CN104316316A - Testing method and system of speed changer - Google Patents

Testing method and system of speed changer Download PDF

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Publication number
CN104316316A
CN104316316A CN201410408692.3A CN201410408692A CN104316316A CN 104316316 A CN104316316 A CN 104316316A CN 201410408692 A CN201410408692 A CN 201410408692A CN 104316316 A CN104316316 A CN 104316316A
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CN
China
Prior art keywords
clutch coupling
current
pressure
clutch
oil
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CN201410408692.3A
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Chinese (zh)
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CN104316316B (en
Inventor
郭伟
戴振坤
王书翰
鲁曦
范维栋
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盛瑞传动股份有限公司
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Priority to CN201410408692.3A priority Critical patent/CN104316316B/en
Publication of CN104316316A publication Critical patent/CN104316316A/en
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Publication of CN104316316B publication Critical patent/CN104316316B/en

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Abstract

The application discloses a testing method and system of a speed changer. The method is characterized in that an input torque of a testing motor and a speed changer structure parameter are obtained; a torque of a clutch is obtained by calculated according to the input torque of the testing motor and the speed changer structure parameter; a pressure signal of the clutch is obtained according to a pressure sensor at a pressure measuring port of the speed changer and a control current signal of the speed changer is obtained based on CAN communication, and a torque-pressure characteristic parameter, a pressure current characteristic parameter, and an oil charge characteristic parameter of the speed changer are obtained by calculation based on the signals; calculation is carried out to obtain a target current signal of a solenoid valve according to the characteristic parameters of the speed changer and the control torque of the clutch; and the opening degree of the solenoid valve is controlled based on the target current signal. Therefore, the clutch pressure is adjusted, thereby achieving an objective of reduction of a workload during the shifting quality improvement process.

Description

A kind of variator method of testing and system
Technical field
The application relates to transmission control technical field, more particularly, relates to a kind of variator method of testing and system.
Background technology
Transmission system in automobile driving system is by mechanical part, hydraulic part and electric control part are grouped into, in automobile production manufacture process, usually EOL detection (End of Line Test off-line test) can be carried out to described transmission system, to detect function and the properties of variator, when described variator detects after entrucking through EOL, even if the TCU in variator is (Transmission Control Unit, transmission control unit) Hardware & software system be all consistent, but because the hardware system of variator inevitably exists error because of parts quality and build-up tolerance, therefore after normally needing to adopt TCU software to carry out adaptive learning adjustment, just can obtain the target current value of variator, thus raising shift quality.
But need to carry out a large amount of experiments in adaptive learning process, thus cause the labour intensity when improving shift quality greatly to strengthen.
Summary of the invention
In view of this, the application provides a kind of variator method of testing and system, with the shift quality of the control accuracy and variator that improve TCU.
To achieve these goals, the existing scheme proposed is as follows:
A kind of variator method of testing, to be applied under variator in line process in characterisitic parameter Auto-Test System, to comprise:
Obtain the torque of testing of electric motors, the pressure signal of each clutch coupling of variator;
The torque of clutch coupling is calculated according to described motor torque and clutch pressure signals;
Obtain the characterisitic parameter of variator;
The target current signal of solenoid valve is obtained according to the characterisitic parameter of described variator and the torque calculation of described clutch coupling;
According to the aperture of described target current signal Controlling solenoid valve;
The characterisitic parameter of described acquisition variator comprises: the oil-filled characterisitic parameter obtaining the pressure to current characterisitic parameter of clutch coupling, obtain the torque pressure characterisitic parameter of clutch coupling, obtain clutch coupling.
Preferably, in above-mentioned variator method of testing, the pressure to current characterisitic parameter of described acquisition clutch coupling comprises:
Control inputs motor keeps rotating speed to be N;
The electromagnetic valve current of clutch coupling to be measured is increased according to the first predetermined current step-length every prefixed time interval, till risen to electric current corresponding to clutch coupling binding site maximum pressure value by minimum electromagnetic valve current, the electromagnetic valve current of clutch coupling to be measured is increased, till the electric current corresponding by clutch coupling binding site maximum pressure value rises to maximum electromagnetic valve current according to the second predetermined current step-length again every prefixed time interval;
The electromagnetic valve current of clutch coupling to be measured is reduced, till be reduced to electric current corresponding to clutch coupling binding site maximum pressure value by maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval; The electromagnetic valve current of clutch coupling to be measured is reduced, till the electric current corresponding by clutch coupling binding site maximum pressure value is reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Calculate the average value P in1 of electromagnetic valve current clutch pressure value that electromagnetic valve current is corresponding in last preset time period under each step-length electric current I n in uphill process;
Calculate the average value P in2 of electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Calculate the pressure to current characterisitic parameter that the electromagnetic valve current average value P in1 of clutch pressure value corresponding in the last prefixed time interval of each step-length electromagnetic valve current and electric current corresponding to the average value P inv of Pin2, described Pinv and described Pinv are clutch coupling.
Preferably, in above-mentioned variator method of testing, the torque pressure characterisitic parameter of described acquisition clutch coupling comprises:
Under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Control inputs motor speed is N, and output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ ifor the equivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Be increased in the first pre-set interval of maximum controlling current at electromagnetic valve current by minimum control electric current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
The force value that in first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
(P between preferred linear zone is chosen by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
According to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
By described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
Preferably, in above-mentioned variator method of testing, the oil-filled characterisitic parameter of described acquisition clutch coupling comprises:
By the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Calculate oil-filled time delay area S f(n);
Judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control, until described oil-filled time delay area S according to the initial oil-filled time after adjustment fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
A kind of variator test macro, described system comprises:
Transmission control unit, for obtaining the torque of testing of electric motors, the pressure signal of each clutch coupling of variator, and the torque of clutch coupling is calculated according to the torque of described testing of electric motors and the pressure signal of each clutch coupling of described variator, then the target current signal of solenoid valve is obtained according to the characterisitic parameter of variator and the torque calculation of described clutch coupling, and according to the aperture of described target current signal Controlling solenoid valve;
Be arranged on the storer on variator, described storer is for storing the characterisitic parameter of variator, and the characterisitic parameter of wherein said variator comprises: the storer of the oil-filled characterisitic parameter of the pressure to current characterisitic parameter of clutch coupling, the torque pressure characterisitic parameter of clutch coupling, clutch coupling.
Preferably, in above-mentioned variator method of testing, the pressure to current characterisitic parameter for the clutch coupling that adopts following method to get of the pressure to current characterisitic parameter of the clutch coupling in described storer:
Control inputs motor keeps rotating speed to be N;
The electromagnetic valve current of clutch coupling to be measured is increased according to the first predetermined current step-length every prefixed time interval, till risen to electric current corresponding to clutch coupling binding site maximum pressure value by minimum electromagnetic valve current, the electromagnetic valve current of clutch coupling to be measured is increased, till the electric current corresponding by clutch coupling binding site maximum pressure value rises to maximum electromagnetic valve current according to the second predetermined current step-length again every prefixed time interval;
The electromagnetic valve current of clutch coupling to be measured is reduced, till be reduced to electric current corresponding to clutch coupling binding site maximum pressure value by maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval; The electromagnetic valve current of clutch coupling to be measured is reduced, till the electric current corresponding by clutch coupling binding site maximum pressure value is reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Calculate the average value P in1 of electromagnetic valve current clutch pressure value that electromagnetic valve current is corresponding in last preset time period under each step-length electric current I n in uphill process;
Calculate the average value P in2 of electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Calculate the pressure to current characterisitic parameter that the electromagnetic valve current average value P in1 of clutch pressure value corresponding in the last prefixed time interval of each step-length electromagnetic valve current and electric current corresponding to the average value P inv of Pin2, described Pinv and described Pinv are clutch coupling.
Preferably, in above-mentioned variator method of testing, the torque pressure characterisitic parameter of the clutch coupling in described storer is the torque pressure characterisitic parameter of the clutch coupling adopting following method to get:
Under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Control inputs motor speed is N, and output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ ifor the equivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Be increased in the first pre-set interval of maximum controlling current at electromagnetic valve current by minimum control electric current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
The force value that in first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
(P between preferred linear zone is chosen by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
According to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
By described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
Preferably, in above-mentioned variator method of testing, the torque pressure characterisitic parameter of the clutch coupling in described storer is the oil-filled characterisitic parameter of the clutch coupling adopting following method to get:
By the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Calculate oil-filled time delay area S f(n);
Judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control, until described oil-filled time delay area S according to the initial oil-filled time after adjustment fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
As can be seen from above-mentioned technical scheme, variator method of testing disclosed in the present application and system, by adopting the torque of the characterisitic parameter of described variator to described and described testing of electric motors and the pressure signal of each clutch coupling of variator, and the torque of clutch coupling is calculated according to described motor torque and clutch pressure signals, the characterisitic parameter of last described variator and the torque calculation of described clutch coupling obtain the target current signal of solenoid valve, and according to the aperture of described target current signal Controlling solenoid valve, visible, compare and obviously reduce with technical scheme workload of the prior art, in test process, adopt the characterisitic parameter between the torque of clutch coupling and pressure simultaneously, characterisitic parameter between pressure and electric current and oil-filled characterisitic parameter improve the control accuracy of variator significantly, improve the shift quality of variator.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the application, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The process flow diagram of Fig. 1 variator method of testing disclosed in the embodiment of the present application;
Fig. 2 is the disclosed process flow diagram obtaining the pressure to current characterisitic parameter of clutch coupling of the embodiment of the present application;
Fig. 3 is clutch pressure disclosed in the present application, current relationship schematic diagram;
Fig. 4 a is clutch pressure ascent stage pressure, current relationship schematic diagram;
Fig. 4 b is clutch pressure decline stage pressure, current relationship schematic diagram;
Fig. 4 c is the average pressure value in clutch coupling rise and fall stage, the schematic diagram of current relationship;
Fig. 5 is the disclosed process flow diagram obtaining the torque pressure characterisitic parameter of clutch coupling of the embodiment of the present application;
The relation schematic diagram of Fig. 6 clutch coupling input motor torque, electromagnetic valve current, clutch pressure disclosed in embodiment;
Fig. 7 is the disclosed process flow diagram obtaining the oil-filled characterisitic parameter of clutch coupling of another embodiment of the application:
Fig. 8 is the schematic diagram of the different oil-filled result of three kinds, clutch coupling;
The structural drawing of Fig. 9 variator test macro disclosed in the embodiment of the present application.
Embodiment
Be directed in prior art and adopt adaptive learning to improve shift quality, and the problem that the worker workload caused is large, this application discloses a kind of variator method of testing and system.
Below in conjunction with the accompanying drawing in the embodiment of the present application, be clearly and completely described the technical scheme in the embodiment of the present application, obviously, described embodiment is only some embodiments of the present application, instead of whole embodiments.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
The process flow diagram of Fig. 1 variator method of testing disclosed in the embodiment of the present application.
See Fig. 1, described method comprises:
Step S101: obtain the torque of testing of electric motors, the pressure signal of each clutch coupling of variator, wherein the pressure signal of each clutch coupling of variator is the pressure signal of the pressure transducer acquisition clutch coupling according to variator pressure tap;
Step S102: the torque calculating clutch coupling according to described motor torque and clutch pressure signals;
Step S103: the characterisitic parameter obtaining variator, the characterisitic parameter of described variator comprises: the oil-filled characterisitic parameter of the pressure to current characterisitic parameter of clutch coupling, the torque pressure characterisitic parameter of clutch coupling, clutch coupling, and wherein said pressure to current characterisitic parameter, torque pressure characterisitic parameter, oil-filled characterisitic parameter are according to signal acquisitions such as the pressure signal of clutch coupling, the control current signals of variator that obtained by CAN communication;
Step S104: the target current signal obtaining solenoid valve according to the characterisitic parameter of described variator and the torque calculation of described clutch coupling;
Step S105: according to the aperture of described target current signal Controlling solenoid valve, the adjustment of clutch pressure.
For the oil-filled characterisitic parameter of the torque pressure characterisitic parameter of the pressure to current characterisitic parameter of the clutch coupling in above-described embodiment, clutch coupling and clutch coupling as the characterisitic parameter of described variator, in the above-described embodiments before disclosed described variator method of testing, the characterisitic parameter obtaining described variator in advance can also be comprised.
Fig. 2 is the disclosed process flow diagram obtaining the pressure to current characterisitic parameter of clutch coupling of the embodiment of the present application.
See Fig. 2, the pressure to current characterisitic parameter of the described clutch coupling of described acquisition comprises and can comprise:
Step S201: control inputs motor keeps rotating speed to be N; It is pointed out that the rotating speed of described input motor can adjust according to user's request here, such as, described input motor speed can be 2000rpm, and therefore the application does not specifically limit the rotating speed size of described input motor;
Step S202: increase the electromagnetic valve current of clutch coupling to be measured according to the first predetermined current step-length every prefixed time interval, when electromagnetic valve current rises to electric current corresponding to clutch coupling binding site maximum pressure value, electromagnetic valve current is increased, till rising to maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval;
Step S203: reduce electromagnetic valve current, till being reduced to electric current corresponding to clutch coupling binding site maximum pressure value according to the second predetermined current step-length every prefixed time interval; Electromagnetic valve current is reduced, till being reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Step S204: the average value P in1 calculating electromagnetic valve current clutch pressure value that electromagnetic valve current is corresponding in last preset time period under each step-length electric current I n in uphill process;
Step S205: the average value P in2 calculating electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Step S206: the average value P in1 of clutch pressure value and the average value P inv of Pin2, the described Pinv that calculate electromagnetic valve current correspondence in the last prefixed time interval of each step-length electromagnetic valve current are the pressure to current characterisitic parameter being clutch coupling at the offset current that described Pinv and described Pinv is corresponding.
Employing said method can effectively reduce transmission fluid pressing system because the variator pressure current characteristics difference that parts difference, assembling difference are brought, and can improve variator TCU software control precision.
Fig. 3 is clutch pressure disclosed in the present application, current relationship schematic diagram.
Fig. 4 a is clutch pressure ascent stage pressure, current relationship schematic diagram.
Fig. 4 b is clutch pressure decline stage pressure, current relationship schematic diagram.
Fig. 4 c is the average pressure value in clutch coupling rise and fall stage, the schematic diagram of current relationship.
Be for the described input motor in above-described embodiment is 2000rpm, described prefixed time interval is greater than 50ms, the fixing electric current that slippage is 40rpm, clutch coupling binding site maximum pressure value is corresponding is 400mA, minimum solenoid valve measuring current I_L_LIMIT is 300mA, maximum solenoid valve measuring current I_H_LIMIT is 1000mA, the first predetermined current step-length △ I_KP is 10mA, the second predetermined current step-length △ I_AKP is 100mA, last preset time period is 50ms the pressure of clutch coupling, the relation schematic diagram of electric current see Fig. 3, Fig. 3.
See Fig. 3-Fig. 4 c, the method obtaining clutch coupling voltage-current characteristic parameter in the present embodiment comprises:
Step 1, control inputs motor to 2000rpm, and keep constant rotational speed;
Step 2, according to the current control mode shown in Fig. 3, control the electromagnetic valve current value of clutch coupling to be measured, and gather the force value of target current value and clutch coupling according to the sample frequency of 1KHZ;
Step 3, calculating current rise and each step-length electric current I of decline stage nthe mean value of the clutch pressure value that lower last 50ms is corresponding for the steady state pressure value of this electric current;
Step 4, according to I nwith the value of Pin1, according to the method for Fig. 4 a and Fig. 4 b, draw respectively and obtain electric current and rise and clutch pressure in decline process and the family curve of current value;
Step 5, according to rising and clutch pressure in decline process and current value family curve, getting and rising under same step-length electric current and the mean value of force value of decline stage, to obtain clutch pressure in Fig. 4 c and the characteristic intermediate value curve of current value;
Step 6, using described clutch pressure and the current value characteristic intermediate value curve pressure to current characterisitic parameter as described clutch coupling, wherein it should be noted that the pressure to current characterisitic parameter of described clutch coupling can be complete clutch pressure and the characteristic intermediate value curve of current value, some coordinate points that also can get on for described intermediate value curve.
Fig. 5 is the disclosed process flow diagram obtaining the torque pressure characterisitic parameter of clutch coupling of the embodiment of the present application.
Torque pressure characterisitic parameter see Fig. 5, described acquisition clutch coupling comprises:
Step S501: under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Step S502: control inputs motor speed is N, output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ iequivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Step S503: be increased in the first pre-set interval of maximum controlling current by minimum control electric current at electromagnetic valve current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
Step S504: the force value that in the first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Step S505: be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
Step S506: choose (P between preferred linear zone by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
Step S507: according to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Step S508: adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
Step S509: by described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
The activating pressure characterisitic parameter of clutch coupling can be obtained by said method accurately, the property difference that variator mechanical system is brought because of parts difference, assembling difference can be effectively reduced, variator TCU software control precision can be improved.
The relation schematic diagram of Fig. 6 clutch coupling input motor torque, electromagnetic valve current, clutch pressure disclosed in embodiment.
See Fig. 6, Fig. 6 for be 2000rpm with the described input motor speed in above-described embodiment, fixing slippage is 40rpm, described maximum controlling current is 1000mA, described minimum control current value is 0mA, pre-set interval described in described first is for (320mA, graph of a relation between the input motor torque of clutch coupling when 400mA), described first rate of change is 1mA/200ms, the second pre-set interval is (400mA, 550mA), described first rate of change is 2mA/100ms, electromagnetic valve current, clutch pressure.
See Fig. 6, the torque pressure characterisitic parameter process of the calculating clutch coupling in this embodiment comprises:
Step 1, control under certain gear that wherein the electromagnetic valve current value of two closed clutch couplinges and the current value of converter lockout solenoid valve are to maximum controlling current 1000mA, the electromagnetic valve current of clutch coupling to be measured is 0mA.Then control inputs motor is to 2000rpm, controls output motor to (2000 × λ i-40)/λ orpm, keeps clutch coupling to be measured to be in the slippage of 40rpm;
Step 2, control the electromagnetic valve current of clutch coupling to be measured according to shown in Fig. 5, increase at the rate of change of 320-400mA interval 1mA/200ms, increase at the rate of change of 400-550mA interval 2mA/100ms, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c;
When step 3, clutch solenoid valve electric current are between 320-400mA, along with the increase of electric current, the pressure of clutch coupling increases gradually, but is T in the torque of starting stage input motor dragremain unchanged, wherein T dragfor transmission oil pump torque loss, mechanical friction torque loss, fluid torque loss sum, what be also called variator pulls torque, along with the continuation of clutch pressure increases, because friction disc to be measured starts to eliminate gap and transmitting torque, cause the torque inputting motor to start to increase, the clutch pressure defining first input motor increase 2Nm corresponding moment is the activating pressure P of this clutch system kP;
Step 4, electromagnetic valve current are within the scope of 400-550mA, and along with the pressure of clutch coupling linearly increases, input the increase that the torque of motor is also linear, the maximum pressure recording this section of range of current internal clutch is P max, the force value of clutch coupling clutch coupling when 400mA is designated as P t, in order to improve the computational accuracy of the torque pressure characterisitic parameter of clutch coupling, can only with the region that pressure is the most linear when the torque pressure characterisitic parameter of matching clutch coupling: (P t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2, input motor torque corresponding to this pressure span is (T t2P_DN, T t2P_UP).
Step 5, according to the clutch torque coefficient f under each gear of automatic transmission c(from transmission input shaft torque conversion to the conversion coefficient of clutch torque) and variator pull torque T dragcalculate the net torque T that clutch coupling transmits c: T c=f c(T e-T drag);
Step 6, by (t t2P_DN, t t2P_UP) interval in corresponding clutch torque and pressure adopt least-squares algorithm linear fitting to obtain the straight line of the torque pressure characterisitic parameter of clutch coupling: P c_10Nm=k t2P× (T c-10), wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
Step 7, by described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
Fig. 7 is the disclosed process flow diagram obtaining the oil-filled characterisitic parameter of clutch coupling of another embodiment of the application.
Fig. 8 is the schematic diagram of the different oil-filled result of three kinds, clutch coupling.
See Fig. 7, the flow process obtaining the oil-filled characterisitic parameter of described clutch coupling in the present embodiment comprises:
Step S701: by the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Step S702: transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Step S703: described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Step S704: calculate oil-filled time delay area S f(n);
Step S605: judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control according to the initial oil-filled time after adjustment and perform step S702, until described oil-filled time delay area S fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
Wherein, oil-filled time delay area S is calculated fn the process of () can comprise:
A, acquisition actual pressure P smaximal value P s_maxand the time t2 of correspondence;
B, with P s_maxfor benchmark, obtain than described P s_maxfirst pressure value P of little 1.5bar s_Tand the time t1 of correspondence;
C, by the actual pressure P in time t1-t2 scarry out fitting a straight line by least square method and obtain straight line L, its cathetus L represents P sdesirable actual pressure, its represents the delay that to there is not pressure at pressure ramp ascent stage;
D, by desirable actual pressure L and actual pressure P smathematic interpolation actual pressure P sdelay size, and obtain maximum difference Δ P maxcorresponding time t max.
E, to time interval (t max-10, t max+ 10) the pressure difference value L-P in scarry out integral and calculating and obtain pressure retarded area S f(n), computing formula is:
The structural drawing of Fig. 8 variator test macro disclosed in the embodiment of the present application.
Be understandable that corresponding to said method, disclosed herein as well is a kind of transmission system, see Fig. 8, described transmission system can comprise:
Transmission control unit 1, for obtaining input torque, the speed changer structure parameter of testing of electric motors, with the characterisitic parameter of variator, and the torque of clutch coupling is calculated according to described testing of electric motors input torque and described speed changer structure parameter, then the target current signal of solenoid valve is obtained according to the characterisitic parameter of described variator and the torque calculation of described clutch coupling, and according to the aperture of the solenoid valve in described target current signal controlled variator;
Be arranged on the storer on variator, for storing the characterisitic parameter of variator.
Wherein, described storer 1 is for storing the storer of the pressure to current characterisitic parameter of clutch coupling, the torque pressure characterisitic parameter of clutch coupling, the oil-filled characterisitic parameter of clutch coupling, and described storer can be SUBROM storer.
Be understandable that, corresponding with said method, the pressure to current characterisitic parameter of clutch coupling for adopting following method to get of the pressure to current characterisitic parameter of the clutch coupling stored in described storer 1:
Control inputs motor keeps rotating speed to be N;
The electromagnetic valve current of clutch coupling to be measured is increased according to the first predetermined current step-length every prefixed time interval, till risen to electric current corresponding to clutch coupling binding site maximum pressure value by minimum electromagnetic valve current, the electromagnetic valve current of clutch coupling to be measured is increased, till the electric current corresponding by clutch coupling binding site maximum pressure value rises to maximum electromagnetic valve current according to the second predetermined current step-length again every prefixed time interval;
The electromagnetic valve current of clutch coupling to be measured is reduced, till be reduced to electric current corresponding to clutch coupling binding site maximum pressure value by maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval; The electromagnetic valve current of clutch coupling to be measured is reduced, till the electric current corresponding by clutch coupling binding site maximum pressure value is reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Calculate electromagnetic valve current at the average value P in1 of clutch pressure value of correspondence in last preset time period under each step-length electric current I n of electromagnetic valve current in uphill process;
Calculate the average value P in2 of electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Calculate the pressure to current characterisitic parameter that the electromagnetic valve current average value P in1 of clutch pressure value corresponding in the last prefixed time interval of each step-length electromagnetic valve current and step-length electric current corresponding to the average value P inv of Pin2, described Pinv and described Pinv are clutch coupling.
Corresponding with described method, in described storer, the torque pressure characterisitic parameter of clutch coupling is the torque pressure characterisitic parameter of the clutch coupling adopting following method to get:
Under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Control inputs motor speed is N, and output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ ifor the equivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Be increased in the first pre-set interval of maximum controlling current at electromagnetic valve current by minimum control electric current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
The force value that in first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
(P between preferred linear zone is chosen by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
According to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
By described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
Corresponding with described method, the oil-filled characterisitic parameter of the clutch coupling in described storer is the oil-filled characterisitic parameter of the clutch coupling adopting following method to get:
By the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Calculate oil-filled time delay area S f(n);
Judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control, until described oil-filled time delay area S according to the initial oil-filled time after adjustment fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operational zone, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the application.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from the spirit or scope of the application, can realize in other embodiments.Therefore, the application can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (8)

1. a variator method of testing, to be applied under variator in line process in characterisitic parameter Auto-Test System, to it is characterized in that, comprising:
Obtain the torque of testing of electric motors, the pressure signal of each clutch coupling of variator;
The torque of clutch coupling is calculated according to described motor torque and clutch pressure signals;
Obtain the characterisitic parameter of variator;
The target current signal of solenoid valve is obtained according to the characterisitic parameter of described variator and the torque calculation of described clutch coupling;
According to the aperture of described target current signal Controlling solenoid valve;
The characterisitic parameter of described acquisition variator comprises: the oil-filled characterisitic parameter obtaining the pressure to current characterisitic parameter of clutch coupling, obtain the torque pressure characterisitic parameter of clutch coupling, obtain clutch coupling.
2. according to the variator method of testing in claim 1, it is characterized in that, the pressure to current characterisitic parameter of described acquisition clutch coupling comprises:
Control inputs motor keeps rotating speed to be N;
The electromagnetic valve current of clutch coupling to be measured is increased according to the first predetermined current step-length every prefixed time interval, till risen to electric current corresponding to clutch coupling binding site maximum pressure value by minimum electromagnetic valve current, the electromagnetic valve current of clutch coupling to be measured is increased, till the electric current corresponding by clutch coupling binding site maximum pressure value rises to maximum electromagnetic valve current according to the second predetermined current step-length again every prefixed time interval;
The electromagnetic valve current of clutch coupling to be measured is reduced, till be reduced to electric current corresponding to clutch coupling binding site maximum pressure value by maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval; The electromagnetic valve current of clutch coupling to be measured is reduced, till the electric current corresponding by clutch coupling binding site maximum pressure value is reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Calculate the average value P in1 of electromagnetic valve current clutch pressure value that electromagnetic valve current is corresponding in last preset time period under each step-length electric current I n in uphill process;
Calculate the average value P in2 of electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Calculate the pressure to current characterisitic parameter that the electromagnetic valve current average value P in1 of clutch pressure value corresponding in the last prefixed time interval of each step-length electromagnetic valve current and electric current corresponding to the average value P inv of Pin2, described Pinv and described Pinv are clutch coupling.
3. according to the variator method of testing in claim 2, it is characterized in that, the torque pressure characterisitic parameter of described acquisition clutch coupling comprises:
Under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Control inputs motor speed is N, and output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ ifor the equivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Be increased in the first pre-set interval of maximum controlling current at electromagnetic valve current by minimum control electric current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
The force value that in first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
(P between preferred linear zone is chosen by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
According to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
By described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
4. according to the variator method of testing in claim 3, it is characterized in that, the oil-filled characterisitic parameter of described acquisition clutch coupling comprises:
By the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Calculate oil-filled time delay area S f(n);
Judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control, until described oil-filled time delay area S according to the initial oil-filled time after adjustment fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
5. a variator test macro, is characterized in that, described system comprises:
Transmission control unit, for obtaining the torque of testing of electric motors, the pressure signal of each clutch coupling of variator, and the torque of clutch coupling is calculated according to the torque of described testing of electric motors and the pressure signal of each clutch coupling of described variator, then the target current signal of solenoid valve is obtained according to the characterisitic parameter of variator and the torque calculation of described clutch coupling, and according to the aperture of described target current signal Controlling solenoid valve;
Be arranged on the storer on variator, described storer is for storing the characterisitic parameter of variator, and the characterisitic parameter of wherein said variator comprises: the storer of the oil-filled characterisitic parameter of the pressure to current characterisitic parameter of clutch coupling, the torque pressure characterisitic parameter of clutch coupling, clutch coupling.
6. according to the variator test macro in claim 5, it is characterized in that, the pressure to current characterisitic parameter for the clutch coupling that adopts following method to get of the pressure to current characterisitic parameter of the clutch coupling in described storer:
Control inputs motor keeps rotating speed to be N;
The electromagnetic valve current of clutch coupling to be measured is increased according to the first predetermined current step-length every prefixed time interval, till risen to electric current corresponding to clutch coupling binding site maximum pressure value by minimum electromagnetic valve current, the electromagnetic valve current of clutch coupling to be measured is increased, till the electric current corresponding by clutch coupling binding site maximum pressure value rises to maximum electromagnetic valve current according to the second predetermined current step-length again every prefixed time interval;
The electromagnetic valve current of clutch coupling to be measured is reduced, till be reduced to electric current corresponding to clutch coupling binding site maximum pressure value by maximum electromagnetic valve current according to the second predetermined current step-length every prefixed time interval; The electromagnetic valve current of clutch coupling to be measured is reduced, till the electric current corresponding by clutch coupling binding site maximum pressure value is reduced to minimum electromagnetic valve current according to the first predetermined current step-length again every prefixed time interval;
Calculate the average value P in1 of electromagnetic valve current clutch pressure value that electromagnetic valve current is corresponding in last preset time period under each step-length electric current I n in uphill process;
Calculate the average value P in2 of electromagnetic valve current clutch pressure value corresponding in last preset time period under each step-length of electromagnetic valve current electric current I n in decline process;
Calculate the pressure to current characterisitic parameter that the electromagnetic valve current average value P in1 of clutch pressure value corresponding in the last prefixed time interval of each step-length electromagnetic valve current and electric current corresponding to the average value P inv of Pin2, described Pinv and described Pinv are clutch coupling.
7. according to the variator test macro in claim 6, it is characterized in that, the torque pressure characterisitic parameter of the clutch coupling in described storer is the torque pressure characterisitic parameter of the clutch coupling adopting following method to get:
Under controlling a certain gear, the electromagnetic valve current and the converter lockout electromagnetic valve current that control two clutch couplinges close, and the current value controlling the 3rd clutch coupling is increased to maximum controlling current by minimum control electric current;
Control inputs motor speed is N, and output motor rotating speed is (N × λ i-M)/λ o, wherein M is that clutch coupling fixes slippage, λ ifor the equivalent ratio of gear from the input shaft rotating speed equivalence of variator to clutch coupling one end to be measured rotating speed, λ ofor the equivalence of output shaft rotating speed is to the equivalent ratio of gear of clutch coupling other end rotating speed to be measured;
Be increased in the first pre-set interval of maximum controlling current at electromagnetic valve current by minimum control electric current, current value adopts the first rate of change to increase; In the second pre-set interval, the second rate of change is adopted to increase, the torque T of the Motor torque of record input simultaneously instrument ewith the pressure P of clutch coupling c, wherein said first rate of change is less than the second rate of change, and in time relationship, described first pre-set interval is adjacent and in advance in described second pre-set interval;
The force value that in first pre-set interval described in electromagnetic valve current, first input motor increases clutch coupling corresponding to moment of 2Nm as clutch system in conjunction with pressure P kP;
Be recorded in the second pre-set interval internal clutch maximum pressure value P max, the force value being recorded in the clutch coupling of initial time in described second pre-set interval is P t;
(P between preferred linear zone is chosen by described second pre-set interval t2P_DN, P t2P_UP), wherein P t2P_UP=P max-0.4, P t2P_DN=P t+ 0.2;
According to the moment coefficient f of clutch coupling under each gear of variator cwith variator pull torque T dragaccording to formula T c=f c(T e-T drag) calculate clutch coupling transmit net torque T c;
Adopt least square method to carry out linear fit by clutch torque corresponding in described preferred linear zone and pressure, obtain the torque pressure family curve of clutch coupling: P c_10Nm=k t2P× (T c-10); Wherein P c_10Nmfor clutch coupling transmits the clutch pressure corresponding to 10Nm, k t2Pfor the slope of the torque pressure characterisitic parameter of clutch coupling;
By described clutch system in conjunction with pressure P kP, clutch coupling the slope k of torque pressure characterisitic parameter t2Pthe clutch pressure P corresponding to 10Nm is transmitted with clutch coupling c_10Nmas the torque pressure characterisitic parameter of described clutch coupling.
8. the variator test macro in claim 7, is characterized in that, the torque pressure characterisitic parameter of the clutch coupling in described storer is the oil-filled characterisitic parameter of the clutch coupling adopting following method to get:
By the pressure to current characterisitic parameter of described clutch coupling and described clutch system in conjunction with pressure P kPas the oil-filled controling parameters of adjustment, and control inputs motor speed is N;
Transmission control unit is according to the initial oil-filled time T got fTcarry out oil-filled control;
Described control module presets oil-filled controling parameters and the oil-filled controling parameters of described adjustment calculates target control pressure, and the pressure to current characterisitic parameter Controlling solenoid valve electric current of foundation clutch coupling;
Calculate oil-filled time delay area S f(n);
Judge oil-filled time delay area S fn whether () be less than preset value, if so, then by described initial oil-filled time T fTas the oil-filled characterisitic parameter of clutch coupling, otherwise according to formula T fT1=T fT+ κ (S f(n)) S fn () regulates the initial oil-filled time, and the oil-filled time T that will calculate fT1as the initial oil-filled time, re-start oil-filled control, until described oil-filled time delay area S according to the initial oil-filled time after adjustment fn () is less than preset value, by oil-filled time delay area S fthe initial oil-filled time after adjustment corresponding when () is less than preset value is n as the oil-filled characterisitic parameter of clutch coupling.
CN201410408692.3A 2014-08-19 2014-08-19 Testing method and system of speed changer CN104316316B (en)

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CN106704577B (en) * 2017-02-14 2019-05-31 芜湖万里扬变速器有限公司 A kind of stepless automatic transmission case clutch control based on torque model
CN108869839A (en) * 2017-05-11 2018-11-23 上海汽车集团股份有限公司 The flow-compensated method and device of flow variable force solenoid valve
CN108869839B (en) * 2017-05-11 2020-06-05 上海汽车集团股份有限公司 Flow compensation method and device of flow variable force electromagnetic valve
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