CN101368504B - Cooling system of engine - Google Patents
Cooling system of engine Download PDFInfo
- Publication number
- CN101368504B CN101368504B CN2008100217766A CN200810021776A CN101368504B CN 101368504 B CN101368504 B CN 101368504B CN 2008100217766 A CN2008100217766 A CN 2008100217766A CN 200810021776 A CN200810021776 A CN 200810021776A CN 101368504 B CN101368504 B CN 101368504B
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- Prior art keywords
- water
- thermoregulator
- water jacket
- engine
- cylinder body
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 176
- 230000002457 bidirectional effect Effects 0.000 claims description 18
- 239000010721 machine oil Substances 0.000 claims description 16
- 239000012188 paraffin wax Substances 0.000 claims description 15
- 239000001993 wax Substances 0.000 claims description 8
- 210000000476 body water Anatomy 0.000 description 19
- 239000000110 cooling liquid Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 239000000446 fuel Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Abstract
The invention relates to an engine cooling system, comprising a water pump, a first thermoregulator, a second thermoregulator, a water jacket arranged inside a cylinder body and a water jacket arranged in a cylinder cover. The water pump has two water outlets which are respectively connected to the water jacket inside the cylinder body and the water jacket inside the cylinder cover. The first thermoregulator is positioned at the water inlet of the water jacket inside the cylinder cover and the second thermoregulator is positioned at the water outlet of the water jacket inside the cylinder body, connecting the water jacket inside the cylinder cover and the water jacket inside the cylinder cover to a water return pump respectively through a water return pipe of the water pump. The engine cooling system enables the cylinder cover and the cylinder body to work within different temperature ranges through simple control and enables the component parts of the engine to work at the optimal temperature.
Description
Technical field
The present invention relates to a kind of engine-cooling system.
Background technique
Existing engine-cooling system, normally cooling liquid enters by water pump that cylinder block enters cylinder head by the water hole on the cylinder head gasket again or cooling liquid enters cylinder body and cylinder cap water jacket respectively by water pump, but cooling liquid all flows out motor simultaneously and is cooled off by radiator, only require that generally engine operation is not overheated, such structure is when the motor proper functioning, engine block temperature is all than center housing temperature height, and the ideal engine hot working to be the cylinder head temperature lower and block temperature is higher relatively.The cylinder head temperature is low can to improve charging efficiency, increases air inflow.Low and the air inflow of temperature can promote perfect combustion greatly, reduces the formation of NOx, also improves output power.Higher block temperature can reduce frictional loss, directly improves fuel efficiency and improves output power, surge pressure and temperature in the indirect reduction cylinder.
Thereby guarantee that it is very important that motor always works in the best temperature range, if center housing temperature is low excessively or the cylinder cap temperature is too high, not only influences the inefficiency of motor, and badly influences the exhaust emission of motor, and cause energy waste.
Summary of the invention
The center housing temperature, the cylinder cap temperature that the objective of the invention is at above-mentioned available engine are identical, or the too high shortcoming of cylinder cap temperature, develop a kind of new engine-cooling system, it is a kind of flow deviding type cooling system, in this cooling system, cylinder block, cylinder head flow back to the road cooling by liquid separately, and cylinder head has different temperature with cylinder block, can make the temperature set-point work of motor each several part at optimum.It is maximum that the whole efficiency of cooling system reaches.Each cooling circuit will be worked under different chilling temperature set points or flow velocity, create the ideal engine temperature distribution.When improving effective engine power, also reduce the pollution from exhaust emission that motor causes environment greatly, and fuel saving effectively.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of engine-cooling system provided by the invention, mainly comprise water pump, bidirectional temp regulation device and individual event thermoregulator, a machine oil cooler (there is a thermoregulator inside), be located at water jacket in the cylinder body, be located at water jacket, radiator of water tank, warm-air drier and cooler for recycled exhaust gas in the cylinder cap, the engine body water jacket by mutually independently cylinder body water jacket and cylinder cap water jacket two-part form, be not provided with the water hole of cylinder head water cover water intake on the gland shim that cylinder body water jacket and cylinder cap water jacket are separated; The cylinder cap water intake has a thermolator base device, in be provided with the bidirectional temp regulation device of exquisite paraffin, when cooling water is normal temperature, wax formula thermoregulator is in the closed position, and the cylinder cap water intake is closed, and water pump backwater mouth opening state forms the motor short circle, when water temperature reaches 70-75 and spends, wax formula thermoregulator is the enable possition, and the cylinder cap water intake is opened, and backwater mouth is a closed condition;
Two water outlets being arranged on the water pump body, respectively cooling liquid is sent into cylinder body and cylinder cap water jacket, also have two backwater mouths, is respectively the backwater mouth (comprising that machine oil cools off a part of backwater) that connects short circle and warm-air drier;
The water outlet of water pump directly enters cylinder body water jacket, the cylinder body water jacket water outlet is provided with a unidirectional thermoregulator, when the coolant temperature in the cylinder body reaches 85-87 when above, wax formula thermoregulator is the enable possition, the cylinder body water outlet is opened, and cooling liquid flows through cooler for recycled exhaust gas with the cooling liquid bout that cylinder cap flows out, after the exhaust gas temperature of cooling EGR, return water pump after entering the radiator cooling, form a circulation of whole cooling system.
Machine oil cooler is provided with the water intake that is connected with the cylinder body water jacket water outlet, connect the water pump backwater mouth water outlet and in the wax formula thermoregulator of exquisite paraffin is housed, when cooling liquid is normal temperature, thermoregulator is in closed condition, backwater mouth is closed, when temperature reaches 60 degree when above, thermoregulator is in the enable possition.
Said structure can make the cooling liquid cylinder block and head of inflow engine respectively, and cylinder block and head is worked in different operating temperature ranges, thereby improves engine cooling efficient, thereby creates the ideal engine temperature distribution.
Concrete technological scheme is as follows:
A kind of engine-cooling system comprises water pump, first thermoregulator, and second thermoregulator is located at the water jacket in the cylinder body and is located at the interior water jacket of cylinder cap; Water pump has two water outlets, connects cylinder body water jacket and cylinder cap water jacket respectively, and first thermoregulator is positioned at cylinder head water cover water intake, and second thermoregulator is positioned at the cylinder body water jacket water outlet, connects cylinder body water jacket and is connected waterback pump by the backwater mouth of water pump respectively with the cylinder cap water jacket.
Wherein first thermoregulator is the bidirectional temp regulation device, and described second thermoregulator is unidirectional thermoregulator.
One machine oil cooler is connected with the water outlet of cylinder body water jacket by its water intake, and is connected with a backwater mouth of water pump by its water outlet, and the 3rd thermoregulator is housed in this machine oil cooler.
Described bidirectional temp regulation device, unidirectional thermoregulator and the 3rd thermoregulator are wax formula thermoregulator, are provided with in it to be solid-state paraffin under normal temperature, make valve be in closed condition.
This system also comprises a heater switch and a warm-air drier, and a water outlet of cylinder body water jacket connects warm-air drier, and warm-air drier is connected to water pump by a backwater mouth of heater switch and water pump.
The water outlet of cylinder cap water jacket and the water outlet of cylinder body water jacket can merge and be connected to a cooler for recycled exhaust gas, are connected to water pump by a radiator of water tank again.
Described bidirectional temp regulation device, unidirectional thermoregulator is provided with different reservation temperature as required with the 3rd thermoregulator, reach separately predetermined temperature or more than, paraffin liquefaction in each thermoregulator is also opened valve, the reservation temperature of bidirectional temp regulation device is the 70-75 degree, the reservation temperature of unidirectional thermoregulator is the 85-90 degree, and the reservation temperature of the 3rd thermoregulator is 60 degree.
The bidirectional temp regulation utensil has a main valve and an auxiliary-valve, and under the normal temperature, the main valve that leads to cylinder head water cover water intake is closed, and the auxiliary-valve that leads to the water pump backwater mouth is opened.
A kind of engine-cooling system comprises water pump, the bidirectional temp regulation device, and unidirectional thermoregulator, machine oil cooler, warm-air drier, cooler for recycled exhaust gas, radiator of water tank is located at the water jacket in the cylinder body and is located at the interior water jacket of cylinder cap; Water pump has two water outlets, connects cylinder body water jacket and cylinder cap water jacket respectively, and the bidirectional temp regulation device is positioned at cylinder head water cover water intake, and unidirectional thermoregulator is positioned at the cylinder body water jacket water outlet, connects cylinder body water jacket and is connected waterback pump by the backwater mouth of water pump respectively with the cylinder cap water jacket; Machine oil cooler is connected with the water outlet of cylinder body water jacket by its water intake, and be connected with a backwater mouth of water pump by its water outlet, the 3rd thermoregulator is housed in this machine oil cooler, warm-air drier is provided with a heater switch, a water outlet of cylinder body water jacket connects warm-air drier, and warm-air drier is connected to water pump by a backwater mouth of heater switch and water pump; The water outlet of cylinder cap water jacket and the water outlet of cylinder body water jacket can merge and be connected to cooler for recycled exhaust gas, be connected to water pump by radiator of water tank again, described bidirectional temp regulation device, unidirectional thermoregulator and the 3rd thermoregulator are wax formula thermoregulator, being provided with in it under normal temperature is solid-state paraffin, makes valve be in closed condition, and different reservation temperature is set as required, reach separately predetermined temperature or more than, main valve is also opened in the paraffin liquefaction in each thermoregulator.
Compare with present prior art, beneficial effect of the present invention is embodied in: by simple control cylinder cap is worked in different operating temperature ranges with center housing temperature, the ideal engine hot working is that the cylinder head temperature is lower and block temperature is higher relatively.The cylinder head temperature is low can to improve charging efficiency, increases air inflow.Low and the air inflow of temperature can promote perfect combustion greatly, reduces the formation of NOx, also improves output power.Higher block temperature can reduce frictional loss, directly improves fuel efficiency and improves output power, surge pressure and temperature in the indirect reduction cylinder.
Description of drawings
Fig. 1: the engine-cooling system water route catenation principle figure of embodiment of the present invention.
Fig. 2: the water cycle schematic diagram when motor has just started.
Fig. 3: the schematic diagram of water cycle during machine oil cooler work
Fig. 4: the cylinder cap water jacket begins the circuit schematic diagram.
Fig. 5: water cycle schematic diagram during the motor proper functioning.
Fig. 6: water cycle schematic diagram when operator cabin needs warm braw.
Embodiment
Accompanying drawing illustrates exemplary of the present invention, and is used for together with the description explaining principle of the present invention, describes the present invention with reference to the accompanying drawings below, and it is a kind of preferred embodiment in the numerous embodiments of the present invention.
Fig. 1 visual representation the engine-cooling system water route catenation principle figure of embodiment of the present invention.
Shown in Fig. 2,3, when engine start, motor one starts, water pump 3 is started working, paraffin during normal temperature in the thermoregulator 9 are solid-state, and cylinder cap 1 water intake two-way is in punishment closes, and auxiliary-valve is in opening state, the thermoregulator 6 of cylinder body 2 water outlets and machine oil cooler 4 and 11 valve port are in closed condition, can not enter water pump 3 from the cooling liquid of radiator of water tank 7 and participate in circulation.Cooling liquid in cylinder cap 1, cylinder body 2 water jackets is heated rapidly by water jacket, like this in the extremely short time, the temperature of engine coolant machine oil was improved rapidly in the extremely short time, so still was to have improved greatly the engine warm-up time, when cylinder body 2 temperature raise, the inside paraffin of thermoregulator 11 is liquefy gradually, its volumetric expansion overcomes initial tension of spring promotion thermoregulator 11 shells and moves backward, opens backwater mouth gradually, when temperature reaches 60 degree when above, the valve wide open of thermoregulator 11.
Shown in Figure 4, when engine water temperature continues to raise, paraffin is liquefy gradually, its volumetric expansion, overcoming initial tension of spring promotion thermoregulator 9 shells moves backward, the main valve of thermoregulator 9 is opened gradually, open cylinder cap 1 water intake gradually, water pump 3 backwater mouths are closed gradually, when temperature reaches 75 degree when above, the main valve of thermoregulator 9 is opened fully, the water pump backwater mouth is by closing fully, and under the pumping action of water pump 3, the cooling liquid in the radiator of water tank 7 just enters in engine cylinder cover 1 water jacket, make the temperature cooling of cylinder cap 1, guarantee in lower temperature range work.
Shown in Figure 5, rise when the continuation of engine cylinder-body 2 temperature, the inside paraffin of thermoregulator 6 is liquefy gradually, its volumetric expansion, overcoming initial tension of spring promotion thermoregulator 6 shells moves backward, open backwater mouth gradually, when temperature reaches the 87-90 degree when above, the main valve standard-sized sheet, under the pumping action of water pump 3, cooling liquid in the radiator of water tank 7 just enters in the engine cylinder-body 2 whole water jackets, makes the temperature cooling of cylinder body 2, guarantees in suitable ideal temperature scope work.Can open temperature by two different thermoregulators as can be seen in conjunction with Fig. 4,5, can guarantee the temperature set-point work of engine cylinder-body 2, cylinder cap 1 each several part at optimum.It is maximum that the whole efficiency of cooling system reaches.Each cooling circuit will be worked under different chilling temperature set points or flow velocity, create the ideal engine temperature distribution.When improving effective engine power, also reduce the pollution from exhaust emission that motor causes environment greatly, and fuel saving effectively.
Fig. 6 when needing warm braw in the car, can open heater switch 12, and the part cooling liquid enters in 5 pairs of cars of warm-air drier by the water outlet on cylinder body 2 water jackets and heats, and makes heating in the car, gets back to water pump by heater switch 12, backwater mouth then and circulates.
In conjunction with top fundamental diagram the technical program is further described:
A kind of engine-cooling system comprises water pump 3, bidirectional temp regulation device 9, and unidirectional thermoregulator 6, machine oil cooler 4, warm-air drier 5, cooler for recycled exhaust gas 8, radiator of water tank 7 is located at water jacket and the water jacket that is located in the cylinder cap 1 in the cylinder body 2; Water pump 3 has two water outlets, connect cylinder body 2 water jackets and cylinder cap 1 water jacket respectively, bidirectional temp regulation device 9 is positioned at cylinder cap 1 water jacket water intake, and unidirectional thermoregulator 6 is positioned at cylinder body 2 water jacket water outlets, connects cylinder body 2 water jackets and is connected waterback pump 3 by the backwater mouth of water pump 3 respectively with cylinder cap 1 water jacket; Machine oil cooler 4 is connected by the water outlet of its water intake with cylinder body 2 water jackets, and be connected with a backwater mouth of water pump 3 by its water outlet, the 3rd thermoregulator 11 is housed in this machine oil cooler 4, warm-air drier 5 is provided with a heater switch 12, a water outlet of cylinder body 2 water jackets connects warm-air drier 5, and warm-air drier 5 is connected to water pump 3 by a backwater mouth of heater switch 12 and water pump 3; The water outlet of the water outlet of cylinder cap 1 water jacket and cylinder body 2 water jackets can merge and is connected to cooler for recycled exhaust gas 8, be connected to water pump 3 by radiator of water tank 7 again, described bidirectional temp regulation device 9, unidirectional thermoregulator 6 and the 3rd thermoregulator 11 are wax formula thermoregulator, being provided with in it under normal temperature is solid-state paraffin, makes valve be in closed condition, and different reservation temperature is set as required, reach separately predetermined temperature or more than, main valve is also opened in the paraffin liquefaction in each thermoregulator.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technological scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (7)
1. an engine-cooling system is characterized in that, comprises water pump (3), first thermoregulator, and second thermoregulator is located at the water jacket in the cylinder body (2) and is located at the interior water jacket of cylinder cap (1); Water pump (3) has two water outlets, connect cylinder body (2) water jacket and cylinder cap (1) water jacket respectively, first thermoregulator is positioned at cylinder cap (1) water jacket water intake, second thermoregulator is positioned at cylinder body (2) water jacket water outlet, connect cylinder body (2) water jacket and cylinder cap (1) water jacket respectively by water pump (3) thus backwater mouth be connected waterback pump (3), described first thermoregulator is bidirectional temp regulation device (9), described second thermoregulator is unidirectional thermoregulator (6), one machine oil cooler (4) is connected by the water outlet of its water intake with cylinder body (2) water jacket, and be connected with a backwater mouth of water pump (3) by its water outlet, the 3rd thermoregulator (11) is housed in this machine oil cooler (4).
2. engine-cooling system as claimed in claim 1, it is characterized in that, described bidirectional temp regulation device (9), unidirectional thermoregulator (6) and the 3rd thermoregulator (11) are wax formula thermoregulator, being provided with in it under normal temperature is solid-state paraffin, and this paraffin makes valve be in closed condition.
3. engine-cooling system as claimed in claim 1, it is characterized in that, also comprise a heater switch (12) and a warm-air drier (5), a water outlet of cylinder body (2) water jacket connects warm-air drier (5), and warm-air drier (5) is connected to water pump (3) by a backwater mouth of heater switch (12) and water pump (3).
4. engine-cooling system as claimed in claim 3 is characterized in that, the water outlet of the water outlet of cylinder cap (1) water jacket and cylinder body (2) water jacket can merge and is connected to a cooler for recycled exhaust gas (8), is connected to water pump (3) by a radiator of water tank (7) again.
5. engine-cooling system as claimed in claim 2, it is characterized in that, described bidirectional temp regulation device (9), unidirectional thermoregulator (6) is provided with different reservation temperature as required with the 3rd thermoregulator (11), reach separately predetermined temperature or more than, valve is also opened in the paraffin liquefaction in each thermoregulator.
6. engine-cooling system as claimed in claim 5 is characterized in that, the reservation temperature of bidirectional temp regulation device (9) is the 70-75 degree, and the reservation temperature of unidirectional thermoregulator (6) is the 85-90 degree, and the reservation temperature of the 3rd thermoregulator (11) is 60 degree.
7. as claim 5 or 6 described engine-cooling systems, it is characterized in that bidirectional temp regulation device (9) has a main valve and an auxiliary-valve, under the normal temperature, the main valve that leads to cylinder cap (1) water jacket water intake is closed, and the auxiliary-valve that leads to water pump (3) backwater mouth is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100217766A CN101368504B (en) | 2008-08-13 | 2008-08-13 | Cooling system of engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100217766A CN101368504B (en) | 2008-08-13 | 2008-08-13 | Cooling system of engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101368504A CN101368504A (en) | 2009-02-18 |
| CN101368504B true CN101368504B (en) | 2011-09-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100217766A Expired - Fee Related CN101368504B (en) | 2008-08-13 | 2008-08-13 | Cooling system of engine |
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| Country | Link |
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| CN (1) | CN101368504B (en) |
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2008
- 2008-08-13 CN CN2008100217766A patent/CN101368504B/en not_active Expired - Fee Related
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