CN1926005A - Electric vehicle and its control method - Google Patents
Electric vehicle and its control method Download PDFInfo
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- CN1926005A CN1926005A CNA2005800066188A CN200580006618A CN1926005A CN 1926005 A CN1926005 A CN 1926005A CN A2005800066188 A CNA2005800066188 A CN A2005800066188A CN 200580006618 A CN200580006618 A CN 200580006618A CN 1926005 A CN1926005 A CN 1926005A
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Abstract
In response to a decrease in observed battery voltage Vb to or below a preset threshold value Vs1, the control procedure of the invention closes the gates of an inverter for an air conditioner to stop a supply of electric power to the air conditioner (at a time point t1). In response to a further decrease in observed battery voltage Vb to or below a preset threshold value Vm1, the control procedure closes the gates of inverters for motors MG1 and MG2 to stop supplies of electric power to the motors MG1 and MG2 (at a time point t2). The threshold values Vs1 and Vm1 are set to keep the battery voltage Vb at or above a minimum required voltage for proper operations of an electric power steering (EPS). This arrangement guarantees the minimum required voltage for proper operations of the EPS and accordingly ensures the stable steering performance even in the event of a voltage decrease of the battery.
Description
Technical field
The present invention relates to the control method of elec. vehicle and elec. vehicle.More particularly, the present invention relates to elec. vehicle by the outputting power driving of electrical motor, and the control method of described elec. vehicle.
Background technology
A kind of electric vehicles that has proposed is by the driving motor that the electric power drove (motor of storage battery supply, motor) outputting power and travelling, and has the power steering gear that activates by the outputting power of power steering electrical motor (for example, see Japanese Utility Model do not authorize publication communique No.64-1171).This elec. vehicle that has proposed stops the electric power supply to driving motor under the situation that the abnormal voltage of storage battery reduces, simultaneously through with corresponding predetermined amount of time of coast time after stop electric power supply to the power steering electrical motor.This prevents the overdischarge of storage battery and the invalid power steering during coast is travelled.
The prior art elec. vehicle stops electric power supply to the power steering electrical motor later on through predetermined amount of time after stopping the electric power supply of driving motor certainly.Yet, when still continuing to travel, thisly stop to control the unexpected increase that may cause invalid power steering unfriendly and cause required steering effort through elec. vehicle after the predetermined amount of time.Under the situation that battery tension reduces, for example, because the acceleration of elec. vehicle, it is inconsistent so cause bad driving to be felt with the output of required propulsive effort to stop electric power supply to driving motor.
Summary of the invention
Therefore the purpose of the control method of elec. vehicle of the present invention and described elec. vehicle is, even also guarantee stable turning efficiency under the situation that battery tension reduces.The purpose of the control method of elec. vehicle of the present invention and described elec. vehicle also is, even also keep good driving sensation under the situation that battery tension reduces.The purpose of the control method of elec. vehicle of the present invention and described elec. vehicle also is, prevents the overdischarge of storage battery.
The elec. vehicle by having the following stated structure and layout and the control method of described elec. vehicle can realize to the above and other relevant purpose of small part.
The present invention relates to the elec. vehicle that driven by the outputting power of electrical motor, described elec. vehicle comprises: to described electrical motor transferring electric power and from the electricity accumulating unit of described electrical motor transferring electric power; By the subsidiary engine that activates from the electric power supply of described electricity accumulating unit; Drive and export the supplementary structure that turns to of steering torque to steering hardware by electric power supply from described electricity accumulating unit; Measure the voltage measurement module of the voltage of described electricity accumulating unit; And control module, when the voltage of being measured by described voltage measurement module was reduced to or is lower than first predetermined value, described control module stopped from described electricity accumulating unit to described subsidiary engine and to the electric power supply of described electrical motor.
When the voltage of measured electricity accumulating unit was reduced to or be lower than first predetermined value, elec. vehicle of the present invention stopped to subsidiary engine and to the electric power supply of electrical motor.This layout is even under the situation that electricity accumulating unit voltage reduces, guaranteed the supply to the required electric power that turns to supplementary structure, and guaranteed stable turning efficiency.A typical case of " subsidiary engine " is an A/C.
In elec. vehicle of the present invention, preferably, described first predetermined value is greater than the described required minimum driving voltage of proper handling that turns to supplementary structure.When the voltage of measured electricity accumulating unit is reduced to or be lower than first predetermined value, stop to subsidiary engine and to the electric power supply of electrical motor, described first predetermined value is higher than the required minimum driving voltage of proper handling that turns to supplementary structure.This layout has guaranteed to turn to the required minimum driving voltage of proper handling of supplementary structure effectively.
In a preferred embodiment of elec. vehicle of the present invention, when measured voltage was reduced to or be lower than described first predetermined value, described control module stopped the electric power supply to described subsidiary engine before the electric power supply that stops described electrical motor.Before the electric power supply that stops electrical motor, stop electric power supply, guaranteed supply, thereby kept good driving sensation the electrical motor required electric power to subsidiary engine.In the present embodiment, control module can stop the electric power supply to described subsidiary engine when measured voltage is reduced to or be lower than described first predetermined value, and stops the electric power supply to described electrical motor when measured voltage is further reduced to or be lower than than little second predetermined value of described first predetermined value.
In another preferred embodiment of elec. vehicle of the present invention, when measured voltage was reduced to than little the 3rd predetermined value of described first predetermined value, described control module stopped from described electricity accumulating unit to the described electric power supply that turns to supplementary structure.When reducing to the 3rd predetermined value, the voltage of measured electricity accumulating unit stops turning to the electric power supply of supplementary structure.This layout has prevented the overdischarge of electricity accumulating unit effectively.In the present embodiment, when measured voltage was reduced to the 3rd predetermined value, before stopping the electric power supply that turns to supplementary structure, control module can reduce gradually from turning to supplementary structure to output to the steering torque of steering hardware.This layout has advantageously prevented the turning to of momentary heavy that stops when turning to the electric power supply of supplementary structure.Before stopping the electric power supply that turns to supplementary structure, control module is preferably in the reduction gradually of carrying out steering torque in the predetermined amount of time.
In a further advantageous embodiment, elec. vehicle of the present invention comprises: combustion engine; And electro-mechanical power input/output structure, described electro-mechanical power input/output structure is connected in the output shaft of described combustion engine and is connected in the axle drive shaft that links to each other with the vehicle bridge (axle) of described elec. vehicle, and by electric power and mechanokinetic input and output at least a portion of the outputting power of described combustion engine is outputed to described axle drive shaft; Wherein, described electrical motor is connected with described axle drive shaft with from described axle drive shaft imput power and output power to described axle drive shaft.In the present embodiment, electro-mechanical power input/output structure can comprise: triple axle power input/output mechanism, these three axles of described triple axle power input/output mechanism and the output shaft of described combustion engine, described axle drive shaft and the 3rd turning cylinder link to each other, and import and output to the automatically definite power of importing and outputing to this remaining axle from a remaining axle of power of these any two axles based on any two axles from these three axles; And from described the 3rd turning cylinder imput power and the electrical generator that outputs power to described the 3rd turning cylinder; And described control module is accompanied by the electric power supply that the stopping of electric power supply of described electrical motor is stopped to described electrical generator.
The present invention relates to the control method of the elec. vehicle that driven by the outputting power of electrical motor, described elec. vehicle comprises: electrical motor; To described electrical motor transferring electric power and from the electricity accumulating unit of described electrical motor transferring electric power; By the subsidiary engine that activates from the electric power supply of described electricity accumulating unit; And the supplementary structure that turns to that drives and export steering torque by electric power supply to steering hardware from described electricity accumulating unit; Described control method may further comprise the steps: the voltage of (a) measuring described electricity accumulating unit; And (b) when the voltage of described electricity accumulating unit measured in the described step (a) is reduced to or is lower than first predetermined value, stop from described electricity accumulating unit to described subsidiary engine and to the electric power supply of described electrical motor.
When the voltage of measured electricity accumulating unit was reduced to or be lower than first predetermined value, the control method of elec. vehicle of the present invention stopped to subsidiary engine and to the electric power supply of electrical motor.Even this layout has been guaranteed the supply to the required electric power that turns to supplementary structure under the situation that electricity accumulating unit voltage reduces, and has guaranteed the stable turning efficiency that turns to.A typical case of " subsidiary engine " is an A/C.
In a preferred embodiment of the control method of elec. vehicle of the present invention, when measured voltage was reduced to or be lower than described first predetermined value, described step (b) stopped the electric power supply to described subsidiary engine before the electric power supply that stops described electrical motor.Before the electric power supply that stops electrical motor, stop electric power supply, guaranteed supply, thereby kept good driving sensation the electrical motor required electric power to subsidiary engine.In the present embodiment, step (b) can stop the electric power supply to described subsidiary engine when measured voltage is reduced to or be lower than described first predetermined value, and stops the electric power supply to described electrical motor when measured voltage is further reduced to or be lower than than little second predetermined value of described first predetermined value.
In a further advantageous embodiment, the control method of elec. vehicle may further comprise the steps: when measured voltage is reduced to than little the 3rd predetermined value of described first predetermined value, before stopping, reducing the steering torque that turns to supplementary structure to output to described steering hardware from described gradually to the described electric power supply that turns to supplementary structure.This layout has advantageously prevented the turning to of momentary heavy that stops when turning to the electric power supply of supplementary structure.
Description of drawings
Fig. 1 schematically shows the structure as the motor vehicle driven by mixed power of the elec. vehicle in the one embodiment of the invention;
Fig. 2 shows the diagram of circuit of the electric power supply control routine of the mixed electronic control unit execution in the motor vehicle driven by mixed power that is included in present embodiment;
Be used for the inverter (inverter) of A/C during the reduction of the voltage between terminals Vb that Fig. 3 shows at storage battery and be used for the time series door operation of the inverter of motor M G1, MG2;
Fig. 4 shows the diagram of circuit of the electric power supply control routine of correction;
Fig. 5 shows the diagram of circuit of electric powered steering (EPS) control routine of EPS electronic control unit execution;
Fig. 6 schematically shows a structure of revising another motor vehicle driven by mixed power in the example; And
Fig. 7 schematically shows another structure of revising another motor vehicle driven by mixed power in the example.
The specific embodiment
To the pattern of the present invention of carrying out be described as a preferred embodiment below.Fig. 1 schematically shows the structure as the motor vehicle driven by mixed power 20 of the elec. vehicle in the one embodiment of the invention.As shown in FIG., the motor vehicle driven by mixed power 20 of present embodiment comprises that driving engine 22, the comprehensive (System of triple axle power distribution that is connected with bent axle 26 as the output shaft of driving engine 22 by vibration damping 28 close) mechanism 30, be connected with power distribution integration mechanism 30 and the motor M G1 that can generate electricity, the retarder 35 that is installed on the gear ring axle 32a that is used as the axle drive shaft that is connected with power distribution integration mechanism 30, another motor M G2 that is connected with retarder 35, and the mixed electronic control unit 70 of controlling whole motive power outputting apparatus.
Power distribution integration mechanism 30 has: sun gear 31 promptly, external gear; Gear ring 32 promptly, inner gear is positioned to concentric with sun gear 31; With sun gear 31 and a plurality of miniature gearss 33 of being meshed with gear ring 32; And with a plurality of miniature gearss 33 remain on allow its freely revolve round the sun with and pinion carrier 34 under a kind of like this mode of freely rotating on the corresponding axis.That is to say that power distribution integration mechanism 30 is constituted as the sun and planet gear of the differential motion of sun gear 31, gear ring 32 and the pinion carrier 34 that can be provided as rotating element.Pinion carrier 34 in the power distribution integration mechanism 30, sun gear 31 and gear ring 32 are respectively with the bent axle 26 of driving engine 22, be connected with retarder 35 with motor M G1 and by gear ring axle 32a.When motor M G1 was used as electrical generator, the power of exporting from driving engine 22 and importing by pinion carrier 34 was assigned in sun gear 31 and the gear ring 32 according to transmitting ratio.On the other hand, when motor M G1 when the electrical motor, from driving engine 22 output and by the power of pinion carrier 34 inputs and output from motor M G1 and by the power of sun gear 31 inputs combined and power that synthesized is output to gear ring 32.Therefore the power that outputs to gear ring 32 finally is transferred to drive wheel 63a, 63b by gear mechanism 60 and differentiator 62 from gear ring axle 32a.
Motor M G1, MG2 both are as electrical generator and as the driven known motor-alternator of electrical motor.Motor M G1, MG2 via inverter 41,42 to storage battery 50 and from storage battery 50 transferring electric power.The electric wireline 54 that inverter 41,42 is connected with storage battery 50 is constituted as by inverter 41,42 shared anode bus and cathode bus.This layout makes can be by another electrical consumption by the electric power of a generation among motor M G1, the MG2.Superfluous power charge that storage battery 50 is produced by motor M G1 or MG2 and discharge are to replenish the deficiency of electric power.When having reached power balance between motor M G1, MG2, storage battery 50 is no longer charge or discharge just.Both operations of motor M G1, MG2 are all by motor electronic control unit (being referred to as motor ECU hereinafter) 40 controls.Motor ECU40 receives the needed various signals of operation of control motor M G1, MG2, for example, from the signal of the turned position detecting sensor 43,44 of the turned position that is used to detect motor M G1, MG2 rotor and the phase current that is applied to motor M G1, MG2 and measures by the current sensor (not shown).Motor ECU40 is to inverter 41,42 output switch (switching) control signals.Motor ECU40 communicates by letter with mixed electronic control unit 70 so that in response to the operation from mixed electronic control unit 70 control signals transmitted control motor M G1, MG2, simultaneously as requested to the data of mixed electronic control unit 70 outputs relevant for the running state of motor M G1, MG2.
Electric wireline 54 is connected with A/C 46 by inverter 45 and is connected with electrically powered steering apparatus using same (being referred to as EPS hereinafter) 48 by inverter 47.EPS48 exports auxiliary torque by the synergism of built-in motor 48a and retarder (not shown) to the steering hardware (not shown).Be used to activate the compressor (not shown) of A/C 46 and the motor 48a of EPS48 from the electric power of storage battery 50 supplies.EPS electronic control unit (the being referred to as EPS-ECU hereinafter) 48b that is built among the EPS48 controls motor 48a so that output and the corresponding auxiliary torque of deflection angle.
Mixed electronic control unit 70 is constituted as the microprocessor of RAM76, unshowned input-output port and the unshowned communication port of the ROM74 that comprises CPU72, stores handler, interim storage data.Mixed electronic control unit 70 receives various inputs by input port: from the ignition signal of ignition lock 80, shift position SP from the shift position sensor 82 of the current location that is used to detect shifter bar 81, accelerator opening Acc from the accelerator pedal position sensor 84 of the tread-on quantity that is used to measure accelerator pedal 83, brake pedal position BP from the brake pedal position sensor 86 of the tread-on quantity that is used to measure brake pedal 85, and from the vehicle velocity V of car speed sensor 88.Mixed electronic control unit 70 is communicated by letter with Engine ECU 24, motor ECU40 and storage battery ECU52 by communication port, so that transmit various control signals and data to Engine ECU 24, motor ECU40 and storage battery ECU52 and from Engine ECU 24, motor ECU40 and storage battery ECU52, as previously described.
So the motor vehicle driven by mixed power 20 of the present embodiment of structure based on chaufeur to corresponding accelerator opening Acc of the depression amount of accelerator pedal 83 and vehicle velocity V, calculating should be to the moment of torsion that requires as the gear ring axle 32a output of axle drive shaft.Driving engine 22 and motor M G1 and motor M G2 are moved control, exporting to gear ring axle 32a with the corresponding demanded driving force of wanting of moment of torsion that requires of this calculating.The operation of driving engine 22 and motor M G1, MG2 control optionally is a kind of in torque conversion drive mode, charging-discharge drive pattern and the motor drive mode.The operation of torque conversion drive mode control driving engine 22 is with output and the power of wanting the demanded driving force equal quantities, drives simultaneously and controls motor M G1, MG2 so that all takeoff outputs from driving engine 22 experience torque conversion and are output to gear ring axle 32a by means of power distribution integration mechanism 30 and motor M G1, MG2.The operation of charging-discharge drive pattern control driving engine 22 with output with want demanded driving force and be storage battery 50 charge consumed or by the discharge power of summation equal quantities of the electric power amount of being supplied of storage battery 50, while is along with the charge or discharge of storage battery 50, drive and control motor M G1, MG2, so that experience torque conversion and be output to gear ring axle 32a by means of power distribution integration mechanism 30 and motor M G1, MG2 with the takeoff output of all or part of wanting demanded driving force to equate from driving engine 22.The operation of motor drive mode shutting engine down 22, and drive controlling motor M G2 with will with the takeoff output of wanting the demanded driving force equal quantities to gear ring axle 32a.
Following description is the operation about the motor vehicle driven by mixed power 20 of the embodiment with said structure, is specially the corresponding a series of controls of reduction with the voltage between terminals Vb of storage battery 50.Fig. 2 shows the diagram of circuit of the electric power supply control routine of mixed electronic control unit 70 execution in the motor vehicle driven by mixed power 20 that is included in present embodiment.This routine (for example, under per 8 milliseconds time gap) under the preset time interval is repeatedly carried out.
In the electric power supply control routine, the CPU72 of mixed electronic control unit 70 at first imports the voltage between terminals Vb (step S100) of storage battery 50.The voltage between terminals Vb of storage battery 50 is measured by voltage sensor 51a and receives from storage battery ECU52 by communication.In the following description, the voltage between terminals Vb of storage battery 50 can be known as battery tension Vb.
The battery tension Vb compare with predetermined threshold Vs1, Vs2 (step S110) of input.When battery tension Vb was not higher than predetermined threshold Vs1, CPU72 turn-offed the gate pole (gate) (step S120) of the inverter 45 that is used for A/C 46.When battery tension Vb was not less than predetermined threshold Vs2, CPU72 conducting again was used for the gate pole (step S130) of the inverter 45 of A/C 46.Predetermined threshold Vs1, Vs2 are set to such an extent that have certain hysteresis, with the shutoff of the gate pole that prevents inverter 45 and the frequent transitions between the conducting again.Threshold value Vs1, Vs2 are higher than the minimum required voltage of the proper handling of EPS48.
Afterwards, the battery tension Vb of input compare with predetermined threshold Vm1, Vm2 (step S140).When battery tension Vb was not higher than predetermined threshold Vm1, CPU72 turn-offed the gate pole (step S150) of the inverter 41,42 that is used for motor M G1, MG2.When battery tension Vb was not less than predetermined threshold Vm2, CPU72 conducting again was used for the gate pole (step S160) of the inverter 41,42 of motor M G1, MG2.After the processing of step S150 or S160, CPU72 withdraws from from this electric power supply control routine.The same with threshold value Vs1, Vs2, predetermined threshold Vm1, Vm2 are set to such an extent that have certain hysteresis, with the shutoff of the gate pole that prevents inverter 41,42 and the frequent transitions between the conducting again.Threshold value Vm1, Vm2 are lower than the minimum required voltage that predetermined threshold Vs1, Vs2 still are higher than the proper handling of EPS48.
Fig. 3 shows inverter 45 that is used for A/C 46 when the reduction of the voltage between terminals Vb of storage battery 50 and the time series door operation that is used for the inverter 41,42 of motor M G1, MG2.When the voltage between terminals Vb of measured storage battery 50 reduced to or be lower than predetermined threshold Vs1, the gate pole that is used for the inverter 45 of A/C 46 was turned off to stop the electric power supply (at moment t1) for A/C 46.When battery tension Vb further reduced to or be lower than predetermined threshold Vm1, the gate pole that is used for the inverter 41,42 of motor M G1, MG2 was turned off to stop the electric power supply (at moment t2) for motor M G1, MG2.The shutoff of gate pole has reduced the power consumption of A/C 46 and motor M G1, MG2 and has finally caused the rising of the voltage between terminals Vb of storage battery 50.When the battery tension Vb that increases meets or exceeds predetermined threshold Vm2, the gate pole of inverter 41,42 that is used for motor M G1, MG2 by conducting again to recover electric power supply (at moment t3) for motor M G1, MG2.When battery tension Vb further increases to or surpass predetermined threshold Vs2, the gate pole of inverter 45 that is used for A/C 46 by conducting again to recover electric power supply (at moment t4) for A/C 46.By this way, in response to the reduction of the voltage between terminals Vb of storage battery 50 and stop for A/C 46 and for the electric power supply of motor M G1, MG2, to guarantee supply for the required electric power of EPS48.Threshold value Vs1, Vm1 are as stopping for A/C 46 and for the benchmark of the electric power supply of motor M G1, MG2.These threshold values Vs1, Vm1 be by settings such as test methods, keeps to such an extent that be equal to or greater than the minimum required voltage of the proper handling that is used for EPS48 with the voltage between terminals Vb with storage battery 50.
Aforesaid, when the voltage between terminals Vb of measured storage battery 50 reduced to or be lower than predetermined threshold Vs1, the motor vehicle driven by mixed power 20 of present embodiment turn-offed the gate pole of inverter 45 to stop the electric power supply for A/C 46.When the voltage between terminals Vb of storage battery 50 further reduced to or is lower than predetermined threshold Vm1, the motor vehicle driven by mixed power 20 of present embodiment turn-offed the gate pole of inverter 41,42 to stop the electric power supply for motor M G1, MG2.Threshold value Vs1, Vm1 remain the minimum required voltage that is equal to or greater than the proper handling that is used for EPS48 by settings such as test methods with the voltage between terminals Vb with storage battery 50.This layout has been guaranteed the minimum required voltage of EPS48 proper handling, even therefore also guaranteed stable turning efficiency under the situation that storage battery 50 voltages reduce.After stopping, the electric power supply for A/C 46 stops electric power supply for motor M G1, MG2.This layout gives the preceence that motor M G1, MG2 are better than A/C 46, has therefore kept good driving sensation.
Motor M G1, the motor M G2, storage battery 50, A/C 46, EPS48 and the voltage sensor 51a that are included in the motor vehicle driven by mixed power 20 of present embodiment correspond respectively to electrical generator of the present invention, electrical motor, electricity accumulating unit, subsidiary engine, turn to supplementary structure and voltage measurement module.The mixed electronic control unit 70 of the electric power supply control routine of execution present embodiment is corresponding to control module of the present invention.Predetermined threshold Vs1, the Vm1 of present embodiment is equivalent to first predetermined value of the present invention and second predetermined value respectively.
In the motor vehicle driven by mixed power 20 of present embodiment, set by test method etc. for A/C 46 and for threshold value Vs1, the Vm1 of the benchmark of the electric power supply of motor M G1, MG2 as being used to stop, remaining on the minimum required voltage that is equal to or greater than the proper handling that is used for EPS48 with voltage between terminals Vb storage battery 50.The voltage between terminals Vb of storage battery 50 can strictly not remain on the minimum required voltage that is used for the EPS48 proper handling but can be a little less than minimum required voltage.
In the motor vehicle driven by mixed power 20 of present embodiment, when the voltage between terminals Vb of storage battery 50 reduced to or be lower than predetermined threshold Vm1, the gate pole of inverter 41,42 was turned off to stop the electric power supply for motor M G1, MG2.Yet, more optional between battery tension Vb and the threshold value Vm1.What require usually is to stop the electric power supply for A/C 46 before the electric power supply that stops for motor M G1, MG2.A kind of feasibility correction can be at the gate pole that turn-offs inverter 45 certainly to stop timing for the electric power supply of A/C 46 through after the predetermined amount of time, and the gate pole that turn-offs inverter 41,42 is to stop the electric power supply for motor M G1, MG2.When some disappearances of driving sensation can be ignored, before stopping, can not stopping electric power supply for A/C 46 for the electric power supply of motor M G1, MG2.Can with for the electric power supply of A/C 46 stop simultaneously or even prior to carry out stopping for the stopping of electric power supply of A/C 46 for the electric power supply of motor M G1, MG2.
The foregoing description relates to stopping for the electric power supply of A/C 46 in the motor vehicle driven by mixed power 20.Technology of the present invention also can be applicable to stop for (for example, electric stabiliser) the electric power supply, and stop electric power supply for any a plurality of subsidiary engines in the motor vehicle driven by mixed power 20 of any subsidiary engine the A/C 46 in motor vehicle driven by mixed power 20.
The motor vehicle driven by mixed power 20 of present embodiment stops the electric power supply for A/C 46 when the voltage between terminals Vb of storage battery 50 reduces to or be lower than predetermined threshold Vs1, and stops the electric power supply for motor M G1, MG2 then when battery tension Vb further reduces to or be lower than predetermined threshold Vm1.A kind of Correction and Control program can be turn-offed the gate pole of inverter 47 in addition and be stopped electric power supply for EPS48 when battery tension Vb reduces to such an extent that be lower than predetermined threshold Ve, described threshold value Ve is lower than predetermined threshold Vm1 and can equals or a little more than the minimum required voltage of the proper handling that is used for EPS48.In this case, with before stopping the electric power supply for EPS48, this preferable procedure reduces the auxiliary torque that outputs to steering hardware from EPS48 gradually at the gate pole that turn-offs inverter 47.Flow process at Fig. 4 there is shown the correction routine that described electric power supply is controlled, and there is shown the routine of the corresponding EPS control of being carried out by EPS-ECU48b in the flow process of Fig. 5.
The correction electric power supply control routine of Fig. 4 has the identical step S100 of corresponding steps in the electric power supply control routine with the embodiment shown in Fig. 2 to S160.In the correction electric power supply control routine of Fig. 4, at step S140 after the processing of S160, with the voltage between terminals Vb of measured storage battery 50 further compare (step S200) with the predetermined threshold Ve that is lower than predetermined threshold Vs1, Vm1.When the voltage between terminals Vb of storage battery 50 reduced to such an extent that be lower than predetermined threshold Ve, CPU72 was to EPS-ECU48b output stopping requirement (step S210).When receiving the suspension of licence that sends from EPS-ECU48b (step S220), CPU72 turn-offs the gate pole (step S230) of the inverter 47 that is used for EPS48.
In the EPS of Fig. 5 control routine, whether EPS-ECU48b at first sets with the corresponding auxiliary torque Tas of deflection angle (step S300) and judges to have received from mixed electronic control unit 70 and stop requirement (step S310).Do not having reception to stop under the situation of requirement, EPS-ECU48b drive motor 48a is with output auxiliary torque Tas (step S360) and stop the EPS control routine.On the other hand, receiving from mixed electronic control unit 70 when stopping requirement, EPS-ECU48b adds one (step S320) for counting machine C.Counting machine C has initial value " 0 " and is added to predetermined reference value Cref.EPS-ECU48b sets the factor k that reduces gradually, and this factor k is along with the counting of counting machine C is reduced to numerical value " 0 " (step S330) up to predetermined reference value Cref gradually from numerical value " 1 ".Auxiliary torque Tas is proofreaied and correct the factor k that reduces gradually up to this continuously and is reached numerical value " 0 " (step S350) by multiplying each other with the factor k that reduces gradually.EPS-ECU48b drive motor 48a is with the auxiliary torque Tas (step S360) of output calibration and stop the EPS control routine afterwards.When the factor k that reduces gradually reached numerical value " 0 ", EPS-ECU48b was to mixed electronic control unit 70 output suspension of licence (step S370).The factor k that reduces gradually is reduced to the required time of numerical value " 0 " and depends on the execution interval of predetermined reference value Cref and EPS control.Reference value Cref is set to such an extent that the feasible factor k that reduces gradually reaches numerical value " 0 " in the time period in for example about 2 seconds.
When the voltage between terminals Vb of storage battery 50 reduced to such an extent that be lower than predetermined threshold Ve, the electric power supply control routine of execution graph 4 and the EPS control routine of Fig. 5 were to reduce the auxiliary torque Tas of EPS48 gradually in the time period in about 2 seconds.When the auxiliary torque Tas that reduces reached numerical value " 0 ", the gate pole of inverter 47 was turned off to stop the electric power supply for the motor 48a of EPS48.The reduction of the voltage between terminals Vb of the storage battery 50 during driving in response to motor vehicle driven by mixed power 20 and stopping before the electric power supply for the motor 48a of EPS48, the control of this correction reduces the auxiliary torque Tas of EPS48 gradually.This layout has advantageously been avoided turning to of momentary heavy.The factor k that the control program setting of this correction reduces gradually is to reduce the auxiliary torque Tas of EPS48 gradually.The factor k that reduces gradually can not be set in another correction, but can directly carry out the reduction gradually of auxiliary torque Tas.
In the motor vehicle driven by mixed power 20 of above-described present embodiment, driving engine 22 links to each other with sun and planet gear with motor M G1, MG2.This technology of the present invention is applicable to the elec. vehicle of any structure of the outputting power driving of passing through electrical motor.For example, this technology of the present invention is applicable to the motor vehicle driven by mixed power 120 of the correcting principle shown in Fig. 6.In the motor vehicle driven by mixed power 120 of this correcting principle, the power of motor M G2 can be connected to the vehicle bridge (that is, with drive wheel 64a, 64b bonded assembly vehicle bridge) different with the vehicle bridge that is connected gear ring axle 32a (that is, with drive wheel 63a, 63b bonded assembly vehicle bridge).In another example, this technology of the present invention is also applicable to the motor vehicle driven by mixed power 220 of another correcting principle shown in Fig. 7.The motor vehicle driven by mixed power 220 of this correcting principle comprises paired rotor electromotor 230, this paired rotor electromotor 230 have with the bent axle 26 bonded assembly internal rotors 232 of driving engine 22 and with the axle drive shaft bonded assembly outer rotor 234 of power to drive wheel 63a, 63b output.This paired rotor electromotor 230 to the axle drive shaft transmission, is transformed to electric power with remaining outputting power with the part of the power of driving engine 22 simultaneously.This technology of the present invention is not limited to described motor vehicle driven by mixed power in parallel, but also the elec. vehicle that is applicable to series hybrid vehicle and does not have driving engine and only drive by the outputting power of electrical motor.
Should think that all aspects of the foregoing description all are indicative and nonrestrictive.Under the prerequisite of scope that does not break away from principal character of the present invention or spirit, can there be multiple correction, change and variation.Scope of the present invention or spirit are specified by claims, rather than are specified by aforementioned description.
Industrial applicibility
Technology of the present invention can advantageously be applied to the process industry of electric vehicle.
Claims (14)
1. elec. vehicle that drives by the outputting power of electrical motor, described elec. vehicle comprises:
To described electrical motor transferring electric power and from the electricity accumulating unit of described electrical motor transferring electric power;
By the subsidiary engine that activates from the electric power supply of described electricity accumulating unit;
Drive and export the supplementary structure that turns to of steering torque to steering hardware by electric power supply from described electricity accumulating unit;
Measure the voltage measurement module of the voltage of described electricity accumulating unit; And
Control module, when the voltage of being measured by described voltage measurement module was reduced to or is lower than first predetermined value, described control module stopped from described electricity accumulating unit to described subsidiary engine and to the electric power supply of described electrical motor.
2. elec. vehicle according to claim 1 is characterized in that, described first predetermined value is greater than the described required minimum driving voltage of proper handling that turns to supplementary structure.
3. elec. vehicle according to claim 1 is characterized in that, when measured voltage was reduced to or be lower than described first predetermined value, described control module stopped the electric power supply to described subsidiary engine before the electric power supply that stops described electrical motor.
4. elec. vehicle according to claim 3, it is characterized in that, described control module stops the electric power supply to described subsidiary engine when measured voltage is reduced to or be lower than described first predetermined value, and stops the electric power supply to described electrical motor when measured voltage is further reduced to or be lower than than little second predetermined value of described first predetermined value.
5. elec. vehicle according to claim 1 is characterized in that, when measured voltage was reduced to than little the 3rd predetermined value of described first predetermined value, described control module stopped from described electricity accumulating unit to the described electric power supply that turns to supplementary structure.
6. elec. vehicle according to claim 5, it is characterized in that, when measured voltage is reduced to described the 3rd predetermined value, before stopping the described electric power supply that turns to supplementary structure, described control module reduces the steering torque that turns to supplementary structure to output to described steering hardware from described gradually.
7. elec. vehicle according to claim 6 is characterized in that, before stopping the described electric power supply that turns to supplementary structure, described control module is carried out the reduction gradually of described steering torque at the fixed time in the section.
8. according to each described elec. vehicle in the claim 1 to 7, it is characterized in that described subsidiary engine is an A/C.
9. according to each described elec. vehicle in the claim 1 to 7, described elec. vehicle also comprises:
Combustion engine; And
Electro-mechanical power input/output structure, described electro-mechanical power input/output structure is connected in the output shaft of described combustion engine and is connected in the axle drive shaft that links to each other with the vehicle bridge of described elec. vehicle, and at least a portion of the outputting power of described combustion engine is outputed to described axle drive shaft by electric power and mechanokinetic input and output
Wherein, described electrical motor is connected with described axle drive shaft with from described axle drive shaft imput power and output power to described axle drive shaft.
10. elec. vehicle according to claim 9 is characterized in that,
Described electro-mechanical power input/output structure comprises: triple axle power input/output mechanism, these three axles of described triple axle power input/output mechanism and the output shaft of described combustion engine, described axle drive shaft and the 3rd turning cylinder link to each other, and import and output to the automatically definite power of importing and outputing to this remaining axle from a remaining axle of power of these any two axles based on any two axles from these three axles; And from described the 3rd turning cylinder imput power and the electrical generator that outputs power to described the 3rd turning cylinder; And
Described control module is accompanied by the electric power supply that the stopping of electric power supply of described electrical motor is stopped to described electrical generator.
11. the control method by the elec. vehicle of the outputting power driving of electrical motor, described elec. vehicle comprises: electrical motor; To described electrical motor transferring electric power and from the electricity accumulating unit of described electrical motor transferring electric power; By the subsidiary engine that activates from the electric power supply of described electricity accumulating unit; And the supplementary structure that turns to that drives and export steering torque by electric power supply to steering hardware from described electricity accumulating unit;
Described control method may further comprise the steps:
(a) voltage of the described electricity accumulating unit of measurement; And
(b) when the voltage of described electricity accumulating unit measured in the described step (a) is reduced to or is lower than first predetermined value, stop from described electricity accumulating unit to described subsidiary engine and to the electric power supply of described electrical motor.
12. the control method of elec. vehicle according to claim 11, it is characterized in that, when measured voltage was reduced to or be lower than described first predetermined value, described step (b) stopped the electric power supply to described subsidiary engine before the electric power supply that stops described electrical motor.
13. the control method of elec. vehicle according to claim 12, it is characterized in that, described step (b) stops the electric power supply to described subsidiary engine when measured voltage is reduced to or be lower than described first predetermined value, and stops the electric power supply to described electrical motor when measured voltage is further reduced to or be lower than than little second predetermined value of described first predetermined value.
14. the control method of elec. vehicle according to claim 11, it is characterized in that, described control method is further comprising the steps of: when measured voltage is reduced to than little the 3rd predetermined value of described first predetermined value, before stopping, reducing the steering torque that turns to supplementary structure to output to described steering hardware from described gradually to the described electric power supply that turns to supplementary structure.
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| Application Number | Priority Date | Filing Date | Title |
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| JP2004244763 | 2004-08-25 | ||
| JP244763/2004 | 2004-08-25 | ||
| JP074874/2005 | 2005-03-16 |
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| CN1926005A true CN1926005A (en) | 2007-03-07 |
| CN100519258C CN100519258C (en) | 2009-07-29 |
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| CNB2005800066188A Expired - Fee Related CN100519258C (en) | 2004-08-25 | 2005-07-27 | Electric vehicle and its control method |
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| CN101868388A (en) * | 2007-11-20 | 2010-10-20 | 腓特烈斯港齿轮工厂股份公司 | Method for optimizing the utilization of an energy store connected to an electric machine |
| CN102085813A (en) * | 2009-12-04 | 2011-06-08 | 现代自动车株式会社 | Motor drive system for hybrid vehicle and method for controlling the same |
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