CN111212990A - Method for compensating for non-periodic behaviour in a heat engine using a rotating electrical machine - Google Patents
Method for compensating for non-periodic behaviour in a heat engine using a rotating electrical machine Download PDFInfo
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- CN111212990A CN111212990A CN201880066307.8A CN201880066307A CN111212990A CN 111212990 A CN111212990 A CN 111212990A CN 201880066307 A CN201880066307 A CN 201880066307A CN 111212990 A CN111212990 A CN 111212990A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 230000000737 periodic effect Effects 0.000 title abstract description 4
- 230000009466 transformation Effects 0.000 claims description 15
- 238000001914 filtration Methods 0.000 claims description 8
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 2
- 230000002441 reversible effect Effects 0.000 claims description 2
- 238000005474 detonation Methods 0.000 claims 1
- 230000001131 transforming effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
- F16F15/18—Suppression of vibrations in rotating systems by making use of members moving with the system using electric, magnetic or electromagnetic means
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- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
- B60K6/22—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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
- B60K6/38—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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the driveline clutches
- B60K6/387—Actuated clutches, i.e. clutches engaged or disengaged by electric, hydraulic or mechanical actuating means
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- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
- 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 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 ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
- B60K6/44—Series-parallel type
- B60K6/442—Series-parallel switching type
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- 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
- B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/20—Reducing vibrations in the driveline
- B60W2030/206—Reducing vibrations in the driveline related or induced by the engine
-
- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/06—Combustion engines, Gas turbines
- B60W2710/0666—Engine torque
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- 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
- B60W2710/00—Output or target parameters relating to a particular sub-units
- B60W2710/08—Electric propulsion units
- B60W2710/083—Torque
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Hybrid Electric Vehicles (AREA)
Abstract
The invention mainly relates to a method for compensating for non-periodic behaviour in a heat engine (12) of a motor vehicle, comprising: -a step of measuring the angular position of the shaft (17.3) or of the rotor (17.2) using a sensor (27) mounted between the mechanical damper (20) and the gearbox (13), at the position where the rotor (17.2) of the rotary electric machine (17) is arranged, -a step of determining a torque variation related to the non-periodic behaviour of the heat engine, depending on the measured angular position of the shaft (17.3) or of the rotor (17.2), -a step of subtracting/adding the torque variation from/to a reference torque set value (Cref) of the rotary electric machine (17) to determine a control torque set value (Cref') depending on the sign of the torque variation, -a step of controlling the rotary electric machine (17) to obtain the control torque set value.
Description
Technical Field
The invention relates to a method for compensating irregularities of a heat engine by means of a rotating electrical machine.
Background
The traction chain of a motor vehicle comprises, in a known manner, a heat engine coupled to a gearbox by means of a clutch. The gearbox is mechanically connected with the wheels through a differential. Typically, the crankshaft of the heat engine is connected to a mechanical damper and then to a clutch to transfer energy to the wheels through a gearbox.
In addition, a rotating electrical machine may be implanted in the traction chain to improve the energy balance of the vehicle. The electric machine may be operated in a motor mode to ensure traction of the vehicle, alone or in combination with the heat engine, in order to ensure auxiliary traction. The electric machine may also be operated in a generator mode to provide energy to a battery of the vehicle and/or a load coupled to the power grid.
In operation, the heat engine may experience torque fluctuations due to the explosion and compression of fuel within the cylinders. These torque fluctuations result in significant speed changes, which are damped by the inertia present on the shaft of the heat engine. However, despite the presence of the damper placed on the crankshaft of the heat engine, the variations are still significant, causing vibrations and design constraints of the mechanical parts.
Disclosure of Invention
The object of the present invention is to eliminate this drawback at least partially by exploiting the presence of a rotating electric machine located downstream of the mechanical damper.
To this end, the subject of the invention is a method for compensating for irregularities of a heat engine of a motor vehicle, wherein the heat engine belongs to a traction chain comprising:
-a mechanical damper;
-a rotating electrical machine comprising a rotor fitted on a shaft and comprising a stator;
-at least one clutch; and
-a gearbox for the transmission of power to the engine,
characterized in that the method comprises:
-a step of measuring the angular position of the shaft or rotor by means of a sensor, implanted between the mechanical damper and the gearbox, in a position where the rotor of the rotating electrical machine is set;
-a step of determining the torque variation associated with the irregularity of the heat engine from the measured angular position of the shaft or of the rotor;
-a step of subtracting/adding the torque variation from/to a reference torque setpoint of the rotating electrical machine to determine a control torque setpoint, according to the sign of the torque variation;
-a step of controlling the rotating electric machine to obtain a control torque setpoint.
According to one embodiment, the step of determining the torque variation comprises a step of selecting the torque variation, followed by a step of synchronous demodulation of the speed variation associated with the irregularity, so as to obtain a continuous component of the irregularity by filtering the high-frequency image.
According to one embodiment, the step of determining the torque variation further comprises the step of feedback controlling the continuous component to a reference value, for example equal to zero.
According to one embodiment, the method comprises the step of correcting the component obtained after the feedback control.
According to one embodiment, the step of determining the torque variation comprises the step of remodulating the continuous component before performing the step of subtracting/adding the resulting signal from/to the reference torque set point.
According to one embodiment, the method further comprises an optional step of correcting the phase and/or gain of the signal obtained after remodulation.
According to one embodiment, the step of determining the torque variation associated with the irregularity comprises the steps of: the measured angular position of the rotor or shaft is transformed by a transformation system operating at K times the rotational speed of the rotor or shaft, in order to obtain two output signals in quadrature, wherein only the filtered continuous components of the two output signals are retained, where K is equal to the number of explosions in the cylinder per crankshaft revolution.
According to one embodiment, the transformation system implements a transformation of the time reference, such as a Park or sin/cos transformation.
According to one embodiment, the method comprises the step of filtering each output signal of the transform system in order to isolate successive components.
According to one embodiment, the method comprises the step of feedback controlling each successive component to a reference value, for example equal to zero.
According to one embodiment, the method comprises a step of correcting each filtered signal, in particular by means of a corrector, for example of the proportional or proportional-integral type.
According to one embodiment, the method comprises the steps of: each filtered signal is subjected to an inverse transformation of the time reference, and the signal obtained from the summation or addition of the signals of the inverse transformation operation is added to or subtracted from the reference torque set point.
According to one embodiment, the method comprises the following optional previous steps: the phase and/or gain of the signal obtained from the combination of the signals of the inverse transform operation is corrected.
According to one embodiment, the steps of the method, in particular the steps of transforming, filtering, feedback control and inverse transforming, are carried out in parallel for different harmonics of the torque associated with the irregularity;
-and the method additionally comprises the step of summing or adding the signals processed for these different harmonics to obtain a resulting signal;
-the result signal is added to or subtracted from a reference torque set point.
According to one embodiment, the rotating electrical machine is arranged between the clutch and the heat engine.
According to one embodiment, the rotary electric machine is arranged between two clutches to allow an electric drive mode and a thermal drive mode of the motor vehicle.
The invention also relates to a system for compensating irregularities of a heat engine of a motor vehicle, the heat engine belonging to a traction chain comprising:
-a mechanical damper;
-a rotating electrical machine comprising a rotor fitted on a shaft and comprising a stator;
-at least one clutch; and
-a gearbox for the transmission of power to the engine,
characterized in that the system comprises:
-a sensor for measuring the angular position of the shaft or rotor, the sensor being implanted between the mechanical damper and the gearbox, in a position where the rotor of the rotating electrical machine is set;
-determination means for determining the torque variation associated with the irregularity of the heat engine from the measured angular position of the shaft or of the rotor;
-subtracting or adding means for subtracting/adding the torque variation from/to a reference torque setpoint of the rotating machine, depending on the sign of the torque variation, to determine a control torque setpoint;
-control means for controlling the rotating electrical machine to obtain a control torque setpoint.
Drawings
The invention will be better understood upon reading the following description and upon reference to the accompanying drawings. These drawings are provided by way of illustration only and in no way limit the invention. In the drawings:
fig. 1a and 1b are schematic diagrams showing an embodiment of a traction chain for a motor vehicle with which the method for compensating for irregularities of a heat engine according to the invention is implemented;
FIG. 2a is a schematic view of a first embodiment of a system for compensating for irregularities of a heat engine according to the present invention;
FIG. 2b is a diagram of the steps of a method according to the invention implemented with a system for compensating for irregularities in FIG. 2 a;
FIG. 3a is a schematic diagram of a second embodiment of a functional block according to the present invention that enables determination of torque variations associated with irregularities of the heat engine;
FIG. 3b is a schematic illustration of the steps of a method according to the invention implemented with a system for compensating irregularities according to the invention comprising the functional blocks in FIG. 3 a;
fig. 4a and 4b show embodiments of the method according to the invention for different harmonic parallelisms of the torque associated with an irregularity, with and without the use of a pendulum device for damping the irregularity, respectively.
Detailed Description
Identical, similar or analogous elements retain the same reference numerals from one figure to the other.
Fig. 1a and 1b show a traction chain 10 implanted on a drive train 11 of a motor vehicle.
The traction chain 10 comprises a heat engine 12 and a gearbox 13, the gearbox 13 being provided with at least one input shaft 13.1 and one output shaft 13.2, which output shaft 13.2 is connected to the wheels via a differential 16. The clutch K1 is interposed between the heat engine 12 and the input shaft 13.1 of the gearbox 13.
A rotary electric machine 17 of the reversible type is provided between the clutch K1 and the heat engine 12. More specifically, the electric machine 17 is disposed between the clutch K1 and the mechanical damper 20 fitted on the crankshaft of the heat engine 12.
The electric machine 17 can be operated in generator mode during the regenerative braking phase, supplying the network with current, for example in order to charge a battery (not shown), and the electric machine 17 can be operated in motor mode, in order to assist the heat engine 12, and if applicable, the clutch K0 is opened to ensure the electric drive of the vehicle, as shown in fig. 1 b.
Advantageously, as shown in fig. 2a, the mechanical damper 20, the electric machine 17 and the clutch K1 are contained in a single housing 21.
As shown in fig. 1a and 1b, an optional rotary electric machine 24 may be coupled to the heat engine 12 via a front face on the accessory facade belt. The means 25 for transmitting motion between the heat engine 12 and the electric motor 24 may comprise, for example, a belt cooperating with pulleys supported by the crankshaft and the shaft of the electric motor 24, respectively. The electric machine 24, commonly referred to as an alternator-starter, may be operated in a generator mode to charge a battery of the vehicle, and in a motor mode to ensure starting of the heat engine 12 when the vehicle is stationary or during a transition from an electric drive mode to a thermal drive mode.
The operating voltage of the motor 17 is in the range of 48V to 300V. The operating voltage of the motor 24 is in the range of 12V to 48V. According to one embodiment, the motor 17 is of the 48V or 300V type and the motor 24 is of the 12V or 48V type. The electric machines 17, 24 may be, for example, synchronous type machines with permanent magnets and/or machines synchronized with a wound rotor, respectively.
In the embodiment of fig. 1b, a second clutch K0 is used. The motor 17 is fitted between the first clutch K1 and the second clutch K0. Thus, in the electric mode of operation, clutch K0 is open and K1 is closed. In the thermal operating mode, both clutches K0 and K1 are closed.
With reference to fig. 2a and 2b, a description of a first embodiment of a system and method for compensating for irregularities of a heat engine 12 according to the present invention is provided below.
In step 100, the sensor 27 performs a measurement Mes _ pos of the angular position of the shaft 17.3 or the rotor 17.2. The sensor 27 is implanted between the mechanical damper 20 and the gearbox 13 at the location where the rotor 17.2 of the motor 17 is arranged.
In step 101, the function block 28 then determines from the measured angular position Mes _ pos of the shaft 17.3 or of the rotor 17.2 the torque variation associated with the irregularity of the heat engine 12.
To this end, in step 102, the module 29 performs a selection of the torque variations and then a synchronous demodulation of the speed variations associated with the irregularities, so as to filter the high-frequency images by means of the filter 30 to obtain the continuous component of the irregularities.
In step 103, the module 31 performs a feedback control of the continuous component to a reference value R, for example equal to zero.
In step 104, the component obtained by the module 31 is corrected by a corrector module 32, for example of the proportional-integral type.
In step 105, the module 33 performs a remodulation of the continuous component.
In step 106, the phase and/or gain of the signal obtained after remodulation can be corrected via modules 35.1 and 35.2, respectively.
In step 107, the torque variation is subtracted from or added to the reference torque setpoint Cref of the rotating electrical machine 17 by the module 34, according to the sign of the torque variation, to determine a control torque setpoint Cref' incorporating the torque variation to be applied in order to compensate for the irregularities of the heat engine 12.
The rotating electrical machine 17 is then controlled in step 108 to obtain a control torque setpoint Cref'.
To this end, the control torque setpoint Cref' is applied in a conventional torque feedback control chain 36 of the electric machine 17. The chain 36 comprises a comparator 37 to compare the input control torque signal Cref' with the output signal of a model 38 of the rotating electric machine 17. This model 38 relates to a power module 39 with a rectifier bridge of transistors, also having an inverter function, to inject a current into the phase windings of the stator 17.1, so as to obtain the desired control torque setpoint Cref' on the shaft 17.3 of the rotor 17.2 fitted with the machine 17. The output signal of the comparator 37 is advantageously corrected by means of a corrector 42, for example of the PI (proportional-integral) type.
With reference to fig. 3a and 3b, a description of a second embodiment of a system and method for compensating for irregularities of a heat engine 12 according to the present invention is provided below.
As previously described, in step 200, the sensor 27 performs a measurement Mes _ pos of the angular position of the shaft 17.3 or of the rotor 17.2. The sensor 27 is implanted between the mechanical damper 20 and the gearbox 13 at the location where the rotor 17.2 of the electrical machine is arranged.
In step 201, the function block 28 then determines the torque variation associated with the irregularity of the heat engine 12 from the measured angular position Mes _ pos of the shaft 17.3 or of the rotor 17.2.
For this purpose, in step 202, the system 45 transforms the measured angular position of the rotor 17.2 or of the shaft 17.3 by means of a transformation system operating at K times the rotation speed θ of the rotor 17.2 or of the shaft 17.3, so as to obtain two output signals xD and xQ in quadrature, leaving only their continuous components passing through the filtering. K is specified to be equal to the number of explosions in the cylinder per crankshaft revolution.
In other words, K corresponds to an irregularity present on the crankshaft of the heat engine 12. K2 will be used for a heat engine with 4 cylinders, K1.5 will be used for a heat engine with 3 cylinders, and K3 will be used for a heat engine with 6 cylinders, etc.
Advantageously, the transformation system 45 implements a transformation of the time reference, such as a Park or sin/cos transformation.
In step 203, module 46 filters each output signal of transformation system 45 to isolate successive components.
In step 204, the module 47 performs a feedback control of each successive component to a reference value R, for example equal to zero.
In step 205, each filtered signal is corrected, in particular by means of a corrector 48, for example of the proportional or proportional-integral type.
In step 206, system 49 performs an inverse transformation of the time reference on each filtered signal.
In step 207, the module 50 performs a summation or addition of the signals of the inverse transformation operation to obtain a signal corresponding to the variation of the torque.
Optionally, in step 208, the phase and/or gain of the signals obtained from the combination of the signals of the inverse transform operation may be corrected separately via modules 35.1 and 35.2 (see fig. 2 a).
In step 209, the control torque setpoint Cref' incorporating the torque variation to be applied in order to compensate for the irregularities of the heat engine 12 is determined by the module 34 subtracting the corresponding torque variation from or adding it to the reference torque setpoint Cref of the rotary electric machine 17, according to the sign of the corresponding torque variation.
The rotating electrical machine 17 is then controlled in step 210 in order to obtain a control torque setpoint Cref'.
To this end, the control torque setpoint Cref' is applied in a conventional torque feedback control chain 36 of the electric machine 17. The chain 36 comprises a comparator 37 to compare the input control torque signal Cref' with the output signal of a model 38 of the rotating electric machine 17. This model 38 relates to a power module 39 with a rectifier bridge of transistors, also having an inverter function, to inject a current into the phase windings of the stator 17.1, so as to obtain the desired control torque setpoint Cref' on the shaft 17.3 of the rotor 17.2 fitted with the machine 17. The output signal of the comparator 37 is advantageously corrected by means of a corrector 42, for example of the PI (proportional-integral) type.
As shown in fig. 4a, the steps of the method, in particular the steps of transforming, filtering, feedback control and inverse transforming performed by the function block 28, are performed in parallel for different harmonics of the torque associated with the irregularity. For this purpose, the corresponding transformation system 45 operates at 2.N.K times the rotation speed θ of the rotor 17.2 or shaft 17.3, where N is the harmonic order being processed.
The module 50 then performs a summation or addition of the signals for these different harmonic processes to obtain a resulting signal.
The resulting signal is then added to or subtracted from the reference torque setpoint, as previously described.
In the case of filtering irregularities of the heat engine using oscillating devices, as shown in fig. 4b, the module performing the filtering of the 1 st harmonic (which has been filtered by the oscillating device) can be eliminated.
It will be understood that the above description is provided by way of example only and does not limit the field of the invention, which will not constitute a departure from the invention by replacing different elements with any other equivalent.
In addition, different features, variations and/or embodiments of the present invention may be associated with each other according to various combinations, as long as they are not incompatible or mutually exclusive.
Claims (10)
1. Method for compensating for irregularities of a heat engine (12) of a motor vehicle, said heat engine (12) belonging to a traction chain (10) comprising:
a mechanical damper (20);
a rotating electrical machine (17) comprising a rotor (17.2) fitted on a shaft (17.3) and comprising a stator (17.1);
at least one clutch (K0, K1); and
a gear box (13),
characterized in that the method comprises:
a step (100,200) of measuring the angular position of the shaft (17.3) or of the rotor (17.2) by means of a sensor (27), the sensor (27) being implanted between the mechanical damper (20) and the gearbox (13), in a position where the rotor (17.2) of the rotary electric machine (17) is set;
a step (101,201) of determining a torque variation related to the irregularity of the heat engine from a measured angular position (Mes _ pos) of the shaft (17.3) or of the rotor (17.2);
a step (107,209) of subtracting/adding the torque variation from/to a reference torque set point (Cref) of the rotating electrical machine (17) to determine a control torque set point (Cref') according to the sign of the torque variation;
a step (108,210) of controlling the rotating electrical machine (17) to obtain a control torque setpoint.
2. The method of claim 1,
the step of determining the torque variations (101) comprises a step of selecting the torque variations (102), followed by a step of synchronous demodulation of the speed variations associated with the irregularities, so as to obtain the continuous component of the irregularities by filtering the high-frequency images.
3. The method of claim 2,
the step of determining the torque variation (101) further comprises the step of feedback controlling (103) the continuous component to a reference value, for example equal to zero.
4. The method of claim 3,
the method comprises a step (104) of correcting the component obtained after the feedback control.
5. The method according to claim 3 or 4,
the step of determining the torque variation (101) comprises the step of remodulating (105) the continuous component before performing the step of subtracting/adding the resulting signal from/to the reference torque set point.
6. The method of claim 5,
the method further comprises an optional step (106) of correcting the phase and/or gain of the signal obtained after remodulation.
7. The method of claim 1,
the step of determining (201) a torque variation associated with the irregularity comprises the steps of (202): the measured angular position of the rotor or shaft (17.2, 17.3) is transformed by a transformation system (45) operating at K times the rotational speed of the rotor or shaft in order to obtain two output signals (xD, xQ) in quadrature, wherein only the filtered continuous components of the two output signals are retained, wherein K is equal to the number of detonations in a cylinder per revolution of the crankshaft.
8. The method (1) according to any one of claims 1 to 7,
the reversible rotary electric machine (17) is disposed between a clutch (K1) and the heat engine (12).
9. The method (1) according to any one of claims 1 to 7,
the rotary electric machine (17) is arranged between two clutches (K0, K1) to allow an electric drive mode and a thermal drive mode of the motor vehicle.
10. A system for compensating irregularities of a heat engine (12) of a motor vehicle, said heat engine (12) belonging to a traction chain (10) comprising:
a mechanical damper (20);
a rotating electrical machine (17) comprising a rotor (17.2) fitted on a shaft (17.3) and comprising a stator (17.1);
at least one clutch (K0, K1); and
a gear box (13),
characterized in that the system comprises:
-a sensor (27) for measuring (100,200) the angular position of the shaft (17.3) or of the rotor (17.2), said sensor being implanted between the mechanical damper (20) and the gearbox (13), in a position where the rotor (17.2) of the rotary electric machine (17) is set;
determination means (29-33; 45-49) for determining a torque variation related to irregularities of the heat engine from a measured angular position (Mes _ pos) of the shaft (17.3) or of the rotor (17.2);
-subtracting or adding means (34) for subtracting/adding the torque variation from/to a reference torque set point (Cref) of the rotating electrical machine (17) depending on the sign of the torque variation to determine a control torque set point (Cref');
-control means (36, 37, 38, 39, 42) for controlling said rotating electrical machine (17) to obtain said control torque setpoint (Cref').
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1759495 | 2017-10-10 | ||
| FR1759495A FR3072145B1 (en) | 2017-10-10 | 2017-10-10 | PROCESS FOR COMPENSATION OF THE ACYCLISMS OF A THERMAL MOTOR BY MEANS OF A ROTATING ELECTRIC MACHINE |
| PCT/EP2018/077503 WO2019072863A1 (en) | 2017-10-10 | 2018-10-09 | Method for compensating for acyclic behaviour in a heat engine using a rotary electric machine |
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| Publication Number | Publication Date |
|---|---|
| CN111212990A true CN111212990A (en) | 2020-05-29 |
| CN111212990B CN111212990B (en) | 2022-07-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880066307.8A Active CN111212990B (en) | 2017-10-10 | 2018-10-09 | Method for compensating for non-periodic behaviour in a heat engine using a rotating electrical machine |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN111212990B (en) |
| DE (1) | DE112018004513T5 (en) |
| FR (1) | FR3072145B1 (en) |
| WO (1) | WO2019072863A1 (en) |
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| DE102015206737B4 (en) * | 2015-04-15 | 2017-03-16 | Schaeffler Technologies AG & Co. KG | vibration absorber |
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2017
- 2017-10-10 FR FR1759495A patent/FR3072145B1/en active Active
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- 2018-10-09 CN CN201880066307.8A patent/CN111212990B/en active Active
- 2018-10-09 WO PCT/EP2018/077503 patent/WO2019072863A1/en active Application Filing
- 2018-10-09 DE DE112018004513.7T patent/DE112018004513T5/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| CN111212990B (en) | 2022-07-12 |
| FR3072145B1 (en) | 2020-12-18 |
| WO2019072863A1 (en) | 2019-04-18 |
| DE112018004513T5 (en) | 2020-06-04 |
| FR3072145A1 (en) | 2019-04-12 |
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