WO2011058650A1 - 内燃機関の潤滑システム - Google Patents
内燃機関の潤滑システム Download PDFInfo
- Publication number
- WO2011058650A1 WO2011058650A1 PCT/JP2009/069381 JP2009069381W WO2011058650A1 WO 2011058650 A1 WO2011058650 A1 WO 2011058650A1 JP 2009069381 W JP2009069381 W JP 2009069381W WO 2011058650 A1 WO2011058650 A1 WO 2011058650A1
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- WIPO (PCT)
- Prior art keywords
- internal combustion
- combustion engine
- oil
- temperature
- generator
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/001—Heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/005—Controlling temperature of lubricant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
Definitions
- the present invention relates to a lubrication system for an internal combustion engine, and more particularly to a system for warming a lubricating oil for an internal combustion engine using heat generated by a generator.
- Patent Document 1 discloses a technique in which a heater is provided in a lubricating oil path as a technique for warming lubricating oil in an internal combustion engine.
- Patent Document 2 includes a water-cooled oil cooler, a bypass passage for bypassing the oil cooler and flowing lubricating oil, and an electromagnetic valve for adjusting the flow rate of the lubricating oil in the oil cooler and the bypass passage,
- a water-cooled oil cooler for bypassing the oil cooler and flowing lubricating oil
- an electromagnetic valve for adjusting the flow rate of the lubricating oil in the oil cooler and the bypass passage
- Patent Document 3 discloses a water-cooled alternator including an alternator, a housing that surrounds the alternator, and a cooling mechanism that is provided in the housing and cools the alternator with water.
- Patent Document 4 discloses a technique in which cooling water flows through an alternator and an engine when the operating temperature of the internal combustion engine is low.
- Patent Document 5 includes an electric heater that heats lubricating oil of an internal combustion engine using electric energy, and surplus power generated by an alternator when the temperature of the lubricating oil is low and the internal combustion engine is in a decelerating state. Discloses a technique for operating an electric heater.
- An object of the present invention is to suitably reduce friction of an internal combustion engine when the internal combustion engine is in a cold state, thereby reducing fuel consumption and exhaust emission.
- the present invention employs the following means in order to solve the above-described problems. That is, the present invention includes a generator capable of exchanging heat with the lubricating oil of the internal combustion engine, and heating the lubricating oil with the heat generated by the generator, thereby suppressing overheating of the generator and reducing the friction of the internal combustion engine. I made it.
- the internal combustion engine lubrication system of the present invention includes: An internal combustion engine through which lubricating oil circulates; A generator capable of exchanging heat with the lubricating oil of the internal combustion engine; Control means for raising the temperature of the lubricating oil by the heat generated by the generator, and supplying the lubricating oil after the temperature rise to the internal combustion engine; I was prepared to.
- Lubricating oil has the property that the viscosity increases when the temperature is low. For this reason, friction increases at the sliding portion of the internal combustion engine, and the load of the oil pump increases.
- the generator has a characteristic that the power generation efficiency decreases when the temperature is high. For this reason, when the temperature of the generator increases, the engine output consumed for driving the generator may increase.
- the internal combustion engine lubrication system of the present invention is configured so that the heat can be directly exchanged with the lubricating oil of the internal combustion engine, the temperature of the lubricating oil is increased by the heat generated by the generator, and the temperature of the lubricating oil is increased.
- the lubricating oil after warming was supplied to the internal combustion engine.
- control means may increase the power generation amount of the generator when the temperature of the lubricating oil is low compared to when it is high. According to such a control method, the temperature of the lubricating oil can be quickly raised to an appropriate temperature. Further, according to such a control method, although the amount of heat generated by the generator increases, the heat of the generator is transmitted to the lubricating oil, so that it is possible to avoid overheating of the generator.
- the control means may increase the power generation amount of the generator on the condition that the temperature of the lubricating oil is lower than a predetermined target temperature.
- a predetermined target temperature a temperature equivalent to the oil temperature at the completion of warm-up of the internal combustion engine can be used.
- the control means may stop increasing the power generation amount of the generator when the load (required torque) of the internal combustion engine becomes higher than a predetermined reference load. If the power generation amount of the generator is increased when the load on the internal combustion engine is high, the generated torque of the internal combustion engine may not reach the required torque. Therefore, there is a possibility that the driver of the vehicle equipped with the internal combustion engine further increases the accelerator opening. As a result, the fuel consumption of the internal combustion engine may increase.
- the increase in the power generation amount of the generator is stopped when the load on the internal combustion engine is higher than the reference load, the increase in the fuel consumption as described above can be avoided. Note that when the load on the internal combustion engine increases, the amount of heat generated by the internal combustion engine increases. Therefore, the lubricating oil rises quickly upon receiving heat from the internal combustion engine.
- the increase in the power generation amount of the generator is stopped when the load of the internal combustion engine is higher than the reference load, the increase in fuel consumption can be suppressed without disturbing the temperature rise of the lubricating oil.
- the control means may stop increasing the power generation amount of the generator when the power generation amount of the generator increases with respect to the allowable power supply amount of the electric circuit fed from the generator. In that case, it is possible to avoid a situation in which excessive electric power is supplied to the electric circuit.
- the lubrication system of an internal combustion engine is provided with the heater which heats lubricating oil using an electrical energy, you may make it operate a heater with the surplus electric power generated by the generator. In that case, the temperature rise of the lubricating oil is further promoted by the heat generated by the generator and the heat generated by the heater.
- the generator has a relatively large heat capacity. Therefore, when the temperature of the generator is low, especially when the temperature of the generator is lower than the temperature of the lubricating oil, if the heat exchange is performed between the generator and the lubricating oil, the temperature increase rate of the lubricating oil decreases on the contrary. there is a possibility.
- control means of the present invention may reduce the amount of the lubricating oil that exchanges heat with the generator during the period when the temperature of the generator is lower than the temperature of the lubricating oil.
- “decrease” includes a case where the amount of lubricating oil exchanged with the generator becomes zero.
- the amount of lubricating oil exchanged with the generator is limited in this way, it is possible to avoid a situation where the heat of the lubricating oil is taken away by the generator.
- the period until predetermined time passes from the time of the start of an internal combustion engine can be illustrated.
- the generator hardly generates power, so the temperature of the generator hardly increases.
- the lubricating oil rises not a little due to the compression heat and combustion heat generated in the internal combustion engine. Therefore, during the start of the internal combustion engine and / or immediately after the start, the temperature of the generator becomes lower than the temperature of the lubricating oil.
- the temperature increase rate of the generator becomes higher than the temperature increase rate of the lubricating oil. Therefore, when a predetermined time has elapsed since the start of the internal combustion engine, the temperature of the generator becomes higher than the temperature of the lubricating oil.
- the predetermined time described above can be obtained in advance by an adaptation operation using an experiment or the like. Further, the predetermined time may be set to be longer when the temperature of the generator at the start of the internal combustion engine is lower than when the temperature is high. That is, the predetermined time described above may be changed (corrected) according to the temperature of the generator when the internal combustion engine is started.
- a bypass route that bypasses the generator and distributes the lubricating oil, and a bypass route is provided for the amount of lubricating oil that passes through the generator.
- a flow rate adjusting mechanism for changing a ratio of the amount of flowing lubricating oil is added to the lubrication system, and a method for controlling the flow rate adjusting mechanism so as to reduce the amount of lubricating oil heat exchanged with the generator is illustrated. it can.
- the present invention it is possible to reduce the friction of the internal combustion engine using the heat generated by the generator. As a result, it is possible to reduce the fuel consumption of the internal combustion engine and the exhaust emission.
- FIG. 1 is a diagram showing a schematic configuration of a lubrication system for an internal combustion engine.
- the internal combustion engine lubrication system includes an oil storage tank 2 for storing oil as lubricating oil of the internal combustion engine 1.
- the oil storage tank 2 may be an oil pan attached to the lower part of the internal combustion engine 1 or may be a tank arranged separately from the internal combustion engine 1.
- Oil stored in the oil storage tank 2 is sucked up by the oil pump 3 and discharged toward the internal combustion engine 1.
- the oil discharged from the oil pump 3 is supplied to the internal combustion engine 1 through the oil filter 4, the oil cooler 5, and the alternator 6 in order.
- the oil supplied to the internal combustion engine 1 returns to the oil storage tank 2 after passing through an oil passage (not shown).
- the oil pump 3 described above is connected to the output shaft (crankshaft) of the internal combustion engine 1 via a belt or gear, and is driven by the rotational energy of the crankshaft or the mechanical pump driven by the rotational energy of the crankshaft.
- This is an electric pump.
- the oil filter 4 described above is a filter that removes solid particles contained in oil.
- the aforementioned oil cooler 5 is a heat exchanger for cooling the oil. As shown in FIG. 2, the oil cooler 5 of the present embodiment adjusts the amount of cooling water flowing into the heat exchanger 50 that exchanges heat between the cooling water of the internal combustion engine 1 and the oil, and the heat exchanger. And a flow rate adjusting valve 51.
- the flow rate adjusting valve 51 is an electric flow rate adjusting valve that is opened and closed by a step motor, a solenoid, or the like.
- the oil cooler 5 includes an air-cooled heat exchanger, a bypass passage that bypasses the heat exchanger and flows oil, and a switching valve that circulates oil to either the heat exchanger or the bypass passage.
- An oil cooler provided may be used.
- the switching valve may be an electric valve that is opened and closed by a step motor, a solenoid, or the like, or may be a thermostat valve that performs switching operation according to the temperature of oil.
- a thermostat type valve that is closed (shut off) when the oil temperature is lower than a certain temperature and opened when the oil temperature is equal to or higher than the certain temperature is used. You can also.
- the alternator 6 is connected to an output shaft (crankshaft) (not shown) of the internal combustion engine 1 via a belt or the like, and converts the kinetic energy (rotational energy) transmitted from the output shaft into electrical energy. It is.
- the alternator 6 is configured to be able to exchange heat directly with oil.
- a method for realizing heat exchange between the alternator 6 and the oil a method is adopted in which an oil passage is formed in the housing of the alternator 6 so that heat of the rotor or the like is transmitted to the oil through the housing wall surface.
- a method of allowing the heat of the rotor (rotor) or the like to be transmitted to the oil by circulating or scattering the oil can be exemplified.
- the internal combustion engine lubrication system configured as described above is provided with an ECU 7 for controlling the internal combustion engine 1 and the above-described devices.
- the ECU 7 is an electronic control unit that includes a CPU, ROM, RAM, backup RAM, and the like.
- the oil temperature sensor 8 is a sensor that detects the temperature of oil circulating in the internal combustion engine 1, and is disposed downstream of the alternator 6 in the oil flow direction.
- the water temperature sensor 9 is a sensor that detects the temperature of the cooling water circulating in the internal combustion engine 1, and is disposed upstream of the oil cooler 5 in the flow direction of the cooling water.
- the accelerator position sensor 10 is a sensor that outputs an electrical signal corresponding to an operation amount (accelerator opening) of an accelerator pedal (not shown).
- the ECU 7 electrically controls the oil cooler 5 and the alternator 6 based on the output signals of the various sensors described above.
- the ECU 7 controls the oil cooler 5 and the alternator 6 according to the oil temperature control routine shown in FIG.
- the oil temperature control routine is a routine stored in advance in the ROM of the ECU 7 and is periodically executed by the ECU 7.
- the ECU 7 first executes the process of S101.
- S101 the ECU 7 reads the output signal (oil temperature) Toil of the oil temperature sensor 8 and the output signal (cooling water temperature) Thw of the water temperature sensor 9.
- the ECU 7 determines whether or not the oil temperature Toil read in S101 is higher than a predetermined temperature T1.
- the predetermined temperature T1 is a temperature lower limit value at which the power generation efficiency of the alternator 6 falls within an allowable range or a temperature slightly lower than the lower limit value, and is a temperature obtained experimentally in advance.
- the ECU 7 proceeds to S103 and executes an oil temperature reduction process. Specifically, the ECU 7 increases the opening degree of the flow rate adjustment valve 51 of the oil cooler 5 from the current time. At this time, the increase amount of the opening degree of the flow rate adjustment valve 51 may be set to be larger when the oil temperature Toil is high than when the oil temperature Toil is low.
- the ECU 7 increases the discharge amount of the oil pump 3 in S103, so that the alternator 6 supplies the oil per unit time.
- the amount of heat transferred may be increased. In that case, the temperature of the alternator 6 can be lowered more quickly.
- the ECU 7 determines whether or not the oil temperature Toil read in S101 is lower than a predetermined temperature T2.
- the predetermined temperature T2 is a temperature lower than the predetermined temperature T1 and is set lower than the oil temperature when the warm-up of the internal combustion engine 1 is completed.
- the ECU 7 first compares the oil temperature Toil read in S101 with the coolant temperature Thw in S105. That is, the ECU 17 determines whether or not the oil temperature Toil is equal to or higher than the cooling water temperature Thw. If an affirmative determination is made in S105 (Toil ⁇ Thw), the ECU 7 proceeds to S106.
- the ECU 7 decreases (preferably fully closes) the opening degree of the flow rate adjustment valve 51 of the oil cooler 5 from the present time. Subsequently, the ECU 7 proceeds to S107 and increases the power generation amount of the alternator 6. The increase amount at that time may be set to be larger when the oil temperature Toil is low than when it is high.
- the ECU 7 may reduce the discharge amount of the oil pump 3 from the current time in S106 or S108. In this case, the amount of heat that the oil per unit amount receives from the alternator 6 and the cooling water increases. As a result, the temperature of the oil rises more rapidly.
- the oil temperature increasing process described above may be terminated when the oil temperature rises to a predetermined temperature T2 or when the difference between the oil temperature and the predetermined temperature T2 falls within an allowable range.
- the control means according to the present invention is realized. Therefore, the friction of the internal combustion engine 1 can be reduced using the heat generated by the alternator 6 when the internal combustion engine 1 is in a cold state. As a result, it is possible to reduce fuel consumption and exhaust emissions.
- the difference between the first embodiment described above and the present embodiment is that the execution method of the oil temperature increasing process is changed according to the load of the internal combustion engine 1. That is, the difference between the first embodiment and the present embodiment is that when the load on the internal combustion engine 1 is low, the amount of heat generated by the alternator 6 is increased as in the first embodiment described above. When the load of 1 is high, the heat generation of the alternator 6 is not increased and the temperature of the oil is increased.
- FIG. 4 is a flowchart showing an oil temperature control routine in the present embodiment.
- the same processes as those in the oil temperature control routine (see FIG. 3) of the first embodiment described above are denoted by the same reference numerals.
- S201 is executed after the processing of S106 or S108 is executed.
- the ECU 7 determines whether or not the load (engine load) of the internal combustion engine 1 is equal to or less than a predetermined load.
- a predetermined load is an engine load that can be considered that the oil can quickly rise in temperature due to the heat generated by the internal combustion engine 1, and is obtained in advance by an adaptation operation using experiments or the like.
- the ECU 7 executes the process of S107 as in the first embodiment described above. On the other hand, if a negative determination is made in S201, the ECU 7 skips the process of S107. In this case, the engine output consumed for driving the alternator 6 can be reduced without hindering the temperature rise of the oil. Therefore, it is possible to raise the temperature of the oil while suppressing a decrease in drivability of the internal combustion engine 1 and an increase in fuel consumption.
- the increase in the power generation amount of the alternator 6 is stopped when the engine load is higher than the predetermined load.
- the increase in the power generation amount of the alternator 6 is charged to the storage battery (battery) or the vehicle. Even when the electric load (for example, an air conditioner, a wiper, a defogger, etc.) mounted on the battery cannot be consumed, the increase in the power generation amount of the alternator 6 may be stopped or reduced.
- the oil heater 11 when the lubrication system of the internal combustion engine includes an oil heater 11 that heats the oil flowing out from the alternator 6 with electric power, the oil heater 11 is changed depending on the amount of power generation by the alternator 6. You may make it operate. In this case, since the oil is warmed not only by the heat generated by the alternator 6 but also by the heat of the oil heater 11, the temperature of the oil can be raised more rapidly.
- the oil heater 11 when sufficient electricity is stored in the battery, the oil heater 11 may be operated without increasing the power generation amount of the alternator 6.
- the power generation amount of the alternator 6 may be increased only when sufficient electricity is not stored in the battery (when the battery is in a chargeable state).
- an increase in engine output consumed for driving the alternator 6 can be suppressed to a minimum, so that an increase in fuel consumption accompanying an increase in power generation amount of the alternator 6 can be suppressed.
- the difference between the first embodiment and the present embodiment described above is that heat exchange between the alternator 6 and oil is prohibited when the temperature of the alternator 6 is low. That is, the difference between the first embodiment and the present embodiment is that oil flows around the alternator 6 when the temperature of the alternator 6 is low.
- FIG. 6 is a diagram showing a schematic configuration of a lubrication system for an internal combustion engine in the present embodiment.
- the same components as those in the first embodiment (see FIG. 1) described above are denoted by the same reference numerals.
- the internal combustion engine lubrication system of the present embodiment includes a bypass passage 12 for bypassing the alternator 6 and flowing oil, and a switching valve for flowing oil to either the alternator 6 or the bypass passage 12. 13.
- the switching valve 13 is an electric valve that is opened and closed by a step motor, a solenoid, or the like, and is controlled by the ECU 7.
- the alternator 6 Since the alternator 6 has a relatively large heat capacity, when the oil passes through the alternator 6 when the temperature of the alternator 6 is lower than the temperature of the oil, the heat of the oil is transmitted to the alternator 6. As a result, the temperature rise rate of the oil may decrease instead.
- the lubrication system for the internal combustion engine of the present embodiment when the temperature of the alternator 6 is lower than the temperature of the oil, it is possible to flow the oil bypassing the alternator 6. Accordingly, it is possible to avoid a decrease in the oil temperature increase rate.
- a method of determining whether or not the temperature of the alternator 6 is lower than the temperature of the oil a method of detecting the temperature of the alternator 6 and comparing it with the output signal of the oil temperature sensor 8 is conceivable.
- a method is used in which it is estimated that the temperature of the alternator 6 is lower than the temperature of the oil within a predetermined time from when the internal combustion engine 1 is started.
- the temperature of the alternator 6 is substantially equal to the temperature of the oil.
- the oil rises due to the compression heat and combustion heat of the internal combustion engine 1.
- the temperature of the alternator 6 hardly increases.
- the temperature of the oil tends to be higher than the temperature of the alternator 6 during and immediately after the internal combustion engine 1 is started.
- the time required from the start of the internal combustion engine 1 (start of cranking) until the temperature of the alternator 6 becomes equal to or higher than the temperature of the oil is experimentally obtained in advance, and the time is set to a predetermined time.
- FIG. 7 is a flowchart showing an oil temperature control routine in the present embodiment.
- the same reference numerals are assigned to the same processes as those in the oil temperature control routine (see FIG. 3) of the first embodiment described above.
- the ECU 7 executes the process of S301 after executing S101.
- the ECU 7 determines whether or not the internal combustion engine 1 is being started (when cranking is started).
- the ECU 7 executes the processing after S102. On the other hand, if a positive determination is made in S301, the ECU 7 proceeds to S302. In S302, the ECU 7 starts the counter C.
- the counter C is a counter that measures an elapsed time from the start of the internal combustion engine 1.
- the ECU 7 proceeds to S303 after executing the process of S302.
- the ECU 7 determines whether or not the measurement time C of the counter C is equal to or longer than the predetermined time C1.
- the ECU 7 proceeds to S305.
- the ECU 7 controls the switching valve 13 so as to cut off the oil flow to the alternator 6 (allowing oil flow to the bypass passage 12). In this case, since the oil flows without passing through the alternator 6, a situation in which the heat of the oil is taken away by the alternator 6 can be avoided.
- the ECU 7 may increase the power generation amount of the alternator 6 if the internal combustion engine 1 is in a start-completed state at the time of executing the process of S305. In that case, the time when the temperature of the alternator 6 becomes higher than the temperature of the oil can be advanced.
- the ECU 7 proceeds to S304.
- the ECU 7 controls the switching valve 13 so as to block the oil flow to the bypass passage 12 (allowing the oil flow to the alternator 6). In this case, since the oil flows through the alternator 6, the heat of the alternator 6 can be transmitted to the oil.
- ECU7 performs the process after S102, after performing the process of S304.
- the processing of S301-S305 is executed after the processing of S101 is executed, but the processing of S301-S305 may be executed when an affirmative determination is made in S104. . That is, only when the oil temperature (oil temperature) Toil is lower than the predetermined temperature T2, the processing of S301 to S305 may be executed.
- the processing after S102 may be replaced with the same processing as in the second embodiment described above.
- the temperature of the alternator 6 is estimated to be lower than the temperature of the oil for a predetermined time from the start of the internal combustion engine 1 and the oil is bypassed is described.
- a sensor alternativeator 6 for measuring the temperature of the alternator 6. If a sensor for measuring the temperature of the sensor itself or a sensor for measuring the temperature of the oil flowing out of the alternator 6 is provided), the oil will turn off the alternator 6 when the output signal of the sensor is lower than the oil temperature Toil. You may make it detour. Further, the oil may bypass the alternator 6 during the period from when the internal combustion engine 1 is started until the alternator 6 becomes operable.
- the amount of oil flowing through the alternator 6 may be a constant amount, or may be changed according to the difference between the temperature of the alternator 6 and the temperature of the oil.
- the amount of oil flowing through the alternator 6 may be made larger than when the temperature is small.
- the difference between the temperature of the alternator 6 and the temperature of the oil becomes smaller as the elapsed time from the start of the internal combustion engine 1 becomes longer. Therefore, when the elapsed time from the start of the internal combustion engine 1 is long, the amount of oil flowing through the alternator 6 may be increased compared to when the elapsed time is short.
- FIG. 8 is a diagram showing a schematic configuration of a lubrication system for an internal combustion engine in the present embodiment.
- the same components as those in the third embodiment (see FIG. 6) described above are denoted by the same reference numerals.
- the 8 includes an oil heater 11 for heating the oil flowing through the bypass passage 12.
- the oil heater 11 is an electric heater that converts electric energy generated by the alternator 6 and / or electric energy stored in the battery 14 into thermal energy.
- the ECU 7 blocks the flow of oil to the alternator 6 when the temperature of the alternator 6 is lower than the temperature of the oil (allows oil flow to the bypass passage 12).
- the control valve 13 is controlled so that the oil heater 11 is operated.
- the ECU 7 operates the oil heater 11 using the electric power of the battery 14 when the state of charge (SOC) of the battery 14 is equal to or greater than a predetermined lower limit amount, and the state of charge of the battery 14 is less than the lower limit amount. If so, the oil heater 11 may be operated by the electric power generated by the alternator 6. Further, the ECU 7 may operate the oil heater 11 using the electric power generated by the alternator 6 regardless of the state of charge of the battery 14.
- SOC state of charge
- the oil heater 11 is operated using the power of the battery 14, and after the power generation by the alternator 6 can be performed, the oil generated using the power generated by the alternator 6 is used.
- the heater 11 may be operated.
- the temperature of the oil can be raised to a desired temperature range at an earlier time. Note that if the power of the battery 14 is supplied to the oil heater 11 when the charge amount of the battery 14 is small, there is a possibility that the operation of the starter motor becomes unstable. Therefore, when the charge amount of the battery 14 is small, the battery 14 It is preferable to stop the operation of the oil heater 11 using electric power.
- FIG. 9 is a flowchart showing an oil temperature control routine in the present embodiment.
- the same reference numerals are assigned to the processes similar to those of the third embodiment (see FIG. 7) described above.
- the ECU 7 executes the process of S401 after executing S305.
- the ECU 7 determines whether or not power generation by the alternator 6 is possible. For example, the ECU 7 determines that the alternator 6 can generate electric power when the internal combustion engine 1 is in a start completed state and / or when the fluctuation amount of the engine speed is within a predetermined allowable range.
- the ECU 7 proceeds to S402, starts power generation by the alternator 6, and operates the oil heater 11 using the power generated by the alternator 6. At that time, the ECU 7 adds electric power necessary for the operation of the oil heater 11 to the power generation amount of the alternator 6. As a result, the oil temperature rise and the alternator 6 temperature rise can be promoted.
- the ECU 7 determines whether or not the state of charge (SOC) of the battery 14 is within an allowable range.
- SOC state of charge
- the allowable range in that case is a range of charge amount that can sufficiently cover the drive of the starter motor and the drive of the oil heater 11.
- the ECU 7 proceeds to S404.
- the ECU 7 operates the oil heater 11 using the electric power stored in the battery 14. As a result, the oil can be heated even in a situation where the oil cannot be heated using the heat generated by the alternator 6.
- ECU7 performs the process of S303 again, after performing the process of S402 or S404.
- the oil can be heated even when the oil cannot be heated by the heat generated by the alternator 6. As a result, the temperature of the oil rises to a desired temperature range earlier.
- the first to fourth embodiments described above can be implemented in combination as much as possible.
- the example in which the oil is heated by the alternator 6 and / or the oil heater 11 when the temperature of the oil is lower than the predetermined temperature T2 has been described. May be heated by the alternator 6 and / or the oil heater 11 when the value is larger than a predetermined upper limit value, or depending on the friction level, the oil temperature, and the oil pressure of the internal combustion engine 1.
- the predetermined temperature T2 may be corrected.
- the friction of the internal combustion engine 1 can be calculated using the intake air amount, fuel injection amount, engine speed, oil temperature, oil pressure, and the like as parameters.
- a model for calculating the friction of the internal combustion engine 1 may be obtained in advance by an adaptation operation using experiments or the like, and the friction of the internal combustion engine 1 may be obtained using the calculation model.
- the temperature of the oil can be quickly raised to a temperature range suitable for the properties of the oil. As a result, it is possible to avoid a situation where the oil is excessively heated or insufficient.
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Abstract
Description
潤滑油が循環する内燃機関と、
前記内燃機関の潤滑油と熱交換可能な発電機と、
前記発電機が発生した熱により潤滑油を昇温させるとともに、昇温後の潤滑油を前記内燃機関へ供給する制御手段と、
を備えるようにした。
先ず、本発明の第1の実施例について図1乃至図3に基づいて説明する。図1は、内燃機関の潤滑システムの概略構成を示す図である。図1において、内燃機関の潤滑システムは、内燃機関1の潤滑油としてのオイルを貯蔵するためのオイル貯蔵タンク2を備えている。オイル貯蔵タンク2は、内燃機関1の下部に取り付けられたオイルパンであってもよく、内燃機関1から分離して配置されるタンクであってもよい。
次に、本発明に係わる内燃機関の潤滑システムの第2の実施例について図4に基づいて説明する。ここでは、前述した第1の実施例と異なる構成について説明し、同様の構成については説明を省略する。
次に、本発明に係わる内燃機関の潤滑システムの第3の実施例について図6及び図7に基づいて説明する。ここでは、前述した第1の実施例と異なる構成について説明し、同様の構成については説明を省略する。
<実施例4>
次に、本実施例に係わる内燃機関の潤滑システムの第4の実施例について図8及び図9に基づいて説明する。ここでは、前述した第3の実施例と異なる構成について説明し、同様の構成については説明を省略する。
2 オイル貯蔵タンク
3 オイルポンプ
4 オイルフィルタ
5 オイルクーラ
6 オルタネータ
7 ECU
8 油温センサ
9 水温センサ
10 アクセルポジションセンサ
11 オイルヒータ
12 バイパス通路
13 切換弁
14 バッテリ
50 熱交換器
51 流量調整弁
Claims (10)
- 潤滑油が循環する内燃機関と、
前記内燃機関の潤滑油と熱交換可能な発電機と、
前記発電機が発生した熱により潤滑油を昇温させるとともに、昇温後の潤滑油を前記内燃機関へ供給する制御手段と、
を備えることを特徴とする内燃機関の潤滑システム。 - 請求項1において、前記制御手段は、潤滑油の温度が低いときは高いときに比べ、前記発電機の発電量を多くすることを特徴とする内燃機関の潤滑システム。
- 請求項1又は2において、前記制御手段は、前記発電機の温度が潤滑油の温度より低くなる期間は、前記発電機と熱交換される潤滑油の量を減少させることを特徴とする内燃機関の潤滑システム。
- 請求項3において、前記期間は、内燃機関の始動時から所定時間が経過するまでの期間であることを特徴とする内燃機関の潤滑システム。
- 請求項3又は4において、前記発電機を迂回して潤滑油を流通させるバイパス経路と、
前記発電機を経由する潤滑油の量と前記バイパス経路を流れる潤滑油の量とを変更する流量調整機構と、
を更に備え、
前記制御手段は、前記流量調整機構を制御することにより、前記発電機と熱交換される潤滑油の量を減少させることを特徴とする内燃機関の潤滑システム。 - 請求項2において、前記制御手段は、潤滑油の温度が予め定められた目標温度より低いことを条件に、前記発電機の発電量を増加させることを特徴とする内燃機関の潤滑システム。
- 請求項2において、前記制御手段は、前記内燃機関の負荷が予め定められた基準負荷より高くなったときは、前記発電機の発電量の増加を中止することを特徴とする内燃機関の潤滑システム。
- 請求項2において、前記制御手段は、前記発電機から給電される電気回路の許容給電量に対して前記発電機の発電量が多くなる場合は、前記発電機の発電量の増加を中止することを特徴とする内燃機関の潤滑システム。
- 請求項2において、潤滑油を電気エネルギにより加熱するヒータを更に備え、
前記制御手段は、前記発電機が発生した電力により前記ヒータを作動させることを特徴する内燃機関の潤滑システム。 - 請求項5において、前記バイパス通路に配置され、潤滑油を電気エネルギにより加熱するヒータを更に備え、
前記制御手段は、前記発電機と熱交換される潤滑油の量を減少させるときに前記ヒータを作動させることを特徴とする内燃機関の潤滑システム。
Priority Applications (5)
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CN2009801624230A CN102713175A (zh) | 2009-11-13 | 2009-11-13 | 内燃机的润滑系统 |
US13/509,171 US20130042825A1 (en) | 2009-11-13 | 2009-11-13 | Lubrication system of an internal combustion engine |
JP2011540371A JP5293835B2 (ja) | 2009-11-13 | 2009-11-13 | 内燃機関の潤滑システム |
EP09851280A EP2500535A4 (en) | 2009-11-13 | 2009-11-13 | INTERNAL COMBUSTION ENGINE LUBRICATION SYSTEM |
PCT/JP2009/069381 WO2011058650A1 (ja) | 2009-11-13 | 2009-11-13 | 内燃機関の潤滑システム |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2009/069381 WO2011058650A1 (ja) | 2009-11-13 | 2009-11-13 | 内燃機関の潤滑システム |
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WO2011058650A1 true WO2011058650A1 (ja) | 2011-05-19 |
Family
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PCT/JP2009/069381 WO2011058650A1 (ja) | 2009-11-13 | 2009-11-13 | 内燃機関の潤滑システム |
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US (1) | US20130042825A1 (ja) |
EP (1) | EP2500535A4 (ja) |
JP (1) | JP5293835B2 (ja) |
CN (1) | CN102713175A (ja) |
WO (1) | WO2011058650A1 (ja) |
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IT201900022197A1 (it) * | 2019-11-26 | 2021-05-26 | Fpt Motorenforschung Ag | Gruppo motore avente un motore ed un sistema di lubrificazione per distribuire olio lubrificante al motore |
BR102020006397A2 (pt) * | 2020-03-30 | 2021-10-13 | Robert Bosch Limitada | Sistema e método de lubrificação de motor de combustão interna |
EP4067632A1 (en) * | 2021-03-31 | 2022-10-05 | Volvo Truck Corporation | Method of managing the oil temperature of a transmission of a motor vehicle |
CN114204752A (zh) * | 2021-11-10 | 2022-03-18 | 华为数字能源技术有限公司 | 一种油温控制方法、控制器、动力总成及电动汽车 |
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Also Published As
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US20130042825A1 (en) | 2013-02-21 |
EP2500535A1 (en) | 2012-09-19 |
CN102713175A (zh) | 2012-10-03 |
JP5293835B2 (ja) | 2013-09-18 |
JPWO2011058650A1 (ja) | 2013-03-28 |
EP2500535A4 (en) | 2013-01-02 |
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