KR20160057517A - Heat management system for hybrid vehicles - Google Patents

Heat management system for hybrid vehicles Download PDF

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Publication number
KR20160057517A
KR20160057517A KR1020140157866A KR20140157866A KR20160057517A KR 20160057517 A KR20160057517 A KR 20160057517A KR 1020140157866 A KR1020140157866 A KR 1020140157866A KR 20140157866 A KR20140157866 A KR 20140157866A KR 20160057517 A KR20160057517 A KR 20160057517A
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KR
South Korea
Prior art keywords
engine
cooling water
control valve
heater
circulation channel
Prior art date
Application number
KR1020140157866A
Other languages
Korean (ko)
Inventor
김용철
김재학
Original Assignee
현대자동차주식회사
기아자동차주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by 현대자동차주식회사, 기아자동차주식회사 filed Critical 현대자동차주식회사
Priority to KR1020140157866A priority Critical patent/KR20160057517A/en
Publication of KR20160057517A publication Critical patent/KR20160057517A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/04—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant
    • B60H1/08—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant from cooling liquid of the plant from other radiator than main radiator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K11/00—Arrangement in connection with cooling of propulsion units
    • B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
    • B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT 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
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • 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

Abstract

The present invention relates to a heat management system for a hybrid vehicle that improves fuel economy by delaying the engine driving time by appropriately managing the cooling water temperature by distinguishing between when the heating is required and when it is not required.
To this end, the present invention relates to a control valve for controlling a direction of a cooling water flowing in an engine, Exhaust heat exchanging means provided on the first circulation flow passage branched to one side of the direction control valve and circulating to the engine; A heater core provided on the second circulation flow path branched to the other side of the direction control valve and circulating to the engine; And a controller for controlling the direction control valve so as to determine whether the heater is operated and to cool the cooling water to the first circulation channel when the heater is not operated and to prevent the cooling water from circulating through the second circulation channel, The system is introduced.

Description

[0001] HEAT MANAGEMENT SYSTEM FOR HYBRID VEHICLES [0002]

The present invention relates to a heat management system for a hybrid vehicle, and more particularly, to a heat management system for a hybrid vehicle that improves fuel efficiency by delaying the engine driving time by appropriately managing the cooling water temperature by distinguishing between when the heater is required and when it is not needed .

The most important factor in terms of merchantability of a hybrid vehicle is fuel economy. In order to improve fuel economy, it is important to increase the running time by the battery rather than the engine.

However, in the case of the present hybrid vehicle, when the engine is restarted for improving the heater performance, there is a problem that the fuel consumption is increased and the fuel efficiency is lowered.

That is, if the performance of the heater is maintained by circulating the cooling water with the electric water pump and the heater performance is unsatisfactory, the heater performance is ensured by driving the engine. In such a structure, the cooling water warming means raised by the engine heat It is not provided separately, and the fuel efficiency is deteriorated due to frequent engine driving.

FIG. 1 schematically shows a cooling water circulation circuit of a conventional hybrid vehicle for solving the above-mentioned problem. The exhaust heat recovery device is applied on a flow path through which cooling water circulates, thereby increasing the cooling water temperature.

However, although the above-described structure can improve the fuel efficiency through the engine preheating effect using the exhaust heat, the securing of the heater performance, and the delay effect of the engine driving, there is no technology for achieving the additional fuel efficiency improvement effect by efficiently controlling the same In fact.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

JP 2008-230422 A

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to provide a hybrid vehicle heat management system which improves fuel economy by delaying the engine driving time by appropriately managing the cooling water temperature, System.

According to an aspect of the present invention, there is provided a fuel cell system including: a direction control valve for branching cooling water flowing in an engine; Exhaust heat exchanging means provided on the first circulation flow passage branched to one side of the direction control valve and circulating to the engine; A heater core provided on the second circulation flow path branched to the other side of the direction control valve and circulating to the engine; And a control unit for determining whether or not the heater is operated and controlling the direction control valve so that the cooling water is circulated in the first circulation channel when the heater is not operated and the cooling water is not circulated in the second circulation channel have.

The exhaust heat exchanging means may be disposed at a front end or a rear end of the direction control valve with respect to the first circulation flow passage.

The exhaust heat exchanging means may be an EGR cooler or an exhaust heat recovering device.

The heater core may be disposed at a rear end of the direction control valve with respect to the second circulation flow path.

The controller may control the direction control valve such that the cooling water is circulated through the first circulation channel and the second circulation channel when the heater is operated.

Further comprising an electronic thermostat provided on a third circulating flow path circulating from the engine to the radiator, wherein the control unit judges whether or not the engine is driven and controls the opening temperature of the engine-driven electronic thermostat to be higher than a preset reference temperature .

The control unit may control the directional control valve such that the engine is not driven and the cooling water is circulated through the first circulation channel and the second circulation channel when the heater is operated.

The control unit may control the cooling water to circulate through the first circulation channel, the second circulation channel, and the third circulation channel for a predetermined time when the engine and the battery are stopped.

The electronic thermostat may be provided at the front end of the radiator.

According to the present invention, the opening and closing directions of the directional control valve and the opening temperature of the electronic thermostat are appropriately controlled according to the necessity of heating or whether the engine is driven, thereby shortening the engine warm-up time, Thereby minimizing the engine operation time required for engine warm-up and heating, thereby improving the fuel efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a circuit diagram of a cooling water circulation circuit for a vehicle according to the prior art; Fig.
2 is a view for explaining the flow of cooling water when heating is not required in the heat management system for a vehicle according to the present invention.
3 is a view for explaining the flow of cooling water when heating is required in the heat management system for a vehicle according to the present invention.
4 is a view for explaining a need for heating in a heat management system for a vehicle according to the present invention and a flow of cooling water not yet used in an engine.
5 is a flowchart showing a control flow of a heat management system for a vehicle according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The heat management system for a hybrid vehicle of the present invention mainly comprises a direction control valve (7), exhaust heat exchanging means, a heater core (13), and a control unit (19).

2 to 4, the direction control valve 7 is provided at the rear end of the engine 1 to branch off the cooling water flowing in from the engine 1, Way valve.

The exhaust heat exchanging means is provided on the first circulation flow passage 3a branched to one side of the direction control valve 7 and circulating to the engine 1. [

At this time, an electric water pump 5 may be disposed in the first circulation passage 3a. Preferably, the electric water pump 5 is provided at the front end of the engine 1, Can be controlled to operate.

Here, the exhaust heat exchanging means may be disposed at the front end or the rear end of the direction control valve 7 with respect to the first circulation flow path 3a.

That is, regardless of whether the engine 1 is driven or the heater is operated, the cooling water is circulated in the exhaust heat exchanging means, and the flow path in which the cooling water flows from the engine 1 to the direction control valve 7, The exhaust heat exchanging means may be provided on the flow path through which the cooling water flows from the engine 1 to the engine 1.

The exhaust heat exchanging means may be an EGR cooler 11 or an exhaust heat recovering device 9.

The heater core 13 is provided on the second circulation flow path 3b which branches to the other side of the direction control valve 7 and circulates to the engine 1. [

Here, the heater core 13 may be disposed at the rear end of the direction control valve 7 with respect to the second circulation channel 3b.

That is, when the heating is unnecessary, the circulation of the cooling water to the heater core 13 is not required, so that the heater core 13 is disposed at the rear end of the direction control valve 7, So that it does not flow.

The control unit 19 determines whether or not the heater is operated so that the cooling water is circulated to the first circulation flow passage 3a and the cooling water is circulated to the second circulation flow passage 3b when the heater is not operated, 7).

That is, in a situation in which no heating is required, the direction control valve 7 is opened only to the exhaust heat exchanger side as shown in Figs. 2 and 5, and the cooling water is circulated to the exhaust heat exchanger side without circulating the cooling water to the heater coater side.

Therefore, the friction loss can be reduced through quick warm-up of the engine 1, thereby improving the efficiency of the engine 1 and improving the fuel efficiency. At this time, the control described above can be controlled irrespective of whether the engine 1 is driven or not.

The control unit 19 is connected to the heater control unit FATC and the engine control unit ECU so as to control the operation of the directional control valve 7 depending on whether the heater is operated or whether the engine 1 is driven have.

In addition, the control unit 19 can control the direction control valve 7 so that the cooling water is circulated through the first circulation passage 3a and the second circulation passage 3b when the heater is operated.

That is, in a situation where heating is required, as shown in Figs. 3 and 5, the directional control valve 7 is opened to both the exhaust heat exchanging means and the heater core 13 so that the cooling water is circulated in both directions.

Accordingly, the cooling water is simultaneously circulated in the heater core 13 and the exhaust heat exchanging means to improve the performance of the heater, and at the same time, the warm-up time of the engine 1 is also shortened, thereby improving fuel economy. At this time, the above control may be performed when the engine 1 is driven.

The present invention may further comprise an electronic thermostat 17 provided on the third circulation flow path 3c circulating from the engine 1 to the radiator 15.

Here, the electronic thermostat 17 can be adjusted by varying the opening temperature, and may be provided at the front end of the radiator 15.

The control unit 19 determines whether or not the engine 1 is driven and controls the opening temperature of the microcomputer electronic thermostat 17 of the engine 1 to be higher than a preset reference temperature.

That is, since the opening temperature of the electronic thermostat 17 is raised and controlled when the engine 1 is not driven, the inflow of the cooling water into the radiator 15 is delayed. As a result, the lowering of the cooling water temperature is delayed, The operation time of the engine 1 is reduced, thereby improving the fuel efficiency.

In addition, the control unit 19 controls the direction control valve 7 so that the engine 1 is not driven and the cooling water is circulated through the first circulation flow passage 3a and the second circulation flow passage 3b when the heater is operated can do.

4 and 5, when both the exhaust heat exchanging means and the heater core 13 are opened, the cooling water is circulated in both directions as shown in FIG. 4 and FIG. 5. That is, when the engine 1 is not driven and heating is required, And at the same time, the opening temperature of the electronic thermostat (17) is increased to reduce cooling of the cooling water by the radiator (15). Therefore, by increasing the operating time of the heater by the latent heat of the cooling water, the engine 1 is restarted by heating, thereby improving fuel economy.

On the other hand, when the engine 1 and the battery are stopped, the controller 19 circulates cooling water to the first circulation passage 3a, the second circulation passage 3b and the third circulation passage 3c for a predetermined time .

That is, when the engine 1 and the battery drive are turned off, the cooling water is circulated in the first, second, and third circulation conduits for a predetermined period of time to prevent boiling of the cooling water remaining in the exhaust heat recovery apparatus 9.

Here, the operation time of the electric water pump 5 has a control structure in which it is turned off when the water temperature sensor in the engine control device falls below a predetermined temperature. Accordingly, if the cooling water is simultaneously circulated through the first, second, and third circulation conduits, the temperature of the cooling water falls below a predetermined temperature as soon as possible, so that the operation time of the electric water pump 5 is reduced.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limited to the specific embodiments set forth herein; rather, .

1: engine 3a: first circulating flow passage
3b: second circulation flow path 3c: third circulation flow path
5: Water pump 7: Direction control valve
9: exhaust heat recovery device 11: EGR cooler
13: heater core 15: radiator
17: Electronic thermostat 19:

Claims (9)

A direction regulating valve for branching the cooling water flowing in from the engine;
Exhaust heat exchanging means provided on the first circulation flow passage branched to one side of the direction control valve and circulating to the engine;
A heater core provided on the second circulation flow path branched to the other side of the direction control valve and circulating to the engine; And
And a control unit for determining whether the heater is operating and controlling the directional control valve so that the cooling water is circulated through the first circulation channel when the heater is not operated and the cooling water is not circulated through the second circulation channel. The method according to claim 1,
Wherein the exhaust heat exchanging means is disposed at a front end or a rear end of the direction control valve with respect to the first circulation flow passage. The method of claim 2,
Wherein the exhaust heat exchanging means is an EGR cooler or an exhaust heat recovering device. The method according to claim 1,
Wherein the heater core is disposed at a rear end of the direction control valve with respect to the second circulation flow path. The method according to claim 1,
Wherein the control unit controls the directional control valve such that the cooling water is circulated through the first circulation channel and the second circulation channel when the heater is operated. The method according to claim 1,
Further comprising an electronic thermostat provided on a third circulating flow path circulating from the engine to the radiator,
Wherein the control unit determines whether or not the engine is driven and controls the opening temperature of the engine-driven electronic thermostat to be higher than a predetermined reference temperature. The method of claim 6,
Wherein the control unit controls the directional control valve such that the engine is not driven and the cooling water is circulated through the first circulation channel and the second circulation channel when the heater is operated. The method of claim 6,
Wherein the control unit controls the cooling water to circulate through the first circulation channel, the second circulation channel and the third circulation channel for a predetermined time when the engine and the battery are stopped. The method of claim 6,
Wherein the electronic thermostat is provided at a front end of the radiator.
KR1020140157866A 2014-11-13 2014-11-13 Heat management system for hybrid vehicles KR20160057517A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180050048A (en) * 2016-11-04 2018-05-14 현대자동차주식회사 Engine cooling system for vehicle and method controlling of the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20180050048A (en) * 2016-11-04 2018-05-14 현대자동차주식회사 Engine cooling system for vehicle and method controlling of the same

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