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GB2451448A - Variable fulcrum position for inlet valve actuation in 8-stroke engines - Google Patents

Variable fulcrum position for inlet valve actuation in 8-stroke engines Download PDF

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Publication number
GB2451448A
GB2451448A GB0714772A GB0714772A GB2451448A GB 2451448 A GB2451448 A GB 2451448A GB 0714772 A GB0714772 A GB 0714772A GB 0714772 A GB0714772 A GB 0714772A GB 2451448 A GB2451448 A GB 2451448A
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United Kingdom
Prior art keywords
engine
valve
inlet valve
cam
inlet
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.)
Granted
Application number
GB0714772A
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GB0714772D0 (en
GB2451448B (en
Inventor
Anthony Edgar Blackburn
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Individual
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Filing date
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Priority to GB0714772A priority Critical patent/GB2451448B/en
Publication of GB0714772D0 publication Critical patent/GB0714772D0/en
Publication of GB2451448A publication Critical patent/GB2451448A/en
Application granted granted Critical
Publication of GB2451448B publication Critical patent/GB2451448B/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
    • F01L1/20—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
    • F01L1/12—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
    • F01L1/36—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
    • 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
    • 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
    • F02B69/06—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 cycles, e.g. convertible from two-stroke to four 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
    • F01L1/02—Valve drive
    • F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
    • F01L1/08—Shape of cams
    • 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
    • F01L2001/0535—Single overhead camshafts [SOHC]
    • 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
    • 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
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

An 8 stroke and 4 stroke cycle change, Cool Charge or Blackburn cycle engine where the opening travel of an inlet valve 2 is variable due to a variable fulcrum position on a lever, rocker or link 4 transmitting motion from a cam 3 to an inlet valve 2 eliminating the need for a throttle. The fulcrum 5 may be moved by a rod 6. A locater 7 may engage a groove in the rocker 4 to prevent the rocker from moving out of position. The 8 stroke mode requires a camshaft driven at one-quarter crankshaft speed and two alternate opening inlet valves for each cylinder to admit alternate 'air only' inductions between fuel/air inductions. A bar or link is movable to connect both inlet valves, rockers or levers so that both inlet valves open together for maximum power in 4 stroke mode. Hydraulic valve clearance adjustment is provided within the fulcrum.

Description

VARIABLE FULCRUM POSITION FOR BLACKBURN CYCLE
8 STROKE ENGINES
Background
This invention describes improved valve gear for piston engines.
The power output from petrol engines is usually controlled by a throttle which is some distance from the combustion chamber. There is a relatively large volume of air between the throttle and the combustion chamber. This is unhelpful in particular conditions and can cause a high idling speed. This was a problem in Blackburn Cycle, 8 Stroke and 4 Stroke cycle change or Cool Charge' engines as patent number EP 0578637 and related patents. In 8 Stroke mode air only' remained in the cylinder head at the end of the air only' exhaust stroke. This was approximately 10% of the swept volume. If the volume in the inlet pipe between the throttle and the inlet valve seat is also 10%, then even if the throttle is nearly closed, the cylinder is nearly 20% full for the next combustion. This gave too much power and caused a high idling speed and wasted fuel.
The present invention eliminates the need for a throttle valve by varying the opening of the inlet valve itself to control the quantity of fuel/air entering the engine cylinder and hence the power output. A lower power and idling speed can then be achieved. A smaller opening of the inlet valve for low power also increases the fuel/air speed as it enters the cylinder, causing more turbulence with better mixing and improved combustion.
Other features of this invention include automatic valve adjustment and provision to connect adjacent inlet valves to change the valve operation under certain conditions.
DESCRIPTION
001 There is provided an 8 stroke and 4 stroke internal combustion engine or Blackburn Cycle engine with at least one inlet valve in an engine cylinder where the opening travel of an inlet valve can be varied by means of a variable fulcrum position on a kver or rocker transferring motion from a cam to an inlet valve.
002 A control moves the fulcrum towards the cam to increases the opening travel of the inlet valve, allowing more fuel andlor air to enter the cylinder. Similarly, the control moves the fulcrum towards the inlet valve reducing the fuel/air intake valve opening and the power output.
003 Moving the fulcrum directly above the inlet valve causes the inlet valve to remain closed. The small inlet valve opening for low power increases the speed of the air entering the cylinder during an induction stroke resulting in more turbulence and better fuel/air mixing for more complete and faster combustion.
004 A locater prevents the rocker or lever from moving out of position in both a sideways, rotational or fore and aft direction while allowing a full range of inlet valve travel from fully closed to fully open. The locater takes the form of a rectangular peg engaged within a rectangular slot in the rocker or lever with suitable clearance. The locater peg or the slot in the rocker may also be curved to reduce the clearance and noise.
Combined with the fulcrum, is automatic valve clearance adjustment. Oil is fed to a chamber within the fulcrum which is fitted with a non return valve so that oil can not escape when the inlet valve is opened exerting increased oil pressure within the adjusting chamber. Small valve clearances are thus maintained as components wear.
The surfaces of the rocker top and the inside of the valve cover are generally parallel when the inlet valve is closed.
006 The fulcrum position can be directly controlled by the accelerator position.
Alternatively the fulcrum position can be controlled by a servo, relay or other means influenced by the accelerator pedal position, the atmospheric conditions, engine, water and oil temperature, driver preferences and a computer.
007 For a further feature a connecting bar or other device associated with one rocker can be moved by a selector, changed oil pressure or other means, to engage with the adjacent rocker or valve for the same cylinder, so that the cam which opens one inlet valve, then also opens the adjacent inlet valve(s). When the connecting device is engaged both inlet valves open for the same inlet stroke. This increases the total valve opening area and the maximum power output.
008 A retuin spring disengages the connecting device, for lower power, to allow only one inlet valve to open for alternate inlet strokes giving the fuel efficient 8 Stroke or Blackburn Cycle with alternate air only' induction strokes. Many methods can be used to connect adjacent levers, rockers or valves in addition to the connecting bar described above and shown in figure Ill.
009 The cam follower is convex or radiused. The cam form itself is concave at the point where the inlet valve starts to open and where it ends closing. There are usually two separate inlet ports each with its own inlet valve per cylinder operated by a camshaft driven at � crankshaft speed, where the inlet cams are effectively on opposite sides of the camshaft. The inlet cams open and close the inlet valve in approximately 60 degrees rotation of the cam. An odd number of cylinders is needed to give evenly spaced firing impulses under all valve operating conditions.
In 4 stroke mode, above half load, each 4 stroke cycle has fuellair inductions.
Below half load, in 8 Stroke mode, alternate 4 stroke cycles have unthrottled air only inductions. This removes all exhaust gas from the cylinder, cools the next combustion charge, increase the proportion of air and oxygen thus increasing the fuel efficiency. A separate fuel supply is needed for each inlet port or valve which can be controlled and switched on or off as required for a particular power output.
011 It is not essential to have a variable fulcrum for the second air only' inlet valve.
All loads from 0 to 100% can be met by the variable fulcrum of the fuel/air inlet valve. The second air only' inlet valve has its fuel injector turned on or off as needed and does not need a variable fulcrum. However the engine will be smoother if both inlet valves have a variable fulcrum. Then for 60% load, both inlet valves admit 60% fuel/air mixture.
012 The variable fulcrum can also be used on 4 stroke or 2 stroke engines, with or without the automatic valve adjustment or the connecting bar. One or more valves per cylinder can have a variable fulcrum. If the connecting bar feature is used it may be preferable for the cam for inlet valve one to open and close early, for example. The cam for inlet valve two can then open and close relatively late in the cycle. When the two valves are connected, both valves then open early and close late, which is more suitable for high speed and high power. Conversely when the valves are not connected, the opening period is reduced which is more suitable for low power and speed, with improved fuel efficiency.
DESCRIPTION OF FIGURE 1/1.
A piston engine has a cylinder head I with at least one inlet valve 2 where a cam 3 operates a rocker 4. A fulcrum S is movable by a rod 6 towards the cam 3 increasing the inlet valve opening or towards the inlet valve 2 reducing the inlet valve opening.
A locater 7 engages in a groove in the rocker 4 and prevents the rocker 4 from moving out of position. Within the fulcrum 5 an oil chamber 8 has a one way valve 9 held against its seat 10 by a spring (not shown). An oil supply II keeps the chamber 8 topped up to maintain small valve clearances. Side flanges 14 keeps the axis of the fulcrum radius parallel with the camshaft axis. A spring 13 keeps the rocker 4 in contact with the cam 3 when the fulcrum 5 is close to valve 2.
Above the cam 3 in the rocker 4 is a connecting bar 12. A selector (not shown) can move the connector bar 12 to engage in a similar hole in the adjacent rocker (not shown) so that two or more rockers for the cylinder move as one, operated by cam 3 and other cam(s) (not shown). The connecting bar 12 is fitted with a return spring (not shown) so that it disengages from the adjacent rocker when the selector allows and less power is needed. The two adjacent inlet valves then open for alternate inlet strokes allowing an 8 Stroke cycle with alternate air only' inductions through the second inlet valve when the fuel injector for this port is turned off The first inlet valve shown in figure 1/1 with variable opening is used for fuel/air inductions. In 8 Stroke mode, varying the position of the fulcrum gives up to half average load in its maximum opening position, and no load in the fully closed position when the second iniet valve admits air only. When more than half load is needed the fuel injector for the former air only' inlet valve (not shown) is switched on. If 60 % load is needed, for example, the fuel/air valve in figure 1/1 will give 20% power on alternate induction strokes i.e. 10% average load. Then the former air only' second valve will have the fuel injector fully switched on giving 100% load on alternate strokes i.e. 50% average load. 60% overall average load then results over 2 adjacent 4 stroke cycles.

Claims (1)

  1. Claims 1 1 claim a Blackburn Cycle or 8 Stroke and 4 stroke cycle change internal corn bustion engine with at least one inlet valve where the opening travel of said inlet valve can be varied by means of a variable fulcrum position on a lever or rocker transferring motion from a cam to said inlet valve.
    2 An engine as claimed in claim I where the fulcrum may be positioned over the inlet valve so it can remain closed under certain conditions.
    3 An engine as claimed in claim I where the fulcrum position is controlled directly by accelerator pedal position.
    4 An engine as claimed in claim I where the fulcrum position is controlled by a servo or other indirect means influenced by the accelerator position, atmospheric conditions, engine water and oil temperature, driver preferences and a computer.
    An engine as claimed in claim 1 where a locater prevents the rocker from moving out of position but has sufficient clearance to allow a full range of inlet valve travel.
    6 An engine as claimed in claim 5 where the locater peg is generally rectangular in shape engaging in a generally rectangular slot in the rocker.
    7 An engine as claimed in claim 5 where the locater peg or rocker slot has curved sides to reduce clearance and noise.
    8 An engine as claimed in claim 1 where the cam follower is convex at the point where it contacts the cam.
    9 An engine as claimed in claim I where the inlet cam form is locally concave where the cam starts to open and ends closing the valve.
    An engine as claimed in claim I where the inlet valve opens and closes in
    A
    Claims continued approximately 60 degrees of cam rotation 11 An engine as claimed in claim I where a connecting bar or other device can link one inlet valve to adjacent valve(s) so that a cain which opens one inlet valve also opens adjacent valve(s) to increase the total inlet valve area for maximum power.
    12 An engine as claimed in claim 1 where automatic valve adjustment is provided within the fulcrum in the form of an oil pressure filled cylinder fitted with a non return oil valve.
    13 An engine as claimed in claim I where an odd number of cylinders gives smooth running with all valve operating conditions and all variable fulcrum positions for both 4 stroke and 8 Stroke modes.
    14 An engine as claimed in claim 1 where a variable fulcrum power control is used with 4 stroke and 2 stroke engines with or without the connecting feature and automatic valve adjustment.
    An engine as claimed in claim 1 where the camshaft is driven at � crankshaft speed and the inlet cam lobes for two inlet valves in each cylinder are on opposite sides of the camshaft.
    16 A internal combustion engine generally as described and as shown in figure 1/1.
    --
    AMENDED CLAIMS HAVE BEEN FILED AS FOLLOWS
    Claims 1 A Blackburn Cycle internal combustion engine has air only' 4 stroke cycles which alternate with fuel/air 4 stroke cycles in each cylinder caused by alternate opening fuel/air and air only' inlet valves in each cylinder where a lever, which transmits motion from a cam to an inlet valve, is located by a peg and fitted with a dowel which, when moved, connects adjacent inlet valve levers so that a cam which opens one inlet valve also opens the adjacent valve in one cylinder when maximum power is needed, a fulcrum on the fuel/air inlet valve lever is movable to vary this inlet valve opening travel which eliminates the need for a usual throttle.
    2 An engine as claimed in claim I where the fulcrum may be positioned over the inlet valve so it can remain closed under certain conditions.
    3 An engine as claimed in claim 1 where the fulcrum position is controlled directly by the accelerator pedal position. * I.
    4 An engine as claimed in claim I where the fulcrum position is controlled by a servo or other indirect means influenced by the accelerator position, atmospheric conditions, engine water and oil temperature, driver preferences and a computer.
    I
    An engine as claimed in claim 1 where a locater prevents the rocker from moving out of position but has sufficient clearance to allow a full range of inlet valve travel.
    6 An engine as claimed in claim 5 where the locater peg is generally rectangular in shape engaging in a generally rectangular slot in the rocker.
    7 An engine as claimed in claim 5 where the locater peg or rocker slot has curved sides to reduce clearance and noise.
    8 An engine as claimed in claim 1 where the cam follower is convex at the point where it contacts the cam.
    9 An engine as claimed in claim I where the inlet cam form is locally concave where the cam starts to open and ends closing the valve.
    An engine as claimed in claim 1 where the inlet valve opens and closes in approximately 60 degrees of cam rotation 11 An engine as claimed in claim I where a connecting dowel or other device links one inlet valve lever to the adjacent valve lever in one cylinder so that a cam which opens one inlet valve also opens adjacent valve(s) to increase the total inlet valve area for maximum power.
    12 An engine as claimed in claim I where automatic valve adjustment is pmvided within the fulcrum in the form of an oil pressure filled cylinder fitted with a non return oil valve. * Sb
    :::::: 13 An engine as claimed in claim 1 where an odd number of cylinders gives smooth running with all valve operating conditions and all variable fulcrum positions for both . 4 stroke and 8 Stroke modes.
    S S..
    S
    14 An engine as claimed in claim 1 where the camshaft is driven at � crankshaft speed and the inlet cam lobes for two inlet valves in each cylinder are on opposite sides of the camshaft.
    A internal combustion engine generally as described and as shown in figure 1/1.
GB0714772A 2007-07-28 2007-07-28 Blackburn cycle engine valve gear Expired - Fee Related GB2451448B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0714772A GB2451448B (en) 2007-07-28 2007-07-28 Blackburn cycle engine valve gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0714772A GB2451448B (en) 2007-07-28 2007-07-28 Blackburn cycle engine valve gear

Publications (3)

Publication Number Publication Date
GB0714772D0 GB0714772D0 (en) 2007-09-05
GB2451448A true GB2451448A (en) 2009-02-04
GB2451448B GB2451448B (en) 2009-06-17

Family

ID=38513062

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0714772A Expired - Fee Related GB2451448B (en) 2007-07-28 2007-07-28 Blackburn cycle engine valve gear

Country Status (1)

Country Link
GB (1) GB2451448B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2476852A (en) * 2010-09-16 2011-07-13 Anthony Edgar Blackburn Variable inlet valve actuation arrangement for a six-stroke IC engine
CN102877908A (en) * 2011-10-03 2013-01-16 摩尔动力(北京)技术股份有限公司 Short rod air distribution mechanism
CN104775866A (en) * 2015-03-09 2015-07-15 常州嵘驰发动机技术有限公司 Driving device for suction and exhaust valve of internal combustion engine
AT521670A1 (en) * 2018-09-03 2020-03-15 Avl List Gmbh VARIABLE VALVE DRIVE DEVICE

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195424A (en) * 1986-02-22 1987-08-28 Hiromichi Namikoshi Internal combustion engine for controlling output by controlling intake valve
US5197447A (en) * 1992-04-14 1993-03-30 Dick Leon B Engine having valve stroke adjuster and fuel preheater
EP0578637A1 (en) * 1991-03-16 1994-01-19 Anthony Edgar Blackburn Piston engine cycles.
WO1996016253A1 (en) * 1994-11-23 1996-05-30 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62195424A (en) * 1986-02-22 1987-08-28 Hiromichi Namikoshi Internal combustion engine for controlling output by controlling intake valve
EP0578637A1 (en) * 1991-03-16 1994-01-19 Anthony Edgar Blackburn Piston engine cycles.
US5197447A (en) * 1992-04-14 1993-03-30 Dick Leon B Engine having valve stroke adjuster and fuel preheater
WO1996016253A1 (en) * 1994-11-23 1996-05-30 Motive Holdings Limited Variable valve lift mechanism for internal combustion engine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2476852A (en) * 2010-09-16 2011-07-13 Anthony Edgar Blackburn Variable inlet valve actuation arrangement for a six-stroke IC engine
GB2476852B (en) * 2010-09-16 2012-01-11 Anthony Edgar Blackburn Six stroke 'Blackburn Cycle'
WO2012035285A1 (en) 2010-09-16 2012-03-22 Anthony Edgar Blackburn Six stroke 'blackburn cycle' engine
CN102877908A (en) * 2011-10-03 2013-01-16 摩尔动力(北京)技术股份有限公司 Short rod air distribution mechanism
CN102877908B (en) * 2011-10-03 2015-01-21 摩尔动力(北京)技术股份有限公司 Short rod air distribution mechanism
CN104775866A (en) * 2015-03-09 2015-07-15 常州嵘驰发动机技术有限公司 Driving device for suction and exhaust valve of internal combustion engine
AT521670A1 (en) * 2018-09-03 2020-03-15 Avl List Gmbh VARIABLE VALVE DRIVE DEVICE
AT16892U1 (en) * 2018-09-03 2020-11-15 Avl List Gmbh VARIABLE VALVE DRIVE DEVICE

Also Published As

Publication number Publication date
GB0714772D0 (en) 2007-09-05
GB2451448B (en) 2009-06-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20110728