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US20070113805A1 - Internal combustion engine comprising a variable valve lift system and a method for controlling valve lift shifting - Google Patents

Internal combustion engine comprising a variable valve lift system and a method for controlling valve lift shifting Download PDF

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Publication number
US20070113805A1
US20070113805A1 US11/556,737 US55673706A US2007113805A1 US 20070113805 A1 US20070113805 A1 US 20070113805A1 US 55673706 A US55673706 A US 55673706A US 2007113805 A1 US2007113805 A1 US 2007113805A1
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United States
Prior art keywords
valve lift
fuel supply
engine
threshold value
internal combustion
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.)
Abandoned
Application number
US11/556,737
Inventor
Martin Litorell
Thomas Lyngfelt
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Ford Global Technologies LLC
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
Assigned to VOLVO CAR CORPORATION reassignment VOLVO CAR CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LITORELL, MARTIN, LYNGFELT, THOMAS
Assigned to FORD GLOBAL TECHNOLOGIES, LLC reassignment FORD GLOBAL TECHNOLOGIES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: VOLVO CAR CORPORATION
Publication of US20070113805A1 publication Critical patent/US20070113805A1/en
Abandoned 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
    • 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
    • F02D13/0203—Variable control of intake and exhaust valves
    • F02D13/0207—Variable control of intake and exhaust valves 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
    • 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
    • F01L13/0036—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 the valves being driven by two or more cams with different shape, size or timing or a single cam profiled in axial and radial direction
    • 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
    • F02D13/0234—Variable control of the intake valves only changing the valve timing only
    • F02D13/0238—Variable control of the intake valves only changing the valve timing only by shifting the phase, i.e. the opening periods of the valves are constant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0002—Controlling intake air
    • F02D2041/001—Controlling intake air for engines with variable valve actuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2250/00—Engine control related to specific problems or objectives
    • F02D2250/18—Control of the engine output torque
    • F02D2250/21—Control of the engine output torque during a transition between engine operation modes or states
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/04—Introducing corrections for particular operating conditions
    • F02D41/12—Introducing corrections for particular operating conditions for deceleration
    • F02D41/123—Introducing corrections for particular operating conditions for deceleration the fuel injection being cut-off
    • 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

Definitions

  • the present invention relates to a method for controlling valve lift shifting in an internal combustion engine comprising a variable valve lift system whereby the engine can operate selectively in either of at least two valve lift modes, and more particularly to minimizing torque changes when shifting modes in a variable valve lift system of an internal combustion engine.
  • switching cam profiles can introduce a change in the output torque of the engine, which can cause discomfort to persons in a vehicle in which the engine is operating.
  • the reason for such a change in the output torque could be that in the amount of air trapped in the cylinders differ from one valve lift mode to another.
  • the present invention is directed to a method for minimizing a change in engine output torque when shifting modes in a variable valve lift system of an internal combustion engine, the method including comparing an actual fuel supply with a fuel supply threshold value, and at least partly based on the result of the comparison, determining whether a valve lift mode shift should be performed.
  • a valve lift mode shift is performed.
  • the fuel supply threshold value should be chosen so that the energy released at individual combustions, regardless of the air supply, is low. Thereby, at, or under the fuel supply threshold value, a difference of the air supply caused by a valve lift mode shift will not cause a noticeable step in the output torque of the engine.
  • the invention does not exclude the possibility that criteria other than the fuel supply, such as requested transient torque, can be considered when determining whether a valve lift mode shift should be performed.
  • the fuel supply threshold value corresponds to the fuel supply being cut off. Therefore, it is secured that a difference of the air supply caused by a valve lift mode shift will not cause a step in the output torque of the engine.
  • FIG. 1 is a schematic view of parts of an internal combustion engine, comprising a variable valve timing system and a cam profile shifting system, the latter in a low lift position;
  • FIG. 2 is a detail of the view in FIG. 1 , where the cam profiles have been shifted to a high lift position;
  • FIG. 3 is a block diagram depicting a method according to an embodiment of the invention.
  • FIG. 1 shows schematically parts of an internal combustion engine.
  • a camshaft 1 is driven by a crankshaft 2 via a belt (or chain) 3 , a crankshaft wheel 3 a , and a camshaft wheel 3 b in a manner known in the art.
  • the engine comprises a variable valve lift system in the form of a cam profile shifting (CPS) system 4 , adapted to shift the lift profile of intake and/or exhaust valves of the engine, by changing the valve lift provided by camlobes 6 a , 6 b on the camshaft 1 .
  • CPS cam profile shifting
  • FIG. 1 only one valve, in the form of an intake valve 5 at a cylinder 5 a is shown.
  • each valve 5 there is provided one low lift camlobe 6 a and two high lift camlobes 6 b .
  • each of the camlobes 6 a , 6 b acts on valve actuators 4 a , 4 b , located between the camlobes and the valve.
  • the valve actuators are fixable to each other by a CPS actuator 4 c , here in the form of a locking pin 4 c , in turn controllable by a hydraulic system 9 , indicated in FIG. I with broken lines.
  • the hydraulic system 9 can be, as is known in the art, used for manoeuvring a plurality of units of the engine, and comprises a hydraulic pump 9 a .
  • the cam profile shifting (CPS) system 4 comprises a CPS actuator control valve 9 b in the hydraulic system 9 .
  • the CPS actuator control valve 9 b is controllable by an engine control unit (ECU) 7 .
  • the CPS actuator control valve 9 b can be of a known type, for example a solenoid valve, not further described here.
  • the ECU 7 has, as known, computational capabilities and storage capabilities, and can be formed by one device, or more than one physically separate, but logically connected devices.
  • valve actuators 4 a , 4 b are not fixed to each other by the CPS actuator 4 c , which results in the valve lift being controlled by the low lift camlobe 6 a .
  • the valve actuators 4 a , 4 b are fixed to each other by the CPS actuator 4 c , so that the valve motion is controlled by the high lift camlobes 6 b.
  • variable valve lift system can be provided in a variety of manners known in the art, for example as described in U.S. Pat. No. 5,950,583A.
  • the CPS actuator can be provided in alternative manners, and the CPS system can be adapted to assume more than two cam profile modes.
  • the engine also comprises a variable valve timing (VVT) system 8 , which is adapted to adjust the VVT position, i.e. set the camshaft I at desired angular positions in relation to the camshaft wheel 3 b .
  • the VVT system comprises a VVT actuator 8 a , for example of the type described in U.S. Pat. No. 6,135,077A, at the camshaft wheel 3 b .
  • the VVT actuator 8 a is adapted to mechanically change the VVT position, and is controllable by the hydraulic system 9 .
  • the VVT system 8 comprises a VVT actuator control valve 9 c in the hydraulic system 9 .
  • the VVT actuator control valve 9 c is also controllable by the ECU 7 , and could be of the same type as the CPS actuator control valve 9 b.
  • a fuel injector 11 is controllable by the ECU 7 .
  • the fuel injector can be provided in the cylinder 5 .
  • the ECU 7 is adapted to determine a required CPS mode 311 , and a current CPS mode 312 , and also to determine whether the required and the current CPS modes are identical 313 . If they are identical, no cam profile shift is performed 314 . If the required and the current CPS modes are not identical, it is determined 315 whether the current engine fuel supply CF, provided by the fuel injector(s) 11 , is below a fuel supply threshold value FT, described closer below.
  • fuel supply refers to the total supply of fuel in the engine. Alternatively, it could refer to a mean fuel supply to the respective cylinder, i.e. the total supply in the engine divided by the number of cylinders.
  • a valve lift mode shift should be performed. If the engine fuel supply CF is equal to or below the fuel supply threshold value FT, a valve lift mode shift is performed 316 . If the engine fuel supply CF is above the fuel supply threshold value FT, it is determined 317 whether the CPS mode should be changed according to an alternative CPS mode shifting strategy.
  • This alternative strategy could be a strategy that takes the VVT position into account for cam profile shifts, as described in the European Patent Application No. 05110938.7, filed by the same applicant on the same day as this application.
  • a valve lift mode shift is performed 316 .
  • a required CPS mode 311 and a current CPS mode 312 are again determined.
  • the fuel supply threshold value FT could be predetermined, or it could be determined based on at least one engine operation related parameter, for example the engine speed. Such determinations could be based on predetermined functions or tables mapping the fuel supply threshold value FT to the engine operation related parameter(s). Also, the fuel supply threshold value FT could be calibratable. In a preferred embodiment, the fuel supply threshold value FT is zero, i.e. the fuel supply CF is cut off.

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  • 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

An internal combustion engine including a variable valve lift system whereby the engine can operate selectively in either of at least two valve lift modes, as well as a method for controlling valve lift shifting in such an engine are disclosed. The method comprises comparing the fuel supply with a fuel supply threshold value, and at least partly based on the result of the comparison, determining whether a valve lift mode shift should be performed. Preferably, the fuel supply threshold value corresponds to the fuel supply being cut off.

Description

    TECHNICAL FIELD
  • The present invention relates to a method for controlling valve lift shifting in an internal combustion engine comprising a variable valve lift system whereby the engine can operate selectively in either of at least two valve lift modes, and more particularly to minimizing torque changes when shifting modes in a variable valve lift system of an internal combustion engine.
    • BACKGROUND AND SUMMARY OF THE INVENTION
  • In an internal combustion engine with a variable valve lift system, in particular a cam profile shifting (CPS) system, for instance as described in U.S. Pat. No. 5,287,830A, switching cam profiles can introduce a change in the output torque of the engine, which can cause discomfort to persons in a vehicle in which the engine is operating. The reason for such a change in the output torque could be that in the amount of air trapped in the cylinders differ from one valve lift mode to another.
  • Accordingly, the present invention is directed to a method for minimizing a change in engine output torque when shifting modes in a variable valve lift system of an internal combustion engine, the method including comparing an actual fuel supply with a fuel supply threshold value, and at least partly based on the result of the comparison, determining whether a valve lift mode shift should be performed.
  • Thereby, based on the comparison, it can be determined that if the fuel supply is equal to or below the fuel supply threshold value, a valve lift mode shift is performed. As is closer described below, if the engine fuel supply is above the fuel supply threshold value, it can be determined that a valve lift mode shift is not performed. The fuel supply threshold value should be chosen so that the energy released at individual combustions, regardless of the air supply, is low. Thereby, at, or under the fuel supply threshold value, a difference of the air supply caused by a valve lift mode shift will not cause a noticeable step in the output torque of the engine.
  • It should be noted that the invention does not exclude the possibility that criteria other than the fuel supply, such as requested transient torque, can be considered when determining whether a valve lift mode shift should be performed.
  • Preferably, the fuel supply threshold value corresponds to the fuel supply being cut off. Thereby, it is secured that a difference of the air supply caused by a valve lift mode shift will not cause a step in the output torque of the engine.
  • It will be appreciated that features of the invention are susceptible to being combined in any combination without departing from the scope of the invention as de-fined by the accompanying claims.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • By way of example only, embodiments of the present invention will now be de-scribed with reference to the accompanying drawings wherein:
  • FIG. 1 is a schematic view of parts of an internal combustion engine, comprising a variable valve timing system and a cam profile shifting system, the latter in a low lift position;
  • FIG. 2 is a detail of the view in FIG. 1, where the cam profiles have been shifted to a high lift position; and
  • FIG. 3 is a block diagram depicting a method according to an embodiment of the invention.
    • DETAILED DESCRIPTION
  • FIG. 1 shows schematically parts of an internal combustion engine. A camshaft 1 is driven by a crankshaft 2 via a belt (or chain) 3, a crankshaft wheel 3 a, and a camshaft wheel 3 b in a manner known in the art. The engine comprises a variable valve lift system in the form of a cam profile shifting (CPS) system 4, adapted to shift the lift profile of intake and/or exhaust valves of the engine, by changing the valve lift provided by camlobes 6 a, 6 b on the camshaft 1. In FIG. 1 only one valve, in the form of an intake valve 5 at a cylinder 5 a is shown. In this example, for each valve 5 there is provided one low lift camlobe 6 a and two high lift camlobes 6 b. In operation each of the camlobes 6 a, 6 b acts on valve actuators 4 a, 4 b, located between the camlobes and the valve. The valve actuators are fixable to each other by a CPS actuator 4 c, here in the form of a locking pin 4 c, in turn controllable by a hydraulic system 9, indicated in FIG. I with broken lines. The hydraulic system 9 can be, as is known in the art, used for manoeuvring a plurality of units of the engine, and comprises a hydraulic pump 9 a. For control of the CPS actuator(s) 4 c, the cam profile shifting (CPS) system 4 comprises a CPS actuator control valve 9 b in the hydraulic system 9. The CPS actuator control valve 9 b is controllable by an engine control unit (ECU) 7. The CPS actuator control valve 9 b can be of a known type, for example a solenoid valve, not further described here. The ECU 7 has, as known, computational capabilities and storage capabilities, and can be formed by one device, or more than one physically separate, but logically connected devices.
  • In a low lift mode, shown in FIG. 1, the valve actuators 4 a, 4 b are not fixed to each other by the CPS actuator 4 c, which results in the valve lift being controlled by the low lift camlobe 6 a. As can be seen in FIG. 2, in a high lift mode the valve actuators 4 a, 4 b are fixed to each other by the CPS actuator 4 c, so that the valve motion is controlled by the high lift camlobes 6 b.
  • Alternatively, still within the scope of the present invention, the variable valve lift system can be provided in a variety of manners known in the art, for example as described in U.S. Pat. No. 5,950,583A. In particular, the CPS actuator can be provided in alternative manners, and the CPS system can be adapted to assume more than two cam profile modes.
  • The engine also comprises a variable valve timing (VVT) system 8, which is adapted to adjust the VVT position, i.e. set the camshaft I at desired angular positions in relation to the camshaft wheel 3 b. The VVT system comprises a VVT actuator 8 a, for example of the type described in U.S. Pat. No. 6,135,077A, at the camshaft wheel 3 b. The VVT actuator 8 a is adapted to mechanically change the VVT position, and is controllable by the hydraulic system 9. For control of the VVT actuator 8 a, the VVT system 8 comprises a VVT actuator control valve 9 c in the hydraulic system 9. The VVT actuator control valve 9 c is also controllable by the ECU 7, and could be of the same type as the CPS actuator control valve 9 b.
  • Also provided are means (not shown) to establish the engine speed, in a manner known in the art.
  • As can be seen in FIG. 1, in an intake manifold 10 a fuel injector 11 is controllable by the ECU 7. Alternatively, the fuel injector can be provided in the cylinder 5.
  • Here reference is made to FIG. 3. The ECU 7 is adapted to determine a required CPS mode 311, and a current CPS mode 312, and also to determine whether the required and the current CPS modes are identical 313. If they are identical, no cam profile shift is performed 314. If the required and the current CPS modes are not identical, it is determined 315 whether the current engine fuel supply CF, provided by the fuel injector(s) 11, is below a fuel supply threshold value FT, described closer below. Here, fuel supply refers to the total supply of fuel in the engine. Alternatively, it could refer to a mean fuel supply to the respective cylinder, i.e. the total supply in the engine divided by the number of cylinders.
  • Based on the result of the determination 315 regarding the engine fuel supply CF, it is determined whether a valve lift mode shift should be performed. If the engine fuel supply CF is equal to or below the fuel supply threshold value FT, a valve lift mode shift is performed 316. If the engine fuel supply CF is above the fuel supply threshold value FT, it is determined 317 whether the CPS mode should be changed according to an alternative CPS mode shifting strategy. This alternative strategy could be a strategy that takes the VVT position into account for cam profile shifts, as described in the European Patent Application No. 05110938.7, filed by the same applicant on the same day as this application. If it is determined 317 according to the alternative CPS mode shifting strategy that a valve lift mode shift should be performed, a valve lift mode shift is performed 316. However, if it is determined 317 according to the alternative CPS mode shifting strategy that a valve lift mode shift should not be performed, a required CPS mode 311 and a current CPS mode 312 are again determined.
  • Alternatively, if it is determined 317 according to the alternative CPS mode shifting strategy that a valve lift mode shift should not be performed, simply no cam profile shift is performed. As a further alternative, no consideration for any alternative CPS mode shifting strategy could be made. In such a case, if it is determined 315 that the engine fuel supply CF is above the fuel supply threshold value FT, a required CPS mode 311 and a current CPS mode 312 are again determined, or simply no cam profile shift is performed.
  • The fuel supply threshold value FT could be predetermined, or it could be determined based on at least one engine operation related parameter, for example the engine speed. Such determinations could be based on predetermined functions or tables mapping the fuel supply threshold value FT to the engine operation related parameter(s). Also, the fuel supply threshold value FT could be calibratable. In a preferred embodiment, the fuel supply threshold value FT is zero, i.e. the fuel supply CF is cut off.
  • It should be noted that the invention is equally applicable to engines with variable valve lift systems providing more than two valve lift modes.
  • It should also be noted that the method according to the invention is equally applicable to engines with spark ignition and engines with compression ignition.

Claims (5)

1. A method for controlling valve lift shifting in an internal combustion engine having a variable valve lift system, comprising:
comparing an actual fuel supply with a fuel supply threshold value; and
at least partly based on the result of the comparison, determining whether a valve lift mode shift should be performed.
2. The method according to claim 1, wherein said fuel supply threshold value corresponds to said actual fuel supply being cut off.
3. An automotive system, comprising:
an internal combustion engine having a variable valve lift system; and
an engine control unit adapted to compare an actual engine fuel supply with a fuel supply threshold value, and at least partly based on a result of the comparison, determine whether a valve lift mode shift should be performed.
4. An automotive system according to claim 3, wherein said fuel supply threshold value corresponds to the fuel supply being cut off.
5. A method for controlling valve lift shifting in an internal combustion engine having a variable valve lift system, comprising:
performing a valve lift mode change when at least an actual engine fuel less is than or equal to a fuel supply threshold value; and
US11/556,737 2005-11-18 2006-11-06 Internal combustion engine comprising a variable valve lift system and a method for controlling valve lift shifting Abandoned US20070113805A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP05110940.3 2005-11-18
EP05110940A EP1788203B1 (en) 2005-11-18 2005-11-18 An internal combustion engine comprising a variable valve lift system and a method for controlling valve lift shifting

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080017144A1 (en) * 2006-06-28 2008-01-24 Martin Litorell Internal combustion engine comprising a variable valve lift profile system and a method for controlling valve lift profile shifting

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US4917057A (en) * 1988-08-01 1990-04-17 Honda Giken Kogyo Kabushiki Kaisha Control method for valve-timing changeover in engine
US5009203A (en) * 1988-08-01 1991-04-23 Honda Giken Kogyo Kabushiki Kaisha Control method for valve-timing changeover in engine
US5031583A (en) * 1987-06-23 1991-07-16 Robert Bosch Gmbh Valve operating device for internal combustion engine
US5287830A (en) * 1990-02-16 1994-02-22 Group Lotus Valve control means
US5881690A (en) * 1996-12-20 1999-03-16 Hyundai Motor Company System for variably controlling operation of an intake/exhaust valve for an internal combustion engine
US5950583A (en) * 1997-04-25 1999-09-14 Dr. Ing. H.C.F. Porsche Ag Valve gear of an internal-combustion engine
US6135077A (en) * 1997-11-07 2000-10-24 Toyota Jidosha Kabushiki Kaisha Valve timing changing apparatus for internal combustion engine
US6230675B1 (en) * 1999-05-19 2001-05-15 Honda Giken Kogyo Kabushiki Kaisha Intake valve lift control system
US6581564B2 (en) * 2000-09-21 2003-06-24 Honda Giken Kogyo Kabushiki Kaisha Ignition time controller, ignition time control method and engine control unit for internal combustion engine
US6837040B2 (en) * 2002-03-27 2005-01-04 Toyota Jidosha Kabushiki Kaisha In-cylinder injection type spark-ignition internal combustion engine and control method thereof

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JP2619696B2 (en) * 1988-08-01 1997-06-11 本田技研工業株式会社 Switching control method of valve timing in engine

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Publication number Priority date Publication date Assignee Title
US5031583A (en) * 1987-06-23 1991-07-16 Robert Bosch Gmbh Valve operating device for internal combustion engine
US4917057A (en) * 1988-08-01 1990-04-17 Honda Giken Kogyo Kabushiki Kaisha Control method for valve-timing changeover in engine
US5009203A (en) * 1988-08-01 1991-04-23 Honda Giken Kogyo Kabushiki Kaisha Control method for valve-timing changeover in engine
US5287830A (en) * 1990-02-16 1994-02-22 Group Lotus Valve control means
US5881690A (en) * 1996-12-20 1999-03-16 Hyundai Motor Company System for variably controlling operation of an intake/exhaust valve for an internal combustion engine
US5950583A (en) * 1997-04-25 1999-09-14 Dr. Ing. H.C.F. Porsche Ag Valve gear of an internal-combustion engine
US6135077A (en) * 1997-11-07 2000-10-24 Toyota Jidosha Kabushiki Kaisha Valve timing changing apparatus for internal combustion engine
US6230675B1 (en) * 1999-05-19 2001-05-15 Honda Giken Kogyo Kabushiki Kaisha Intake valve lift control system
US6581564B2 (en) * 2000-09-21 2003-06-24 Honda Giken Kogyo Kabushiki Kaisha Ignition time controller, ignition time control method and engine control unit for internal combustion engine
US6837040B2 (en) * 2002-03-27 2005-01-04 Toyota Jidosha Kabushiki Kaisha In-cylinder injection type spark-ignition internal combustion engine and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080017144A1 (en) * 2006-06-28 2008-01-24 Martin Litorell Internal combustion engine comprising a variable valve lift profile system and a method for controlling valve lift profile shifting
US8151748B2 (en) 2006-06-28 2012-04-10 Volvo Car Corporation Internal combustion engine comprising a variable valve lift profile system and a method for controlling valve lift profile shifting

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Publication number Publication date
EP1788203B1 (en) 2010-07-14
EP1788203A1 (en) 2007-05-23
DE602005022322D1 (en) 2010-08-26

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