CN100494650C - Engine dual-cycle forced cooling system - Google Patents
Engine dual-cycle forced cooling system Download PDFInfo
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- CN100494650C CN100494650C CNB2006100441315A CN200610044131A CN100494650C CN 100494650 C CN100494650 C CN 100494650C CN B2006100441315 A CNB2006100441315 A CN B2006100441315A CN 200610044131 A CN200610044131 A CN 200610044131A CN 100494650 C CN100494650 C CN 100494650C
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- control valve
- heat exchanger
- outer circulation
- water cavity
- flow control
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Abstract
The invention discloses an engine double circulation forced cooling system, comprising internal circulation cooling subsystem and external circulation cooling subsystem, where the pipeline of the external circulation cooling subsystem connects to the external circulation water cavity of a heat exchanger and that of the internal circulation cooling subsystem connects to the internal circulation water cavity of the heat exchanger, the pipeline of the external circulation cooling subsystem is equipped with a flow control valve able to control the flow of external circulation cooling medium passing through the heat exchange, and a temperature sensing device sampling from the internal circulation water cavity, and the temperature sensing device drives the flow control valve; when a machine is in the 'warming-up' course, the temperature sensing device controls the flow control valve to control the quantity of external circulation cooling medium entering the heat exchanger so as to achieve the purposes of fully using heat energy, shortening warming-up time, and reducing heat energy losses.
Description
Technical field
The present invention relates to the cooling system of motor.
Background technique
General three grades of cooling systems that adopt complexity on the external advanced motor, one-level circulation (circulation in the high temperature) is used to cool off body, cylinder head, and there is a thermostat inside, is used to control the temperature of one-level circuit cooling medium.Secondary circulation (circulation in the low temperature) is used to cool off intercooler, machine oil cooler, and by cools down one-level circuit cooling medium, there is a thermostat inside, is used to control the temperature of secondary circuit cooling medium.Three grades of circulations (outer circulation) are by cools down secondary circuit cooling medium.The structural feature of this system is that thermal loss is few, and the part that is corroded is few, and deficiency is that parts are many especially, and the pipeline complexity is installed trouble, is applicable to high-power diesel engine.
Domestic motor, the general dual-cycle forced cooling system that adopts of its cooling with interior circulation and outer circulation.The general cooling of interior circulation body, cylinder head, machine oil cooler, there is a thermostat inside, the interior circulating temperature when being used for raising machine " hot car " fast.Intercooler is generally cooled off in outer circulation, and by circuit cooling medium in the liquid-liquid formula cools down.The structural feature of this system is that component are few, pipeline is simple, easy for installation.
The inside major cycle of cooling medium is after water temperature is raised to uniform temperature, and thermostat is with inner short circle pathway closure, and cooling medium enters and carries out heat exchange in the heat exchanger; Because the outer circulation of cooling system is being carried out, and causes the water temperature of inner major cycle to descend rapidly easily always, its consequence will prolong motor working time at low temperatures.Especially in the winter time, when moving under the low-temperature and high-speed low-load, motor tends to occur " cold excessively " phenomenon.During the motor cold operation, under the low temperature fuel-oil atmozation bad, and lubricating oil viscosity is bigger under the low temperature, the friction pair wearing and tearing are heavier, increase the weight of the friction pair wearing and tearing. reduce engine power performance and economic indicator.
Summary of the invention
Technical problem to be solved by this invention provides the engine dual-cycle forced cooling system of a kind of motor " hot car " time weak point, high insulating effect.
For achieving the above object, technological scheme of the present invention is: engine dual-cycle forced cooling system, circulation cooling subsystem and outer circulation cooling subsystem in comprising, described outer circulation cooling subsystem pipe is connected to the outer circulation water cavity of heat exchanger, circulation cooling subsystem pipe is connected to the interior circulating water cavity of heat exchanger in described, also be provided with on the pipeline of described outer circulation cooling subsystem and can control the flow control valve of outer circulation cooling medium by the heat exchanger flow, take a sample in the temperature sensing device of interior circulating water cavity, described temperature sensing device drives described flow control valve.
As a kind of improvement, described flow control valve is arranged on the water intake of the outer circulation water cavity of heat exchanger, described temperature sensing device is arranged in the interior circulating water cavity of heat exchanger, described temperature sensing device connects by controlling rod between described temp-sensitive apparatus and the described flow control valve for temperature variation being transformed into the temp-sensitive apparatus of change in displacement.
As a kind of further improvement, described flow control valve also includes and will not enter the short circle control valve that cooling medium in the heat exchanger outer circulation water cavity is bypassed to the outer circulation exhalant canal, and the flow size of described short circle control valve and flow control valve is the inverse change of interlock.
Owing to adopt technique scheme, engine dual-cycle forced cooling system, circulation cooling subsystem and outer circulation cooling subsystem in comprising, described outer circulation cooling subsystem pipe is connected to the outer circulation water cavity of heat exchanger, circulation cooling subsystem pipe is connected to the interior circulating water cavity of heat exchanger in described, also be provided with on the pipeline of described outer circulation cooling subsystem and can control the flow control valve of outer circulation cooling medium by the heat exchanger flow, take a sample in the temperature sensing device of interior circulating water cavity, described temperature sensing device drives described flow control valve; Its advantage is:
1. when machine is in " hot car " process,, thereby control the cooling medium amount that outer circulation enters heat exchanger, to reach the purpose that makes full use of heat energy, shortening " hot car " time, reduces heat-energy losses by temperature sensing device control flow rate control valve.Particularly when severe cold season and machine are in low load operation for a long time,, more should make full use of heat energy, reduce heat energy because of forcing cooling to be lost because machine self is very strong to the external environment condition heat dissipation potential.
2. can be in " hot car " process, interior circulatory mediator temperature improves more, more helps heating machine oil, makes the machine oil rational temperature that is rapidly heated, the mechanical efficiency that suitable engine oil viscosity helps reducing parts wear and improves machine.
3. before flow control valve did not reach whole unlatchings, the distance that the cooling medium of outer circulation water pump is flowed through was few, and flow path resistance descends, and had reduced the power consumpiton of water pump.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention.
Embodiment
As shown in Figure 1, engine dual-cycle forced cooling system, circulation cooling subsystem and outer circulation cooling subsystem in comprising, described outer circulation cooling subsystem pipe is connected to the outer circulation water cavity 9 of heat exchanger, circulation cooling subsystem pipe is connected to the interior circulating water cavity 8 of heat exchanger in described, also be provided with on the pipeline of described outer circulation cooling subsystem and can control the flow control valve 4 of outer circulation cooling medium by the heat exchanger flow, take a sample in the temperature sensing device of interior circulating water cavity, described temperature sensing device drives described flow control valve 4.
Described flow control valve is arranged on the water intake 91 of the outer circulation water cavity 9 of heat exchanger, described temperature sensing device is arranged on the interior circulating water cavity interior 8 of heat exchanger, described temperature sensing device connects by controlling rod 41 between described temp-sensitive apparatus 5 and the described flow control valve 4 for temperature variation being transformed into the temp-sensitive apparatus 5 of change in displacement.
Described flow control valve also includes and will not enter the short circle control valve 61 that cooling medium in the heat exchanger outer circulation water cavity is bypassed to the outer circulation exhalant canal, and the flow size of described short circle control valve 61 and flow control valve 4 is the inverse change of interlock.
Referring to accompanying drawing 1, working procedure of the present invention is as follows:
When carrying out " hot car " behind the engine start, cooling medium in the interior circulation is successively by interior circulating water pump 10, machine oil cooler 11, machine water cavity 12, thermostat 13, because temperature is very low, at this moment cooling medium comes back to interior circulating water pump 10 through inner short circle passage 14; Continuous rising along with temperature, thermostat 13 seals inner short circle passage 14 gradually, inner loop passage 15 is opened gradually, this moment, the cooling medium of inner loop began the heat exchanger of flowing through, because the effect of temp-sensitive apparatus 5, the cooling medium of outer circulation this moment is limited and can not enter in the heat exchanger 16 by flow control valve; Along with the continuous rising of inner loop coolant temperature, the flow control valve 4 of temp-sensitive apparatus 5 controls is opened gradually, and the outer circulation cooling medium that enters in the heat exchanger 16 increases gradually, all opens until flow control valve 4, all participates in cooling system.
Cooling medium in the outer circulation, successively by outer circulation water pump 2, intercooler 3, flow control valve 4, because circulating temperature is low in this moment, temp-sensitive apparatus 5 also is failure to actuate, the external refrigeration medium flows back to water source 1 (described water source also can be an engine radiator) through outside short circle passage 6, outer circulation water cavity 9 because cooling medium is not flowed through in the heat exchanger 16, thus the heat in the circulation in avoiding taking away has reduced thermal loss.
In the continuous temperature-rise period of interior circulation, can play thermogenic action to machine oil in the machine oil cooler 11 and machine self, make machine oil can be elevated to rational temperature fast, suitable viscosity can reduce the friction between the motion component, thereby has improved mechanical efficiency.
Rising along with machine temperature, interior circuit coolant temperature raises, when it flows through temp-sensitive apparatus 5, temp-sensitive apparatus 5 automatic control flows are through the flow of outside short circle passage 6 and outside major cycle passage 7, this moment, heat exchanger 16 began to participate in cooling, and the inner medium temperature of whole interior circulation begins to reach thermal equilibrium.
The present invention has mainly solved following technical barrier:
Energy-saving effect when realizing the low temperature of three grades of cool cycles with simple secondary cooling cycle structure, can heat machine oil more apace in machine " hot car " process, reduce engine oil viscosity, to reduce the frictional loss of motion component, played the function that reduces wear and tear in machines and reduce power loss.
Enter the flow of the outer circulation cooling medium of heat exchanger with simple structure control, thereby controlled the initial temperature that interior circuit cooling medium is cooled, so more help in " hot car " process, machine oil being heated apace, reduce engine oil viscosity, to reduce the frictional loss of motion component, played the function that reduces wear and tear in machines and reduce power loss.
The principle of temp-sensitive apparatus 5 is to adopt the principle of widely used thermostat on the motor, and difference is that the temperature of the temp-sensitive apparatus of thermostat takes a sample in interior circulating water cavity 8, control be the cooling medium consumption of outer circulation; Present thermostat mostly is the wax-wrapped pill formula greatly, is that solid and volume are less when water temperature is low, and wax-wrapped pill just becomes liquid when water temperature is high, and volume will expand, and at this moment pressure just is applied on the valve rod 7, variation of temperature is converted to the variation of displacement.
The present invention is specially adapted to long-term work than motor under the low load condition or the lower motor of ambient temperature.
Claims (2)
1. engine dual-cycle forced cooling system, circulation cooling subsystem and outer circulation cooling subsystem in comprising, described outer circulation cooling subsystem pipe is connected to the outer circulation water cavity of heat exchanger, circulation cooling subsystem pipe is connected to the interior circulating water cavity of heat exchanger in described, also be provided with on the pipeline of described outer circulation cooling subsystem and can control the flow control valve of outer circulation cooling medium by the heat exchanger flow, take a sample in the temperature sensing device of interior circulating water cavity, described temperature sensing device drives described flow control valve, it is characterized in that: described flow control valve is arranged on the water intake of the outer circulation water cavity of heat exchanger, described temperature sensing device is arranged in the interior circulating water cavity of heat exchanger, described temperature sensing device connects by controlling rod between described temp-sensitive apparatus and the described flow control valve for temperature variation being transformed into the temp-sensitive apparatus of change in displacement.
2. engine dual-cycle forced cooling system as claimed in claim 1, it is characterized in that: described flow control valve also includes and will not enter the short circle control valve that cooling medium in the heat exchanger outer circulation water cavity is bypassed to the outer circulation exhalant canal, and the flow size of described short circle control valve and flow control valve is the inverse change of interlock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100441315A CN100494650C (en) | 2006-05-10 | 2006-05-10 | Engine dual-cycle forced cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100441315A CN100494650C (en) | 2006-05-10 | 2006-05-10 | Engine dual-cycle forced cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1891994A CN1891994A (en) | 2007-01-10 |
| CN100494650C true CN100494650C (en) | 2009-06-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100441315A Expired - Fee Related CN100494650C (en) | 2006-05-10 | 2006-05-10 | Engine dual-cycle forced cooling system |
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| CN (1) | CN100494650C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2479731C1 (en) * | 2009-05-07 | 2013-04-20 | Тойота Дзидося Кабусики Кайся | Transport vehicle heat exchange control device |
| JP5310867B2 (en) * | 2009-12-04 | 2013-10-09 | トヨタ自動車株式会社 | Engine cooling system |
| CN102435033B (en) | 2011-12-01 | 2014-05-14 | 国家电网公司 | Closed type circulation water cooling device and method thereof |
| CN102545546B (en) | 2011-12-01 | 2014-05-14 | 国家电网公司 | Circulation cooling system and method for controlling same |
| CN102435032B (en) | 2011-12-01 | 2014-05-14 | 国家电网公司 | Sealed type circulating water cooling device and method |
| US10222134B2 (en) * | 2016-10-06 | 2019-03-05 | Ford Global Technologies, Llc | Dual loop cooling system energy storage and reuse |
| CN111828161B (en) * | 2019-03-21 | 2021-07-13 | 福州市长乐区三互信息科技有限公司 | Multi-temperature control diesel generating set based on big data operation analysis |
| CN110685789B (en) * | 2019-10-12 | 2021-02-05 | 江苏徐工工程机械研究院有限公司 | Cooling system, engineering vehicle, control method and controller |
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2006
- 2006-05-10 CN CNB2006100441315A patent/CN100494650C/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN1891994A (en) | 2007-01-10 |
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Granted publication date: 20090603 Termination date: 20200510 |