CN109854354A - Diesel altitude-variable cooling system with variable water flow and its control process - Google Patents
Diesel altitude-variable cooling system with variable water flow and its control process Download PDFInfo
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- CN109854354A CN109854354A CN201711235751.1A CN201711235751A CN109854354A CN 109854354 A CN109854354 A CN 109854354A CN 201711235751 A CN201711235751 A CN 201711235751A CN 109854354 A CN109854354 A CN 109854354A
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- 238000001816 cooling Methods 0.000 title claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims description 9
- 230000008569 process Effects 0.000 title claims description 7
- 239000000498 cooling water Substances 0.000 claims abstract description 57
- 239000002826 coolant Substances 0.000 claims abstract description 45
- 230000008859 change Effects 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 15
- 239000010720 hydraulic oil Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 230000000052 comparative effect Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims 1
- 230000004087 circulation Effects 0.000 description 3
- 239000012188 paraffin wax Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000009131 signaling function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
Classifications
-
- 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
- F01P7/02—Controlling of coolant flow the coolant being cooling-air
- F01P7/04—Controlling of coolant flow the coolant being cooling-air by varying pump speed, e.g. by changing pump-drive gear ratio
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Control Of Temperature (AREA)
Abstract
A kind of diesel altitude-variable cooling system with variable water flow, including become height above sea level and become coolant rate system, become height above sea level change cooling air delivery system and control system；It includes variable flow cooling water pump, temperature thermostat, radiator that the change height above sea level, which becomes coolant rate system,；The cooling fan for becoming height above sea level change cooling air delivery system is connect with hydraulic control device；The control system includes ECU control unit, the temperature sensor for the coolant outlet road being mounted between diesel engine outlet and temperature thermostat, the temperature sensor of coolant pipe road for being mounted on radiator outlet, the flow sensor for the coolant outlet road being mounted between diesel engine outlet and temperature thermostat and two coolant rate sensors for being separately mounted to two exits of temperature thermostat.The system may be implemented in 0~5500m altitude ranges, the real-time optimistic control of diesel engine cooling intensity.
Description
Technical field
The present invention relates to Diesel Engine Technique Field, more particularly to a kind of diesel altitude-variable cooling system with variable water flow and its
Control process.
Background technique
The chain drives such as vehicle, engineering machinery are when plateau is run, due to heat dissipation performance variation and diesel oil machine-heating load
Increase etc. lead to problems such as diesel engine occur cooling water easily boils, the decline of cooling system cooling capacity, body easily overheat, and will most
Diesel engine is caused to there is different degrees of decline in highlands continuous operation ability and operation intensity eventually.These problems can be with
It is attributed to diesel engine cooling system and working process of diesel engine matching is deteriorated.
Traditional diesel engine cooling system directly drives part of cooling system (water by V belt translation by crankshaft of diesel engine
Pump, fan).The cooling capacity of this cooling system be according to diesel engine maximum heating load operating condition design, cannot be according to diesel oil
The cooling radiating requirements of machine variable working condition are adjusted in real time, this limitation, which results in diesel engine tradition cooling system, can not adapt to different seas
It pulls out, the cooling requirement under operating condition, causes cooling insufficient or low altitude area sub-load undercooling under High aititude, and mechanical cold
But system energy consumption is big, and the power consumption under constant engine operating condition accounts for 5%~12% that engine effectively exports, with fast state
When clutch, biggish thermal shock stress is brought to engine.Since paraffin thermostat has the characteristic of response delay and " hysteresis ",
It can not be made and be answered according to the variation of engine water temperature in real-time, accurate noon, there are thermostats not to fully open, cooling wind
Fan but starts to strengthen the case where radiating to radiator, since coolant liquid flows through radiator there is no whole, so cooling fan
Radiating efficiency reduces.The flow for adjusting water circulating pump is the total flow for changing coolant liquid circulation, coolant liquid systemic circulation flow
How much specifically changed with partial circulating flow is influenced by thermostat aperture, and the aperture of paraffin thermostat and coolant temperature it
Between be not one-to-one relationship, paraffin thermostat can not achieve the accurate control to the distribution of coolant liquid large and small circular flow.
Currently, being directed to the improvement of diesel engine cooling system mainly around in the single of part of cooling system (such as water pump, fan, thermostat)
Control aspect, but under the particular surroundings of plateau, the heat dissipation that the optimal control of single part is insufficient for diesel altitude-variable needs
It asks, therefore carry out integrated control to cooling system to become the cooling necessary means of High Altitude Diesel Engine.
Summary of the invention
For technological deficiency existing for existing diesel High aititude cooling system, the present invention provides a kind of diesel engine High aititude
Cooling system with variable water flow, the system can join according to high altitude environments conditions such as Different Altitude atmospheric pressure, temperature, coolant liquid boiling points
Several and cooling system thermal parameter and Different Altitude diesel engine Warm status, to Diesel Engine Coolants total flow, large and small cycles stream
Amount and cooling air delivery carry out Collaborative Control, realize in 0~5500m altitude ranges, diesel engine cooling intensity it is real-time
Optimum control.
As above design, the technical scheme is that a kind of diesel altitude-variable cooling system with variable water flow, including become height above sea level
Become coolant rate system, become height above sea level change cooling air delivery system and control system；The change height above sea level becomes coolant rate system
System includes variable flow cooling water pump, temperature thermostat, radiator；It includes cooling that the change height above sea level, which becomes cooling air delivery system,
Fan；The cooling fan is connect with hydraulic control device；The control system includes ECU control unit, is mounted on diesel engine
The temperature sensor of coolant outlet road between outlet and temperature thermostat, the coolant liquid for being mounted on radiator outlet
The flow of temperature sensor, the coolant outlet road being mounted between diesel engine outlet and temperature thermostat on pipeline
Sensor and two coolant rate sensors for being separately mounted to two exits of temperature thermostat, ECU control unit with
Proportional pressure control valve, coolant liquid sensor, flow sensor, variable flow cooling water pump are connected with temperature thermostat, control ratio
The aperture of the aperture of overflow valve, the revolving speed of variable flow cooling water pump and temperature thermostat.
Above-mentioned hydraulic control device includes the hydraulic circuit being made of hydraulic oil container, hydraulic oil pump and hydraulic motor,
And proportional pressure control valve is bridged on the hydraulic circuit, hydraulic motor is connect with hydraulic fan.
Above-mentioned ECU control unit includes power module, microcontroller ATmeaga128 single-chip microcontroller, signal acquisition module, defeated
Control module and communication interface out, the analog input in the signal acquisition module have: atmosphere pressure signal, environment temperature
Signal, atmospheric density signal, coolant liquid boiling point signal and throttle position signal, digital quantity input have: engine rotational speed signal, row
Speed signal and malfunction coefficient switching signal are sailed, the output control module object is temperature thermostat, variable flow cooling
Current information can be fed back to Computer display by water pump and proportional pressure control valve, the communication interface.
The control process of above-mentioned diesel altitude-variable cooling system with variable water flow, includes the following steps:
1) after engine start, ECU reads current environment pressure, temperature and diesel engine speed, load first and passes through mark
Determine MAP and obtains thermostat aperture and cooling water pump revolving speed under current state；
2) ECU reads current cooling water temperature, if water temperature is lower than minimum target value (Tmin), ECU calculates measured value and target
Deviation between value reads thermostat aperture and cooling water pump revolving speed MAP, adjusts the duty ratio of PWM in driving circuit, and control is held
Row device, by the Collaborative Control to thermostat aperture and cooling water pump revolving speed, reasonable distribution cooling water total flow and large and small circulation
Flow makes cooling water temperature rising reach target value, realizes the collaborative feedback control for becoming height above sea level cooling system with variable water flow；If water temperature
Higher than minimum target value and it is lower than highest goal value (Tmax), thermostat aperture and cooling water pump revolving speed remain unchanged；If water temperature is high
In highest goal value, ECU calculates the deviation between measured value and target value, reads thermostat aperture and cooling water pump revolving speed MAP,
Collaborative Control thermostat aperture and cooling water pump revolving speed, make cooling water temperature reach target value；If water temperature is higher than highest goal value,
And cooling water temperature cannot be made to be reduced to highest goal value hereinafter, ECU is inquired by the Collaborative Control of thermostat and cooling water pump
Proportional overflow valve opening MAP realizes thermostat, cooling water pump, cooling wind by the control of actuator comparative example overflow valve opening
The Collaborative Control of fan.
The present invention has the advantage that and good effect:
The present invention becomes height above sea level change coolant rate system and is opened by control variable flow cooling pump rotary speed, temperature thermostat
Degree control coolant rate becomes height above sea level change cooling air delivery system and passes through the proportional overflow in control hydraulic-driven cooling fan
Valve opening controls cooling fan rotation speed and changes cooling air delivery.
For the present invention under conditions of becoming height above sea level, variable working condition, the ECU in control system is (big according to Different Altitude environmental condition
Atmospheric pressure, atmospheric temperature, coolant liquid boiling point) and diesel engine condition (revolving speed, load), inquiry proportional overflow valve opening, section temperature
Device aperture and cooling water pump revolving speed MAP are converted to analog signal to actuator by electric signal, and real-time control cooling fan ratio is overflow
Valve opening, thermostat aperture and cooling water pump revolving speed are flowed, to realize diesel engine cooling in 0m~5500m altitude ranges
The optimum control of liquid total flow, large and small cycles flow and cooling air delivery.
Detailed description of the invention
Fig. 1 is overall design drawing of the invention；
Fig. 2 is ECU control unit schematic diagram of the invention；
Fig. 3 is control system flow chart of the invention.
In figure: 1- engine；2- control unit (ECU)；3- radiator；4- temperature thermostat；5- hydraulic motor；6- becomes
Flow water pump；7,8- cooling-water temperature transmitter；9,10,11- coolant rate sensor；12- hydraulic oil pump；13- hydraulic oil
Case；14- oil filter；15- oil cooler；16- proportional pressure control valve；17- power supply；18- cooling fan；19- temperature thermostat section temperature
Device actuator；20- variable water pump actuator；21- hydraulic fan proportional overflow valve actuator.
Specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.It should be appreciated that described herein
Specific embodiment be only used to explain the present invention, be not intended to limit the present invention.
A kind of diesel altitude-variable cooling system with variable water flow as shown in Figure 1: becomes coolant rate system by change height above sea level, becomes
Height above sea level becomes cooling air delivery system and control system composition.The change height above sea level becomes coolant rate system by radiator 3, unsteady flow
Cooling water pump 6, the composition of temperature thermostat 4 are measured, the change height above sea level becomes cooling air delivery system by hydraulic oil container 13, hydraulic oil
Pump 12, proportional pressure control valve 16, hydraulic motor 5, cooling fan 18 form, wherein hydraulic oil container, hydraulic oil pump and hydraulic motor group
At hydraulic circuit, and proportional pressure control valve is bridged on the hydraulic circuit, hydraulic motor is connect with hydraulic fan；The control
System processed is made of ECU control unit 2, temperature sensor, flow sensor.Variable flow cooling water pump is driven by motor, cooling
Fan is driven by hydraulic system, by ECU control proportional overflow valve opening, pump rotary speed and thermostat aperture.The coolant liquid temperature
Degree sensor 7, coolant rate sensor 11 are mounted on the coolant outlet between diesel engine outlet and temperature thermostat
On the road, coolant rate sensor 9,10 is separately mounted to two exits of thermostat, and the cooling-water temperature transmitter 8 is pacified
Mounted in the coolant pipe road of radiator outlet；The electronic control unit ECU includes power module, microcontroller
ATmeaga128 single-chip microcontroller, signal acquisition module, output control module and communication interface, the analog quantity in signal acquisition module
Input has: the input signals such as atmosphere pressure signal, ambient temperature signal, atmospheric density signal, coolant liquid boiling point signal, digital quantity
Input has: diesel engine speed signal, speed of operation signal and malfunction coefficient switching signal etc., the output control of ECU control unit
Object is thermostat 4, variable water pump 6 and proportional pressure control valve 16；Current information can be fed back to computer by its communication interface
Display.
Realization principle of the present invention is as follows:
The system is by high altitude environments conditional parameter and cooling systems such as Different Altitude atmospheric pressure, temperature, coolant liquid boiling points
System thermal parameter and Different Altitude diesel engine Warm status are converted into digital signal and are transmitted to ECU, and ECU is according to input signal, inquiry
Proportional overflow valve opening, thermostat aperture and cooling water pump revolving speed MAP are converted to analog signal to actuator, reality by electric signal
When control cooling fan proportional overflow valve opening, thermostat aperture and cooling water pump revolving speed.The system is a kind of dynamic random
Observing and controlling feedback system, can pass through the duty ratio for adjusting PWM in driving circuit according to current water temperature and target water temperature, and change is output to
The average voltage of direct current generator, to complete to Diesel Engine Coolants total flow and large and small cycles assignment of traffic and cooling air stream
Amount carries out Collaborative Control.Using the control mode, cooling system energy consumption can be saved to the maximum extent, improve radiating efficiency, 0~
In 5500m altitude ranges, the real-time optimistic control of diesel engine cooling intensity is realized.
Control process of the invention includes the following steps:
1) after engine start, ECU reads current environment pressure, temperature and diesel engine speed, load first and passes through mark
Determine MAP and obtains thermostat aperture and cooling water pump revolving speed under current state；
2) ECU reads current cooling water temperature, if water temperature is lower than minimum target value (Tmin), ECU calculates measured value and target
Deviation between value reads thermostat aperture and cooling water pump revolving speed MAP, adjusts the duty ratio of PWM in driving circuit, and control is held
Row device, by the Collaborative Control to thermostat aperture and cooling water pump revolving speed, reasonable distribution cooling water total flow and large and small circulation
Flow makes cooling water temperature rising reach target value, realizes the collaborative feedback control for becoming height above sea level cooling system with variable water flow；If water temperature
Higher than minimum target value and it is lower than highest goal value (Tmax), thermostat aperture and cooling water pump revolving speed remain unchanged；If water temperature is high
In highest goal value, ECU calculates the deviation between measured value and target value, reads thermostat aperture and cooling water pump revolving speed MAP,
Collaborative Control thermostat aperture and cooling water pump revolving speed, make cooling water temperature reach target value；If water temperature is higher than highest goal value,
And cooling water temperature cannot be made to be reduced to highest goal value hereinafter, ECU is inquired by the Collaborative Control of thermostat and cooling water pump
Proportional overflow valve opening MAP realizes thermostat, cooling water pump, cooling wind by the control of actuator comparative example overflow valve opening
The Collaborative Control of fan.
Claims (4)
1. a kind of diesel altitude-variable cooling system with variable water flow, including change height above sea level becomes coolant rate system, change height above sea level turns cold but
Air mass flow system and control system；It includes variable flow cooling water pump, temperature section that the change height above sea level, which becomes coolant rate system,
Warm device, radiator；It includes cooling fan that the change height above sea level, which becomes cooling air delivery system,；It is characterized by: the cooling fan
It is connect with hydraulic control device；The control system includes ECU control unit, is mounted on engine export and temperature thermostat
Between coolant outlet road cooling-water temperature transmitter, be mounted on radiator outlet coolant pipe road cooling
Liquid temperature sensor, the coolant outlet road being mounted between engine export and temperature thermostat coolant rate
Sensor and two coolant rate sensors for being separately mounted to two exits of temperature thermostat, ECU control unit with
Proportional pressure control valve, coolant liquid sensor, coolant rate sensor, variable flow cooling water pump are connected with temperature thermostat, control
The aperture of the aperture of proportional pressure control valve processed, the revolving speed of variable flow cooling water pump and temperature thermostat, in 0m~5500m height above sea level model
In enclosing, the real-time optimistic control of Diesel Engine Coolants total flow, large and small cycles flow and cooling air delivery is realized.
2. diesel altitude-variable cooling system with variable water flow according to claim 1, it is characterised in that: above-mentioned hydraulic control dress
The hydraulic circuit including being made of hydraulic oil container, hydraulic oil pump and hydraulic motor is set, and is bridged on the hydraulic circuit
Proportional pressure control valve, hydraulic motor are connect with hydraulic fan.
3. diesel altitude-variable cooling system with variable water flow according to claim 1, it is characterised in that: above-mentioned ECU control is single
Member includes that power module, microcontroller ATmeaga128 single-chip microcontroller, signal acquisition module, output control module and communication connect
Mouthful, the analog input in the signal acquisition module has: atmosphere pressure signal, ambient temperature signal, atmospheric density signal, cold
But liquid boiling point signal and throttle position signal, digital quantity input have: engine rotational speed signal, speed of operation signal and failure are aobvious
Show switching signal, the output control module object is temperature thermostat, variable flow cooling water pump and proportional pressure control valve, institute
Computer display can be fed back to for current information by stating communication interface.
4. a kind of control process of diesel altitude-variable cooling system with variable water flow according to claim 1, it is characterised in that:
Include the following steps:
1) after engine start, ECU reads current environment pressure, temperature and diesel engine speed, load first and passes through calibration MAP
Obtain thermostat aperture and cooling water pump revolving speed under current state；
2) ECU reads current cooling water temperature, if water temperature is lower than minimum target value (Tmin), ECU calculate measured value and target value it
Between deviation, read thermostat aperture and cooling water pump revolving speed MAP, adjust the duty ratio of PWM in driving circuit, control executes
Device, by the Collaborative Control to thermostat aperture and cooling water pump revolving speed, reasonable distribution cooling water total flow and large and small recycle stream
Amount makes cooling water temperature rising reach target value, realizes the collaborative feedback control for becoming height above sea level cooling system with variable water flow；If water temperature is high
In minimum target value and it is lower than highest goal value (Tmax), thermostat aperture and cooling water pump revolving speed remain unchanged；If water temperature is higher than
Highest goal value, ECU calculate the deviation between measured value and target value, read thermostat aperture and cooling water pump revolving speed MAP, association
With control thermostat aperture and cooling water pump revolving speed, cooling water temperature is made to reach target value；If water temperature is higher than highest goal value, and
Cooling water temperature cannot be made to be reduced to highest goal value by the Collaborative Control of thermostat and cooling water pump hereinafter, ECU inquires ratio
Example overflow valve opening MAP realizes thermostat, cooling water pump, cooling fan by the control of actuator comparative example overflow valve opening
Collaborative Control.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235751.1A CN109854354A (en) | 2017-11-30 | 2017-11-30 | Diesel altitude-variable cooling system with variable water flow and its control process |
| PCT/CN2018/103189 WO2019105079A1 (en) | 2017-11-30 | 2018-08-30 | Diesel engine variable-altitude variable-flow cooling system and control process therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711235751.1A CN109854354A (en) | 2017-11-30 | 2017-11-30 | Diesel altitude-variable cooling system with variable water flow and its control process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109854354A true CN109854354A (en) | 2019-06-07 |
Family
ID=66665326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711235751.1A Pending CN109854354A (en) | 2017-11-30 | 2017-11-30 | Diesel altitude-variable cooling system with variable water flow and its control process |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109854354A (en) |
| WO (1) | WO2019105079A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112555010A (en) * | 2019-09-25 | 2021-03-26 | 北京京东乾石科技有限公司 | Temperature control method, device and system for aviation piston engine |
| CN112746891A (en) * | 2019-10-31 | 2021-05-04 | 日立汽车系统(苏州）有限公司 | Engine coolant control system and engine coolant control method |
| CN113494347A (en) * | 2021-08-09 | 2021-10-12 | 一汽解放汽车有限公司 | Control method of engine cooling system and engine cooling system |
| CN113734382A (en) * | 2021-09-24 | 2021-12-03 | 合肥康东柴油机配套有限公司 | Cooling system and cooling method for diesel engine in ship and ocean engineering |
| CN115992772A (en) * | 2023-03-23 | 2023-04-21 | 潍柴动力股份有限公司 | Engine control method, device, equipment and storage medium |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114076042A (en) * | 2020-08-11 | 2022-02-22 | 郑州宇通客车股份有限公司 | Engine heat management method and vehicle adopting same |
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| CN113494347A (en) * | 2021-08-09 | 2021-10-12 | 一汽解放汽车有限公司 | Control method of engine cooling system and engine cooling system |
| CN113734382A (en) * | 2021-09-24 | 2021-12-03 | 合肥康东柴油机配套有限公司 | Cooling system and cooling method for diesel engine in ship and ocean engineering |
| CN115992772A (en) * | 2023-03-23 | 2023-04-21 | 潍柴动力股份有限公司 | Engine control method, device, equipment and storage medium |
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| Publication number | Publication date |
|---|---|
| WO2019105079A1 (en) | 2019-06-06 |
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Application publication date: 20190607 |