CN110001619A - AC-tive fittings driving control system - Google Patents

AC-tive fittings driving control system Download PDF

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Publication number
CN110001619A
CN110001619A CN201811492552.3A CN201811492552A CN110001619A CN 110001619 A CN110001619 A CN 110001619A CN 201811492552 A CN201811492552 A CN 201811492552A CN 110001619 A CN110001619 A CN 110001619A
Authority
CN
China
Prior art keywords
accessory
torque
drive member
flexible drive
belt
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.)
Pending
Application number
CN201811492552.3A
Other languages
Chinese (zh)
Inventor
尼克·达什伍德·克里斯普
伊恩·罗宾逊
戴夫·珀金斯
瓦斯姆·库巴
尼科尔·巴雷特
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ford Global Technologies LLC
Original Assignee
Ford Global Technologies LLC
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 Ford Global Technologies LLC filed Critical Ford Global Technologies LLC
Publication of CN110001619A publication Critical patent/CN110001619A/en
Pending 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
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
    • F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
    • F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
    • 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
    • B60W10/00—Conjoint control of vehicle sub-units of different type or different function
    • B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
    • B60W10/101—Infinitely variable gearings
    • B60W10/107—Infinitely variable gearings with endless flexible members
    • 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
    • B60W10/30—Conjoint control of vehicle sub-units of different type or different function including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/003—Starting of engines by means of electric motors said electric motor being also used as a drive for auxiliaries, e.g. for driving transmission pumps or fuel pumps during engine stop
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H7/10—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley
    • F16H7/12—Means for varying tension of belts, ropes, or chains by adjusting the axis of a pulley of an idle pulley
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/04—Starting of engines by means of electric motors the motors being associated with current generators
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0865—Pulleys
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0863—Finally actuated members, e.g. constructional details thereof
    • F16H2007/0874—Two or more finally actuated members
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0893—Circular path
    • 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
    • F16H—GEARING
    • F16H7/00—Gearings for conveying rotary motion by endless flexible members
    • F16H7/08—Means for varying tension of belts, ropes, or chains
    • F16H2007/0889—Path of movement of the finally actuated member
    • F16H2007/0897—External to internal direction

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Automation & Control Theory (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A kind of operating method of the accessory drive system of motor vehicles, wherein the accessory drive system include: one or more accessory components；The motor generator of motor vehicles；It is configured as the flexible drive member of the transfer torque load between one or more accessory components and motor generator, wherein operating method includes: determining maximum allowable flexible drive member torque threshold；Detect the increase of the torque demand on flexible drive member；Determine when the torque demand on flexible drive member will be more than flexible drive member torque threshold；And the torque demand for one or more of reducing accessory components is not so that flexible drive member torque threshold is exceeded.

Description

AC-tive fittings driving control system
Technical field
The present invention relates to a kind of with the accessory drive system for improving performance, and specifically but not exclusively to one Kind is used for the accessory drive system of hybrid moto vehicle.
Background technique
Traditional hybrid vehicle uses the combination of internal combustion engine and electric motor.Electric motor can function as sending out Motor and regenerative braking is provided, so that the kinetic energy of vehicle restores with vehicle slow-down.Matched using light hybrid It sets, electric motor can be set in front end accessory drive (FEAD) and be connected to internal combustion engine by drive belt. This device is referred to as integrated starting generator (B-ISG) system of belt.In such a system, electric motor is mentioned by FEAD Energy recovery is assisted and regenerated for torque.For optimal hybrid power performance, B-ISG must be operated with maximum charge potential with Just restore or harvest kinetic energy as much as possible during recovery event.By providing torque auxiliary, B- to the crank axle of engine ISG can offset or supplement engine torque.
One critical limitation of FEAD system is the peak torque that can be transmitted by drive belt.Maximum drive belt is turned round Square is the torque that can be transmitted before drive belt undergoes parasitic loss (such as drive belt skidding) by drive belt Limitation, and torque transmitting reduces.It is this to limit the potential benefit for reducing hybrid power system, for example, by extensive in regeneration Optimum performance is prevented during multiple.This limitation can reduce the efficiency of belt driving part, and can reduce in conventional use The whole hybrid power performance of period.Therefore, the parasitic loss of FEAD is reduced to prevent drive belt from damaging, and extends driving skin The service life of band and to prevent the loss transmitted by the torque of drive belt be desired.
Referring to Fig.1, passive front end accessory drive system 100 includes generator pulley 102, driving belt pulley 104, attachment Component belt pulley 106 (such as compressor of air conditioner belt pulley), the first idler pulley 108, the second idler pulley 110, idle pulley Belt pulley connector 120 and drive belt 112, the drive belt 112 include that the first drive belt part 114, second drives skin Band part 116 and third drive belt part 118.The arrow of each belt pulley indicates the direction of rotation of each belt pulley in Fig. 1.
In passive front end accessory drive system 100, as shown in Figure 1, generator pulley 102,104 and of driving belt pulley Compressor of air conditioner belt pulley 106 is arranged to triangle, and wherein drive belt 112 is wrapped up around the excircle of each belt pulley, from And it connects belt pulley and drive belt 112 is divided into three parts.First drive belt part 114 connects driving belt pulley 104 With compressor of air conditioner belt pulley 106, the second drive belt part 116 connects compressor of air conditioner belt pulley 106 and dynamo belt Wheel 102, third drive belt part connect driving belt pulley 104 and generator pulley 102.
Idler pulley connector 120 is relative to driving belt pulley 104, generator pulley 102 and compressor of air conditioner skin Belt wheel 106 is generally centrally installed.First idler pulley 108 and the second idler pulley 110 are connected to idler pulley Connector 120, and pass through biasing element associated with idler pulley connector 120 (such as tension spring (not shown)) It is biased towards each other.
First idler pulley 108 is arranged between generator pulley 102 and compressor of air conditioner belt pulley 106, and It is biased by idler pulley biasing element towards the second idler pulley 110, to make 116 direction of the second drive belt part Second idler pulley deflects and tenses drive belt 112.Second idler pulley 110 is arranged in generator pulley Between 102 and driving belt pulley 104, and make third under the action of the biasing element of center idler belt pulley connector 120 Drive belt part 118 is deflected towards the first idler pulley.
First idler pulley 108 and the second idler pulley 110 are for increasing between drive belt 112 and belt pulley Friction, and thus minimize belt slippage.Idler pulley is by increasing the tension in drive belt and increasing driving skin It rubs with 112 relative to the cornerite of generator pulley 102, driving belt pulley 104 and compressor of air conditioner belt pulley 106 to increase It wipes.Drive belt tension passes through idler pulley for the second drive belt part 116 and third drive belt part 118 towards that This is pulled to increase.Since idler pulley drives the second drive belt part 116 and third under the action of biasing element Belt part 118 pulls toward each other, thus drive belt increase part and belt pulley circular contact and thus increase Cornerite.
When a belt pulley (such as driving belt pulley 104) is driven to rotation, rotation is generated on rotatable pulley Power.The power is transmitted to drive belt 112 as torque load, and drive belt 112 correspondingly passes between each belt pulley Torque delivery.Idler pulley provides a kind of passive device, the passive device be used for via by increased drive belt tension and The friction that increased belt pulley cornerite increases between drive belt 112 and belt pulley can be passed to increase by drive belt 112 The peak torque load passed.
Referring to Fig. 2, active front end accessory drive system 122 it is different from the passive front end accessory drive system 100 of Fig. 1 it It is in idler pulley connector 120 is connected to the first idler pulley connector 124 of the first idler pulley 128 It is replaced with the second idler pulley connector 126 for being connected to the second idler pulley 130.
The first actuator has can be set in first idler pulley connector 124, such as is operable as the first idle pulley skin Belt wheel 128 pivots electronic, the hydraulic or pneumatic drive unit that a variable enters in the path of the second drive belt part 116, And the second actuator has can be set in the second idler pulley connector 126, such as is operable as the second idler pulley 130 one variables of pivot enter electronic, the hydraulic or pneumatic drive unit in the path of third drive belt part 118.It is replacing In generation setting, the only one in the first and second idler pulleys can be mobile by actuator so that drive belt is tensioned.It is logical It crosses by idler pulley towards drive belt 112 or pivots a variable, active front end accessory drive system far from drive belt 112 The dress that the idler pulley connector of system 122 is provided for changing drive belt tension and the belt pulley cornerite of drive belt 112 It sets.Therefore, the offer of active front end accessory drive system 122 adapts to motor vehicle for adjusting the tension in drive belt 112 Instantaneous requirement and make belt slippage minimize device.
Referring to following table 1, passive front end accessory drive system 100 and active front end accessory drive system 122 are provided Typical torque limitation.Table 1, which shows typical passive front end accessory drive system 100, will be based on passive front end accessory drive system 100 limitation (such as drive belt skid or drive belt damage) and lose 2 to 6kW refresh charging chance.
Table 1
From table 1 it follows that active front end accessory drive system 122 has than passive front end accessory drive system 100 Higher torque limit.However, the introducing of active control increases the cost and control complexity of system.
Figure 132 of the best machine resident 134 during new European Driving Cycle (NEDC) is provided in Fig. 3.Figure 132 134, passive front end accessory drive system, which is resident, including best machine limits 136, potential refresh charging chance 138, motor torsional moment Limitation 140 and generator torque limitation 142.
Potential refresh charging chance 138 shows generator torque limitation 142 and is lower than passive front end accessory drive system Cross section between the best machine of limitation 136 resident 134.Therefore, potential refresh charging chance 138 indicate it is sizable again Raw charger can be lost in this passive front end accessory drive system 100.
Fig. 4 shows the front end accessory drive system 144 of torque load, and wherein drive belt 112 is from driving belt pulley 152 Drive accessory components belt pulley 148 and generator pulley 150.Resistance from driven pulley 148,150 causes instantaneous skin Belt deflector and stretching, as shown in the line 146 in Fig. 4.
The peak torque limitation of the front end accessory drive system 144 of torque load is driven belt slippage or drive belt The degree of stretching and operate one or more accessory components (such as compressor of air conditioner, power steering pump and water pump, it is all these May all be generally comprised on identical frontal attachments drive ring) needs limitation.Make in response to changing engine speed The needs of belt pulley (especially accessory components belt pulley 148 and generator pulley 150) acceleration or deceleration can be limited further Peak torque processed.Since hybrid power system needs to transmit Steady Torque between B-ISG and engine to carry out torque auxiliary Or regeneration restores, therefore these problems are amplified in the case where generator is substituted by motor generator in B-ISG.
In the front end accessory drive system 144 that the torque of Fig. 4 loads, around the drive belt packet of driving belt pulley 152 It wraps up in and is not enough to what offer overcame accessory components belt pulley 148 and generator pulley 150 when both operating with best endeavors Torque needed for resistance.
It is an object of the invention to modify the controllable element of passive front end accessory drive system 100 to make Hybrid power function maximizes.
Summary of the invention
According to the first aspect of the invention, a kind of attachment such as following operation motor vehicles described in claim 1 is provided The method of drive system.
Flexible drive member can be for example comprising chain, odontoid belt or vee-belt.It is soft in the setting being described below Property driving element include drive belt.
Predicting when may include close to the step of drive belt torque threshold using at least one in algorithm and look-up table It is a.
The increase of torque demand on belt can be caused by recovery event, and wherein motor generator operates as generator simultaneously And the kinetic energy of vehicle is converted into electric energy, and thus make vehicle deceleration.
This method, which can be further contained in the time cycle of recovery event, reduces one or more of accessory components Torque demand.
This method can further include recovery event once terminating to reconfigure front end accessory drive system.Therefore, i.e., Make during restoration, peak torque demand is also maintained at drive belt load threshold value hereinafter, still accessory components still can be It is operated in most-likely time with total efficiency.
If having the accessory components of the torque demand of reduction during recovery event is compressor of air conditioner, vehicle air conditioning Ability will be reduced temporarily, but due to recovery event typically last for the time it is short and restore event one terminate compressor full torsion Square will just restore, therefore the occupant of vehicle is less likely the significant changes of perception cabin temperature.
This method can be further included by reducing the torque at one or more accessory belt pulleys for torque load Decrease below drive belt torque threshold.For example, in the case that clutch is installed between accessory components and accessory belt pulley, It can be with cut-off clutch.Increase if the torque at one or more accessory belt pulleys reduces with the torque at generator pulley Proportional, then the peak torque load on belt will be kept constant.Therefore, under constant drive shaft torque, as motor is sent out Motor torque increase in demand can control accessory drive system torque demand and proportionally reduce.
The step of reducing the torque demand of one or more of accessory components, which may include, at least partly reduces attachment Load on component.For example, can reduce air-conditioning output, or can be complete in the case where accessory components are compressors of air conditioner Contract fully air-conditioning.
This method, which can be further included by increasing drive belt tension, increases drive belt torque threshold.Drive skin It can be adjusted relative to the position of engine by adjusting accessory belt pulley or accessory components (for example, attached by making with tension Part component or accessory belt pulley are pivoted far from engine thus tense drive belt).
This method can further include the cornerite by increasing one or more accessory belt pulleys and/or driving belt pulley To increase drive belt torque threshold.The cornerite of accessory belt pulley can be by adjusting the position of the idler pulley of engagement belt To increase.
This method, which can be further included, adjusts drive belt torque threshold according to the belt slippage of measurement.
This method, which can be further included, adjusts drive belt torque threshold according to the age of drive belt.
This method, which can be further included, adjusts drive belt torque threshold according to the state of drive belt.
The step of determining the state of drive belt may include the age of determining drive belt, and be based on its Age Estimation The state of driving belt pulley.With belt aging, maximum allowable drive belt torque threshold is usually lowered, but in certain feelings Under condition, maximum allowable drive belt torque threshold can increase with belt from its new state " entrance " and its frictional behaviour and It is incrementally increased in predetermined period, and deteriorates and be incrementally decreased with the age then as drive belt.In other application In, maximum allowable drive belt torque threshold can gradually or step by step reduce from the beginning or from the scheduled age, To reflect possible drive belt deterioration.
This method can further include following steps:
Measure one or more drive belt parameters；
The state of drive belt is determined based on the measured value of the belt parameter or each belt parameter；And
Drive belt torque threshold is adjusted according to the state of determining belt.Therefore, maximum allowable drive belt torque Threshold value can be reduced to level of security as drive belt deteriorates in service.
This method may include using at least one of algorithm and look-up table, and the look-up table is by the driving skin of given measurement It is associated with the respective conditions of drive belt or corresponding drive belt peak torque threshold value with parameter.
One or more drive belt parameters may include drive belt sliding, drive belt stretches, drive belt friction In characteristic, drive belt cracking, drive belt pilling, drive belt abrasion, drive belt abrasion and the separation of drive belt rib At least one.
Setting according to the present invention can be provided through the hybrid power function of passive front end accessory drive system 100 Improved availability without introducing loss associated with excessive belt tension, and does not need the drive of active front end attachment The complexity and cost of dynamic system 122.
According to the present invention, a kind of operating method of the accessory drive system of motor vehicles is provided, wherein the accessory drive system System includes:
One or more accessory components；
The motor generator of motor vehicles；
Flexible drive member, the flexible drive member be configured as one or more accessory components and motor generator it Between transfer torque load, wherein operating method include:
Determine maximum allowable flexible drive member torque threshold；
Detect the increase of the torque demand on flexible drive member；
Determine when the torque demand on flexible drive member will be more than flexible drive member torque threshold；And
The torque demand of one or more of accessory components is reduced so that flexible drive member torque threshold is not exceeded,
The step of when torque demand on flexible drive member will be more than flexible drive member torque threshold wherein determined Comprising the peak torque load on the flexible drive member calculated recently is compared simultaneously with the change rate of peak torque load And it predicts when close to flexible drive member torque threshold.
According to one embodiment of present invention, the increase of the torque demand on flexible drive member is caused by recovery event, And the torque demand of one or more of accessory components is reduced within the time cycle of the event of recovery.
According to one embodiment of present invention, wherein reconfiguring accessory drive at the end of the time cycle of the event of recovery System.
According to one embodiment of present invention, wherein reconfigure front end accessory drive system terminates comprising recovery event one With regard to restoring the torque demand of one or more accessory components.
According to one embodiment of present invention, wherein torsion during recovery event, at one or more accessory components The reduction of square is equal to the increase of the torque at motor generator.
According to one embodiment of present invention, wherein the step of reducing the torque demand of one or more of accessory components Comprising disconnecting the clutch between accessory components and the belt pulley of accessory components.
According to one embodiment of present invention, wherein the step of reducing the torque demand of one or more of accessory components Comprising at least partly reducing the load in accessory components.
According to one embodiment of present invention, this method further includes the tension by increasing flexible drive member to increase The step of adding flexible drive member torque threshold.
According to one embodiment of present invention, wherein the tension of flexible drive member by adjusting engagement flexible drive member The position of belt pulley increase.
According to one embodiment of present invention, this method is further included by increasing accessory components belt pulley, motor hair The cornerite of at least one of motor pulley and driving belt pulley is come the step of increasing flexible drive member torque threshold.
According to one embodiment of present invention, wherein cornerite by adjusting engagement flexible drive member belt pulley position To increase.
According to one embodiment of present invention, this method, which is further included, adjusts flexibility according to the age of flexible drive member The step of driving element torque threshold.
According to one embodiment of present invention, this method, which is further included, adjusts flexibility according to the state of flexible drive member The step of driving element torque threshold.
According to one embodiment of present invention, this method further includes following steps:
Measure one or more flexible drive member parameters；
Flexible drive member is determined based on the measured value of flexible drive member parameter or each flexible drive member parameter State；And
Flexible drive member torque threshold is adjusted according to the state of identified flexible drive member.
In order to avoid the repetition of the unnecessary duplication of labour and text in the description, only about of the invention one or more A aspect or arrangement describe certain features.It is to be understood, however, that technically in feasible situation, about the present invention Any aspect or arrangement description feature can also be used together with any other aspect or arrangement of the invention, as long as being produced Raw arrangement is in the range of following claims.
Detailed description of the invention
It for a better understanding of the present invention, now will be by showing and in order to more clearly illustrate how to realize the present invention The mode of example is referring to attached drawing, in which:
Fig. 1 is the schematic diagram of passive front end accessory drive system；
Fig. 2 is the schematic diagram of active front end accessory drive system；
Fig. 3 resident figure of best machine during being new European Driving Cycle (NEDC)；
Fig. 4 is the schematic diagram of the front end accessory drive system of torque load；
Fig. 5 is the schematic diagram of the front end accessory drive system of the torque load of the first arrangement according to the present invention；
Fig. 6 is the schematic diagram of the front end accessory drive system for reducing torque load of the first arrangement according to the present invention；
Fig. 7 is another schematic diagram of the front end accessory drive system of the torque load of the first arrangement according to the present invention；
Fig. 8 is another schematic diagram of the front end accessory drive system for reducing torque load of the first arrangement according to the present invention；
Fig. 9 is the schematic diagram of the front end accessory drive system of the torque load of the second arrangement according to the present invention；And
Figure 10 is the schematic diagram according to the front end accessory drive system for reducing torque load of the second of the disclosure the arrangement.
Specific embodiment
Referring to Fig. 5, front end accessory drive system 200 includes accessory belt pulley 202, driving belt pulley 204, dynamo belt Wheel 206, drive belt 208, a pair of of idler pulley 210 and the torque load 212 transmitted by drive belt 208.
Torque load 212 by accessory belt pulley 202, driving belt pulley 204 and generator pulley 206 by means of being applied to The rotary force of drive belt 208 is transmitted by drive belt 208.If the torque load 212 is allowed to be excessively increased, skin is driven Band 208 may skid, and may be stretched, wear or damage.
For example, torque load is applied to driving skin by each belt pulley in front end accessory drive system 200 by measuring With 208 torque and the torque of each measurement is added together to determine.Obtained calculating indicates to transmit by drive belt 208 Torque load.
The ability of torque, the torsion applied by accessory belt pulley 202 are transmitted to improve drive belt 208 between belt pulley Square is modified.The torsion of drive belt 208 is applied to from the accessory belt pulley 202 for being attached to such as compressor of air conditioner by managing The function of square, front end accessory drive system 200 is optimised.
Particularly, the modification of the torque applied by accessory belt pulley 202 by compressor of air conditioner includes to be reduced to torque Lower than maximum allowable drive belt torque threshold is made a reservation for, to adapt to battery charging or to restore event.For example, restoring or filling again Electric event is that motor generator generates electric power (such as vehicle head lamp or windshield scrape water with the electric component of supply of vehicles Device) time cycle, or during deceleration motor generator convert kinetic energy into electric energy so that vehicle deceleration time.Such as Fruit compressor of air conditioner recharge or recovery event during also apply high torque to belt, then torque load on belt may mistake Degree.
Since typical regeneration event can be very short, arrangement according to the invention is applied to driving by compressor of air conditioner The torque of belt 208 can reduce until recovery event terminates.Alternatively, the torque of application can be reduced in predetermined period Reduction, compressor of air conditioner is confirmed as being badly damaged very much later.Terminate in recovery event or after predetermined period, air-conditioning pressure Contracting machine returns to operation.
The predetermined drive belt torque threshold allowed is limited to parasitic loss and is introduced into before front end accessory drive system 200 The peak torque load that can be transmitted by drive belt.The predetermined drive belt torque threshold allowed can be by testing with warp It determines with testing or theoretically determining by calculating.
Fig. 6 shows the torque due to modification compressor of air conditioner and is carried by the reduced torque that drive belt 208 transmits Lotus 214.
Technology for reducing the torque for being applied to drive belt 208 by compressor of air conditioner includes external variable using having The compressor of discharge capacity uses the compressor with external variable suction pressure set point.
Referring to Fig. 7, front end accessory drive system 216 includes accessory belt pulley 220, driving belt pulley 222, dynamo belt Take turns 224, drive belt 226, a pair of of idler pulley 228 and the torque load 218 transmitted by drive belt 226.
Fig. 7 and Fig. 8 shows the case where engine quickly accelerates (for example, in hard first gear acceleration period or closing At the end of closing pedal downshift, for better engine braking).In this case, the summation transmitted by drive belt 226 Power by the needs of acceleration generator belt pulley 224 and the rotatory inertia of accessory belt pulley 220 or each accessory belt pulley 220 come Increase.
In the front end accessory drive system 216 of Fig. 7, the torque load 218 transmitted by drive belt 226 be managed with Adapt to the quick variation of engine speed.That is, torque load and/or the horse of the accessory belt pulley 220 of compressor of air conditioner Torque load up to the generator pulley 224 of generator is only restricted when system is by strong engine speed transition.It is logical It crosses to manage between engine acceleration and drive belt 226 is applied to by accessory belt pulley 220 and/or generator pulley 224 Torque is cancelled, this causes to subtract when drive belt 226 is forced to change speed by the inertia torque that drive belt 226 transmits The risk of few belt slippage.Regenerative torque possibility is reduced or increased during engine speed variation in this arrangement, simultaneously Ensure to make the torque maximization that can be used for operating front end accessory drive system 216 during engine speed changes.
In the front end accessory drive system 216 of Fig. 8, by opening clutch (such as electromagnetic air conditioner compressor clutch) Mitigate the inertia and static torque of accessory belt pulley 220, so that compressor of air conditioner and accessory belt pulley 220 be disconnected.Due to Compressor of air conditioner and front end accessory drive system 216 disconnect, and reduced torque load 230 is transmitted by drive belt 226, thus Reduce the parasitic loss of front end accessory drive system 216.
Inertia torque is further managed by active control motor generator and compressor of air conditioner.By actively controlling It is applied to the torque of drive belt 226, can temporarily reduce the regeneration towing of generator pulley 224 during regeneration event Torque, and temporarily reduce the inertia torque applied by accessory belt pulley 220 during the use of compressor of air conditioner, thus really It protects and is maintained in the limit of maximum allowable drive belt torque threshold by the torque load 218 that drive belt 226 transmits.
The technology of control motor generator and compressor of air conditioner is related to being applied to drive belt by belt pulley real-time measurement 226 torque, and the torque demand of motor generator and/or compressor of air conditioner is increased or decreased to ensure to pass through drive belt The total torque of 226 transmitting is no more than maximum allowable drive belt torque threshold.
Another 226 torque management technology of drive belt relates to the use of the energy supplied from motor generator to compensate by example As compressor of air conditioner is applied to the inertia torque of drive belt 226.This technology from motor generator forward end attachment by driving Dynamic system 216 increases energy to provide the device for drawing required torque from drive belt 226 for compressor of air conditioner.In the technology In, the inertia torque for being applied to front end accessory drive system 216 is compensated by generator pulley 224 by motor generator, is made Drive belt 226 is obtained to leave only to cope with the static torque load applied by accessory belt pulley 220 by compressor of air conditioner.
Fig. 9 and 10, which is shown, is passed through generator by the inertia torque that accessory belt pulley 220 is applied to drive belt 226 Belt pulley 224 is added to the case where energy offset of front end accessory drive system 216.Specifically, the torque load compared to Fig. 9 232, Figure 10 torque load 234 reduces significantly.
It is attached that another technology of the service life of the drive belt 226 of extension front end accessory drive system 216 is included in front end The state of drive belt 226 and the correspondingly maximum allowable driving skin of active management are monitored during the service life of part drive system 216 Band torque threshold.In this technique, maximum allowable drive belt torque threshold will be in the longevity of front end accessory drive system 216 Reduce during life, to reflect the expected deterioration of belt.Drive belt is deteriorated and is determined based on drive belt performance characteristic, the performance Feature includes such as drive belt skidding, drive belt stretching, frictional behavior, drive belt cracking, drive belt pilling, driving Belt abrasion, drive belt age and the separation of drive belt rib.
By measuring one or more drive belts during the service life of front end accessory drive system 216 with preset frequency Can each of feature determine maximum allowable drive belt torque threshold.The drive belt performance characteristics of measurement are used subsequently to Calculate drive belt state value.By drive belt state value and drive belt state value to the database of drive belt adjusted value into Row compares, and selects adjust the amount of maximum allowable drive belt torque threshold as the drive belt shape closest to calculating The drive belt adjusted value of state value.
The technology for initiatively managing maximum allowable drive belt torque threshold can be applied with discussed above about management Any technology for being added to the torque load of drive belt 226 is used in combination.By combining these technologies, required action level (for example, additional compressive machine is disconnected by release clutch) by during the service life of vehicle as drive belt 226 leads to It crosses normal aging deterioration and increases.
In all technologies being discussed above, the control of accessory components torque (i.e. compressor of air conditioner) or motor generator torque System can pass through electronic control module (such as Powertrain control module (PCM)) Lai Shixian in motor vehicles.PCM estimation The torque being applied at each belt pulley on drive belt, and calculate maximum allowable drive belt torque load.Before being connected to The torque demand of the component of accessory drive system is held correspondingly to adjust, to avoid at any belt pulley on drive belt Drive belt skids.In a particular embodiment, only one or the slave unit of multiple selections will be by torque limits.For example, In typical front end accessory drive system, driving belt pulley can be preferential always, so as to allow always total at driving belt pulley Required torque, while the limitation of calculating is applied to other component.
The criticality or hybrid power of the operation of predetermined limit belt pulley and corresponding component based on such as remaining part are grasped Make, generated using motor generator, compressor of air conditioner operates the balance between power-assisted steering operation to determine.In addition, When the torque that limitation is applied by the other component that can control, it is contemplated that from being unable to control or run vehicle safety to pass The accessory belt pulley of important component (for example, hydraulic power steering device or water pump) is applied to the torque of front end accessory drive system Load.
Although above embodiment is described about passive front end accessory drive system, the present invention can also be applied In active front end accessory drive system, to extend needed for the opereating specification of passive state, or reduction in ambulatory situations Maximum drive belt tension.
It will be apparent to a skilled person that although by way of example referring to one or more exemplary Example describes the present invention, but the present invention is not limited to disclosed examples, and are defined by the following claims not departing from The scope of the present invention in the case where, alternative exemplary can be constructed.

Claims (15)

1. a kind of operating method of the accessory drive system of motor vehicles, wherein the accessory drive system includes:
One or more accessory components；
The motor generator of the motor vehicles；
Flexible drive member, the flexible drive member are configured as sending out in one or more of accessory components and the motor Transfer torque load between motor, wherein the operating method includes:
Determine maximum allowable flexible drive member torque threshold；
Detect the increase of the torque demand on the flexible drive member；
Determine when the torque demand on the flexible drive member will be more than the flexible drive member torque threshold；And And
The torque demand of one or more of described accessory components is reduced so that the flexible drive member torque threshold It is not exceeded.
2. the operating method of the accessory drive system of motor vehicles according to claim 1, wherein determining the flexible drive The step of when torque demand on dynamic element will be more than the flexible drive member torque threshold comprising that will calculate recently The flexible drive member on peak torque load be compared and predict when with the change rate of peak torque load Close to the flexible drive member torque threshold.
3. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, wherein described The increase of the torque demand on flexible drive member is caused by recovery event, and one in the accessory components or more A torque demand is reduced within the time cycle of the recovery event.
4. the operating method of the accessory drive system of motor vehicles according to claim 3, wherein in the recovery event The time cycle at the end of reconfigure the accessory drive system.
5. the operating method of the accessory drive system of motor vehicles according to claim 4, wherein reconfigure it is described before End accessory drive system includes that the recovery event is needed once the torque for terminating to restore one or more of accessory components It asks.
6. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, wherein in institute During stating recovery event, the reduction of the torque at one or more of accessory components is equal at the motor generator The increase of torque.
7. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, wherein reducing The step of torque demand of one or more of the accessory components includes to disconnect the accessory components and the attachment Clutch between the belt pulley of component.
8. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, wherein reducing The step of torque demand of one or more of the accessory components includes at least partly to reduce the accessory components On load.
9. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims is further wrapped Containing the tension by increasing the flexible drive member come the step of increasing the flexible drive member torque threshold.
10. the operating method of the accessory drive system of motor vehicles according to claim 9, wherein the flexible drive is first The tension of part increases by adjusting the position of the belt pulley for engaging the flexible drive member.
11. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, further Comprising being increased by the cornerite for increasing at least one of accessory components belt pulley, motor generator belt pulley and driving belt pulley The step of adding the flexible drive member torque threshold.
12. the operating method of the accessory drive system of motor vehicles according to claim 11, wherein the cornerite passes through Adjustment engages the position of the belt pulley of the flexible drive member to increase.
13. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, further It include the step of adjusting the flexible drive member torque threshold according to the age of the flexible drive member.
14. the operating method of the accessory drive system of motor vehicles according to any one of the preceding claims, further It include the step of adjusting the flexible drive member torque threshold according to the state of the flexible drive member.
15. the operating method of the accessory drive system of motor vehicles according to claim 14 further includes following step It is rapid:
Measure one or more flexible drive member parameters；
The flexible drive is determined based on the measured value of the flexible drive member parameter or each flexible drive member parameter The state of element；And
The flexible drive member torque threshold is adjusted according to the state of the identified flexible drive member.
CN201811492552.3A 2017-12-15 2018-12-07 AC-tive fittings driving control system Pending CN110001619A (en)

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GB1721050.1A GB2569373B (en) 2017-12-15 2017-12-15 Active accessory drive control system
GB1721050.1 2017-12-15

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DE (1) DE102018131908A1 (en)
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10112568A1 (en) * 2001-03-15 2002-10-02 Bosch Gmbh Robert Process for detecting slip in generator and start generator systems
US6834228B2 (en) * 2001-10-25 2004-12-21 The Gates Corporation Belt drive system with automatic belt tension control
DE112012006222T5 (en) * 2012-04-11 2015-01-15 Mitsubishi Electric Corporation Vehicle power generation control device and control method therefor

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GB201721050D0 (en) 2018-01-31
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GB2569373B (en) 2020-02-19

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