CN100543347C

CN100543347C - Adjustment is by the method and system of the gear shift of engine-driven speed changer

Info

Publication number: CN100543347C
Application number: CNB2006100934740A
Authority: CN
Inventors: C·J·特鲁什; D·W·赖特; C·M·法扎凯利; J·E·马拉诺
Original assignee: GM Global Technology Operations LLC
Current assignee: GM Global Technology Operations LLC
Priority date: 2005-05-23
Filing date: 2006-05-23
Publication date: 2009-09-23
Anticipated expiration: 2026-05-23
Also published as: CN101012881A

Abstract

The present invention relates to the method for a kind of adjustment, comprise that calculating the first moment of torsion sum of errors calculates the second moment of torsion error by the gear shift of engine-driven speed changer.Calculate compensation torque based on the first moment of torsion sum of errors, the second moment of torsion error.Adjust gear shift based on compensation torque.

Description

Adjustment is by the method and system of the gear shift of engine-driven speed changer

The cross reference of related application

[0001] the application requires the U.S. Provisional Application No.60/683 of submission on May 23rd, 2005,578 preference.Its whole disclosures merge to here by reference.

Technical field

[0002] the present invention relates to engine system, relate more specifically to the Engine torque error learn (TEL:engine torque errorlearning) in dynamic vehicle detection (DVT:dynamic vehicle test).

Background technique

[0003] internal-combustion engine in the air cylinder driven piston combustion fuel and AIR MIXTURES to produce driving torque.Motor is by Coupling device drive speed transmission (transmission).Under the situation of automatic transmission, Coupling device comprises torque converter.This speed changer is sent to transmission system (driveline) by one in a plurality of gears ratios with driving torque.Speed changer is changed between the gear ratio based on gear shift (shift) standard and vehicle operation state.

[0004] speed changer generally includes a plurality of clutches, its alternatively interlock so that set up required gear ratio.When gear shift between the gear ratio, the gear shift that can produce clutch to clutch.More specifically, at least one clutch breaks away from ((off-going) clutch that is about to leave away) and another clutch seizure (that is (on-coming) on the horizon clutch) simultaneously.The control of clutch to clutch gear shift is based on the Engine torque (T of estimation _EST).T _ESTUse is calculated based on the moment of torsion estimation of engine operating condition and is determined.But, T _ESTThe shift quality of required clutch to clutch always can enough accurately be provided.More specifically, speed changer is to T _ESTIn error very sensitive, and this has reduced the shift quality of speed changer.

Summary of the invention

[0005] therefore, the invention provides the method for a kind of adjustment by the gear shift (gear shift) of engine-driven speed changer.This method comprises that calculating the first moment of torsion sum of errors calculates the second moment of torsion error.Determine compensation torque based on the first moment of torsion sum of errors, the second moment of torsion error.Adjust this gear shift based on the moment of torsion of this compensation.

[0006] in a feature, compensation torque is from based on determining the question blank of the first moment of torsion sum of errors, the second moment of torsion error.

[0007] in another feature, this method also comprises definite Engine torque of estimating and proofreaies and correct the Engine torque estimated so that the estimating engine moment of torsion of correction to be provided based on compensation torque.Estimating engine moment of torsion based on this correction is adjusted this gear shift.

[0008] in other feature, this method also comprises to be determined at the first estimating engine moment of torsion of first engine speed and determines to measure Engine torque at first engine speed first.Measure Engine torque based on the first estimating engine moment of torsion and first and calculate the first moment of torsion error.Determine the second estimating engine moment of torsion and determine that at second engine speed second measures Engine torque at second engine speed.Measure Engine torque based on the second estimating engine moment of torsion and second and calculate the second moment of torsion error.

[0009] in another feature again, this method also comprises the binding condition (tie-up condition) of a plurality of clutches so that speed changer to be provided of this speed changer of interlock.Calculate the first moment of torsion sum of errors, the second moment of torsion error based on the operational condition in this binding condition.

What [0010] other application of the present invention can become from the following detailed description is more clear.Should be understood that though detailed description and concrete example have been explained the preferred embodiments of the present invention, it only plays illustrative purposes and is not limited to scope of the present invention.

Description of drawings

[0011] with reference to the accompanying drawings with detailed description, it is more comprehensive that the understanding of the present invention will become, wherein:

[0012] Fig. 1 is the functional block diagram of exemplary Vehicular system;

[0013] Fig. 2 is the functional block diagram of speed changer of the Vehicular system of Fig. 1; With

[0014] Fig. 3 is the flow chart by the performed illustrative steps of moment of torsion error learn of the present invention (TEL) program.

Embodiment

[0015] description of Yi Xia preferred embodiment only is schematic and unrestricted the present invention, its application or use.For simplicity's sake, represent similar element with identical mark in the accompanying drawings.As used herein, term module is meant processor (shared, as to distribute or cluster) and storage, combinational logic circuit and/or other suitable assemblies that the function of describing can be provided of specific integrated circuit (ASIC), electronic circuit, the one or more softwares of execution or firmware program.

[0016], schematically describes exemplary Vehicular system 10 with reference to figure 1.Vehicular system 10 comprises motor 12, its in cylinder (not shown) internal combustion gasoline and AIR MIXTURES to drive the piston that is placed in slidably in the cylinder.Piston drives by torque converter 16 and is used for the arbor (not shown) of drive speed transmission 14.Air is drawn into intake manifold 20 by air door (throttle) 18, this manifold with air distribution in each cylinder.Be discharged to the follow-on system (not shown) by the exhaust that combustion disposal produced by gas exhaust manifold 22.

[0017] torque converter 16 is to make the hydrodynamic coupling that starts function to be independent of speed changer 14 rotations to a certain extent.Though do not illustrate, torque converter 16 comprises pump, turbine and stator.Pump is the centrifugal pump that is driven by motor 12.By the fluid driven turbin of pump suction, it and then drive speed transmission 14 again.Before the fluid that returns from turbine clashed into pump once more, stator was redirected it to increase the efficient of torque converter 16.Under the torque converter stop condition, pump rotation and turbine does not rotate.

[0018] control module 24 is adjusted the operation of Vehicular system 10.More specifically, control module 24 is based on from the signal of the operator's input device that includes but not limited to gear selector 26 and braking pedal 28 and operate motor 12 and speed changer 14.Gear selector 26 can place speed changer 14 operator to include but not limited to one that drives shelves (D), a reverse gear (R), neutral (N) and park a plurality of gears such as (P).Control module 24 can also be based on from the signal of the various sensors that include but not limited to engine RPM sensor 30 and adjust the work of motor.

[0019], shown exemplary speed changer 14 with reference now to Fig. 2.Exemplary speed changer 14 is six gear transmissions, its be disclosed in common transfer in the U.S. Patent No. 6308125 of authorizing October 23 calendar year 2001, this patent name is " Adaptive Clutch Control of a Closed-ThrottleDownshift (closed throttle is turned down the adaptive clutch control of shelves) ", and its full content discloses incorporated herein by reference.Be clear that very the concrete speed changer of Miao Shuing only is exemplary here, moment of torsion error compensation of the present invention control can realize by various other speed changers.

[0020] speed changer 14 comprises input shaft 40, output shaft 42 and three

planetary gear set

44A, 44B and 44C that interconnect respectively.Planetary gear set 44A, 44B and 44C comprise

central gear

46A, 46B, 46C separately,

carriage

48A, 48B, 48C,

planetary gear set

50A, 50B and 50C, and

ring gear

52A, 52B, 52C.Speed changer 114 also comprises clutch C1-C5, its optionally interlock be used for setting up the expectation gear ratio of speed changer 14.More specifically, input shaft 40 is the central gear 46A of driving cluster gear 44A continuously, optionally by clutch C1 driving cluster gear 44B, 44C,

central gear

46B, 46C, and by the clutch C2 carriage 48B of driving cluster gear 44B optionally.Ring gear 52A, the 52B of

gear train

44A, 44B, 44C, 52C are optionally respectively by clutch C3, C4 and C5 ground connection.

[0021] as shown in the following Table 1, state (that is, interlock or separation) that can solenoidoperated cluthes C1-C5 is to provide six forward velocity ratios (1,2,3,4,5,6), reverse speed ratio (R) or neutral situation (N).

	C1	C2	C3	C4	C5
	C1	C2	C3	C4	C5	The 1st	×			×
The 2nd	×			×		The 1st	×			×
The 2nd	×			×		The 3rd	×		×
The 4th	×	×				The 3rd	×		×
The 4th	×	×				The 5th		×	×
The 6th		×		×		The 5th		×	×
The 6th		×		×		R			×	×
N					×	R			×	×

Table 1

For example, when interlock clutch C1 and C4, set up the second forward direction speed ratio.Gear shift from a forward direction speed ratio to another velocity rate is another clutch of interlock (that is (on-coming) on the horizon clutch) and obtaining by a clutch (that is (off-going) clutch that, is about to leave away) is separated usually.For example, the interlock C5 and speed changer is lowered to first grade from second grade by clutch C4 is separated.

[0022] control module 24 based on using TEL program of the present invention definite compensation torque (T _COMP) adjust the operation of Vehicular system 10.More specifically, before listing, Vehicular system 10 all passes through dynamic vehicle and detects (DVT).DVT is the functional check of vehicle performance and carries out on the roll detection machine.The DVT operation can include, but not limited to emission control, power operation, speed changer, brake, ABS/ traction control, touring control and final velocity ratio.During DVT, the operator treats to carry out each operation in vehicle and according to the preset detection progress.

[0023] the present invention merges to the TEL program among the DVT.More specifically, from based on high moment of torsion error (T _ERRHI) and low moment of torsion error (T _ERRLO) the multi-dimensional query table determine T _COMP, and the low moment of torsion error of high moment of torsion sum of errors is calculated based on the operational condition of monitoring during TEL.T _ERRHIAnd T _ERRLOBased on estimating engine moment of torsion (T _EST) and the Engine torque (T that measures _MEAS) and determine.

[0024] T _ESTCalculate by control module 24 calculating by using based on the moment of torsion estimation of engine operating condition.At the common title of transferring the possession of of authorizing on March 9th, 2004 is the U.S. Patent No. 6 of " Torque Estimator for EngineRPM and Torque Control (being used for the moment of torsion estimation of engine RPM and moment of torsion control) ", 704,638 disclose a kind of exemplary Engine torque estimation device, and its full content is incorporated into here by reference.T _MEASBe the torque capacity of in the torque converter pump, measuring, and determine according to following relation:

T _MEAS＝RPM ²×k ²

Wherein, k is based on the definite no unit quantity of torque converter velocity rate (that is turbine RPM ratio engine RPM).More specifically, k is the relative measurement value of torque converter tightness.The value of K is low more, and torque converter is tight more (that is, engine RPM is low more when torque converter stops) just.T _MEASAnd details also is disclosed in U.S. Patent No. 6,704, in 638.

[0025] the binding condition of TEL control also startup speed changer.More specifically, when speed changer 14 was in the D shelves, speed changer 14 carried out moment of torsion transmission (that is, forbidding the rotation of input shaft 40) to a plurality of clutch C1-C5 of interlock so that no thoroughfare.In this way, the turbine rotation is forbidden in the rotation of torque converter pump simultaneously.And under the situation of binding condition and apply the brakes, motor PRM is commanded to first or low grade (RPM _LO).When being in or quite near RPM _LOThe time, calculate the low Engine torque (T of estimation _ESTLO) and the low Engine torque (T that measures _MEASLO) a plurality of samples.Low moment of torsion error (T _ERRLO) as T _ESTLOMean value (that is the mean value of a plurality of samplings) and T _MEASLOMean value (that is the mean value of a plurality of samplings) between difference and determine.

[0026] motor PRM then is commanded to second or high grade (RPM _HI).When being in or quite near RPM _HIThe time, determine the high-engine moment of torsion (T that estimates _ESTHI) and the high-engine moment of torsion (T that measures _MEASHI) a plurality of samples.High moment of torsion error (T _ERRHI) as T _ESTHIMean value (that is the mean value of a plurality of samplings) and T _MEASHIMean value (that is the mean value of a plurality of samplings) between difference and determine.

[0027] based on T _ERRHIAnd T _ERRLODetermine T _COMPMore specifically, can provide the multi-dimensional query table also this table to be pre-programmed in the storage of control module 24.This question blank comprises corresponding to T _ERRHIX-axis and corresponding to T _ERRLOY-axis, and be calibrated according to motor, torque converter and speed changer standard.Be exemplary question blank in following table 2:

T _ERRLO\T _ERRHI

-60

-50

-40

-30

0

30

40

50

60

-60	20	15	10	0	0	0
-60	20	15	10	0	0	0	-50	15	15	10	0	0	0	0	0	0
-40	10	10	10	0	0	0	-50	15	15	10	0	0	0	0	0	0
-40	10	10	10	0	0	0	-30	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	-30	0	0	0	0	0	0	0	0	0
0	0	0	0	0	0	0	30	0	0	0	0	0	0	0	0	0
40	0	0	0	-10	-10	-10	30	0	0	0	0	0	0	0	0	0
40	0	0	0	-10	-10	-10	50	0	0	0	0	0	0	-10	-15	-15
60	0	0	0	-10	-15	-25	50	0	0	0	0	0	0	-10	-15	-15

Table 2

For example, if T _ERRHIEqual-50Nm and T _ERRLOEqual-40Nm T _COMPCan be set at and equal 10Nm.T _COMPBe stored in the storage, and during shifting of transmission based on T _COMPAdjust T _ESTMore specifically, based on T _COMPProofread and correct T _EST(that is T, _COMPIncrease or reduce T _EST) so that the estimating engine moment of torsion (T of correction to be provided _CORREST).Be clear that very much T _COMPOnly can partly proofread and correct at T _ESTIn error, with T _ESTPush more accurate value to.Based on T _CORRESTAnd the gear shift of adjustment speed changer 14.

[0028] can expect, during the early stage gear shift of speed changer, realize T _COMPThat is to say T _COMPBe preferred for the gear shift that in one period date at first in speed changer life-span, takes place.It is further contemplated that T is moved and adjusted gradually to the gear shift adaptation procedure simultaneously _ESTTo proofread and correct any error.The gear shift adaptation value is then used in the residual life time of speed changer.In this way, T _COMPAlong with being integrated in the past in the gear shift adaptation value of time.

[0029] with reference to figure 3, it has described the performed illustrative steps of TEL control of the present invention in detail.In step 300, control determines whether TEL is allowed to.If TEL is not allowed to, control circle is returned.If TEL has been allowed to, then in step 302, control determines that speed changer is whether at the D shelves with whether used brake.If speed changer is not in the D shelves or do not have brake applications, then control circle is returned.If speed changer is in the D shelves and used brake, then in step 304, control is ordered about a plurality of clutch C1-C5 so that the binding condition of speed changer to be provided.More specifically, three or more among the clutch C1-C5 can interlock to forbid that moment of torsion is by speed changer transmission (that is, forbidding the rotation of input shaft).

[0030] in step 306, the control command engine RPM is to low RPM shelves (RPM _LO) (for example, 1000RPM).In step 308, control is by determining that whether engine RPM is at lower low valve valve RPM _LO1Higher low valve valve RPM _LO2Between and determine that whether engine RPM is fully near RPM _LOIf RPM is not more than RPM _LO1And be not less than RPM _LO2, then control circle is returned.If RPM is greater than RPM _LO1And less than RPM _LO2, then in step 310, continue control.In step 310, T is collected in control _ESTLOAnd T _MEASLON sample.

[0031] in step 312, the control command engine RPM is to high RPM shelves (RPM _HI) (for example, 2500RPM).In step 314, control is by determining that whether engine RPM is at lower high threshold values RPM _HI1Higher high threshold values RPM _HI2Between and determine that whether engine RPM is fully near RPM _HIIf RPM is not more than RPM _HI1And be not less than RPM _HI2, then control circle is returned.If RPM is greater than RPM _HI1And less than RPM _HI2, then in step 316, continue control.In step 316, T is collected in control _ESTHIAnd T _MEASHI M sample.In step 318, the control command engine RPM is to idling RPM (RPM _IDLE).

[0032] in step 320, control determines whether TEL finishes.If TEL does not finish, then control circle is returned.If TEL has finished, then control based on T _ESTLOAnd T _MEASLON sample and T _ESTHIAnd T _MEASHIM sample calculation T _ERRHIAnd T _ERRLOIn step 324, control is based on T _ERRHIAnd T _ERRLODetermine T _COMPControl determines whether DVT finishes in step 326.If DVT does not finish, then control circle is returned.If DVT has finished, then be controlled in the step 328 and set the DVT sign and equal true (TRUE), and finishing control.

[0033] present, those skilled in the art can understand from aforesaid explanation, and wide in range instruction of the present invention can realize with various forms.Therefore, though the present invention is described in conjunction with specific embodiments, but scope of the present invention is not limited to this, because according to the study to accompanying drawing, specification and following claims, it is conspicuous that of the present invention other revised those skilled in the art.

Claims

1, a kind of method of adjusting by the gear shift of engine-driven speed changer comprises:

Calculate the first moment of torsion error;

Calculate the second moment of torsion error;

Determine compensation torque based on the described second moment of torsion error of the described first moment of torsion sum of errors; With

Adjust described gear shift based on described compensation torque.

2, method as claimed in claim 1, wherein, described compensation torque is determined from question blank based on the described second moment of torsion error of the described first moment of torsion sum of errors.

3, method as claimed in claim 1 also comprises:

Determine the estimating engine moment of torsion; With

Proofread and correct described estimating engine moment of torsion so that the estimating engine moment of torsion after the correction to be provided based on described compensation torque, the estimating engine moment of torsion of wherein said gear shift after based on described correction adjusted.

4, method as claimed in claim 1 also comprises:

Determine the first estimating engine moment of torsion at first engine speed; With

Determine that at described first engine speed first measures Engine torque, the wherein said first moment of torsion error is measured Engine torque based on the described first estimating engine moment of torsion and described first and is calculated.

5, method as claimed in claim 4 also comprises:

Determine the second estimating engine moment of torsion at second engine speed; With

Determine that at described second engine speed second measures Engine torque, the wherein said second moment of torsion error is measured Engine torque based on the described second estimating engine moment of torsion and described second and is calculated.

6, method as claimed in claim 1, a plurality of clutches that also comprise the described speed changer of interlock are to provide the binding condition of described speed changer, and the described second moment of torsion error of the wherein said first moment of torsion sum of errors is calculated based on the operational condition during described binding condition.

7, a kind of correction is used for adjusting the method by the estimation moment of torsion of the gear shift of engine-driven speed changer of vehicle, comprising:

Produce the binding condition of described speed changer;

Calculate the first moment of torsion error based on the operational condition during described binding condition;

Calculate the second moment of torsion error based on the operational condition during described binding condition;

Proofread and correct described estimating engine moment of torsion so that the estimating engine moment of torsion after the correction to be provided based on described compensation torque.

8, method as claimed in claim 7 also comprises based on the estimating engine moment of torsion after the described correction and adjusts described gear shift.

9, method as claimed in claim 7, wherein, described compensation torque is determined from question blank based on the described second moment of torsion error of the described first moment of torsion sum of errors.

10, method as claimed in claim 7 also comprises:

11, as the method for claim 10, also comprise:

12, method as claimed in claim 7, a plurality of clutches that also comprise the described speed changer of interlock are to provide the binding condition of described speed changer.

13, a kind ofly be used for proofreading and correct the method that is used to adjust by the estimation moment of torsion of the gear shift of engine-driven speed changer of vehicle, comprise:

Starting torque error learn (TEL) program during the dynamic vehicle of described vehicle detects (DVT);

Calculate the first moment of torsion error based on the operational condition during described TEL program;

Calculate the second moment of torsion error based on the operational condition during described TEL program;

Proofread and correct described estimating engine moment of torsion so that the estimating engine moment of torsion of correction to be provided based on described compensation torque.

14,, also comprise the binding condition that produces described speed changer as the method for claim 13; Wherein calculate the described first moment of torsion sum of errors, the second moment of torsion error based on the operational condition during described binding condition.

15, as the method for claim 13, also comprise:

Set the storage sign that the described DVT of expression finishes; With

Adjust described gear shift based on the estimating engine moment of torsion after the described correction.

16, as the method for claim 13, wherein, described compensation torque is determined from question blank based on the described second moment of torsion error of the described first moment of torsion sum of errors.

17, as the method for claim 13, also comprise:

18, as the method for claim 17, also comprise:

19, as the method for claim 13, a plurality of clutches that also comprise the described speed changer of interlock are to provide the binding condition of described speed changer.

20, a kind of control system of speed variator that is used for being adjusted at by the gear shift of engine-driven automatic transmission comprises:

Clutch is ordered about the gear shift that is used for carrying out gear in described speed changer; With

Control module, it calculates the first moment of torsion sum of errors, the second moment of torsion error during moment of torsion error learn program, determine compensation torque based on the described second moment of torsion error of the described first moment of torsion sum of errors, and adjusts gear shift based on described compensation torque.

21, as the control system of speed variator of claim 20, wherein, described compensation torque is determined from question blank based on the described second moment of torsion error of the described first moment of torsion sum of errors.

22, as the control system of speed variator of claim 20, wherein, described control module is determined the estimating engine moment of torsion and is proofreaied and correct described estimating engine moment of torsion so that the estimating engine moment of torsion after the correction to be provided based on described compensation torque, wherein adjusts described gear shift based on the estimating engine moment of torsion after the described correction.

23, as the control system of speed variator of claim 20, wherein, described control module is determined the first estimating engine moment of torsion at first engine speed, and determine that at described first engine speed first measures Engine torque, the wherein said first moment of torsion error is measured Engine torque based on the described first estimating engine moment of torsion and described first and is calculated.

24, as the control system of speed variator of claim 23, wherein, described control module is determined the second estimating engine moment of torsion at second engine speed, and determine that at described second engine speed second measures Engine torque, the wherein said second moment of torsion error is measured Engine torque based on the described second estimating engine moment of torsion and described second and is calculated.

25, as the control system of speed variator of claim 20, wherein, described control module is ordered about a plurality of clutches of described speed changer so that the binding condition of described speed changer to be provided, and the described second moment of torsion error of the wherein said first moment of torsion sum of errors is calculated based on the operational condition during described binding condition.