WO2012133772A1 - 変速機の制御装置および変速機の制動トルク発生判定方法 - Google Patents
変速機の制御装置および変速機の制動トルク発生判定方法 Download PDFInfo
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- WO2012133772A1 WO2012133772A1 PCT/JP2012/058591 JP2012058591W WO2012133772A1 WO 2012133772 A1 WO2012133772 A1 WO 2012133772A1 JP 2012058591 W JP2012058591 W JP 2012058591W WO 2012133772 A1 WO2012133772 A1 WO 2012133772A1
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- WIPO (PCT)
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- transmission
- determination
- solenoid valves
- output shaft
- braking torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/10—Conjoint control of vehicle sub-units of different type or different function including control of change-speed gearings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/04—Conjoint control of vehicle sub-units of different type or different function including control of propulsion units
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W10/00—Conjoint control of vehicle sub-units of different type or different function
- B60W10/18—Conjoint control of vehicle sub-units of different type or different function including control of braking systems
- B60W10/196—Conjoint control of vehicle sub-units of different type or different function including control of braking systems acting within the driveline, e.g. retarders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/14—Inputs being a function of torque or torque demand
- F16H59/16—Dynamometric measurement of torque
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/4192—Detecting malfunction or potential malfunction, e.g. fail safe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
- B60Y2400/00—Special features of vehicle units
- B60Y2400/30—Sensors
- B60Y2400/308—Electric sensors
- B60Y2400/3084—Electric currents sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1204—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures for malfunction caused by simultaneous engagement of different ratios resulting in transmission lock state or tie-up condition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/12—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures
- F16H2061/1208—Detecting malfunction or potential malfunction, e.g. fail safe; Circumventing or fixing failures with diagnostic check cycles; Monitoring of failures
Definitions
- the present invention relates to a transmission control device and a braking torque generation determination method for the transmission.
- this type of transmission control device is a transmission control device that drives two of five linear solenoid valves to form a gear stage, and includes the solenoids of any three linear solenoid valves.
- the main object of the transmission control device and the transmission braking torque generation determination method of the present invention is to more appropriately determine whether or not the braking torque is generated on the output shaft of the transmission.
- the transmission control device and the transmission braking torque generation determination method of the present invention employ the following means in order to achieve the main object described above.
- the transmission control device of the present invention includes: m (m ⁇ 3) solenoid valves are provided, and the n1 engagement elements are engaged by the hydraulic pressure of n1 (2 ⁇ n1 ⁇ m) of the m solenoid valves.
- a transmission control device that achieves the following shift stage, An actual current value detecting means for detecting an actual current value flowing through each of the solenoids of the m solenoid valves; Determination of whether or not braking torque is generated on the output shaft of the transmission by comparing the detected actual current value of the solenoids of n2 solenoid valves (n1 ⁇ n2 ⁇ m) with a current threshold value. Means, It is a summary to provide.
- the actual current value flowing through each of the solenoids of the m solenoid valves is detected, and the actual current value of the solenoids of the n2 solenoid valves (n1 ⁇ n2 ⁇ m) By comparing with the current threshold value, it is determined whether or not braking torque is generated on the output shaft of the transmission.
- the control device, the signal transmission system between the solenoid valve and the control device, and the n2 engagement elements are engaged, it is considered that braking torque is generated on the output shaft of the transmission. .
- the hydraulic pressures of the n2 solenoid valves are compared with those for comparing the current command values of the n2 solenoid valves with the current threshold values.
- the “engagement element” includes a clutch for connecting and releasing the two rotating systems, and a brake for fixing and releasing the fixing to a non-rotating system such as a case of one rotating system. .
- the engagement of the engagement element includes not only complete engagement but also half-engagement (engagement in which a rotational speed difference occurs between the input side and the output side of the engagement element).
- the comparison between the actual current value of the solenoid of the n2 solenoid valves and the current threshold value may be made by comparing the actual current value of the solenoid of the n2 solenoid valve and the current threshold value, respectively, or n2 The sum of the actual current values of the solenoids of the solenoid valve may be compared with the current threshold value.
- the determination means determines whether or not a braking torque is generated on the output shaft of the transmission during execution of fast fill for changing the gear position of the transmission. It may be a means that does not determine.
- the actual current value of the solenoid of the solenoid valve corresponding to the engagement element (engagement side element) that is changed from the released state to the engaged state, and the engagement element that is released from the engaged state (released) may be a value that can be regarded as an engaged state. In this case, whether or not braking torque is generated on the output shaft of the transmission. If it is determined, there is a risk of erroneous determination. Therefore, erroneous determination can be suppressed by not determining whether or not braking torque is generated on the output shaft of the transmission during fast fill.
- the determination means outputs the output of the transmission when the detected actual current value of the solenoids of the n2 normally closed solenoid valves is equal to or greater than the current threshold value. It can also be a means for determining that braking torque is generated on the shaft. The determination means determines that a braking torque is generated on the output shaft of the transmission when the detected actual current value of the solenoids of the n2 normally open solenoid valves is equal to or less than the current threshold. It can also be.
- the determination means is configured such that the detected actual current value of a solenoid of a normally closed solenoid valve among the n2 solenoid valves is equal to or greater than the current threshold value and a normally open type of the n2 solenoid valves.
- the detected actual current value of the solenoid of the solenoid valve is equal to or less than the current threshold value, it may be means for determining that braking torque is generated on the output shaft of the transmission.
- the braking torque generation determination method for a transmission includes: m (m ⁇ 3) solenoid valves are provided, and the n1 engagement elements are engaged by the hydraulic pressure of n1 (2 ⁇ n1 ⁇ m) of the m solenoid valves.
- a brake torque generation determination method for a transmission that determines whether or not braking torque is generated on an output shaft of a transmission that achieves the following shift stage, (A) detecting an actual current value flowing through each of the solenoids of the m solenoid valves; (B) By comparing the detected actual current value of the solenoids of n2 (n1 ⁇ n2 ⁇ m) solenoid valves with a current threshold value, it is determined whether or not braking torque is generated on the output shaft of the transmission.
- the actual current value flowing through each of the m solenoid valves is detected, and the actual solenoids of n2 (n1 ⁇ n2 ⁇ m) solenoid valves are detected.
- the current value is determined whether or not braking torque is generated on the output shaft of the transmission.
- the hydraulic pressures of the n2 solenoid valves are compared with those for comparing the current command values of the n2 solenoid valves with the current threshold values.
- the “engagement element” includes a clutch for connecting and releasing the two rotating systems, and a brake for fixing and releasing the fixing to a non-rotating system such as a case of one rotating system. .
- the engagement of the engagement element includes not only complete engagement but also half-engagement (engagement in which a rotational speed difference occurs between the input side and the output side of the engagement element).
- the comparison between the actual current value of the solenoid of the n2 solenoid valves and the current threshold value may be made by comparing the actual current value of the solenoid of the n2 solenoid valve and the current threshold value, respectively, or n2 The sum of the actual current values of the solenoids of the solenoid valve may be compared with the current threshold value.
- An automatic transmission of a modification of the present invention is Three or more friction engagement elements, and a hydraulic circuit for supplying and discharging a working fluid to and from each friction engagement element by a solenoid valve corresponding to each friction engagement element, the three or more friction engagement elements
- An automatic transmission that realizes a plurality of shift speeds by engaging two friction engagement elements of different combinations,
- a determination element setting means for setting three of the three or more friction engagement elements as a determination element used for determining whether or not an abnormality has occurred in the hydraulic circuit;
- the set three determination elements are engaged with each of the three solenoid valves corresponding to the set three determination elements based on the combination of the set three determination elements.
- a predetermined time assumed current setting means for setting a predetermined time assumed current as a lower limit current assumed to be applied when a braking torque is applied to the output shaft of the transmission;
- three friction engagement elements among the three or more friction engagement elements are set as determination elements used for determining whether or not an abnormality has occurred in the hydraulic circuit, For each of the three solenoid valves corresponding to the set three determination elements, based on the combination of the three determination elements, the three determination elements are engaged and braking torque is applied to the output shaft of the transmission.
- the assumed current at the time as the lower limit current assumed to be applied when acting, and the current applied to each of the three solenoid valves corresponding to the three judgment elements corresponds to each It is determined that an abnormality has occurred in the hydraulic circuit when the current exceeds an assumed current at a predetermined time.
- the expected current at a predetermined time for each of the three solenoid valves corresponding to the three determination elements is set according to the combination of the three determination elements.
- the friction engagement element includes a clutch for connecting and releasing the two rotating systems and a brake for fixing and releasing the fixing to a non-rotating system such as a case of one rotating system. Furthermore, the engagement of the friction engagement element includes not only full engagement but also half engagement (engagement in which a rotational speed difference occurs between the input side and the output side of the friction engagement element).
- the predetermined-time assumed current setting means uses one of the set three determination elements as a target element, and sets the set three determination elements. Based on the combination, when the set three determination elements are engaged and braking torque is applied to the output shaft of the transmission, it is applied to a target solenoid valve that is a solenoid valve corresponding to the target element.
- a predetermined assumed current setting process for setting a predetermined assumed current as a lower limit current assumed to be present may be a means for executing each of the three determination elements as the target element. .
- the assumed current at a predetermined time for the target solenoid valve is set based on the combination of the three determination elements.
- the relationship between the rotation speed of the target element and the output shaft of the transmission is determined by the combination of the three determination elements. Therefore, the relationship between the braking torque acting on the output shaft of the transmission when the three determination elements are engaged and the current assumed to be applied to the target solenoid valve at that time is also three. It is based on the reason that it is thought that it differs depending on the combination of elements for determination.
- the predetermined-time assumed current setting means includes two determination elements excluding the target element among the three determination elements as the predetermined-time assumed current setting process.
- a first gear ratio that is a ratio of rotational speeds of the input shaft and the output shaft of the transmission when two non-target elements are engaged; and the second gear when the two non-target elements are engaged.
- a second gear ratio that is a ratio of a target element differential rotational speed that is a difference in rotational speed between an input side and an output side of the target element and a rotational speed of the output shaft of the transmission, and an input to the input shaft of the transmission
- the predetermined drag torque at a predetermined time is set as the drag torque assumed to be generated by the engagement of the target element when the three determination elements are engaged, and the set Expected drag torque at a given time
- a means for setting the current applied to the corresponding said target solenoid valve as the predetermined time assumed current may be a thing.
- the second gear ratio is a gear ratio obtained based on the first gear ratio, the rotational speed of the input shaft of the transmission, and the target element differential rotational speed. You can also. In this way, the predetermined assumed current can be set more appropriately.
- the determination element setting means selects three friction engagement elements from among the four or more friction engagement elements and sets them as the determination elements. It is also possible to assume that this is a means for executing three combinations while changing the three combinations.
- the abnormality determination unit determines that an abnormality has occurred in the hydraulic circuit
- the application of current to all of the three or more solenoid valves is stopped.
- a current stopping means In this way, it is possible to suppress the large braking torque from acting on the output shaft of the transmission, or to cancel the state when the large braking torque is acting.
- An abnormality determination method for a hydraulic circuit in an automatic transmission is as follows. Three or more friction engagement elements, and a hydraulic circuit for supplying and discharging a working fluid to and from each friction engagement element by a solenoid valve corresponding to each friction engagement element, the three or more friction engagement elements An abnormality determination method for a hydraulic circuit in an automatic transmission that realizes a plurality of shift stages by engaging two friction engagement elements having different combinations.
- A) Of the three or more friction engagement elements three friction engagement elements are set as determination elements used for determining whether or not an abnormality has occurred in the hydraulic circuit;
- the set three determination elements are based on a combination of the set three determination elements.
- a predetermined time assumed current as a lower limit current assumed to be applied when braking torque is applied to the output shaft of the transmission when engaged, (C)
- the hydraulic circuit is abnormal To determine that This is the gist.
- three friction engagement elements among the three or more friction engagement elements are used to determine whether an abnormality has occurred in the hydraulic circuit.
- the three determination elements are set as determination elements, and the three determination valves are engaged with each of the three solenoid valves corresponding to the set three determination elements based on the combination of the three determination elements.
- An assumed current at a predetermined time is set as a lower limit current assumed to be applied when a braking torque is applied to the output shaft, and is applied to each of the three solenoid valves corresponding to the three determination elements. It is determined that an abnormality has occurred in the hydraulic circuit when the current that is present is greater than or equal to the predetermined current assumed at each time.
- the expected current at a predetermined time for each of the three solenoid valves corresponding to the three determination elements is set according to the combination of the three determination elements.
- the friction engagement element includes a clutch for connecting and releasing the two rotating systems and a brake for fixing and releasing the fixing to a non-rotating system such as a case of one rotating system. Furthermore, the engagement of the friction engagement element includes not only full engagement but also half engagement (engagement in which a rotational speed difference occurs between the input side and the output side of the friction engagement element).
- FIG. 1 is a configuration diagram showing an outline of a mechanical configuration of an automatic transmission 20.
- FIG. 3 is an explanatory diagram showing an operation table showing the relationship between each gear position of the automatic transmission 30 and the operation states of clutches C-1 to C-3 and brakes B-1 and B-2.
- 3 is an explanatory diagram illustrating a collinear diagram illustrating the relationship between rotational speeds between rotating elements constituting the automatic transmission 30.
- FIG. 6 is an explanatory diagram showing an example of the relationship between clutches C-1 to C-3 and brake B1 and linear solenoid valves 52 to 58.
- FIG. 6 is a configuration diagram showing an outline of a configuration of an electric system 51 including solenoids 52s to 58s of linear solenoid valves 52 to 58. It is explanatory drawing which shows an example of the shift map. Input shaft rotation speed Nin at the time of changing the gear position of the automatic transmission 30, the hydraulic command value of the engagement side element and the release side element, and the actual hydraulic pressure, the current command value of the solenoid valve corresponding to the engagement side element and the release side element It is explanatory drawing which shows typically the mode of the time change of an actual current.
- 5 is a flowchart showing an example of a braking torque generation determination routine executed by a transmission ECU 80. It is a block diagram which shows the outline of a structure of the automatic transmission 110 of a modification. It is explanatory drawing which shows the action
- FIG. 1 is a configuration diagram showing an outline of a configuration of an automobile 10 equipped with an automatic transmission 20 as an embodiment of the present invention
- FIG. 2 is a configuration diagram showing an outline of a mechanical configuration of the automatic transmission 20.
- an automobile 10 according to the embodiment includes an engine 12 as an internal combustion engine that outputs power by explosion combustion of hydrocarbon fuel such as gasoline and light oil, and an engine that controls the operation of the engine 12.
- Electronic control unit hereinafter referred to as engine ECU
- fluid transmission device 22 attached to crankshaft 14 of engine 12
- input shaft 31 is connected to the output side of fluid transmission device 22, and gear mechanism 48.
- transmission of ECU includes a 80, a brake electronic control unit for controlling the electronically controlled hydraulic brake unit, not shown (hereinafter, the brake referred ECU) 17, a.
- the automatic transmission 20 of the embodiment mainly corresponds to the automatic transmission 30, the hydraulic circuit 50, and the transmission ECU 80. Further, the transmission ECU 80 corresponds to the transmission control device of the embodiment.
- Engine ECU16 is comprised as a microprocessor centering on CPU, and is provided with ROM which memorize
- the engine ECU 16 includes signals from various sensors for detecting the operating state of the engine 12 such as an engine rotational speed Ne from a rotational speed sensor 14 a attached to the crankshaft 14 and an accelerator opening Acc as an amount of depression of the accelerator pedal 93. Signals such as the accelerator opening Acc from the accelerator pedal position sensor 94 to be detected and the vehicle speed V from the vehicle speed sensor 98 are input via the input port, and the engine ECU 16 drives the throttle motor that drives the throttle valve. A signal, a control signal to the fuel injection valve, an ignition signal to the spark plug, and the like are output via the output port.
- the fluid transmission device 22 is configured as a fluid torque converter with a lock-up clutch, and serves as an input-side fluid transmission element connected to the crankshaft 14 of the engine 12 via the front cover 18.
- a turbine runner 24 as an output side fluid transmission element connected to the input shaft 31 of the automatic transmission 30 via a turbine hub, and the turbine runner disposed inside the pump impeller 23 and the turbine runner 24.
- the stator 25 which rectifies
- the fluid transmission device 22 functions as a torque amplifier by the action of the stator 25, and the difference in rotational speed between the pump impeller 23 and the turbine runner 24 is small. Sometimes it functions as a fluid coupling.
- the lock-up clutch 28 can execute lock-up and release of lock-up for connecting the pump impeller 23 (front cover 18) and the turbine runner 24 (turbine hub). When the up-on condition is satisfied, the pump impeller 23 and the turbine runner 24 are locked up by the lock-up clutch 28, and the power from the engine 12 is mechanically and directly transmitted to the input shaft 31. At this time, the fluctuation of the torque transmitted to the input shaft 31 is absorbed by the damper mechanism.
- the automatic transmission 30 is configured as a six-speed stepped transmission, and includes a single pinion planetary gear mechanism 35, a Ravigneaux planetary gear mechanism 40, and three clutches C-1, C-2, C-. 3 and two brakes B-1, B-2 and a one-way clutch F-1.
- the single pinion type planetary gear mechanism 35 includes a sun gear 36 as an external gear, a ring gear 37 as an internal gear disposed concentrically with the sun gear 36, and a plurality of gears meshed with the sun gear 36 and meshed with the ring gear 37.
- the pinion gear 38 and a carrier 39 that holds the plurality of pinion gears 38 so as to rotate and revolve freely.
- the sun gear 36 is fixed to the case, and the ring gear 37 is connected to the input shaft 31.
- the Ravigneaux planetary gear mechanism 40 includes two sun gears 41a and 41b as external gears, a ring gear 42 as an internal gear, a plurality of short pinion gears 43a meshing with the sun gear 41a, a sun gear 41b and a plurality of short pinion gears 43a.
- the sun gear 41a includes a plurality of long pinion gears 43b that mesh with the ring gear 42, and a carrier 44 that holds the plurality of short pinion gears 43a and the plurality of long pinion gears 43b in a freely rotating and revolving manner.
- FIG. 3 shows an operation table showing the relationship between the respective speeds of the automatic transmission 30 and the operating states of the clutches C-1 to C-3 and the brakes B-1 and B-2, and FIG. The collinear diagram which illustrates the relationship of the rotational speed between the rotation elements which comprise is shown. As shown in the operation table of FIG.
- the automatic transmission 30 is configured to turn on / off the clutches C-1 to C-3 (on is engaged and off is released) and brakes B-1 and B-2 are turned on / off. Can be switched between forward 1st to 6th, reverse and neutral.
- the three clutches C-1, C-2, C-3 and the two brakes B-1, B-2 are all hydraulically engaged by pressing the friction plate with a piston. It is comprised as a friction engagement element (friction clutch or friction brake).
- the fluid transmission device 22 and the automatic transmission 30 are operated by a hydraulic circuit 50 that is driven and controlled by the transmission ECU 80.
- the hydraulic circuit 50 includes an oil pump that pumps hydraulic oil using power from the engine 12, a primary regulator valve that adjusts hydraulic oil from the oil pump to generate a line pressure PL, and a line pressure PL from the primary regulator valve.
- Corresponding CL by adjusting PL Comprising a like plurality of linear solenoid valves 52-58 normally closed type that produces a solenoid pressure to the switch C-1 ⁇ C-3 and brake B-1, B-2.
- FIG. 5 is an explanatory diagram showing an example of the relationship between the clutches C-1 to C-3 and the brake B1 and the linear solenoid valves 52 to 58.
- the brake B2 is supplied with hydraulic oil from the solenoid valve 56 corresponding to the clutch C-3 via a switching valve (not shown) during engine braking at the first forward speed, and the operating position of the shift lever 91 is It was assumed that hydraulic oil was supplied from the manual valve at the reverse position (R position). That is, in the embodiment, the hydraulic circuit 50 does not have a linear solenoid valve dedicated to the brake B2.
- FIG. 6 is a configuration diagram showing an outline of the configuration of the electric system 51 including the solenoids 52s to 58s of the linear solenoid valves 52 to 58.
- the electric system 51 includes, in addition to the solenoids 52s to 58s whose one end is grounded, a DC power source 59, and transistors 52t to 52 as switching connected to the DC power source 59 and the other ends of the solenoids 52s to 58s. 58t and current sensors 52a to 58a that are provided between the solenoids 52s to 58s and the ground and detect currents flowing through the solenoids 52s to 58s.
- the current flowing through the solenoids 52s to 58s can be adjusted by adjusting the ratio of the on-time of the transistors 52t to 58t.
- the transmission ECU 80 is configured as a microprocessor centered on a CPU, and includes a ROM that stores a processing program, a RAM that temporarily stores data, an input / output port, and a communication port in addition to the CPU. .
- the transmission ECU 80 also includes a current monitor circuit 82 that monitors currents (actual currents) Ic1 to Ic3 and Ib1 (see FIG. 5) from the current sensors 52a to 58a.
- the transmission ECU 80 includes signals from various sensors for detecting the operating state of the engine 12 such as an engine rotational speed Ne from a rotational speed sensor 14 a attached to the crankshaft 14, and an input shaft 31.
- Ic3, Ib1 see FIG.
- a shift position SP from the shift position sensor 92 that detects the position of the shift lever 91, an accelerator opening Acc from the accelerator pedal position sensor 94, and a brake pedal that detects the depression amount of the brake pedal 95 Brake pedal position from position sensor 96 P, the vehicle speed V from the vehicle speed sensor 98, and the like are input via the input port, and the transmission ECU 80 receives control signals based on command current values Ic1 * to Ic3 * and Ib1 * to the transistors 52t to 58t (see FIG. 6) is output through the output port.
- the engine ECU 16, the brake ECU 17 and the transmission ECU 80 are connected to each other via a communication port, and exchange various control signals and data necessary for control with each other. Further, as the shift position SP of the shift lever 91, in the embodiment, a parking position (P position) used at the time of parking, a reverse position (R position) for reverse travel, a neutral position (N position), and a forward travel position are used. A normal drive position (D position) is prepared.
- the transmission ECU 80 determines the target gear position based on the accelerator opening Acc from the accelerator pedal position sensor 94, the vehicle speed V from the vehicle speed sensor 98, and the shift map in FIG. GS * is set so that the set target gear stage GS * is formed in the automatic transmission 30, that is, the target gear stage GS * of the clutches C-1 to C-3 and the brakes B-1 and B-2.
- the hydraulic circuit 50 is controlled so that the clutch and brake corresponding to the above are turned on (engaged state) and the other clutches and brakes are turned off (released state). Specifically, as shown in the shift map of FIG.
- the operation points including the accelerator opening Acc and the vehicle speed V are the 1-2 upshift line, 2-3 upshift line, 3-4 upshift line, 4
- the -5 upshift line and 5-6 upshift line are shifted from the left side to the right side when the gear position is less than the left number (for example, 1st to 2nd speed in the 2-3 upshift line)
- the clutches C-1 to C-3 and the brakes B-1 and B-2 are turned on and off to shift up to the right gear position (for example, the third speed on the 2-3 upshift line)
- the operation point consisting of vehicle speed V is 6-5 downshift line, 5-4 downshift line, 4-3 downshift line, 3-2 downshift line, 2-1 downshift line on the left
- the shift stage of the right number from the current shift stage for example, the 4-3 downshift line
- a friction engagement element that is turned on from off to on is called an engagement side element, and a friction engagement element that is turned on from off is called a release side element.
- FIG. 8 shows an input shaft rotation speed Nin at the time of changing the gear position of the automatic transmission 30, hydraulic command values and actual hydraulic pressures of the engagement side element and the release side element, and linear solenoids corresponding to the engagement side element and the release side element.
- It is explanatory drawing which shows typically the mode of the time change of the electric current command value of a valve
- time t1 the start of the shift process
- the engagement side element is first subjected to the fast stroke which is so-called looseness that eliminates the invalid stroke of the piston.
- Filling is executed (time t1 to t2), and after the completion, low-pressure standby is executed (time t2 to t3).
- a predetermined signal is output to the linear solenoid valve so that the engagement side hydraulic pressure becomes the predetermined hydraulic pressure P12.
- the predetermined pressure P12 fills the hydraulic chamber of a hydraulic servo (not shown), and a position immediately before the piston for engaging the engaging element comes into contact with the friction plate of the engaging element from the mounted state (does not cause torque transmission). It is the pressure to move to (position).
- the predetermined hydraulic pressure P12 is held for a predetermined time (t1 to t2) (fast fill). When the predetermined time (t1 to t2) elapses, the engagement side hydraulic pressure is set to a predetermined low pressure P23 lower than the predetermined hydraulic pressure P12, and is held at the predetermined low pressure P23 (low pressure standby).
- the predetermined low pressure P23 is set to a pressure that does not cause a rotational change in the input shaft rotational speed Nin under any circumstances, and the predetermined low pressure P23 is held until a predetermined time (t2 to t3) elapses.
- the release side element is slip-engaged by lowering the hydraulic pressure by one step from the engagement hydraulic pressure at which the release side is completely engaged.
- the actual hydraulic pressure for the engaging element is not so high, but the actual current for the disengaging element and the actual current for the engaging element are both relatively high. There is a case.
- torque phase control is performed to shift the element from the disengagement element to the engagement element.
- the torque phase is a state in which torque is started to be transmitted by the engagement element that operates in the engagement state, but the engagement element on the release side is not released. The speed of the element does not change and inertia torque does not occur.
- the input shaft rotation speed Nin begins to decrease (rotational change) and the inertia phase starts (time t4)
- the input shaft rotation speed is gradually increased by slip engagement of the engagement side element by gradually increasing the hydraulic pressure with respect to the engagement side element.
- Inertia phase control is executed to change Nin to a rotational speed (target rotational speed Nin *) corresponding to the speed stage after the shift.
- the inertia phase is a state in which the engagement element on the engagement side slides toward the engagement and the engagement element on the release side slides toward the release.
- a reduction process for temporarily reducing the torque of the engine 12 is performed in order to suppress the torque fluctuation of the output shaft 32.
- final control is performed to set the hydraulic pressure of the engagement side element to the maximum hydraulic pressure.
- the transmission ECU 80 drives and controls the linear solenoid valves 52 to 58 of the hydraulic circuit 50 in order to form the gear stage of the automatic transmission 30.
- the solenoid 52s is based on the accelerator opening Acc, the gear position of the automatic transmission 30, the torque of the input shaft 31 of the automatic transmission 30, the temperature of the hydraulic oil of the hydraulic circuit 50, and the like.
- Target current Ic1tag is set.
- the target current Ic1tag is set as the feedforward term Dffc1
- the feedback term Dfbc1 is set by the following equation (1) using the current Ic1 detected by the current sensor 52a and the target current Ic1tag, and the set feedforward is set.
- the sum of the term Dffc1 and the feedback term Dfbc1 is set to the command current value Ic1 *.
- a switching command for switching the transistor 52t is output to the transistor 52t at a duty ratio corresponding to the command current value Ic1 * (theoretically, the ratio of the on-time to the sum of the on-time and off-time of the transistor 52t).
- the drive of the transistor 52t is controlled.
- the equation (1) is a calculation formula of the feedback term in the current feedback control for canceling the difference between the current Ic1 and the target current Ic1tag.
- “kp” is the gain of the proportional term
- “ki” in the second term on the right side is the gain of the integral term.
- the linear solenoid valves 54 to 58 can be driven and controlled in the same manner as the linear solenoid valve 52. By such drive control, the currents Ic1 to Ic3 and Ib1 detected by the current sensors 52a to 58a can be set to the target currents Ic1tag to Ic3tag and Ib1tag.
- Dfbc1 kp (Ic1tag-Ic1) + ki ⁇ (Ic1tag-Ic1) dt (1)
- FIG. 9 is a flowchart illustrating an example of a braking torque generation determination routine that is executed by the transmission ECU 80. This routine starts executing when the system is activated.
- the braking torque generation determination routine uses the currents Ic1 to Ib1 applied (flowing) to the solenoids of the linear solenoid valves 52 to 58 from the current sensors 52a to 58a to output the automatic transmission 30. It is determined whether or not braking torque is generated on the shaft 32.
- the hydraulic circuit 50 (solenoid valves 52 to 58, etc.), the transmission ECU 80, the transmission ECU 80, and the solenoid valves 52 to 52 of the hydraulic circuit 50 are used.
- an abnormality occurs in the signal transmission system to 58 and the like, and the rotation prohibition abnormality state is established in which three of clutches C-1 to C-3 and brake B-1 are engaged.
- the braking torque generation determination routine uses the currents Ic1 to Ib1 applied to the solenoids of the linear solenoid valves 52 to 58 to apply the braking torque to the output shaft 32 of the automatic transmission 30.
- step S100 the transmission ECU 80 first selects three of the clutches C-1 to C-3 and the brake B-1 and applies them to the output shaft 32 of the automatic transmission 30.
- Determination elements Jc [1] to Jc [3] used for determining whether or not braking torque is generated are set (step S100).
- the process of step S100 is performed every time the clutches C-1 to C-3 (pattern 1), the clutches C-1 and C-2, the brake B-1 (pattern 2), and the clutch C-1 are executed.
- C-3 and brake B-1 pattern 3
- clutches C-2 and C-3 the brake B-1 (pattern 4)
- clutches C-1 to C-3 pattern 1
- a value 1 is set to the variable i (step S110), and according to the variable i among the determination elements Jc [1] to Jc [3].
- the determination element Jc [i] is set as a target element (hereinafter also referred to as target element Jc [i]) (step S120).
- the ratio of the rotational speed to 32 is set as the transmission ratio Tdiv1 [i], and the difference in rotational speed between the input side and the output side of the target element Jc [i] when the two non-target elements are engaged.
- a ratio between a certain target element differential rotation speed and the rotation speed of the output shaft 32 of the automatic transmission 30 is set as a transmission ratio Tdiv2 [i] (step S130).
- the transmission ratios Tdiv1 [i], Tdiv2 [i] are combinations of the three determination elements Jc [1] to Jc [3], the target element Jc [i], and the transmission ratios Tdiv1 [i], Tdiv2 [i]. ] Is determined in advance by experiment or analysis and stored in a ROM (not shown) of the transmission ECU 80, and a combination of the three determination elements Jc [1] to Jc [3].
- the target element Jc [i] is given, the corresponding gear ratios Tdiv1 [1] and Tdiv2 [i] are derived and set from the stored element gear ratio correspondence.
- the gear ratio Tdiv2 [i] corresponds to a value obtained by multiplying the gear ratio Tdiv1 [i] by the ratio between the rotational speed of the input shaft 31 of the automatic transmission 30 and the target element differential rotational speed.
- the clutches C-1 to C-3 are set as determination elements Jc [1] to Jc [3]
- the determination element Jc [1] (clutch C-1) is set as the target element Jc [1].
- the process of step S130 is performed as a rotational speed ratio between the input shaft 31 and the output shaft 32 (5 of the automatic transmission 30) when the two non-target elements (clutch C-2, C-3) are engaged.
- This ratio corresponds to a value obtained by multiplying the ratio of the rotational speed difference with the sun gear 41a side) by the speed ratio Tdiv1 [1] in which the speed ratio of the fifth speed of the automatic transmission 30 is set.
- the clutch C-1 or the clutch C-2 is the target element Jc [i] and the clutch C-3 and the brake B-1 are non-target elements, the clutch C-3 and the brake B-1 Since there is no gear stage formed by engagement, the gear ratios Tdiv1 [i] and Tdiv2 [i] are not set in the embodiment.
- the predetermined drag torque Tsref [i] at a predetermined time is set as the drag torque that is assumed to be generated by (step S140).
- the assumed drag torque Tsref [i] at a predetermined time is a gear ratio Tdiv1 [i], Tdiv2 [i], an input shaft torque Tin input to the input shaft 31 of the automatic transmission 30, and 3 Threshold braking torque defined as a boundary value for determining whether or not the two determination elements Jc [1] to Jc [3] are engaged and braking torque is acting on the output shaft 32 of the automatic transmission 30
- Tbref the following equation (1) is used for calculation.
- the input shaft torque Tin is positive in the direction in which the rotational speed of the input shaft 31 is increased (upward in FIG. 4), and the drag torque (target element Jc [i] generated by the engagement of the target element Jc [i].
- Formula (1) is a formula obtained by the following. Consider a case where the determination elements Jc [1] to Jc [3] are engaged. At this time, as shown in Expression (2), drag torque Ts [i generated by engagement of the target element Jc [i] when the three determination elements Jc [1] to Jc [3] are engaged.
- Equation (1) Is the torque obtained by subtracting the torque (Ts [i] ⁇ Tdiv2 [i]) converted from the output shaft 32 from the torque (Tin ⁇ Tdiv1 [i]) converted from the input shaft torque Tin into the output shaft 32 as the braking torque Tb. It is considered to act on the output shaft 32 of the automatic transmission 30. Therefore, by replacing “Tb” and “Ts [i]” in Equation (2) with “Tbref” and “Tsref [i]”, respectively, Equation (1) can be derived. Note that if the gear ratios Tdiv1 [i], Tdiv2 [i] are not set in the process of step S130 described above, the expected drag torque Tsref [i] at a predetermined time cannot be calculated by the equation (1). In the example, for the sake of convenience, the value 0 is set to the expected drag torque Tsref [i] at a predetermined time.
- Tsref [i] (Tin ⁇ Tdiv1 [i] -Tbref) / Tdiv2 [i] (1)
- Tb Tin ⁇ Tdiv1 [i] -Ts [i] ⁇ Tdiv2 [i] (2)
- the set expected drag torque Tsref [i] at a predetermined time is supplied to and discharged from the target linear solenoid valve corresponding to the target element Jc [i] among the linear solenoids 52 to 58 to the target element Jc [i]. And further converting the hydraulic pressure into a current applied to the solenoid of the target linear solenoid valve, whereby the three determination elements Jc [1] to Jc [3] are engaged and the output shaft 32 is engaged.
- a predetermined assumed current Iref [i] is set as a current assumed to be applied to the solenoid of the target linear solenoid valve when a braking torque is applied to (step S150).
- step S140 The processing in step S140 described above and the processing in step S150 take into account the gear ratios Tdiv1 [i], Tdiv2 [i] and the input shaft torque Tin in the combination of the three determination elements Jc [1] to Jc [3]. Then, the threshold braking torque Tbref is converted (converted) into the assumed drag torque Tsref [i] at the predetermined time, and the assumed drag torque Tsref [i] at the predetermined time is converted (converted) into the assumed current current Iref [i]. Become. Note that when the assumed drag torque Tsref [i] at the predetermined time is 0, the value 0 is set to the predetermined assumed current Iref [i].
- step S160 when the predetermined expected current Iref [i] is set, it is determined whether or not the variable i is equal to the value 3 (the number of determination elements Jc [1] to Jc [3]) (step S160). When it is determined that the value is less than 3, the variable i is incremented (step S170), and the process returns to step S120.
- linear solenoid valves corresponding to the determination elements Jc [1] to Jc [3] among the linear solenoid valves 52 to 58 hereinafter referred to as determination linear solenoid valves). Jv [1] to Jv [3]) are set at a predetermined expected current Iref [1] to Iref [3].
- step S160 If it is determined in step S160 that the variable i is equal to the value 3, the determination linear solenoid valves Jv [1] to Jv [3] out of the currents (actual currents) Ic1 to Ib1 from the current sensors 52a to 58a.
- the currents corresponding to the solenoids are input as determination currents Ij [1] to Ij [3] (step S180), the counter 0 is set to the initial value 0, and the variable i is set to the value 1 (
- step S190 the determination current Ij [i] is compared with the predetermined assumed current Iref [i] (step S200).
- step S210 When the determination current Ij [i] is equal to or greater than the predetermined assumption current Iref [i], the counter C Is incremented (step S210), and the counter C is held when the determination current Ij [i] is less than the predetermined current Iref [i]. Then, it is determined whether or not the variable i is equal to the value 3 (the number of determination currents Ij [1] to Ij [3]) (step S220). When the variable i is determined to be less than 3, the variable i Is incremented (step S230), and the process returns to step S200.
- the determination currents Ij [1] to Ij [3] are compared with the corresponding predetermined estimated currents Iref [1] to Iref [3], respectively.
- the number of currents for determination that are equal to or higher than the corresponding predetermined assumed currents Iref [1] to Iref [3] is counted.
- step S240 it is determined whether or not the counter C is equal to the value 3 (step S240).
- three of the clutches C-1 to C-3 and the brake B-1 are set as the determination elements Jc [1] to Jc [3]. Brake is applied to the output shaft 32 of the automatic transmission 30 when two of the clutches C-1 to C-3 and the brake B-1 are engaged to form any of the second to sixth gears.
- the counter C When the determination elements Jc [1] to Jc [3] are set, the counter C is considered to have a value of 3 when the process of step S240 is executed, and the clutches C-1 to C-3 and the brake B When the determination element Jc [1] to Jc [3] is set to two engaged and released one of ⁇ 1, the counter C is set to the value 3 when the process of step S240 is executed. It is thought that it is less than. It should be noted that the combination of the clutches C-1, C-3 and the brake B-1 or the combination of the clutches C-2, C-3 and the brake B-1 includes three determination elements Jc [1] to Jc [3].
- the assumed current Iref [i] is set to a value 0, so that the clutch C-1 or the clutch C- In comparison between the judgment current Ij [i] corresponding to 2 and the predetermined assumed current Iref [i] (value 0), the counter C regardless of whether the clutch C-1 or the clutch C-2 is engaged. Will be incremented. However, in the case of these combinations, since there is no gear stage formed by the engagement of the clutch C-3 and the brake B-1, no braking torque is generated on the output shaft 32 of the automatic transmission 30 (rotation prohibited) When not in an abnormal state), it is considered that the counter C does not become the value 3 when the process of step S240 is executed. That is, when the hydraulic circuit 50, the transmission ECU 80, the signal transmission system between the hydraulic circuit 50 and the transmission ECU 80, etc. are normal, braking torque is generated on the output shaft 32 of the automatic transmission 30 (rotation prohibition abnormal state). ).
- step S240 When it is determined in step S240 that the counter C is equal to the value 3, it is determined that braking torque is generated on the output shaft 32 of the automatic transmission 30 (rotation prohibition abnormal state) (step S250), and the linear solenoid valve 52 is determined. Application of current to all of the solenoids 52s to 58s of .about.58 is stopped (step S260), and this routine is terminated.
- each of the determination currents Ij [1] to Ij [3] is compared with the corresponding predetermined assumed currents Iref [1] to Iref [3], and the determination currents Ij [1] to Ij [ 3] is determined that the braking torque is generated on the output shaft 32 of the automatic transmission 30 (the rotation prohibition is in an abnormal state) when the predetermined currents Iref [1] to Iref [3] which are all correspond to As compared with what determines whether braking torque generate
- the currents (actual currents) Ic1 to Ib1 from the current sensors 52a to 58a are determined as the judgment current Ij.
- the transmission ratios Tdiv1 [1] to Tdiv1 [3] and Tdiv2 [1] to Tdiv2 [3] are set and used as threshold values.
- Predetermined expected drag torques Tsref [1] to Tsref [3] corresponding to the braking torque Tbref are set, and converted into currents to set the predetermined expected currents Iref [1] to Iref [3]. Assumed currents Iref [1] to Iref [3] can be set more appropriately.
- step S245 when the counter C is less than 3 in step S240, it is determined that the braking torque is not generated on the output shaft 32 of the automatic transmission 30 (not in the rotation prohibition abnormal state) (step S245), the process returns to step S100, and the clutch C -1 to C-3 and the brake B-1 are set to three judgment elements Jc [1] to Jc [3] different from the previous one (step S100), and the processes after step S110 are executed. .
- step S100 as described above, the combination is changed and three determination elements Jc [1] to Jc [3] are set.
- the current applied to each of the solenoids for determination linear solenoid valves Jv [1] to Jv [3] among the linear solenoid valves 52 to 58 is determined.
- Ij [1] to Ij [3] are used to determine whether braking torque is generated on the output shaft 32 of the automatic transmission 30 (a signal between the hydraulic circuit 50, the transmission ECU 80, and the hydraulic circuit 50 and the transmission ECU 80). It is determined whether or not there is an abnormality in the transmission system and the rotation prohibition abnormality state where three of the clutches C-1 to C-3 and the brake B-1 are engaged.
- the current command values to be applied to the solenoids of the valves Jv [1] to Jv [3] are used as the determination currents Ij [1] to Ij [3] to brake the output shaft 32 of the automatic transmission 30. Compared to what torque to determine whether occurring, (it is possible to suppress erroneous determination) which more properly can perform the determination.
- three of the clutches C-1 to C-3 and the brake B-1 are set as the determination elements Jc [1] to Jc [3], and the set 3 Based on the combination of the two determination elements Jc [1] to Jc [3], predetermined currents Iref [1] to Iref [3] are set, and the determination element Jc [1] among the linear solenoid valves 52 to 58 is set. Currents applied to the solenoids of the determination linear solenoid valves Jv [1] to Jv [3] corresponding to Jc [3] are determined as determination currents Ij [1] to Ij [3].
- braking torque is generated on the output shaft 32 of the automatic transmission 30 by comparing Ij [1] to Ij [3] with the corresponding predetermined estimated currents Iref [1] to Iref [3]. (It becomes a rotation prohibition abnormal state. Therefore, it is determined whether braking torque is generated on the output shaft 32 of the automatic transmission 30 by comparing the sum of the determination currents Ij [1] to Ij [3] with a threshold value. The determination can be performed more appropriately than the one (error determination can be suppressed).
- the expected drag torque Tsref [i] at a predetermined time of the target element Jc [i] is converted into a hydraulic pressure that is supplied to and discharged from the target linear solenoid valve to the target element Jc [i].
- the predetermined current Iref [i] is set by converting the hydraulic pressure into a current applied to the solenoid of the target linear solenoid valve, but the predetermined drag torque Tsref [i] at the predetermined time of the target element Jc [i].
- the assumed current Iref [i] may be set at a predetermined time by directly converting the current into current.
- the expected drag torque Tsref [i] at a predetermined time of the target element Jc [i] is set and set based on the input shaft torque Tin and the transmission ratios Tdiv1 [i] and Tdiv2 [i].
- the predetermined expected pulling torque Tsref [i] is converted into a current to set the predetermined assumed current Iref [i].
- the predetermined current Iref [i] is directly set based on the input shaft torque Tin, the gear ratios Tdiv1 [i], Tdiv2 [i], and the like. It is good to do.
- the braking torque generation determination routine of FIG. 9 is started when the system is started up, and basically the processes of steps S100 to S245 are repeatedly executed (automatic transmission).
- 30 is repeatedly determined whether or not braking torque is generated on the output shaft 32), but fast fill is being performed on the engagement side element for changing the gear position of the automatic transmission 30 (FIG. 8).
- the time t1 to t2) may not be executed.
- the actual hydraulic pressure for the engagement side element does not become so high, but the actual current flowing through the solenoid of the linear solenoid valve corresponding to the engagement side element also increases.
- the actual current flowing through the solenoid may also be greater than the current threshold.
- the transmission ECU 80 is provided with the current monitor circuit 82 that monitors the currents (actual currents) Ic1 to Ic3 and Ib1 (see FIG. 6) from the current sensors 52a to 58a.
- a control device other than the transmission ECU 80 for example, an engine ECU 16 that controls the engine 12 may be provided.
- the current sensor itself may be provided with calculation means for calculating the actual current, and the calculated result (actual current value) may be transmitted to the current monitor circuit 82.
- the predetermined assumed currents Iref [1] to Iref [3] have different values (predicted drag at predetermined times) for the solenoids of the determination linear solenoid valves Jv [1] to Jv [3]. Torque Tsref [1] to Tsref [3]) is used, but the same value may be used for each of the solenoids for determination linear solenoid valves Jv [1] to Jv [3]. .
- determination currents Ij [1] to Ij [3] as currents applied to the solenoids of the determination linear solenoid valves Jv [1] to Jv [3] are determined. Braking the output shaft 32 of the automatic transmission 30 by comparing predetermined currents Iref [1] to Iref [3] corresponding to the solenoids of the linear solenoid valves Jv [1] to Jv [3]. Although it is determined whether or not torque is generated, the braking torque is applied to the output shaft 32 of the automatic transmission 30 by comparing the sum of the determination currents Ij [1] to Ij [3] with the current threshold value. It is good also as what determines whether it generate
- the linear solenoid valves 52 to 58 of the hydraulic circuit 50 are all configured as a normally closed type, but may be configured as a normally open type, A part may be configured as a normally closed type and the remainder may be configured as a normally open type.
- the linear solenoid valves (determination linear solenoid valves) Jv [1] to Jv [3] corresponding to the three determination elements Jc [1] to Jc [3] among the linear solenoid valves 52 to 58 are all normal.
- When configured as an open type if it is determined that braking torque is generated on the output shaft 32 of the automatic transmission 30 when all of the determination currents Ij [1] to Ij [3] are equal to or less than the corresponding current threshold values.
- the solenoid of the normally closed type solenoid valve is used. It may be determined that the braking torque is generated on the output shaft 32 of the automatic transmission 30 when the current for determination is equal to or greater than the current threshold and the current for determination of the solenoid of the normally open solenoid valve is equal to or smaller than the current threshold.
- the automatic transmission device 20 includes an automatic transmission 30 that forms a plurality of shift stages by engaging two engagement elements (clutch and brake), and three (required for forming the shift stage). It is determined whether or not braking torque is generated on the output shaft 32 of the automatic transmission 30 by engaging the number of engaging elements that is larger by 1 than the number of engaging elements. Braking torque is applied to the output shaft 32 of the automatic transmission 30 by engaging four or more engagement elements (numbers greater than or equal to 2 and greater than or equal to the number of solenoid valves). It is good also as what determines whether or not the above occurs.
- the three clutches C-1 to C-3 and the two brakes B-1 and B-2 are all configured as a friction clutch and a friction brake.
- the clutch (brake) of the part may be configured as a dog clutch (dog brake) instead of the friction clutch (friction brake).
- the automatic transmission 30 is configured to shift at six speeds for forward movement by engaging two engagement elements (clutch and brake). It is good also as what is comprised so that it may change in multiple steps
- n1 engagement elements When n1 engagement elements are engaged by the hydraulic pressure of n1 (2 ⁇ n1 ⁇ m) solenoid valves among m (m ⁇ 3) solenoid valves to form a plurality of shift stages, n2 ( It is only necessary to determine whether or not braking torque is generated on the output shaft 32 of the automatic transmission 30 by comparing the actual current value flowing through each solenoid valve of the solenoid valve of n1 ⁇ n2 ⁇ m) with a current threshold value. .
- FIG. 10 is a configuration diagram showing an outline of the configuration of a modified automatic transmission 110 that shifts at 10 speeds for forward movement by engaging three engagement elements (clutch and brake).
- surface of the automatic transmission 110 of this modification is shown.
- An automatic transmission 110 shown in FIG. 10 includes an input shaft 114 connected to the engine side, a speed reduction double planetary gear 115, a speed change double planetary gear 116, an output shaft 117 connected to the drive wheel side, and clutches C-1, C-. 2, C-3, C-4, C-5, C-6, brakes B-1, B-2, a one-way clutch F-1, and the like.
- the double planetary gear for deceleration 115 includes a reduction common carrier C0C1 that rotatably supports the long pinion 120 and the pinion 121 that mesh with each other, a first sun gear S0 that meshes with the long pinion 120, and a second sun gear S1 that meshes with the pinion 121. And a reduction common ring gear R0R1 meshing with the long pinion 120.
- the shift type planetary gear 116 includes a shift common carrier C2C3 that rotatably supports the long pinion 124 and the pinion 125 that mesh with each other, a third sun gear S2 that meshes with the long pinion 124, and a fourth sun gear S3 that meshes with the pinion 125.
- the first sun gear S0 can be connected to the input shaft 114 via the clutch C-5, and the second sun gear S1 is fixed to the transmission case 112.
- the deceleration common carrier C0C1 can be connected to the input shaft 114 via the clutch C-6.
- the third sun gear S2 of the transmission-use planetary gear 116 is selectively coupled to the reduction common carrier C0C1 of the reduction-use planetary gear 115 via the clutch C-4, and is selectively connected to the reduction common ring gear R0R1 via the clutch C-3. And selectively fixed via the brake B-1.
- the transmission common carrier C2C3 is selectively connected to the input shaft 114 via the clutch C-2, is selectively fixed via the brake B-2, and is arranged in parallel with the brake B-2. It is connected to the transmission case 112 via the clutch F-1 to prevent reverse rotation.
- the fourth sun gear S3 is selectively coupled to the reduction common ring gear R0R1 via the clutch C-1.
- the transmission common ring gear R2R3 is directly connected to the output shaft 117.
- the automatic transmission 110 configured as described above selectively engages the clutches C-1 to C-6, selectively engages the brakes B-1 and B-2, the input shaft 114, the output By selectively connecting or fixing the components of the shaft 117, the speed reduction compound planetary gear 115, and the speed change compound planetary gear 116, it is possible to establish a shift speed of 10 forward speeds and 4 reverse speeds.
- ⁇ is added to the columns corresponding to the respective gear speeds of the clutches C-1 to C-6, the brakes B-1, B-2, and the one-way clutch F-1, If it is, it indicates that it is engaged and connected, and if it is a brake, it indicates that it is engaged and fixed.
- “( ⁇ )” the hydraulic pressure is supplied in preparation for the shift so that the shift is performed smoothly, but the clutch is not transmitting torque.
- “ ⁇ ” is attached, the brake is engaged when the engine brake is applied.
- n1 solenoid valves (2 ⁇ n1 ⁇ m) correspond to the solenoid valves of clutches C-1, C-2, and C-6
- n2 (n1 ⁇ n2 ⁇ m) correspond to clutches C-1, This corresponds to the solenoid valve for C-2, C-6, and brake B-1.
- the 6-speed automatic transmission 30 is used.
- a 3-speed, 4-speed, 5-speed automatic transmission may be used, and a 7-speed, 8-speed or higher speed may be used.
- An automatic transmission may be used.
- the present invention is applied to the form of the automatic transmission 20, but may be a form of an abnormality determination method for the hydraulic circuit 50 of the automatic transmission 20.
- a transmission ECU 80 as a transmission control device may be used, or a transmission braking torque generation determination method for determining whether or not a braking torque is generated on the output shaft of the transmission may be used.
- the current sensors 52a to 58a correspond to “actual current detection means”
- the transmission ECU 80 that executes the braking torque generation determination routine of FIG. 9 corresponds to “determination means”.
- the present invention can be used in the manufacturing industry of automatic transmissions.
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Abstract
Description
m個(m≧3)のソレノイドバルブが設けられ、該m個のソレノイドバルブのうちn1個(2≦n1<m)のソレノイドバルブの油圧によって該n1個の係合要素が係合されて複数の変速段を達成する変速機の制御装置であって、
前記m個のソレノイドバルブのソレノイドの各々に流れている実電流値を検出する実電流値検出手段と、
n2個(n1<n2≦m)のソレノイドバルブのソレノイドの前記検出された実電流値と電流閾値とを比較することにより前記変速機の出力軸に制動トルクが発生するか否かを判定する判定手段と、
を備えることを要旨とする。
m個(m≧3)のソレノイドバルブが設けられ、該m個のソレノイドバルブのうちn1個(2≦n1<m)のソレノイドバルブの油圧によって該n1個の係合要素が係合されて複数の変速段を達成する変速機の出力軸に制動トルクが発生するか否かを判定する変速機の制動トルク発生判定方法であって、
(a)前記m個のソレノイドバルブのソレノイドの各々に流れている実電流値を検出するステップと、
(b)n2個(n1<n2≦m)のソレノイドバルブのソレノイドの前記検出された実電流値と電流閾値とを比較することにより前記変速機の出力軸に制動トルクが発生するか否かを判定するステップと、
を含むことを要旨とする。
3つ以上の摩擦係合要素と、各摩擦係合要素に対応するソレノイドバルブにて前記各摩擦係合要素に作動流体を給排する油圧回路とを備え、前記3つ以上の摩擦係合要素のうち組み合わせの異なる2つの摩擦係合要素を係合することによって複数の変速段を実現する自動変速装置であって、
前記3つ以上の摩擦係合要素のうち3つの摩擦係合要素を前記油圧回路に異常が生じているか否かの判定に用いる判定用要素として設定する判定用要素設定手段と、
前記設定された3つの判定用要素に対応する3つのソレノイドバルブの各々に対して、前記設定された3つの判定用要素の組み合わせに基づいて、前記設定された3つの判定用要素が係合されて前記変速機の出力軸に制動トルクが作用する際に印加されていると想定される下限の電流としての所定時想定電流を設定する所定時想定電流設定手段と、
前記設定された3つの判定用要素に対応する3つのソレノイドバルブの各々に印加されている電流が、各々に対応する前記設定された所定時想定電流以上のとき、前記油圧回路に異常が生じていると判定する異常判定手段と、
を備えることを要旨とする。
3つ以上の摩擦係合要素と、各摩擦係合要素に対応するソレノイドバルブにて前記各摩擦係合要素に作動流体を給排する油圧回路とを備え、前記3つ以上の摩擦係合要素のうち組み合わせの異なる2つの摩擦係合要素を係合することによって複数の変速段を実現する自動変速装置における油圧回路の異常判定方法であって、
(a)前記3つ以上の摩擦係合要素のうち3つの摩擦係合要素を前記油圧回路に異常が生じているか否かの判定に用いる判定用要素として設定し、
(b)前記設定された3つの判定用要素に対応する3つのソレノイドバルブの各々に対して、前記設定された3つの判定用要素の組み合わせに基づいて、前記設定された3つの判定用要素が係合されて前記変速機の出力軸に制動トルクが作用する際に印加されていると想定される下限の電流としての所定時想定電流を設定し、
(c)前記設定された3つの判定用要素に対応する3つのソレノイドバルブの各々に印加されている電流が、各々に対応する前記設定された所定時想定電流以上のとき、前記油圧回路に異常が生じていると判定する、
ことを要旨とする。
Tb=Tin・Tdiv1[i]-Ts[i]・Tdiv2[i] (2)
Claims (6)
- m個(m≧3)のソレノイドバルブが設けられ、該m個のソレノイドバルブのうちn1個(2≦n1<m)のソレノイドバルブの油圧によって該n1個の係合要素が係合されて複数の変速段を達成する変速機の制御装置であって、
前記m個のソレノイドバルブのソレノイドの各々に流れている実電流値を検出する実電流値検出手段と、
n2個(n1<n2≦m)のソレノイドバルブのソレノイドの前記検出された実電流値と電流閾値とを比較することにより前記変速機の出力軸に制動トルクが発生するか否かを判定する判定手段と、
を備える変速機の制御装置。 - 請求項1記載の変速機の制御装置であって、
前記判定手段は、前記変速機の変速段の変更のためのファストフィルの実行中は、前記変速機の出力軸に制動トルクが発生するか否かを判定しない手段である、
変速機の制御装置。 - 請求項1または2記載の変速機の制御装置であって、
前記判定手段は、前記n2個のノーマルクローズ型のソレノイドバルブのソレノイドの前記検出された実電流値が前記電流閾値以上のとき、前記変速機の出力軸に制動トルクが発生すると判定する手段である、
変速機の制御装置。 - 請求項1または2記載の変速機の制御装置であって、
前記判定手段は、前記n2個のノーマルオープン型のソレノイドバルブのソレノイドの前記検出された実電流値が前記電流閾値以下のとき、前記変速機の出力軸に制動トルクが発生すると判定する手段である、
変速機の制御装置。 - 請求項1または2記載の変速機の制御装置であって、
前記判定手段は、前記n2個のソレノイドバルブのうちノーマルクローズ型のソレノイドバルブのソレノイドの前記検出された実電流値が前記電流閾値以上で且つ前記n2個のソレノイドバルブのうちノーマルオープン型のソレノイドバルブのソレノイドの前記検出された実電流値が前記電流閾値以下のとき、前記変速機の出力軸に制動トルクが発生すると判定する手段である、
変速機の制御装置。 - m個(m≧3)のソレノイドバルブが設けられ、該m個のソレノイドバルブのうちn1個(2≦n1<m)のソレノイドバルブの油圧によって該n1個の係合要素が係合されて複数の変速段を達成する変速機の出力軸に制動トルクが発生するか否かを判定する変速機の制動トルク発生判定方法であって、
(a)前記m個のソレノイドバルブのソレノイドの各々に流れている実電流値を検出するステップと、
(b)n2個(n1<n2≦m)のソレノイドバルブのソレノイドの前記検出された実電流値と電流閾値とを比較することにより前記変速機の出力軸に制動トルクが発生するか否かを判定するステップと、
を含む変速機の制動トルク発生判定方法。
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US13/984,142 US9174630B2 (en) | 2011-03-31 | 2012-03-30 | Control device for transmission and braking torque generation determination method for transmission |
JP2013507786A JP5768875B2 (ja) | 2011-03-31 | 2012-03-30 | 変速機の制御装置および変速機の制動トルク発生判定方法 |
KR1020137021511A KR101545070B1 (ko) | 2011-03-31 | 2012-03-30 | 변속기의 제어 장치 및 변속기의 제동 토크 발생 판정 방법 |
EP12763084.6A EP2647884B1 (en) | 2011-03-31 | 2012-03-30 | Transmission control device, and method for determining generation of braking torque in transmission |
CN201280009232.2A CN103392084B (zh) | 2011-03-31 | 2012-03-30 | 变速器的控制装置以及变速器的制动扭矩产生判断方法 |
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JP6551380B2 (ja) * | 2016-12-16 | 2019-07-31 | トヨタ自動車株式会社 | 車両の制御装置 |
KR102389131B1 (ko) * | 2017-06-15 | 2022-04-21 | 현대자동차주식회사 | 변속기 인터락 방지방법 |
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JP6922095B2 (ja) * | 2018-08-07 | 2021-08-18 | ジヤトコ株式会社 | 自動変速機の制御装置 |
CN112065980A (zh) * | 2020-08-26 | 2020-12-11 | 北京汽车集团越野车有限公司 | 一种扭矩控制方法、装置及车辆 |
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