CN218816630U - Engine cooling device applying double electric control flow valve - Google Patents
Engine cooling device applying double electric control flow valve Download PDFInfo
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- CN218816630U CN218816630U CN202223495329.9U CN202223495329U CN218816630U CN 218816630 U CN218816630 U CN 218816630U CN 202223495329 U CN202223495329 U CN 202223495329U CN 218816630 U CN218816630 U CN 218816630U
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Abstract
The application provides an use two electric control flow valve engine cooling device, relates to engine cooling technical field, including the control by temperature change disk seat, parallelly connected two water outlet chamber ways that are provided with in control by temperature change disk seat top, and two water outlet chamber say the top and converge and feed through the engine outlet pipe, and control by temperature change disk seat side is provided with little circulating pipe, all is provided with an automatically controlled flow valve on every water outlet chamber way. This application utilizes the parallel design of double current way valve, reduces the flow resistance by a wide margin, compares and uses single valve body control, and the probability that the double valve synchronous fault appears is extremely low, effectively stops the engine because of the high temperature inefficacy problem that single valve body jamming arouses. And because the electronic control circulation valve is controlled by the ECU, the electronic control circulation valve is quickly opened and closed, and the response time of the engine caused by high water temperature is greatly reduced, so that the normal work of the engine cooling system is ensured.
Description
Technical Field
The application belongs to the technical field of engine cooling, and particularly relates to an engine cooling device applying a dual-electric-control flow valve.
Background
The cooling modes of diesel engines are classified into water cooling and air cooling. The water cooling mode takes water as a medium to transfer heat generated by the diesel engine. The water-cooled diesel engine has good cooling effect, is suitable for a high-power diesel engine, and is convenient for adjusting the cooling intensity when the temperature or the working load changes, so that the diesel engine always works in the specified temperature range (65-95 ℃). In addition, the preheating can be carried out by a hot water filling method in winter, and the starting is convenient.
The thermostat part that current diesel engine used, through inside temperature sensing wax package, the cooling liquid temperature of feeling realizes the design of switching.
However, in the process of implementing the technical solution in the embodiment of the present application, the inventors of the present application find that the above-mentioned technology has at least the following technical problems:
(1) The existing thermostat component has the same platform project, the flow area is small, and the flow assembly resistance is more than or equal to 50kpa;
(2) The existing thermostat component has long corresponding period, and the time is 90-120 seconds;
(3) The existing thermostat part is in a dynamic opening degree, and the thermostat is in a continuous action state due to water temperature fluctuation, so that the service life of the thermostat is seriously influenced, and further the function failure is caused.
Disclosure of Invention
In order to overcome the defects of small flow area, long reaction period, short service life and the like of the existing thermostat component, the embodiment of the application provides the engine cooling device applying the dual-electric-control flow valve, the cooling device is formed by connecting the dual-electric-control flow valve in parallel, an ECU sends the same message, the electric-control flow valve is opened and closed after receiving an instruction, the electric-control flow valve rotates through a self-contained motor, the inner core of the valve body is controlled to rotate, and the corresponding conversion of the message and the flow is realized; meanwhile, the ECU controls the opening temperature and the fan rotating speed of the electric control fan after receiving the instruction, and the engine reduces the fuel injection quantity of an engine fuel injection nozzle, limits the torque of the engine and reduces the rotating speed of the engine after receiving the instruction, so that the normal work of an engine cooling system is ensured. And the flow resistance is greatly reduced by utilizing the parallel design of the double-flow valve, compared with the control by using a single valve body, the probability of synchronous faults of the double valves is extremely low, and the problem of high-temperature failure of the engine caused by the clamping stagnation of the single valve body is effectively solved.
The technical scheme adopted by the embodiment of the application for solving the technical problem is as follows:
an engine cooling device applying a double electric control flow valve,
the device comprises a temperature-controlled valve seat;
two water outlet cavity channels are arranged above the temperature control valve seat in parallel, and the top ends of the two water outlet cavity channels are converged and communicated with an engine water outlet pipe; a small circulating water pipe is arranged on the side edge of the temperature control valve seat;
wherein, each water outlet cavity channel is provided with an electric control circulating valve;
during large circulation, the electric control circulation valve controls the cooling liquid to flow into the water outlet pipe of the engine;
and when the circulation is small, the electric control circulation valve controls the cooling liquid to flow into the small circulation water pipe.
Wherein, the electric control flow valve is the prior electric control flow valve.
The electric control circulation valve is integrated on the water outlet cavity channel, and the temperature control valve seat is provided with a degassing interface and a water temperature sensor.
A method of engine cooling using a dual electrically controlled flow valve, the method comprising:
calculating the target heat dissipation Q of the engine w ；
The water inlet temperature and the water outlet temperature of the engine are collected constantly, and the ECU forms a real-time difference value delta t by calculating the difference value of the water inlet temperature and the water outlet temperature w Based on the water circulation flow q at the rotation speed Vw Form the real-time simulated heat dissipation Q w1 ；
By comparing Q w And Q w1 Making an alignment or Δ t w The ECU constantly adjusts the opening degree of the electric control circulating valve, the opening temperature of the electric control fan, the rotating speed of the fan and the oil injection quantity of an engine oil nozzle, so that the normal work of an engine cooling system is ensured.
If Q w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, triggering electric signal feedback, sending a CAN communication signal by the ECU, gradually opening the electric control circulation valve, and if Q CAN be met w1 ≤Q w And Δ t w The electric control circulation valve is closed at the temperature of less than or equal to 10 ℃;
if Q w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, the triggering electric signal is fed back, the ECU sends a CAN communication signal, the electric control circulation valve is fully opened, and the Q is still kept w1 ＞Q w Or Δ t w More than 10 ℃ electrically controlledThe fan is gradually turned on if Q can be satisfied w1 ≤Q w And Δ t w The temperature is less than or equal to 10 ℃, the electric control fan is closed, and the electric control circulation valve is closed;
if Q w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, the triggering electric signal is fed back, the ECU sends a CAN communication signal, the electric control circulation valve is fully opened, and the Q is still kept w1 ＞Q w Or Δ t w More than 10 ℃, the electric control fan is opened and runs at full rotating speed, if Q can be satisfied w1 ≤Q w And Δ t w The temperature is less than or equal to 10 ℃, the electric control fan is closed, and the electric control circulation valve is closed;
if Q w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, the triggering electric signal is fed back, the ECU sends a CAN communication signal, the electric control circulation valve is fully opened, and the Q is still kept w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, the electric control fan is turned on and runs at full rotation speed, and Q is still kept w1 ＞Q w Or Δ t w When the temperature is higher than 10 ℃, the ECU sends CAN communication signals, the fuel injection quantity of an engine fuel injection nozzle is reduced, the engine is limited in torsion, the rotating speed of the engine is reduced, and if the Q CAN be met w1 ≤Q w And Δ t w And (4) closing the electric control fan and the electric control circulation valve at the temperature of less than or equal to 10 ℃.
The calculated engine target heat dissipation Q w The calculation formula of (2) is as follows:
Q w ＝(A*g e *P e *H u )/3600
in the formula: q w Is heat, unit: kJ/h;
a is a proportionality coefficient which means the percentage of heat of a cooling system in heat energy of fuel, and A is a diesel engine and takes the value of 0.18-0.25; g e Is the specific fuel consumption, unit: g/(kW.h); p e Effective power, unit: kW; h u Is low heating value fuel, and the unit: kJ/kg;
the water circulation flow rate q Vw The calculation formula of (2) is as follows:
q Vw ＝q Vp *η V
in the formula: q. q.s Vw The unit is the cooling water circulation flow: m is 3 /h；η V For volumetric efficiency of the pump, takeA value of 0.6-0.85;
the real-time mimicry heat dissipation Q w1 The calculation formula of (2) is as follows:
Q w1 ＝q Vw *(△t w *ρ w *c pw )
in the formula: q w1 Is heat, unit: kJ/h; q. q of Vw Flow, unit: m is 3 /h；△t w For the permissible temperature difference when the coolant circulates in the internal combustion engine, the unit: DEG C; rho w As coolant density, unit: kg/m 3 ；c pw Constant pressure heat capacity for coolant ratio, unit: kJ/(kg. Deg.C).
The embodiment of the application has the advantages that:
1. the technical means that the double electric control flow valves are connected in parallel is adopted, so that the flow resistance is greatly reduced, compared with the control by using a single valve body, the probability of synchronous faults of the double valves is extremely low, and the problem of high-temperature failure of the engine caused by clamping stagnation of the single valve body is effectively solved.
2. Because automatically controlled circulation valve passes through ECU control, through feeling external factors such as engine water temperature, engine speed, gearbox gear, retarber moment of torsion, retarber temperature, in-cylinder brake state, realize the quick switching of automatically controlled circulation valve, greatly reduce the engine response time that the temperature height of water leads to guarantee engine cooling system normal work.
Drawings
FIG. 1 is a flow chart of operation of a cooling system for an engine;
FIG. 2 is a front view of the installation structure of the dual electrically controlled flow valve of the present application;
FIG. 3 is a rear view of the mounting structure of the dual electrically controlled flow valve of the present application;
FIG. 4 is a flow chart illustrating the control of the cooling system of the present application;
FIG. 5 is a flow chart of an electronically controlled flow valve closing control;
FIG. 6 is a flow chart of the electronically controlled flow valve self-cleaning control.
Detailed Description
The embodiment of the application provides an engine cooling device applying a dual electric control flow valve, so that the problem of high-temperature failure caused by clamping stagnation of a single valve body in the prior art is solved, meanwhile, in the control method, an ECU sends the same message, the electric control flow valve is opened and closed after receiving an instruction, the electric control flow valve rotates through a self-contained motor, an inner core of the valve body is controlled to rotate, and the corresponding conversion between the message and the flow is realized; meanwhile, the ECU controls the opening temperature and the fan rotating speed of the electric control fan after receiving the instruction, and the engine reduces the fuel injection quantity of an engine fuel injection nozzle, limits the torque of the engine and reduces the rotating speed of the engine after receiving the instruction, so that the normal work of an engine cooling system is ensured. And the flow resistance is greatly reduced by utilizing the parallel design of the double-flow valve, compared with the control by using a single valve body, the probability of synchronous faults of the double valves is extremely low, and the problem of high-temperature failure of the engine caused by the clamping stagnation of the single valve body is effectively solved.
In order to solve the above problems, the technical solution in the embodiment of the present application has the following general idea:
the engine ECU is an abbreviation of Electronic Control Unit, i.e. an Electronic controller Unit, also called as a driving computer of the automobile, and is used for controlling the driving state of the automobile and realizing various functions thereof. The automobile is mainly characterized in that the automobile state and the intention of a driver are judged by data acquisition and exchange of various sensors and buses, and the automobile is controlled by an actuator.
As shown in fig. 1, the working flow diagram of the cooling system of the engine is shown, in which a water pump pumps coolant, and the coolant passes through the engine (oil cooler, water jacket of the whole engine, etc.), a thermostat, a radiator, and a warm air core, and finally returns to the water pump to circulate back and forth. When the engine is just started, the water temperature is low, the thermostat is not opened, the water flows in the engine in a circulating manner, and the water temperature can be quickly increased, namely a small circulation; when the engine continuously runs at a high speed, the water temperature rises rapidly, the thermostat is opened, the cooling liquid enters the radiating fins of the radiator, the water flow area is increased through the radiating fins arranged in multiple layers, the heat of the cooling liquid is quickly taken away by utilizing the fan of the engine or the fan arranged in a whole vehicle plant, and finally the cooling liquid returns to the water pump to circulate, so that the engine is normally operated at a reasonable water temperature, and the circulation is called as major circulation.
The thermostat is a valve for controlling the flow path of the cooling liquid, and is a thermostat, usually including a temperature sensing element, which opens and closes the flow of air, gas or liquid by thermal expansion or contraction. The thermostat automatically adjusts the water quantity entering the radiator according to the temperature of the cooling water, changes the circulation range of the water, so as to adjust the heat dissipation capacity of the cooling system and ensure that the engine works in a proper temperature range. The thermostat must maintain good state of the art or otherwise seriously affect the proper operation of the engine. If the main valve of the thermostat is opened too late, the engine is overheated; if the main valve is opened too early, the preheating time of the engine is prolonged, and the temperature of the engine is too low.
The main thermostat used is a wax thermostat, when the cooling temperature is lower than the specified value, the refined paraffin in the thermostat temperature sensing body is in a solid state, the thermostat valve closes the passage between the engine and the radiator under the action of the spring, and the cooling liquid returns to the engine through the water pump to perform small circulation in the engine. When the temperature of the cooling liquid reaches a specified value, the paraffin starts to melt and gradually becomes liquid, the volume is increased along with the melting of the paraffin, and the rubber tube is pressed to contract. When the rubber tube contracts, the rubber tube acts on the push rod with upward thrust, and the push rod pushes the valve downwards to open the valve. At this time, the cooling liquid flows back to the engine through the radiator and the thermostat valve and then through the water pump to perform large circulation.
Wax formula thermostat passes through inside temperature sensing wax package, and the perception coolant temperature realizes the switching, and this structure flow area is little to circulation assembly resistance is big, and reaction period is longer, and for dynamic aperture, the temperature fluctuation leads to the thermostat to be in and lasts the action state, seriously influences temperature-conserving life, and then causes the function failure.
The existing diesel engine industry does not have a temperature control valve which is applied in a matched mode in batches, and market customers are more harsh on the application scene working conditions of the diesel engine, for example: the supporting hydraulic retarber motorcycle type of demand, it carries on the goods low-speed big moment of torsion climbing stage or the high downhill path operating mode of empty wagon, and when the retarber was opened, the temperature intensification rose, realizes the temperature saver that the temperature reduces fast, and the time of opening is complained for entirely: the temperature saver is less than or equal to 2s, and the current temperature saver can not meet the requirement.
As shown in fig. 2 and 3, fig. 2 is a front view of an installation structure of the dual electric control flow valve of the present application; fig. 3 is a rear view of the mounting structure of the dual electrically controlled flow valve of the present application. In order to solve the problems, the engine cooling device applying the dual-electric-control flow valve comprises a temperature control valve seat 1, an engine water outlet pipe 2, a small circulating water pipe 3 and an electric-control flow valve 4, wherein two water outlet cavity channels are arranged above the temperature control valve seat 1 in parallel, and the top ends of the two water outlet cavity channels are converged and communicated with the engine water outlet pipe 2; a small circulating water pipe 3 is arranged on the side edge of the temperature control valve seat 1; each water outlet channel is provided with an electric control circulation valve 4.
The cooling liquid passes through the temperature control valve seat 1 and then passes through the electric control circulation valve 4, the electric control circulation valve 4 controls the cooling liquid to flow into the engine water outlet pipe 2, the cooling liquid enters the radiating fins of the radiator, the water flow area is increased through the radiating fins arranged in multiple layers, the heat of the cooling liquid is quickly taken away by utilizing the fan of the engine or the fan arranged in a whole vehicle plant, and finally the cooling liquid returns to the water pump to circulate to and fro, so that the engine is maintained at a reasonable water temperature to normally run, and the major circulation is completed.
The electric control circulation valve 4 controls the cooling liquid to flow into the small circulation water pipe 3, the cooling liquid circularly flows in the engine, the water temperature can be quickly increased, and the small circulation is completed. The default state of the electric control circulation valve 4 is the passage state of the small circulation water pipe 3, if the engine is stopped at the last time, the electric control circulation valve 4 is stopped at an unknown state, and when the engine is started again, the electric control circulation valve can be quickly returned to the small circulation working state.
In the above scheme, through the parallel design of the double-flow electronic control circulation valve 4, the flow resistance is greatly reduced, compared with the control by using a single valve body, the probability of synchronous faults of the double-flow electronic control circulation valve 4 is extremely low, and the problem of high-temperature failure of the engine caused by clamping stagnation of the single valve body is effectively solved.
Meanwhile, the system is formed by connecting the dual electric control flow valves 4 in parallel, the ECU sends the same message, and the electric control flow valves 4 are opened and closed after receiving the instruction. The electric control circulation valve 4 controls the rotation of the inner core of the valve body through the rotation of a self-contained motor, and the corresponding conversion of the message and the flow is realized.
In order to remove gas in cooling liquid in the engine, a degassing port 5 is arranged on the temperature control valve seat 1, and the degassing port 5 is communicated with an expansion tank through threaded fastening.
In order to realize the monitoring of the temperature of the cooling liquid inside the temperature control valve seat, the temperature control valve seat 1 is provided with a water temperature sensor 6, and through thread fastening, a head temperature sensing device of the water temperature sensor 6 receives water temperature information, transmits the water temperature information to an electronic component, converts the information into an electric signal and transmits the electric signal to an ECU (electronic control unit) for analyzing and sending subsequent instructions.
In order to facilitate the assembly and disassembly, the electric control flow valve 4 is integrated on the water outlet channel.
The automatically controlled flow valve be prior art, this application is no longer repeated its structure.
The engine cooling method using the double electric control flow valve comprises the following steps:
calculating the target heat dissipation Q of the engine w ；
The water inlet temperature and the water outlet temperature of the engine are collected constantly, and the ECU forms a real-time difference value delta t by calculating the difference value of the water inlet temperature and the water outlet temperature w Based on the water circulation flow q at the rotation speed Vw To form a real-time pseudo heat dissipation Q w1 ；
Referring to FIG. 4, a cooling system control flow chart is shown by comparing Q w And Q w1 Making an alignment or Δ t w The ECU constantly adjusts the opening degree of the electric control circulating valve, the opening temperature of the electric control fan, the rotating speed of the fan and the fuel injection quantity of an engine fuel injection nozzle, so that the normal work of an engine cooling system is ensured, and the specific control flow is as follows:
1) If Q w1 ＞Q w Or Δ t w > 10 ℃, trigger electric signal feedback → ECU → CAN communication signal → electric control flow valve opening (the opening degree automatically sets the step length depending on the flow valve, for example, the step length is 1 degree, 2 degree, 5 degree, etc.) → if Q CAN be satisfied w1 ≤Q w And Δ t w Closing an electric control circulation valve at the temperature of less than or equal to 10 ℃;
2) If Q w1 ＞Q w Or Δ t w And the temperature is more than 10 ℃, triggering electric signal feedback → ECU → CAN communication signal → electric control flow valve is opened (fully opened) → still: q w1 ＞Q w Or Δ t w Temperature > 10 ℃ → electronically controlled fan turn-on (automatically set step size according to fan, for example, step size of 100r/min, 200r/min, 300r/min, etc.) → if Q can be satisfied w1 ≤Q w And Δ t w ≤ 10 ℃ → electric control fan is closed → electric control flow valve is closed;
3) If Q w1 ＞Q w Or Δ t w And the temperature is more than 10 ℃, triggering electric signal feedback → ECU → CAN communication signal → electric control flow valve is opened (fully opened) → still: q w1 ＞Q w Or Δ t w Temperature > 10 ℃ → electric control fan is turned on (full rotation speed operation) → if Q can be satisfied w1 ≤Q w And Δ t w ℃ → 10 ℃ → closing of the electrically controlled fan → closing of the electrically controlled circulation valve;
4) If Q w1 ＞Q w Or Δ t w And the temperature is more than 10 ℃, triggering electric signal feedback → ECU → CAN communication signal → electric control flow valve is opened (fully opened) → still: q w1 ＞Q w Or Δ t w (> 10 ℃ → electronically controlled fan on (full speed operation) → still: q w1 ＞Q w Or Δ t w → 10 ℃ → ECU → CAN communication signal → engine fuel spray nozzle reduces fuel spray amount → engine torque limitation → engine speed reduction → if Q CAN be satisfied w1 ≤Q w And Δ t w 10 ℃ or lower → the electric control fan is closed → the electric control circulating valve is closed.
The calculated engine target heat dissipation Q w The calculation formula of (c) is:
Q w ＝(A*g e *P e *H u )/3600
in the formula: q w Is heat, unit: kJ/h; a is a proportionality coefficient which means the percentage of heat of a cooling system in heat energy of fuel, and A is a diesel engine and takes the value of 0.18-0.25; g e Is specific fuel consumption, unit: g/(kW.h); p e Effective power, unit: kW; h u Is low heating value fuel, and the unit: kJ/kg;
the water circulation flow rate q Vw The calculation formula of (c) is:
q Vw ＝q Vp *η V
in the formula: q. q.s Vw The unit is the cooling water circulation flow: m is 3 /h；η V The value is 0.6-0.85 for the volumetric efficiency of the water pump;
the real-time mimic heat dissipation Q w1 The calculation formula of (c) is:
Q w1 ＝q Vw *(△t w *ρ w *c pw )
in the formula: q w1 Is heat, unit: kJ/h; q. q.s Vw Flow, unit: m is 3 /h；△t w For the permissible temperature difference when the coolant circulates in the internal combustion engine, the unit: DEG C; rho w As coolant density, unit: kg/m 3 ；c pw The specific constant pressure heat capacity of the cooling liquid is as follows: kJ/(kg. Deg.C).
As shown in fig. 5 and 6, in order to complete the self-cleaning function of the electrically controlled circulation valve 4, the self-cleaning function is specially designed for solving the problem that foreign matters are easily accumulated in the inner cavity of the electrically controlled circulation valve 4, and the self-cleaning function is required to forcibly realize 5 opening and closing cycles on the basis of resetting the small-cycle working state, wherein the operation is the internal setting of the electrically controlled circulation valve 4, so that the self-cleaning cycle is completed every time the engine is restarted, and further, the command transmitted by the ECU is received.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are intended to be within the scope of the present invention.
Claims (3)
1. An engine cooling device applying a dual electric control flow valve is characterized in that,
the device comprises a temperature control valve seat;
two water outlet cavity channels are arranged above the temperature control valve seat in parallel, and the top ends of the two water outlet cavity channels are converged and communicated with an engine water outlet pipe; a small circulating water pipe is arranged on the side edge of the temperature control valve seat;
wherein, each water outlet cavity channel is provided with an electric control circulation valve;
during large circulation, the electric control circulation valve controls the cooling liquid to flow into the water outlet pipe of the engine;
and when the circulation is small, the electric control circulation valve controls the cooling liquid to flow into the small circulation water pipe.
2. The cooling device as claimed in claim 1, wherein the temperature-controlled valve seat is provided with a degassing port and a water temperature sensor.
3. The cooling device of claim 1, wherein the electrically controlled flow valve is integrated into the outlet channel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116771485A (en) * | 2023-08-15 | 2023-09-19 | 江苏同征新能源汽车零部件有限公司 | Automobile thermal management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116771485A (en) * | 2023-08-15 | 2023-09-19 | 江苏同征新能源汽车零部件有限公司 | Automobile thermal management system |
| CN116771485B (en) * | 2023-08-15 | 2023-11-03 | 江苏同征新能源汽车零部件有限公司 | Automobile thermal management system |
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