine
GB2451448A (en) * 2007-07-28 2009-02-04 Anthony Edgar Blackburn Variable fulcrum position for inlet valve actuation in 8-stroke engines

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US2535532A (en) * 1941-09-24 1950-12-26 Onera (Off Nat Aerospatiale) Two-cycle low-boiling fuel injection engine
JP2004108319A (en) * 2002-09-20 2004-04-08 Nissan Diesel Motor Co Ltd Internal combustion engine
JP2007303348A (en) * 2006-05-10 2007-11-22 Toyota Motor Corp Control device for internal combustion engine
WO2009011145A1 (en) * 2007-07-16 2009-01-22 Joho Corporation System for varying total valve opening angle by variable lift

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1563770A (en) * 1977-09-24 1980-04-02 Mezaki S Internal combustion engine operating cycles
US4484546A (en) * 1981-10-13 1984-11-27 Investment Rarities, Incorporated Variable valve operating mechanism for internal combustion engines
JPS62195424A (en) * 1986-02-22 1987-08-28 Hiromichi Namikoshi Internal combustion engine for controlling output by controlling intake valve
GB2210666A (en) * 1987-10-07 1989-06-14 Honda Motor Co Ltd Six-stroke engine
WO1995008051A1 (en) * 1993-09-15 1995-03-23 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
WO1996016253A1 (en) * 1994-11-23 1996-05-30 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine
GB2366326A (en) * 2000-08-29 2002-03-06 Gary John Knight Six-stroke cycle for internal combustion engines
GB2445415A (en) * 2007-01-05 2008-07-09 Anthony Edgar Blackburn Inlet valve actuation arrangement for an 8-stroke and 4-stroke cycle change IC engine
GB2451448A (en) * 2007-07-28 2009-02-04 Anthony Edgar Blackburn Variable fulcrum position for inlet valve actuation in 8-stroke engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140060482A1 (en) * 2012-09-01 2014-03-06 Anthony Edgar Blackburn Six Stroke 'Blackburn Cycle' Engine

Also Published As

Publication number Publication date
WO2012035285A1 (en) 2012-03-22
GB2476852B (en) 2012-01-11
GB201015469D0 (en) 2010-10-27

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160916