WO2020196155A1 - Dispositif de régulation de température de piston pour moteur à combustion interne - Google Patents

Dispositif de régulation de température de piston pour moteur à combustion interne Download PDF

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Publication number
WO2020196155A1
WO2020196155A1 PCT/JP2020/011971 JP2020011971W WO2020196155A1 WO 2020196155 A1 WO2020196155 A1 WO 2020196155A1 JP 2020011971 W JP2020011971 W JP 2020011971W WO 2020196155 A1 WO2020196155 A1 WO 2020196155A1
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WO
WIPO (PCT)
Prior art keywords
oil
piston
internal combustion
combustion engine
temperature
Prior art date
Application number
PCT/JP2020/011971
Other languages
English (en)
Japanese (ja)
Inventor
拓朗 三田
Original Assignee
いすゞ自動車株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by いすゞ自動車株式会社 filed Critical いすゞ自動車株式会社
Publication of WO2020196155A1 publication Critical patent/WO2020196155A1/fr

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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
    • F01M1/00—Pressure lubrication
    • F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
    • 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
    • F01M1/00—Pressure lubrication
    • F01M1/16—Controlling lubricant pressure or quantity
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/06—Arrangements for cooling pistons
    • F01P3/08—Cooling of piston exterior only, e.g. by jets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control

Definitions

  • the present invention relates to an internal combustion engine piston temperature control device that controls the temperature of an internal combustion engine piston by oil.
  • Patent Document 1 the first port, which is an inlet port connected to the pump discharge side, and the outlet port connected to the engine side by a switching valve composed of an electromagnetic three-way valve provided on the oil supply passage.
  • the engine oil control device for switching between the second port and the third port, which is an outlet port connected to the pump suction side, is disclosed.
  • An object of the present disclosure is to reduce the number of valves, suppress an increase in friction loss of an internal combustion engine due to a decrease in oil temperature, and suppress an increase in pressure at the discharge port of the oil pump. It is an object of the present invention to provide a piston temperature control device for an internal combustion engine capable of suppressing an increase in driving force.
  • the piston temperature control device for an internal combustion engine is a piston temperature control device for an internal combustion engine that controls the temperature of the piston of the internal combustion engine by oil, and has a suction port for sucking oil from an oil pan and the suction port.
  • An oil pump including a discharge port for discharging oil sucked from a port, a first flow path communicating the discharge port and the suction port, and a piston oil jet for injecting oil into the discharge port and the piston. It has a second flow path that communicates with the piston, a valve that switches between the two, and a control unit that controls the switching according to the temperature of the piston.
  • the number of valves can be reduced, an increase in friction loss of an internal combustion engine due to a decrease in oil temperature can be suppressed, and an increase in pressure at the discharge port of an oil pump can be suppressed. It is possible to suppress an increase in the driving force of the oil pump.
  • FIG. 1 is a block diagram showing a configuration of a piston temperature control device for an internal combustion engine according to an embodiment of the present disclosure.
  • FIG. 2A is a diagram showing a configuration of a relief valve according to an embodiment of the present disclosure.
  • FIG. 2B is a diagram showing a configuration of a relief valve according to the embodiment of the present disclosure.
  • FIG. 3 is a diagram showing changes in the pressure of the main oil gallery under the control of the piston temperature control device of the internal combustion engine according to the embodiment of the present disclosure, the piston temperature, the oil pan temperature, and the oil temperature of the main oil gallery.
  • the piston temperature control device 1 of the internal combustion engine includes an oil pump 10, a three-way valve 20, an oil filter 30, an oil filter 40, an oil cooler 50, a main oil gallery 60, and a sub oil gallery. It has a 70, a piston oil jet 80, a control unit 90, a temperature sensor 100, and a water temperature sensor 110.
  • the oil pump 10 includes a suction port 11 that pumps up and sucks the oil stored in the oil pan P, and a discharge port 12 that discharges the oil sucked from the suction port 11.
  • FIG. 2A shows a state in which the three-way valve 20 is switched to the flow path R2
  • FIG. 2B shows a state in which the three-way valve 20 is switched to the flow path R1.
  • the flow path R1 communicates the discharge port 12 and the suction port 11 via the three-way valve 20.
  • the flow path R2 communicates the discharge port 12 and the piston oil jet 80 via the three-way valve 20, the oil filter 40, and the sub oil gallery 70.
  • the flow path R1 and the flow path R2 can be switched by the three-way valve 20.
  • the three-way valve 20 is an ON / OFF valve or a proportional valve.
  • the three-way valve 20 includes an inflow port 21, an outflow port 22, an outflow port 23, and an actuator 24.
  • the three-way valve 20 is an example of a valve used in the present disclosure, and any valve such as a four-way valve that can switch a distribution path between four or more flow paths can be used. There may be.
  • the inflow port 21 communicates with the discharge port 12, and the oil discharged from the discharge port 12 flows in.
  • the outflow port 22 communicates with the suction port 11, and the oil flowing in from the inflow port 21 is supplied to the suction port 11.
  • the outflow port 23 communicates with the oil filter 40 and supplies the oil flowing in from the inflow port 21 to the oil filter 40.
  • the actuator 24 includes a cylindrical portion 241, a cylindrical portion 242, a cylindrical portion 241 and a cylindrical portion 242, and a connecting portion 243 having a smaller diameter than the cylindrical portion 241 and the cylindrical portion 242.
  • the actuator 24 connects the inlet 21 and the outlet 23 with the state shown in FIG. 2B in which the inlet 21 and the outlet 22 are communicated with each other via the space around the connecting portion 243 under the control of the control unit 90. It switches to the state shown in FIG. 2A in which communication is performed through the space around 243.
  • the oil filter 30 removes impurities and the like contained in the oil discharged from the discharge port 12 of the oil pump 10, and supplies the oil from which the impurities have been removed to the oil cooler 50.
  • the oil filter 40 removes impurities and the like contained in the oil supplied from the three-way valve 20, and supplies the oil from which the impurities have been removed to the sub oil gallery 70.
  • the oil cooler 50 cools the oil supplied from the oil filter 30 and supplies it to the main oil gallery 60.
  • the main oil gallery 60 supplies the oil supplied from the oil cooler 50 to an idle gear, a camshaft, etc. (not shown) and then stores the oil in the oil pan P.
  • the sub oil gallery 70 supplies the oil supplied from the oil filter 40 to the piston oil jet 80.
  • the piston oil jet 80 injects the oil supplied from the sub oil gallery 70 onto the back surface of the piston and stores it in the oil pan P.
  • the control unit 90 is composed of an electronic control device such as an ECU (Electronic Control Unit), and operates by executing a control program stored in a memory (not shown).
  • the control unit 90 captures detection signals of various sensors (not shown) for detecting the operating state of the internal combustion engine, performs a predetermined calculation based on the detection signals, and based on the calculation result, the three-way valve 20 Drive control is performed.
  • the control unit 90 estimates the piston temperature of the internal combustion engine based on the rotation speed of the internal combustion engine and the fuel injection amount. Specifically, the control unit 90 refers to a data table in which the rotation speed of the internal combustion engine, the fuel injection amount, and the piston temperature of the internal combustion engine are associated with each other, which is stored in advance in a memory (not shown).
  • the piston temperature of the internal combustion engine associated with the rotation speed of the internal combustion engine obtained from a crank angle sensor (not shown) and the fuel injection amount calculated based on an electric signal or the like acquired from an accelerator operation amount detection unit (not shown).
  • the piston temperature is estimated by obtaining it.
  • the control unit 90 controls the three-way valve 20 based on the estimated piston temperature.
  • the control unit 90 controls the three-way valve 20 based on the measurement result of the oil temperature input from the temperature sensor 100 or the measurement result of the cooling water temperature input from the water temperature sensor 110.
  • the temperature sensor 100 measures the temperature of the oil flowing from the oil filter 40 to the sub oil gallery 70, and outputs the measurement result to the control unit 90.
  • the water temperature sensor 110 measures the temperature of the cooling water that circulates to cool the internal combustion engine, and outputs the measurement result to the control unit 90.
  • the control unit 90 When the estimated piston temperature is lower than the predetermined temperature, the control unit 90 easily takes the heat in the cylinder of the internal combustion engine to the oil through the piston, so that the three-way valve 20 connects the inflow port 21 and the outflow port 23.
  • the state shown in FIG. 2B which is not communicated by the cylindrical portion 242 of the actuator 24, stops the injection of oil from the piston oil jet 80 to the piston (O / J cut).
  • the piston temperature can be raised to reduce the cooling loss in the cylinder of the internal combustion engine, and the piston temperature can be raised to reduce friction around the piston and improve fuel consumption.
  • the amount of heat given to the oil is reduced, the temperature of the oil circulating in the internal combustion engine is lowered. This is mainly because the heat radiation from the piston to the oil raises the oil temperature in the internal combustion engine.
  • the oil circulates around the oil pump 10 by making the inflow port 21 and the outflow port 22 communicate with each other through the space around the connecting portion 243 of the actuator 24 as shown in FIG. 2B.
  • the decrease in oil temperature can be suppressed as compared with the conventional case (broken line A in FIG. 3).
  • the piston temperature control device 1 of the internal combustion engine causes the three-way valve 20 to be in the state shown in FIG. 2B when the piston temperature is low, thereby injecting oil into the piston, resulting in a cooling loss in the cylinder of the internal combustion engine. It is possible to reduce the friction around the piston by increasing the piston temperature, and to suppress the increase in friction due to stopping the injection of oil to the piston.
  • the control unit 90 sets the three-way valve 20 to the inlet 21 and the outlet 23.
  • the state shown in FIG. 2A communicates with the space around the cylindrical portion 242 of the actuator 24.
  • the oil is injected from the piston oil jet 80 to the piston, so that the temperature of the oil can be raised by heat dissipation from the piston. Therefore, the viscosity of the oil can be reduced to reduce the friction loss of the internal combustion engine.
  • the flow path R1 communicating with the suction port 11 for sucking oil from the oil pan P and the discharge port 12 for discharging the oil sucked from the suction port 11 and the discharge port 12 It has a three-way valve 20 that switches between the flow path R2 that communicates with the piston oil jet 80 that injects oil into the piston, and the three-way valve 20 that switches between the flow path R1 and the flow path R2 according to the temperature of the piston.
  • the number of valves can be reduced, the increase in friction loss of the internal combustion engine due to the decrease in oil temperature can be suppressed, and the pressure at the discharge port of the oil pump can be increased. It can be suppressed to suppress an increase in the driving force of the oil pump.
  • the piston temperature control device 1 of the internal combustion engine can have a simple configuration.
  • the pressure in the oil flow path is reduced by turning off the oil check valve 60 and turning on the relief valve 20 at the same time. It is possible to control the opening and closing of the oil check valve 60 and the opening and closing of the relief valve 20 without changing.
  • the three-way valve 20 when the three-way valve 20 is composed of a proportional valve, a sensor for detecting the temperature or viscosity of the oil is provided, and the pressure in the oil flow path is determined according to the detection result of the sensor.
  • the three-way valve 20 can be controlled so that
  • the three-way valve 20 is closed when the temperature of the piston is lower than the predetermined temperature, but the three-way valve 20 may be closed due to a factor other than the temperature of the piston. For example, when the oil pressure is too high, the three-way valve 20 may be opened to protect the oil pump 10, the oil filter 30, the oil cooler 50, and the like.
  • the piston temperature control device for an internal combustion engine is suitable for controlling the temperature of a piston of an internal combustion engine with oil.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

La présente invention concerne un dispositif de régulation de température de piston pour moteur à combustion interne, caractérisé par un nombre réduit de valves, un accroissement minimal des pertes par frottement dans le moteur à combustion interne causé par une diminution de la température d'huile, une élévation minimale de la pression dans un orifice de refoulement d'une pompe à huile, et un accroissement minimal de la force d'entraînement de la pompe à huile. Un dispositif (1) de régulation de température de piston pour moteur à combustion interne selon l'invention comprend: une pompe (10) à huile munie d'un orifice (11) d'admission à travers lequel de l'huile est admise en provenance d'un carter (P) d'huile, et un orifice (12) de refoulement qui refoule l'huile admise à travers l'orifice (11) d'admission; une vanne (20) à trois voies qui effectue un aiguillage entre un conduit (R1) d'écoulement qui permet la communication entre l'orifice (12) de refoulement et l'orifice (11) d'admission, et un conduit (R2) d'écoulement qui permet la communication entre l'orifice (12) de refoulement et un jet (80) d'huile de piston qui pulvérise de l'huile sur un piston; et une unité (90) de commande qui commande l'aiguillage de la vanne (20) en fonction de la température du piston.
PCT/JP2020/011971 2019-03-22 2020-03-18 Dispositif de régulation de température de piston pour moteur à combustion interne WO2020196155A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2019-054516 2019-03-22
JP2019054516A JP2020153338A (ja) 2019-03-22 2019-03-22 内燃機関のピストン温度制御装置

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WO2020196155A1 true WO2020196155A1 (fr) 2020-10-01

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003343231A (ja) * 2002-05-30 2003-12-03 Moric Co Ltd ２サイクルエンジンのオイル制御装置
JP2011127571A (ja) * 2009-12-21 2011-06-30 Daihatsu Motor Co Ltd 内燃機関の早期暖機制御方法
JP2012145021A (ja) * 2011-01-11 2012-08-02 Mitsubishi Heavy Ind Ltd エンジンの冷却装置
JP2017198076A (ja) * 2016-04-25 2017-11-02 三菱自動車工業株式会社 ピストンの冷却装置
JP2018131941A (ja) * 2017-02-14 2018-08-23 株式会社豊田自動織機 内燃機関の制御装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003343231A (ja) * 2002-05-30 2003-12-03 Moric Co Ltd ２サイクルエンジンのオイル制御装置
JP2011127571A (ja) * 2009-12-21 2011-06-30 Daihatsu Motor Co Ltd 内燃機関の早期暖機制御方法
JP2012145021A (ja) * 2011-01-11 2012-08-02 Mitsubishi Heavy Ind Ltd エンジンの冷却装置
JP2017198076A (ja) * 2016-04-25 2017-11-02 三菱自動車工業株式会社 ピストンの冷却装置
JP2018131941A (ja) * 2017-02-14 2018-08-23 株式会社豊田自動織機 内燃機関の制御装置

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