JP2018021577A - Hydraulic control device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic control device capable of preventing reduction in fuel consumption of a vehicle even when a hydraulic sensor fails, and to provide a program.SOLUTION: A hydraulic control device 10 controls the oil pressure of operating oil supplied to an automatic transmission TM via a magnetic valve V by controlling driving current of the magnetic valve V, includes: a hydraulic sensor PS measuring the oil pressure of the operating oil; a hydraulic sensor failure determination part 110 to which output of the hydraulic sensor is supplied to determine a failure of the hydraulic sensor; and a driving current calculation part 120 calculating the driving current. The driving current calculation part calculates driving current on the basis of the measured oil pressure of the operating oil measured by the hydraulic sensor when the hydraulic sensor failure determination part determines that the hydraulic sensor is not in failure, the driving current is calculated on the basis of oil pressure characteristic data showing a relation between the driving current of each of magnetic valve products and the oil pressure of the operating oil when the hydraulic sensor failure determination part determines that the hydraulic sensor is in failure.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hydraulic control device and a program.

  Conventionally, a control device for an in-vehicle automatic transmission that controls a gear ratio by controlling hydraulic pressure of hydraulic oil supplied to a primary pulley and a secondary pulley has been proposed. If the hydraulic pressure of the hydraulic oil supplied to the pulley is too high, the friction of the belt wound between the pulleys may increase, and the fuel efficiency of the vehicle may decrease. Therefore, in order to improve the fuel consumption of the vehicle, it is desirable that the control device controls the hydraulic pressure of the hydraulic oil by reducing the hydraulic pressure to such an extent that the belt does not slip. Conventionally, for example, as shown in Patent Document 1, a technique for reducing the hydraulic pressure of hydraulic fluid by performing hydraulic pressure feedback control using a pressure sensor has been proposed.

JP2015-190487A

  In the conventional control device as described above, if the hydraulic pressure sensor fails, the hydraulic pressure cannot be feedback-controlled based on the output of the hydraulic pressure sensor, so the hydraulic pressure of the hydraulic oil is increased by a predetermined pressure. This predetermined pressure is a relatively high value in consideration of variations in hydraulic characteristics among individual solenoid valves that control the hydraulic pressure of hydraulic oil. Therefore, in the conventional control device, there is a problem that if the operation is continued as it is when the hydraulic pressure sensor fails, the fuel consumption of the vehicle is reduced.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a hydraulic control device and a program capable of suppressing a reduction in fuel consumption of a vehicle even when a hydraulic sensor fails.

  One aspect of the present invention is a hydraulic control device that controls the hydraulic pressure of hydraulic oil supplied to an automatic transmission via the electromagnetic valve by controlling a drive current of the electromagnetic valve. A hydraulic sensor that measures hydraulic pressure, an output of the hydraulic sensor, a hydraulic sensor failure determination unit that determines a failure of the hydraulic sensor, and a drive current calculation unit that calculates the drive current, and the drive A current calculation unit that calculates the drive current based on the measured hydraulic pressure of the hydraulic oil measured by the hydraulic sensor when the hydraulic sensor failure determination unit determines that the hydraulic sensor is not in a failure state; When the hydraulic sensor failure determination unit determines that the hydraulic sensor is in a failure state, a hydraulic characteristic data indicating a relationship between the drive current for each product of the solenoid valve and the hydraulic pressure of the hydraulic oil. Calculating the driving current based on data, it is a hydraulic control device.

  One aspect of the present invention is a vehicle-mounted state in a computer provided in a hydraulic control device that controls the hydraulic pressure of hydraulic fluid supplied to an automatic transmission via the electromagnetic valve by controlling the drive current of the electromagnetic valve. A drive current calculation step for calculating the drive current based on a measured hydraulic pressure of the hydraulic oil measured by the hydraulic sensor in step, a hydraulic sensor failure determination step for determining a failure of the hydraulic sensor, and a hydraulic sensor failure determination step When it is determined that the hydraulic pressure sensor is in a failure state, the drive current is corrected based on hydraulic characteristic data indicating the relationship between the drive current for each product of the solenoid valve and the hydraulic oil pressure. And a drive current correction step.

  According to one aspect of the present invention, there is provided a hydraulic control device and a program that can suppress a decrease in fuel consumption of a vehicle even when a hydraulic sensor fails.

It is a block diagram which shows an example of a structure of the hydraulic control apparatus of 1st Embodiment. It is a figure which shows an example of the hydraulic characteristic data of this embodiment. It is a figure which shows an example of operation | movement of the hydraulic control apparatus of this embodiment. It is a block diagram which shows an example of a structure of the hydraulic control apparatus of 2nd Embodiment. It is a figure which shows an example of the lower limit side oil pressure standard data of this embodiment. It is a figure which shows an example of operation | movement of the hydraulic control apparatus of this embodiment. It is a figure which shows an example of the relationship between the drive current of this embodiment, and the hydraulic pressure of hydraulic fluid.

[First Embodiment]
Hereinafter, a hydraulic control apparatus according to a first embodiment of the present invention will be described with reference to the drawings. The scope of the present invention is not limited to the following embodiments, and can be arbitrarily changed within the scope of the technical idea of the present invention.

  FIG. 1 is a block diagram illustrating an example of a configuration of a hydraulic control device 10 according to the present embodiment. The hydraulic control device 10 supplies hydraulic pressure to the automatic transmission TM of the vehicle based on a shift command from the host unit 20.

[Outline of automatic transmission TM]
The automatic transmission TM includes a primary pulley PP, a secondary pulley SP, and a belt VT. A rotational force output from a prime mover (not shown) is transmitted to the primary pulley PP. The belt VT is wound between the primary pulley PP and the secondary pulley SP, and transmits the rotational force transmitted to the primary pulley PP to the secondary pulley SP. The secondary pulley SP transmits the rotational force transmitted from the belt VT to a vehicle wheel (not shown) via a rotational force transmission mechanism (not shown).

Both the primary pulley PP and the secondary pulley SP have a variable pulley width.
Specifically, the primary pulley PP includes a fixed primary pulley PP1 and a movable primary pulley PP2. As the movable primary pulley PP2 moves in the direction of the rotation axis of the pulley, the pulley width of the primary pulley PP changes.
The surface on which the belt VT of these pulleys is wound is conical. In the state where the pulley width is wide, the belt VT contacts the inner peripheral portion of the pulley. In the state where the pulley width is narrow, the belt VT contacts the outer peripheral portion of the pulley. The reduction gear ratio is changed by changing the pulley width of the primary pulley PP and the pulley width of the secondary pulley SP. Specifically, when the pulley width of the primary pulley PP is widened and the pulley width of the secondary pulley SP is narrowed, the reduction ratio is increased. Conversely, if the pulley width of the primary pulley PP is narrowed and the pulley width of the secondary pulley SP is widened, the reduction gear ratio becomes small.

  Each of the primary pulley PP and the secondary pulley SP includes an oil chamber (not shown). The positions of these pulleys in the direction of the rotation axis of the pulleys are determined by the amount of hydraulic oil present in the oil chamber. These pulleys move in the direction in which the pulley width increases as the amount of hydraulic oil present in the oil chamber increases, and move in the direction in which the pulley width decreases as the amount of hydraulic oil decreases. Conversely, these pulleys may move in a direction in which the pulley width decreases as the amount of hydraulic oil present in the oil chamber increases, and may move in a direction in which the pulley width increases as the amount of hydraulic oil decreases. .

  The primary pulley PP and the secondary pulley SP are applied with a force acting in the direction of increasing the pulley width from the belt VT due to the tension of the belt VT. The primary pulley PP and the secondary pulley SP are supplied with hydraulic oil pressurized to a predetermined pressure in order to resist this force. In the following description, this predetermined pressure is also referred to as supply pressure. The setting range of the supply pressure is about 4 to 5 [Mpa] in the example of the present embodiment. That is, the hydraulic oil pressurized to about 4 to 5 [Mpa] is supplied to the primary pulley PP and the secondary pulley SP.

[Overview of Hydraulic Supply Unit 30]
The hydraulic pressure supply unit 30 includes an oil pan OP, an oil pump P, a solenoid valve V, and a hydraulic pressure sensor PS, and supplies the hydraulic oil OIL pressurized by the oil pump P to the automatic transmission TM.
The oil pump P is provided between the hydraulic oil pipe HP1 and the hydraulic oil pipe HP2, and sucks up the hydraulic oil OIL stored in the oil pan OP via the hydraulic oil pipe HP1 to the hydraulic oil pipe HP2. Discharge. That is, the oil pump P moves the hydraulic oil in the direction of arrow A in the drawing. The oil pump P is, for example, an electric pump or a pump that is rotated by the rotational force of the engine. When the oil pump P is an electric pump, it operates based on control by a control unit (not shown).
The solenoid valve V is provided between the hydraulic oil pipe HP2 and the hydraulic oil pipe HP3. The solenoid valve V includes a solenoid SL. The electromagnetic valve V changes the valve opening according to the magnitude of the drive current I supplied to the solenoid SL. In an example of this embodiment, when the drive current I is larger, the solenoid valve V makes the valve opening smaller. Further, when the drive current I is smaller, the solenoid valve V increases the valve opening degree. The solenoid valve V operates to be supplied to the automatic transmission TM by increasing / decreasing the valve opening and increasing / decreasing the amount of hydraulic oil OIL pressurized by the oil pump P in the direction of arrow B in the figure. The supply pressure of the oil OIL is controlled. That is, the electromagnetic valve V functions as a supply pressure control valve for the hydraulic oil OIL supplied to the automatic transmission TM.
The hydraulic pressure sensor PS is provided between the hydraulic oil pipe HP3 and the hydraulic oil pipe HP4, and detects the hydraulic pressure of the hydraulic oil OIL supplied to the automatic transmission TM, that is, the supply pressure. The hydraulic pressure sensor PS outputs the detected pressure to the hydraulic pressure control device 10 as a measured hydraulic pressure signal SOP.

  The hydraulic pressure supply unit 30 may include an accumulator ACC. The accumulator ACC stores hydraulic oil OIL to which the hydraulic pressure generated by the oil pump P is attached. By providing the accumulator ACC, the hydraulic pressure supply unit 30 can reduce oil pressure pulsation and surge due to the operation of the oil pump P. Further, the hydraulic pressure supply unit 30 includes the accumulator ACC, and can apply pressure to the hydraulic oil OIL in a state where the oil pump P is stopped.

  Hereinafter, the control of the hydraulic oil supply pressure by the hydraulic control device 10 will be described. Note that description of which of the primary pulley PP and the secondary pulley SP is supplied with the hydraulic oil OIL, that is, control of the transmission ratio, is omitted.

[Configuration of Hydraulic Control Device 10]
The configuration of the hydraulic control device 10 will be described. The hydraulic control device 10 includes a calculation unit 100 and a storage unit 200. The input side of the hydraulic control device 10 is connected to the host unit 20 and the hydraulic sensor PS. The output side of the hydraulic control device 10 is connected to the solenoid SL of the electromagnetic valve V.
The hydraulic control device 10 may control the discharge hydraulic pressure by controlling the rotation speed of the oil pump P. Description of the control of the discharge hydraulic pressure of the oil pump P by the hydraulic control device 10 will be omitted. Hereinafter, the case where the discharge hydraulic pressure of the oil pump P is constant will be described.

  The storage unit 200 includes a hydraulic characteristic data storage unit 210. The hydraulic characteristic data storage unit 210 stores hydraulic characteristic data DIP. An example of the hydraulic characteristic data DIP will be described with reference to FIG.

  FIG. 2 is a diagram illustrating an example of the hydraulic characteristic data DIP of the present embodiment. The hydraulic characteristic data storage unit 210 associates the current value of the drive current I that drives the solenoid SL of the solenoid valve V with the supply pressure of the hydraulic oil OIL when the drive current I is supplied, and associates the hydraulic characteristic. It is stored as data DIP. The hydraulic characteristic data DIP indicates the relationship between the drive current I for each product of the solenoid valve V and the supply pressure of the hydraulic oil OIL. That is, the hydraulic characteristic data DIP indicates the drive current-hydraulic characteristic for each product of the solenoid valve V. In the following description, the drive current-hydraulic characteristic of the electromagnetic valve V is also simply referred to as “hydraulic characteristic of the electromagnetic valve V”.

  Here, the hydraulic characteristic of the electromagnetic valve V stored in the hydraulic characteristic data DIP may be a hydraulic characteristic measured in the initial use state of the electromagnetic valve V. In this case, the hydraulic pressure characteristic data DIP is data indicating the relationship between the drive current I measured for each electromagnetic valve V and the hydraulic pressure of the hydraulic oil OIL in the initial use state of the electromagnetic valve V. The hydraulic characteristic of the solenoid valve V stored in the hydraulic characteristic data DIP can be measured in a shipping inspection or the like at the time of factory shipment of the solenoid valve V. In the case of measurement at the shipping inspection of the solenoid valve V, measurement by a standardized procedure is possible, and accurate hydraulic characteristic data DIP is obtained.

  As a specific example, the hydraulic characteristic data storage unit 210 stores drive current I = 200 [mA] and used initial hydraulic pressure PI = 4500 [kPa] as hydraulic characteristic data DIP in association with each other. . Further, in the hydraulic characteristic data storage unit 210, the driving current I = 600 [mA] and the used initial hydraulic pressure PI = 1500 [kPa], the driving current I = 800 [mA], and the used initial hydraulic pressure PI = 500 [kPa]. ], The drive current I = 1000 [mA] and the initial hydraulic pressure PI = 200 [kPa] are associated with each other and stored as hydraulic characteristic data DIP.

The initial use hydraulic pressure PI is an example of hydraulic characteristic data measured when the electromagnetic valve V is inspected. That is, the use initial hydraulic pressure PI is hydraulic characteristic data measured in the initial use state of the electromagnetic valve V such as a shipping inspection among the hydraulic characteristic data of the electromagnetic valve V. In the following description, the initial use hydraulic pressure PI is also referred to as an inspection measurement pressure _Pc .

The relationship between the drive current I of the solenoid valve V and the hydraulic pressure of the hydraulic oil OIL differs depending on the product of the solenoid valve V due to the dimensional error and assembly error of the solenoid valve V. The hydraulic characteristic data DIP is acquired for each product of the solenoid valve V.
The hydraulic characteristic data storage unit 210 is configured by a nonvolatile storage element capable of additionally writing information or rewriting information. In the factory inspection of the solenoid valve V, hydraulic characteristic data DIP is acquired for each product of the solenoid valve V. The acquired hydraulic characteristic data DIP is written in the hydraulic characteristic data storage unit 210 of the hydraulic control apparatus 10 that controls the solenoid valve V.

  Here, the solenoid valve V and the hydraulic control device 10 may be separately delivered to a vehicle assembly factory. In this case, of the plurality of electromagnetic valves V, which one of the electromagnetic valves V is combined with the hydraulic control device 10 depends on whether the electromagnetic valve V is assembled to the vehicle in the vehicle assembly process, This is determined by determining the individual control device 10. When the combination of the individual solenoid valve V and the individual hydraulic control apparatus 10 to be assembled in the vehicle is determined, the hydraulic characteristic data DIP to be stored in the hydraulic characteristic data storage unit 210 of the hydraulic control apparatus 10 is specified. .

  The hydraulic characteristic data DIP may be displayed on the exterior portion of the solenoid valve V. For example, the hydraulic characteristic data DIP is displayed by sticking a sticker indicating the hydraulic characteristic data DIP with a two-dimensional code on the exterior of the solenoid valve V, or the two-dimensional code is stamped on the exterior of the solenoid valve V. Is displayed. In this case, after determining the combination of the individual electromagnetic valve V and the individual hydraulic control device 10 assembled in the vehicle, the hydraulic characteristic data DIP of the individual is read by a scanner or the like. Further, the read hydraulic characteristic data DIP is written in the hydraulic characteristic data storage unit 210 of the hydraulic control device 10.

  Returning to FIG. 1, the calculation unit 100 includes a CPU (Central Processing Unit), and includes a hydraulic sensor failure determination unit 110 and a drive current calculation unit 120 as functional units.

  The output of the hydraulic sensor PS is supplied to the hydraulic sensor failure determination unit 110. The hydraulic sensor failure determination unit 110 determines a failure of the hydraulic sensor PS based on the supplied output of the hydraulic sensor PS. Here, the failure of the hydraulic sensor PS includes mechanical breakage of the hydraulic sensor PS and changes in electrical characteristics. The “output of the hydraulic pressure sensor PS” here is, for example, the measured hydraulic pressure signal SOP. The measured hydraulic pressure signal SOP is a signal having electrical characteristics corresponding to the hydraulic pressure detected by the hydraulic pressure sensor PS. The measured hydraulic pressure signal SOP has, for example, a potential, a current value, a duty ratio, or a frequency characteristic corresponding to the magnitude of the hydraulic pressure detected by the hydraulic pressure sensor PS. The hydraulic pressure sensor failure determination unit 110 determines the failure of the hydraulic pressure sensor PS by acquiring the measured hydraulic pressure signal SOP.

The hydraulic sensor failure determination unit 110 determines a failure of the hydraulic sensor PS based on a deviation between the target value TGT of the hydraulic pressure and the measured hydraulic pressure signal SOP measured by the hydraulic sensor PS. As an example, the hydraulic pressure sensor failure determination unit 110 determines the failure of the hydraulic pressure sensor PS based on whether or not the deviation between the target hydraulic pressure value TGT and the measured hydraulic pressure signal SOP output from the hydraulic pressure sensor PS is within a predetermined range. judge.
The hydraulic sensor failure determination unit 110 supplies the determined result to the drive current calculation unit 120 as failure presence / absence information DF.

  The drive current calculation unit 120 calculates the current value of the drive current I. In the following description, calculating the current value of the drive current I is also simply referred to as “calculating the drive current I”.

[Calculation procedure of drive current I (1)]
The drive current calculation unit 120 calculates the drive current I based on the target value TGT of the hydraulic pressure output from the host unit 20 and the measured hydraulic pressure signal SOP output from the hydraulic sensor PS. Specifically, the drive current calculation unit 120 acquires the target value TGT from the upper unit 20. The drive current calculation unit 120 acquires the measured hydraulic pressure signal SOP from the hydraulic pressure sensor PS. The drive current calculation unit 120 calculates a pressure deviation between the acquired target value TGT and the measured hydraulic pressure signal SOP. The drive current calculation unit 120 calculates a drive current deviation ΔI corresponding to the calculated pressure deviation. The drive current calculation unit 120 calculates a new current value of the drive current I based on the calculated drive current deviation ΔI and the current value of the drive current I. The drive current calculation unit 120 outputs the drive current I having the calculated current value to the solenoid SL of the solenoid valve V.
That is, the drive current calculation unit 120 performs so-called feedback control in which the drive current I is calculated based on the target value TGT and the measured hydraulic pressure signal SOP so that the measured hydraulic pressure signal SOP approaches the target value TGT.

[Calculation procedure of drive current I (2)]
The drive current calculation unit 120 calculates the drive current I based on the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210. Specifically, the drive current calculation unit 120 acquires the target value TGT from the upper unit 20. The drive current calculation unit 120 acquires the hydraulic characteristic data DIP from the hydraulic characteristic data storage unit 210. The drive current calculation unit 120 calculates the current value of the drive current I corresponding to the acquired target value TGT based on the graph of the hydraulic characteristic data DIP. The drive current calculation unit 120 outputs the drive current I having the calculated current value to the solenoid SL of the solenoid valve V.
That is, the drive current calculation unit 120 performs so-called open loop control in which the drive current I is calculated based on the target value TGT and the hydraulic pressure characteristic data DIP.

Here, the drive current calculation unit 120 changes the calculation procedure of the drive current I depending on whether or not the hydraulic sensor PS is out of order. Specifically, when the hydraulic pressure sensor PS is not in a failure state, the drive current calculation unit 120 performs the drive current I by the above-described calculation procedure (1), that is, by feedback control based on the target value TGT and the measured hydraulic pressure signal SOP. Is calculated.
Further, when the hydraulic pressure sensor PS is in a failure state, the driving current calculation unit 120 calculates the driving current I by the above-described calculation procedure (2), that is, by open loop control based on the target value TGT and the hydraulic characteristic data DIP. calculate.

[Operation of Hydraulic Control Device 10]
Next, the operation of the hydraulic control device 10 will be described with reference to FIG.
FIG. 3 is a diagram illustrating an example of the operation of the hydraulic control device 10 of the present embodiment.
(Step S <b> 10) The hydraulic control apparatus 10 acquires a target value TGT that is a hydraulic control target value from the host unit 20.
(Step S20) The hydraulic pressure control device 10 acquires a measured hydraulic pressure, that is, a measured hydraulic pressure signal SOP, from the hydraulic pressure sensor PS.
(Step S30) The drive current calculation unit 120 of the hydraulic control apparatus 10 calculates a deviation ΔP between the target value TGT acquired in Step S10 and the measured hydraulic pressure signal SOP acquired in Step S20.
(Step S40) The hydraulic pressure sensor failure determination unit 110 of the hydraulic control device 10 starts determining whether or not the hydraulic sensor PS has failed when the determination condition for whether or not the hydraulic sensor PS has failed is satisfied. Specifically, the hydraulic sensor failure determination unit 110 satisfies the determination condition for whether or not the hydraulic sensor PS has failed when a condition for causing a change in the measured hydraulic signal SOP output from the hydraulic sensor PS is satisfied. Is determined.
(Step S50) The hydraulic pressure sensor failure determination unit 110 estimates the measured hydraulic pressure signal SOP output from the hydraulic pressure sensor PS under the condition that the measured hydraulic pressure signal SOP changes when the determination of whether or not the hydraulic pressure sensor PS has failed is performed. The presence or absence of a failure of the hydraulic pressure sensor PS is determined based on the magnitude of the deviation ΔPME from the hydraulic pressure.
(Step S60) If the deviation ΔPME between the measured hydraulic pressure signal SOP and the estimated hydraulic pressure exceeds a predetermined value, the hydraulic pressure sensor failure determination unit 110 determines that “the hydraulic pressure sensor PS has failed” and the process proceeds to step S80. Proceed. If the deviation ΔPME is less than the predetermined value, the hydraulic sensor failure determination unit 110 determines “no failure of the hydraulic sensor PS” and advances the process to step S70.
(Step S70) When it is determined that “no failure of the hydraulic pressure sensor PS”, the drive current calculation unit 120 performs pressure control of the hydraulic oil OIL based on the measured hydraulic pressure signal SOP, that is, feedback control, and performs a series of operations. finish.
(Step S80) When it is determined that “the failure of the hydraulic pressure sensor PS is present”, the drive current calculation unit 120 performs pressure control of the hydraulic oil OIL that is not based on the measured hydraulic pressure signal SOP, that is, open loop control. Specifically, the drive current calculation unit 120 acquires the hydraulic characteristic data DIP from the hydraulic characteristic data storage unit 210. The drive current calculation unit 120 calculates a current value of the drive current I with respect to the target value TGT based on the acquired hydraulic characteristic data DIP and the target value TGT. The drive current calculation unit 120 supplies the drive current I having the calculated current value to the solenoid SL of the solenoid valve V.
(Step S90) The hydraulic control apparatus 10 outputs a signal indicating “the hydraulic sensor PS has a failure” to, for example, the upper unit 20, and ends the series of operations.

  As described above, when a failure occurs in the hydraulic pressure sensor PS, the drive current calculation unit 120 causes the electromagnetic valve V to be connected to the automatic transmission TM based on the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210. The supply pressure of the hydraulic oil OIL supplied to is controlled. That is, when a failure occurs in the hydraulic sensor PS, the hydraulic control device 10 according to the present embodiment controls the supply pressure of the hydraulic oil OIL based on the hydraulic characteristic data DIP acquired for each individual solenoid valve V. .

  In the prior art, when a failure occurs in the hydraulic sensor PS and hydraulic feedback control cannot be performed, open loop control may be performed on the supply pressure of the hydraulic oil OIL. When performing open loop control in this prior art, the hydraulic control considering the individual hydraulic characteristics of the solenoid valve V has not been performed. Therefore, in this prior art, when a failure occurs in the hydraulic pressure sensor PS, among the electromagnetic valves V having individual variations in hydraulic characteristics, the electromagnetic valve V having the lowest hydraulic characteristic, that is, the hydraulic characteristic of the lower limit standard product. In some cases, open-loop control was performed according to the situation. In this case, there is a problem that the supply pressure of the hydraulic oil OIL by the solenoid valve V that is not the standard lower limit product is higher than the supply pressure by the solenoid valve V of the standard lower limit product. For this reason, according to the prior art, when a failure occurs in the hydraulic pressure sensor PS, there is a problem in that the supply pressure is relatively high depending on the individual solenoid valve V, and it is impossible to suppress a reduction in fuel consumption of the vehicle.

  The hydraulic control apparatus 10 according to the present embodiment controls the supply pressure of the hydraulic oil OIL based on the hydraulic characteristic data DIP acquired for each individual solenoid valve V, so that the hydraulic control apparatus 10 according to the individual characteristics of the solenoid valve V is used. The supply pressure can be reduced to the lower limit pressure. That is, according to 10 of the present embodiment, when a failure occurs in the hydraulic pressure sensor PS, it is possible to suppress a decrease in fuel consumption of the vehicle.

[Second Embodiment]
Hereinafter, a hydraulic control apparatus according to a second embodiment of the present invention will be described with reference to the drawings. In addition, about the structure and operation | movement same as 1st Embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.
The hydraulic control apparatus 10-2 according to the present embodiment controls the hydraulic control according to the first embodiment described above in that the control is based on the “lower limit hydraulic standard value” in the open loop control of the hydraulic pressure of the hydraulic oil OIL. Different from the device 10.

FIG. 4 is a block diagram showing an example of the configuration of the hydraulic control device 10-2 of the present embodiment. The hydraulic control apparatus 10-2 includes a calculation unit 100-2 and a storage unit 200-2 instead of the calculation unit 100 and the storage unit 200 described above.
The calculation unit 100-2 includes a deviation calculation unit 130 in addition to the units included in the calculation unit 100 described above. The calculation unit 100-2 includes a drive current calculation unit 120-2 instead of the drive current calculation unit 120 described above. The storage unit 200-2 includes a lower limit hydraulic standard value storage unit 220 in addition to the units included in the storage unit 200 described above.

  The lower limit hydraulic pressure standard value storage unit 220 stores lower limit hydraulic pressure standard data DSP. An example of the lower limit hydraulic pressure standard data DSP will be described with reference to FIG.

FIG. 5 is a diagram showing an example of the lower limit side hydraulic standard data DSP of the present embodiment. The lower limit hydraulic standard value storage unit 220 stores the current value of the drive current I that drives the solenoid SL of the solenoid valve V, and the lower limit hydraulic standard value P of the hydraulic oil OIL when this drive current I is supplied. _s is associated with and stored as lower limit hydraulic pressure standard data DSP. Hydraulic standard data lower limit DSP shows the relationship between the hydraulic pressure of the lower-side oil pressure standard value P _s of the hydraulic oil OIL and the driving current I of the solenoid valve V.

Here, the lower limit oil pressure standard value P _s, a value which is managed as a design standard value of the solenoid valve V. This lower limit side hydraulic standard value P _s is the pressure of the hydraulic oil OIL supplied to the automatic transmission TM via the solenoid valve V when the drive current I having a predetermined current value is supplied to the solenoid valve V, that is, Indicates the lower limit of supply pressure.

As a specific example, the lower limit side hydraulic standard value storage unit 220 is associated with the lower limit side hydraulic standard by associating the drive current I = 200 [mA] with the lower limit side hydraulic standard value P _s = 4000 [kPa]. It is stored as data DSP. In the hydraulic characteristic data storage unit 210, the drive current I = 600 [mA] and the lower limit hydraulic standard value P _s = 1000 [kPa], and the drive current I = 800 [mA] and the lower limit hydraulic standard value P _s = 300 [kPa] is associated with the drive current I = 1000 [mA] and the lower limit hydraulic standard value P _s = 100 [kPa], and is stored as lower limit hydraulic standard data DSP. .

  The deviation calculating unit 130 calculates a deviation DSI between the lower limit hydraulic standard data DSP of the automatic transmission TM and the hydraulic characteristic data DIP. The deviation DSI calculated by the deviation calculation unit 130 will be described.

As described above, the hydraulic characteristic data DIP of the solenoid valve V is acquired for each individual solenoid valve V in a shipping inspection or the like at the assembly factory of the solenoid valve V. More specifically, when the driving current I ₁ is supplied, the supply pressure of the hydraulic oil OIL supplied from the electromagnetic valve V in the automatic transmission TM is measured as the test time measured pressure P _c1. The measured measurement pressure P _c1 at the time of inspection is recorded as hydraulic characteristic data DIP in association with the current value of the drive current I ₁ . Next, the driving current I ₁ driving current I ₂ the current value is different from the supply pressure of the hydraulic oil OIL is a driving current I ₂ is supplied from the electromagnetic valve V when it is supplied to the automatic transmission TM, testing It is measured as the _hourly measured pressure _Pc2 . Inspection during measurement pressure P _c2 which is measured is associated with the current value of the driving current I _2, is recorded as the hydraulic pressure characteristic data DIP.

Here, in such shipping inspection of the factory of the solenoid valve V, the solenoid valve V is supply pressure indicated by the hydraulic pressure characteristic data DIP is in the acceptance criterion that does not fall below the lower limit hydraulic pressure standard value P _s, the solenoid valve V Each individual is examined. More specifically, the solenoid valve V includes a lower limit hydraulic standard value P _s1 that is a lower limit value of the measurement pressure P _c1 at the time of inspection with respect to the drive current I ₁ and a lower limit of the measurement pressure P _c2 at the time of inspection with respect to the drive current I ₂ . A lower limit hydraulic pressure standard value P _s2, which is a value, is predetermined.
Depending on the individual solenoid valve V, when the drive current I ₁ having a predetermined current value is supplied, the supply pressure of the hydraulic oil OIL supplied to the automatic transmission TM may be lower than the lower limit hydraulic pressure standard value P _s1. . For example, an electromagnetic valve V assembled failure occurs, supply pressure of the hydraulic oil OIL is sometimes lower than the lower limit oil pressure standard value P _s. If the supply pressure of the hydraulic oil OIL supplied from the electromagnetic valve V in the automatic transmission TM is less than the lower-side oil pressure standard value P _s, in some cases the automatic transmission TM does not operate properly.
Therefore, in shipping inspection of the factory of the solenoid valve V, when the supply pressure of the hydraulic oil OIL for individuals with solenoid valve V is less than the lower-side oil pressure standard value P _s manages the individual as a defective product, shipment Take measures such as stopping
That is, the individual solenoid valves V to be assembled to the vehicle, one of the individuals also have passed the inspection of the lower limit hydraulic pressure standard value P _s. In other words, the individual solenoid valves V to be assembled to the vehicle, one of the individuals also supply pressure of the hydraulic oil OIL is above the lower limit hydraulic pressure standard value P _s. Or supply pressure of the hydraulic oil OIL exceeds what extent the lower limit hydraulic pressure standard value P _s is the variation of the degree for each individual solenoid valve V.

If the supply pressure of the hydraulic oil OIL is closer to the lower limit hydraulic pressure standard value P _s is compared with the case of greatly exceeds the lower limit hydraulic pressure standard value P _s, the supply pressure of the hydraulic oil OIL is supplied to the automatic transmission TM Low. In the automatic transmission TM, friction is generated between the primary pulley PP and the belt VT and between the belt VT and the secondary pulley SP. This friction increases as the supply pressure of the hydraulic oil OIL supplied to the automatic transmission TM increases. When this friction is large, the rotational force transmission loss in the automatic transmission TM becomes larger than when the friction is small, and as a result, the fuel consumption of the vehicle deteriorates. Therefore, in order to improve the fuel efficiency of the vehicle, the supply pressure of the hydraulic oil OIL supplied to the automatic transmission TM is closer to the lower limit hydraulic pressure standard value P _s as compared to the case where much higher than the lower limit hydraulic pressure standard value P _s Is preferred.

Here, the deviation DSI calculated by the deviation calculating unit 130 is a difference between the hydraulic pressure characteristic data DIP and the lower limit hydraulic pressure standard data DSP. That is, the deviation DSI, which is a value that indicates whether the supply pressure of the individual solenoid valve V exceeds what extent the lower limit hydraulic pressure standard value P _s.
The deviation calculating unit 130 calculates the deviation between the individual hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210 for each individual electromagnetic valve V and the lower limit hydraulic standard data DSP as the deviation DSI.

  Note that the hydraulic characteristic data DIP may be updated according to the secular change of the solenoid valve V. In this case, the deviation calculation unit 130 calculates the deviation DSI based on the updated hydraulic pressure characteristic data DIP. In this case, the deviation calculating unit 130 may calculate the deviation DSI with reference to the hydraulic characteristic data DIP updated every time the driving current calculating unit 120-2 calculates the driving current I. That is, the deviation calculation unit 130 may calculate the deviation DSI by real-time processing. With this configuration, the deviation calculating unit 130 can calculate the deviation DSI based on the hydraulic characteristics of the solenoid valve V that changes in accordance with the secular change of the vehicle. Can be deterred.

  The drive current calculation unit 120-2 is different from the drive current calculation unit 120 described above in that the drive current I is calculated based on the deviation DSI calculated by the deviation calculation unit 130. Specifically, the drive current calculation unit 120-2 calculates the drive current I in the same manner as the calculation procedure (1) described above when the hydraulic pressure sensor PS is not in a failure state. In addition, when the hydraulic pressure sensor PS is in a failure state, the drive current calculation unit 120-2 calculates the drive current I according to the calculation procedure (2-2).

[Calculation procedure of drive current I (2-2)]
The drive current calculation unit 120-2 includes the target value TGT of the hydraulic pressure supplied from the host unit 20, the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210, and the deviation DSI calculated by the deviation calculation unit 130. Based on the above, the drive current I is calculated. Specifically, the drive current calculation unit 120-2 acquires the target value TGT of the hydraulic pressure from the upper unit 20. The drive current calculation unit 120-2 acquires the hydraulic characteristic data DIP from the hydraulic characteristic data storage unit 210. The drive current calculation unit 120-2 acquires the deviation DSI from the deviation calculation unit 130. As described above, the deviation DSI is a deviation between the hydraulic pressure characteristic data DIP of the solenoid valve V and the lower limit hydraulic pressure standard data DSP.
The drive current calculation unit 120-2 calculates the current value of the drive current I corresponding to the acquired target value TGT based on the graph of the hydraulic characteristic data DIP.

The drive current calculation unit 120-2 corrects the calculated drive current I with the deviation DSI. Specifically, the drive current calculation section 120-2, the lower-side oil pressure standard value P _s corresponding to the calculated driving current I, is calculated based on the lower limit side hydraulic standard data DSP. Drive current calculation section 120-2 calculates a lower limit hydraulic pressure standard value P _s calculated, based on the hydraulic pressure characteristic data DIP, the drive current I after correction corresponding to the lower limit hydraulic pressure standard value P _s.
In other words, the drive current calculation unit 120-2 calculates the drive current I based on the pressure deviation between the lower limit hydraulic standard data DSP and the hydraulic characteristic data DIP of the automatic transmission TM.

[Operation of Hydraulic Control Device 10-2]
Next, the operation of the hydraulic control device 10-2 will be described with reference to FIG.
FIG. 6 is a diagram illustrating an example of the operation of the hydraulic control device 10-2 according to the present embodiment. Each step of the operation shown in FIG. 6 shows an example of a specific operation of step S80 shown in FIG.

[(1) Calculation of deviation ΔP _c ]
(Step S8010) drive current calculating unit 120-2 with reference to the hydraulic pressure characteristic data DIP stored in hydraulic pressure characteristic data storage unit 210, the driving current corresponding to the _{I 2} using the initial hydraulic PI ₂ test time of measurement pressure P Obtain as _c2 . As a specific example, when the drive current I ₂ = 1000 [mA] in the hydraulic pressure characteristic data DIP shown in FIG. 2, the initial use hydraulic pressure PI ₂ = 200 [kPa]. In this case, the drive current calculation unit 120-2 acquires the initial use hydraulic pressure PI ₂ = 200 [kPa] corresponding to the drive current I ₂ = 1000 [mA] as the measurement pressure P _c2 at the time of inspection.

(Step S8020) The drive current calculation unit 120-2 refers to the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210, and determines the initial use hydraulic pressure PI ₁ corresponding to the drive current I ₁ to the measured pressure P at the time of inspection. Obtained as _c1 . As a specific example, when the drive current I ₁ = 200 [mA] in the hydraulic characteristic data DIP shown in FIG. 2, the initial use hydraulic pressure PI ₁ = 4500 [kPa]. In this case, the drive current calculation unit 120-2 acquires the initial use hydraulic pressure PI ₁ = 4500 [kPa] corresponding to the drive current I ₁ = 200 [mA] as the measurement pressure P _c1 at the time of inspection.

(Step S8030) drive current calculation section 120-2, a drive current _{I 2} and the examination time measured pressure _{P c2} obtained in step S8010, the drive current _{I 1} and the examination time measured pressure _{P c1} obtained in step S8020 Based on the above, the slope of the drive current-hydraulic characteristic curve deviation Δ is calculated. In the following description, the slope of the drive current-hydraulic characteristic curve CC1 is also referred to as “deviation ΔPc _” .

Here, the current value of the drive current I ₁ is different from the current value of the drive current I ₂ described above. That is, in step S8030 from step S8010, the drive current calculating unit 120-2, the driving current I of the current value different for the two-point drive current - to obtain the hydraulic pressure characteristic, calculates a deviation [Delta] P _c. An example of the relationship between the drive current I and the hydraulic pressure of the hydraulic oil OIL is shown in FIG.

  FIG. 7 is a diagram illustrating an example of the relationship between the drive current I and the hydraulic pressure of the hydraulic oil OIL according to the present embodiment. An example of the driving current-hydraulic characteristic calculated based on the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210 is shown in a driving current-hydraulic characteristic curve CC1. The drive current-hydraulic characteristic curve CC1 is a line segment obtained by linear interpolation of the hydraulic characteristic data DIP stored in the hydraulic characteristic data storage unit 210.

  In this example, the case where the drive current-hydraulic characteristic curve CC1 is a line segment obtained by linearly interpolating the hydraulic characteristic data DIP will be described, but the present invention is not limited to this. It may be. The drive current calculation unit 120-2 corrects the drive current I by calculating the slope of the drive current-hydraulic characteristic curve CC1.

More specifically, in step S8010, the drive current calculation unit 120-2 refers to the hydraulic pressure characteristic data DIP and calculates an intersection point Q _c2 between the drive current I ₂ and the measurement pressure P _c2 at the time of inspection.
In step S8020, the drive current calculation unit 120-2 calculates an intersection point Q _c1 between the drive current I ₁ and the test measurement pressure P _c1 with reference to the hydraulic pressure characteristic data DIP.
In step S8030, the drive current calculating unit 120-2, the intersection _{Q c2} and intersection _{Q c1} and linear interpolation and drive current - the calculated hydraulic pressure characteristic curve CC1, the driving current - slope of the hydraulic pressure characteristic curve CC1, i.e. the deviation ΔP _c is calculated.

[(2) Calculation of Pressure Deviation ΔP ₂ at Pressure Adjustment Point]
(Step S8040) Returning to FIG. 6, the drive current calculating unit 120-2, a lower limit that with reference to the lower limit hydraulic standard data DSP stored in the lower limit hydraulic pressure standard value storage unit 220, corresponding to the driving current _{I 2} The side hydraulic pressure standard value _Ps2 is acquired. In the specific example of the present embodiment, as shown in FIG. 5, the lower limit hydraulic pressure standard value P _s2 = 100 [kPa] corresponds to the drive current I ₂ = 1000 [mA]. In the case of this specific example, the drive current calculation unit 120-2 obtains the lower limit hydraulic pressure standard value P _s2 = 100 [kPa] corresponding to the drive current I ₂ = 1000 [mA].

(Step S8050) drive current calculating unit 120-2 with reference to the hydraulic pressure characteristic data DIP stored in hydraulic pressure characteristic data storage unit 210, obtains the inspection time measuring pressure _{P c2} corresponding to the drive current _{I 2.} In the specific example of the present embodiment, as shown in FIG. 2, the measurement current pressure P _c2 = 200 [kPa] corresponds to the drive current I ₂ = 1000 [mA]. In the case of this specific example, the drive current calculation unit 120-2 acquires the measurement pressure P _c2 = 200 [kPa] at the time of inspection corresponding to the drive current I ₂ = 1000 [mA].

(Step S8060) drive current calculating unit 120-2 calculates the lower limit oil pressure standard value _{P s2} obtained in step S8050, the pressure deviation [Delta] P ₂ and the inspection time measuring pressure _{P c2} obtained in step S8060. In this embodiment, the drive current calculating unit 120-2 calculates the lower limit oil pressure standard value _P s2 = 100 [kPa], the inspection time measuring pressure _P c2 = 200 pressure deviation [Delta] P ₂ of the [kPa].
Here, the pressure deviation ΔP ₂ is a pressure difference between the lower limit side hydraulic standard value P _s and the inspection measurement pressure P _c at the pressure adjustment point. The pressure adjustment point is a reference point when the drive current calculation unit 120-2 corrects the current value of the drive current I based on the drive current-hydraulic characteristic curve. In the example shown in FIG. 7, the pressure deviation is based on the coordinates of the intersection point Q _s2 between the drive current I ₂ and the lower limit hydraulic pressure standard value P _s2 and the intersection point Q _c2 between the drive current I ₂ and the measured pressure P _c2 at the time of inspection. ΔP ₂ is calculated. In this case, the tone pressure point is a point of intersection _{Q c2.}
That is, the driving current calculation unit 120-2, in step S8060 from step S8040, and calculates the pressure deviation [Delta] P ₂ in regulating pressure point.

[(3) Correction of drive current I at the pressure adjustment point]
(Step S8070) drive current calculating unit 120-2, pressure deviation [Delta] P ₂ calculated in step S8060 it is determined whether it is within the predetermined range ± d. Drive current calculation section 120-2, pressure deviation [Delta] P ₂ if it is determined to be within the predetermined range ± d; (step S8070 YES), the process proceeds to step S8090. Drive current calculation section 120-2, pressure deviation [Delta] P ₂ if it is determined that it is not within a predetermined range ± d; (step S8070 NO), the process proceeds to step S8080.

(Step S8080) drive current calculating unit 120-2, the current value corresponding to the pressure difference [Delta] P ₂ calculated in step S8060, it is corrected by adding the drive currents _{I 2.} Specifically, the drive current calculation section 120-2, the lower limit hydraulic pressure standard value _{P s2} and the driving current - to calculate the intersection point _{Q c3} the hydraulic characteristic curve CC1. Drive current calculation section 120-2, a driving current _{I 2} + [delta] at intersection point _{Q c3} the calculated difference of the current value of the drive current _{I 2} in the intersection _{Q c2,} i.e. [delta], a current value corresponding to the pressure difference [Delta] P ₂ Calculate as Drive current calculation section 120-2, the current value [delta] corresponding to the pressure deviation [Delta] P ₂ calculated, by adding the drive currents I _2, and calculates the driving current I _{2 +} [delta] as the drive current I after the correction .

(Step S8090) The drive current calculation unit 120-2 acquires the lower limit hydraulic standard data DSP stored in the lower limit hydraulic standard value storage unit 220, and based on the acquired lower limit hydraulic standard data DSP, the drive current -The slope ΔP ₀ of the lower limit side hydraulic pressure standard characteristic curve CC2 is calculated.

(Step S8100) drive current calculation section 120-2 calculates drive current in step S8090 - the difference between the slope [Delta] P ₀ for the lower limit hydraulic standard characteristic curve CC2, a deviation [Delta] P _c calculated in step S8030, i.e. the slope The difference ΔΔP ₀ is calculated.

(Step S8110) drive current calculating unit 120-2, slope difference DerutaderutaP ₀ calculated in step S8100 it is determined whether it is within the predetermined range ± dd. If the drive current calculation unit 120-2 determines that the slope difference ΔΔP ₀ is within the predetermined range ± dd (step S8110; YES), the process ends. If the drive current calculation unit 120-2 determines that the slope difference ΔΔP ₀ is not within the predetermined range ± dd (step S8110; NO), the process proceeds to step S8120.

(Step S8120) drive current calculating unit 120-2, the current value corresponding to the slope difference DerutaderutaP ₀ calculated in step S8060, it is corrected by adding the drive currents I. As a specific example, the drive current calculating unit 120-2, description will be given of a case of correcting the driving current I ₁ shown in FIG.

Drive current calculation section 120-2 calculates the driving current _{I 1} as a pre-correction drive current I. If the driving current I ₁ is supplied to the solenoid valve V, the supply pressure of OIL supplying solenoid valve V is in the automatic transmission TM, the drive current - pressure corresponding to the driving current I ₁ in the hydraulic pressure characteristic curve CC1, i.e. It is the measurement pressure _Pc1 at the time of inspection.
Drive current calculation section 120-2, a driving current - with reference to the lower limit hydraulic standard characteristic curve CC2, and the driving current I _1, the driving current - by calculating the intersection point Q _s1 of the lower limit hydraulic pressure standard characteristic curve CC2 The lower limit hydraulic pressure standard value P _s1 is calculated. Then, the drive current calculating unit 120-2, a lower-side oil pressure standard value _{P s1,} driving current - by calculating the intersection point _{Q c1-2} the hydraulic characteristic curve CC1, calculates a drive current _{I 1-2} .
That is, the driving current calculation unit 120-2, the inspection time measuring pressure _{P c1} when the driving current _{I 1} to the solenoid valve V is supplied, the deviation ΔP between the lower limit oil pressure standard value _{P s1} of the driving current _{I 1 1} based on, to calculate the correction value [Delta] I ₁ of the driving current _{I 1.}

As described above, the driving current calculation unit 120-2, based on the lower limit side oil pressure standard value P _s1 stored in the lower limit hydraulic pressure standard value storage unit 220, corrects the driving current I _1. The lower limit hydraulic pressure standard value P _s1 is lower than the measured pressure P _c1 at the time of inspection. That is, the driving current calculation unit 120-2, by correcting the driving current I _1, the solenoid valve V is to reduce the supply pressure of the hydraulic oil OIL supplied to the automatic transmission TM.

  In the prior art, when a failure occurs in the hydraulic pressure sensor PS and hydraulic feedback control cannot be performed, open loop control may be performed. In this prior art, when performing open loop control, it has not been possible to determine to what extent the supply pressure of the hydraulic oil OIL supplied to the automatic transmission TM can be reduced. Therefore, in this prior art, when a failure occurs in the hydraulic pressure sensor PS, the supply pressure of the hydraulic oil OIL supplied from the electromagnetic valve V to the automatic transmission TM cannot be reduced. For this reason, according to the prior art, when a failure occurs in the hydraulic pressure sensor PS, there has been a problem that it is not possible to suppress a reduction in fuel consumption of the vehicle.

Hydraulic control device 10-2 of this embodiment, based on the lower limit side hydraulic standard data DSP, for correcting the driving current I _1, the supply pressure of the hydraulic oil OIL for supplying the solenoid valve V is in the automatic transmission TM, It can be reduced to the lower limit of the standard value. That is, according to 10-2 of the present embodiment, when a failure occurs in the hydraulic pressure sensor PS, it is possible to suppress a decrease in fuel consumption of the vehicle.

  In addition, each embodiment described above and its modification examples can be combined as appropriate within a range that does not contradict each other.

  Each of the above devices has a computer inside. The process of each device described above is stored in a computer-readable recording medium in the form of a program, and the above-described processing is performed by the computer reading and executing the program. Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

The program may be for realizing a part of the functions described above.
Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, what is called a difference file (difference program) may be sufficient.

  DESCRIPTION OF SYMBOLS 10, 10-2 ... Hydraulic control apparatus, 20 ... High-order unit, 30 ... Hydraulic supply part, 100, 100-2 ... Operation part, 110 ... Hydraulic sensor failure determination part, 120, 120-2 ... Drive current calculation part, 130 ... Deviation calculation unit, 200, 200-2 ... Storage unit, 210 ... Hydraulic characteristic data storage unit, 220 ... Lower limit side hydraulic standard value storage unit, P ... Oil pump, OP ... Oil pan, HP ... Hydraulic oil piping, V ... Solenoid valve, SL ... solenoid, OIL ... hydraulic oil, TM ... automatic transmission, PS ... hydraulic sensor

Claims (6)

A hydraulic control device for controlling a hydraulic pressure of hydraulic oil supplied to the automatic transmission via the electromagnetic valve by controlling a driving current of the electromagnetic valve;
A hydraulic pressure sensor for measuring the hydraulic pressure of the hydraulic oil;
An output of the hydraulic sensor is supplied, and a hydraulic sensor failure determination unit that determines failure of the hydraulic sensor;
A drive current calculation unit for calculating the drive current;
Have
The drive current calculator is
When the hydraulic sensor failure determination unit determines that the hydraulic sensor is not in a failure state, the drive current is calculated based on the measured hydraulic pressure of the hydraulic oil measured by the hydraulic sensor,
When the hydraulic sensor failure determination unit determines that the hydraulic sensor is in a failure state, based on hydraulic characteristic data indicating a relationship between the drive current for each product of the electromagnetic valve and the hydraulic oil pressure. Calculating the drive current;
Hydraulic control device. The hydraulic characteristic data is data indicating a relationship between the drive current measured for each electromagnetic valve and the hydraulic oil pressure in the initial use state of the electromagnetic valve.
The hydraulic control device according to claim 1. The hydraulic control device according to claim 1, wherein the drive current calculation unit calculates the drive current based on a pressure deviation between a lower limit hydraulic standard value of the automatic transmission and the hydraulic characteristic data. A deviation calculating unit for calculating a deviation between the lower limit hydraulic standard value of the automatic transmission and the hydraulic characteristic data;
The hydraulic control device according to claim 3, wherein the drive current calculation unit calculates the drive current based on the deviation calculated by the deviation calculation unit. The hydraulic pressure sensor failure determination unit determines a failure of the hydraulic pressure sensor based on a deviation between the target value of the hydraulic pressure and the measured hydraulic pressure measured by the hydraulic pressure sensor. The hydraulic control device according to item. A computer provided in a hydraulic control device that controls the hydraulic pressure of hydraulic oil supplied to the automatic transmission via the electromagnetic valve by controlling the drive current of the electromagnetic valve,
A drive current calculating step for calculating the drive current based on a measured hydraulic pressure of the hydraulic oil measured by a hydraulic pressure sensor in a vehicle-mounted state;
A hydraulic sensor failure determination step for determining a failure of the hydraulic sensor;
When the hydraulic sensor failure determination step determines that the hydraulic sensor is in a failure state, based on hydraulic characteristic data indicating a relationship between the drive current for each product of the solenoid valve and the hydraulic oil pressure, A drive current correction step for correcting the drive current;
A program for running

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