CN102050109B - System and method for detecting and responding to the pressure loss in hydraulic automatic transmission - Google Patents
System and method for detecting and responding to the pressure loss in hydraulic automatic transmission Download PDFInfo
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- CN102050109B CN102050109B CN201010546278.0A CN201010546278A CN102050109B CN 102050109 B CN102050109 B CN 102050109B CN 201010546278 A CN201010546278 A CN 201010546278A CN 102050109 B CN102050109 B CN 102050109B
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Abstract
The invention relates to a system and method for detecting and responding to the pressure loss in a hydraulic automatic transmission. Specifically speaking, the control system of a hydraulic automatic transmission is provided and comprises a fault detection module and a transmission diagnostic module. The fault detection module detects the fault in the transmission components. The fault can indicate the low hydraulic fluid pressure or the failure of one or multiple components in the transmission. Based on the detected fault, the predetermined amount of fault and a plurality of conditions, the transmission diagnostic module determines whether the fault is caused by low hydraulic pressure.
Description
The cross reference of related application
The application requires in the rights and interests of the U.S. Provisional Patent Application 61/259,792 of submission on November 10th, 2009.Whole disclosures of above-mentioned patent application are incorporated to herein by reference at this.
Technical field
The present invention relates to explosive motor, more particularly, relate to and a kind ofly for detection of the pressure loss in hydraulic automatic transmission and to it, make the system and method for response.
Background technique
Background technique explanation provided in this article is for presenting on the whole the object of background of the present invention.Inventor's a part is operated in background technique part and is described, this part content and when submit applications, in this description, separately do not form prior art aspect, both indefinitely impliedly do not admitted to be to destroy prior art of the present invention yet.
Air/fuel in explosive motor combustion cylinder (A/F) mixture is with driven plunger.Piston makes crankshaft rotating and rotates, thereby produces driving torque.Driving torque can be passed to via speed changer the power train (for example, wheel) of vehicle.Driving torque also can transform (that is, being doubled) by a velocity ratio in a plurality of velocity ratios of speed changer.Speed changer can for example, couple via torque-converters (, fluid coupling) and bent axle.
Speed changer can comprise valve (for example, spring-opposed valve), clutch and one or more planetary gear set.Speed changer also can comprise check ball and/or servomechanism.Servomechanism can activate one or more clutches, and clutch can engage with the one or more gears in planetary gear set.Speed changer comprises the hydraulic fluid of one or more parts of controlling speed changer.The hydraulic fluid conventionally main pump in torque-converters offers speed changer.
Hydraulic fluid relies on the pressure of hydraulic fluid and flows through one or more valves (spring-opposed valve for example, with different spring rates).Alternatively, valve can be activated by the electromechanical coupling system of controlling by peripheral control unit.Hydraulic fluid is actuatable servomechanism also, to engage with one or more clutches.In addition, each clutch can be corresponding with the gear in planetary gear set.Therefore, hydraulic fluid can engage the one or more gears (by the combination of servomechanism and clutch) in planetary gear set, to obtain the velocity ratio of expectation.
Summary of the invention
For a control system for hydraulic automatic transmission, it comprises fault detection module and speed changer diagnostic module.Fault detection module detects the fault of transmission components, and wherein fault can be indicated low hydraulic fluid pressure in speed changer or the inefficacy of one or more parts.Speed changer diagnostic module determines according to the predetermined quantity of detected fault, fault and a plurality of condition (or situation) whether fault is because low hydraulic pressure causes.
For controlling a method for hydraulic automatic transmission, it comprises: detect the fault of transmission components, wherein fault can be indicated low hydraulic fluid pressure in speed changer or the inefficacy of one or more parts; And, according to the predetermined quantity of detected fault, fault and a plurality of condition, determine whether fault is because low hydraulic pressure causes.
In other features, above-mentioned system and method is that the computer program by being carried out by one or more processors is implemented.Computer program may reside in tangible computer-readable media, such as but not limited to storage, non-volatile data memory and/or other suitable tangible storage mediums.
The present invention also provides following scheme:
1. 1 kinds of control system for hydraulic automatic transmission of scheme, comprising:
Fault detection module, it detects the fault of the parts of described speed changer, and wherein, described fault can be indicated low hydraulic fluid pressure in described speed changer or the inefficacy of the one or more parts in described parts; And
Speed changer diagnostic module, its according to described in the fault, predetermined quantity and a plurality of condition of fault that detect determine whether described fault is because low hydraulic pressure causes.
The control system of scheme 2. as described in scheme 1, is characterized in that, described parts comprise valve, reverse gear pressure switch, throttle position sensor, engine speed sensor, transmission output shaft velocity transducer and turbo speed sensor.
The control system of scheme 3. as described in scheme 2, it is characterized in that, described fault detection module detects the fault of described valve according to the response of the integrity of described valve and described valve, wherein, the integrity of described valve is through the pressure drop of described valve while closing based on described valve, and wherein, the response of described valve is based on the described valve of order and activates the delay between described valve.
The control system of scheme 4. as described in scheme 2, it is characterized in that, described faut detection mould certainly detects the fault of described reverse gear pressure switch according to the integrity of described reverse gear pressure switch, wherein, the integrity of described reverse gear pressure switch comprises that described reverse gear pressure switch is with respect to the state of manual selector valve position.
The control system of scheme 5. as described in scheme 2, is characterized in that, described fault detection module detects the indication of turbine trip speed sudden change according to the variation of torque converter turbine rotating speed in scheduled time slot, and wherein, described torque converter turbine couples mutually with described input shaft.
The control system of scheme 6. as described in scheme 1, is characterized in that, the predetermined quantity of described fault is for being more than or equal to 2, and wherein, the fault of described predetermined quantity occurs in scheduled time slot.
The control system of scheme 7. as described in scheme 1, it is characterized in that, described a plurality of condition comprises more than first condition, and wherein, described speed changer diagnostic module determines whether described more than first condition is true, wherein, when described more than first condition is true time, whether described speed changer diagnostic module monitoring there is predetermined low hydraulic fault symptom, wherein, when initial low hydraulic fault symptom being detected, described speed changer diagnostic module is waited for scheduled time slot, to detect the fault of the predetermined quantity corresponding with the scope of described more than first condition, and wherein, when the fault of described predetermined quantity being detected in described scheduled time slot, more than second condition is true.
The control system of scheme 8. as described in scheme 7, it is characterized in that, described more than first condition comprises first grade, the Transmission gear of neutral gear or reverse gear, engine speed, turbine trip speed, transmission output shaft speed and throttle position are less than respectively predetermined speed and position threshold, wherein, described more than second condition comprises that described primary fault is the symptom of low hydraulic pressure and described predetermined additional fault has occurred in described scheduled time slot, wherein, when described more than second condition is true time, low hydraulic pressure detected, and wherein, when described more than second condition is not true time, detected component failure.
The control system of scheme 9. as described in scheme 8, it is characterized in that, when described more than second condition is not true time, described speed changer diagnostic module produces TRANS PROGRAM, with the fault that detects described in indicating, be physical fault, and order speed changer diagnostic response, and wherein, when described more than second condition is true time, the restorative neutral gear of the initial gear while having ordered specific to low hydraulic pressure and consideration the 3rd many conditions.
The control system of scheme 10. as described in scheme 9, it is characterized in that, after thereby described more than second condition has been met the testing result of indicating low hydraulic pressure, described speed changer diagnostic module determines whether one or more in described the 3rd many conditions are true, and wherein, when the described the 3rd many conditions are not true time, if do not recovered in the neutral position in described manual selector valve and within the predetermined period, order described recovery neutral gear and the fault of having indicated low hydraulic pressure is set, if and there is low hydraulic pressure at the progressive position of described manual selector valve or the position of reversing gear, order at once described recovery neutral gear and the fault of having indicated low hydraulic pressure is set.
The control system of scheme 11. as described in scheme 10, it is characterized in that, the described the 3rd many conditions comprise that engine speed, turbine trip speed, transmission output shaft speed and throttle position are greater than respectively predetermined speed and position threshold, fault recovery, and the amount of time starting from the detection of described low hydraulic pressure.
The control system of scheme 12. as described in scheme 11, it is characterized in that, when the described the 3rd many conditions are not true time, the chance that existence recovers described predetermined failure, until one or more in described the 3rd many conditions are true time, and the TRANS PROGRAM of having indicated low hydraulic pressure when reaching scheduled time slot in neutral gear, described manual selector valve is set, or the TRANS PROGRAM of having indicated low hydraulic pressure when being in forward gears or reverse gear, described manual selector valve is set at once, wherein, described TRANS PROGRAM is set not to be stoped and recovers, and wherein, arranging and having indicated the described TRANS PROGRAM of low main pressure is not in described the 3rd many conditions.
The control system of scheme 13. as described in scheme 12, it is characterized in that, one or more in described the 3rd many conditions are true time, described speed changer diagnostic module has produced low hydraulic fault signal, wherein, stop the wait recovering from low main pressure, and wherein, ordered the Transmission gear that is suitable for described low hydraulics.
The control system of scheme 14. as described in scheme 12, is characterized in that, described speed changer diagnostic module does not produce low-voltage signal, because occurred to recover before producing low-voltage signal and described speed changer restarts normal operation.
The control system of scheme 15. as described in scheme 12, it is characterized in that, described speed changer diagnostic module produces low-voltage signal, wherein, there is valve and recover in any in described the 3rd many conditions, wherein before occurring, described speed changer restarts normal operation, and wherein, with described low-voltage signal, record temporary transient low hydraulic pressure, for further diagnosis.
16. 1 kinds of schemes, for controlling the method for hydraulic automatic transmission, comprising:
Detect the fault of the parts of described speed changer, wherein, described fault can be indicated the inefficacy of one or more parts of low hydraulic fluid pressure in described speed changer or described parts; And
According to the predetermined quantity of the described fault detecting, fault and a plurality of condition, determine whether described fault is because low hydraulic pressure causes.
The method of scheme 17. as described in scheme 16, is characterized in that, described parts comprise valve, reverse gear pressure switch, throttle position sensor, engine speed sensor, transmission output shaft velocity transducer and turbo speed sensor.
The method of scheme 18. as described in scheme 17, also comprise the fault that detects described valve according to the response of the integrity of described valve and described valve, wherein, the integrity of described valve is through the pressure drop of described valve while closing based on described valve, and wherein, the response of described valve is based on the described valve of order and activates the delay between described valve.
The method of scheme 19. as described in scheme 17, also comprise the fault that detects described reverse gear pressure switch according to the integrity of described reverse gear pressure switch, wherein, the integrity of described reverse gear pressure switch comprises that described reverse gear pressure switch is with respect to the state of manual selector valve position.
The method of scheme 20. as described in scheme 17, is also included in the indication that detects turbine trip speed sudden change in scheduled time slot according to the variation of torque converter turbine rotating speed, and wherein, described torque converter turbine couples mutually with described input shaft.
The method of scheme 21. as described in scheme 16, is characterized in that, the predetermined quantity of described fault is for being more than or equal to 2, and wherein, the fault of predetermined quantity occurs in scheduled time slot.
The method of scheme 22. as described in scheme 16, is characterized in that, described a plurality of conditions comprise more than first condition, and comprise:
Determine whether described more than first condition is true;
When described more than first condition is true time, whether the failure symptom of the low hydraulic pressure that monitoring is predetermined occurs;
When the failure symptom of initial low hydraulic pressure being detected, wait for that scheduled time slot is to detect the fault of the described predetermined quantity corresponding with the scope of described more than first condition, wherein, when the fault of described predetermined quantity being detected in described scheduled time slot, more than second condition is true.
The method of scheme 23. as described in scheme 22, it is characterized in that, described more than first condition comprises first grade, the Transmission gear of neutral gear or reverse gear, engine speed, turbine trip speed, transmission output shaft speed and throttle position are less than respectively predetermined speed and position threshold, wherein, described more than second condition comprise described primary fault be the symptom of low hydraulic pressure and in described scheduled time slot predetermined additional fault occur, wherein, when described more than second condition is true time, low hydraulic pressure detected, and wherein, when described more than second condition is not true time, component failure detected.
The method of scheme 24. as described in scheme 23, also comprises:
When described more than second condition is not true time, producing TRANS PROGRAM is physical fault to indicate the fault detecting, and order speed changer diagnostic response; And
When described more than second condition is true time, the restorative neutral gear of the initial gear while having ordered specific to low hydraulic pressure, and consider the 3rd many conditions.
The method of scheme 25. as described in scheme 24, also comprises:
Thereby be met to have indicated in described more than second condition, detect after low hydraulic pressure, determine whether one or more in described the 3rd many conditions are true; And
When the described the 3rd many conditions are not true time, if do not recovered in the neutral position in described manual selector valve and in scheduled time slot, order described restorative neutral gear and setting to indicate the fault of low hydraulic pressure, if or there is low hydraulic pressure in the progressive position of described manual selector valve or reverse gear position, would order at once described restorative neutral gear and setting to indicate the fault of low hydraulic pressure.
The method of scheme 26. as described in scheme 25, it is characterized in that, the described the 3rd many conditions comprise that engine speed, turbine trip speed, transmission output shaft speed and throttle position are greater than respectively predetermined speed and position threshold, fault recovery, and the amount of time starting from the detection of described low hydraulic pressure.
The method of scheme 27. as described in scheme 26, it is characterized in that, when the described the 3rd many conditions are not true time, existence allows chance that described predetermined failure recovers until one or more in described the 3rd many conditions, when described manual selector valve is when neutral gear reaches the scheduled time, the TRANS PROGRAM of having indicated low hydraulic pressure is set, or the TRANS PROGRAM of having indicated low hydraulic pressure is set when described manual selector valve is in forward gears or reverse gear at once, wherein, TRANS PROGRAM is set not to be stoped and recovers, and wherein, arranging and having indicated the described TRANS PROGRAM of low main pressure is not in described the 3rd many conditions.
The method of scheme 28. as described in scheme 27, also comprises, one or more in described the 3rd many conditions are true time, produce low hydraulic fault signal, stop the wait that recovers from low main pressure, and order is suitable for the Transmission gear of described low hydraulics.
The method of scheme 29. as described in scheme 27, also comprises: because there is recovery before producing described low-voltage signal, thus do not produce low-voltage signal, and restart the normal operation of described speed changer.
The method of scheme 30. as described in scheme 27, also comprise: produce low-voltage signal, and there is valve recovery before any generation in described the 3rd many conditions, restart the normal operation of described speed changer, and utilize described low-voltage signal to record temporary transient low hydraulic pressure, for further diagnosis.
From the detailed description that below provided, other application area of the present invention will become apparent.Should be understood that, detailed description and instantiation are only used for the object of explanation, rather than intention limits the scope of the invention.
Accompanying drawing explanation
From the detailed description and the accompanying drawings, present invention will become more fully understood, in accompanying drawing:
Fig. 1 is the functional block diagram according to exemplary engine system of the present invention;
Fig. 2 A is according to the schematic diagram of the flow of hydraulic fluid in exemplary hydraulic transformer of the present invention;
Fig. 2 B is according to the schematic diagram of the mechanical coupling (mechanicallinkage) in exemplary hydraulic transformer of the present invention;
Fig. 3 is the functional block diagram according to exemplary control module of the present invention; And
Fig. 4 makes the flow chart of the illustrative methods of response according to of the present invention for detection of the pressure loss in hydraulic automatic transmission and to it.
Embodiment
Being described in is below only exemplary in essence, and is never intention restriction invention, its application, or uses.For the sake of clarity, will indicate similar element with identical reference character in the accompanying drawings.Phrase used herein " at least one in A, B and C " is to be understood as the logic (A or B or C) representing by nonexcludability logical "or".Should be understood that, in the situation that not changing the principle of the invention, the step in method can be carried out by different orders.
Term used herein " module " refers to processor (shared, special-purpose or in groups) and storage, the combinational logic circuit of specific integrated circuit (ASIC), electronic circuit, the one or more software of execution or firmware program and/or other suitable components of described function is provided.
Conventional control system of speed variator can detect the fault of the valve in hydraulic automatic transmission.Then, control system of speed variator can determine whether to be keeped in repair speed changer when valve breaks down.Valve fault can occur due to the inefficacy of valve and/or electromagnetic coil.Yet alternatively, valve fault also can occur due to the low hydraulic pressure in speed changer.Yet, low hydraulic pressure also can be because other situations cause, for example, such as but not limited to: the damage of suction strainer, the amount of hydraulic fluid improper (, inappropriate hydraulic fluid filling) and/or due to the loosening loss of pressure from torque-converters (pressure drain) causing of seal ring.Therefore, conventional control system of speed variator can detect valve fault improperly due to low hydraulic fluid pressure.Detecting improperly valve fault can cause: because unsuitable valve body is changed the warranty costs increase causing and/or fails to repair the practical problem that causes low hydraulic fluid pressure.
Therefore, providing a kind of unit failure and definite fault detecting in hydraulic automatic transmission is herein the system and method for low hydraulic pressure or the indication of physical unit inefficacy.More precisely at definite primary fault, be, that before physical unit lost efficacy, this system and method can wait for detecting a plurality of faults.More specifically, this system and method can detect a plurality of valve faults in speed changer or get loose (dropout).For example, this system and method can detect getting loose of valve according to valve integrity and/or response valve time.Yet comprise in addition or alternatively, this system and method can detect the indication of low hydraulic pressure, fault and/or " turbine trip speed sudden change (turbine speed flare) " indication (TSF) of reverse gear pressure switch (RPS).For example, this system and method can detect RPS fault according to the integrity of RPS.In addition, for example this system and method can according to torque-converters in the undue fluctuation of rotating speed of the transmission input shaft that couples mutually of turbine detect TSF indication.TSF in forward gears or reverse gear gear gets loose and has indicated low hydraulic pressure together with valve and/or RPS.Similarly, at a plurality of valves of neutral gear gear, get loose and/or RPS gets loose and also can indicate low hydraulic pressure.
Then this system and method can determine whether the fault detecting is because low hydraulic pressure causes.More specifically, this system and method can determine whether to have detected predetermined quantity indication the fault of low hydraulic pressure.Only that the fault of predetermined quantity can be two faults for example.Yet whether this system and method is that can to require a plurality of conditions while causing due to low hydraulic pressure be true at definite primary fault.Described a plurality of condition can include but not limited to: (1) Transmission gear (range) comprises in first grade, reverse gear and neutral gear; (2) engine speed, turbine trip speed, transmission output shaft speed (TOSS) and throttle position are less than respectively predetermined speed and position threshold; And (3) primary fault has been indicated low hydraulic pressure (that is, meeting low hydraulic characteristic).
If a plurality of conditions are true described in when primary fault, this system and method can determine whether to have detected additional (or other (additional)) fault of predetermined quantity in scheduled time slot.More specifically, if the fault that is less than predetermined quantity detected in scheduled time slot, this system and method can determine Initial examination and measurement to fault be not because low hydraulic pressure causes.Yet, alternatively, if the additional fault of predetermined quantity detected in scheduled time slot, this system and method also can determine Initial examination and measurement to fault be because low hydraulic pressure causes.When detecting low hydraulic pressure, in all manual selector valves position, order has reflected the neutral gear gear of the valve position while losing efficacy.The specific neutral gear gear of command expiration, until occur to recover or the wait of a plurality of recovery condition termination to possible recovery.Recovery can be defined as detected fault disappearance (that is, eliminating).If there are the one or more conditions in a plurality of recovery conditions in the certain period after detecting low hydraulic pressure, this system and method can stop waiting for, so that from low hydraulic recovery.If recovered, can restart normal speed changer operation; Yet, if do not recovered, can order the Transmission gear consistent with low hydraulic pressure and can produce low hydraulic pressure signal.In other words, this system and method can detect the low hydraulic pressure in speed changer effectively, Wait-to-Restore, because the cause of a plurality of conditions stops the wait to recovering, then normally to move the signal that responds or responded and send low main pressure with the employing gear consistent with low hydraulic pressure, and do not need to keep in repair (that is, valve body change).
Described a plurality of recovery condition can include but not limited to: be greater than respectively engine speed, turbine trip speed, TOSS and the throttle position of predetermined speed and position threshold, and the termination of calibration period.If desired predetermined low hydraulic pressure indication does not occur within this period, this system and method can require to carry out valve maintenance (that is, this fault is not due to due to low hydraulic pressure).Alternatively, if desired predetermined low hydraulic pressure indication occurs and described a plurality of recovery condition in a generation (that is, this fault is due to due to low hydraulic pressure), this system and method can determine that speed changer is experiencing low hydraulic pressure.For example, this system and method can produce low hydraulic pressure signal with the driver of warning vehicle and/or require maintenance.
Referring now to Fig. 1,, engine system 10 comprises motor 12.Motor 12 is by entrance 16 by air intake intake manifold 14, and it can be regulated by closure 18.Throttle position sensor (TPS) 20 can produce the TPS signal of the position of having indicated closure 18.Air in intake manifold 14 can be assigned in a plurality of cylinders 22.Although there is shown 6 cylinders, motor 12 can comprise the cylinder of other quantity.
Be assigned to air in cylinder 22 can with the fuel mix from a plurality of fuel injectors 24, thereby form air/fuel (A/F) mixture.For example, fuel injector 24 can be spurted into fuel respectively the air inlet port (that is, port fuel injection) of cylinder 22.Alternatively, fuel injector 24 can inject directly into respectively (that is, direct fuel sprays) in each cylinder 22 fuel.
A/F mixture in cylinder 22 can be by piston (not shown) compression and respectively by the spark ignition from a plurality of spark plugs 26 (that is, spark ignition combustion).In addition or alternatively, A/F mixture can be compressed, thus until reach critical temperature and/or critical pressure causes automatic ignition (that is, homogeneous charge compression ignition or HCCI burning or compression ignition combustion, for example diesel engine).
The burning driven plunger (not shown) of A/F mixture in cylinder 22.Piston (not shown) thus bent axle 28 is rotated rotatably produces driving torque.Engine speed sensor 30 produces the engine speed signal (RPM) of the rotating speed (for example,, with rpm or RPMWei unit) of having indicated bent axle 28.The exhaust that burning forms is discharged from the cylinder 22 of motor 12 through gas exhaust manifold 32.Can process exhaust by exhaust-gas treatment system 34, to reduced discharge before exhaust is discharged into atmosphere.
Can the driving torque of generation be passed to vehicle transmission system 36 (for example, wheel) from bent axle 28 via torque-converters 38 and/or speed changer 40.Torque-converters 38 can couple bent axle 28 and speed changer 40 mutually.For example, torque-converters 38 can comprise the fluid coupling of hydraulic pressure, and speed changer 40 can comprise hydraulic automatic transmission.Turbine trip speed (TS) sensor 42 can produce the TS signal of the rotating speed of having indicated the turbine 39 in torque-converters 38.For example, TS sensor 42 also can be measured the rotating speed of the input shaft of speed changer 40.
The operation of control module 50 control engine systems 10.More specifically, control module 50 can be controlled closure 18, fuel injector 24, spark plug 26, torque-converters 38 and speed changer 40.Yet control module 50 also can be controlled the miscellaneous part of engine system 10.Control module 50 also can receive the signal from TPS sensor 20, RPM sensor 30, TP sensor 42 and TOSS sensor 44.Yet control module 50 also can receive from the indication of other sensors the signal of various other engine operating parameters (that is, measurement result).Control module 50 also can be implemented system of the present invention and/or method.
Referring now to Fig. 2 A,, in figure, illustrate in greater detail hydraulic fluid flowing between each valve in the valve body 41 of speed changer 40.Valve body 41 receives the hydraulic fluid (HF) of pressurization.For example, valve body 41 can receive the hydraulic fluid from the pressurization of the main pump in torque-converters 38.Yet valve body 41 also can receive the hydraulic fluid from the pressurization of other pumps or engine components.Valve body 41 also can communicate with control module 50.More specifically, for example the fault of all parts of valve body 41 can be controlled and/or diagnose to control module 50.
Valve 52～56 jointly represents that hydraulic fluid can flow through valve body 41 to activate the mulitpath of various transmission components (TCs).For example, transmission components can include but not limited to servomechanism, clutch, etc.In other words, can open one or more in valve 52～56 to allow hydraulic fluid to flow to one or more in transmission components, and activate one or more (for example, the clutches) in transmission components.Only that valve 52～56 can be the spring-opposed valve with different spring rates, so each valve in valve 52～56 all can be depending on the pressure of hydraulic fluid and opens for example.Alternatively, be only for example, the mode control valve 52～56 of available electron, for example, by control module 50.
On the other hand, RPS 82 has indicated the state of manual selector valve 53.More specifically, when manual selector valve 53 is in forward gears or neutral gear, RPS 82 can be in the first state (" ON ").On the other hand, when manual selector valve 53 is in reverse gear position, RPS 82 can be in the second state (" OFF ").Therefore, control module 50 can be by communicating with RPS 82 state of determining manual selector valve 53.
Yet control module 50 also can detect valve fault.More specifically, control module 50 can and/or respond the fault that detects the one or more valves in valve 52～56 according to the integrity of valve 52～56 (that is, the pressure drop of process valve).The integrity of valve can be depending on valve while closing through the pressure drop of valve.Therefore, for example when through the pressure drop of valve, be greater than corresponding to integrity threshold value (that is, pressure leakage) predetermined pressure drop time, control module 50 can detect the fault of a valve in valve 52～56.The response of valve can be depending on that order valve is opened and the time length of valve between starting to open.Can or give an order to valve via electronic signal via the hydraulic fluid pressurizeing.Therefore, for example, when the response of valve is greater than response lag (that is, valve damages or stops up), control module 50 can detect the fault of a valve in valve 52～56.In addition, control module 50 can detect according to the integrity of RPS 82 fault of RPS 82.The integrity of RPS 82 can be depending on RPS 82 with respect to the position of manual selector valve 52.When control module 50 determine RPS 82 be OFF (that is, in the second state) and manually selector valve 53 be during at forward gears or neutral gear, may there is low hydraulic state, or may have RPS integrity state.
Referring now to Fig. 2 B,, in figure, illustrate in greater detail the mechanical coupling between all parts of speed changer 40.In other words, the not shown hydraulic fluid of Fig. 2 B is through flow (being shown in Fig. 2 A) of the valve 52～56 in valve body 41.In one embodiment, speed changer 40 can be 6 gear transmissions, as shown in the figure.Yet, be understandable that, also can adopt various other speed changers, for example dissimilar speed changer, and the speed changer that comprises varying number gear.Only that this speed changer can be dual-clutch transmission for example.Speed changer 40 also can communicate with control module 50.More specifically, for example the fault of all parts of speed changer 40 can be controlled and/or diagnose to control module 50.
Planetary gear set 64A, 64B and 64C comprise central gear 66A, 66B and 66C separately, support 68A, 68B and 68C, planetary pinion 70A, 70B and 70C, and ring gear 72A, 72B and 72C.Speed changer 40 also comprises clutch C1～C5, and clutch C1～C5 is selectively engaged to establish the velocity ratio of the expectation of speed changer 40.More specifically, input shaft 60 is the central gear 66A of driving cluster gear 64A continuously, via clutch C1 optionally central gear 66B, the 66C of driving cluster gear 64B, 64C, and via the clutch C2 support 68B of driving cluster gear 64B optionally.Ring gear 72A, the 72B of gear train 64A, 64B and 64C and 72C respectively via clutch C3, C4 and C5 by optionally affixed.
Provide hydraulic pressure (PHYD) to regulate the joint of each clutch optionally to each clutch.In other words, this hydraulic pressure PHYD can allow flow through particular valve in valve body 41 and corresponding clutch is engaged of hydraulic fluid.Pressure switch 80 can be associated with the pressure piping to each clutch, and switches between ON state and OFF state.More specifically, when PHYD is during lower than threshold pressure (PTHR), switch is in OFF state.When PHYD is greater than PTHR, switch is in ON state.
As the diagram in following table 1, state that can solenoidoperated cluthes C1～C5 (that is, joint or separated), with provide 6 forward velocity than (1,2,3,4,5 and 6), 1 reverse speed than (R) or neutral state (N).
Table 1
| C1 | C2 | C3 | C4 | C5 | |
| The 1st forward velocity ratio | X | X | |||
| The 2nd forward velocity ratio | X | X | |||
| The 3rd forward velocity ratio | X | X | |||
| The 4th forward velocity ratio | X | X | |||
| The 5th forward velocity ratio | X | X | |||
| The 6th forward velocity ratio | X | X | |||
| Reverse speed is than (R) | X | X | |||
| Neutral state (N) | X |
For example, when clutch C1 and C4 joint, establish the second forward velocity than (that is, second gear).Conventionally can realize the conversion of comparing another forward velocity ratio from the forward velocity of a speed by make a clutch separation (that is, being about to separated clutch) engage another clutch (that is, being about to the clutch of joint) simultaneously.For example, can be by making the separated engaging clutch C5 simultaneously of clutch C4, thus make speed changer 40 lower category first grade from second gear.
In addition, RPS 82 can change between the indication of the manually forward gears of selector valve 53 or the indication of neutral position and the reverse gear position of manual selector valve 53.In other words, for example RPS 82 can be at forward gears or neutral gear to indicate manual selector valve 53 in ON state (that is, the first state).Yet it is in reverse gear position to indicate manual selector valve 53 that RPS 82 can be switched to OFF state (that is, the second state).For example, by the input from vehicle driver (, speed change lever), control manual selector valve 53, and RPS 82 has reflected the state of manual selector valve 53.RPS 82 does not reflect Transmission gear.
Yet control module 50 also can be carried out RPS and diagnose and detect TSF indication.More specifically, control module 50 can detect according to the integrity of RPS 82 fault of RPS 82.The integrity of RPS 82 can be depending on the position that activates the required pressure of RPS 82 and manual selector valve 53.Therefore, for example control module 50 can detect the integrity failure of RPS 82.RPS integrity failure can be in forward gears or neutral gear and RPS 82 at manual selector valve 53 and be transformed into while closing (OFF) state and occur from opening (ON) state.RPS integrity failure also can be in reverse gear position and RPS82 at manual selector valve 53 and be transformed into while opening (ON) state and occur from (OFF) state of closing.In addition, in scheduled time slot, when the variation of TS (that is, the rotating speed of input shaft) is greater than prearranging quatity, control module 50 can detect TSF indication.
Referring now to Fig. 3,, in figure, illustrate in greater detail control module 50.Control module 50 can comprise fault detection module 90 and speed changer diagnostic module 95.Although illustrate a fault detection module 90, control module 50 can comprise a plurality of fault detection module that detect separately dissimilar fault (for example, valve fault, RPS integrity failure, TSF indication etc.).
The fault detecting that speed changer diagnostic module 95 receives from fault detection module 90.Speed changer diagnostic module 95 also can receive throttle position from TPS sensor 20, from the engine speed of RPM sensor 30 with from the turbine trip speed of TS sensor 42.Speed changer diagnostic module 95 also can receive other signals of other motors of indication and speed changer Operational Limits (for example, speed, pressure, temperature etc.).
Speed changer diagnostic module 95 determines whether detected fault is the error diagnosis causing due to the low hydraulic pressure in speed changer 40.In other words, speed changer diagnostic module 95 can determine whether detected fault is whether physical fault or detected fault are because the low hydraulic pressure in speed changer 40 causes.Therefore, speed changer diagnostic module 95 can produce low-voltage signal or TRANS PROGRAM signal.
It is because low hydraulic pressure causes that low-voltage signal can be indicated the fault of the detection in speed changer 40.For example, low-voltage signal can need to keep in repair by alerting driver, to repair the low pressure (that is, pressure leakage) in speed changer 40.Alternatively, can to indicate the fault of the detection in speed changer 40 be physical fault to TRANS PROGRAM signal.In other words, for example TRANS PROGRAM signal can be indicated and need to be keeped in repair to valve body 41 (or replacing), to repair valve fault or RPS integrity failure.
First, if a plurality of conditions are "True" when detecting primary fault, speed changer diagnostic module 95 can be waited for so, until the fault of predetermined quantity detected.For example, the predetermined quantity of fault can be two.In other words, wait for the wrong diagnosis (that is, increasing robustness) that can prevent from causing unnecessary maintenance (and therefore causing warranty costs to increase) more than the fault detecting of 1.In one embodiment, then speed changer diagnostic module 95 can determine that detected fault is physical fault (that is, not being the wrong diagnosis causing due to low pressure).Therefore, such as speed changer diagnostic module 95, can wait until produce TRANS PROGRAM signal during the fault of predetermined quantity.If the period predetermined before detecting the fault of predetermined quantity passes by, can produce TRANS PROGRAM signal.
Yet alternatively, transmission control module 95 can detect the fault of predetermined quantity in scheduled time slot.More specifically, when described a plurality of conditions are "True", transmission control module 95 can determine that initial inefficacy is because low hydraulic pressure rather than component failure in speed changer 40 cause, and this is because there is the additional fault of predetermined quantity in scheduled time slot.For judging that whether primary failure is to comprise due to a plurality of conditions that low hydraulic pressure causes: the Transmission gear of first grade, neutral gear or reverse gear, engine speed, turbine trip speed, TOSS is less than calibration, and the failure symptom of low hydraulic pressure.
Therefore, when the fault of predetermined quantity detected and occur not recover in scheduled time slot and when manually selector valve 53 is in neutral position, transmission control module 95 can produce low-voltage signal simultaneously.Similarly, if detected low hydraulic pressure, manually selector valve 53 is in reverse gear position or progressive position simultaneously, and transmission control module 95 can be set low-voltage signal so.No matter whether transmission control module 95 has produced low-voltage signal, can continue, until a generation in described a plurality of recovery condition to the wait recovering.Described a plurality of recovery condition comprises respectively the recovery of following condition: low hydraulic pressure, engine speed, turbine trip speed, TOSS, throttle position and/or be greater than time of the passage of threshold value.Low-voltage signal can be used to alerting driver (for example,, by fault indicating lamp or MIL).Then driver can diagnose and keep in repair the low pressure (that is, pressure leakage) in speed changer 40 to vehicle.
Referring now to Fig. 4,, for detection of the pressure loss in hydraulic automatic transmission method that it is made to response, start from step 100.In step 100, control module 50 determines whether motor 12 is opened.If "True", controlling method may continue to step 104.If " vacation ", controlling method can be back to step 100.
In step 104, control module 50 detectable failures.For example, this fault can comprise one or more in valve fault, RPS integrity failure and TSF indication.In step 108, a plurality of conditions are checked, to determine whether primary fault can be the symptom of low main pressure.If "True", controlling method may continue to step 112.If " vacation ", controlling method may continue to step 116.
In step 112, control module 50 can be determined the additional fault whether predetermined quantity has occurred within the time of prearranging quatity.If "True", controlling method may continue to 120.If " vacation ", controlling method may continue to 116.
In step 116, control module 50 can determine that the fault detecting is physical fault.For example, control module 50 can produce alerting driver and/or require TRANS PROGRAM signal that the valve body 41 of speed changer 40 is keeped in repair/changed.Then controlling method can finish.In step 120, control module 50 can determine that the fault detecting is the fault of the error diagnosis that causes due to the low hydraulic pressure in speed changer 40.For example, control module 50 can produce the low-voltage signal that alerting driver and/or requirement are keeped in repair, to diagnose and to repair the reason (that is, pressure leakage) of low hydraulic pressure.Then controlling method can finish.
Extensive instruction of the present invention can be implemented in a variety of forms.Therefore, although present invention includes instantiation, true scope of the present invention should not be limited to this, because for one of ordinary skill in the art, on the basis of studying accompanying drawing, specification and claims carefully, other modifications will be apparent.
Claims (30)
1. for a control system for hydraulic automatic transmission, comprising:
Fault detection module, it detects the fault of the parts of described speed changer, and wherein, described fault can be indicated low hydraulic fluid pressure in described speed changer or the inefficacy of the one or more parts in described parts; And
Speed changer diagnostic module, its according to described in the fault, predetermined quantity and a plurality of condition of fault that detect determine whether described fault is because low hydraulic pressure causes.
2. control system as claimed in claim 1, is characterized in that, described parts comprise valve, reverse gear pressure switch, throttle position sensor, engine speed sensor, transmission output shaft velocity transducer and turbo speed sensor.
3. control system as claimed in claim 2, it is characterized in that, described fault detection module detects the fault of described valve according to the response of the integrity of described valve and described valve, wherein, the integrity of described valve is through the pressure drop of described valve while closing based on described valve, and wherein, the response of described valve is based on the described valve of order and activates the delay between described valve.
4. control system as claimed in claim 2, it is characterized in that, described fault detection module detects the fault of described reverse gear pressure switch according to the integrity of described reverse gear pressure switch, wherein, the integrity of described reverse gear pressure switch comprises that described reverse gear pressure switch is with respect to the state of manual selector valve position.
5. control system as claimed in claim 2, is characterized in that, described fault detection module detects the indication of turbine trip speed sudden change according to the variation of torque converter turbine rotating speed in scheduled time slot, and wherein, described torque converter turbine couples mutually with input shaft.
6. control system as claimed in claim 1, is characterized in that, the predetermined quantity of described fault is for being more than or equal to 2, and wherein, the fault of described predetermined quantity occurs in scheduled time slot.
7. control system as claimed in claim 1, it is characterized in that, described a plurality of condition comprises more than first condition, and wherein, described speed changer diagnostic module determines whether described more than first condition is true, wherein, when described more than first condition is true time, whether described speed changer diagnostic module monitoring there is predetermined low hydraulic fault symptom, wherein, when initial low hydraulic fault symptom being detected, described speed changer diagnostic module is waited for scheduled time slot, to detect the additional fault of the predetermined quantity corresponding with the scope of described more than first condition, and wherein, when the additional fault of described predetermined quantity being detected in described scheduled time slot, more than second condition is true.
8. control system as claimed in claim 7, it is characterized in that, described more than first condition comprises first grade, the Transmission gear of neutral gear or reverse gear, engine speed, turbine trip speed, transmission output shaft speed and throttle position are less than respectively predetermined speed and position threshold, wherein, described more than second condition comprises that described primary fault is the symptom of low hydraulic pressure and the additional fault that described predetermined quantity has occurred in described scheduled time slot, wherein, when described more than second condition is true time, low hydraulic pressure detected, and wherein, when described more than second condition is not true time, detected component failure.
9. control system as claimed in claim 8, it is characterized in that, when described more than second condition is not true time, described speed changer diagnostic module produces TRANS PROGRAM, with the fault that detects described in indicating, be physical fault, and order speed changer diagnostic response, and wherein, when described more than second condition is true time, the restorative neutral gear of the initial gear while having ordered specific to low hydraulic pressure and consideration the 3rd many conditions.
10. control system as claimed in claim 9, it is characterized in that, after thereby described more than second condition has been met the testing result of indicating low hydraulic pressure, described speed changer diagnostic module determines whether one or more in described the 3rd many conditions are true, and wherein, when the described the 3rd many conditions are not true time, if do not recovered in the neutral position in described manual selector valve and within the predetermined period, order described recovery neutral gear and the fault of having indicated low hydraulic pressure is set, if and there is low hydraulic pressure at the progressive position of described manual selector valve or the position of reversing gear, order at once described recovery neutral gear and the fault of having indicated low hydraulic pressure is set.
11. control system as claimed in claim 10, it is characterized in that, the described the 3rd many conditions comprise that engine speed, turbine trip speed, transmission output shaft speed and throttle position are greater than respectively predetermined speed and position threshold, fault recovery, and the amount of time starting from the detection of described low hydraulic pressure.
12. control system as claimed in claim 11, it is characterized in that, when the described the 3rd many conditions are not true time, the chance that existence recovers described predetermined failure, until one or more in described the 3rd many conditions are true time, and the TRANS PROGRAM of having indicated low hydraulic pressure when reaching scheduled time slot in neutral gear, described manual selector valve is set, or the TRANS PROGRAM of having indicated low hydraulic pressure when being in forward gears or reverse gear, described manual selector valve is set at once, wherein, described TRANS PROGRAM is set not to be stoped and recovers, and wherein, arranging and having indicated the described TRANS PROGRAM of low main pressure is not in described the 3rd many conditions.
13. control system as claimed in claim 12, it is characterized in that, one or more in described the 3rd many conditions are true time, described speed changer diagnostic module has produced low hydraulic fault signal, wherein, stop the wait recovering from low main pressure, and wherein, ordered the Transmission gear that is suitable for described low hydraulics.
14. control system as claimed in claim 12, is characterized in that, described speed changer diagnostic module does not produce low-voltage signal, because occurred to recover before producing low-voltage signal and described speed changer restarts normal operation.
15. control system as claimed in claim 12, it is characterized in that, described speed changer diagnostic module produces low-voltage signal, wherein, there is valve and recover in any in described the 3rd many conditions, wherein before occurring, described speed changer restarts normal operation, and wherein, with described low-voltage signal, record temporary transient low hydraulic pressure, for further diagnosis.
16. 1 kinds for controlling the method for hydraulic automatic transmission, comprising:
Detect the fault of the parts of described speed changer, wherein, described fault can be indicated the inefficacy of one or more parts of low hydraulic fluid pressure in described speed changer or described parts; And
According to the predetermined quantity of the described fault detecting, fault and a plurality of condition, determine whether described fault is because low hydraulic pressure causes.
17. methods as claimed in claim 16, is characterized in that, described parts comprise valve, reverse gear pressure switch, throttle position sensor, engine speed sensor, transmission output shaft velocity transducer and turbo speed sensor.
18. methods as claimed in claim 17, also comprise the fault that detects described valve according to the response of the integrity of described valve and described valve, wherein, the integrity of described valve is through the pressure drop of described valve while closing based on described valve, and wherein, the response of described valve is based on the described valve of order and activates the delay between described valve.
19. methods as claimed in claim 17, also comprise the fault that detects described reverse gear pressure switch according to the integrity of described reverse gear pressure switch, wherein, the integrity of described reverse gear pressure switch comprises that described reverse gear pressure switch is with respect to the state of manual selector valve position.
20. methods as claimed in claim 17, are also included in the indication that detects turbine trip speed sudden change in scheduled time slot according to the variation of torque converter turbine rotating speed, and wherein, described torque converter turbine couples mutually with input shaft.
21. methods as claimed in claim 16, is characterized in that, the predetermined quantity of described fault is for being more than or equal to 2, and wherein, the fault of predetermined quantity occurs in scheduled time slot.
22. methods as claimed in claim 16, is characterized in that, described a plurality of conditions comprise more than first condition, and comprise:
Determine whether described more than first condition is true;
When described more than first condition is true time, whether the failure symptom of the low hydraulic pressure that monitoring is predetermined occurs;
When the failure symptom of initial low hydraulic pressure being detected, wait for that scheduled time slot is to detect the fault of the described predetermined quantity corresponding with the scope of described more than first condition, wherein, when the fault of described predetermined quantity being detected in described scheduled time slot, more than second condition is true.
23. methods as claimed in claim 22, it is characterized in that, described more than first condition comprises first grade, the Transmission gear of neutral gear or reverse gear, engine speed, turbine trip speed, transmission output shaft speed and throttle position are less than respectively predetermined speed and position threshold, wherein, described more than second condition comprise described primary fault be the symptom of low hydraulic pressure and in described scheduled time slot predetermined additional fault occur, wherein, when described more than second condition is true time, low hydraulic pressure detected, and wherein, when described more than second condition is not true time, component failure detected.
24. methods as claimed in claim 23, also comprise:
When described more than second condition is not true time, producing TRANS PROGRAM is physical fault to indicate the fault detecting, and order speed changer diagnostic response; And
When described more than second condition is true time, the restorative neutral gear of the initial gear while having ordered specific to low hydraulic pressure, and consider the 3rd many conditions.
25. methods as claimed in claim 24, also comprise:
Thereby be met to have indicated in described more than second condition, detect after low hydraulic pressure, determine whether one or more in described the 3rd many conditions are true; And
When the described the 3rd many conditions are not true time, if do not recovered in the neutral position in described manual selector valve and in scheduled time slot, order described restorative neutral gear and setting to indicate the fault of low hydraulic pressure, if or there is low hydraulic pressure in the progressive position of described manual selector valve or reverse gear position, would order at once described restorative neutral gear and setting to indicate the fault of low hydraulic pressure.
26. methods as claimed in claim 25, it is characterized in that, the described the 3rd many conditions comprise that engine speed, turbine trip speed, transmission output shaft speed and throttle position are greater than respectively predetermined speed and position threshold, fault recovery, and the amount of time starting from the detection of described low hydraulic pressure.
27. methods as claimed in claim 26, it is characterized in that, when the described the 3rd many conditions are not true time, existence allows chance that described predetermined failure recovers until one or more in described the 3rd many conditions, when described manual selector valve is when neutral gear reaches the scheduled time, the TRANS PROGRAM of having indicated low hydraulic pressure is set, or the TRANS PROGRAM of having indicated low hydraulic pressure is set when described manual selector valve is in forward gears or reverse gear at once, wherein, TRANS PROGRAM is set not to be stoped and recovers, and wherein, arranging and having indicated the described TRANS PROGRAM of low main pressure is not in described the 3rd many conditions.
28. methods as claimed in claim 27, also comprise, one or more in described the 3rd many conditions are true time, produce low hydraulic fault signal, stop the wait that recovers from low main pressure, and order are suitable for the Transmission gear of described low hydraulics.
29. methods as claimed in claim 27, also comprise: because there is recovery before producing described low-voltage signal, thus do not produce low-voltage signal, and restart the normal operation of described speed changer.
30. methods as claimed in claim 27, also comprise: produce low-voltage signal, and there is valve recovery before any generation in described the 3rd many conditions, restart the normal operation of described speed changer, and utilize described low-voltage signal to record temporary transient low hydraulic pressure, for further diagnosis.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US25979209P | 2009-11-10 | 2009-11-10 | |
| US61/259,792 | 2009-11-10 | ||
| US61/259792 | 2009-11-10 | ||
| US12/730530 | 2010-03-24 | ||
| US12/730,530 US8543279B2 (en) | 2009-11-10 | 2010-03-24 | System and method for detecting and responding to pressure losses in a hydraulic automatic transmission |
| US12/730,530 | 2010-03-24 |
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| CN102050109A CN102050109A (en) | 2011-05-11 |
| CN102050109B true CN102050109B (en) | 2014-04-02 |
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| CN201010546278.0A Expired - Fee Related CN102050109B (en) | 2009-11-10 | 2010-11-10 | System and method for detecting and responding to the pressure loss in hydraulic automatic transmission |
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| US8731792B2 (en) * | 2011-09-23 | 2014-05-20 | GM Global Technology Operations LLC | System and method for estimating hydraulic pressure within and controlling a dry dual clutch transmission |
| US11022060B2 (en) * | 2017-06-08 | 2021-06-01 | Cummins Inc. | Diagnostic systems and methods for isolating failure modes of a vehicle |
| CN114194124A (en) * | 2021-12-30 | 2022-03-18 | 合肥工业大学 | Method and system for detecting walking fault of double-flow transmission vehicle |
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| CN101230915A (en) * | 2007-01-24 | 2008-07-30 | 通用汽车环球科技运作公司 | Method and apparatus to monitor devices of a hydraulic circuit of an electro-mechanical transmission |
| CN101501370A (en) * | 2006-08-03 | 2009-08-05 | 丰田自动车株式会社 | Diagnostic system for automatic transmission |
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| JP4314522B2 (en) * | 2004-03-31 | 2009-08-19 | 株式会社デンソー | Automatic transmission control device |
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| US5481906A (en) * | 1993-06-30 | 1996-01-09 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Fault diagnosis apparatus and method for vehicle control system |
| US6357289B1 (en) * | 1999-08-20 | 2002-03-19 | Jatco Transtechnology Ltd. | Automatic transmission control system having fail-safe function |
| CN1497251A (en) * | 2002-10-11 | 2004-05-19 | 丰田自动车株式会社 | Device and method for determining fault of automatic transmission |
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