KR20130007819A - Cooling apparatus and cooling methoed for power-pack in hybrid vehicle - Google Patents

Cooling apparatus and cooling methoed for power-pack in hybrid vehicle Download PDF

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Publication number
KR20130007819A
KR20130007819A KR1020110068391A KR20110068391A KR20130007819A KR 20130007819 A KR20130007819 A KR 20130007819A KR 1020110068391 A KR1020110068391 A KR 1020110068391A KR 20110068391 A KR20110068391 A KR 20110068391A KR 20130007819 A KR20130007819 A KR 20130007819A
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KR
South Korea
Prior art keywords
power pack
temperature
cooling
water pump
driving
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Application number
KR1020110068391A
Other languages
Korean (ko)
Inventor
이준용
안치경
김대광
정민영
Original Assignee
현대자동차주식회사
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Priority to KR1020110068391A priority Critical patent/KR20130007819A/en
Publication of KR20130007819A publication Critical patent/KR20130007819A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00Control systems specially adapted for hybrid vehicles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K11/00Arrangement in connection with cooling of propulsion units
    • B60K11/02Arrangement in connection with cooling of propulsion units with liquid cooling
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00Supplying electric power to auxiliary equipment of vehicles
    • B60L1/003Supplying electric power to auxiliary equipment of vehicles to auxiliary motors, e.g. for pumps, compressors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00Supplying electric power to auxiliary equipment of vehicles
    • B60L1/02Supplying electric power to auxiliary equipment of vehicles to electric heating circuits
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60WCONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/18Propelling the vehicle
    • B60W30/184Preventing damage resulting from overload or excessive wear of the driveline
    • B60W30/1843Overheating of driveline components
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00Liquid cooling
    • F01P3/20Cooling circuits not specific to a single part of engine or machine
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/165Controlling of coolant flow the coolant being liquid by thermostatic control characterised by systems with two or more loops
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P7/00Controlling of coolant flow
    • F01P7/14Controlling of coolant flow the coolant being liquid
    • F01P7/16Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/167Controlling of coolant flow the coolant being liquid by thermostatic control by adjusting the pre-set temperature according to engine parameters, e.g. engine load, engine speed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/10Vehicle control parameters
    • B60L2240/36Temperature of vehicle components or parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00Control parameters of input or output; Target parameters
    • B60L2240/40Drive Train control parameters
    • B60L2240/42Drive Train control parameters related to electric machines
    • B60L2240/425Temperature
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01PCOOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00Applications
    • F01P2050/24Hybrid vehicles
    • Y02T10/642

Abstract

PURPOSE: An apparatus and a method for cooling a power pack for a hybrid vehicle are provided to increase the degree of design freedom by lowering the element allowable temperature of a power pack. CONSTITUTION: An apparatus for cooling a power pack for a hybrid vehicle comprises a power pack(21), a low temperature radiator(22), an electric water pump(23), and a cooling fan(24). The power pack obtains the driving information of a vehicle to control the operation of an engine(11) and a motor. The low temperature radiator is connected to the power pack and a cooling water path to radiate the cooling water discharged from the power pack. The low temperature radiator is arranged in parallel to a radiator(12). The electric water pump is arranged in the cooling water path and is driven by electric signals outputted from an ECU(25). The electric water pump circulates the power pack and the low temperature radiator. The cooling fan is controlled by the ECU so that the outdoor air can flow into the low temperature radiator. [Reference numerals] (11) Engine; (12) Radiator; (14) Thermostat; (15) Heater; (16) Valve; (21) Power pack; (22) Low temperature radiator; (24) Cooling fan

Description

Cooling apparatus and cooling method for hybrid vehicle power packs {Cooling apparatus and cooling methoed for power-pack in hybrid vehicle}

The present invention relates to a cooling apparatus of a hybrid vehicle, and more particularly, to a cooling apparatus and a cooling method of a power pack for a hybrid vehicle to enable the cooling of the power pack for controlling energy in the hybrid vehicle.

High fuel efficiency and eco-friendliness have emerged as a major issue in the automotive industry, and hybrid cars that use engines and motors as driving sources of automobiles are in the spotlight.

In order to control the driving of the engine and the motor, the hybrid vehicle is provided with a power pack which is a separate control device, and the power pack determines driving of the engine and the motor by acquiring driving information of the vehicle.

Since the power pack generates heat according to the operation, it is necessary to cool the generated heat so that the power pack can be continuously operated without being damaged.

In particular, mild hybrid vehicles, which are highly dependent on the engine, use engine coolant to cool the power pack.

Looking at the cooling device of the hybrid vehicle power pack according to the prior art as shown in Figure 1, by using a mechanical water pump 113 while controlling the cooling water between the engine 111 and the radiator 112 with a thermostat 114 Circulated, and a portion of the coolant from the engine 111 is circulated through the heater 115 and the valve 116 to the normal engine cooling device used for cooling the room, and at the outlet side of the radiator 112. Branching the flow path and the electric water pump 123 is configured to circulate the cooling water power pack 121. In addition, a part of the cooling water from the engine 111 is controlled by the valve furnace 116 and circulated by the heater 115 to be used for heating the room.

However, in the cooling device of the power pack for a hybrid vehicle according to the prior art as described above, since the coolant from the radiator 112 is directly circulated to the power pack 121, the cooling performance is lowered, the operation of the electric water pump 123 Therefore, there is a big problem of energy loss. Cooling water from the radiator 112 is relatively low temperature than the cooling water from the engine 111, but is still high temperature, so it is much unsuitable for use in cooling to lower the cooling performance. For example, it can be seen that the cooling water temperature of the power pack 121 is controlled at 95 to 100 ° C. under the heavy load or higher condition, thereby significantly reducing the cooling performance.

 In addition, since the electric water pump 123 must be driven at all times, this causes a lot of energy loss.

In addition, due to the above problems, many restrictions occur in the operating area of the hybrid vehicle.

The present invention has been invented to solve the above problems, and an object of the present invention is to provide a cooling apparatus and a cooling method of a power pack for a hybrid vehicle to independently control and efficiently control the power pack of a hybrid vehicle.

In the hybrid vehicle power pack cooling apparatus according to the present invention having the configuration as described above, in a hybrid vehicle in which the engine and the radiator are connected to the coolant to circulate the coolant, the driving information of the vehicle is acquired to control the operation of the engine and the motor. And a low-temperature radiator connected to the power pack and the cooling water path to radiate the cooling water discharged from the power pack and arranged in parallel with the radiator, and driven by an electrical signal provided on the cooling water path and output from the ECU. It characterized in that it comprises an electric water pump for circulating the power pack and low temperature radiator.

Preferably, a cooling fan controlled by the ECU may be further provided to allow the outside air to flow into the low temperature radiator.

Here, the cooling fan is controlled by selectively applying a PWM control for controlling the rotational speed of the cooling fan or an on / off control for controlling the operation of the cooling fan by reflecting the temperature and the vehicle speed of the power pack.

In addition, the low temperature radiator is arranged to be located in front of the vehicle than the radiator.

In addition, the electric water pump is controlled to determine the rotation speed by the temperature of the power pack.

On the other hand, in the cooling method of the power pack for a hybrid vehicle for controlling the power pack cooling device as described above, the power pack for acquiring the driving information of the hybrid vehicle to control the operation of the engine and the motor is connected to the cooling water connecting the power pack and the low temperature radiator. A water pump driving start determination step of determining whether or not the electric water pump provided at the first temperature is set to start driving; and when the temperature of the power pack exceeds the first temperature in the water pump driving start determination step, the cooling water and the power pack A water pump driving step of driving the electric water pump to circulate the low temperature radiator; and an engine driving determination step of determining whether the engine of the hybrid vehicle is operating and performing the water pump driving start determination step again when the engine is in operation. .

After the water pump driving start determination step, a cooling fan driving start determination step of determining whether a temperature of a power pack is higher than or equal to a second temperature set higher than the first temperature to drive a cooling fan is performed, and the cooling fan driving start determination is performed. When the temperature of the power pack exceeds the second temperature in the step, the cooling fan operating step of driving the cooling fan is characterized in that it is performed.

Here, in the cooling fan operation step, a PWM control for controlling the rotational speed of the cooling fan or an on / off control for controlling the operation of the cooling fan is selectively applied by reflecting the temperature and the vehicle speed of the power pack.

Before the water pump driving start determination step is performed, a water pump checking step for determining whether there is an abnormality of the electric water pump is performed, and if the electric water pump is normal in the water pump checking step, the water pump driving start determining step Is preferably performed.

In addition, when the electric water pump is not normal in the water pump check step, a safety mode entry determination step of determining whether the temperature of the power pack exceeds the first temperature is performed, and the temperature of the power pack is set in the safety mode entry determination step. If the temperature exceeds 1, a safe mode operation step for operating the power pack in a safe mode is performed. If the temperature of the power pack is less than the first temperature in the safe mode entry determination step, a normal mode operation step for operating the power pack in a normal mode is performed. To be performed.

In addition, the warp pump driving step is characterized in that the control to determine the rotation speed of the electric water pump by the temperature of the power pack.

According to the cooling device and the cooling method of the hybrid vehicle power pack according to the present invention having the above configuration, the main radiator for cooling the cooling water from the engine and the sub-radiator for exclusively cooling the power pack are separated, independently of the low temperature cooling water By circulating the cooling performance can be improved.

In addition, as the water temperature of the coolant circulating in the power pack decreases significantly, the efficiency of the power pack increases, and it is possible to operate in a high temperature region, thereby expanding the area in which the hybrid vehicle can be operated, and designing a low temperature allowable element inside the power pack. As a result, the degree of freedom in design is increased.

1 is a conceptual diagram showing a cooling device of a power pack for a hybrid vehicle according to the prior art,
2 is a conceptual diagram showing a cooling device of a power pack for a hybrid vehicle according to the present invention;
Figure 3 is a flow chart illustrating a cooling method of a power pack for a hybrid vehicle according to the present invention.

Hereinafter, a cooling apparatus of a power pack for a hybrid vehicle according to the present invention will be described in detail with reference to the accompanying drawings.

The cooling device of the power pack for a hybrid vehicle according to the present invention is provided independently of the cooling device of a conventional engine circulated between the engine 11 and the radiator 12 by a mechanical water pump 13.

That is, the cooling device of the power pack for a hybrid vehicle according to the present invention, as shown in Figure 2, the low-temperature radiator 22 is connected to the power pack 21, the power pack 21 and the cooling water to radiate heat of the cooling water 22 And an electric water pump 23 provided on the cooling water path between the power pack 21 and the low temperature radiator 22 to circulate the cooling water.

The power pack 21 is a component of the hybrid vehicle for controlling the energy required for driving the engine and the motor in the hybrid vehicle. The power pack 21 is heated according to the driving of the vehicle, and if the heat is generated above a predetermined temperature, the components inside the power pack 21 may be damaged and the efficiency may be lowered. Therefore, the power pack 21 should be cooled below a predetermined temperature.

The low temperature radiator 22 is connected to the power pack 21 through a cooling water and constitutes a circuit in which cooling water can circulate with the power pack 21 and the low temperature radiator 22. Here, the low-temperature radiator 22 is referred to as a low-temperature radiator 22 because the low-temperature radiator 22 enters and radiates a temperature lower than that of a normal radiator 12 that radiates the coolant that cools the engine 11. The low temperature radiator 22 has a smaller capacity than the radiator 12, and is preferably parallel to the radiator 12 but positioned forward of the radiator 12. This is because the temperature of the cooling water passing through the inside of the low-temperature radiator 22 is lower than the temperature of the cooling water passing through the radiator 12 so as to contact the outside air first. If the radiator 12 is located in front of the radiator 12, since the outside air is heated by the contact with the radiator 12, the low temperature radiator 22 is brought forward in front of the radiator 12 because the low temperature radiator 22 is degraded by contacting the low temperature radiator 22. Preferably located.

The electric water pump 23 is provided on the cooling water path connecting the power pack 21 and the low temperature radiator 22. The electric water pump 23 operates by an electrical signal, and operates when an operation signal is applied from the outside, thereby circulating the cooling water.

Here, in order to promote heat dissipation of the radiator 12 and the low temperature radiator 22, it is preferable that a cooling fan 24 is further provided. When the cooling fan 24 is unable to cool the cooling water only by circulation of the cooling water passing through the low temperature radiator 22, when the cooling demand is large, such as when the vehicle is running at a low speed, the outside air is supplied to the low temperature radiator 22. Inlet to promote cooling of the cooling water.

In addition, the electric water pump 23 and the cooling fan 24 are controlled by an electronic control unit (ECU). The ECU 25 receives temperature information from the power pack 21 (a), determines whether the electric water pump 23 or the cooling fan 24 is operated, and the electric water pump 23 or the cooling fan 24 is determined. (B) and (c). For example, when the temperature of the power pack 21 is input, the ECU 25 determines the rotation speed of the electric water pump 23 corresponding to the temperature of the power pack 21, and sets a voltage control amount corresponding to the rotation speed to CAN (Controller). Control signals are output using protocols such as Area Network) and LIN (Local Interconnect Network).

In addition, when the ECU 25 controls the cooling fan 24, the voltage control amount required to drive the cooling fan 24 in consideration of the vehicle speed together with the temperature of the power pack 21 is determined to determine the PWM (Pulse Width Modulation). The cooling fan 24 is controlled by modulation) control or on / off control. That is, the voltage control amount is determined on the table reflecting the temperature of the power pack 21 and the vehicle speed, and PWM control or On / Off control is selectively applied to the voltage control amount. By controlling the speed of the motor driving the cooling fan 24 through the PWM control to control the amount of air flowing through the cooling fan 24, or whenever the cooling fan 24 is required to operate through the On / Off control It can work.

Reference numerals 15 and 16 are heaters and valves for use in indoor heating by using the heat of the coolant of the engine 11.

On the other hand, the cooling method of the power pack for a hybrid vehicle according to the present invention is as follows.

In the method of cooling a power pack for a hybrid vehicle according to the present invention, as shown in FIG. 3, the water pump is configured to determine whether the temperature of the coolant exceeds the first temperature T1 set to start the electric water pump 23. When the temperature of the power pack exceeds the first temperature (T1) in the start determination step (S120) and the water pump driving start determination step (S120), the water pump driving step (S130) for driving the electric water pump 23 and The engine driving determination step S160 is performed to determine whether the engine 11 of the hybrid vehicle operates and to perform the water pump driving start determination step S120 again when the engine 11 is in operation.

The water pump driving start determination step (S120) determines whether the temperature of the coolant circulating in the power pack 21 and the low temperature radiator 22 exceeds the first temperature T1 set so that the electric water pump 23 starts to operate. . If the first temperature T1 is exceeded, the electric water pump 23 is driven to circulate the cooling water in the power pack 21 and the low temperature radiator 22 to cool the generated power pack 21. When the electric water pump 23 circulates, while the coolant circulates between the power pack 21 and the low temperature radiator 22, the coolant absorbs heat from the power pack 21 to radiate heat from the low temperature radiator 22. The power pack 21 may maintain an appropriate temperature.

On the other hand, if the temperature of the power pack 21 is lower than or equal to the first temperature T1, the electric water pump 23 is not driven. Because the power pack 21 is most efficient when operating in the proper temperature range, if the power pack 21 is less than the first temperature (T1), the electric water pump until the power pack 21 reaches the proper temperature (23) is not driven.

In addition, before the water pump driving start determination step S120 is performed, it is preferable that the water pump checking step S110 is performed to determine whether the electric water pump 23 is normal. For example, by detecting the disconnection and short circuit of the control signal line electrically connecting the ECU 25 and the electric water pump 23, it is checked whether the ECU 25 can normally control the electric water pump 23. Only when it is determined that the electric water pump 23 is normal in the water pump checking step (S110), the water pump driving step (S130) to be described later is performed.

In the water pump driving step S130, when the temperature of the power pack 21 exceeds the first temperature T1, the electric water pump 23 operates to circulate the cooling water between the power pack 21 and the low temperature radiator 22. . When the coolant circulates through the power pack 21 and the low temperature radiator 22, the coolant absorbs heat from the power pack 21 to radiate heat from the low temperature radiator 22 to the outside so that the power pack 21 maintains an appropriate temperature.

The engine driving determination step S160 determines whether the engine 11 is driven, feeds back the water pump driving start determination step S120 when the engine 11 is being driven, and ends the driving of the engine 11. If so, control ends.

On the other hand, if the temperature of the power pack 21 is equal to or higher than the set temperature, it is difficult to cool the power pack 21 only by circulating the power pack 21 and the low temperature radiator 22 by the electric water pump 23. By operating (24) to promote cooling, for this, a cooling fan driving start determination step (S140) and a cooling fan operation step (S150) for driving the cooling fan 24 are performed.

The cooling fan driving start determination step (S140) determines whether the temperature of the power pack 21 exceeds the set second temperature T2. The second temperature T2 is a temperature set higher than the first temperature T1, and is a judgment basis for additionally operating the cooling fan 24 when the power pack 21 cannot be sufficiently cooled by simple circulation of cooling water. Used.

In the cooling fan operating step S150, when the temperature of the power pack 21 exceeds the second temperature T2 in the cooling fan driving start determination step S140, the cooling fan 24 is further driven. If the power pack 21 exceeds the second temperature T2, the cooling pack 24 is further operated in the state where the electric water pump 23 is operating since the first temperature T1 is naturally exceeded. When the cooling fan 24 is operated, outdoor air is introduced into the low temperature radiator 22, thereby increasing the heat dissipation performance of the low temperature radiator 22 to improve the cooling performance of the power pack 21. In addition, the cooling fan 24 may operate when the vehicle is low speed, even when the amount of outside air flowing into the low-temperature radiator 22 decreases, and the variable controlling the cooling fan 24 may be a temperature of a power pack. And the speed of the vehicle.

On the other hand, if it is determined that the electric water pump 23 is abnormal in the water pump check step (S110), the safety mode incorporation determination step (S170) to determine whether the temperature of the power pack 21 exceeds the first temperature (T1). ) Is performed.

If the temperature of the power pack 21 is less than or equal to the first temperature T1 in the safety mode entry determination step (S170), since the power pack 21 does not need to be cooled, the power pack that does not drive the electric water pump 23 is normal. The mode operation step S172 is entered.

On the other hand, if the temperature of the power pack 21 exceeds the first temperature (T1) in the safe mode entry determination step (S170), by using the electric water pump 23 so as not to overpower the power pack 21 in a certain range. The cooling water is circulated, or to operate the cooling fan 24 (S171).

11: engine 12: radiator
13: mechanical water pump 14: thermostat
15 heater 16 valve
21: power pack 22: low temperature radiator
23: electric water pump 24: cooling fan
25: ECU

Claims (11)

  1. In a hybrid vehicle that connects the engine and the radiator to the coolant to circulate the coolant,
    A power pack that acquires driving information of the vehicle and controls the operation of the engine and the motor;
    A low temperature radiator connected to the power pack and a cooling water to dissipate the cooling water discharged from the power pack and arranged in parallel with the radiator;
    And an electric water pump provided on the cooling water path and driven by an electrical signal output from the ECU to circulate the power pack and the low temperature radiator.
  2. The method of claim 1,
    Cooling device of the power pack for a hybrid vehicle, characterized in that the cooling fan is further controlled by the ECU so as to introduce the outside air into the low-temperature radiator.
  3. The method of claim 2,
    The cooling fan is controlled by applying a PWM control for controlling the rotational speed of the cooling fan or an on / off control for controlling the operation of the cooling fan to reflect the temperature and the vehicle speed of the power pack is selectively applied and controlled Cooling device for vehicle power packs.
  4. The method of claim 1,
    The low temperature radiator is a cooling device for a hybrid vehicle power pack, characterized in that arranged to be located in front of the vehicle than the radiator.
  5. The method of claim 1,
    The electric water pump is a cooling device of a power pack for a hybrid vehicle, characterized in that controlled to be determined by the temperature of the power pack.
  6. Water to determine whether the power pack for acquiring driving information of the hybrid vehicle and controlling the operation of the engine and the motor is equal to or greater than a first temperature set to start the driving of the electric water pump provided on the cooling water path connecting the power pack and the low temperature radiator. A pump driving start determination step,
    A water pump driving step of driving the electric water pump to circulate the power pack and the low temperature radiator when the temperature of the power pack exceeds a first temperature in the water pump driving start determination step;
    And an engine driving determination step of determining whether the engine of the hybrid vehicle operates and performing the water pump driving start determination step again when the engine is in operation.
  7. The method according to claim 6,
    After the water pump driving start determination step, a cooling fan driving start determination step of determining whether the temperature of the power pack is higher than or equal to the second temperature set higher than the first temperature for driving the cooling fan is performed.
    And a cooling fan operating step of driving the cooling fan when the temperature of the power pack exceeds a second temperature in the cooling fan driving start determination step.
  8. The method of claim 7, wherein
    In the cooling fan operation step, the hybrid control, characterized in that the PWM control to control the rotational speed of the cooling fan or the on / off control to control the operation of the cooling fan is selectively applied to reflect the temperature and the vehicle speed of the power pack Cooling method of vehicle power pack.
  9. The method according to claim 6,
    Before the water pump driving start determination step is performed, a water pump checking step of determining whether the electric water pump is abnormal is performed,
    And if the electric water pump is normal in the water pump checking step, the water pump driving start determination step is performed.
  10. 10. The method of claim 9,
    If the electric water pump is not normal in the water pump check step, a safety mode entry determination step of determining whether the temperature of the power pack exceeds the first temperature is performed,
    If the temperature of the power pack exceeds the first temperature in the safety mode entry determination step, a safe mode operation step for operating the power pack in a safe mode is performed,
    And a normal mode driving step for operating the power pack in a normal mode when the temperature of the power pack is less than or equal to the first temperature in the safe mode entry determination step.
  11. The method according to claim 6,
    In the step of driving the warp pump, the cooling method of the power pack for a hybrid vehicle, characterized in that the control of the rotation speed of the electric water pump is determined by the temperature of the power pack.
KR1020110068391A 2011-07-11 2011-07-11 Cooling apparatus and cooling methoed for power-pack in hybrid vehicle KR20130007819A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110068391A KR20130007819A (en) 2011-07-11 2011-07-11 Cooling apparatus and cooling methoed for power-pack in hybrid vehicle

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020110068391A KR20130007819A (en) 2011-07-11 2011-07-11 Cooling apparatus and cooling methoed for power-pack in hybrid vehicle
US13/281,122 US20130014911A1 (en) 2011-07-11 2011-10-25 Cooling apparatus and cooling method for power-pack in hybrid vehicle
DE102011054993A DE102011054993A1 (en) 2011-07-11 2011-11-02 Device and method for cooling a drive unit in a hybrid vehicle
CN201110351944XA CN102874098A (en) 2011-07-11 2011-11-09 Cooling apparatus and cooling method for power-pack in hybrid vehicle

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