WO2010128549A1 - エンジンの冷却装置 - Google Patents
エンジンの冷却装置 Download PDFInfo
- Publication number
- WO2010128549A1 WO2010128549A1 PCT/JP2009/058657 JP2009058657W WO2010128549A1 WO 2010128549 A1 WO2010128549 A1 WO 2010128549A1 JP 2009058657 W JP2009058657 W JP 2009058657W WO 2010128549 A1 WO2010128549 A1 WO 2010128549A1
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- WIPO (PCT)
- Prior art keywords
- engine
- flow rate
- refrigerant
- water
- cooling
- 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
- 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
- F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/04—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids
- F01N3/043—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust using liquids without contact between liquid and exhaust gases
- F01N3/046—Exhaust manifolds with cooling jacket
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- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/08—Cabin heater
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- 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
- F01P2060/00—Cooling circuits using auxiliaries
- F01P2060/16—Outlet manifold
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the present invention relates to an engine cooling device, and more particularly to an engine cooling device provided with an exhaust system cooling means for cooling an engine exhaust system with a circulating refrigerant.
- Patent Literature 1 discloses a technology considered to be related to the present invention.
- Patent Document 1 discloses an exhaust manifold device including a water jacket formed around an exhaust manifold and water injection means for injecting water into the water jacket in a spray form.
- Patent Document 2 discloses a cooling control device for an internal combustion engine provided with a flow rate control valve that can change the supply ratio of the cooling medium to a plurality of cooling units. ing.
- Patent Document 2 discloses a cooling control device for an internal combustion engine in which a flow rate control valve is provided in each cooling water passage that guides cooling water to a plurality of cooling units such as exhaust ports.
- the exhaust system is used for the purpose of suitably balancing exhaust emissions in the light and medium load operating range where the catalyst is warmed up early and further reducing exhaust emissions during high load operation. It is considered that the exhaust gas is cooled with a refrigerant to lower the exhaust temperature. In this way, it is possible to suppress overheating of the catalyst. Therefore, in this way, the catalyst can be arranged close to the engine, so that the exhaust emission in the light and medium load operation region where the catalyst is warmed up early and the exhaust emission during the high load operation are updated. It is also possible to achieve both reductions that are suitable.
- the exhaust system when the exhaust system is cooled with a refrigerant in this way, it is reasonable from the viewpoint of cost and the like to use the same refrigerant as the refrigerant flowing through the engine body (for example, a long life coolant that is engine cooling water). it is conceivable that.
- the refrigerant circulating in the engine body is generally pumped by a mechanical water pump driven by the output of the engine. For this reason, when using a refrigerant common to the refrigerant flowing through the engine body, it is considered reasonable to use a mechanical water pump as the refrigerant pressure feeding device from the viewpoint of cost.
- the refrigerant flowing through the engine body is generally cooled by a cooler (for example, a radiator).
- the refrigerant temperature in the part of the engine body on the outlet side or the distribution path immediately after flowing through the engine body is generally detected as the refrigerant temperature in the engine body (hereinafter referred to as engine refrigerant temperature).
- engine refrigerant temperature the refrigerant temperature in the engine body
- the engine refrigerant temperature does not represent the refrigerant temperature in the exhaust system cooling means (hereinafter referred to as the exhaust system refrigerant temperature).
- the exhaust system refrigerant temperature tends to be larger than the engine refrigerant temperature.
- the exhaust system cooling means is usually smaller in size than the engine body, and thus the exhaust system cooling means has a smaller heat capacity than the engine body.
- the refrigerant may overheat or boil in the exhaust system cooling means.
- the following measures may be taken.
- the exhaust system refrigerant temperature is higher by a certain degree than the engine refrigerant temperature with respect to the average temperature after completion of warm-up. For this reason, it can be considered that the engine coolant temperature may be reset to a certain degree higher than the actually detected temperature.
- the discharge amount of the mechanical water pump generally increases or decreases in proportion to the engine speed. For this reason, when the operating state of the engine is high rotation and high load, the flow rate of the refrigerant in the exhaust system cooling means also increases.
- the amount of intake air is large and the amount of heat generated by the engine is large, the amount of heat received by the exhaust system cooling means from the exhaust gas also increases. For this reason, in this case, in the exhaust system cooling means, heat is accumulated in the wall portion forming the flow path through which the exhaust gas flows, and as a result, the wall portion becomes high temperature.
- the engine operating state has shifted from a high rotation / high load operation state to a low rotation / high load operation state.
- the above-mentioned wall part is maintained in a high temperature state for a while.
- the flow rate of the refrigerant in the exhaust system cooling means decreases as the engine speed decreases.
- the exhaust system cooling means a situation occurs in which the amount of heat received from the exhaust gas exceeds the amount of heat released by the refrigerant. That is, in this case, the refrigerant flow rate in the exhaust system cooling means temporarily becomes insufficient with respect to the heat generation amount of the engine.
- an object of the present invention is to provide an engine cooling device that can prevent or suppress boiling.
- the present invention for solving the above problems includes a refrigerant pressure feeding device that pumps a common refrigerant to a plurality of refrigerant circulation paths, and an engine body incorporated in at least one refrigerant circulation path among the plurality of refrigerant circulation paths.
- An exhaust system cooling means that is incorporated in at least one refrigerant circulation path among the plurality of refrigerant circulation paths, has a smaller heat capacity than the engine body, and cools the exhaust system of the engine with a circulating refrigerant; Of the plurality of refrigerant circulation paths, a refrigerant that is incorporated in at least one refrigerant circulation path and cools the circulating refrigerant, and the flow rate of the refrigerant that is circulated to the exhaust system cooling means based on the intake air amount of the engine. And a flow rate determining means for determining the engine.
- the present invention provides a refrigerant pressure feeding device that pumps a common refrigerant to a plurality of refrigerant circulation paths, an engine in which an engine body is incorporated in at least one refrigerant circulation path among the plurality of refrigerant circulation paths, and the plurality of refrigerants Among the circulation paths, the exhaust system cooling means is incorporated in at least one refrigerant circulation path, has a heat capacity smaller than that of the engine body, and cools the exhaust system of the engine with the circulating refrigerant, and the plurality of refrigerant circulation paths Among them, the flow rate of the refrigerant to be circulated to the exhaust system cooling means based on the cooler that is incorporated in at least one refrigerant circulation path and cools the circulating refrigerant, and the amount of heat received from the exhaust by the exhaust system cooling means. And a flow rate determining means for determining the engine.
- the present invention provides an estimating means for estimating the temperature of the wall portion forming the flow path through which the exhaust gas flows, and the flow rate of the refrigerant determined by the flow rate determining means based on the estimation.
- the configuration further includes correction means for correcting.
- the exhaust system cooling means when the exhaust system cooling means for cooling the exhaust system of the engine with the refrigerant common to the refrigerant flowing through the engine body is provided, the exhaust system cooling means can prevent or suppress the refrigerant from overheating or boiling.
- FIG. 1 is a diagram schematically showing an engine cooling device (hereinafter simply referred to as a cooling device) 100A according to Embodiment 1.
- a cooling device 100A according to Embodiment 1.
- FIG. 1 piping and the like constituting the cooling water circulation path during cold when the thermostat 60 is closed are indicated by broken lines, and piping and the like constituting the cooling water circulation path during warming when the thermostat 60 is opened are indicated by solid lines. While showing each, the flow direction of the cooling water W is shown with the arrow with respect to these. This also applies to FIGS. 5 to 10.
- 1 is a diagram schematically showing a water-cooled exhaust manifold 30.
- FIG. FIG. 4 is a diagram showing the flow rate characteristics of cooling water W flowing through the water-cooled exhaust manifold 30. It is a figure which shows the flow volume variable structure 70 typically.
- FIG. 1 is a diagram schematically showing a specific configuration of an ECU (Electronic Control Unit) 1A.
- ECU Electronic Control Unit
- FIG. 1 It is a figure which shows the relationship between (ethw + etha) * NE / 100 * GA and actual cooling loss Qw.
- R 2 is a value indicating the degree of correlation, and the closer to 1, the higher the degree of correlation.
- FIG. It is a figure which shows operation
- a solid line indicates a case where the operating state of the engine 20 has shifted from a high rotation / high load operation state to a low rotation / non-high operation state, and a broken line represents a low rotation from a high rotation / high load operation state.
- the figure shows the change when moving to a high-load operating state.
- the water-cooled exhaust manifold 30 is visualized by providing a window, and the cooling water W in the water-cooled exhaust manifold 30 is observed according to the intake air amount GA, and the water temperature in the water-cooled exhaust manifold 30 is measured. It is the figure put together. It is a figure which shows variable type water pump pulley 76 with belt 73B typically.
- (a) shows the pulley 76 in a state where each pulley member 76a is in contact
- the cooling device 100A will be described with reference to FIGS.
- the cooling device 100 ⁇ / b> A includes an ECU 1 ⁇ / b> A, a water pump 10, an engine 20, a water-cooled exhaust manifold 30, a heater core 40, a radiator 50, and a thermostat 60.
- the water pump 10 is assembled to the engine 20.
- the water pump 10 is a mechanical pump that is driven by the output of the engine 20 and pumps the cooling water W that is a refrigerant.
- the discharge amount of the water pump 10 increases or decreases in proportion to the rotational speed NE of the engine 20.
- the engine 20 has an engine body 21.
- the engine main body 21 includes a cylinder head and a cylinder block (not shown).
- a water jacket 22, a bypass passage 23, and a communication passage 24 are formed in the engine body 21. Cooling water W flows through the water jacket 22, and the cooling water W flowing through the water jacket 22 cools the engine body 21.
- the bypass passage 23 circulates the cooling water W from the water jacket 22 to the thermostat 60.
- the bypass passage 23 communicates the outlet side portion of the water jacket 22 with the outside.
- the communication passage 24 communicates the inlet side portion of the bypass passage 23 and the outside.
- the engine main body 21 is provided with a water temperature sensor 91 that detects a cooling water temperature THW that is the temperature of the cooling water W, and an engine speed sensor 92 that is used to detect the speed NE of the engine 20.
- the water temperature sensor 91 is provided so as to detect the cooling water temperature THW at the outlet side of the water jacket 22.
- the water-cooled exhaust manifold 30 is assembled to the engine body 21.
- the water-cooled exhaust manifold 30 joins exhaust exhausted from the cylinders of the engine 20.
- the water-cooled exhaust manifold 30 includes an outer wall portion 302 that entirely encloses a plurality of exhaust pipes 301.
- the outer wall portion 302 forms a cooling water flow path with the plurality of exhaust pipes 301.
- the cooling water W is supplied from the cooling water introduction port 303 to the cooling water passage, and the cooling water W is discharged from the cooling water passage through the cooling water discharge port 304.
- the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 increases and decreases in proportion to the rotational speed NE of the engine 20 (see FIG. 3).
- the water-cooled exhaust manifold 30 is an exhaust system cooling means, and the plurality of exhaust pipes 301 are wall portions that form flow paths through which exhaust gas flows.
- the heater core 40 exchanges heat between the cooling water W and air.
- the heater core 40 is used in an air conditioner (not shown).
- the air conditioner functions as a heating device by blowing air heated by the heater core 40 into the vehicle interior of the vehicle.
- the radiator 50 promotes heat radiation from the cooling water W that is circulated by running wind or air blown by an electric fan (not shown), and cools the cooling water W.
- the radiator 50 is a cooler.
- the thermostat 60 is operated to control the circulation of the cooling water W by closing the valve when cold and opening the valve when warm.
- the cooling device 100A includes a variable flow rate structure 70 shown in FIG.
- the variable flow rate structure 70 can control the rotational speed of the water pump 10 in accordance with, for example, the intake air amount GA, the load factor of the engine 20, and the pressure of the intake pipe.
- the variable flow rate structure 70 makes the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 variable by enabling the rotation speed control of the water pump 10.
- the variable flow rate structure 70 includes a crank pulley 71, a water pump pulley 72, a belt 73, an idler pulley 74, and an actuator 75.
- the pulley 71 is connected to a crankshaft (not shown) of the engine 20.
- the pulley 72 is connected to the rotating shaft of the water pump 10.
- the pulley 72 has a truncated cone shape, and its diameter gradually decreases from one end in the axial direction to the other end.
- the belt 73 has a ring shape and is hung on these pulleys 71 and 72.
- the fixed position of the belt 73 on the pulley 72 is one end side.
- the pulley 74 is provided between the pulleys 71 and 72 so as to contact the belt 73.
- the pulley 74 is connected to the actuator 75.
- the actuator 75 is provided so that the pulley 74 can be driven along the direction in which the belt 73 can be pressurized.
- a step motor combined with a linear motion mechanism can be used.
- variable flow rate structure 70 The operation of the variable flow rate structure 70 is as follows. During the operation of the engine 20, the pulley 71 rotates together with the crankshaft. The rotation of the pulley 71 is transmitted to the pulley 72 via the belt 73. And if the pulley 72 rotates, the water pump 10 will drive according to this. At this time, the water pump 10 pumps the cooling water W at a discharge amount corresponding to the rotational speed NE. On the other hand, when the actuator 75 drives the pulley 74 and presses the pulley 74 against the belt 73, the tension of the belt 73 increases.
- the belt 73 when the belt 73 is pushed by the pulley 74 as shown by a broken line, the belt 73 slides on the pulley 72 from one end side to the other end side having a smaller diameter. Thereby, the diameter of the pulley 72 corresponding to the belt 73 is reduced. Therefore, this increases the rotation of the water pump 10 and increases the discharge amount.
- the discharge amount of the water pump 10 can be decreased by operating the actuator 75 in the reverse direction.
- the cooling device 100A has first to sixth cooling water circulation paths 81 to 86 corresponding to a plurality of refrigerant circulation paths as shown in FIGS.
- the first, second, and third cooling water circulation paths 81, 82, and 83 are circulation paths that permit the circulation of the cooling water W when the thermostat 60 is closed.
- the fourth, fifth, and sixth cooling water circulation paths 84, 85, 86 are circulation paths that permit the circulation of the cooling water W when the thermostat 60 is opened.
- the water pump 10 pumps the common cooling water W to these cooling water circulation paths 81 to 86.
- the water pump 10 is a refrigerant pressure feeding device.
- any of the water pump 10, the engine 20, the water-cooled exhaust manifold 30, the heater core 40, the radiator 50, and the thermostat 60 is appropriately incorporated in the plurality of cooling water circulation paths 81 to 86.
- these components are connected to each other directly or via piping. Next, the cooling water circulation paths 81 to 86 will be described more specifically.
- the first cooling water circulation path 81 is a circulation path in which the water pump 10, the engine body 21, the heater core 40, and the thermostat 60 are incorporated, and the cooling water W flows in this order. Further, when the engine main body 21 is circulated, the cooling water W specifically circulates through the water jacket 22.
- the second cooling water circulation path 82 is a circulation path in which the water pump 10, the engine main body 21, and the thermostat 60 are incorporated, and the cooling water W circulates in this order. Further, when the engine body 21 is circulated, the cooling water W specifically circulates through the water jacket 22 and the bypass passage 23 in this order.
- the third cooling water circulation path 83 is a circulation path in which the water pump 10, the water-cooled exhaust manifold 30, the engine body 21, and the thermostat 60 are incorporated, and the cooling water W circulates in this order. Yes. Further, when the engine main body 21 is circulated, the cooling water W specifically circulates through the communication path 24 and the bypass path 23 in this order.
- the first to third cooling water flow paths 81 to 83 are circulation paths that do not include the radiator 50.
- the fourth cooling water circulation path 84 is a circulation path in which the water pump 10, the engine body 21, the heater core 40, and the thermostat 60 are incorporated, and the cooling water W flows in this order. Further, when the engine main body 21 is circulated, the cooling water W specifically circulates through the water jacket 22.
- the fifth cooling water circulation path 85 is a circulation path in which the water pump 10, the engine body 21, the radiator 50, and the thermostat 60 are incorporated, and the cooling water W flows in this order. Further, when the engine main body 21 is circulated, the cooling water W specifically circulates through the water jacket 22.
- the sixth cooling water circulation path 86 is a circulation path in which the water pump 10, the water-cooled exhaust manifold 30, the radiator 50, and the thermostat 60 are incorporated, and the cooling water W flows in this order. Yes.
- variable flow rate structure 70 can appropriately change the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 both when the thermostat 60 is opened and when it is closed (that is, during operation of the engine 20). ing.
- the ECU 1A includes a microcomputer including a CPU 2, a ROM 3, a RAM 4, and the like, and input / output circuits 5 and 6.
- the CPU 2, ROM 3, RAM 4, and input / output circuits 5 and 6 are connected to each other via a bus 7.
- the ECU 1A is mainly configured to control the engine 20. Specifically, the ECU 1A is configured to control a fuel injection valve (not shown), for example. In addition, the ECU 1A is configured to control the actuator 75. These objects to be controlled are electrically connected to the ECU 1A.
- Various types of sensors such as a water temperature sensor 91, an engine speed sensor 92, an air flow meter 93 (more specifically, an intake air amount sensor 93a and an intake air temperature sensor 93b), and a throttle opening sensor 94 are electrically connected to the ECU 1A. Connected.
- the cooling water temperature THW is based on the output of the water temperature sensor 91
- the rotational speed NE is based on the output of the engine rotational speed sensor 92
- the intake air amount GA and the intake air temperature THA of the engine 20 are based on the output of the air flow meter 93.
- the opening TA of a throttle valve (not shown) for adjusting the amount GA is detected by the ECU 1A based on the output of the throttle opening sensor 94.
- the ROM 3 is configured to store a program in which various processes executed by the CPU 2 are described, map data, and the like.
- various control means, determination means, detection means, calculation means, and the like are functional in the ECU 1A. To be realized.
- the water-cooled exhaust manifold 30 receives the refrigerant from the exhaust.
- An estimation means for estimating the cooling loss Qw that is the amount of heat received (hereinafter referred to as cooling loss estimation means) is functionally realized.
- the plurality of estimation factors described above include the intake air amount GA because the intake air amount GA has a high linear correlation with the cooling loss Qw.
- the plurality of estimation factors described above preferably further include at least one of the coolant temperature THW, the intake air temperature THA, or the rotational speed NE, which is the refrigerant temperature. This is because these four factors have a great influence on the cooling loss Qw.
- the cooling loss Qw is also different.
- the coolant temperature THW and the intake air temperature THA can represent the operating environment conditions of the engine 20.
- the rotational speed NE can represent the magnitude of the friction of the engine 20. For this reason, in estimating the cooling loss Qw with higher accuracy, it is preferable to further include at least one of the cooling water temperature THW, the intake air temperature THA, and the rotational speed NE.
- the cooling loss Qw (THW + THA) ⁇ NE ⁇ GA (1) That is, the cooling loss Qw is most preferably estimated based on a value calculated by the product of the sum of the coolant temperature THW and the intake air temperature THA, the rotational speed NE, and the intake air amount GA. This is because the highest linearity between the actual cooling loss Qw when the cooling loss Qw is estimated based on the expression (1) as a result of the bench test of the engine 20 including the steady state and the transient state in the operating state. This is because a general correlation was observed (see FIG. 12). Therefore, the ECU 1A specifically estimates the cooling loss Qw based on the formula (1).
- a determination means for determining the operation state of the engine 20 a means for determining whether the operation state of the engine 20 is a steady state or a transient state based on the throttle valve opening change ⁇ TA (hereinafter referred to as a transient state). , Referred to as first operating state determination means) is functionally realized. Specifically, the first operating state determination means determines that the steady state is obtained when the opening change ⁇ TA is equal to or less than a predetermined value, and is a transient state when the opening change ⁇ TA is less than the predetermined value. Realized to determine.
- the ECU 1A functionally realizes a determination means (hereinafter referred to as a first flow rate determination means) for determining the flow rate of the cooling water W to be circulated through the water-cooled exhaust manifold 30 based on the intake air amount GA.
- the first flow rate determining means determines the flow rate of the cooling water W to be circulated to the water-cooled exhaust manifold 30 based on the intake air amount GA when the operating state of the engine 20 is a steady state. To be realized.
- the ECU 1A functionally realizes a determination means (hereinafter referred to as a second flow rate determination means) for determining the flow rate of the cooling water W to be circulated through the water-cooled exhaust manifold 30 based on the cooling loss Qw.
- the second flow rate determining means is a flow rate of the cooling water W to be circulated to the water-cooled exhaust manifold 30 based on the cooling loss Qw estimated by the cooling loss estimating means when the operating state of the engine 20 is a transient state. Realized to determine.
- control means for controlling the flow rate of the cooling water W (hereinafter referred to as flow rate control means) is functionally realized.
- the flow rate control means uses the variable flow rate structure 70 (specifically, the actuator 75) as a control target, and the first or second flow rate determination means determines the flow rate of the cooling water W to be circulated through the water-cooled exhaust manifold 30. It is realized to perform control to achieve the determined flow rate. Note that the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 is determined and controlled simultaneously by determining and controlling the discharge amount of the water pump 10.
- step S1 The ECU 1A detects the throttle opening TA and calculates the throttle opening change ⁇ TA (step S1). Subsequently, the ECU 1A determines whether or not the calculated opening change ⁇ TA is equal to or less than a predetermined value (step S2). If an affirmative determination is made in step S2, it is determined that the operating state of the engine 20 is in a steady state. At this time, the ECU 1A detects the intake air amount GA (step S3).
- the ECU 1A determines the discharge amount of the water pump 10 based on the detected intake air amount GA (step S4). At this time, the ECU 1A specifically determines the discharge amount of the water pump 10 based on a cooling water flow rate characteristic (hereinafter referred to as a first cooling water flow rate characteristic) corresponding to the intake air amount GA. Subsequently, the ECU 1A controls the actuator 75 to change the discharge amount of the water pump 10 to the determined discharge amount (step S8). After step S8, this flowchart is temporarily terminated.
- a cooling water flow rate characteristic hereinafter referred to as a first cooling water flow rate characteristic
- step S2 it is determined that the operating state of the engine 20 is in a transient state.
- the ECU 1A detects the coolant temperature THW, the intake air temperature THA, the rotational speed NE, and the intake air amount GA (step S5). Subsequently, the ECU 1A calculates (estimates) the cooling loss Qw based on the equation (1) (step S6). Further, the ECU 1A determines the discharge amount of the water pump 10 based on the calculated cooling loss Qw (step S7).
- the ECU 1A specifically determines the discharge amount of the water pump 10 based on the cooling water flow characteristic (hereinafter referred to as the second cooling water flow characteristic) according to the cooling loss Qw. After step S7, the process proceeds to step S8.
- the cooling water flow characteristic hereinafter referred to as the second cooling water flow characteristic
- the above-mentioned first cooling water flow rate characteristic is defined by map data stored in the ROM 3 in advance.
- the discharge amount of the water pump 10 is set to increase or decrease in proportion to the intake air amount GA.
- the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 is set so as to increase or decrease in proportion to the intake air amount GA.
- the above-described second cooling water flow rate characteristic is defined by map data stored in advance in the ROM 3. In this map data, the discharge amount of the water pump 10 is set to increase or decrease in proportion to the cooling loss Qw.
- the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 at the same time is set to increase or decrease in proportion to the cooling loss Qw.
- the first and second cooling water flow rate characteristics can be provided, for example, every cold time and warm time when the flow mode of the cooling water W is switched between the plurality of cooling water circulation paths 81 to 86. As a result, even when the flow mode of the cooling water W is switched, the flow rate variable structure 70 can perform more appropriate flow rate control.
- the cooling device 100A in order to prevent or suppress the overheating of the cooling water W in the water-cooled exhaust manifold 30, when changing the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30, for example, the flow rate is proportional to the rotational speed NE. It is also possible to increase or decrease.
- the intake air amount GA has an extremely high linear correlation with the actual cooling loss Qw (see FIG. 14).
- the cooling water flow rate characteristic is a characteristic capable of increasing or decreasing the flow rate of the cooling water W in proportion to the intake air amount GA that is substantially equal to the exhaust gas amount. It can be said.
- the ECU 1A determines the discharge amount of the water pump 10 (in other words, the flow rate of the cooling water W to be circulated through the water-cooled exhaust manifold 30) based on the first cooling water flow rate characteristic in the steady state. And change. That is, in the cooling device 100A, regardless of the rotational speed NE or the exhaust temperature, the larger the amount of heat generated, the larger the amount of heat generated, according to the amount of heat generated by the engine 20 in the steady state. The flow rate can be increased appropriately. For this reason, the cooling device 100A can suitably prevent or suppress the cooling water W from overheating or boiling in the water-cooled exhaust manifold 30 in a steady state. More specifically, for example, this reduces the exhaust gas cooling efficiency of the water-cooled exhaust manifold 30, reduces the durability or reliability of the water-cooled exhaust manifold 30 due to thermal distortion, Deterioration can be prevented or suppressed.
- the cooling loss Qw based on the equation (1) has a high linear correlation with the actual cooling loss Qw during the transition as shown in FIG.
- the ECU 1A determines and changes the discharge amount of the water pump 10 (in other words, the flow rate of the cooling water W to be circulated through the water-cooled exhaust manifold 30) based on the second cooling water flow rate characteristic during the transition. To do.
- the flow rate of the cooling water W circulated through the water-cooled exhaust manifold 30 can be appropriately increased as the heat generation amount is larger in accordance with the heat generation amount of the engine 20 in a transient state.
- the cooling device 100A can suitably prevent or suppress the cooling water W from overheating or boiling in the water-cooled exhaust manifold 30 even during a transition.
- the cooling device 100 ⁇ / b> A includes a variable flow rate structure 70. Therefore, the cooling device 100 ⁇ / b> A can change the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 even when the cooling water W is pumped by the mechanical water pump 10.
- a flow rate of the cooling water W corresponding to the maximum heat generation amount of the engine 20 may be set.
- the flow rate of the cooling water W becomes unnecessarily large at the time of transition in which the heat generation amount is relatively small. Therefore, in this case, the water-cooled exhaust manifold 30 falls into a supercooled state, and as a result, the fuel consumption of the engine 20 and the durability or reliability of the water-cooled exhaust manifold 30 may be adversely affected.
- the ECU 1A changes the flow rate of the cooling water W according to the heat generation amount of the engine 20 in a transient state. Therefore, the cooling device 100A can prevent or suppress the water-cooled exhaust manifold 30 from falling into the supercooled state.
- the cooling device 100B according to the present embodiment is substantially the same as the cooling device 100A except that the ECU 1B is provided instead of the ECU 1A.
- the ECU 1B is substantially the same as the ECU 1A except that the determination means, estimation means, and correction means described below are further functionally realized. For this reason, in this embodiment, the cooling device 100B and the ECU 1B are not shown.
- a means for determining whether or not the operating state of the engine 20 is a high rotation and high load based on the intake air amount GA (hereinafter referred to as second operating state determination). (Referred to as means) is functionally realized. Specifically, the second operating state determination means determines that the high rotation and high load is obtained when the intake air amount GA is equal to or greater than a predetermined value, and the high rotation height when the intake air amount GA is less than the predetermined value. It is realized to determine that it is not a load.
- estimation means that estimates the temperature of a wall portion (specifically, a plurality of exhaust pipes 301) that forms a flow path through which exhaust gas flows in the water-cooled exhaust manifold 30. (Referred to as means) is functionally realized. Specifically, in the present embodiment, the wall temperature estimating means is implemented so as to estimate that the wall is hot when the operating state of the engine 20 is a high rotation and high load.
- the ECU 1B corrects the discharge amount of the water pump 10 determined by the flow rate determining means according to the operating state of the engine 20 out of the first or second flow rate determining means based on the estimation of the wall temperature estimating means.
- Means (hereinafter referred to as flow rate correction means) are functionally realized.
- the flow rate of the cooling water W flowing through the water-cooled exhaust manifold 30 is corrected at the same time by correcting the discharge amount of the water pump 10.
- the flow rate correcting means is realized as follows. That is, the flow rate correcting means calculates the integrated intake air amount ⁇ GA by integrating the intake air amount GA when the wall portion is hot. Then, the flow rate correction means sets the flow rate correction amount according to the calculated integrated intake air amount ⁇ GA to the cooling water flow rate characteristic according to the operating state of the engine 20 among the first or second cooling water flow rate characteristics. It adds to the discharge amount of the water pump 10. When the wall temperature is no longer high, the flow rate correction means updates the integrated intake air amount ⁇ GA by subtracting the current intake air amount GA from the integrated intake air amount ⁇ GA.
- the flow rate correction means sets the flow rate correction amount corresponding to the integrated intake air amount ⁇ GA in the first or second cooling water flow rate characteristics. It adds to the flow volume of the cooling water W set to the cooling water flow volume characteristic according to the driving
- the ECU 1B first detects the intake air amount GA (step S11). Subsequently, the ECU 1B determines whether or not the detected intake air amount GA is equal to or greater than a predetermined value that is a determination threshold value for high load determination (step S12). If an affirmative determination is made in step S12, it is determined that the operating state of the engine 20 is a high rotation high load. Moreover, if it is affirmation determination by step S12, it will be estimated that a wall part is high temperature. At this time, the ECU 1B turns on the high load determination flag (step S13). In FIG. 17, the state at time T1 corresponds to the state at this time.
- the ECU 1B integrates the detected intake air amount GA to calculate an integrated intake air amount ⁇ GA (step 14). Further, the ECU 1B discharges the water pump 10 in which the flow rate correction amount corresponding to the integrated intake air amount ⁇ GA is set to the cooling water flow rate characteristic corresponding to the operating state of the engine 20 among the first and second cooling water flow rate characteristics. Add to the quantity (step S15). After step S15, this flowchart is temporarily terminated. Until the negative determination is made in step S12, the ECU 1B repeatedly executes the processes shown in steps S11 to S15.
- step S12 determines whether or not the operating state of the engine 20 is not a high rotation high load. Moreover, if it is negative determination in step S12, it will determine with a wall part not being high temperature. At this time, the ECU 1B turns off the high load determination flag (step S16). In FIG. 17, the state at time T2 corresponds to the state at this time. Subsequently, the ECU 1B subtracts the current intake air amount GA from the integrated intake air amount ⁇ GA, and updates the integrated intake air amount ⁇ GA (step S17). Further, the ECU 1B determines whether or not the calculated integrated intake air amount ⁇ GA is equal to or greater than a predetermined value (here, zero) (step S18).
- a predetermined value here, zero
- step S18 If the determination in step S18 is affirmative, the process proceeds to step S15.
- the ECU 1B repeatedly executes these processes until a negative determination is made in step S18.
- step S18 the ECU 1B resets the integrated intake air amount ⁇ GA (step S19).
- time T3 corresponds to the state at this time. In the series of operations so far, the flow rate correction amount is added by an amount corresponding to the area of the integrated intake air amount ⁇ GA shown in the figure.
- the operation state of the engine 20 has changed from a high rotation / high load operation state to a low rotation operation state.
- the rotational speed NE decreases as shown in FIG. 18, and the intake air amount GA (that is, the heat generation amount of the engine 20) decreases.
- GA that is, the heat generation amount of the engine 20
- heat is trapped in the wall portion of the water-cooled exhaust manifold 30 due to heat received from the exhaust gas at the time of high rotation and high load.
- the temperature of the wall portion of the water-cooled exhaust manifold 30 is indicated by a broken line in FIG. It will remain high for a while.
- the cooling capacity of the water-cooled exhaust manifold 30 decreases. For this reason, in this case, cooling is not in time with only the flow rate determined based on the intake air amount GA and the cooling loss Qw, and the cooling water W may overheat or boil in the water-cooled exhaust manifold 30. Specifically, as shown in FIG. 19, the cooling water W may be heated to a state where the boiling phenomenon is locally confirmed. In this case, specifically, for example, the exhaust gas cooling efficiency of the water-cooled exhaust manifold 30 at the boiling portion is reduced, or the durability or reliability of the water-cooled exhaust manifold 30 is reduced due to thermal distortion caused by the temperature difference of each part. Or, the boiling cooling water W is deteriorated.
- the ECU 1B changes the flow rate correction amount according to the integrated intake air amount ⁇ GA to the cooling water flow rate characteristic according to the operating state of the engine 20 among the first or second cooling water flow rate characteristics. It adds to the discharge amount of the set water pump 10. Thereby, the flow volume of the cooling water W which distribute
- the cooling device 100B causes the cooling water W to overheat or boil in the water-cooled exhaust manifold 30 even when the operation state of the engine 20 further shifts from a high rotation / high load operation state to a low rotation / high load operation state. Can be suitably prevented or suppressed.
- the embodiment described above is a preferred embodiment of the present invention.
- the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.
- the case where the flow variable structure 70 is provided as the flow variable means has been described.
- the present invention is not necessarily limited, and the flow rate varying means may have another appropriate configuration capable of changing the flow rate of the refrigerant.
- the flow rate varying means can be realized specifically by a variable water pump pulley 76 shown in FIG.
- This pulley 76 can be applied in place of the pulley 72.
- the idler pulley 74 is used to adjust the tension of the belt 73, and the actuator 75 is unnecessary.
- the pulley 76 includes a pair of pulley members 76a having a truncated cone shape.
- the pulley 76 has a structure capable of driving the pulley members 76a so as to be separated from and approach each other around the center in the axial direction.
- the belt 73 is hung on the pulley 76 so as to be evenly hooked on each pulley member 76a.
- the pulley 76 is of a hydraulic drive type, and is applied as a control object instead of the actuator 75, so that each pulley member 76a can be driven by switching the hydraulic pressure under the control of the ECU 1A. .
- each pulley member 76a The home position of each pulley member 76a is a position where the pulley members 76a contact each other as shown in FIG. Then, as shown in FIG. 20B, when each pulley member 76a is driven in a direction away from each other, the diameter corresponding to the belt 73 is reduced on the pulley 76. Accordingly, this can increase the rotation of the water pump 10 and increase the discharge amount. Further, by operating the pulley 76 in the reverse direction, the discharge amount of the water pump 10 can be reduced. By providing the pulley 76 as the flow rate varying means, the flow rate of the cooling water W can be changed when the cooling water W is pumped by the mechanical water pump 10.
- the first flow rate determining means determines the flow rate during steady state, and the first flow rate during transient state.
- the case where the second flow rate determining means determines the flow rate has been described.
- the present invention is not necessarily limited to this.
- the flow rate determining means is either one of the first flow rate determining means or the second flow rate determining means in both the steady state and the transient state. Also good. In this case, control can be simplified. In this case, when the steady state and the transient time are repeated in a relatively short time, the flow rate is repeatedly changed stepwise by the first flow rate determining means and the second flow rate determining means.
- the first flow rate determining means may determine the flow rate at least during steady state
- the second flow rate determining means may determine the flow rate at least during transition. Further, when either one of the first and second flow rate determining means determines the flow rate during the steady state and the transient time, the second flow rate is determined based on the amount of heat received by the exhaust system cooling unit. This flow rate determination means is preferable in that more appropriate flow rate control can be performed as a whole.
- the correction unit determines the flow rate determined by the flow rate determination unit. It can be corrected.
- the first flow rate determining unit determines the flow rate during steady state and the second flow rate determining unit determines the flow rate during transition
- the correction unit corrects the flow rate
- the first or second flow rate determining unit determines the flow rate. Any one of the flow rate determining units (for example, the second flow rate determining unit) may determine the flow rate. In this case, it is possible to improve the reliability of the flow rate varying means and stabilize the control.
- the refrigerant pressure feeding device is suitable for the mechanical water pump 10, such a case has been described.
- the present invention is not necessarily limited thereto.
- the application of the present invention can suitably prevent or suppress the refrigerant from overheating or boiling in the exhaust cooling means. .
- the exhaust system cooling means is the water-cooled exhaust manifold 30
- the present invention is not necessarily limited to this, and the exhaust system cooling means may have any other appropriate configuration capable of cooling the exhaust system of the engine with a circulating refrigerant.
- the exhaust system cooling means can be realized, for example, by an adapter that is provided between the exhaust manifold and the engine and is configured to connect them.
- Various means such as flow rate determination means, estimation means, and correction means are rationally realized mainly by the ECU 1 that controls the engine 20, but for example, hardware such as other electronic control devices or dedicated electronic circuits. Or a combination thereof.
- various means such as flow rate determination means, estimation means, and correction means are distributedly controlled by a combination of hardware such as a plurality of electronic control devices and a plurality of electronic circuits, or a combination of electronic control devices and hardware such as electronic circuits. May be realized.
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Abstract
Description
またエンジン本体を流通する冷媒は、一般にエンジンの出力で駆動する機械式のウォータポンプによって圧送されている。このためエンジン本体を流通する冷媒と共通の冷媒を用いる場合には、冷媒圧送装置として機械式のウォータポンプを用いることがコスト面などから合理的であると考えられる。
この点、エンジン本体を流通する冷媒に対しては、一般に冷却器(例えばラジエータ)による冷却が行われている。また、エンジン本体を流通する冷媒については、一般にエンジン本体の出口側の部分やエンジン本体を流通した直後の流通経路における冷媒温度が、エンジン本体における冷媒温度(以下、エンジン冷媒温度と称す)として検知されている。
このため、冷媒を適温に維持するにあたっては、例えばエンジン冷媒温度に応じてラジエータに流入する冷媒の流量を調節することが考えられる。
ここで、機械式のウォータポンプの吐出量は一般にエンジンの回転数に比例して増減する。このためエンジンの運転状態が、高回転高負荷であった場合には、排気系冷却手段における冷媒の流量も大きくなる。一方、この場合には吸入空気量が大きく、エンジンの発熱量が大きくなっていることから、排気系冷却手段が排気ガスから受熱する受熱量も増大する。このためこの場合には、排気系冷却手段のうち、排気ガスが流通する流路を形成する壁部に熱がこもり、この結果、当該壁部が高温となる。
プーリ72はウォータポンプ10の回転軸に連結されている。プーリ72は円錐台状の形状を有し、軸方向一端から他端に向かって径が次第に縮小している。
ベルト73はリング状の形態を有しており、これらプーリ71、72に掛けられている。プーリ72上におけるベルト73の定位置は一端側となっている。
プーリ74はプーリ71、72間で、ベルト73に当接するように設けられている。プーリ74はアクチュエータ75に接続されている。
アクチュエータ75は、ベルト73を加圧可能な方向に沿ってプーリ74を駆動できるように設けられている。かかるアクチュエータ75としては、例えば直動機構を組み合わせたステップモータを用いることができる。
一方、アクチュエータ75がプーリ74を駆動し、プーリ74をベルト73に押し付けた場合には、ベルト73のテンションが高まる。そしてさらに破線で示すようにベルト73がプーリ74によって押し込まれた場合には、ベルト73がプーリ72上で一端側からより径が小さい他端側にスライドする。これにより、ベルト73に対応するプーリ72の径が縮小する。このためこれにより、ウォータポンプ10の回転が高まり、吐出量が増大する。なお、ウォータポンプ10の吐出量は、アクチュエータ75を逆に動作させることで減少させることもできる。
第2の冷却水循環経路82は具体的には、ウォータポンプ10と、エンジン本体21と、サーモスタット60とが組み込まれるとともに、この順に冷却水Wが流通する循環経路となっている。またエンジン本体21を流通する際、冷却水Wは具体的にはウォータジャケット22とバイパス通路23とをこの順に流通する。
第3の冷却水循環経路83は具体的にはウォータポンプ10と、水冷式排気マニホルド30と、エンジン本体21と、サーモスタット60とが組み込まれるとともに、この順に冷却水Wが流通する循環経路となっている。またエンジン本体21を流通する際、冷却水Wは具体的には連通路24とバイパス通路23とをこの順に流通する。
第1から第3までの冷却水流通経路81から83までは、ラジエータ50を含まない循環経路となっている。
第5の冷却水循環経路85は具体的には、ウォータポンプ10と、エンジン本体21と、ラジエータ50と、サーモスタット60とが組み込まれるとともに、この順に冷却水Wが流通する循環経路となっている。またエンジン本体21を流通する際、冷却水Wは具体的にはウォータジャケット22を流通する。
第6の冷却水循環経路86は具体的には、ウォータポンプ10と、水冷式排気マニホルド30と、ラジエータ50と、サーモスタット60とが組み込まれるとともに、この順に冷却水Wが流通する循環経路となっている。
上述の複数の推定因子が吸入空気量GAを含むこととしているのは、吸入空気量GAが冷却損失Qwと高い線形的な相関関係を有しているためである。
そして上述の複数の推定因子は、冷媒温度である冷却水温THW、吸気温度THA、または回転数NEのうち、少なくともいずれか1つをさらに含むことが好ましい。これは、これら4因子が冷却損失Qwに対して大きな影響力を持つ因子であることによる。
Qw=(THW+THA)×NE×GA・・・式(1)
すなわち冷却損失Qwは、冷却水温THWと吸気温度THAとの和と、回転数NEと、吸入空気量GAとの積により算出した値に基づき推定することが最も好ましい。これは、運転状態に定常状態と過渡状態とを含むエンジン20の台上試験の結果、式(1)に基づき冷却損失Qwを推定した場合に、実際の冷却損失Qwとの間に最も高い線形的な相関関係が認められたことによる(図12参照)。このためECU1Aでは、具体的には式(1)に基づき冷却損失Qwを推定するようにしている。
同様に上述の第2の冷却水流量特性は、ROM3に予め格納されたマップデータで定義されている。そして、このマップデータでウォータポンプ10の吐出量は冷却損失Qwに比例して増減するように設定されている。そしてこれにより、同時に水冷式排気マニホルド30に流通させる冷却水Wの流量が冷却損失Qwに比例して増減するように設定されている。
第1および第2の冷却水流量特性は、例えば複数の冷却水循環経路81から86までの間で冷却水Wの流通態様が切り替わる冷間時および温間時毎に備えることができる。そしてこれにより、冷却水Wの流通態様が切り替わる場合であっても、流量可変構造70でより適切な流量制御を行うことができる。
また冷却装置100Aは流量可変構造70を備えている。このため冷却装置100Aは、機械式のウォータポンプ10で冷却水Wを圧送する場合であっても、水冷式排気マニホルド30を流通する冷却水Wの流量を変更することができる。
また流量補正手段は壁部の温度が高温でなくなった場合には、積算吸入空気量ΣGAから現在の吸入空気量GAを減算することで、積算吸入空気量ΣGAを更新する。そして流量補正手段は更新した積算吸入空気量ΣGAが所定値(例えばゼロ)以上である場合に、積算吸入空気量ΣGAに応じた流量補正量を第1または第2の冷却水流量特性のうち、エンジン20の運転状態に応じた冷却水流量特性に設定された冷却水Wの流量に加算する。
流量補正量は、具体的には図15に示すようにROM3に予め格納されたマップデータで高負荷域の積算吸入空気量ΣGAに応じ、比例して増減するように設定されている。
例えば上述した実施例では、流量可変手段として流量可変構造70を備えた場合について説明した。しかしながら本発明においては必ずしも限られず、流量可変手段は冷媒の流量を変更することが可能なその他の適宜の構成であってもよい。
プーリ76は、円錐台状の一対のプーリ部材76aを備えている。プーリ76は、軸方向中央を中心として、互いに離間、接近するように各プーリ部材76aを駆動させることが可能な構造を備えている。ベルト73は各プーリ部材76aに均等に掛かるようにしてプーリ76に掛けられている。プーリ76は油圧駆動式となっており、アクチュエータ75の代わりに制御対象として適用することで、ECU1Aの制御のもと、油圧を切り替えることで各プーリ部材76aを駆動することが可能になっている。
しかしながら、本発明においては必ずしもこれに限られず、例えば定常時および過渡時ともに流量決定手段が、第1の流量決定手段または第2の流量決定手段のうち、いずれか一方の流量決定手段であってもよい。この場合には、制御の簡素化を図ることができる。またこの場合には、定常時と過渡時が比較的短時間の間に繰り返された場合に、第1の流量決定手段と第2の流量決定手段とによって流量が段差的に繰り返し変更されることを防止でき、以って流量可変手段の信頼性の向上や、制御の安定化を図ることができる。
また、本発明においては、例えば少なくとも定常時には第1の流量決定手段が流量を決定するようにしてもよく、少なくとも過渡時には第2の流量決定手段が流量を決定するようにしてもよい。
また、第1または第2の流量決定手段のうち、いずれか一方の流量決定手段が定常時および過渡時に流量を決定する場合には、排気系冷却手段の受熱量に基づき流量を決定する第2の流量決定手段のほうが、全体としてより適切な流量制御を行える点で好適である。
また、第1の流量決定手段または第2の流量決定手段のうち、いずれか一方の流量決定手段が定常時および過渡時に流量を決定する場合、補正手段は、当該流量決定手段が決定する流量を補正するようにすることができる。
また、定常時に第1の流量決定手段が流量を決定し、過渡時に第2の流量決定手段が流量を決定する場合であっても、補正手段が流量を補正する時には、第1または第2の流量決定手段のうち、いずれか一方の流量決定手段(例えば第2の流量決定手段)が流量を決定するようにしてもよい。この場合には流量可変手段の信頼性の向上や、制御の安定化を図ることができる。
20 エンジン 30 水冷式排気マニホルド
301 排気管 40 ヒータコア
50 ラジエータ 60 サーモスタット
100 冷却装置
Claims (3)
- 複数の冷媒循環経路に共通の冷媒を圧送する冷媒圧送装置と、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路にエンジン本体が組み込まれたエンジンと、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路に組み込まれ、前記エンジン本体よりも熱容量が小さく、且つ流通する冷媒で前記エンジンの排気系を冷却する排気系冷却手段と、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路に組み込まれ、流通する冷媒を冷却する冷却器と、
前記エンジンの吸入空気量に基づき、前記排気系冷却手段に流通させる冷媒の流量を決定する流量決定手段と、を備えたエンジンの冷却装置。 - 複数の冷媒循環経路に共通の冷媒を圧送する冷媒圧送装置と、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路にエンジン本体が組み込まれたエンジンと、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路に組み込まれ、前記エンジン本体よりも熱容量が小さく、且つ流通する冷媒で前記エンジンの排気系を冷却する排気系冷却手段と、
前記複数の冷媒循環経路のうち、少なくとも1つの冷媒循環経路に組み込まれ、流通する冷媒を冷却する冷却器と、
前記排気系冷却手段で冷媒が排気から受ける受熱量に基づき、前記排気系冷却手段に流通させる冷媒の流量を決定する流量決定手段と、を備えたエンジンの冷却装置。 - 請求項1または2記載のエンジンの冷却装置であって、
前記排気系冷却手段のうち、排気ガスが流通する流路を形成する壁部の温度について推定をする推定手段と、
前記推定に基づき、前記流量決定手段が決定する冷媒の流量を補正する補正手段と、をさらに備えたエンジンの冷却装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2009801589491A CN102414413A (zh) | 2009-05-08 | 2009-05-08 | 发动机的冷却装置 |
US13/201,717 US20120047893A1 (en) | 2009-05-08 | 2009-05-08 | Engine cooling device |
JP2011512281A JP5196014B2 (ja) | 2009-05-08 | 2009-05-08 | エンジンの冷却装置 |
PCT/JP2009/058657 WO2010128549A1 (ja) | 2009-05-08 | 2009-05-08 | エンジンの冷却装置 |
Applications Claiming Priority (1)
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PCT/JP2009/058657 WO2010128549A1 (ja) | 2009-05-08 | 2009-05-08 | エンジンの冷却装置 |
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WO2010128549A1 true WO2010128549A1 (ja) | 2010-11-11 |
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PCT/JP2009/058657 WO2010128549A1 (ja) | 2009-05-08 | 2009-05-08 | エンジンの冷却装置 |
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US (1) | US20120047893A1 (ja) |
JP (1) | JP5196014B2 (ja) |
CN (1) | CN102414413A (ja) |
WO (1) | WO2010128549A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013007338A (ja) * | 2011-06-24 | 2013-01-10 | Toyota Motor Corp | 内燃機関冷却水循環装置 |
CN104159790A (zh) * | 2012-03-06 | 2014-11-19 | 雷诺股份公司 | 用于机动车辆的包括装配有散射器的部件的快速冷却装置 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR3002281A1 (fr) * | 2013-02-19 | 2014-08-22 | Peugeot Citroen Automobiles Sa | Circuit de refroidissement pilote pour moteur thermique de vehicule automobile et moteur thermique de vehicule automobile correspondant |
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JPH03179122A (ja) * | 1989-12-07 | 1991-08-05 | Fuji Heavy Ind Ltd | 触媒コンバータの温度制御装置 |
JP2008255871A (ja) * | 2007-04-04 | 2008-10-23 | Toyota Motor Corp | 冷却装置 |
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US6564757B2 (en) * | 2000-06-22 | 2003-05-20 | Toyota Jidosha Kabushiki Kaisha | Internal combustion engine including heat accumulation system, and heat carrier supply control system |
JP2002256839A (ja) * | 2001-02-28 | 2002-09-11 | Sanshin Ind Co Ltd | 小型船舶のドライサンプ潤滑構造 |
US20060086546A1 (en) * | 2002-02-08 | 2006-04-27 | Green Vision Technology, Llc | Internal combustion engines for hybrid power train |
JP4023176B2 (ja) * | 2002-02-13 | 2007-12-19 | トヨタ自動車株式会社 | 内燃機関の冷却装置 |
US7156056B2 (en) * | 2004-06-10 | 2007-01-02 | Achates Power, Llc | Two-cycle, opposed-piston internal combustion engine |
JP2006112233A (ja) * | 2004-10-12 | 2006-04-27 | Aisan Ind Co Ltd | エンジンの冷却装置 |
US20060107920A1 (en) * | 2004-11-18 | 2006-05-25 | Alexander Serkh | Auxiliary power system for a motor vehicle |
US7013646B1 (en) * | 2004-11-18 | 2006-03-21 | The Gates Corporation | Auxiliary power system for a motor vehicle |
JP2006258007A (ja) * | 2005-03-18 | 2006-09-28 | Toyota Motor Corp | 内燃機関の制御装置 |
JP2006342680A (ja) * | 2005-06-07 | 2006-12-21 | Toyota Motor Corp | 内燃機関の冷却装置 |
US7461628B2 (en) * | 2006-12-01 | 2008-12-09 | Ford Global Technologies, Llc | Multiple combustion mode engine using direct alcohol injection |
JP2008231942A (ja) * | 2007-03-16 | 2008-10-02 | Toyota Motor Corp | 内燃機関の冷却装置 |
US20080264036A1 (en) * | 2007-04-24 | 2008-10-30 | Bellovary Nicholas J | Advanced engine control |
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2009
- 2009-05-08 WO PCT/JP2009/058657 patent/WO2010128549A1/ja active Application Filing
- 2009-05-08 JP JP2011512281A patent/JP5196014B2/ja not_active Expired - Fee Related
- 2009-05-08 CN CN2009801589491A patent/CN102414413A/zh active Pending
- 2009-05-08 US US13/201,717 patent/US20120047893A1/en not_active Abandoned
Patent Citations (2)
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JPH03179122A (ja) * | 1989-12-07 | 1991-08-05 | Fuji Heavy Ind Ltd | 触媒コンバータの温度制御装置 |
JP2008255871A (ja) * | 2007-04-04 | 2008-10-23 | Toyota Motor Corp | 冷却装置 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013007338A (ja) * | 2011-06-24 | 2013-01-10 | Toyota Motor Corp | 内燃機関冷却水循環装置 |
CN104159790A (zh) * | 2012-03-06 | 2014-11-19 | 雷诺股份公司 | 用于机动车辆的包括装配有散射器的部件的快速冷却装置 |
Also Published As
Publication number | Publication date |
---|---|
JP5196014B2 (ja) | 2013-05-15 |
US20120047893A1 (en) | 2012-03-01 |
CN102414413A (zh) | 2012-04-11 |
JPWO2010128549A1 (ja) | 2012-11-01 |
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