CN1334400A - Cooling structure of IC engine - Google Patents
Cooling structure of IC engine Download PDFInfo
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- CN1334400A CN1334400A CN 01123232 CN01123232A CN1334400A CN 1334400 A CN1334400 A CN 1334400A CN 01123232 CN01123232 CN 01123232 CN 01123232 A CN01123232 A CN 01123232A CN 1334400 A CN1334400 A CN 1334400A
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- Prior art keywords
- thermostat
- temperature
- cylinder
- cooling
- cylinder head
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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
- F01P7/165—Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
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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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
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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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/021—Cooling cylinders
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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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/024—Cooling cylinder heads
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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
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
- F01P2003/028—Cooling cylinders and cylinder heads in series
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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
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/50—Temperature using two or more temperature sensors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The invention provides a cooling structure for an internal combustion engine, which can control the flow of coolant to a cylinder and a cylinder head without allowing the coolant to stay in the cylinder, according to the temperature of the coolant, and which can expect the attainment of both the effect of suppressing a drop in temperature of residual gas and an anti-knocking effect. A cooling structure for an internal combustion, comprising a first coolant circulation system and a second coolant circulation system, the first coolant circulation system having a first thermostat (5) for adjusting the amount of coolant to be circulated between a radiator (10) and the internal combustion engine, the second coolant circulation system having a second thermostat (20), the second thermostat (20) making control the coolant circulates so that the coolant circulates in parallel to a cylinder (2) and a cylinder head (3) when the temperature of the coolant is lower than a predetermined coolant temperature, while when the coolant temperature is higher than the predetermined coolant temperature, the coolant circulates in series from the cylinder (2) to the cylinder head (3).
Description
Technical field
The present invention relates to the cooling construction by the cooling liquid cooling of internal-combustion engine.
In order to carry out internal-combustion engine cooling meticulously according to the machine run state, and countercylinder and cylinder head pipe arrangement cool off the example of control independently of each other respectively, are suggested in the prior art.
Background technique
For example, in the example of TOHKEMY 2000-73770 communique record, coolant flow as shown in figure 19, supply passage 04 is in switching valve 06 place branch, be connected with cylinder head 03 with the cylinder 02 of internal-combustion engine 01 respectively, by the action of switching valve 06, cooling water can be switched ground and supply with cylinder 02 and cylinder head 03.Switching valve 06 is according to the control signal of control unit 012, by drive unit 013 action.
Identical with common internal-combustion engine, cooling water can move to cylinder head 03 from cylinder 02, and return path 05 extends from cylinder head 03.
With supply passage 04 that water pump 07 is connected on, except switching valve 06, also be provided with thermostat 08, switching travels back across the path of supply passage 04 and the bypass path 010 that directly is communicated with supply passage from return path 05 from return path 05 by radiator 09, flows through cooling liquid.
When the machine low-load, cooling water current shown in solid arrow among Figure 19 are such, control switching valve 06, blocking-up flows to the cooling liquid stream of cylinder 02, makes it be recycled to cylinder head 03, when low temperature, thermostat 08 cuts out the path by radiator 09, open bypass path 010, water pump 07 makes not the cooling liquid by radiator 09 only be circulated in cylinder head 03, and the residual gas temperature that suppresses the firing chamber reduces.
When the machine high load, switch switching valve 06, make cooling liquid flow to cylinder 02, simultaneously, thermostat 08 makes liquid circulation arrive radiator 09, by radiator 09 chilled cooling liquid, through in cylinder 02, cylinder head 03 circulation, machine is cooled off.
As mentioned above, make switching valve 06 action, carry out the cooling control of cylinder 02 and cylinder head 03 according to the load condition of machine, so, need make the control unit 012 and the drive unit 013 of switching valve 06 action, complex structure, cost height.
In addition, during the machine low-load, cooling liquid is only at cylinder head 03 circulation, the cylinder 02 of not flowing through, so, cooling liquid is trapped in the water jacket of cylinder 02, and cooling liquid only flows through cylinder head 03, like this, hindered the temperature of the residual gas of cylinder part to reduce the inhibition effect on the contrary, the delay cooling liquid of heated cylinder part when needing cool off when machine burden is high postpones the cooling of cylinder head more, might cause prominent quick-fried.
Goal of the invention
The present invention makes in view of the above problems, its purpose is to provide a kind of cooling construction of internal-combustion engine, this structure be corresponding with coolant temperature do not make cooling liquid be trapped in the cylinder control flows to the simple structure that flows of the cooling liquid of cylinder and cylinder head, the temperature that can suppress residual gas reduces, and prevents prominent quick-fried.
Technological scheme and technique effect
To achieve these goals, the cooling construction of the internal-combustion engine of claim 1 record is characterized in that, is made of the 1st coolant circulation system and the 2nd coolant circulation system; The 1st coolant circulation system has the 1st thermostat, and the 1st thermostat is used to regulate the liquid circulation amount between radiator and the internal-combustion engine; The 2nd coolant circulation system has the 2nd thermostat, the 2nd thermostat is used to control the circulation of cooling liquid, than the low low temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined coolant temperature the time, cooling liquid ground in upright arrangement is recycled to cylinder head from cylinder.
The 2nd thermostat by the 2nd coolant circulation system, when low temperature, cooling liquid is recycled to cylinder and cylinder head side by side, when high temperature, cooling liquid is recycled to cylinder head from cylinder in upright arrangemently, so, do not need to be used for the control and the drive unit of control unit, simple structureization can reduce cost.
When low temperature, make cooling liquid be recycled directly to cylinder head, simultaneously, cooling liquid also flows through cylinder, so cooling liquid is not trapped in the cylinder, compares during with delay, and the temperature that can suppress the firing chamber residual gas reduces.
In addition because cooling liquid is not trapped in the cylinder, so, when needs cool offs, can avoid because of by the warmed-up delay cooling liquid of cylinder response delay, and produce dash forward quick-fried.
The invention of claim 2 record, be in the cooling construction of the internal-combustion engine that claim 1 is put down in writing, it is characterized in that, in above-mentioned the 2nd circulatory system, when cooling liquid is recycled to cylinder and cylinder head side by side by the 2nd thermostat, the major part of cooling liquid flows directly to cylinder head, and remaining cooling liquid flows to cylinder.
During low temperature, when cooling liquid was recycled to cylinder and cylinder head side by side, major part flowed directly to cylinder head, and a spot of cooling liquid flows to cylinder, and the temperature that can suppress residual gas more effectively reduces.
The invention of claim 3 record is in the cooling construction of claim 1 or 2 internal-combustion engines of putting down in writing, and it is characterized in that the valve actuation temperature of the 2nd thermostat is than the valve actuation temperature height of the 1st thermostat.
During low temperature, cooling liquid without radiator is recycled to cylinder and cylinder head side by side, the temperature that suppresses residual gas reduces, when temperature rises, and the start of the 1st thermostat elder generation, cooling liquid is recycled to cylinder and cylinder head side by side through radiator, especially with cylinder head cooling, temperature rises and when becoming high temperature again, the 2nd thermostat start, cooling liquid ground in upright arrangement is recycled to cylinder head from cylinder, internal-combustion engine is all cooled off.
The invention of claim 4 record, be in the cooling construction of the internal-combustion engine of each record in claim 1 to 3, it is characterized in that, the 1st thermostat and the 2nd thermostat, it detects the temperature-sensitive portion of circulating cooling liquid temperature, shrinks by the exapnsion of the wax of inside to drive valve body.
The wax that temperature-sensitive portion inside has, because of the temperature exapnsion contraction of circulating cooling liquid, this variation is identical with the thermostat before of open and close valve body structure, so can utilize thermostat before, can reduce low cost.
The invention of claim 5 record is in the cooling construction of the internal-combustion engine of each record in claim 1 to 4, it is characterized in that above-mentioned the 1st thermostat is provided between the cooling liquid outlet and internal-combustion engine of radiator.
By closing the cooling liquid outlet side of radiator with the 1st thermostat, constitute without radiator and the circulating path in internal-combustion engine only; When opening the cooling liquid outlet side of radiator, the cooling liquid of process radiator circulates in internal-combustion engine.
The invention of claim 6 record is in the cooling construction of the internal-combustion engine of each record in claim 1 to 4, it is characterized in that, above-mentioned the 1st thermostat is provided between the cooling liquid inlet and internal-combustion engine of radiator.
When closing the cooling liquid inlet side of radiator, constitute without the radiator circulating path in internal-combustion engine only with the 1st thermostat; When opening the cooling liquid inlet side of radiator, the cooling liquid of having passed through radiator circulates in internal-combustion engine.
The cooling construction of the internal-combustion engine of claim 7 record is characterized in that, is made of the 1st coolant circulation system and the 2nd coolant circulation system; The 1st coolant circulation system has the 1st thermostat, and the 1st thermostat is used to regulate the liquid circulation amount between radiator and the internal-combustion engine; The 2nd coolant circulation system has the 2nd thermostat, the 2nd thermostat is used to control the circulation of cooling liquid, than the low low temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined coolant temperature the time, cooling liquid ground in upright arrangement is recycled to cylinder from cylinder head.
By the 2nd thermostat in the 2nd circulatory system, when low temperature, cooling liquid is recycled to cylinder and cylinder head side by side, when high temperature, cooling liquid ground in upright arrangement is recycled to cylinder from cylinder head, so, do not need the control unit and the drive unit that are used to control, simple structureization can reduce cost.
In addition, cooling liquid flows into cylinder head always earlier, so even stream is switched, the temperature of the cooling liquid of cooling cylinder head does not change yet, and comparable more powerful ground before cooling cylinder head.
When low temperature, make cooling liquid be recycled directly to cylinder head, in cylinder, also flow through cooling liquid simultaneously, so cooling liquid is not trapped in the cylinder, to compare during with delay, the temperature that can suppress the firing chamber residual gas reduces.
In addition, because cooling liquid is not trapped in the cylinder, so, when needing cooling, can avoid because of by the warmed-up delay cooling liquid of cylinder response delay, and produce prominent quick-fried.
During high temperature, all cooling liquid flows into cylinder from cylinder head in upright arrangemently, so, be cooled powerfully, prevent the deterioration of prominent quick-fried degree.
The invention of claim 8 record is in the cooling construction of the internal-combustion engine that claim 7 is put down in writing, and it is characterized in that the valve actuation temperature of above-mentioned the 2nd thermostat is than the valve actuation temperature height of above-mentioned the 1st thermostat.
During low temperature, be recycled to cylinder head and cylinder side by side without the cooling liquid of radiator, the temperature that suppresses residual gas reduces.When temperature rises, the start of the 1st thermostat elder generation, cooling liquid is recycled to cylinder head and cylinder side by side through radiator, and cylinder head is cooled off.When temperature rises and when becoming high temperature, the 2nd thermostat start is recycled to cylinder with cooling liquid ground in upright arrangement from cylinder head again, internal-combustion engine is all cooled off.
The invention of claim 9 record is in the cooling construction of claim 7 or 8 internal-combustion engines of putting down in writing, and it is characterized in that above-mentioned the 1st thermostat is provided between the cooling liquid outlet and internal-combustion engine of radiator.
When closing the cooling liquid outlet side of radiator with the 1st thermostat, constitute without the radiator circulating path in internal-combustion engine only, when opening the cooling liquid outlet side of radiator, the cooling liquid of having passed through radiator circulates in internal-combustion engine.
The invention of claim 10 record is in the cooling construction of the internal-combustion engine that claim 9 is put down in writing, and it is characterized in that, has branch, and this branch supplies with cylinder head with the cooling liquid flow branching with most of cooling liquid, and remaining cooling liquid is supplied with cylinder; Above-mentioned the 2nd thermostat is provided between the cooling liquid inlet and internal-combustion engine of radiator, than the low low temperature of predetermined temperature the time, open the valve of cylinder head side, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined temperature the time, close the valve of cylinder head side, open the valve of cylinder side, cooling liquid ground in upright arrangement is recycled to cylinder from cylinder head.
During more than above-mentioned the 1st thermostat is opened the temperature of cooling liquid outlet side of radiator and than the low low temperature of predetermined temperature, above-mentioned the 2nd thermostat is opened the valve of cylinder head side, cooling liquid is recycled to cylinder and cylinder head side by side, make cooling liquid be recycled directly to cylinder head, also flow through cooling liquid in the cylinder simultaneously, so cooling liquid is not trapped in the cylinder, compare during with delay, the temperature that can suppress the firing chamber residual gas reduces.
When than the high high temperature of predetermined temperature, make whole cooling liquids ground in upright arrangement flow to cylinder from cylinder head, cooled off powerfully, prevent the deterioration of prominent quick-fried degree.
The simple declaration of accompanying drawing
Fig. 1 is the sectional view of the cooling water temperature state when being low temperature in the cooling construction of expression internal-combustion engine.
Fig. 2 is the sectional view along II-II line among Fig. 1.
Fig. 3 is the block diagram of this cooling water flow of expression.
Fig. 4 is the sectional view of the state when being middle temperature of the cooling water temperature in the cooling construction of expression internal-combustion engine.
Fig. 5 is the sectional view along V-V line among Fig. 4.
Fig. 6 is the block diagram of this cooling water flow of expression.
Fig. 7 is the sectional view of the cooling water temperature state when being high temperature in the cooling construction of expression internal-combustion engine.
Fig. 8 is the sectional view along VIII-VIII line among Fig. 1.
Fig. 9 is the block diagram of this cooling water flow of expression.
Figure 10 is block diagram state, cooling water flow when representing that cooling water temperature in another embodiment's the cooling construction of internal-combustion engine is low temperature.
Figure 11 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being middle temperature.
Figure 12 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being high temperature.
Figure 13 is block diagram state, cooling water flow when representing that cooling water temperature in another embodiment's the cooling construction of internal-combustion engine is low temperature.
Figure 14 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being middle temperature.
Figure 15 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being high temperature.
Figure 16 is block diagram state, cooling water flow when representing that cooling water temperature in another embodiment's the cooling construction of internal-combustion engine is low temperature.
Figure 17 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being middle temperature.
Figure 18 is the cooling water temperature of expression in this internal-combustion engine cooling construction block diagram state, cooling water flow when being high temperature.
Figure 19 is a block diagram of representing cooling liquid stream before.
Embodiment
Below, referring to figs. 1 through Fig. 9, one embodiment of the invention are described.
State when Fig. 1 to Fig. 3 represents low temperature in the cooling construction of present embodiment internal-combustion engine 1.The state in when temperature during Fig. 4 to Fig. 6 represents, the state when Fig. 7 to Fig. 9 represents high temperature.
The explanation cooling construction sees figures.1.and.2 earlier.
The cylinder block 2 of internal-combustion engine 1 and cylinder head 3 are expressed as the separation shape in the drawings, are engaging but be actually by seal washer.Water jacket 2a around the cylinder thorax of cylinder block 2 is communicated with the firing chamber water jacket on every side of cylinder head 3 by the seal washer hole.
On cylinder head 3, as shown in Figure 2, be provided with water pump 4 and the 1st thermostat 5 with adjoining each other.
The 1st thermostat 5, valve body 5a cylindraceous with temperature-sensitive portion of built-in wax, slide at axle direction by temperature variation, control inlet aperture 5b (this inlet aperture 5b is communicated with the coolant outlet 10b of radiator 10 by pipe 11) and export break-make between the 5d of aperture, simultaneously, the break-make between control inlet aperture 5c (this inlet aperture 5c is communicated with the jacket water outlet 3a of cylinder head 3 by bypass tube 7 and connecting tube 6) and outlet aperture 5d.
The 1st thermostat 5, its temperature-sensitive portion induction cooling water temperature, below 80 ℃ the time, valve body 5a closes the inlet aperture 5b that is communicated with radiator 10 as illustrated in fig. 2, opens the inlet aperture 5c that is communicated with the opposing party's bypass tube 7, and exports aperture 5d and is communicated with.
When surpassing 80 ℃, valve body 5a closes the inlet aperture 5c that is communicated with bypass tube 7 shown in Fig. 5 (Fig. 8), opens the inlet aperture 5b that is communicated with radiator 10, and aperture 5d is communicated with outlet.
Above-mentioned the 1st thermostat 5, the wax that temperature-sensitive portion inside is had are by the temperature of recirculated cooling water and exapnsion shrinks, and it changes driven for opening and closing valve body, and this structure is known, utilizes known thermostat, can reduce cost.
The coolant outlet 3a of the water jacket of cylinder head 3, its forehearth limb, a side is connected with above-mentioned bypass tube 7, and the opposing party is connected (see figure 1) by pipe 12 with the cooling water inlet 10a of radiator 10.
As shown in Figure 2, the above-mentioned outlet 5d of the 1st thermostat 5 is communicated with the Pump Suction Nozzle 4a of the cooling water of water pump 4.
The pump discharge 4b of water pump 4 is communicated with (see figure 1) by pipe 13 with the inlet aperture 20a of the 2nd thermostat 20.
The 2nd thermostat 20, its cylindrical body 21 (this cylindrical body 21 has the 21a of temperature-sensitive portion that wax in the big central filling in footpath) is bearing in slidably and keeps on the seat 24,25, the temperature-sensitive portion 21a ground that the 1st discoideus valve body 22 and the 2nd valve body 23 are being held cylindrical body 21 under the arm is entrenched in both sides integratedly, can utilize known thermostat.
The discoideus valve seat of hollow that the 1st valve body is 22 that join, keep seat 24 in the housing of the 2nd thermostat 20, is separated base side and outlet aperture 20b side, and the 2nd valve body 23 opens and closes the opening of another outlet aperture 20c.
The 2nd thermostat 20, the 21a of its temperature-sensitive portion responds to cooling water temperature, and below 100 ℃ the time, as shown in Figure 1, the 1st valve body 22 is closed outlet aperture 20b, and the 2nd valve body 23 is opened outlet aperture 20c simultaneously, and aperture 20a is communicated with inlet.
When surpassing 100 ℃, as shown in Figure 7, the 2nd valve body 23 is closed outlet aperture 20c, and the 1st valve body 22 is opened outlet aperture 20b, and aperture 20a is communicated with inlet.
The 2nd thermostat 20, the peripheral portion of the valve seat of the maintenance seat of in housing base side and outlet aperture 20b side being separated 24, double as are that the through hole 27 of exhaust port is communicated with the inlet aperture 20a side in the housing always with outlet aperture 20b side.
Above-mentioned cooling construction is arranged on this internal-combustion engine 1, below, referring to figs. 1 through Fig. 9, the situation that the cooling water stream changes because of cooling water temperature is described.
At first, when cooling water temperature is a low temperature operating condition below 80 ℃, as shown in Figure 1 to Figure 3, the 1st thermostat 5, its valve body 5a closes the inlet aperture 5b that is communicated with radiator 10, open the inlet aperture 5c that is communicated with bypass tube 7, aperture 5d is communicated with outlet, also stream cooling water from cylinder head 3, not circulation in radiator 10, but entering the inlet aperture 5c of the 1st thermostat 5 by bypass tube 7, aperture 5d is sucked by water pump 4 from outlet, is discharged to the 2nd thermostat 20 from pump discharge 4b by managing 13.
The 2nd thermostat 20, its the 1st valve body 22 is closed outlet aperture 20b, the 2nd valve body 23 is opened outlet aperture 20c simultaneously, aperture 20a is communicated with inlet, therefore, from the cooling water that water pump 4 is discharged, enter the inlet aperture 20a of the 2nd thermostat 20, from outlet aperture 20c by managing 15 water jackets that flow directly into cylinder head 3.
The part of cooling water of inlet aperture 20a that has entered the 2nd thermostat 20 is by keeping the through hole 27 of seat 24, flows into the water jacket 2a of cylinder blocks 2 from outlet aperture 20b by pipe 14, is recycled to the water jacket of cylinder head 3.
As mentioned above, be in the operating condition below 80 ℃ during cooling water flow, as shown in Figure 3 with the block representation cooling water temperature.
Promptly, cooling water from water pump 4 discharges, flow to cylinder head 3 and cylinder block 2 abreast from the 2nd thermostat 20, especially, the major part of cooling water flows directly to cylinder head 3 (the heavy line arrow of Fig. 1, Fig. 3), and remaining cooling water flow flows to cylinder head 3 (the fine line arrow among Fig. 1, Fig. 3) to cylinder block 2 and through cylinder block 2.The cooling water of gathering cylinder head 3 does not pass through bypass 7 by radiator 10 from cylinder head 3, is recycled to water pump 4 through the 1st thermostat 5, and the residual gas temperature that can suppress the firing chamber reduces.
During low temperature, make cooling liquid be recycled directly to cylinder head 3, simultaneously, a spot of cooling water also flows to cylinder block, so cooling water can not be trapped in the cylinder block 2, the temperature that can more effectively suppress the firing chamber residual gas reduces.
When cooling water temperature surpasses 80 ℃ and below 100 ℃ the time, extremely shown in Figure 6 as Fig. 4, the valve body 5a action of the 1st thermostat 5, close the inlet aperture 5c that is communicated with bypass 7, open the inlet aperture 5b that is communicated with radiator 10, from the also stream cooling water flow of cylinder head 3 to radiator 10 (see figure 5)s.
The 2nd thermostat 20, during with above-mentioned 80 ℃ similarly, the 1st valve body 22 is closed outlet aperture 20b, the 2nd valve body 23 is opened outlet aperture 20c, aperture 20a is communicated with inlet, the major part of cooling water flows directly to cylinder head 3 (the heavy line arrow among Fig. 4, Fig. 6), and remaining cooling water flow is to cylinder block 2 (the fine line arrow among Fig. 4, Fig. 6).
Therefore, circulation and be absorbed heat and become the major part of the cooling water of low temperature in the radiator 10 flows directly to cylinder head 3, and the firing chamber is cooled off.
Therefore, when cooling cylinder head 3, the high cooling water of temperature that can avoid being trapped in cylinder block 2 as before flows into cylinder head 3, hinders the cooling of cylinder head 3 and causes prominent quick-fried etc.
When cooling water temperature surpassed 100 ℃, to shown in Figure 9, the valve body 5a of the 1st thermostat 5 closed inlet aperture 5c, opens the inlet aperture 5b (see figure 8) that is communicated with radiator 10 as Fig. 7, from the also stream cooling water flow of cylinder head 3 to radiator 10.
20 actions of the 2nd thermostat, as shown in Figure 7, the 1st valve body 22 is opened outlet aperture 20b, and the 2nd valve body 23 is closed outlet aperture 20c.
Therefore, as shown in Figure 9, form that the cooling water of discharging from water pump 4 flows through the 2nd thermostat 20, cylinder block 2, cylinder head 3, radiator the 10, the 1st thermostat 5 successively and the circulation road of returning water pump 4.
Flow through the cooling water of radiator 10, in turn flow to cylinder block 2, cylinder head 3 from the 2nd thermostat 20, a large amount of cooling waters also flows to cylinder block 2, internal-combustion engine all can be cooled off.
As mentioned above, with 2 thermostats, 5,20 control cooling-water flow, especially use the cooling-water flow of the 2nd thermostat control flows to cylinder block 2 and cylinder head 3, do not need control unit and drive unit, simple structureization can reduce cost.
In the foregoing description, the 1st thermostat 5 is being connected with internal-combustion engine 1 by managing the 11 coolant outlet 10b that are located at radiator 10.But, also can be located at the cooling water inlet side of radiator, Figure 10 to Figure 12 represents the block diagram of the state of temperature different with embodiment's cooling construction.
Critical piece beyond the 1st thermostat 30, same as the previously described embodiments, so, annotate with same tag.
The 1st thermostat 30, its outlet aperture is connected with the cooling water inlet of radiator 10, and another outlet aperture is connected with the Pump Suction Nozzle of water pump 4, and the inlet aperture is connected with the coolant outlet of the water jacket of cylinder head 3.
In cooling water temperature is low temperature operating condition below 80 ℃, as shown in figure 10, close the outlet aperture that is communicated with radiator 10, open the outlet aperture that is connected with the Pump Suction Nozzle of water pump 4.
From cylinder head 3 also flow the inlet aperture that cooling water enters the 1st thermostat 30, be not recycled to radiator 10 ground from the outlet aperture and sucked by water pump 4, be discharged to the 2nd thermostat 20 from pump discharge 4b.
The 2nd thermostat 20, its the 1st valve body 22 is closed outlet aperture 20b, the 2nd valve body 23 is opened outlet aperture 20c simultaneously, aperture 20a is communicated with inlet, therefore, enter the inlet aperture 20a of the 2nd thermostat 20 from the cooling water of water pump 4 discharges, from outlet aperture 20c by managing 15 water jackets (the heavy line arrow Figure 10) that flow directly into cylinder head 3, simultaneously, entered the part of the cooling water of inlet aperture 20a, by the through hole 27 of maintenance seat 24 and from the water jacket 2a (fine line arrow Figure 10) of outlet aperture 20b, in the water jacket of cylinder head 3, circulate by pipe 14 inflow cylinder blocks 2.
Therefore, gather the cooling water of cylinder head 3, through the 1st thermostat 5, be not recycled to water pump 4 by radiator 10 ground, the residual gas temperature that can suppress the firing chamber reduces.
During low temperature, make cooling liquid be recycled directly to cylinder head 3, a spot of cooling water also flows to cylinder block 2, so cooling water is not trapped in cylinder block 2, the temperature that can suppress the firing chamber residual gas more effectively reduces.
When cooling water temperature surpasses 80 ℃ and below 100 ℃ the time, as shown in figure 11, the 1st thermostat 5 cuts out the inlet aperture that is communicated with water pump 4, opens the outlet aperture 5b that is communicated with radiator 10, from the also stream cooling water flow of cylinder head 3 to radiator 10.
Therefore, circulation and be absorbed heat and the major part that becomes the cooling water of low temperature flows directly to cylinder head 3 (the heavy line arrow among Figure 11) in the radiator 10 is cooled off the firing chamber energetically.
When cooling water temperature surpasses 100 ℃, as shown in figure 12, the 2nd thermostat 20, its the 1st valve body 22 is opened outlet aperture 20b, and the 2nd valve body 23 is closed outlet aperture 20c, as shown in figure 12, flow through the cooling water of radiator 10, ground in upright arrangement in turn flows to cylinder block 2, cylinder head 3 from the 2nd thermostat 20, and a large amount of cooling waters also flows to cylinder block 2, with internal-combustion engine 1 whole cooling.
Below, the cooling construction of another embodiment's internal-combustion engine is described.
Figure 13 to Figure 15 is the block diagram of 3 state of temperatures of this cooling construction.
Present embodiment and above-mentioned Fig. 1 are that the 2nd thermostat and configuration thereof are different, and are provided with joint at the position of the 2nd thermostat 20 to difference embodiment illustrated in fig. 9.Other structure is identical.
The mark of other critical piece, same as the previously described embodiments.
Therefore, the 1st thermostat 5 is located at the coolant outlet of radiator 10, with 80 ℃ be boundary, the inflow of the cooling water of changeable cylinder head 3 sides and radiator 10 sides.
Joint 41, the cooling water of discharging from water pump 4, most of cylinder head 3 of supplying with, a part is supplied with cylinder block 2 by aperture.
The 2nd thermostat 40, its outlet aperture is communicated with the cooling water inlet of radiator 10, and the side in two apertures that enter the mouth is communicated with the water jacket of cylinder head 3, and the opposing party is communicated with the water jacket of cylinder block 2.
With 100 ℃ be boundary, the connection in 2 inlet apertures is by disconnected, logical.
Promptly, at cooling water temperature is low temperature when running below 80 ℃, and as shown in figure 13, the 2nd thermostat 40 becomes the inlet aperture of opening cylinder head 3 sides, the state of cutting out the inlet aperture of cylinder block 2 sides, the 1st thermostat 5 is opened the inlet aperture of cylinder head 3 sides, closes radiator 10 sides.
Owing to close radiator 10 sides of the 1st thermostat 5, so, not through the cooling-water flow of the 2nd thermostat 40 to radiator 10, from the also stream cooling water of cylinder head 3, not circulation in radiator 10, but enter the inlet aperture 5c of the 1st thermostat 5 by bypass 7, aperture 5d is sucked by water pump 4 from outlet, and by joint 41, major part flows into cylinder head 3 (heavy line arrow among Figure 13) from pump discharge 4b, a part flows to cylinder block 2 (fine line arrow among Figure 13), flows side by side.
Therefore, the temperature that can suppress the firing chamber residual gas reduces, in addition, when low temperature, make cooling liquid be recycled directly to cylinder head 3, simultaneously, also flow through a spot of cooling water in the cylinder block 2, so cooling water is not trapped in cylinder block 2, the temperature that can more effectively suppress the firing chamber residual gas reduces.
When cooling water temperature surpasses 80 ℃ and below 100 ℃ the time, as shown in figure 14, the 1st thermostat 5 cuts out the inlet aperture of cylinder head 3 sides, open radiator 10 sides, so, the cooling water of gathering cylinder head 3, flow into from the inlet aperture of opening of the 2nd thermostat 40, flow to radiator 10 from the outlet aperture, back inflow the 1st thermostat 5 is cooled, flow to cylinder head 3 (heavy line arrow Figure 14) from water pump 4 by joint 41, a part flows to cylinder block 2 (fine line arrow among Figure 14), flows side by side.
Therefore, the firing chamber is cooled off in circulation and be absorbed heat and the major part that becomes the cooling water of low temperature flows directly to cylinder head 3 (the heavy line arrow among Figure 14) in the radiator 10.
Therefore, when cooling cylinder head 3, the high cooling water of temperature that can avoid being trapped in cylinder block 2 as before flows into cylinder head 3, hinders the cooling of cylinder head 3 and causes prominent quick-fried etc.
When cooling water temperature surpasses 100 ℃, as shown in figure 15, the 2nd thermostat 40 cuts out the inlet aperture of cylinder head 3 sides, opens the inlet aperture of cylinder block 2 sides, so, flow through the cooling water of radiator 10, major part flows to cylinder head 3 from joint 41, flows to cylinder block 2 then, a part flows directly to cylinder block 2 by aperture, two strands of current are gathered at the water jacket of cylinder block 2, flow to the 2nd thermostat 40, are recycled to radiator 10.
With the side by side a large amount of cooling water flow of cylinder head 3 to cylinder block 2, internal-combustion engine 1 is all cooled off, prevent the deterioration of prominent quick-fried degree.
Because cooling water flows into cylinder head 3 always earlier, so even stream is switched, temperature-resistantization of the liquid of cooling cylinder head 3 can be than more powerful ground cooling cylinder head 3 before.
As mentioned above,, especially control the cooling-water flow of cylinder blocks 2 and cylinder head 3 with the 2nd thermostat 40 with 2 thermostats 5,40 control cooling-water flow, so, not needing the control and the drive unit of control unit, simple structureization can reduce cost.
Below, the cooling construction of another embodiment's internal-combustion engine is described.
Figure 16 to Figure 18 is the block diagram of 3 state of temperatures of this cooling construction.
Present embodiment and above-mentioned Figure 13 are to embodiment illustrated in fig. 15 basic identical, and its difference is that the 1st thermostat 50 is located at the place, cooling water inlet of radiator.
The mark of other critical piece, same as the previously described embodiments.
Be located at the 1st thermostat 50 of the cooling water inlet of radiator, with the place, inlet aperture that cylinder head 3 is connected with the 2nd thermostat 40 valve is being arranged respectively, with the place, outlet aperture that radiator is connected with water pump 4 valve is being arranged respectively, each valve is that the boundary opens and closes with 80 ℃ of cooling water temperatures.
The 2nd thermostat 40 has valve at the place, inlet aperture that is connected with each water jacket of cylinder head 3 and cylinder block 2 respectively, is that the boundary opens and closes with 100 ℃.
In cooling water temperature is low temperature operating condition below 80 ℃, as shown in figure 16, the 2nd thermostat 40, become the inlet aperture of opening cylinder head 3 sides, the state of closing the inlet aperture of cylinder block 2 sides, the 1st thermostat 50 is opened the inlet aperture of cylinder head 3 sides, close the inlet aperture of the 2nd thermostat 40 sides, close the outlet aperture of radiator 10 sides, open the outlet aperture of water pump 4 sides.
Also stream cooling water from cylinder head 3 is not sucked by water pump 4 in radiator 10 circularly through the 1st thermostat 50, flow to cylinder head 3 (the heavy line arrow Figure 16) from pump discharge 4b by joint 41, a part flows to cylinder block 2 (the fine line arrow among Figure 16), flows side by side.
Therefore, the temperature that can suppress the firing chamber residual gas reduces, and in addition, cooling water is not trapped in cylinder block 2, and the temperature that suppresses the firing chamber residual gas more effectively reduces.
When cooling water temperature above 80 ℃, and below 100 ℃, as shown in figure 17, the 1st thermostat 50 cuts out the inlet aperture and the water pump 4 side outlet apertures of cylinder head 3 sides, open the 2nd thermostat aperture, 40 side entrance and radiator 10 side outlet apertures, so, the cooling water of gathering cylinder head 3, flow into from the inlet aperture of opening of the 2nd thermostat 40, flow to radiator 10 from the outlet aperture through the 1st thermostat 50, the cooling back is sucked by water pump 4, flow to cylinder head 3 (heavy line arrow among Figure 17) by joint 41 major parts, a part flows to cylinder block 2 (fine line arrow among Figure 17), flows side by side.
Therefore, the firing chamber is cooled off in circulation and be absorbed heat and the major part that becomes the cooling water of low temperature flows directly to cylinder head 3 (the heavy line arrow among Figure 17) in the radiator 10.
Therefore, when cooling cylinder head 3, the high cooling water of temperature that can avoid being trapped in cylinder block 2 as before flows into cylinder head 3, hinders the cooling of cylinder head 3 and causes prominent quick-fried etc.
When cooling water temperature surpassed 100 ℃, as shown in figure 18, the 2nd thermostat 40 cut out the inlet aperture of cylinder head 3 sides, open the inlet aperture of cylinder block 2 sides, so, flow through the cooling water of radiator 10, major part flows to cylinder head 3 from joint 41, flows to cylinder block 2 then.A part flows directly to 2, two strands of current of cylinder block from aperture and flow to the 2nd thermostat 40 after the water jacket set of cylinder block 2, is recycled to radiator 10 through the 1st thermostat 50 again.
With cylinder head 3 side by side, a large amount of cooling water flow is to cylinder block 2, and internal-combustion engine 1 is all cooled off, and prevents prominent quick-fried deterioration.
Because cooling water flows into cylinder head 3 always earlier, so even stream is switched, the temperature of the liquid of cooling cylinder head 3 does not change yet, can be than more powerful ground cooling cylinder head before.
As mentioned above, with 2 thermostats, 40,50 control cooling-water flow, do not need control unit and drive unit, simple structureization can reduce cost.
Claims (10)
1. the cooling construction of internal-combustion engine is characterized in that, is made of the 1st coolant circulation system and the 2nd coolant circulation system; The 1st coolant circulation system has the 1st thermostat, and the 1st thermostat is used to regulate the liquid circulation amount between radiator and the internal-combustion engine; The 2nd coolant circulation system has the 2nd thermostat, the 2nd thermostat is used to control the circulation of cooling liquid, than the low low temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder head from cylinder in upright arrangemently.
2. the cooling construction of internal-combustion engine as claimed in claim 1, it is characterized in that, in above-mentioned the 2nd circulatory system, when cooling liquid is recycled to cylinder and cylinder head side by side by the 2nd thermostat, the major part of cooling liquid flows directly to cylinder head, and remaining cooling liquid flows to cylinder.
3. the cooling construction of internal-combustion engine as claimed in claim 1 or 2 is characterized in that, the valve actuation temperature of the 2nd thermostat is than the valve actuation temperature height of the 1st thermostat.
4. as the cooling construction of each described internal-combustion engine in the claim 1 to 3, it is characterized in that, the 1st thermostat and the 2nd thermostat, its temperature-sensitive portion of detecting the circulating cooling liquid temperature shrinks by the exapnsion of the wax of inside and drives valve body.
5. as the cooling construction of each described internal-combustion engine in the claim 1 to 4, it is characterized in that above-mentioned the 1st thermostat is provided between the cooling liquid outlet and internal-combustion engine of radiator.
6. as the cooling construction of each described internal-combustion engine in the claim 1 to 4, it is characterized in that above-mentioned the 1st thermostat is provided between the cooling liquid inlet and internal-combustion engine of radiator.
7. the cooling construction of internal-combustion engine is characterized in that, is made of the 1st coolant circulation system and the 2nd coolant circulation system; The 1st coolant circulation system has the 1st thermostat, and the 1st thermostat is used to regulate the liquid circulation amount between radiator and the internal-combustion engine; The 2nd coolant circulation system has the 2nd thermostat, the 2nd thermostat is used to control the circulation of cooling liquid, than the low low temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined coolant temperature the time, cooling liquid is recycled to cylinder from cylinder head in upright arrangemently.
8. the cooling construction of internal-combustion engine as claimed in claim 7 is characterized in that, the valve actuation temperature of the 2nd thermostat is than the valve actuation temperature height of the 1st thermostat.
9. as the cooling construction of claim 7 or 8 described internal-combustion engines, it is characterized in that above-mentioned the 1st thermostat is provided between the cooling liquid outlet and internal-combustion engine of radiator.
10. the cooling construction of internal-combustion engine as claimed in claim 9 is characterized in that, has branch, and this branch supplies with cylinder head with the cooling liquid flow branching with most of cooling liquid, and remaining cooling liquid is supplied with cylinder; Above-mentioned the 2nd thermostat is provided between the cooling liquid inlet and internal-combustion engine of above-mentioned radiator, than the low low temperature of predetermined temperature the time, open the valve of cylinder head side, cooling liquid is recycled to cylinder and cylinder head side by side, than the high high temperature of predetermined temperature the time, close the valve of cylinder head side, open the valve of cylinder side, cooling liquid is recycled to cylinder from cylinder head in upright arrangemently.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000218008 | 2000-07-18 | ||
| JP218008/2000 | 2000-07-18 | ||
| JP2001187149A JP4522018B2 (en) | 2000-07-18 | 2001-06-20 | Internal combustion engine cooling structure |
| JP187149/2001 | 2001-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1334400A true CN1334400A (en) | 2002-02-06 |
| CN1145743C CN1145743C (en) | 2004-04-14 |
Family
ID=26596257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011232323A Expired - Fee Related CN1145743C (en) | 2000-07-18 | 2001-07-18 | Cooling structure of IC engine |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1174602B1 (en) |
| JP (1) | JP4522018B2 (en) |
| CN (1) | CN1145743C (en) |
| DE (1) | DE60116001T2 (en) |
| ES (1) | ES2254294T3 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796738B (en) * | 2004-12-27 | 2011-09-07 | 本田技研工业株式会社 | Cooling water supply apparatus |
| CN103180565A (en) * | 2010-11-01 | 2013-06-26 | 丰田自动车株式会社 | Cooling system for internal combustion engine |
| CN106894905A (en) * | 2015-12-17 | 2017-06-27 | 上海汽车集团股份有限公司 | Hybrid vehicle and its cooling system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2452920A (en) * | 2007-09-18 | 2009-03-25 | Lotus Car | Multi-cylinder Internal Combustion Engine with Cabin and De-activated Cylinder Heating using Coolant Flow |
| JP5565283B2 (en) * | 2010-11-17 | 2014-08-06 | トヨタ自動車株式会社 | Cooling device for internal combustion engine |
| JP5724596B2 (en) * | 2011-05-06 | 2015-05-27 | トヨタ自動車株式会社 | Engine cooling system |
| GB2540401B (en) * | 2015-07-16 | 2019-01-23 | Chongqing Changan Automobile Co Ltd | A cooling assembly |
| JP7296287B2 (en) * | 2019-09-25 | 2023-06-22 | ダイハツ工業株式会社 | automotive internal combustion engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB646201A (en) * | 1947-05-02 | 1950-11-15 | Thornycroft John I & Co Ltd | Improvements in or relating to cooling systems for internal combustion engines |
| JPS61250330A (en) * | 1985-04-26 | 1986-11-07 | Mitsubishi Motors Corp | Cooling device for engine |
| JPS6316122A (en) * | 1986-07-07 | 1988-01-23 | Aisin Seiki Co Ltd | Cooling device for internal combustion engine |
| GB2234343A (en) * | 1989-07-22 | 1991-01-30 | Ford Motor Co | Engine cooling system |
-
2001
- 2001-06-20 JP JP2001187149A patent/JP4522018B2/en not_active Expired - Fee Related
- 2001-07-16 EP EP20010117221 patent/EP1174602B1/en not_active Expired - Lifetime
- 2001-07-16 DE DE2001616001 patent/DE60116001T2/en not_active Expired - Lifetime
- 2001-07-16 ES ES01117221T patent/ES2254294T3/en not_active Expired - Lifetime
- 2001-07-18 CN CNB011232323A patent/CN1145743C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1796738B (en) * | 2004-12-27 | 2011-09-07 | 本田技研工业株式会社 | Cooling water supply apparatus |
| CN103180565A (en) * | 2010-11-01 | 2013-06-26 | 丰田自动车株式会社 | Cooling system for internal combustion engine |
| CN106894905A (en) * | 2015-12-17 | 2017-06-27 | 上海汽车集团股份有限公司 | Hybrid vehicle and its cooling system |
| CN106894905B (en) * | 2015-12-17 | 2019-04-09 | 上海汽车集团股份有限公司 | Hybrid vehicle and its cooling system |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2254294T3 (en) | 2006-06-16 |
| JP2002097959A (en) | 2002-04-05 |
| EP1174602A3 (en) | 2003-10-01 |
| DE60116001D1 (en) | 2006-01-26 |
| JP4522018B2 (en) | 2010-08-11 |
| CN1145743C (en) | 2004-04-14 |
| DE60116001T2 (en) | 2006-06-22 |
| EP1174602A2 (en) | 2002-01-23 |
| EP1174602B1 (en) | 2005-12-21 |
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