Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
  • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
  • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
• • 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
  • F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
• • 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
  • F02D41/18—Circuit arrangements for generating control signals by measuring intake air flow
• • 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
  • Y02T10/40—Engine management systems

Definitions

• the invention is based on a diagnostic method according to the type of the main claim.
• the working behavior of the internal combustion engine is influenced by variations in the intake / exhaust valve control and / or by variations in the intake manifold or intake tract geometry.
• the intake / exhaust valve control takes place either between two actuator options, e.g. B. in the camshaft changeover, instead of or the intake / exhaust valve control takes place continuously such.
• the resonance charging of the combustion chambers in the respective operating state of the internal combustion engine is optimized by variations in the intake manifold or intake tract geometry, whereby an increased air supply into the combustion chambers of the internal combustion engine is made possible with the other unchanged position of other actuators, in particular the throttle valve.
• other actuators in particular the throttle valve.
• the variations occur either discontinuously, e.g. B. by actuating resonance flaps in the intake manifold or intake tract, or the variations take place continuously by controlling a number of actuating options of one or more actuators.
• EP-A 170 018 a method for self-diagnosis of an actuator of an idle charge control in internal combustion engines is known.
• an arbitrary actuator control for diagnosis is used for diagnosis of the actuator, i. H. that instead of the controls of the actuators to be diagnosed which optimize the other operational sequences, one or more defined actuator controls take place and their effects on other operating data of the internal combustion engine are analyzed.
• the diagnosis can therefore only take place during certain, in particular stationary, operating states, since otherwise the program-specific, ie. H. would be disturbed by further actuators optimized operation of the internal combustion engine in its process.
• the diagnostic method according to the invention enables diagnosis of the actuators for varying intake / exhaust valve control and / or for varying the intake manifold or intake tract geometry in the case of actuator controls which take place within the framework of the programmable controls of the internal combustion engine which optimize the operating sequence , without additional hardware effort, e.g. B. in the form of position indicators to require.
• the data already present during normal operation of the internal combustion engine can be used for diagnosis for the diagnostic method presented here. It is particularly advantageous that the area accessible to diagnosis is not limited to the control device of the actuating device and the actuator itself. Rather, the diagnosed Area extended by this method according to the invention to all elements of the chain of effects with the variable intake manifold or intake tract geometry and / or the intake / exhaust valve control.
• the diagnostic method for checking actuators for controlling an internal combustion engine is to be shown on the basis of a block diagram.
• the actuators to be diagnosed are those for variations in the intake manifold or intake tract geometry and / or for variations in the intake / exhaust valve control.
• position 1 denotes an internal combustion engine, to which the air required for combustion is supplied through an intake manifold 2 or an intake tract.
• Position 3 summarizes actuators for varying the intake manifold or intake tract geometry and position 4 controls for varying the intake / exhaust valve control.
• the actuators to be diagnosed are controlled by control units, which are summarized in position 5 for the sake of clarity.
• B the measured by an air flow meter or air mass meter 6 air volume or air mass QL supplied.
• the control of both the variations in the intake manifold or intake tract geometry 3 and the variations in the intake / exhaust valve control 4 cause the operating point of the internal combustion engine 1 to change. This changes a or Several operating data that can only be attributed indirectly to this actuator control of the actuators 3 and 4. So changes z. B. the amount of air or air mass QL sucked in through the suction pipe or the intake tract 2, which is measured by the air flow meter or air mass meter 6.
• the control device 5 controls depending on the operating parameters of the internal combustion engine 1, in particular the speed n and / or the load L, the actuators for varying the intake manifold or intake tract geometry 3 and / or the actuators for varying the intake / exhaust valve control 4. It can now two methods of diagnosis can be used:
• control signals of the actuators to be diagnosed which are within the scope of the program, ie. H. the controls that optimize the operating sequence of the internal combustion engine take place, fed to the diagnostic unit 7.
• the air volume or air mass QL measured by the air flow meter or air mass meter 6 is stored as actual values and compared with stored target values. Either individual actuator variations are compared with corresponding setpoints, or the entire actuator variations are compared with stored function profiles.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Output Control And Ontrol Of Special Type Engine (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)
• Valve Device For Special Equipments (AREA)
• Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
• Testing Of Engines (AREA)
• Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6400966

Family Applications (1)

Country Status (6)

Families Citing this family (16)

Family Cites Families (9)

• 1990
  • 1990-02-26 DE DE4005973A patent/DE4005973A1/de active Granted
  • 1990-12-13 WO PCT/DE1990/000960 patent/WO1991013246A1/de not_active Application Discontinuation
  • 1990-12-13 EP EP19910900164 patent/EP0470211A1/de not_active Ceased
  • 1990-12-13 US US07/768,413 patent/US5249459A/en not_active Expired - Lifetime
  • 1990-12-13 JP JP3500927A patent/JPH04505489A/ja active Pending
• 1991
  • 1991-10-26 KR KR1019910701451A patent/KR920701632A/ko not_active Ceased
• 2001
  • 2001-05-31 JP JP2001163750A patent/JP2002030973A/ja active Pending

Non-Patent Citations (1)

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