US3865088A - Means for hydraulically controlling the operation of intake and exhaust valves of internal combustion engines - Google Patents

Means for hydraulically controlling the operation of intake and exhaust valves of internal combustion engines Download PDF

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Publication number
US3865088A
US3865088A US190525A US19052571A US3865088A US 3865088 A US3865088 A US 3865088A US 190525 A US190525 A US 190525A US 19052571 A US19052571 A US 19052571A US 3865088 A US3865088 A US 3865088A
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Prior art keywords
valve
pump
output
engine
liquid
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Expired - Lifetime
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US190525A
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English (en)
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Heinz Links
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    • 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
    • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
    • F01L9/10—Valve-gear or valve arrangements actuated non-mechanically by fluid means, e.g. hydraulic

Definitions

  • This invention relates to a control of the intake and exhaust valves of internal combustion engines by means of a liquid which in the valve opening direction intermittently exerts a force on the frontal face of a work piston, one associated with each valve to cooperate at least indirectly with the valve stem against the force of a closing spring.
  • the liquid is supplied in a substantially continuous manner by a delivery pump and the intermittent control is effected by means of a solenoid valve.
  • the effective work capacity of the liquid is variable as a function of the engine rpm or the engine load as described in German Pat. Application P I9 62 916.4
  • the effective work capacity of the hydraulic liquid is variable by means of a thermostatic control element as a function of the engine temperature, so that in case of a cold engine the amplitude of the opening stroke of particularly the intake valve is smaller than in the case of a warm and particularly a hot engine.
  • FIG. I is a longitudinal sectional view of the invention including schematic representation of the pump and solenoid control means;
  • FIG. 2 is a block circuit diagram of an electronic regulator for the control of the intake and exhaust valves according to the invention and FIG. 3 is a diagram showing different lifting curves of the tappet valves.
  • FIG. 1 in an only partially shown cylinder head 1 of an internal combustion engine there operates an intake or exhaust tappet 2 which has a valve stem 3 axially displaceably guided in a sleeve 4.
  • a spring seat disc 5 To one end of the valve stem 3 remote from the tappet 2 there is secured a spring seat disc 5. Between the latter and the cylinder head 1 there is inserted a closing spring 6.
  • a housing block 7 To the head 1 there is affixed a housing block 7 in which there is contained a solenoid valve S and a hydraulically operated work piston 9. The latter is axially slideably guided in a fluid-tight manner in a sleeve 10 securely held in the housing block 7.
  • One radial face of the work piston 9 is in an operative engagement with the valve stem 3 during the operation of the valve.
  • the other end of the work piston 9 projects into a chamber 11 which communicates with the solenoid valve 8.
  • the liquid which may be fuel, may have a pressure of, for example, kg/cm
  • a conduit 16 which contains a pressure control valve 17 (pressure limiting valve) and which is in communication with the liquid tank 13.
  • conduit 15 there extend conduits 18 which lead to the control units (not shown) of the other engine valves and which carry pressurized liquid supplied thereto by the same delivery pump 14.
  • a nipple 19 the liquid is admitted into a bore 20 which merges into a control chamber 21 of the solenoid valve 3.
  • the mouth of the bore 20 is formed as a valve seat and is controlled by a valve ball 22 which is movably situated in the control chamber 21. From the latter there extends a bore 23 to the chamber 11 which receives the upper terminus of the work piston 9. Further, from the control chamber 21 there extends a bore 24 from which there leads a discharge channel 25 and an adjoining return conduit 26 to the liquid tank 13.
  • the opening between the control chamber 21 and the bore 24 is also formed as a valve seat for the valve ball 22. The latter is urged against the mouth of the bore 20 by a spring 27 with the interposition of an armature 28 which has a pin 28 and which forms part of the solenoid valve 8.
  • the control chamber 21, the bore 24 and the arma ture 28 are supported in a valve block 29 which is arranged in the housing block 7 and which is locked in position by the flanged housing 30 of a solenoid 33.
  • the chamber 30 receiving the spring 27 as well as the bore are interconnected by means of a channel 31 to equalize the pressure in chamber and bore 20.
  • the diameter of the armature 28 in the range of its fluid-tight engagement with the wall of the bore 24 is identical to the diameter of both valve seats for the valve ball 22.
  • the force exerted thereon in the opening direction by virtue of the pressure prevailing in the bore 20 is equal to the force of the liquid pressure exerted on the ball through the armature 28 in the closing direction.
  • the spring 27 exerts an additional force in the closing direction so that the valve ball 22 is in a stable manner urged against its seat at the mouth of bore 20.
  • the motion of the work piston 9 may be hydraulically braked towards the end of either of its strokes.
  • a collar 34 which, at either end of the reciprocating motion of the piston 9, enters in one of the cavities 35 or 35, which have a slightly larger diameter than the collar 34.
  • the collar 34 displaces the liquid present in the respective cavity and causes it to escape between the narrow clearance formed by the collar 34 and the wall of the cavity 35 or 35. In this manner a braking (dashpot) effect is achieved.
  • the output of the delivery pump 14 may be varied by means of a servo device 37.
  • the latter may be hydraulic servo piston, or an electric servo motor or any other similar device.
  • the servo device 37 receives its command signals from an electronic control apparatus 38.
  • the latter evaluates the signals representing actual values, particularly those characterizing engine variables (for example, the position of the gas pedal 40 or that of the brake pedal, the pressure of the servo liquid admitted through a conduit 41 as well as the engine temperature) to form a desired value of pump output. Signals representing this desired value are applied by the electronic control apparatus 38 to the servo device 37.
  • the magnitude of the opening stroke of the valve 2 is dependent upon the pressure of the liquid admitted to the chamber 11 and delivered by the pump 14. It is apparent that the valve 2 is displaced only to such an extent until the closing force which is exerted by the spring 6 and which continuously increases due to the progressive compression of the spring 6 during the opening stroke of valve 2, is in equilibrium with the opening force exerted by the pressurized liquid on the radial work face of the piston 9. Thus, the magnitude or amplitude of the opening stroke of the valve 2 'depends upon the output of the delivery pump 14. independently from the foregoing effect, the length of the open or closed valve period as well as the beginning thereof may be determined by appropriate signals applied to the solenoid valve 8 by the same electronic control apparatus 38.
  • the engine temperature is sensed by a thermostat member 43 which may comprise a heat-expandable component and which is installed in the housing 44 of the engine.
  • a setting pin 45 of the thermostat member 43 controls a potentiometer 46 or the like, the electric output signals of which thus are a function of the engine temperature and are applied to the electronic control apparatus 38.
  • FIG. 2 illustrates in a block circuit diagram an example of the structure of the electronic control apparatus 38.
  • the latter includes a regulator 38R and in a feed-back circuit 41 to the regulator 38R, a converter 38F.
  • the regulator 38R is formed as an amplifier, the output signal of which is applied to the electromagnetically operating servo device 37 associated with the pump 14 for changing the output thereof.
  • the feedback circuit 41 forms a closed pressure regulating circuit with the converter 38F. The latter generates, from the pressure values of the output side of pump 14, an electric signal which is compared with the output signals (functioning as control magnitude) of the accelerator pedal 40.
  • the electric signal which depends on the temperature and which is generated by the signal transmitting device 46 affects the regulator 38R in such a manner that in case of an increasing engine temperature, the output of the pump 14 also increases, whereby, accordingly. a greater opening stroke of the valve 2 is obtained.
  • FIG. 3 the diagram shown therein well illustrates the advantage of the aforedescribed thermostatic control.
  • the stroke S of the engine valve measured along the ordinate, is shown as a function of the rotational angle a (abscissa) of the engine cam shaft.
  • the stroke S indicates the structurally possible maximum stroke of the engine valve 2 during normal operation.
  • the associated lifting curve is indicated at l.
  • the curves II and III correspond to the opening stroke of the engine valve during warm-up operation and starting operation, respectively.
  • said means for controlling the output of said pump in cludes an electronic control apparatus having an input connected to said engine temperature-responsive thermostatic control means and an output connected to said pump for varying the output thereof.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Valve Device For Special Equipments (AREA)
  • Output Control And Ontrol Of Special Type Engine (AREA)
US190525A 1970-10-19 1971-10-19 Means for hydraulically controlling the operation of intake and exhaust valves of internal combustion engines Expired - Lifetime US3865088A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702051220 DE2051220A1 (de) 1970-10-19 1970-10-19 Steuerung von Ein- und Auslaßventilen bei Brennkraftmaschinen durch Flüssigkeit

Publications (1)

Publication Number Publication Date
US3865088A true US3865088A (en) 1975-02-11

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Family Applications (1)

Application Number Title Priority Date Filing Date
US190525A Expired - Lifetime US3865088A (en) 1970-10-19 1971-10-19 Means for hydraulically controlling the operation of intake and exhaust valves of internal combustion engines

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US (1) US3865088A (enrdf_load_stackoverflow)
CS (1) CS151421B2 (enrdf_load_stackoverflow)
DE (1) DE2051220A1 (enrdf_load_stackoverflow)
FR (1) FR2110031A6 (enrdf_load_stackoverflow)
GB (1) GB1373403A (enrdf_load_stackoverflow)
IT (1) IT969041B (enrdf_load_stackoverflow)
RO (1) RO61884A7 (enrdf_load_stackoverflow)
SE (1) SE390435B (enrdf_load_stackoverflow)
SU (1) SU694092A3 (enrdf_load_stackoverflow)

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200067A (en) * 1978-05-01 1980-04-29 General Motors Corporation Hydraulic valve actuator and fuel injection system
US4206728A (en) * 1978-05-01 1980-06-10 General Motors Corporation Hydraulic valve actuator system
WO1982002574A1 (en) * 1981-01-20 1982-08-05 Wride Donald Charles Variable lift cam follower
US4656976A (en) * 1984-04-01 1987-04-14 Rhoads Gary E Hydraulic rocker arm
US4694787A (en) * 1984-02-27 1987-09-22 Rhoads Gary E Automatic fluid distributing valve timing device
US4716863A (en) * 1985-11-15 1988-01-05 Pruzan Daniel A Internal combustion engine valve actuation system
US4862844A (en) * 1987-10-29 1989-09-05 Allied-Signal Inc. Valve assembly for internal combustion engine
US5085181A (en) * 1990-06-18 1992-02-04 Feuling Engineering, Inc. Electro/hydraulic variable valve timing system
US5103779A (en) * 1989-04-18 1992-04-14 Hare Sr Nicholas S Electro-rheological valve control mechanism
US5158109A (en) * 1989-04-18 1992-10-27 Hare Sr Nicholas S Electro-rheological valve
US5190262A (en) * 1991-12-09 1993-03-02 Dresser-Rand Company Hydraulically-operated valve assembly
US5197419A (en) * 1991-05-06 1993-03-30 Dingess Billy E Internal combustion engine hydraulic actuated and variable valve timing device
US6173685B1 (en) * 1995-05-17 2001-01-16 Oded E. Sturman Air-fuel module adapted for an internal combustion engine
US6938598B1 (en) 2004-03-19 2005-09-06 Ford Global Technologies, Llc Starting an engine with electromechanical valves
US20050209045A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control for an internal combustion engine
US20050205059A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Engine breathing in an engine with mechanical and electromechanical valves
US20050204726A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst
US20050205048A1 (en) * 2004-03-19 2005-09-22 Vince Winstead Method to start electromechanical valves on an internal combustion engine
US20050205064A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Reducing engine emissions on an engine with electromechanical valves
US20050205063A1 (en) * 2004-03-19 2005-09-22 Kolmanovsky Ilya V Method of torque control for an engine with valves that may be deactivated
US20050205047A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromagnetic valve control in an internal combustion engine with an asymmetric exhaust system design
US20050205044A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control based on a vehicle electrical system
US20050205060A1 (en) * 2004-03-19 2005-09-22 Michelini John O Cylinder and valve mode control for an engine with valves that may be deactivated
US20050204727A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Cylinder deactivation for an internal combustion engine
US20050205037A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Starting an engine with valves that may be deactivated
US20050205046A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Valve selection for an engine operating in a multi-stroke cylinder mode
US20050205038A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Quick starting engine with electromechanical valves
US20050205074A1 (en) * 2004-03-19 2005-09-22 Alex Gibson Engine air-fuel control for an engine with valves that may be deactivated
US20050205027A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control for an internal combustion engine
US20050205069A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanical valve timing during a start
US20050205045A1 (en) * 2004-03-19 2005-09-22 Michelini John O Valve control to reduce modal frequencies that may cause vibration
US20050205054A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Valve control for an engine with electromechanically actuated valves
US20050279323A1 (en) * 2004-03-19 2005-12-22 Lewis Donald J Internal combustion engine shut-down for engine having adjustable valves
US7028650B2 (en) 2004-03-19 2006-04-18 Ford Global Technologies, Llc Electromechanical valve operating conditions by control method
US7032545B2 (en) 2004-03-19 2006-04-25 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US7107947B2 (en) 2004-03-19 2006-09-19 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US8055430B2 (en) * 2006-12-21 2011-11-08 Toyota Jidosha Kabushiki Kaisha Valve performance controller for internal combustion engine
US8381693B2 (en) 2007-11-23 2013-02-26 Empa Eidgenossische Materialprufungs-Und Forschungsanstalt Hydraulically operated valve actuation and internal combustion engine with such a valve actuation

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU517642B2 (en) * 1978-07-19 1981-08-13 Nissan Motor Company Limited Hydraulic valve lifter
FR2468732A1 (fr) * 1979-10-26 1981-05-08 Renault Distribution variable a commande hydraulique pour moteurs a combustion interne
DE3004396A1 (de) * 1980-02-07 1981-08-13 Dr.Ing.H.C. F. Porsche Ag, 7000 Stuttgart Ventilsteuerung fuer brennkraftmaschinen
US5259345A (en) * 1992-05-05 1993-11-09 North American Philips Corporation Pneumatically powered actuator with hydraulic latching
FR2758857A1 (fr) * 1997-01-27 1998-07-31 Aisin Seiki Dispositif de commande de soupape pour un moteur a combustion interne
HUP1100259A2 (en) * 2011-05-20 2012-12-28 Vestroci Nandor Hydraulic valve gear for common rail injection system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209737A (en) * 1962-06-27 1965-10-05 Mitsubishi Shipbuilding & Eng Valve operating device for internal combustion engine
US3416502A (en) * 1965-04-22 1968-12-17 Weiss Joseph Internal combustion engines
US3548793A (en) * 1968-10-31 1970-12-22 James S Richardson Valve actuating mechanism for internal combustion engines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3209737A (en) * 1962-06-27 1965-10-05 Mitsubishi Shipbuilding & Eng Valve operating device for internal combustion engine
US3416502A (en) * 1965-04-22 1968-12-17 Weiss Joseph Internal combustion engines
US3548793A (en) * 1968-10-31 1970-12-22 James S Richardson Valve actuating mechanism for internal combustion engines

Cited By (74)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4200067A (en) * 1978-05-01 1980-04-29 General Motors Corporation Hydraulic valve actuator and fuel injection system
US4206728A (en) * 1978-05-01 1980-06-10 General Motors Corporation Hydraulic valve actuator system
WO1982002574A1 (en) * 1981-01-20 1982-08-05 Wride Donald Charles Variable lift cam follower
US4502425A (en) * 1981-01-20 1985-03-05 Marlene A. Wride Variable lift cam follower
US4694787A (en) * 1984-02-27 1987-09-22 Rhoads Gary E Automatic fluid distributing valve timing device
US4656976A (en) * 1984-04-01 1987-04-14 Rhoads Gary E Hydraulic rocker arm
US4716863A (en) * 1985-11-15 1988-01-05 Pruzan Daniel A Internal combustion engine valve actuation system
US4862844A (en) * 1987-10-29 1989-09-05 Allied-Signal Inc. Valve assembly for internal combustion engine
US5103779A (en) * 1989-04-18 1992-04-14 Hare Sr Nicholas S Electro-rheological valve control mechanism
US5158109A (en) * 1989-04-18 1992-10-27 Hare Sr Nicholas S Electro-rheological valve
US5085181A (en) * 1990-06-18 1992-02-04 Feuling Engineering, Inc. Electro/hydraulic variable valve timing system
US5197419A (en) * 1991-05-06 1993-03-30 Dingess Billy E Internal combustion engine hydraulic actuated and variable valve timing device
US5190262A (en) * 1991-12-09 1993-03-02 Dresser-Rand Company Hydraulically-operated valve assembly
US6173685B1 (en) * 1995-05-17 2001-01-16 Oded E. Sturman Air-fuel module adapted for an internal combustion engine
US6938598B1 (en) 2004-03-19 2005-09-06 Ford Global Technologies, Llc Starting an engine with electromechanical valves
US20050209045A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control for an internal combustion engine
US20050205059A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Engine breathing in an engine with mechanical and electromechanical valves
US20050204726A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst
US20050205048A1 (en) * 2004-03-19 2005-09-22 Vince Winstead Method to start electromechanical valves on an internal combustion engine
US20050205064A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Reducing engine emissions on an engine with electromechanical valves
US20050205063A1 (en) * 2004-03-19 2005-09-22 Kolmanovsky Ilya V Method of torque control for an engine with valves that may be deactivated
US20050205047A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromagnetic valve control in an internal combustion engine with an asymmetric exhaust system design
US20050205044A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control based on a vehicle electrical system
US20050205060A1 (en) * 2004-03-19 2005-09-22 Michelini John O Cylinder and valve mode control for an engine with valves that may be deactivated
US20050204727A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Cylinder deactivation for an internal combustion engine
US20050205037A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Starting an engine with valves that may be deactivated
US20050205046A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Valve selection for an engine operating in a multi-stroke cylinder mode
US20050205038A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Quick starting engine with electromechanical valves
US20050205074A1 (en) * 2004-03-19 2005-09-22 Alex Gibson Engine air-fuel control for an engine with valves that may be deactivated
US20050205036A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Starting an engine with electromechanical valves
US20050205027A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanically actuated valve control for an internal combustion engine
US20050205069A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Electromechanical valve timing during a start
US20050205045A1 (en) * 2004-03-19 2005-09-22 Michelini John O Valve control to reduce modal frequencies that may cause vibration
US20050205054A1 (en) * 2004-03-19 2005-09-22 Lewis Donald J Valve control for an engine with electromechanically actuated valves
US20050279323A1 (en) * 2004-03-19 2005-12-22 Lewis Donald J Internal combustion engine shut-down for engine having adjustable valves
US7017539B2 (en) 2004-03-19 2006-03-28 Ford Global Technologies Llc Engine breathing in an engine with mechanical and electromechanical valves
US7021289B2 (en) 2004-03-19 2006-04-04 Ford Global Technology, Llc Reducing engine emissions on an engine with electromechanical valves
US7028650B2 (en) 2004-03-19 2006-04-18 Ford Global Technologies, Llc Electromechanical valve operating conditions by control method
US7031821B2 (en) 2004-03-19 2006-04-18 Ford Global Technologies, Llc Electromagnetic valve control in an internal combustion engine with an asymmetric exhaust system design
US7032545B2 (en) 2004-03-19 2006-04-25 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US7032581B2 (en) 2004-03-19 2006-04-25 Ford Global Technologies, Llc Engine air-fuel control for an engine with valves that may be deactivated
US7055483B2 (en) 2004-03-19 2006-06-06 Ford Global Technologies, Llc Quick starting engine with electromechanical valves
US7063062B2 (en) 2004-03-19 2006-06-20 Ford Global Technologies, Llc Valve selection for an engine operating in a multi-stroke cylinder mode
US7066121B2 (en) 2004-03-19 2006-06-27 Ford Global Technologies, Llc Cylinder and valve mode control for an engine with valves that may be deactivated
US7072758B2 (en) 2004-03-19 2006-07-04 Ford Global Technologies, Llc Method of torque control for an engine with valves that may be deactivated
US7079935B2 (en) 2004-03-19 2006-07-18 Ford Global Technologies, Llc Valve control for an engine with electromechanically actuated valves
US20060201458A1 (en) * 2004-03-19 2006-09-14 Ford Global Technologies, Llc Engine Shut-down for Engine Having Adjustable Valve Timing
US7107946B2 (en) * 2004-03-19 2006-09-19 Ford Global Technologies, Llc Electromechanically actuated valve control for an internal combustion engine
US7107947B2 (en) 2004-03-19 2006-09-19 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US7128687B2 (en) 2004-03-19 2006-10-31 Ford Global Technologies, Llc Electromechanically actuated valve control for an internal combustion engine
US7128043B2 (en) 2004-03-19 2006-10-31 Ford Global Technologies, Llc Electromechanically actuated valve control based on a vehicle electrical system
US7140355B2 (en) 2004-03-19 2006-11-28 Ford Global Technologies, Llc Valve control to reduce modal frequencies that may cause vibration
US7165391B2 (en) 2004-03-19 2007-01-23 Ford Global Technologies, Llc Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst
US7194993B2 (en) 2004-03-19 2007-03-27 Ford Global Technologies, Llc Starting an engine with valves that may be deactivated
US20070107687A1 (en) * 2004-03-19 2007-05-17 Lewis Donald J Multi-stroke cylinder operation in an internal combustion engine
US7234435B2 (en) 2004-03-19 2007-06-26 Ford Global Technologies, Llc Electrically actuated valve deactivation in response to vehicle electrical system conditions
US7240663B2 (en) 2004-03-19 2007-07-10 Ford Global Technologies, Llc Internal combustion engine shut-down for engine having adjustable valves
US20070208471A1 (en) * 2004-03-19 2007-09-06 Ford Global Technologies, Llc Electrically Actuated Vavle Deactivation in Response to Vehicle Electrical System Conditions
US7317984B2 (en) 2004-03-19 2008-01-08 Ford Global Technologies Llc Engine shut-down for engine having adjustable valve timing
US7320300B2 (en) 2004-03-19 2008-01-22 Ford Global Technologies Llc Multi-stroke cylinder operation in an internal combustion engine
US20080041327A1 (en) * 2004-03-19 2008-02-21 Ford Global Technologies, Llc Multi-Stroke Cylinder Operation in an Internal Combustion Engine
US20080098980A1 (en) * 2004-03-19 2008-05-01 Ford Global Technologies, Llc Engine shut-down for engine having adjustable valve timing
US7383820B2 (en) 2004-03-19 2008-06-10 Ford Global Technologies, Llc Electromechanical valve timing during a start
US7401606B2 (en) 2004-03-19 2008-07-22 Ford Global Technologies, Llc Multi-stroke cylinder operation in an internal combustion engine
US20080283004A1 (en) * 2004-03-19 2008-11-20 Ford Global Technologies, Llc Electromechanical valve timing during a start
US7532972B2 (en) 2004-03-19 2009-05-12 Ford Global Technologies, Llc Method of torque control for an engine with valves that may be deactivated
US7549406B2 (en) 2004-03-19 2009-06-23 Ford Global Technologies, Llc Engine shut-down for engine having adjustable valve timing
US7555896B2 (en) 2004-03-19 2009-07-07 Ford Global Technologies, Llc Cylinder deactivation for an internal combustion engine
US7559309B2 (en) 2004-03-19 2009-07-14 Ford Global Technologies, Llc Method to start electromechanical valves on an internal combustion engine
US7717071B2 (en) 2004-03-19 2010-05-18 Ford Global Technologies, Llc Electromechanical valve timing during a start
US7743747B2 (en) 2004-03-19 2010-06-29 Ford Global Technologies, Llc Electrically actuated valve deactivation in response to vehicle electrical system conditions
US8820049B2 (en) 2004-03-19 2014-09-02 Ford Global Technologies, Llc Method to reduce engine emissions for an engine capable of multi-stroke operation and having a catalyst
US8055430B2 (en) * 2006-12-21 2011-11-08 Toyota Jidosha Kabushiki Kaisha Valve performance controller for internal combustion engine
US8381693B2 (en) 2007-11-23 2013-02-26 Empa Eidgenossische Materialprufungs-Und Forschungsanstalt Hydraulically operated valve actuation and internal combustion engine with such a valve actuation

Also Published As

Publication number Publication date
SU694092A3 (ru) 1979-10-25
CS151421B2 (enrdf_load_stackoverflow) 1973-10-19
SE390435B (sv) 1976-12-20
DE2051220A1 (de) 1972-04-20
GB1373403A (en) 1974-11-13
RO61884A7 (enrdf_load_stackoverflow) 1977-08-15
FR2110031A6 (enrdf_load_stackoverflow) 1972-05-26
IT969041B (it) 1974-03-30

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