CN107339143B - The flow of inlet water control method of radiator in parallel - Google Patents

The flow of inlet water control method of radiator in parallel Download PDF

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Publication number
CN107339143B
CN107339143B CN201611062089.XA CN201611062089A CN107339143B CN 107339143 B CN107339143 B CN 107339143B CN 201611062089 A CN201611062089 A CN 201611062089A CN 107339143 B CN107339143 B CN 107339143B
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radiator
water flow
level
heat dissipation
follows
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CN201611062089.XA
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CN107339143A (en
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杨栋
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • 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
    • F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
    • F01P11/14—Indicating devices; Other safety devices
    • F01P11/16—Indicating devices; Other safety devices concerning coolant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/18—Arrangements or mounting of liquid-to-air heat-exchangers
    • F01P2003/182—Arrangements or mounting of liquid-to-air heat-exchangers with multiple heat-exchangers
    • 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
    • F01P2007/168—By varying the cooling capacity of a liquid-to-air heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2025/00—Measuring
    • F01P2025/60—Operating parameters
    • F01P2025/66—Vehicle speed
    • 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
    • F01P2050/00—Applications
    • F01P2050/22—Motor-cars

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention discloses a kind of flow of inlet water control methods of radiator in parallel, include the following steps: step S100, detection engine water temperature；If engine water temperature is higher than 95 DEG C, S200 is entered step；Step S200, current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than 80km/h, then according to the heat exchange amount of the heat exchange amount of level-one radiator and two-class heat dissipation device, calculates and obtain the water flow that should enter level-one radiator and the water flow for entering two-class heat dissipation device.The flow of inlet water control method of parallel connection radiator provided by the invention arranges a two-class heat dissipation device with heat radiation amount by being reserved with the position of intercooler in the case where crossbeam is installed in the lower end of level-one radiator, and control the influent flow distribution of the parallel connection radiator, while using existing space, heat dissipation effect is improved.

Description

The flow of inlet water control method of radiator in parallel
Technical field
The present invention relates to the radiator inlet flow control of engine more particularly to a kind of flow of inlet water of radiator in parallel Control method.
Background technique
When engine operation, a large amount of heat is generated, in order to enable correlated parts steady operation under high temperature and pressure, hair Motivation must distribute extra heat.The function of automobile cooling system be exactly by Heating Components absorb partial heat and When distribute, guarantee engine work under optimum state of temperature.But during automobile research, tied by front end Structure, moulding etc. easily constrain, and the matching of cooling system can not necessarily reach optimal perfect condition.Existing vehicle is about vehicle Thermal balance problem not up to standard, the rectification scheme for often comparing concentration concentrate on the following aspects: 1, increasing existing radiator ruler Very little, encryption core, heat radiation amount；2, air quantity of fan is increased, electric efficiency is promoted；3, increase front-end module flow-guiding structure, such as The components such as wind gathering plate improve hair lock pressure power, promote intake efficiency；4, pump capacity is increased.
The above is substantially some common solutions；But due to the limitation of existing boundary, some rectification schemes It is difficult to carry out or effect is bad.
Summary of the invention
It is in the prior art to solve the object of the present invention is to provide a kind of flow of inlet water control method of radiator in parallel Problem improves heat dissipation effect.
The present invention provides a kind of flow of inlet water control methods of radiator in parallel, wherein includes the following steps:
Step S100, engine water temperature is detected；If engine water temperature is higher than 95 DEG C, S200 is entered step；
Step S200, current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than 80km/h, according to level-one The heat exchange amount of radiator and the heat exchange amount of two-class heat dissipation device, calculate obtain should enter level-one radiator water flow and enter two The water flow of grade radiator.
The flow of inlet water control method of parallel connection radiator as described above, wherein preferably, step S200 includes:
Current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than or equal to 10km/h, control is dissipated into level-one The water flow of hot device are as follows: LV1=(Q1/ (Q1+Q2)+7Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device Are as follows: LV2=(Q2/8 (Q1+Q2)) * LV；
If current vehicle speed is greater than 10km/h and to be less than or equal to 20km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+6Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(2Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 20km/h and to be less than or equal to 30km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+5Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(3Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 30km/h and to be less than or equal to 40km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+4Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(4Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 40km/h and to be less than or equal to 50km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+3Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(5Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 50km/h and to be less than or equal to 60km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+2Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(6Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 60km/h and to be less than or equal to 70km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(7Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 70km/h and to be less than or equal to 80km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV；
Wherein, LVFor total flow of intaking, LV1For the water flow for entering level-one radiator, LV2For the water for entering two-class heat dissipation device Flow, Q1 are the heat exchange amount of level-one radiator, and Q2 is the heat exchange amount of two-class heat dissipation device.
The flow of inlet water control method of parallel connection radiator as described above, wherein preferably, further includes:
If step S300, current vehicle speed is greater than 80km/h, control enters the water flow of level-one radiator are as follows: LV1= (Q1/(Q1+Q2))*LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV。
The flow of inlet water control method of two-stage as described above, wherein preferably, after step S300, further includes:
If step S400, current vehicle speed is 0km/h, control enters the water flow of level-one radiator are as follows: LV1=LV；And it controls The water flow that system enters two-class heat dissipation device is 0.
The flow of inlet water control method of parallel connection radiator as described above, wherein preferably, in step S100, if Engine water temperature is lower than 95 DEG C, then enters step S500:
Step S500, electronic thermostat is closed, control enters the water flow of level-one radiator and enters two-class heat dissipation device Water flow is 0.
The flow of inlet water control method of parallel connection radiator provided by the invention is horizontal by installing in the lower end of level-one radiator It is reserved with position one two-class heat dissipation device of arrangement of intercooler under beam with heat radiation amount, and controls the parallel connection radiator Influent flow distribution improves heat dissipation effect while using existing space.
Detailed description of the invention
Fig. 1 is the flow of inlet water control method flow chart of radiator in parallel provided in an embodiment of the present invention；
Fig. 2 is the cooling principle figure of radiator in parallel.
Description of symbols:
The automatically controlled flow divider valve 5- electronic thermostat 6- water inlet 7- second level of 1- fan 2- level-one radiator 3- water inlet 4- Radiator 8- water outlet 9- water outlet
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Fig. 1 is the flow of inlet water control method flow chart of radiator in parallel provided in an embodiment of the present invention, and Fig. 2 is in parallel dissipates The cooling principle figure of hot device.
The embodiment of the invention provides a kind of flow of inlet water control method of radiator in parallel, parallel connection radiator knot therein Structure and the course of work are referring to figure 2., it is contemplated that the MPV vehicle front end arrangement design feature, existing level-one radiator 2 can Cooled down under the action of fan 1, lower end installation crossbeam under be reserved with intercooler (in order to engine with supercharger vehicle consideration, Air-cooled type) position, just can use the spatial position and rearrange a two-class heat dissipation device 7 with heat radiation amount, But due to the constraint of front-end architecture, the two-class heat dissipation device 7 at this cannot be in the coverage area of fan 1.
Specifically, radiator in parallel is made of level-one radiator 2 and two-class heat dissipation device 7, level-one radiator 2 and two-class heat dissipation Water route flow direction between device 7 is parallel arrangement.Water inlet is arranged in the top of radiator water chamber, the water outlet arrangement of radiator In the lower position of radiator water chamber, to guarantee optimal heat transfer effect.As shown in Fig. 2, 3 cloth of water inlet of level-one radiator 2 It sets on the top of the water chamber of level-one radiator 3, the water outlet 9 of level-one radiator 2 is arranged under the water chamber of level-one radiator 2 Portion.The water inlet 6 of two-class heat dissipation device 7 is arranged in the top of the water chamber of two-class heat dissipation device 7, and the water outlet 8 of two-class heat dissipation device 7 is arranged In the lower part of the water chamber of two-class heat dissipation device 7.It is wherein all covered behind level-one radiator 2 by fan 1, fan 1 sets for air draught type Meter, two-class heat dissipation device 7 only rely on speed air quantity and are cooled down.Such arrangement can largely increase original heat dissipation The heat dissipation capacity (because increasing a two-class heat dissipation device) of device.But due under different speeds, the variation of speed air quantity, air quantity with Speed changes difference, level-one radiator and the two-class heat dissipation device of engine water flow under the variation of its influence, different speeds Between heat exchange amount factors, the distribution control method of flow such as difference it is very crucial.By being arranged in the position of total water inlet Automatically controlled flow divider valve 4 and electronic thermostat 5 distribute come the inflow to level-one radiator and two-class heat dissipation device to be controlled.
The flow of inlet water control method of parallel connection radiator provided in an embodiment of the present invention, comprising the following steps:
Step S100, engine water temperature is detected；If engine water temperature is higher than 95 DEG C, S200 is entered step.
It will be appreciated by persons skilled in the art that in the step s 100, if engine water temperature is lower than 95 DEG C, entering Step S500.
Step S500, electronic thermostat is closed, control enters the water flow of level-one radiator and enters two-class heat dissipation device Water flow is 0.
Step S200, current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than 80km/h, according to level-one The heat exchange amount of radiator and the heat exchange amount of two-class heat dissipation device, calculate obtain should enter level-one radiator water flow and enter two The water flow of grade radiator.
Those skilled in the art should also be understood that this method can also include:
If step S400, current vehicle speed is 0km/h, control enters the water flow of level-one radiator are as follows: LV1=LV；And it controls The water flow that system enters two-class heat dissipation device is 0.Wherein, LVFor total flow of intaking, LV1For the water flow for entering level-one radiator.
If current vehicle speed is 0km/h, vehicle is in idling mode, and no matter engine water temperature is how many, and coolant liquid is complete Part is fitted on level-one radiator.Because speed air quantity at this time is zero, two-class heat dissipation device only leans on nature heat radiation cooling, basic to rise Less than effect, and level-one radiator can carry out pressure cooling by fan at this time.
Step S200 can with specifically includes the following steps:
Current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than or equal to 10km/h, control is dissipated into level-one The water flow of hot device are as follows: LV1=(Q1/ (Q1+Q2)+7Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device Are as follows: LV2=(Q2/8 (Q1+Q2)) * LV；
If current vehicle speed is greater than 10km/h and to be less than or equal to 20km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+6Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(2Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 20km/h and to be less than or equal to 30km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+5Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(3Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 30km/h and to be less than or equal to 40km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+4Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(4Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 40km/h and to be less than or equal to 50km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+3Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(5Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 50km/h and to be less than or equal to 60km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+2Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(6Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 60km/h and to be less than or equal to 70km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)+Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(7Q2/8 (Q1+Q2))*LV；
If current vehicle speed is greater than 70km/h and to be less than or equal to 80km/h, control enters the water flow of level-one radiator Are as follows: LV1=(Q1/ (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV；
Wherein, LVFor total flow of intaking, LV1For the water flow for entering level-one radiator, LV2For the water for entering two-class heat dissipation device Flow, Q1 and Q2 are constants, and Q1 is the heat exchange amount of level-one radiator, and Q2 is the heat exchange amount of two-class heat dissipation device.
Above-mentioned steps are making to cooling system according to speed air quantity and air quantity of fan, it is preferred that the party If method further includes step S300, current vehicle speed for greater than 80km/h, control enters the water flow of level-one radiator are as follows: LV1= (Q1/(Q1+Q2))*LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV.At this point, speed More than 80km/h, for can almost ignore for speed air quantity, speed air quantity plays a major role the air quantity of fan.
Structure, feature and effect of the invention, the above institute are described in detail based on the embodiments shown in the drawings Only presently preferred embodiments of the present invention is stated, but the present invention does not limit the scope of implementation as shown in the drawings, it is all according to structure of the invention Think made change or equivalent example modified to equivalent change, when not going beyond the spirit of the description and the drawings, It should all be within the scope of the present invention.

Claims (5)

1. a kind of flow of inlet water control method of parallel connection radiator, which comprises the steps of:
Step S100, engine water temperature is detected；If engine water temperature is higher than 95 DEG C, S200 is entered step；
Step S200, current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than 80km/h, is radiated according to level-one The heat exchange amount of device and the heat exchange amount of two-class heat dissipation device calculate and obtain the water flow that should enter level-one radiator and dissipate into second level The water flow of hot device；
Wherein, the level-one radiator and the two-class heat dissipation device are arranged in parallel, wherein work of the level-one radiator in fan It is cooled down under, the two-class heat dissipation device is not in fan coverage area.
2. the flow of inlet water control method of parallel connection radiator according to claim 1, which is characterized in that step S200 packet It includes:
Current vehicle speed is detected, if current vehicle speed is greater than 0km/h and to be less than or equal to 10km/h, control enters level-one radiator Water flow are as follows: LV1=(Q1/ (Q1+Q2)+7Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2 =(Q2/8 (Q1+Q2)) * LV；
If current vehicle speed is greater than 10km/h and to be less than or equal to 20km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+6Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(2Q2/8 (Q1 +Q2))*LV；
If current vehicle speed is greater than 20km/h and to be less than or equal to 30km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+5Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(3Q2/8 (Q1 +Q2))*LV；
If current vehicle speed is greater than 30km/h and to be less than or equal to 40km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+4Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(4Q2/8 (Q1 +Q2))*LV；
If current vehicle speed is greater than 40km/h and to be less than or equal to 50km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+3Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(5Q2/8 (Q1 +Q2))*LV；
If current vehicle speed is greater than 50km/h and to be less than or equal to 60km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+2Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(6Q2/8 (Q1 +Q2))*LV；
If current vehicle speed is greater than 60km/h and to be less than or equal to 70km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)+Q2/8 (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(7Q2/8 (Q1+ Q2))*LV；
If current vehicle speed is greater than 70km/h and to be less than or equal to 80km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2)) * LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV；
Wherein, LVFor total flow of intaking, LV1For the water flow for entering level-one radiator, LV2For the water flow for entering two-class heat dissipation device Amount, Q1 are the heat exchange amount of level-one radiator, and Q2 is the heat exchange amount of two-class heat dissipation device.
3. it is according to claim 2 parallel connection radiator flow of inlet water control method, which is characterized in that step S200 it Afterwards, further includes:
If step S300, current vehicle speed is greater than 80km/h, control enters the water flow of level-one radiator are as follows: LV1=(Q1/ (Q1+Q2))*LV；And control the water flow into two-class heat dissipation device are as follows: LV2=(Q2/ (Q1+Q2)) * LV。
4. the flow of inlet water control method of parallel connection radiator according to claim 3, which is characterized in that further include:
If step S400, current vehicle speed is 0km/h, control enters the water flow of level-one radiator are as follows: LV1=LV；And control into The water flow for entering two-class heat dissipation device is 0.
5. the flow of inlet water control method of parallel connection radiator according to claim 1-4, which is characterized in that step In S100, if engine water temperature is lower than 95 DEG C, S500 is entered step:
Step S500, electronic thermostat is closed, control enters the water flow of level-one radiator and enters the water flow of two-class heat dissipation device Amount is 0.
CN201611062089.XA 2016-11-25 2016-11-25 The flow of inlet water control method of radiator in parallel Expired - Fee Related CN107339143B (en)

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