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
  • F02D13/0253—Fully variable control of valve lift and timing using camless actuation systems such as hydraulic, pneumatic or electromagnetic actuators, e.g. solenoid valves
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L9/00—Valve-gear or valve arrangements actuated non-mechanically
  • F01L9/20—Valve-gear or valve arrangements actuated non-mechanically by electric means
• • 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
• • 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
  • F02D41/22—Safety or indicating devices for abnormal conditions
• • 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
  • F02D41/24—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means
  • F02D41/26—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor
  • F02D41/266—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using computer, e.g. microprocessor the computer being backed-up or assisted by another circuit, e.g. analogue
• • 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
  • F01L2800/12—Fail safe operation
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D2200/00—Input parameters for engine control
  • F02D2200/02—Input parameters for engine control the parameters being related to the engine
  • F02D2200/021—Engine temperature
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D2200/00—Input parameters for engine control
  • F02D2200/02—Input parameters for engine control the parameters being related to the engine
  • F02D2200/023—Temperature of lubricating oil or working fluid
• • 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
• • 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

• a control unit of one or more electromagnetic valve actuators of a heat engine and different sets of such control units and such electromagnetic actuators.
• the present invention relates to a control unit of one or more electromagnetic valve actuators of a heat engine, such as those used to move motor vehicles. It also relates to different sets of such control units and such electromagnetic actuators.
• a heat engine generally comprises cylinders which define combustion chambers closed on one side by a cylinder head and on the other by an alternating piston connected to a crankshaft.
• the engine comprises fuel intake ducts in the combustion chambers and flue gas exhaust ducts, these ducts being respectively equipped with intake valves and exhaust valves.
• the intake and exhaust valves are actuated to obtain a four-cycle engine operating cycle, namely for each combustion chamber, an intake phase in which air and fuel are introduced into the combustion chamber. combustion, a compression phase of the mixture of air and fuel, an expansion phase in which the burnt gases resulting from the combustion of the mixture relax and an exhaust phase in which the flue gases are discharged out of the chamber of combustion, successive phases in each cylinder on two turns of crankshaft.
• each valve it is known to use an electromagnetic valve actuator piloted by a control unit connected by connecting means to a main engine management unit of the engine, namely the engine control unit or ECU (English Engine Control Unit) which has in memory of several cartographies in function for example of the outside temperature, the engine load, driving modes ...
• the control unit acts under the effect of a control program to control the electromagnetic actuator according to a signal of piloting transmitted by the main management unit via the means of liaison.
• the control signal determines opening and closing angles in a cycle of 720 ° of the crankshaft after a top dead center reference of the piston of the cylinder concerned, and also the water temperature, the oil temperature, the speed engine...
• This system makes it possible to obtain better performances for the engine.
• the control unit can not control the actuator, thus causing a stop of the engine.
• a control unit of one or more electromagnetic actuators of the engine valve said control unit being adapted to be connected by connecting means to a main management unit of the heat engine, the control unit acting under the effect of at least a first control program for controlling the actuator (s) as a function of a signal transmitted to the control unit by the main management unit via the connecting means.
• the control unit comprises a memory containing palliative information and, in case of interruption of the signal, the control unit implements a second control program for controlling the actuators or actuators as a function of the palliative information.
• control unit can continue to drive the actuator thus allowing the vehicle to operate and for example to win a garage for a repair.
• the actuator then behaves in fact like a conventional camshaft providing control of the actuator according to a fixed control profile.
• the palliative information comprises the opening and closing angles of the valve as a function of a speed of the heat engine.
• Said control unit may comprise an internal processing unit making it possible to convert a valve opening / closing order into an electric current, said primary, said instruction depending on said signal transmitted to the control unit by the main unit or in case of interruption of the signal, said palliative information.
• Said control unit operates permanently, for example, either in slave mode with respect to the main management unit, or in stand-alone mode, in the event of signal interruption.
• the unit may further comprise a voltage converter, able to deliver to said actuator (s) a secondary current whose value of the voltage depends on the voltage value of said primary current.
• the invention also relates to a set of pairs consisting of a said control unit as described above and a said electromagnetic actuator controlled by said control unit.
• said set comprises means for synchronizing the control units of said pairs.
• the invention further relates to an assembly of a unit control unit as described above and said electromagnetic actuators, controlled by said control unit.
• said control unit of said set is provided remote from said actuators.
• FIG. 1 is a schematic perspective view of a heat engine according to the invention
• FIG. 2 is a partial schematic cross sectional view of this engine.
• the heat engine comprises a block 10 defining four cylinders 1, 2, 3, 4 in line.
• Each cylinder 1, 2, 3, 4 defines a chamber 5 closed on one side by a cylinder head 6 and on the other side by a piston 7 movable to slide in the cylinder 1, 2, 3, 4 between two extreme positions ( top dead center and bottom dead center) and connected by a rod 8 to a crankshaft 9 pivotally mounted in the block 10.
• each combustion chamber 5 open an intake duct 11 and an exhaust duct 12 which are formed in the cylinder head 6.
• the intake duct 11 and the exhaust duct 12 are respectively equipped with a gas valve.
• intake 13 and an exhaust valve 14 moved between two open and closed positions by electromagnetic actuators 15, 16 respectively.
• Each electromagnetic actuator 15, 16 is controlled by a control unit symbolized at 19, 20. In in another embodiment, such actuators may be provided only at the inlet or only at the exhaust.
• a spark plug 17 is mounted on the cylinder head 6 to open into the combustion chamber 5.
• the spark plug 17 is connected to an ignition circuit known in itself and not shown here.
• An injector 18 of a fuel supply device is also mounted on the cylinder head 6.
• the engine further comprises a main management unit (or ECU, "Engine Control Unit”).
• This main management unit represented with the reference 21, is connected in particular to the injectors 18, the electromagnetic actuators 15, 16, and the ignition circuit for controlling them.
• the management unit 21, itself known, comprises, for example, a processing module 22 or calculation module such as a processor associated with a memory 23 containing programs executed by the processing module 22.
• each of the cylinders is a four-stroke cycle comprising an intake phase (or time), a compression phase, an expansion phase and an exhaust phase.
• Each phase represents a quarter cycle of operation, ie a half-turn of crankshaft.
• the management unit 21, which is connected by connecting means 24, 25 to the control units 19, 20 of the electromagnetic actuators 15, 16, transmits to the control units 19, 20 a signal which determines angles of opening and closing of the concerned valve on a cycle of 720 °, the water and oil temperatures, a reference top of a top dead center ... to allow the control units 19 , 20 to control the electromagnetic actuators 15, 16 according to the information contained in the received signal.
• control unit comprises a memory 26, 27 containing palliative information including, in particular, angles of opening and closing of the valve as a function of the engine speed.
• the control unit 19, 20 executes a specific control program in using the palliative information contained in the memories 26, 27.
• the palliative information makes it possible to drive the actuators in a profile corresponding to a standard pipe, that is to say resulting from a compromise between fuel consumption and performances.
• the control unit is an intelligent unit, always active, operating, for example, either in slave mode relative to the main management unit, or in standalone, in case of interruption of the signal.
• Said control unit further comprising, for example, an internal processing unit for converting a valve opening / closing command, into an electrical current, said primary, said current depending on said signal transmitted to the control unit by the main unit or, in case of interruption of the signal, said palliative information.
• Said control unit may also include, a voltage converter, capable of delivering to said one or more actuators a secondary current whose value of the voltage depends on the voltage value of said primary current.
• Said control unit may, according to a first example, not shown, be the same for all the actuators. It is provided remotely and connected by an electrical connection, for currents intended to feed a coil of an electromagnet, to each of the actuators.
• Synchronization means are provided to ensure the desired mode of operation of the engine on all the cylinders, for example by relating the internal processing units of each of said control units which can thus be timed relative to each other.
• palliative information can be directed to a driving profile of the actuator corresponding to a sporty driving, that is to say, optimized to prioritize engine performance.
• the memory 26, 27 may contain several control programs and different palliative information.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Computer Hardware Design (AREA)
• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Valve Device For Special Equipments (AREA)
• Output Control And Ontrol Of Special Type Engine (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)

Applications Claiming Priority (1)

Publications (1)

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Family Applications (1)

Country Status (7)

Families Citing this family (2)

Family Cites Families (20)

• 2008
  • 2008-07-30 EP EP08875608A patent/EP2307674A1/de not_active Withdrawn
  • 2008-07-30 US US13/056,330 patent/US20110178696A1/en not_active Abandoned
  • 2008-07-30 KR KR1020117004316A patent/KR20110047202A/ko not_active Application Discontinuation
  • 2008-07-30 CN CN2008801313398A patent/CN102171421A/zh active Pending
  • 2008-07-30 MY MYPI2011000420A patent/MY159652A/en unknown
  • 2008-07-30 WO PCT/FR2008/001133 patent/WO2010012870A1/fr active Application Filing
  • 2008-07-30 JP JP2011520536A patent/JP5385386B2/ja not_active Expired - Fee Related

Non-Patent Citations (1)

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