Classifications

• • 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
  • F02D41/14—Introducing closed-loop corrections
  • F02D41/1497—With detection of the mechanical response of the engine
• • 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
  • F02D41/14—Introducing closed-loop corrections
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
  • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
  • B60W10/06—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of combustion engines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
  • B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
  • B60W10/08—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units including control of electric propulsion units, e.g. motors or generators
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W20/00—Control systems specially adapted for hybrid vehicles
  • B60W20/50—Control strategies for responding to system failures, e.g. for fault diagnosis, failsafe operation or limp mode
• • 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
  • F02D41/008—Controlling each cylinder individually
  • F02D41/0087—Selective cylinder activation, i.e. partial cylinder 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
  • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines
  • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
  • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
  • B60K6/48—Parallel type
  • B60K2006/4825—Electric machine connected or connectable to gearbox input shaft
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
  • B60W50/02—Ensuring safety in case of control system failures, e.g. by diagnosing, circumventing or fixing failures
  • B60W50/0205—Diagnosing or detecting failures; Failure detection models
  • B60W2050/021—Means for detecting failure or malfunction
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
  • B60W2510/00—Input parameters relating to a particular sub-units
  • B60W2510/24—Energy storage means
  • B60W2510/242—Energy storage means for electrical energy
  • B60W2510/244—Charge state
• • 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
  • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
  • F02D2200/1002—Output torque
  • F02D2200/1004—Estimation of the output torque
• • 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
  • F02D2250/24—Control of the engine output torque by using an external load, e.g. a generator
• • 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
  • F02D41/2406—Electrical control of supply of combustible mixture or its constituents characterised by the use of digital means using essentially read only memories
  • F02D41/2425—Particular ways of programming the data
  • F02D41/2429—Methods of calibrating or learning
  • F02D41/2451—Methods of calibrating or learning characterised by what is learned or calibrated
  • F02D41/2464—Characteristics of actuators
  • F02D41/2467—Characteristics of actuators for injectors
  • F02D41/247—Behaviour for small quantities
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
  • F02P19/00—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition
  • F02P19/02—Incandescent ignition, e.g. during starting of internal combustion engines; Combination of incandescent and spark ignition electric, e.g. layout of circuits of apparatus having glowing plugs
  • F02P19/027—Safety devices, e.g. for diagnosing the glow plugs or the related circuits
• • 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
  • Y02T10/60—Other road transportation technologies with climate change mitigation effect
  • Y02T10/62—Hybrid vehicles

Definitions

• the invention relates to a method for operating a drive device, which for providing a drive torque one more, in one
• each one torque contributing cylinder delivering internal combustion engine and at least one operatively connected thereto
• Electric machine includes.
• the invention relates to a computer program product with a program code stored on a machine-readable carrier for
• Machine comprising, for providing a drive torque
• each of the cylinders of the engine provides a torque contribution.
• selected cylinders of the internal combustion engine are activated or deactivated in a separate operating mode.
• the inventive method is characterized in that in a diagnostic mode, a cylinder-selective measurement at least one
• Cylinder be simulated by the electric machine.
• the method according to the invention has the advantage that the drive torque is retained overall, so that a driver of a vehicle having the drive device does not feel any difference, while at the same time only operating the cylinder to be measured and thus its characteristic
• Drive device in the diagnostic mode with respect to the drive torque as well as in the normal operating mode can also be increased or reduced during the diagnostic mode. This makes it possible, in particular by providing only a single sensor, which is provided in the common exhaust tract of the cylinder, the cylinder-specific measurement of the characteristic
• the diagnostic mode is set as a function of a torque which can currently be produced by the electric machine or performed. This will ensure that the
• Electric machine also always the torque contributions of the remaining cylinders can simulate at least for a minimum period. If the electric machine is not able to reproduce the torque contributions of the other cylinders, the diagnostic mode is disabled, otherwise a sudden
• the diagnostic mode is preferably set or performed as a function of a current state of charge of an energy store assigned to the electric machine. It is provided in particular that, when the current state of charge of the energy storage device falls below a predefinable threshold, the diagnostic mode is disabled.
• the diagnostic mode takes place until the characteristic operating variable of the cylinder to be measured has been detected.
• Cylinders are thus simulated by the electric machine until the characteristic operating size of the cylinder to be measured has been reliably and clearly recorded.
• this time duration is limited as a function of the current state of charge of the electric machine, as described above, so that an overstressing of the
• the diagnostic mode is carried out until the exhaust gas mixture of the remaining cylinders has been discharged and thus only the exhaust gas of the cylinder to be measured is available.
• the characteristic operating variable is measured successively in all cylinders.
• a cylinder is always operated, while the torque contributions of the remaining cylinders are simulated by the electric machine.
• another of the cylinders provides its torque contribution, while the others, including the previously torque-supplying cylinder, are deactivated and simulated by the electric machine.
• the characteristic operating variable for each of the cylinders is clearly measured or determined.
• in the diagnostic mode is carried out until the exhaust gas mixture of the remaining cylinders has been discharged and thus only the exhaust gas of the cylinder to be measured is available.
• Diagnostic mode only a suspicious cylinder measured and in particular then the diagnostic mode is terminated again. Under a
• Suspicious cylinder is here to understand a cylinder of the internal combustion engine, which is suspected, not a target value with respect to the
• the suspicious cylinder for example, due to a
• intake and / or exhaust valves of the remaining cylinders are closed in the diagnostic mode in order to measure the cylinder-specific gas exchange of the operated cylinder.
• the drive device or the internal combustion engine is equipped with a corresponding valve drive, which allows an individual actuation of its valves. If the inlet and outlet valves of the other cylinders are closed, air is only delivered through the cylinder to be measured, so that the cylinder-specific influence of the air is measured.
• the electric machine while the cylinder to be measured makes its contribution to torque, the electric machine generates a supporting or counteracting torque.
• the electric machine acts to assist or counteract, while the cylinder makes a lower or higher torque contribution in relation to the actual nominal contribution.
• the cylinder to be measured provides an increased torque in the diagnostic mode or is filled or supplied with an increased fuel quantity, whereby the characteristic operating variable can be detected more easily or more clearly. This affects the
• the device according to the invention is characterized by a special
• the control unit is preferably associated with at least one sensor for detecting the characteristic operating variable, as well as interfaces that allow the control unit to control the internal combustion engine and the electric machine as described above in order to control the
• the computer program product according to the invention is characterized by a program code for carrying out the method described above when the program is executed on a computer.
• Figure 1 is a drive device in a simplified representation
• FIG. 2 shows an advantageous method for operating the drive device in a block diagram.
• FIG. 1 shows a drive device 1 for a motor vehicle, which has a
• Combustion engine 2 and an electric machine 3 includes. Of the
• the drive device 1 further comprises a device 7, at least with the internal combustion engine 2 and the
• Electric machine 3 is connected to control this. Furthermore, the
• Device 7 is connected to a sensor 8, which is arranged in an exhaust tract 9 of the internal combustion engine 2, to at least a certain size of the exhaust gas, such as the oxygen content of the exhaust gas detected.
• the internal combustion engine 2 has a plurality of cylinders 10, 11, 12 and 13 whose exhaust ports open into the common exhaust tract 9, so that all the exhaust gases of the cylinders 10-13 are guided past the sensor 8.
• Drive device 1 is described, which is carried out in particular by the device 7, which for this purpose has a specially prepared control unit, which contains corresponding means for carrying out the method.
• a first step 14 the drive device 1 is put into operation and preferably set a normal operation.
• normal operation here is an operation to understand in which all cylinders 10-13 of the engine 2 make a contribution to torque, which acts on the drive shaft 6 with the clutch 4 closed.
• a diagnostic mode is activated in which a cylinder-selective measurement of at least one characteristic operating variable takes place by means of the sensor 8.
• a fuel-air ratio by means of the sensor 8 designed as a lambda probe
• a known from the prior art method is preferably used, in which, depending on the angle of rotation of the crankshaft of the internal combustion engine 1, which is detected by a crankshaft sensor, determines the time at which the exhaust gas of a particular cylinder of the cylinders 10 to 12 the Sensor 8 happens. If it is ascertained that one of the cylinders delivers an implausible or unexpected value of the recorded operating variable, this becomes
• the current state of charge of an electric energy store 22 assigned to the electric machine 3, which was previously detected in a step 17, is compared with a threshold value which was predetermined beforehand, for example during application of the drive device. If the current state of charge is below the threshold value, the diagnostic program is either aborted or suspended until the state of charge reaches a value that is above the threshold value. This can be achieved for example by an operation of the drive device in one generator mode can be achieved when the electric machine 3 is driven by the internal combustion engine 2. Additionally or alternatively, the operating range of the internal combustion engine 2 is checked in a step 18 and decided whether the electric machine 3 can emulate the missing torque contributions of the remaining cylinders 1 1 -13, ie whether the power of the electric motor
• Threshold is moved further (j) to a further step 19, in which the internal combustion engine 2 is driven such that the previously suspected in step 15 cylinder, for example, 10, for delivering his
• Torque contribution is controlled while the remaining cylinder 1 1 to 13 disabled, so are no longer used or fired.
• Torque contributions of the remaining cylinders 1 1 -13 simulates.
• the electric machine 3 simulates the missing torque contributions of the cylinders 1 1, 12 and 13, so that the same drive torque continues to be applied to the drive axle 6 and, in particular, the driver does not notice a difference in the driving behavior, except maybe an acoustic difference.
• Exhaust valves of the remaining cylinders 1 1 -13 are closed, so that no air is pumped through the cylinders 1 1 -13 and mixed with the exhaust gas of the cylinder 10.
• the sensor 8 detects only the exhaust gas leaving the cylinder 10, whereby the influence of the cylinder 10 on the characteristic operating variable to be measured is detected very accurately.
• the diagnostic mode is maintained until the characteristic
• Timing of fuel, the ignition timing or the opening times and / or strokes of the inlet and / or outlet valves of each cylinder perform.
• only corresponding sensors or means must be provided which enable the detection of the respective value.
• the engine speed signal is fed directly to a control unit of the electric machine 3.
• the diagnostic program or the diagnostic mode is ended in a concluding step 21.
• the cylinder-selective measurement is performed for one cylinder after the other, so that one cylinder is always operated and the torque contributions of the other cylinders by the
• Electric machine 3 are readjusted, with only the cylinder to be measured is supplied with fuel and ignited if necessary.
• step 15 is omitted, wherein all cylinders of the internal combustion engine 2 or the values of all cylinders 10-13 are measured in succession according to steps 19 and 20.
• the at least one sensor 8 in particular in the described embodiment as a lambda sensor, in the exhaust tract 9 in the immediate vicinity of the merger or mixing point of
• Exhaust valve positions synchronously or synchronously, for example every millisecond done. If the measured values of different sensors in a different installation location in the exhaust gas tract 9 are compared or offset, the transit times in the exhaust gas tract can be taken into account or also determined by modeling.
• Electric machine 3 to generate an opposite or mit foundedes or supporting torque, while the cylinder to be measured provides its torque contribution.
• the cylinder to be measured can be supplied with an excess amount of an injection quantity and the unwanted excess amount of the torque for the total drive power can be compensated by the electric machine 3.
• the advantageous method is preferably used in the workshop diagnosis, where, for example, by integrating external exhaust gas analyzers and other measuring devices that include, for example, acoustic sensors, the cylinder-specific diagnostic options are further improved.
• the electric machine 3 preferably tows the internal combustion engine 2 to a diagnostic operating point, so that a cylinder-specific diagnosis is advantageously also made possible during the start and / or warm-up phase.
• the influence of the driver and the driving cycle of the real driving operation is here preferably hidden. Desired operating conditions for
• Friction loss characteristic map of the internal combustion engine 2 is not limited to a drive device whose
• Combustion engine and electric machine as shown in Figure 1 are interconnected.
• internal combustion engine 2 and electric machine 3 for example, also be connected in parallel. It is also conceivable to connect the internal combustion engine 2 to a drive axle, and the electric motor 3 to another drive axle of the same motor vehicle.

Landscapes

• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Transportation (AREA)
• Automation & Control Theory (AREA)
• General Health & Medical Sciences (AREA)
• Biomedical Technology (AREA)
• Health & Medical Sciences (AREA)
• Combined Controls Of Internal Combustion Engines (AREA)
• Output Control And Ontrol Of Special Type Engine (AREA)
• Hybrid Electric Vehicles (AREA)
• Electric Propulsion And Braking For Vehicles (AREA)
• Testing Of Engines (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

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Family Applications (1)

Country Status (7)

Families Citing this family (15)

Citations (6)

Family Cites Families (14)

• 2011
  • 2011-07-11 DE DE102011078930A patent/DE102011078930A1/de not_active Withdrawn
• 2012
  • 2012-05-16 CN CN201280034290.0A patent/CN103649504B/zh not_active Expired - Fee Related
  • 2012-05-16 JP JP2014519464A patent/JP5809748B2/ja not_active Expired - Fee Related
  • 2012-05-16 KR KR1020147000683A patent/KR101898882B1/ko not_active Expired - Fee Related
  • 2012-05-16 WO PCT/EP2012/059101 patent/WO2013007428A1/de not_active Ceased
  • 2012-05-16 EP EP20120720899 patent/EP2732146B1/de not_active Not-in-force
  • 2012-05-16 US US14/232,320 patent/US9376976B2/en not_active Expired - Fee Related

Patent Citations (6)

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