JP2013179149A - Solenoid controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform appropriate energization control in a device including a first solenoid operating with an on or off command current value, and a second solenoid operating with a duty command value.SOLUTION: A solenoid controller 10 includes a first solenoid 11 operating with an on or off command current value and a second solenoid 12 operating with a duty command value, an ECU 14 outputting a command current value and a duty command value, a first solenoid command current value (upper limit) calculation unit 22 for estimating the upper limit of the command current value on the basis of the temperature of the first solenoid 11 detected by an oil temperature sensor 15, and a second solenoid duty command value (upper limit) setting unit 25 for setting a value obtained by subtracting the upper limit of the command current value from an allowable current value between the ECU 14 and a power supply 13 as the upper limit of the duty command value.

Description

  The present invention relates to a solenoid control device.

  2. Description of the Related Art Conventionally, for example, a control device that corrects a solenoid current according to temperature dependency of a resistance value of a solenoid coil in a linear solenoid operated by a pulse width modulation signal is known (see, for example, Patent Document 1).

JP 2000-179667 A

By the way, in the control device according to the above prior art, in addition to the linear solenoid operated by the pulse width modulation signal, a single power source is provided for the actuator system provided with the shift solenoid operated by the on / off command current value. When power is supplied from the power supply, it is necessary to perform energization control in consideration of the temperature dependence of the resistance value of the shift solenoid.
In this case, for example, if the actuator system is configured such that the maximum current corresponding to the temperature dependence of the solenoid current flowing through each of the linear solenoid and the shift solenoid can be energized simultaneously, except when the maximum current flows through both the linear solenoid and the shift solenoid. However, the allowable current of the actuator system is excessive as compared with the current that actually flows through the actuator system, resulting in a problem that the cost required for the configuration of the actuator system increases.

  Further, in an actuator system configured to have an appropriate allowable current in advance, energization control is performed simply to ensure simultaneously the maximum current corresponding to the temperature dependence of the solenoid current flowing through each of the linear solenoid and the shift solenoid. However, if this allowable current is smaller than the sum of the maximum currents of the solenoid currents, the energization control cannot be performed properly, and the linear solenoid and the shift solenoid may be broken.

  The present invention has been made in view of the above circumstances, and in a device including a first solenoid that operates according to an on / off command current value and a second solenoid that operates according to a duty command value, appropriate energization control can be performed. It aims to provide a possible solenoid control device.

  In order to solve the above-described problems and achieve the object, a solenoid control device according to claim 1 of the present invention is a first solenoid that operates according to a command current value of on or off (for example, the first solenoid according to the embodiment). A solenoid 11) and a second solenoid that operates according to a duty command value (for example, the second solenoid 12 in the embodiment) and a first control unit that outputs the command current value for controlling the first solenoid (for example, ECU 14 in the embodiment), second control means for outputting the duty command value (for example, the ECU 14 in the embodiment also serves), and temperature detection means for detecting the temperature related to the first solenoid (for example, An upper limit command current for estimating an upper limit value of the command current value based on the oil temperature sensor 15) in the embodiment and the temperature detected by the temperature detection means Estimating means (for example, the first solenoid command current value (upper limit value) calculation unit 22 and the third solenoid command current value (upper limit value) calculation unit 42 in the embodiment) and the upper limit current estimation unit Upper limit duty command value setting means for setting an upper limit value of the duty command value based on the upper limit value (for example, the second solenoid duty command value (upper limit value) setting unit 25 in the embodiment).

  Furthermore, a solenoid control device according to claim 2 of the present invention controls a third solenoid (for example, the third solenoid 31 in the embodiment) that operates according to an on or off command current value, and the third solenoid. Third control means for outputting the command current value (for example, also serving as the ECU 14 in the embodiment), the temperature detection means detects a temperature related to the third solenoid, and the upper limit command current value The estimation means includes the command current value for controlling the first solenoid and the command current value for controlling the third solenoid based on the temperatures related to the first solenoid and the third solenoid detected by the temperature detection means. And the upper limit duty command value setting means adds the upper limit value estimated by the upper limit current estimation means to the added value of each upper limit value. Hazuki, sets the upper limit value of the duty command value.

  Furthermore, the solenoid control device according to claim 3 of the present invention includes power supply means (for example, the power supply 13 in the embodiment) for supplying power to the control means, and the upper limit duty command value setting means includes the A value obtained by subtracting the upper limit value of the command current value from the current value in which energization is permitted between the control means and the power supply means is set as the upper limit value of the duty command value.

According to the solenoid control device of the first aspect of the present invention, in the device including the first solenoid that operates based on the on / off command current value and the second solenoid that operates based on the duty command value, for example, the temperature varies depending on the temperature. By setting the upper limit value of the duty command value while ensuring energization of the upper limit value of the command current value to the first solenoid, the duty command value is maximized within the allowable current value range in which the device can be energized. An upper limit can be set.
In addition, when setting an allowable current value in which energization is permitted in advance when designing the apparatus, setting an excessive allowable current value is prevented, and actual energization that changes according to the temperature is applied. The allowable current value can be appropriately set according to the current value (that is, the upper limit value of the command current value of the first solenoid), and it is possible to prevent the cost required for the device configuration from increasing.

According to the solenoid control device of the second aspect of the present invention, even when a plurality of solenoids (for example, the first solenoid and the third solenoid) that operate according to the on / off command current value are provided, the device is energized. The maximum upper limit value can be set for the duty command value within the allowable current value range.
Further, it is possible to prevent an excessive allowable current value from being set in advance when designing a system and the like. In addition, current values that are actually energized that change according to temperature (that is, each of the first solenoid and the second solenoid). The allowable current value can be appropriately set according to the upper limit value of the command current value), and the cost required for the device configuration can be prevented from increasing.

According to the solenoid control device of the third aspect of the present invention, the maximum upper limit value can be set for the duty command value within the range of the current value in which energization is permitted between the control means and the power supply means. it can.
In addition, when designing a system in advance, it is possible to prevent an excessive value from being set between the control means and the power supply means, and to increase the cost required for the device configuration. Can be prevented.

It is a block diagram of the solenoid control apparatus which concerns on embodiment of this invention. It is a block diagram of the solenoid control apparatus which concerns on embodiment of this invention. It is a graph which shows an example of the correspondence of the temperature of the 1st solenoid of the solenoid control apparatus which concerns on embodiment of this invention, and the oil temperature detected by the oil temperature sensor. It is a figure which shows an example of the correspondence of the temperature and electric current of the 1st solenoid and 2nd solenoid of the solenoid control apparatus which concern on embodiment of this invention. It is a flowchart which shows the operation | movement of the solenoid control apparatus which concerns on embodiment of this invention, especially the process which sets the upper limit of the duty command value which controls a 2nd solenoid. It is a block diagram of the solenoid control apparatus which concerns on the modification of embodiment of this invention. It is a block diagram of the solenoid control apparatus which concerns on the modification of embodiment of this invention. It is a lineblock diagram of vehicles provided with a solenoid control device concerning an embodiment of the invention.

  Hereinafter, a solenoid control device according to an embodiment of the present invention will be described with reference to the accompanying drawings.

  A solenoid control device 10 according to the present embodiment is provided, for example, in a hydraulic circuit of a transmission of a vehicle, and operates according to a first solenoid 11 that operates according to an on / off command current value and a duty command value, as shown in FIG. The second solenoid 12, a power source 13, an ECU (Electronic Control Unit) 14 constituted by an electronic circuit such as a CPU (Central Processing Unit), and an oil temperature sensor 15 are configured. .

  The first solenoid 11 is a so-called shift solenoid that opens and closes a valve provided in a hydraulic circuit, for example, and operates in accordance with an on / off command current value output from the ECU 14.

  The second solenoid 12 is a so-called linear solenoid that adjusts the pressure according to the valve opening degree of a valve provided in the hydraulic circuit, for example, and operates according to a duty command value output from the ECU 14.

  The power source 13 is, for example, a battery or an AC generator mounted on the vehicle, and is connected to the ECU 14 by a power source line 13a including, for example, a terminal, an electric wire, a fuse, and a harness.

ECU14 is connected to each 1st solenoid 11 and 2nd solenoid 12 by each power supply line 14a, 14b comprised from a terminal, an electric wire, a fuse, a harness, etc., for example.
The ECU 14 outputs a command current value for controlling the first solenoid 11 and a duty command value for controlling the second solenoid 12.
For example, the ECU 14 estimates the upper limit value of the command current value for controlling the first solenoid 11 based on the temperature related to the first solenoid 11, and further, based on the upper limit value of the command current value, the second solenoid 12. Sets the upper limit value of the duty command value that controls.

  For example, as shown in FIG. 2, the ECU 14 includes a first solenoid temperature estimation unit 21, a first solenoid command current value (upper limit value) calculation unit 22, a current supplyable current value calculation unit 23, and an allowable current output unit 24. The second solenoid duty command value (upper limit value) setting unit 25 and the energization control unit 26 are provided.

The first solenoid temperature estimation unit 21 estimates the temperature of the first solenoid 11 based on a detection result signal output from an oil temperature sensor 15 that detects the temperature (oil temperature) of hydraulic oil in the hydraulic circuit, for example. Output the resulting signal.
For example, as shown in FIG. 3, the first solenoid temperature estimation unit 21 stores data such as a map created in advance that indicates a predetermined correspondence between the oil temperature of the hydraulic circuit and the temperature of the first solenoid 11. In response to the detection result of the oil temperature output from the oil temperature sensor 15, this data is searched to obtain the temperature of the first solenoid 11.

The first solenoid command current value (upper limit value) calculation unit 22 is a command current value that controls the first solenoid 11 based on the signal of the temperature estimation result of the first solenoid 11 output from the first solenoid temperature estimation unit 21. The upper limit value of is calculated.
For example, the first solenoid command current value (upper limit) calculation unit 22 first calculates the impedance RT of the first solenoid 11 based on the temperature of the first solenoid 11, and then calculates the impedance RT of the first solenoid 11. Based on this, the current flowing through the first solenoid 11 is calculated, and the upper limit value of the command current value is set according to the calculation result.

The first solenoid command current value (upper limit value) calculation unit 22 is based on, for example, a preset parameter (1) shown below and known parameters (for example, the temperature T of the first solenoid 11 and the material of the first solenoid 11). The impedance RT of the first solenoid 11 corresponding to the temperature T is calculated using the temperature coefficient α corresponding to (for example, α = 0.00393 for copper) and the impedance R at 20 ° C.). .
RT = R × {1 + α × (T−20)} (1)
The impedance RT of the first solenoid 11 corresponding to the temperature T may be obtained by other methods.

Then, the first solenoid command current value (upper limit value) calculating unit 22 is connected to a predetermined voltage V applied to the first solenoid 11 from the power supply 13 via the ECU 14 and the impedance RT of the first solenoid 11 according to the temperature T. Accordingly, the current I (= V / RT) flowing through the first solenoid 11 is calculated.
Then, the first solenoid command current value (upper limit value) calculating unit 22 sets the current I flowing through the first solenoid 11 as the upper limit value of the command current value for controlling the first solenoid 11.

Note that the on / off command current value output from the ECU 14 to the first solenoid 11 only instructs on / off of the current flowing through the first solenoid 11 and does not control the amount of current.
The amount of current flowing through the first solenoid 11 changes according to the impedance RT of the first solenoid 11 that changes according to the temperature T of the first solenoid 11, and the temperature T rises, for example, as shown in FIG. Along with this, the current amount changes in a decreasing trend, and the current amount changes in an increasing trend as the temperature T decreases.

The energizable current value calculation unit 23 subtracts the upper limit value of the command current value output from the first solenoid command current value (upper limit value) calculation unit 22 from the allowable current value output from the allowable current output unit 24, for example. As a result, a current value that can be applied to the second solenoid 12 is calculated, and a signal indicating the calculation result is output.
The allowable current output unit 24 outputs a current value (allowable current value) that is allowed in advance between the power supply 13 and the ECU 14, such as a rated current of the power supply line 13 a.

  The second solenoid duty command value (upper limit value) setting unit 25 sets the current value that can be supplied to the second solenoid 12 output from the energizable current value calculation unit 23 to the upper limit of the duty command value that controls the second solenoid 12. Set as a value.

  Note that the duty command value output from the ECU 14 to the second solenoid 12 is a desired drive for the second solenoid 12 (for example, a desired value for an appropriate valve), for example, according to the duty by the on / off ratio of the voltage pulse signal. The valve opening degree is instructed to supply a desired amount of current to the current flowing through the second solenoid 12.

The impedance of the second solenoid 12 changes according to the temperature of the second solenoid 12, and the impedance increases as the temperature rises, and the impedance decreases as the temperature falls. In order to ensure the energization of a desired amount of current with respect to the current flowing through the current, the duty increases as the temperature rises, and the duty decreases as the temperature falls.
As a result, for example, as shown in FIG. 4, as the temperature of the second solenoid 12 rises, the amount of current supplied from the power supply 13 to the second solenoid 12 changes in an increasing trend, and the temperature of the second solenoid 12 changes. The amount of current supplied from the power supply 13 to the second solenoid 12 changes in a decreasing trend as it falls.

  The energization control unit 26 outputs a command current value for controlling the first solenoid 11 and controls the second solenoid 12 according to the upper limit value set by the second solenoid duty command value (upper limit value) setting unit 25. Outputs the duty command value.

  The solenoid control device 10 according to the present embodiment has the above-described configuration. Next, the operation of the solenoid control device 10, particularly, the processing for setting the upper limit value of the duty command value for controlling the second solenoid will be described.

  First, for example, in step S01 shown in FIG. 5, as a temperature related to the first solenoid 11, data such as a map created in advance is searched according to the detection result of the oil temperature output from the oil temperature sensor 15, for example. The temperature of the first solenoid 11 is estimated.

Next, in step S02, based on the estimation result of the temperature of the first solenoid 11, the impedance of the first solenoid 11 is calculated using, for example, the above-described formula (1).
Next, in step S03, the current flowing through the first solenoid 11 is calculated based on the calculation result of the impedance of the first solenoid 11, and this calculation result is used as the upper limit value of the command current value for controlling the first solenoid 11. Set.
Set as.

Next, in step S04, a command current for controlling the first solenoid 11 from a current value (allowable current value) allowed in advance between the power supply 13 and the ECU 14 such as a rated current of the power supply line 13a, for example. By subtracting the upper limit of the value, a current value that can be energized to the second solenoid 12 (energizable current value) is calculated.
Next, in step S05, the energizable current value is set as the upper limit value of the duty command value for controlling the second solenoid 12, and the process proceeds to the end.

  As described above, according to the solenoid control device 10 according to the present embodiment, the amount of current to be energized is not controlled (that is, the amount of current is constant), and the amount of current to be energized is a duty command. In the case of providing the second solenoid 12 controlled by the value, for example, the duty command value for the second solenoid 12 is secured in a state where the upper limit value of the command current value for the first solenoid 11 that changes according to the temperature is ensured to be energized. By setting the upper limit value, it is possible to set the maximum upper limit value for the duty command value within the range of the allowable current value in which energization is permitted by the power supply line 13a between the power supply 13 and the ECU 14.

  In addition, when setting an allowable current value that allows energization in the power supply line 13a between the power supply 13 and the ECU 14 at the time of designing the system in advance, setting an excessive allowable current value is prevented, The allowable current value can be appropriately set according to the current value that actually flows through the first solenoid 11 (that is, the upper limit value of the command current value) that changes according to the temperature, and the cost required for the device configuration increases. Can be prevented.

In the above-described embodiment, the solenoid control device 10 includes the first solenoid 11 and the second solenoid 12. However, the present invention is not limited to this. For example, at least one that operates according to an on or off command current value. You may provide the above solenoid and at least 1 or more solenoid which operate | moves with a duty command value.
When a plurality of solenoids that operate according to the on / off command current values are provided, the upper limit value of the duty command value may be set based on the added value of the upper limit values of the command current values of these solenoids.

The solenoid control device 10 according to the modification of the above-described embodiment includes an on / off state output from the ECU 14 in addition to the first solenoid 11 and the second solenoid 12, as shown in FIGS. A third solenoid 31 that operates according to the command current value is provided.
The ECU 14 is connected to the first solenoid 11, the second solenoid 12, and the third solenoid 31 by respective power supply lines 14 a, 14 b, 14 c including terminals, electric wires, fuses, harnesses, and the like.

  For example, as shown in FIG. 7, the ECU 14 includes a first solenoid temperature estimation unit 21, a first solenoid command current value (upper limit value) calculation unit 22, an energizable current value calculation unit 23, and an allowable current output unit 24. In addition to the second solenoid duty command value (upper limit) setting unit 25 and the energization control unit 26, a third solenoid temperature estimation unit 41, a third solenoid command current value (upper limit) calculation unit 42, It is configured with.

  The third solenoid temperature estimation unit 41 is, for example, similar to the first solenoid temperature estimation unit 21, based on the detection result signal output from the oil temperature sensor 15 that detects the oil temperature of the hydraulic circuit. Estimate the temperature and output the estimation result signal.

  The third solenoid command current value (upper limit) calculation unit 42 controls the third solenoid 31 based on a signal of the temperature estimation result of the third solenoid 31 output from the third solenoid temperature estimation unit 41. The upper limit value of is calculated.

  For example, the third solenoid command current value (upper limit value) calculating unit 42, first, similarly to the first solenoid command current value (upper limit value) calculating unit 22, first, based on the temperature of the third solenoid 31, the above formula (1 ) Or the like, and then the current flowing through the third solenoid 31 is calculated based on the impedance of the third solenoid 31, and the upper limit of the command current value is determined according to the calculation result. Set the value.

  Then, the energizable current value calculation unit 23 calculates the first solenoid command current value (upper limit value) calculation unit 22 and the third solenoid command current value (upper limit value) from the allowable current output from the allowable current output unit 24, for example. By subtracting the upper limit value of each command current value output from the calculation unit 42 (that is, subtracting the addition value of the upper limit value of each command current value), a current value that can be energized to the second solenoid 12 is calculated. Outputs the calculation result signal.

  In the above-described embodiment, the ECU 14 drives the second solenoid 12 when, for example, the upper limit value of the duty command value is smaller than the current value when the second solenoid 12 is driven in a desired state. A command signal for instructing the restriction may be output.

  Below, the vehicle 50 provided with the solenoid control apparatus 10 mentioned above is demonstrated.

For example, as shown in FIG. 8, the vehicle 50 includes an internal combustion engine 51 that is a power source of the vehicle, a lockup clutch 52 that is connected to a crankshaft (not shown) of the internal combustion engine 51 and transmits torque, A drive pulley 53 connected to the up clutch 52, a driven pulley 54 paired with the drive pulley 53, and a differential gear connected to the driven pulley 54 to transmit torque to the left and right drive wheels 56. And a drive wheel 56 connected to the gear mechanism 55.
The drive pulley 53 and the driven pulley 54 are capable of transmitting torque via a belt B stretched between them, and a belt type in which the gear ratio can be changed steplessly by increasing or decreasing the effective radius of each other. A continuously variable transmission is configured.

  The solenoid control device 10 mounted on the vehicle 50 includes, for example, a shift solenoid 61 that supplies, as one first solenoid 11, a hydraulic pressure for driving the lockup clutch 52 to engage or disengage, As the two second solenoids, a first linear solenoid 62 and a second linear solenoid 63 that supply hydraulic pressure for increasing and decreasing the effective radius of each drive pulley 53 and driven pulley 54 are provided.

Then, the shift solenoid 61 drives the lockup clutch 52 with a hydraulic pressure corresponding to an on or off command current value output from the ECU 14.
The first linear solenoids 62 and the second linear solenoids 63 increase or decrease the effective radii of the drive pulleys 53 and the driven pulleys 54 with a hydraulic pressure corresponding to the duty command value output from the ECU 14.

For example, the ECU 14 estimates the upper limit value of the command current value for controlling the shift solenoid 61 based on the temperature related to the shift solenoid 61 according to the detection result of the oil temperature in the hydraulic circuit common to the solenoids 61 to 63.
Then, the first linear solenoid 62 and the second linear solenoid 63 are obtained by subtracting the upper limit value of the command current value of the shift solenoid 61 from the current value (allowable current value) permitted in advance between the power supply 13 and the ECU 14. The total of current values that can be energized (current values that can be energized) is calculated.
Then, this total value is set as an addition value of the upper limit value of each duty command value for controlling the first linear solenoid 62 and the second linear solenoid 63.

  In this vehicle 50, the upper limit value of the duty command value for the first linear solenoid 62 and the second linear solenoid 6 is set in a state where the upper limit value of the command current value for the shift solenoid 61 that changes according to the temperature is ensured to be energized. As a result, within the range of the allowable current value in which energization is permitted between the power supply 13 and the ECU 14, the drive ratio of the drive pulley 53 and the driven pulley 54 is set appropriately while the drive of the lockup clutch 52 is ensured. Changes can be possible.

DESCRIPTION OF SYMBOLS 10 Solenoid control apparatus 11 1st solenoid 12 2nd solenoid 13 Power supply (electric power supply means)
14 ECU (first control means, second control means, third control means)
15 Oil temperature sensor (temperature detection means)
22 1st solenoid command current value (upper limit value) calculation part (upper limit command current value estimation means)
25 Second solenoid duty command value (upper limit) setting section (upper limit duty command value setting means)
31 3rd solenoid 42 3rd solenoid command current value (upper limit value) calculation part (upper limit command current value estimation means)

Claims (3)

A first solenoid that operates according to an on or off command current value and a second solenoid that operates according to a duty command value;
First control means for outputting the command current value for controlling the first solenoid;
Second control means for outputting the duty command value;
Temperature detecting means for detecting a temperature related to the first solenoid;
Upper limit command current value estimation means for estimating an upper limit value of the command current value based on the temperature detected by the temperature detection means;
Upper limit duty command value setting means for setting an upper limit value of the duty command value based on the upper limit value estimated by the upper limit current estimating means;
A solenoid control device comprising: A third solenoid that operates in accordance with an on or off command current value;
Third control means for outputting the command current value for controlling the third solenoid,
The temperature detecting means detects a temperature related to the third solenoid;
The upper limit command current value estimating means controls the command current value for controlling the first solenoid and the third solenoid based on the temperatures related to the first solenoid and the third solenoid detected by the temperature detecting means. Estimating each upper limit value of the command current value,
2. The solenoid according to claim 1, wherein the upper limit duty command value setting unit sets an upper limit value of the duty command value based on an addition value of the upper limit values estimated by the upper limit current estimation unit. Control device. Power supply means for supplying power to the control means;
The upper limit duty command value setting means obtains a value obtained by subtracting the upper limit value of the command current value from a current value permitted to energize between the control means and the power supply means. The solenoid control device according to claim 1, wherein the solenoid control device is an upper limit value.

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