JP2009228754A - Control device and hybrid control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device and a hybrid control device capable of improving travel performance and fuel economy in a vehicle, and capable of lengthening the service life of an oil pump, by controlling the oil pump, while precisely grasping the state of the oil pump, by detecting the actual delivery quantity of the oil pump. <P>SOLUTION: This control device 96 is provided for supplying hydraulic pressure to a hydraulic mechanism 8, by controlling any of a mechanical oil pump 61 driven by an engine 2 or an electric oil pump 62 driven by a battery 3, and controls the mechanical oil pump 61 or the electric oil pump 62 based on a difference between the actual delivery quantity and a target delivery quantity of the respective oil pumps 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a control device that supplies hydraulic pressure to a hydraulic mechanism by controlling either a mechanical oil pump driven by an engine or an electric oil pump driven by a battery.

  In order to drive various bearings, various pistons, various valves, camshafts, and other devices, the vehicle is provided with an oil pump that circulates oil stored in an oil pan to these devices. As the oil pump, a mechanical oil pump that is driven by the operation of an engine is usually used.

  By the way, in recent years, a hybrid vehicle has been proposed in which an engine and a motor generator are connected via a power split mechanism and the engine and the motor generator are used together to obtain power to improve the fuel consumption of the engine.

  In a hybrid vehicle, in addition to a mechanical oil pump that is driven when the engine is in operation, the vehicle is driven by battery power when the engine is stopped and driving power is supplied to the vehicle only by the motor generator. An electric oil pump is provided. That is, the hybrid vehicle is provided with a plurality of oil pumps.

  When the performance of the mechanical or electric oil pump described above is deteriorated due to deterioration over time or the like, a device driven by hydraulic pressure cannot obtain the hydraulic pressure necessary for driving, and the vehicle may not be operated normally. was there.

  In order to solve such problems, Patent Document 1 is driven by an internal combustion engine, a transmission whose torque capacity changes according to the hydraulic pressure, an electric oil pump that generates a hydraulic pressure that sets the torque capacity in the transmission. A mechanical oil pump for generating a hydraulic pressure for setting a torque capacity in the transmission, an abnormality detection means for detecting an abnormality of the electric oil pump, and an internal combustion engine for driving the internal combustion engine when an abnormality is detected by the abnormality detection means A control device for a hybrid vehicle is disclosed that can continue to supply hydraulic pressure by a mechanical oil pump driven by the operation of an internal combustion engine even if an abnormality occurs in the electric oil pump. ing.

Further, in Patent Document 2, there is a power transmission device in which the deterioration state of the electric hydraulic pressure generating means is determined based on the cumulative driving time of the electric hydraulic pressure generating means or the cumulative rotation speed of the pump as the electric hydraulic pressure generating means. It is disclosed.
JP-A-2005-207305 JP 2000-230442 A

  However, in a vehicle having a plurality of oil pumps such as a hybrid vehicle, the degree of deterioration of each oil pump varies depending on the frequency of use of each oil pump. That is, in Patent Document 1 and Patent Document 2, even if each oil pump has not been judged to be broken or deteriorated, the oil pump to be used depends on the variation of the deterioration level of each oil pump. There is a risk that the running performance may vary.

  Further, in many cases, only a single oil pump is mounted on a vehicle driven only by an engine, and the oil pump cannot be switched as in Patent Document 1 and Patent Document 2. Therefore, it is preferable to detect the degree of deterioration of the oil pump before the oil pump breaks down or deteriorates, and urge the vehicle user to replace or repair the oil pump.

  In view of the above-described conventional problems, an object of the present invention is to detect the actual discharge amount of an oil pump, thereby controlling the oil pump while accurately grasping the state of the oil pump. The object is to provide a control device and a hybrid control device capable of improving fuel consumption and extending the life of an oil pump.

  In order to achieve the above object, the characteristic configuration of the control device according to the present invention is to supply hydraulic pressure to the hydraulic mechanism by controlling either a mechanical oil pump driven by an engine or an electric oil pump driven by a battery. A control device for controlling the mechanical oil pump or the electric oil pump based on a difference between an actual discharge amount and a target discharge amount of each oil pump.

  According to the above-described configuration, the control device detects the actual oil pump state by calculating the difference between the actual discharge amount of the oil pump and the target discharge amount set to the theoretical discharge amount or the like. Controls such as stopping the oil pump or reducing its use frequency.

  As described above, according to the present invention, by detecting the actual discharge amount of the oil pump, the oil pump is controlled while accurately grasping the state of the oil pump, thereby improving the running performance and fuel consumption of the vehicle. In addition, it is possible to provide a control device capable of extending the life of the oil pump.

  Hereinafter, embodiments in which the control device and the hybrid control device according to the present invention are applied to a hybrid vehicle will be described.

  As shown in FIG. 1, a hybrid vehicle 1 includes an engine 2 operating as an engine, a battery 3, a motor generator 4, an inverter 5, an oil pump 6, a continuously variable transmission 7, a hydraulic mechanism 8, and a control device according to the present invention. An electronic control device 9 including a hydraulic pump control device 96 and a hybrid control device 94 as an example is provided. In FIG. 1, a thick arrow indicates the flow of oil, and a thin arrow indicates an electric signal.

  The engine 2 is a means for generating power conventionally used in automobiles. The engine 2 fuels an air-fuel mixture composed of fuel such as gasoline and air, and reciprocates the piston with the pressure to generate driving force. generate.

  The hybrid vehicle 1 includes, as a battery 3, an HV battery 31 as a driving battery that supplies power to a motor generator 4 that is used to drive the vehicle, and an auxiliary battery 32 that is used for purposes other than driving such as power supply to lighting. For example, it is comprised by assembled batteries, such as a lithium ion battery and a nickel hydride battery, which connected in series a plurality of modules in which a plurality of battery cells are integrated.

  The motor generator 4 includes a rear motor generator (hereinafter referred to as rear MG) 41, a power generation motor generator (hereinafter referred to as power generation MG) 42, and an alternator 43.

  The rear MG 41 is connected to the HV battery 31 via the inverter 5 and can function as both a generator and an electric motor that drives the rear wheel T1. More specifically, the rear MG 41 functions as a motor that is rotationally driven with a predetermined torque by power supply from the HV battery 31 during power running control, or a state that functions as a generator that charges the HV battery 31 during regenerative braking. It can be switched to either of these.

  The power generation MG 42 and the alternator 43 are connected to the engine 2 and generate power by the rotation of the engine 2. The generated power in the power generation MG42 is used for charging the HV battery 31, and the generated power in the alternator 43 is used for charging the auxiliary battery 32. The power generation MG 42 and the alternator 43 may also be configured to function as an electric motor that is rotationally driven with a predetermined torque by power supplied from the battery 3, similarly to the rear MG 41.

  That is, the hybrid vehicle 1 includes a motor driven by the battery 3 as a drive source.

  The inverter 5 is a power conversion device that converts the direct current of the HV battery 31 and the alternating current of the motor generator 4. The inverter 5 includes a DCDC converter 51, a rear MG inverter 52, a power generation MG inverter 53, and an electric oil pump inverter 54. It is prepared for.

  The DCDC converter 51 converts the high-voltage direct current input from the HV battery 31 into a low-voltage direct current and outputs it to the auxiliary battery 32.

  The rear MG inverter 52 converts the direct current input from the HV battery 31 into an alternating current and outputs the alternating current to the rear MG 41, and converts the alternating current input from the rear MG 41 into a direct current and outputs it to the HV battery 31. To do.

  The power generation MG inverter 53 converts the direct current input from the HV battery 31 into an alternating current and outputs it to the power generation MG 42, and converts the alternating current input from the power generation MG 42 into a direct current and outputs it to the HV battery 31. To do.

  The electric oil pump inverter 54 converts the direct current input from the HV battery 31 into an alternating current and outputs the alternating current to the electric oil pump 62 described later.

  The oil pump 6 is a pump for circulating oil stored in an oil pan to devices such as various bearings, various pistons, various valves, and a camshaft, and the devices are driven by the hydraulic pressure of the circulated oil. .

  The hybrid vehicle 1 includes a mechanical oil pump 61 and an electric oil pump 62 as the oil pump 6.

  The mechanical oil pump 61 includes a rotating body such as a cam gear connected to the crankshaft 20 that is the output shaft of the engine 2, and circulates oil to the equipment by driving the rotating body in conjunction with the driving of the engine 2. Let That is, the mechanical oil pump 61 is driven by the engine 2 that operates as an engine. The mechanical oil pump 61 cannot stably supply hydraulic pressure unless the rotational speed of the engine 2 exceeds a predetermined value.

  The electric oil pump 62 includes a rotating body such as a cam gear, and circulates oil by driving the rotating body by feeding power from the HV battery 31.

  The continuously variable transmission 7 is configured to transmit the power of the engine 2 to the front wheels T2, and includes a flex lockup mechanism 710 as a clutch mechanism for intermittently transmitting power from the crankshaft 20 of the engine 2. A torque converter 71, a forward / reverse switching clutch mechanism 72, and a continuously variable transmission mechanism 73 in which a metal belt 732 is wound between two pulleys (primary pulley 730 and secondary pulley 731) whose diameters change are configured to be hydraulic. The clutch engagement pressure by the flex lockup mechanism 710 is controlled by the hydraulic pressure PLU from the mechanism 8, the forward / backward movement is switched by the hydraulic pressure PC 1 from the hydraulic mechanism 8, and the gear ratio is switched steplessly by the hydraulic pressure PIN. The hydraulic pressure PD from the hydraulic mechanism 8 adjusts the clamping pressure of the secondary pulley 731.

  For example, as shown in FIG. 2, the hydraulic mechanism 8 includes various oil regulator valves (line pressure valve 81, upshift valve 82, downshift valve 83, open / close control and pressure adjustment by solenoids S1, S2, and S3. And a belt clamping pressure valve 84). A check valve 85 is provided between the electric oil pump 62 and the line pressure valve 81 to prevent the backflow of oil. Solenoids S1, S2, and S3 are controlled by a shift control device 95 described later.

  This will be described in detail below. The hydraulic mechanism 8 is configured to be supplied with hydraulic pressure from the mechanical oil pump 61 when the engine 2 is driven, and supplied with hydraulic pressure from the electric oil pump 62 when the motor generator 4 is driven. The supplied hydraulic pressure from the mechanical oil pump 61 or the electric oil pump 62 is guided to the line pressure valve 81, regulated by the solenoid S1, and output to the upshifting valve 82 and the belt clamping pressure valve 84.

  When the solenoid S2 is driven, the upshift valve 82 is driven to supply oil to the oil chamber of the primary pulley 730 (broken line in the figure), and the groove width of the primary pulley 730 is narrowed. The diameter of the drive belt 732 changes and shifts up. On the other hand, when the solenoid S3 is driven, the shift-down valve 83 is driven and oil is discharged from the oil chamber of the primary pulley 730 (a chain line in the figure), and the groove width of the primary pulley 730 is widened. The diameter of the drive belt 732 changes and shifts down. That is, the shift control device 95 controls the gear ratio of the continuously variable transmission 7 by controlling the driving of the solenoids S2 and S3.

  The oil pressure chamber for clamping the drive belt 732 sandwiched between the secondary pulleys 731 is supplied to the oil chamber of the secondary pulley 731. The oil pressure PD is regulated by the control of the solenoid S1.

  The electronic control unit 9 includes a battery control unit 91 that monitors the state of charge of the battery 3, an engine control unit 92 that controls the intake air amount and the fuel injection amount of the engine 2, and a skid control unit 93 that controls the skid. And a hybrid control device 94 that controls the engine control device 92 and the motor generator 4 based on the required power of the hybrid vehicle 1 and the charge permission power and discharge permission power of the battery 3, and the hydraulic mechanism 8. A shift control device 95 that controls the continuously variable transmission 7 by drivingly controlling the solenoids S1, S2, and S3 is provided.

  Each electronic control device 9 is provided with a microcomputer including a CPU, a ROM and / or EEPROM storing a control program executed by the CPU, a RAM used as a working area, an input / output circuit, and the like. Each function of each electronic control unit 9 described below is realized by the CPU executing a control program. Each electronic control unit 9 is connected to be communicable with each other.

  Measurement values such as the output voltage, output current, and temperature of the battery 3 are input to the battery control device 91, and the battery control device 91 determines the remaining battery capacity (hereinafter referred to as “SOC (”) based on these measurement values. State of Charge) ”).

  The engine control device 92 outputs the output signals of sensors such as throttle opening detection means and A / F sensors provided in the engine 2 and communication data from other electronic control devices 9 (for example, from the hybrid control device 94). The engine 2 is grasped based on the data (required power) and the like, and the engine 2 is driven and controlled to achieve an appropriate rotational speed by controlling the amount of fuel supplied to the engine 2 and the supply timing.

  The skid control device 93 controls a brake or the like to prevent skid, which is a skid phenomenon that occurs when the vehicle turns a curve at high speed.

  The hybrid control device 94 determines the engine output and the engine output based on the driving state of the hybrid vehicle 1 such as the accelerator opening obtained from the accelerator position sensor, the shift position obtained from the shift position sensor, and the vehicle speed information obtained from the vehicle speed sensor. Calculate the motor torque. Further, the hybrid control device 94 receives from the battery control device 91 the power value required by the battery 3 calculated from the SOC or the like by the battery control device 91.

  Then, the hybrid control device 94 uses the power value necessary for realizing the calculated engine output and motor torque and the power of the total value of the power value required by the battery 3 received from the battery control device 91 as the engine. The control device 92 and the motor generator 4 are requested.

  The hybrid control device 94 supplies the electric power discharged from the battery 3 to the rear MG 41 when the hybrid vehicle 1 is powered, and the motor generator 4 is charged with the electric power generated by the motor generator 4 during regenerative braking of the hybrid vehicle 1. Control.

  More specifically, the hybrid control device 94 is a map showing the distribution of engine output and motor torque with respect to the operating state of the hybrid vehicle 1 stored in the SOC of the battery 3 input from the battery control device 91 and the ROM of the hybrid control device 94. Calculation processing is executed based on the information and the like, and the motor generator 4 is controlled such that charging / discharging of the battery 3 is performed within the range of the charging permission power Win and the discharge permission power Wout.

  Here, the charge permission power Win and the discharge permission power Wout are the input / output permission power range of the battery 3 defined according to the SOC estimated by the battery control device 91, and the charge permission power Win is basically the same. The negative value and discharge permission power Wout are basically positive values. When the input / output power of the battery 3 deviates from the input / output permission power range, charging / discharging of the battery 3 is prohibited under the control of the battery control device 91.

  The shift control device 95 controls the solenoids S1, S2, and S3 of the hydraulic mechanism 8 based on the operation state. Thereby, the gear ratio in the continuously variable transmission 7 is switched.

  The shift control device 95 includes a hydraulic pump control device 96. That is, the function of the hydraulic pump control device 96 described below is realized by the CPU provided in the transmission control device 95 executing a control program stored in the ROM or the EEPROM of the transmission control device 95.

  The hydraulic pump control device 96 is configured to control either the mechanical oil pump 61 or the electric oil pump 62 to supply hydraulic pressure to the hydraulic mechanism 8.

  For example, the hydraulic pump control device 96 controls the hybrid control device 94 so as to stop the power supply to the electric oil pump 62 when the engine 2 is driven, thereby increasing the hydraulic pressure from the mechanical oil pump 61 to the hydraulic mechanism 8. When the motor generator 4 is driven, hydraulic pressure is supplied from the electric oil pump 62 to the hydraulic mechanism 8 by controlling the hybrid controller 94 so as to drive the electric oil pump 62.

  Further, the hydraulic pump control device 96 can also control to start the engine 2 and supply hydraulic pressure from the mechanical oil pump 62 to the hydraulic mechanism 8 even when the engine 2 is stopped. In this case, the hydraulic pump The control device 96 sends an engine start command to the hybrid control device 94, and the hybrid control device 94 that has received the command controls the engine control device 92 to start the engine 2.

  The hydraulic pump control device 96 controls the mechanical oil pump 61 or the electric oil pump 62 based on the difference between the actual discharge amount of each oil pump 6 and the theoretical discharge amount as an example of the target discharge amount.

  In the present embodiment, the hydraulic pump control device 96 determines the degree of deterioration of each oil pump 6 based on the difference, and controls the mechanical oil pump 61 or the electric oil pump 62 based on the determination result.

  For example, the hydraulic pump control device 96 determines the degree of deterioration of each oil pump 6 based on whether or not the difference between the actual discharge amount and the theoretical discharge amount of each oil pump 6 exceeds the determination threshold continuously for a predetermined time.

  As shown in FIG. 1, between each oil pump 6 and the hydraulic mechanism 8, there are provided flow rate sensors 61A and 62A for outputting the oil discharge amounts of the oil pumps 61 and 62 as digital signals or the like. The control device 96 reads the output values of the flow sensors 61A and 62A every predetermined time, and calculates the actual discharge amount of each oil pump 61 and 62 every predetermined time.

  In the ROM or EEPROM of the speed change control device 95 provided with the hydraulic pump control device 96, the number of rotations of the rotating body that drives each oil pump 6 and oil discharge every predetermined time (for example, every minute) with respect to the number of rotations. 4 is stored in advance, and the hydraulic pump control device 96 searches the map data based on the read rotational speeds of the rotating bodies of the oil pumps 61 and 62. By doing so, the theoretical discharge amount for every predetermined time is derived.

  FIG. 4 shows map data when each oil pump 61, 62 is a gear type. Therefore, when each of the oil pumps 61 and 62 is of another type such as a trochoid type, the hydraulic pump control device 96 searches the map data after storing the map data of the type in ROM or EEPROM in advance.

  The rotational speed of the rotating body of each oil pump 61, 62 is, for example, at the position facing the rotating disk of each oil pump 61, 62, a pulse disk having a plurality of teeth formed around it, and the plurality of teeth. The hydraulic pump control device 96 reads a signal indicating the angular position of the rotating body read by the angle sensor, and calculates the number of rotations of the rotating body based on the signal.

  The hydraulic pump control device 96 calculates the difference between the actual discharge amount and the theoretical discharge amount by subtracting the theoretical discharge amount derived from the calculated actual discharge amount.

  The ROM or EEPROM of the speed change control device 95 provided with the hydraulic pump control device 96 is based on the number of determination counters corresponding to the number of stages of deterioration that is counted up at every predetermined timing, and the count value of each determination counter. One deterioration degree counter that counts up is stored for each of the oil pumps 61 and 62.

  In the following, regarding the determination of the degree of deterioration based on the count value of each counter in the mechanical oil pump 61, a configuration example in which two determination counters are provided (that is, a configuration example in which the number of stages of deterioration level is two steps) is shown in FIG. This will be described in detail based on the graph shown in FIG. In this example, the first determination counter is a counter for indicating whether or not the deterioration is mild, and the second determination counter is a counter for indicating whether or not the deterioration is severe.

  As shown in the uppermost graph of FIG. 3, a count-up threshold value for starting counting of each determination counter is set in advance. Here, the count-up threshold value of the second determination counter for severe deterioration determination is set larger than the count-up threshold value of the first determination counter for mild deterioration determination.

  When the difference between the actual discharge amount and the theoretical discharge amount becomes larger than the set count-up threshold, the count of the determination counter corresponding to the count-up threshold is started, and the difference between the actual discharge amount and the theoretical discharge amount is set. When it becomes smaller than the count-up threshold, the determination counter corresponding to the count-up threshold is reset. That is, in FIG. 3, the count of the first determination counter starts at timings T1, T3, and T5, is reset at timings T2 and T4, and the count of the second determination counter starts at timings T6, T8, and T10, and timing T7 , T9.

  As shown in the second and third graphs of FIG. 3, each determination counter is set with a determination threshold for counting up the deterioration degree counter.

  In FIG. 3, the count value of the deterioration level counter is incremented from 0 to 1 at the timing T11 when the count value of the first determination counter becomes larger than the determination threshold value. That is, the hydraulic pump control device 96 determines that the mechanical oil pump 61 is slightly deteriorated. In addition, the count value of the deterioration degree counter is incremented from 1 to 2 at timing T12 when the count value of the second determination counter becomes larger than the determination threshold. That is, the hydraulic pump control device 96 determines that the mechanical oil pump 61 is severely deteriorated.

  In the above description, the mechanical oil pump 61 has been described. However, the electric oil pump 62 is also processed in the same manner as the mechanical oil pump 61, and the hydraulic pump control device 96 is connected to the electric oil pump 61. Determine the degree of deterioration.

  According to the above-described configuration, the hydraulic pump control device 96 does not determine the deterioration of the oil pump indirectly based on the oil usage period or the like, but directly determines the deterioration of the oil pump based on the discharge amount of the oil pump. Therefore, it is possible to determine the deterioration of the oil pump more accurately.

  In the above description, each of the oil pumps 6 is provided with a determination counter for the number of stages of deterioration degree and one deterioration degree counter, and the hydraulic pump control device 96 performs deterioration based on the count values of these counters. The configuration for determining the degree has been described. However, the configuration may be such that the counter is not provided. For example, the hydraulic pump control device 96 has an actual discharge amount that is a predetermined ratio (from a theoretical discharge amount) as shown by a broken line in FIG. For example, when the difference is 20%) or more, it may be determined that the corresponding oil pump 6 is deteriorated.

  The hydraulic pump control device 96 is configured to control the drive time ratio of each pump 6 to be different based on the difference when both the mechanical oil pump 61 and the electric oil pump 62 can be driven. Yes.

  This will be described in detail below. The hydraulic pump control device 96 compares the degree of deterioration of both oil pumps 6 and increases the drive time ratio of the oil pump 6 having a small degree of deterioration. As a method for determining the drive time ratio, for example, the determination is made based on the ratio of the degree of deterioration. Specifically, when the degree of deterioration of each oil pump 6 is set in five stages from 0 (no deterioration) to 4 (severe deterioration), the following determination is made. That is, when the deterioration level of the mechanical oil pump 61 is 4 and the deterioration level of the electric oil pump 62 is 1, the drive time ratio is 4: 1, and the deterioration level of the mechanical oil pump 61 is 2 and the When the deterioration level of the oil pump 62 is 2, the driving time ratio is 1: 1.

  When both the oil pumps 6 have a degree of deterioration of 0, the drive time ratio may be 1: 1, or the oil pump 6 to be driven may be determined based on the drive states of the engine 2 and the motor generator 4. Good.

  Here, the drive time that is a reference for determining the drive time ratio is, for example, the following time. That is, from the start of the vehicle by the operation of the starter switch of the vehicle to the stop of the vehicle by the operation of the starter switch of the vehicle thereafter as one trip, the one trip is divided at predetermined time intervals. The time is set as a reference driving time.

  According to the above-described configuration, since the drive time of the oil pump 6 having a severe deterioration is reduced, it is possible to prevent the oil pump 6 having a severe deterioration from further deteriorating and failing.

  The hybrid controller 94 is configured to prohibit the stop of the engine 2 when the hydraulic pump controller 96 determines that the degree of deterioration of the electric oil pump 62 exceeds a predetermined degree of deterioration.

  This will be described in detail below. The hybrid vehicle 1 may perform so-called EV traveling in which the engine 2 is stopped during traveling and the vehicle is driven only by the driving force of the motor generator 4 from the viewpoint of improving fuel efficiency.

  However, even if the electric oil pump 62 is severely deteriorated, if the electric oil pump 62 is continuously used during EV traveling, the electric oil pump 62 may break down.

  Therefore, the hydraulic pump control device 96 sets in advance a degree of deterioration that is assumed to be severely deteriorated of the electric oil pump 62, and determines that the degree of deterioration of the electric oil pump 62 exceeds the degree of deterioration. When this is done, an engine stop prohibition command is transmitted to the hybrid controller 94.

  The hybrid control device 94 that has received the engine stop prohibition command does not stop the engine 2 even if it is determined that EV traveling is to be performed. That is, EV traveling is not performed. As a result, the supply of hydraulic pressure from the mechanical oil pump 61 to the hydraulic mechanism 8 is continued. Further, the hydraulic pump control device 96 continues to control the hybrid control device 94 so that electric power is not supplied to the electric oil pump 62 because the driving of the engine 2 is continued.

  Hereinafter, processing of the hydraulic pump control device 96 and the hybrid control device 94 according to the present invention will be described based on the flowchart shown in FIG.

  The hydraulic pump control device 96 reads the output values of the flow sensors 61A and 62A every predetermined time, calculates the actual discharge amount of each oil pump 6 for every predetermined time (SA1), and reads each oil pump 6 read. By searching the map data by the number of rotations of the rotating body, the theoretical discharge amount for each predetermined time of each oil pump 6 is derived (SA2), and the difference between the actual discharge amount and the theoretical discharge amount of each oil pump 6 is calculated ( SA3).

  The hydraulic pump control device 96 determines the deterioration level of each of the oil pumps 61 and 62 based on the determination counter that counts up based on the difference calculated in step SA3 and the count value of the deterioration level counter that counts up based on the count value of the determination counter. Determine (SA4).

  When the hydraulic pump control device 96 determines that the deterioration level of the electric oil pump 62 exceeds a predetermined deterioration level set in advance (SA5), the hydraulic pump control device 96 transmits an engine stop prohibition command to the hybrid control device 94. The hybrid control device 94 that has received the engine stop prohibition command controls the engine control device 92 so as not to stop the engine 2 so that the hydraulic oil supply to the hydraulic mechanism 8 is performed by the mechanical oil pump 61. (SA6).

  Further, the hydraulic pump control device 96 compares the deterioration levels of the two oil pumps 61 and 62 (SA7), and if the deterioration level of the mechanical oil pump 61 is greater than the deterioration level of the electric oil pump 62, the mechanical pump The drive time ratio of the oil pump 61 is reduced (SA8), and when the deterioration level of the mechanical oil pump 61 is smaller than the deterioration degree of the electric oil pump 62, the drive time ratio of the mechanical oil pump 61 is increased ( SA9).

  Hereinafter, another embodiment will be described. In the above-described embodiment, the hydraulic pump control device 96 has been described with respect to the configuration for determining the degree of deterioration of each oil pump 6 based on the difference between the actual discharge amount and the theoretical discharge amount of each oil pump 6. The configuration may be such that the degree of deterioration is detected from the rotational speed of the rotating body when excess oil is released.

  For example, in the line pressure valve 81 shown in FIG. 2, the amount of oil that needs to be discharged every predetermined time increases as the rotational speed of the rotating body of the oil pump 6 increases. In that case, the surplus oil is returned to the oil pan.

  Then, the hydraulic pump control device 96 calculates the rotational speed of the rotating body of the oil pump 6 when surplus oil is actually generated and the rotating speed of the rotating body of the oil pump 6 at which surplus oil is generated during normal operation. The difference may be calculated, and when the calculated difference is equal to or greater than a predetermined value set in advance, the oil pump 6 may be determined to be deteriorated. In other words, the hydraulic pump control device 96 determines that the drive capacity of the oil pump 6 is reduced when, for example, excess oil is generated at 3000 rotations during normal operation and excess oil is generated at 4000 rotations. To do.

  The detection of the rotational speed of the rotating body of the oil pump 6 when surplus oil is actually generated is performed as follows. That is, a flow rate sensor for detecting excess oil is provided in the vicinity of the output port of the line pressure valve 81 on the flow path from the oil regulator valve (in this example, the line pressure valve 81) to the oil pan, The control device 96 detects the number of rotations when surplus oil is generated when the detected value of the flow sensor becomes equal to or higher than a predetermined value set in advance.

  The hydraulic pump control device 96 may be configured not to perform the deterioration degree determination when there is an abnormality in the oil.

  This will be described in detail below. For example, the hydraulic pump control device 96 detects the oil amount of the oil pan with a gauge sensor or the like, and determines that the oil amount is abnormal if the oil amount is outside a preset predetermined range. The structure which does not implement may be sufficient.

  As another example, the hydraulic pump control device 96 determines that the oil temperature is abnormal if the oil temperature is outside a predetermined range (for example, 0 ° C. or lower or 150 ° C. or higher). The structure which does not implement this determination may be sufficient.

  Furthermore, as another example, the hydraulic pump control device 96 stores the time when the oil was changed, and when the predetermined time set in advance has elapsed from the time, the oil viscosity is normal due to the deterioration of the oil. However, it is possible that the deterioration degree is not determined.

  According to the above-described configuration, since the hydraulic pump control device 96 performs the deterioration degree determination of the oil pump 6 only when the oil is normal, the deterioration degree determination of the oil pump 6 can be performed more accurately.

  When the degree of deterioration of the oil pump 6 exceeds a predetermined value, a configuration may be provided in which notification means is provided to notify the user of the hybrid vehicle 1 to that effect.

  For example, the notification means is constituted by a liquid crystal panel of a navigation device mounted on the hybrid vehicle 1, and when the degree of deterioration of the oil pump 6 exceeds a predetermined value, a signal to that effect is sent to the hydraulic pump control device. 96, and is displayed as a message of characters or images.

  Further, the notification means may be configured by a car audio and a speaker mounted on the hybrid vehicle 1, and may output a voice message from the speaker that the oil pump 6 has deteriorated. Further, the notification means may be configured to notify the user that the oil pump 6 has deteriorated by lighting of an indicator lamp or the like provided on the instrument panel or the like of the hybrid vehicle 1.

  According to the above-described configuration, the notification unit can notify the user that the oil pump 6 has deteriorated, thereby prompting the user to replace or repair the oil pump before failure.

  The processing of the hydraulic pump control device 96 and the hybrid control device 94 having the configuration described in the above other embodiments will be described based on the flowchart shown in FIG.

  The hydraulic pump control device 96 determines whether or not there is an abnormality in the oil based on the temperature of the oil, the amount of oil stored in the oil pan, or the viscosity of the oil. Is not performed (SB1).

  When the oil is normal (SB1), the hydraulic pump control device 96 detects the excess oil that has escaped from the oil regulator (SB2), and the rotation of the oil pump 6 when the excess oil is actually detected. Based on the difference between the number of rotations of the body and the number of rotations of the rotating body of the oil pump 6 at which surplus oil is generated during normal operation, it is determined whether or not the oil pump 6 has deteriorated (SB3).

  As a result, when it is determined that the oil pump 6 has deteriorated (SB4), the notification means receives a signal to that effect from the hydraulic pump control device 96 and displays it as a message of characters or images (SB5). .

  In the above-described embodiment, the configuration in which the shift control device 95 includes the hydraulic pump control device 96 has been described. However, the hybrid control device 94 may include the hydraulic pump control device 96. In this case, the hydraulic pump control device 96 may be configured to receive the detection values of the flow rate sensors 61A and 62A via the shift control device 95, or the flow rate sensors 61A and 62A and the hybrid control device 94 may be connected. The detection value may be directly received from the flow sensors 61A and 62A.

  Further, the hybrid vehicle 1 may be configured to include the hydraulic pump control device 96 as an independent control device.

  In the above-described embodiment, the configuration in which the hybrid control device 84 controls the motor generator 4 has been described. However, the hybrid vehicle 1 may be provided with a motor generator control device that controls the motor generator 4. In the case of such a configuration, the hybrid control device 84 causes the engine control device 92 to control the engine 2 on the basis of the required power of the hybrid vehicle 1 and the charge permission power and discharge permission power of the battery 3, and The motor generator control device is controlled.

  In the above-described embodiment, the configuration in which the hybrid vehicle 1 includes the two oil pumps 6 including the mechanical oil pump 61 and the electric oil pump 62 has been described. However, the number of oil pumps 6 provided in the hybrid vehicle 1 is two. Not limited to individual.

  For example, the configuration of determining the state such as the degree of deterioration of the oil pump 6 based on the difference between the actual discharge amount and the theoretical discharge amount of the oil pump 6, the configuration including the notification means, and the presence or absence of oil abnormality In the configuration in which the determination of the deterioration degree is not performed, the number of oil pumps 6 provided in the hybrid vehicle 1 may be one. Of course, the hybrid vehicle 1 may have a configuration in which three or more oil pumps 6 are mounted.

  In the above-described embodiment, the configuration in which the hydraulic pump control device 96 is provided in the hybrid vehicle 1 has been described. However, the hydraulic pump control device 96 is not limited to the hybrid vehicle 1, and for example, the hydraulic pump control device 96. However, the vehicle may be mounted on a vehicle that travels only with the driving force of the engine 2.

  Note that the above-described embodiment is merely an example of the present invention, and it is needless to say that the specific configuration of each block can be changed and designed as appropriate within the scope of the effects of the present invention.

Functional block diagram of hybrid vehicle Functional block diagram of hydraulic mechanism Explanatory drawing of a judgment counter and a deterioration degree counter Explanatory diagram of map data composed of the number of rotations of oil pump rotor and oil discharge amount Flowchart for explaining processing of hydraulic pump control device and hybrid control device according to the present invention The flowchart for demonstrating the process of the hydraulic pump control apparatus of the structure demonstrated by another embodiment, and a hybrid control apparatus.

Explanation of symbols

1: Hybrid vehicle 2: Engine 3: Battery 8: Hydraulic mechanism 6: Oil pump 61: Mechanical oil pump 62: Electric oil pump 96: Hydraulic pump control device

Claims (5)

A control device that supplies hydraulic pressure to a hydraulic mechanism by controlling either a mechanical oil pump driven by an engine or an electric oil pump driven by a battery,
A control device that controls the mechanical oil pump or the electric oil pump based on a difference between an actual discharge amount and a target discharge amount of each oil pump. A control device that supplies hydraulic pressure to a hydraulic mechanism by controlling either a mechanical oil pump driven by an engine or an electric oil pump driven by a battery,
A control device that determines a deterioration degree of each oil pump based on a difference between an actual discharge amount and a target discharge amount of each oil pump, and controls the mechanical oil pump or the electric oil pump based on the determination result.   The control device according to claim 2, wherein the degree of deterioration of each oil pump is determined based on whether or not a difference between an actual discharge amount and a target discharge amount of each oil pump at a predetermined number of revolutions exceeds a determination threshold value continuously for a predetermined time.   3. The control device according to claim 1, wherein when both the mechanical oil pump and the electric oil pump are drivable, control is performed so that a drive time ratio of each pump is different based on the difference.   4. In a hybrid vehicle including a motor driven by the battery as a vehicle drive source, when the control device according to claim 2 determines that the degree of deterioration of the electric oil pump exceeds a predetermined degree of deterioration. And a hybrid control device that prohibits the engine operating as the engine from being stopped.

Images