CN1904333B - Device and method for preventing over-rotation of engines - Google Patents
Device and method for preventing over-rotation of engines Download PDFInfo
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- CN1904333B CN1904333B CN 200610099470 CN200610099470A CN1904333B CN 1904333 B CN1904333 B CN 1904333B CN 200610099470 CN200610099470 CN 200610099470 CN 200610099470 A CN200610099470 A CN 200610099470A CN 1904333 B CN1904333 B CN 1904333B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
A device and method that suppresses delay in response to gear-shifting in upshifting during control for preventing over-rotation. An engine torque control part controls the torque of the engine based on a driver request (APO) for driving force, a rotation velocity sensor detects the rotation velocity of the engine, and an over-rotation preventing part suppresses the controlled torque based on the velocity and prevents over-rotation of the engine. An over-rotation prevention releasing part releases suppression of the torque based on the rotation velocity lowered due to upshifting of the automatic transmission, and an engine torque increasing rate regulating part regulates the increasing rate of the torque when said suppression of the torque is released and the torque is increased. Thus, a sudden increase in engine torque is avoided.
Description
The cross reference of related application
The application requires the preference of Japanese patent application No.2003-038426 (applying date is on July 26th, 2005), and its full content is incorporated this paper into as a reference.
Technical field
The present invention relates to a kind of anti-locking apparatus of excess revolutions that prevents engine overrun.
Background technique
Because if the upper limit rotating speed that motor surpass to allow is rotated, then can produces degradation problem under the durability of motor, thereby, propose for example special technology of opening record in 2004-245191 number in the past as the technology that prevents this problem.
Owing to controlling by the switch of fuel supply under the situation that prevents engine overrun, the deterioration that can bring bad influence or produce cornering ability to the catalyzer of engine exhaust system, thereby this technology replaces said method, reduce by the aperture that makes the throttle valve of controlling air input of engine by air, prevent engine overrun.
Summary of the invention
Prevent the technology of engine overrun according to the aperture of passing through to reduce throttle valve of record in patent documentation 1, when this prevents that automatic transmission upgrades in the control of excess revolutions, produce the problem that the following describes.
Under the situation of driving at driver's depress throttle pedal, so that the moment of torsion of motor and the identical mode of APO (driver requested) moment of torsion corresponding to this depression amount (accelerator opening APO), target setting Engine torque tTe.If engine speed Ne rises, prevents that the control of engine overrun from beginning that then target engine torque tTe is suppressed.That is, target engine torque tTe is set to and is lower than APO correspondence (driver requested) moment of torsion.
If in this control that prevents engine overrun, automatic transmission is accepted the instruction that upgrades from gear GP=n speed to GP=n+1 speed, then when this speed change, should press Po to descend from the joint of the d/d release side friction key element of jointing state (clutch or break).Meanwhile, when this speed change, should press Pc to rise, to carry out speed change corresponding to the instruction that upgrades from the joint of the engaged engage side friction key elements of releasing state (clutch or break).
Utilize this carrying out that upgrades, the rotational speed N e of motor descends, and prevents that thus the control of engine overrun is disengaged.Therefore, because of the repressed target engine torque tTe of this control restores to APO correspondence (driver requested) moment of torsion, in order to realize this recovery, the aperture of throttle valve is restored to the aperture corresponding to accelerator opening APO.
But the recovery of repressed target engine torque tTe is sharply carried out in order to prevent excess revolutions, and the joint of the engage side friction key element that domination upgrades is pressed the rising of Pc, and is a lot of with respect to the restitution delay of target engine torque tTe.
Therefore, utilize to engage press the rising of Pc and the engage side friction key element that engages is exceedingly slided, produce so-called unexpected idle running (flare).Need the long period owing to idle running suddenly disappears, thereby the speed change time till the end of the speed change of the gear ratio after effective gear ratio of representing with the rotating ratio of input shaft and output shaft reaches speed change is elongated, produces the operating lag of speed change.
The objective of the invention is to, propose a kind of anti-locking apparatus of engine overrun that can suppress the speed change operating lag.
In order to realize this purpose, the anti-locking apparatus of engine overrun of engine overrun that prevents of the present invention comprises as lower member: the Engine torque control device, and it controls the moment of torsion of described motor according to driver's driving force requirement; Speed probe, it detects the rotating speed of described motor; Excess revolutions prevents portion, and it suppresses the described moment of torsion by described Engine torque control device control according to the rotating speed of detected described motor, prevents described engine overrun; Excess revolutions prevents releasing portion, and it is removed described excess revolutions and prevent the inhibition of portion to moment of torsion according to the rotating speed of the described motor that descends because of upgrading of automatic transmission; And Engine torque increases limitation part, and it is preventing that according to described excess revolutions the inhibition that releasing portion removes described moment of torsion from increasing under the situation of moment of torsion, limits pushing the speed of described moment of torsion.
According to the anti-locking apparatus of engine overrun involved in the present invention, in the control that prevents engine overrun, descend at rotating speed because of the motor that upgrades of automatic transmission, prevent to suppress pushing the speed of Engine torque under the situation that the control of excess revolutions is disengaged.Therefore, can relax the moment of torsion of motor and push the speed, the rising that the joint of the engage side friction key element that upgrades with respect to domination is pressed and become rapid.That is, the rising that the joint of mitigation engage side friction key element is pressed can alleviate unexpected idle running with respect to the delay of pushing the speed of Engine torque.
Therefore, can avoid the speed change time (time till the gear ratio after effective gear ratio of representing with the rotating ratio of input shaft and output shaft reaches speed change) elongated, prevent the operating lag of speed change.
Description of drawings
Fig. 1 is the vehicle power driving system that will have as the control gear that prevents engine overrun of one embodiment of the present of invention, the system diagram of representing with its control system.
Fig. 2 is the flow chart of the control program of the engine controller of expression in this power transmission control system when asking for joint that engine overrun prevents the target engine torque of usefulness and engage side friction key element and pressing.
Fig. 3 is the action timing diagram when carrying out control program shown in Figure 2.
Fig. 4 is expression timing diagram another embodiment of the present invention, identical with Fig. 3.
Fig. 5 is expression timing diagram another embodiment of the present invention, identical with Fig. 4.
Fig. 6 is expression timing diagram another embodiment of the present invention, identical with Fig. 4.
Embodiment
Below, the embodiment shown in is described in detail embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 shows to have as the Power Train of the vehicle of the anti-locking apparatus of the engine overrun of one embodiment of the present of invention its control system of unifying, and constitutes this power transmission system by motor 1 and automatic transmission 2.
In addition, the control that utilizes engine controller 6 (for example, the control of the moment of torsion of motor, prevent the control of excess revolutions, control that the moment of torsion of control that the control that prevents excess revolutions is removed, limiting engine is pushed the speed etc.), be not only to be undertaken by the aperture of throttle valve actuator 5 control throttle valve, though it is not shown, but in addition, also can control by oil-break, the valve lift amount control of time of ignition control, air inlet and exhaust valve etc. carried out.
Automatic transmission 2 is known step type automatic transmission.Automatic transmission 2 is utilized the unlatching of inserting the gear shift solenoid valve 8～10 in the control valve body 7, the combination of closing, and selects corresponding gear, utilizes the gear ratio of selecting gear corresponding to this, speed change is carried out in the rotation of motor 1, to the driving wheel transmission of vehicle.
The unlatching of gear shift solenoid valve 8～10, closing control utilize gearbox controller 11 to carry out as described below.
That is, gearbox controller 11 has not shown joint pressure-controlled and engages the pressure configuration part.In addition, gearbox controller 11 input is from the selection shelves signal of shift level 12, this shift level 12 corresponding to the desirable Parking of driver (P) shelves, some operation the in (R) shelves, empty (N) shelves, automatic speed changing (D) shelves, engine brake (L) shelves, hand gear (M) shelves (manual shift mode) of travelling of falling back.
At this moment, if select to make automatic transmission 2 to be in the shelves of state that can not transferring power, then by closing whole gear shift solenoid valves 8～10, make automatic transmission 2 be in neutral state, if and selection makes automatic transmission 2 be in the shelves of the state of transferring power, then gear shift solenoid valve 8～10 opens, cuts out, so that automatic transmission 2 becomes corresponding to the drive state of selecting shelves.
Below, the action to automatic speed changing (D) shelves and hand gear (M) shelves (manual shift mode) involved in the present invention when selected roughly describes.
Under the former selecteed situation of automatic speed changing (D) shelves, gearbox controller 11 is according to the travelling state (vehicle velocity V SP described later or accelerator opening APO etc.) of vehicle, based on predetermined speed change corresponding diagram, determine best gear, gear shift solenoid valve 8～10 opens, cuts out switching, to carry out speed change to best gear from current selection gear.
Under hand gear (M) shelves (manual shift mode) selecteed situation of the latter, gearbox controller 11 utilizes the instruction that manually upgrades that shift level 12 carries out in existence, manually in the downshift command, gear shift solenoid valve 8～10 opens, cuts out switching, to carry out speed change to the gear of a high retaining side or a low retaining side from current gear, and before manually upgrade instruction or the manual downshift command sent next time, make gear shift solenoid valve 8～10 keep current unlatching, closed condition, keep the gear after the switching.
Therefore, to engine controller 6 and gearbox controller 11, except as common input information, import above-mentioned selection shelves signal from shift level 12, manually upgrade instruction and manually outside the downshift command, also input: from the signal of the accel sensor 13 of depression amount (accelerator opening) APO that detects accelerator pedal 4, signal from the input turn-sensitive device 14 of the input speed Ni that detects automatic transmission 2, signal from the engine rotation sensor 15 of detection of engine rotational speed N e, signal from the output turn-sensitive device 16 of the output speed No that detects automatic transmission 2, signal from the vehicle speed sensor 17 that detects speed of a motor vehicle VSP, and from the signal of the throttle valve opening sensor 18 of the throttle valve opening TVO that detects throttle valve 3.
In addition, when this speed change, the joint pressure-controlled portion of gearbox controller 11 also has following function, that is, by gear shift solenoid valve 8～10, the joint of control engage side friction key element and release side friction key element is pressed.
In order to realize purpose of the present invention, engine controller 6 is carried out control program shown in Figure 2, determines target throttle valve opening tTVO, realizes the control that prevents engine overrun as purpose of the present invention.
In step S1, check and select whether shelves are hand gear shelves (manual shift mode) in step S2, check the control that whether is preventing engine overrun, whether in step S3, checking has the instruction of manually upgrading.
In step S1, be judged to be to be judged to be when not being in the state of a control that prevents excess revolutions when not being hand gear shelves (manual shift mode) or in step S2 or in step S3, to be judged to be and manually do not upgrade when instructing, owing to do not produce problem to be solved by this invention, need be in order not address this problem the control program of execution graph 2, thereby direct finishing control.
But, in step S1, be judged to be and be hand gear shelves (manual shift mode) and in step S2, be judged to be and be in the state of a control that prevents engine overrun and in step S3, be judged to be when instruction of manually upgrading, owing to produce problem to be solved by this invention, thereby will to control in order addressing this problem to step S4～step S9 and to advance the control that prevents engine overrun after manually upgrading as described below.
In step S4, among the CLV ceiling limit value Δ TeLMT in the two-dimentional corresponding diagram that is stored in effective gear ratio i=Ni/No that represents with speed changer input output rotating ratio and the speed change kind that upgrades (1 → 2,2 → 3,3 → 4 etc.) in advance, that Engine torque is pushed the speed relevant when preventing the control of excess revolutions with the releasing of each these combination, read in corresponding to the effective value of the combination of the gear ratio i and the speed change kind that upgrades.
In step S5, read in desired in the control of judging among the step S2 that prevents engine overrun, prevent engine overrun control want demanded engine torque TeOVRLMT.
The control that prevents engine overrun of in step S5, reading in want demanded engine torque TeOVRLMT, from the result of determination of step S1～step S3 as can be known, describe according to Fig. 3, be equivalent to following moment of torsion tTe, promptly, instant t 1 begins to prevent the control of engine overrun, send the instruction that manually upgrades at instant t 2, echo the beginning that upgrades with it mutually, descend and remove the control that prevents excess revolutions, the target engine torque tTe from the increase of this instant t 3 ' beginning is restored at instant t 3 ' engine speed Ne.
In step S6, to the pace of change of wanting demanded engine torque TeOVRLMT of the control that prevents engine overrun of reading in step S5, promptly prevent that in the releasing of Fig. 3 the d/dt that pushes the speed (TeOVRLMT) of instant t 3 ' Engine torque afterwards of the control of excess revolutions from carrying out computing, TeLMT is fast to check the CLV ceiling limit value Δ of pushing the speed of the Engine torque when whether it prevent the control of excess revolutions than the releasing of reading in step S4.
If it is unhappy, then in step S7, that utilizes the control that prevents engine overrun that the upper limit speed configuration part will read in step S5 wants demanded engine torque TeOVRLMT, want demanded engine torque TeOVRLMT when directly preventing the control of excess revolutions as releasing, and the releasing that will determine like this wants demanded engine torque TeOVRLMT when preventing the control of excess revolutions, prevents instant t 3 ' the target engine torque tTe afterwards of the control of excess revolutions as the releasing of Fig. 3.
In step S6, be judged to be, the releasing of Fig. 3 prevents the d/dt that pushes the speed (TeOVRLMT) of instant t 3 ' Engine torque afterwards of the control of excess revolutions, under the fast situation of the CLV ceiling limit value Δ TeLMT that pushes the speed of the Engine torque when preventing the control of excess revolutions than releasing, in step S8, the demanded engine torque TeOVRHLMT that wants when confined releasing is prevented the control of excess revolutions carries out computing, and be set and want demanded engine torque TeOVRLMT when preventing the control of excess revolutions for releasing, above-mentioned restriction is meant that the d/dt that pushes the speed (TeOVRLMT) of Engine torque is restricted to the CLV ceiling limit value Δ TeLMT that pushes the speed of the Engine torque when removing the control that prevents excess revolutions.
In addition, want demanded engine torque TeOVRLMT=TeOVRHLMT when making the releasing of determining like this prevent the control of excess revolutions, prevent instant t 3 ' the target engine torque tTe afterwards of the control of excess revolutions as the releasing of Fig. 3.
In step S9, engage to press the configuration part releasing of Fig. 3 to be prevented the joint of instant t 3 ' engage side friction key element afterwards of the control of excess revolutions from pressing Pc, proofread and correct the value when removing the control that prevents excess revolutions, perhaps, be replaced into the value of reading the special-purpose corresponding diagram when releasing prevents the control of excess revolutions.
When these corrections or displacement, make the joint of instant t 3 ' the engage side friction key element afterwards of removing the control that prevents excess revolutions press Pc, corresponding to Engine torque Te, throttle valve opening TVO and accelerator opening APO, for example as the releasing of Fig. 3 prevents that the instant t 3 ' of the control of excess revolutions from representing with solid line afterwards, make this joint press Pc than the ratio height shown in the dotted line with respect to common Engine torque.
According to the above-mentioned control that prevents excess revolutions of step S4～step S9, continuing to carry out should finishing control to being judged to be in step S10.
Here, judgment mode that whether should finishing control is, the effective gear ratio that can represent at the rotating ratio Ni/No with the input shaft of speed changer and output shaft for example becomes after the speed change of gear ratio finishes after the speed change, when having passed through the rich time, being judged as should finishing control.
According to above-mentioned present embodiment, as shown in Figure 3, owing in the control that prevents engine overrun, manually upgrade (instant t 2), for the decline of the engine speed Ne that will follow it and remove the control that prevents excess revolutions, the target engine torque tTe's of (instant t 3 ' afterwards) pushed the speed when the aperture of throttle valve increased recovery, in step S6 and step S8, the CLV ceiling limit value Δ TeLMT that pushes the speed that is restricted to the Engine torque when removing the control that prevents excess revolutions suppresses, make instant t 3 ' the target engine torque tTe afterwards that removes the control that prevents excess revolutions, want demanded engine torque TeOVRHLMT when preventing the control of excess revolutions for the releasing after the restriction, thereby, can relax the increase that aperture by the throttle valve that echoes mutually with the releasing of the control that prevents excess revolutions increases the Engine torque that restores and cause restores, press the rapid change of the rising of Pc with respect to the joint of arranging the engage side friction key element that manually upgrades, and, can relax the joint of engage side friction key element and press the delay of the rising of Pc with respect to the increase recovery of Engine torque, alleviate engine speed Ne be accompanied by as dotted line illustrated unsettled as described in unexpected idle running, make engine speed Ne shown in real diagram shows, become level and smooth.
Therefore, as shown in Figure 3, releasing prevents the instant t 3 ' of the control of excess revolutions, it is morning to prevent that than existing releasing the instant t 3 of the control of excess revolutions from arriving, simultaneously the effective gear ratio i that represents with the rotating ratio Ni/No of input shaft and output shaft reaches the instant t 4 ' that the speed change of the gear ratio after the speed change finishes, it is morning that the instant t 4 that finishes than existing speed change arrives, and can avoid preventing that the speed change time that manually upgrades in the control of excess revolutions is elongated, to suppress the operating lag of speed change.
In addition, owing to identical reason, the joint of engage side friction key element presses Pc can not produce sudden change, the variation in time shown in the dotted line of vehicle acceleration G generation Fig. 3 owing to this sudden change in the past, producing the sudden change speed change that manually upgrades impacts, but engage to press Pc not produce sudden change by making, vehicle acceleration G is as changing in time representing with solid line among Fig. 3, and the sudden change speed change that can suppress manually to upgrade is impacted.
And, in the step S9 of Fig. 2, as pressing shown in the Pc at the joint of the instant t 3 ' of representing to remove the control that prevents excess revolutions with solid line among Fig. 3 engage side friction key element afterwards, make the control of not carrying out preventing excess revolutions during common the time engage and press Pc to uprise with respect to the ratio of Engine torque, because press the Pc height than the illustrated existing joint of with dashed lines, thereby can improve the speed change response according to following reason.
Promptly, because Engine torque is low during preventing excess revolutions, thereby after the instant t 2 that indication just manually upgrades, engage side friction key element is to press Pc to engage corresponding to the low joint of this low Engine torque, therefore, from indicating the instant t 2 that manually upgrades, elongated tendency is arranged to the time (time in moment of torsion stage) that causes the instant t 3 ' that engine speed Ne descends by manually upgrading.Relative therewith, in the present embodiment, make as described above to engage height when pressing Pc common with respect to the ratio of Engine torque, can carry out the joint of engage side friction key element rapidly, to shorten the time in moment of torsion stage.
In addition, the instant t 3 ' that prevents excess revolutions control in releasing afterwards, pushing the speed of target engine torque tTe is suppressed.Therefore, definite joint presses the increase of Pc also to be suppressed corresponding to Engine torque, cause the instant t 3 ' that engine speed Ne descends from utilizing the carrying out that manually upgrades, there is elongated tendency the time (inertia phase time) that finishes instant t 4 ' to speed change.But, under making situation high when engage pressing Pc common as mentioned above, can promptly carry out the joint of engage side friction key element with respect to the ratio of Engine torque, shorten the inertia phase time.
As mentioned above, the instant t 3 ' that is disengaged in the control that prevents excess revolutions makes to engage under the situation high when pressing Pc common with respect to the ratio of Engine torque afterwards, can shorten time in moment of torsion stage and inertia phase time simultaneously.That is to say, if prevent in releasing excess revolutions control instant t 3 ' afterwards, suppress pushing the speed of target engine torque tTe, then because joint presses Pc to determine corresponding to Engine torque, thereby the tendency of step-down is arranged, but in the present embodiment, owing to engage height when pressing Pc common with respect to the ratio of Engine torque, so speed change sound would not descend, and can make its raising.
And, can make in the step S4 of Fig. 2 the CLV ceiling limit value Δ TeLMT that pushes the speed of the Engine torque of determining, when effective gear ratio i that the rotating ratio Ni/No with the input shaft of speed changer and output shaft represents becomes the regulation gear ratio before with different afterwards.In other words, in the front and back that the speed change of utilizing automatic transmission is finished, the CLV ceiling limit value of pushing the speed Δ TeLMT difference.
In this case, with above-mentioned regulation gear ratio as the speed change after manually upgrading after gear ratio, as shown in Figure 4, when actual speed change finishes t4 ' before and afterwards, make the CLV ceiling limit value Δ TeLMT difference of pushing the speed of Engine torque, the CLV ceiling limit value of pushing the speed of t4 ' Engine torque afterwards when actual speed change is finished, as Δ TeLMT=Δ TeLMT (L), t4 ' Engine torque is before pushed the speed CLV ceiling limit value Δ TeLMT=Δ TeLMT (S) greatly when finishing than actual speed change.
Under the situation of the CLV ceiling limit value Δ TeLMT that pushes the speed that determines Engine torque like this, because t4 when actual speed change finishes " Engine torque of (in the speed change) the CLV ceiling limit value Δ TeLMT=Δ TeLMT (S) that pushes the speed before; be defined as just in time being suitable for realizing the pushing the speed of Engine torque of above-mentioned action effect of the present invention; in addition; the CLV ceiling limit value Δ TeLMT=Δ TeLMT (L) that pushes the speed of t4 ' Engine torque afterwards when finishing; be confirmed as early as possible finishing control and reach the speed that control finishes instant t 5 '; thus with the irrelevant actual speed change of this action effect, in the time of the action effect of the present invention stated in realization, can finish to prevent the control of excess revolutions as early as possible, to avoid unnecessarily spinning out control.
And, can make in the step S4 of Fig. 2 the CLV ceiling limit value Δ TeLMT that pushes the speed of the Engine torque of determining, when effective gear ratio i that the rotating ratio Ni/No with the input shaft of speed changer and output shaft represents becomes the different setting gear ratio of the speed change kind that manually upgrades because of each before with different afterwards.That is, the gear ratio after can finishing corresponding to the speed change of automatic transmission is set the CLV ceiling limit value Δ TeLMT that pushes the speed.
In this case, make above-mentioned regulation gear ratio for more approach the gear ratio of gear ratio before the speed change than gear ratio after the speed change after manually upgrading, as shown in Figure 5, effective gear ratio i become the instant t 4 ' of this settings gear ratio before (speed change in earlier stage) and (speed change later stage) afterwards, the CLV ceiling limit value Δ TeLMT difference of pushing the speed of Engine torque, can with the Engine torque in speed change early stage push the speed CLV ceiling limit value as Δ TeLMT=Δ TeLMT (L), push the speed CLV ceiling limit value Δ TeLMT=Δ TeLMT (S) greatly than the Engine torque in speed change later stage.
Under the situation of the CLV ceiling limit value Δ TeLMT that pushes the speed that determines Engine torque like this, can make from instant t 3 ' to begin to finish target engine torque tTe the inertia phase of instant t 4 ' to the speed change that effective gear ratio i becomes gear ratio after the speed change, beguine is big according to the illustrated target engine torque of embodiment's shown in Figure 4 dotted line.
Thus, in the present embodiment, can make vehicle acceleration G than the illustrated height of embodiment's shown in Figure 4 dotted line, in the embodiment shown in fig. 4, vehicle acceleration G such as dotted line illustrate, and at first stabilize to acceleration after the speed change after the depression and discontinuous, but in the present embodiment, vehicle acceleration G stabilizes to acceleration after the speed change in the mode that does not have depression, can obtain the sense of continuity of acceleration.
In addition, in the step S9 of Fig. 2, as illustrated in fig. 3, implement following method, promptly, height when making the instant t 3 ' joint afterwards of removing the control prevent excess revolutions press Pc common with respect to the ratio of Engine torque, to improve the speed change response, but in practice, be releasing prevent the instant t 3 ' of the control of excess revolutions make afterwards engage to press Pc when common high in, as among the step S9 of Fig. 2 as input signal illustrate, will be as determining that this engages the Engine torque Te of the controlling elements of pressing Pc, throttle valve opening TVO, accelerator opening APO changes similarly, thereby realizes engaging the rising of pressing Pc.
Here, at length describe according to Fig. 6, Fig. 6 changes Engine torque similarly and realizes engaging sequential chart under the situation of the rising of pressing Pc.
Fig. 6 is under the situation of the control that prevents engine overrun shown in Figure 4, make the joint of representing with solid line in the figure press the ratio of Pc with respect to Engine torque, in the time of higher than the general value that dots, change Engine torque similarly and sequential chart when realizing that this joint is pressed the rising of Pc.
Determining to engage the Engine torque Teo that uses in the pressure Pc, in the control that prevents excess revolutions, represent with common dotted line, but after the instant t 2 that indication manually upgrades, make to engage and press the Engine torque Teo that determines usefulness, as representing with solid line, rise to the specified value when removing the control that prevents excess revolutions similarly, after itself and the illustrated joint of dotted line determined in common mode are pressed consistent instantaneous of the Engine torque Teo that determines usefulness, with the Engine torque Teo that engage to press the determines usefulness specified value when releasing prevents the control of excess revolutions, switch to value than its high common usefulness.
Pressing the similar Engine torque Teo that determines usefulness with the joint of determining like this serves as that the desired value of pressing Pc is determined to engage in the basis, by so that the mode of engage pressing Pc to become this desired value control, shown in the solid line of Fig. 6, can make to engage and press Pc with respect to the illustrated general value height of the ratio dotted line of Engine torque.
In addition, in the above-described embodiments, in the control that prevents engine overrun, remain constant mode with rotating speed with motor, the situation of the target torque of feedback control on engine describes, but engine overrun of the present invention is prevented locking apparatus, and the rotating speed that also can replace motor remains constant situation, is applicable to following situation, promptly, under the situation of rotating speed more than or equal to specified value of motor, suppress the target torque of motor, the rotating speed of motor is reduced.In addition, the foregoing description makes excess revolutions prevent that the situation of device action from describing in the manual mode of automatic transmission, but the anti-locking apparatus of engine overrun of the present invention also goes for automatic shift mode.In addition, the foregoing description uses has a grade automatic transmission to describe, but the anti-locking apparatus of engine overrun of the present invention also goes for CVT (continuously variable transmission) (CVT etc.).
Claims (6)
1. the anti-locking apparatus of an engine overrun, the excess revolutions that it prevents the motor that driving wheel driven by automatic transmission is characterized in that, comprises as the bottom:
The Engine torque control device, it controls the moment of torsion of described motor according to driver requested moment of torsion;
Speed probe, it detects the rotating speed of described motor;
Excess revolutions prevents portion, and it suppresses the described moment of torsion by described Engine torque control device control, to prevent described engine overrun according to the rotating speed of detected described motor;
Excess revolutions prevents releasing portion, and its rotating speed at described motor is lower than under the situation of specified value, removes described excess revolutions and prevents the inhibition of portion to moment of torsion; And
The Engine torque limitation part of pushing the speed, it utilizes described excess revolutions to prevent that releasing portion from removing the inhibition of described moment of torsion and increase under the situation of moment of torsion, limits pushing the speed of described moment of torsion in the speed change of being undertaken by described automatic transmission.
2. engine overrun according to claim 1 is prevented locking apparatus, it is characterized in that,
The described Engine torque limitation part of pushing the speed before the speed change of being undertaken by described automatic transmission is finished and afterwards, makes the inhibition degree difference of described moment of torsion.
3. engine overrun according to claim 1 is prevented locking apparatus, it is characterized in that,
The described Engine torque limitation part of pushing the speed, the gear ratio after finishing corresponding to the speed change of being undertaken by described automatic transmission makes the inhibition degree difference of described moment of torsion.
4. engine overrun according to claim 1 is prevented locking apparatus, it is characterized in that,
Described automatic transmission comprises:
The friction key element that is used for speed change;
Engage pressure-controlled portion, it utilizes to engage and presses, and the jointing state and the releasing state of described friction key element are controlled; And
Engage and press the configuration part, it is set to engage and presses according to the moment of torsion of described motor,
Described joint press the configuration part will utilize the excess revolutions portion of preventing suppress moment of torsion during and the joint that utilizes Engine torque to push the speed during the pushing the speed of limitation part torque limiting press, be set at height when not suppressing moment of torsion.
5. engine overrun according to claim 4 is prevented locking apparatus, it is characterized in that,
Described joint is pressed the configuration part, increases moment of torsion after the correction according to the moment of torsion to the described motor that suppressed by the described excess revolutions portion of preventing, sets to engage and presses.
6. an engine overrun prevents method, and the excess revolutions that it prevents the motor that driving wheel driven by automatic transmission is characterized in that, comprises the steps:
According to driver's driving force requirement, control the moment of torsion of described motor;
Detect the rotating speed of described motor;
According to the rotating speed of detected described motor, suppress described moment of torsion;
Rotating speed at described motor is lower than under the situation of specified value, removes the inhibition of described moment of torsion; And
In the speed change of being undertaken by described automatic transmission, remove the inhibition of described moment of torsion and increase under the situation of moment of torsion, limit pushing the speed of described moment of torsion.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005-215679 | 2005-07-26 | ||
| JP2005215679 | 2005-07-26 | ||
| JP2005215679 | 2005-07-26 |
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| Publication Number | Publication Date |
|---|---|
| CN1904333A CN1904333A (en) | 2007-01-31 |
| CN1904333B true CN1904333B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200610099470 Active CN1904333B (en) | 2005-07-26 | 2006-07-24 | Device and method for preventing over-rotation of engines |
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| KR (2) | KR100881255B1 (en) |
| CN (1) | CN1904333B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102224046B (en) * | 2008-11-21 | 2014-11-12 | 沃尔沃建筑设备公司 | Pedal map shift |
| JP5191978B2 (en) * | 2009-11-18 | 2013-05-08 | ジヤトコ株式会社 | Control device for automatic transmission |
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| EP1413724A3 (en) * | 2002-10-25 | 2005-08-03 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine control during gear shift |
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2006
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- 2006-07-25 KR KR1020060069615A patent/KR100881255B1/en active IP Right Grant
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| GB2151727A (en) * | 1983-12-21 | 1985-07-24 | Nissan Motor | Method for alleviating transmission shift shocks |
| DE19963678A1 (en) * | 1998-12-31 | 2000-08-03 | Dana Corp Toledo Ohio | Operation control for multiple speed axle assembly of automatic drive train in motor vehicle, involves shifting multiple speed axle assembly at set reduction gear ratio when engine torque is low |
| EP1413724A3 (en) * | 2002-10-25 | 2005-08-03 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine control during gear shift |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100849568B1 (en) | 2008-07-31 |
| CN1904333A (en) | 2007-01-31 |
| KR20070014044A (en) | 2007-01-31 |
| KR100881255B1 (en) | 2009-02-05 |
| KR20080003743A (en) | 2008-01-08 |
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