GB2538297A - A method and system for controlling a pump of a cooling system of an internal combustion engine of a vehicle - Google Patents

A method and system for controlling a pump of a cooling system of an internal combustion engine of a vehicle Download PDF

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Publication number
GB2538297A
GB2538297A GB1508332.2A GB201508332A GB2538297A GB 2538297 A GB2538297 A GB 2538297A GB 201508332 A GB201508332 A GB 201508332A GB 2538297 A GB2538297 A GB 2538297A
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United Kingdom
Prior art keywords
parameter
pump
cooling
fluid flow
cooling fluid
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GB1508332.2A
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GB201508332D0 (en
Inventor
Lachina Filippo
Emanuele Di Torralta Giorgio
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GM Global Technology Operations LLC
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GM Global Technology Operations LLC
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Priority to GB1508332.2A priority Critical patent/GB2538297A/en
Publication of GB201508332D0 publication Critical patent/GB201508332D0/en
Publication of GB2538297A publication Critical patent/GB2538297A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • F02B29/0493—Controlling the air charge temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
    • F02B29/04—Cooling of air intake supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

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

Abstract

A method and system for controlling a cooling fluid pump 6 of a cooling system for cooling intake air of an internal combustion engine 3 of a vehicle by a heat exchanger 2 supplied by cooling fluid delivered by said pump 6. The method comprising controlling (S40, S60, fig.2) a fluid flow parameter (Qw, fig.2) of the pump 6 based on the vehicle speed parameter (v, fig.2), an intake air flow parameter (QA, fig.2) of said engine 3 and/or a cooling fluid temperature parameter (Tw, fig.2) of said cooling fluid. The air intake may further comprise a compressor, such as a turbocharger, and/or an exhaust gas recirculation (EGR) system. The invention improves the performance of the cooling system by limiting the fluid flow (parameter) of the pump by an upper fluid flow threshold beyond which there is little or no improvement in efficiency thus control of the pump may be improved.

Description

A Method and System for Controlling a Pump of a Cooling System of an Internal Combustion Engine of a Vehicle
Description
The present invention relates to a method and a control system for controlling a cooling fluid pump of a cooling system for cooling intake air of an internal combustion engine of a vehicle by a heat exchanger supplied by cooling fluid delivered by said cooling fluid pump, to a vehicle comprising the control system and to a computer program product for carrying out the method.
From internal praxis vehicles with internal combustion engines and cooling systems for cooling intake air of these internal combustion engines are known wherein a cooling fluid is delivered by a cooling fluid pump to a heat exchanger in which said cooling fluid cools down said intake air. Such cooling systems are in particular advantageous in combination with compressors compressing -and thereby heating up -said intake air, and/or so-called EGR systems which at least temporarily supply exhaust gas of the internal combustion engine into fresh air, thereby providing intake air at a higher temperature than ambient temperature.
It is an object of the present invention to improve the performance of such cooling systems.
Said object is solved in particular by a method according to claim 1. Claim 8 refers to a control system for carrying out a method as described herein, claim 13 refers to a vehicle comprising a control system as described herein and claim 15 refers to a computer 3 0 program product for carrying out a method as described herein respectively, sub-claims refer to advantageous embodiments.
According to one aspect of the present invention a cooling system for cooling intake air of an internal combustion engine of a vehicle comprises a heat exchanger for cooling the intake air by heat exchange between intake air and a cooling fluid, in particular a heat exchanger being flown through by said intake air and/or cooling fluid in operation or adapted thereto respectively, and a cooling fluid pump which in operation delivers said cooling fluid to said heat exchanger or is adapted thereto respectively. Said heat exchanger is also called air heat exchanger herein for sake of distinction.
According to one embodiment, said cooling system may comprise a further heat exchanger for (re-)cooling said cooling fluid by heat exchange, in particular between the cooling fluid and ambient air, in particular a further heat exchanger being flown through by said cooling fluid and/or ambient air in operation or adapted thereto respectively. Said further heat exchanger is also called fluid heat exchanger herein for sake of distinction. The cooling fluid pump in operation may circulate the cooling fluid between said air heat exchanger and said fluid heat exchanger or be adapted thereto respectively.
According to one embodiment said cooling fluid may comprise, in particular be, water and/or another liquid.
According to one embodiment said (air) heat exchanger is arranged between or fluidly connected to said internal combustion engine, in particular an intake manifold thereof, and a compressor, in particular a compressor of a turbocharger, which in operation compresses said intake air or is adapted thereto respectively.
Additionally or alternatively said intake air may at least temporarily comprise 20 exhaust gas of said intemal combustion engine according to one embodiment. Thus, said intake air may also be a mixture of (pure) ambient or fresh air and exhaust gas according to one embodiment.
Thus, the vehicle may comprise or the intemal combustion engine may be combined with a compressor, in particular a turbocharger, and/or an exhaust gas recirculation ("EGR") system according to one embodiment respectively, wherein the (air) heat exchanger of the cooling system may be arranged between said internal combustion engine and said compressor and/or a valve of said EGR system.
According to one aspect of the present invention a fluid flow parameter of the pump is controlled based on a vehicle speed parameter of said vehicle, an intake air flow parameter of said internal combustion engine and/or a cooling fluid temperature parameter of said cooling fluid.
A higher/lower vehicle speed may increase/decrease cooling down the cooling fluid in the fluid heat exchanger. Thus, by controlling a fluid flow parameter of the pump based on a vehicle speed parameter, a control of the pump may be improved, in particular more precise, robust and/or efficient, according to one embodiment.
A variation of intake air flow may in particular influence heat exchange in the fluid heat exchanger. Thus, by controlling a fluid flow parameter of the pump based on an intake air flow parameter, a control of the pump may also be improved, in particular more precise, robust and/or efficient, according to one embodiment.
A high(er) cooling fluid temperature may deteriorate the cooling system.
Thus, by controlling a fluid flow parameter of the pump based on a cooling fluid temperature parameter, possible deterioration of the cooling system may be reduced or avoided according to one embodiment.
The fluid flow parameter may in one embodiment describe a flow, in particular a volume or mass flow, of cooling fluid, in particular through the pump and or (air/fluid) heat exchanger, or depend thereon, in particular linearly, like in particular a speed of the pump or the like. It thus may be determined in liters or kilograms per minute, rounds per minute or the like. The fluid flow parameter may in one embodiment be measured directly or determined on basis of other, in particular measured, parameters.
The vehicle speed parameter may in one embodiment describe a forward velocity of the vehicle, in particular in its longitudinal direction, or depend thereon, in particular linearly, like in particular a rotational speed of a vehicle's wheel or the like. It thus may be determined in kilometers per hour, rounds per minute or the like. The vehicle speed parameter may in one embodiment be measured directly or determined on basis of other, in particular measured, parameters.
The vehicle may in particular be a car, in particular a passenger car.
The intake air flow parameter may in one embodiment describe a flow, in particular a volume or mass flow, of intake air of the internal combustion engine, in particular comprising at least temporarily exhaust gas and/or through the compressor and or (air) heat exchanger, or depend thereon, in particular linearly, like in particular a speed of the 3 0 compressor or the like. It thus may be determined in liters or kilograms per minute, rounds per minute or the like. The intake air flow parameter may in one embodiment be measured directly or determined on basis of other, in particular measured, parameters.
The cooling fluid temperature parameter may in one embodiment describe a temperature of cooling fluid, in particular a temperature of cooling fluid leaving the (air) heat exchanger, or depend thereon, in particular linearly. It thus may be determined in Kelvin, degrees Celsius or the like. The cooling fluid temperature parameter may in one embodiment be measured directly or determined on basis of other, in particular measured, parameters.
According to one embodiment, a target efficiency parameter of the cooling system is determined, in particular based on a target value of an air outlet temperature parameter of said heat exchanger.
Said (target value of an) air outlet temperature parameter may in one embodiment describe a (target or desired or requested) temperature of intake air of the internal combustion engine, in particular a temperature of intake air leaving the (air) heat exchanger, or depend thereon, in particular linearly. It thus may be determined in Kelvin, degrees Celsius or the like.
The (target value of an) air outlet temperature parameter may in one embodiment be predetermined by a motor control and/or based on internal combustion engine speed and/or load and/or environmental conditions, in particular in a manner basically known to the skilled person and/or based on a map or the like.
The target efficiency parameter may in one embodiment describe an efficiency of the (air) heat exchanger, in particular a quotient of heat transfer between intake air and cooling fluid, or depend thereon, in particular linearly. It thus may be determined dimensionless.
A higher/lower efficiency of the (air) heat exchanger may be advantageous to achieve a higher/lower (target value of an) air outlet temperature (parameter). Thus, by determining a target efficiency parameter based on a target value of an air outlet temperature parameter, a control of the pump may be improved, in particular more precise, robust and/or efficient, according to one embodiment.
According to one embodiment, a current efficiency parameter of the cooling system is determined, in particular based on said vehicle speed parameter, said intake air flow parameter and/or a current value of said fluid flow parameter.
The current efficiency parameter may in one embodiment correspond to or be determined analogously to the target efficiency parameter respectively.
The efficiency of the (air) heat exchanger may in particular depend on the intake air flow and/or the (current) cooling fluid flow. The efficiency of the further or fluid heat exchanger may in particular depend on the vehicle speed and/or the (current) cooling fluid flow. Thus, an overall efficiency of the cooling system may in particular depend on these three parameters. Therefore, by determining a current efficiency parameter based on one or more of these three parameters, in particular based on all of these three parameters, a control of the pump may be improved, in particular more precise, robust and/or efficient, according to one embodiment.
According to one embodiment said fluid flow parameter of the pump is controlled based on said target efficiency parameter and said current efficiency parameter of the cooling system, in particular based on a comparison, in particular a difference, of the target and current efficiency parameter. According to one embodiment said fluid flow (parameter) may be (requested to be) increased if the target efficiency (parameter) is larger than the current efficiency (parameter) and/or may be (requested to be) decreased if the target efficiency (parameter) is smaller than the current efficiency (parameter), in particular proportional to the difference, in fixed steps or the like. According to one embodiment such request may be carried out depending on further conditions to be met as explained below, in particular so that an increase(d) cooling fluid flow does not exceed an upper fluid flow threshold.
According to one embodiment a current value of said cooling fluid temperature parameter is determined, in particular based on an air intake temperature parameter of said heat exchanger and/or an ambient air temperature parameter.
Said air intake temperature parameter may in one embodiment describe a (current) temperature of intake air of the internal combustion engine, in particular a 3 0 temperature of intake air entering the (air) heat exchanger, or depend thereon, in particular linearly. It thus may be determined in Kelvin, degrees Celsius or the like.
Said ambient air temperature parameter may in one embodiment describe a (current) temperature of ambient air of the vehicle, in particular a temperature of ambient air entering the further or fluid heat exchanger respectively, or depend thereon, in particular linearly. It thus may be determined in Kelvin, degrees Celsius or the like.
By determining a current value of said cooling fluid temperature parameter based on an air intake temperature parameter of said heat exchanger and/or an ambient air temperature parameter, said current value of said cooling fluid temperature parameter may advantageously be determined without (direct) measurement of the cooling fluid temperature itself according to one embodiment. The determination may be based on fixed, in particular reference, efficiency parameters.
According to one embodiment said fluid flow parameter of the pump is controlled based on said current value of said cooling fluid temperature parameter, in particular based on a comparison, in particular a difference, of said current value of said cooling fluid temperature parameter with an upper threshold of said cooling fluid temperature parameter. In particular said fluid flow (parameter) may be (requested to be) increased if the current value of said cooling fluid temperature parameter is larger than the upper threshold, in particular proportional to the difference, in fixed steps or the like. According to one embodiment such request may be carried out depending on further conditions to be met as explained below, in particular so that an increase(d) cooling fluid 2 0 flow does not exceed an upper fluid flow threshold.
By controlling the fluid flow (parameter) of the pump based on the (current value of said) cooling fluid temperature (parameter), according to one embodiment possible deterioration of the cooling system due to (too) high cooling fluid temperature may be avoided or reduced according to one embodiment.
According to one embodiment an upper fluid flow threshold of the pump is determined, in particular in advance and/or based on an efficiency parameter of the cooling system, in particular an efficiency parameter (determined) as described above.
It has turned out that an increase of an (overall) efficiency of the cooling system may decrease and, at least basically, vanish beyond a certain cooling fluid flow. In other words an (overall) efficiency of the cooling system may not or at most slightly increase beyond a certain cooling fluid flow, in particular asymptotically, approach an upper limit. Thus, increasing the fluid flow (parameter) of the pump beyond such upper limit will not (at least significantly) further improve the cooling but only increase the energy consumed by the pump. Therefore, by limiting the fluid flow (parameter) of the pump by said upper fluid flow threshold of the pump a control of the pump may be improved, in particular more precise, robust and/or efficient, according to one embodiment.
According to one embodiment said fluid flow (parameter) of the pump is open-loop controlled, in particular without temperature feedback of one or more of the temperature parameters mentioned herein. This may avoid (additional) temperature sensors and thus result in an improved control of the pump, in particular a cheaper, more precise, robust and/or efficient control, according to one embodiment.
According to one aspect of the present invention a control system for controlling the cooling fluid pump of the cooling system is adapted for carrying out a method as described herein and/or comprises: means for controlling an or the fluid flow parameter of the pump respectively based on an or the vehicle speed parameter of said vehicle, an or the intake air flow parameter of said internal combustion engine and/or an or the cooling fluid temperature parameter of said cooling fluid respectively.
According to one embodiment the control system comprises means for determining an or the target efficiency parameter of the cooling system, in particular based on an or the target value of an or the air outlet temperature parameter of said heat exchanger respectively, and means for determining an or the current efficiency parameter of the cooling system, in particular based on said vehicle speed parameter, said intake air flow parameter and/or an or the current value of said fluid flow parameter respectively, wherein said means for controlling said fluid flow parameter of the pump are means for controlling said fluid flow parameter of the pump based on said target efficiency parameter and said current efficiency parameter of the cooling system or adapted thereto respectively.
According to one embodiment the control system comprises means for determining an or the current value of said cooling fluid temperature parameter, in particular based on an or the air intake temperature parameter of said heat exchanger and/or an or the ambient air temperature parameter respectively, wherein said means for controlling said fluid flow parameter of the pump are means for controlling said fluid flow parameter of the pump based on said current value of said cooling fluid temperature parameter, in particular based on a comparison of said current value of said cooling fluid temperature parameter with an or the upper threshold of said cooling fluid temperature parameter respectively or adapted thereto respectively.
According to one embodiment the control system comprises means for determining an or the upper fluid flow threshold of the pump, in particular based on an or the efficiency parameter of the cooling system respectively, and means for limiting said fluid flow parameter of the pump by said upper fluid flow threshold of the pump.
According to one embodiment the means for controlling said fluid flow parameter of the pump are means for open-loop controlling said fluid flow parameter of the pump, in particular without temperature feedback of one or more of said temperature parameters or adapted thereto respectively.
Means according to one aspect of the present invention may be implemented by software, in particular a computer program or computer program module, and/or hardware, in particular a computer or central processing unit which is disposed to carry out a method described herein, one or more sensors and/or actors communicating with, in particular controlled by, said computer or central processing unit, or a computer program product, in particular a data carrier and a data storage device respectively, comprising program code which implements a method described herein when running on a computer or central processing unit. The computer program or computer program module may be stored on the data carrier and the data storage device respectively in particular in a non-volatile 2 0 way.
Said means in particular may be implemented in an apparatus, and in particular in a controller and/or a driver assistance device.
The system may also be understood as comprising means in terms of function module architecture that is to be realized or implemented by the computer program 25 or computer program module.
One or more steps of the method described herein are carried out fullor or semi-automatically according to one embodiment.
Further features of the present invention are disclosed in the sub-claims and the following description of preferred embodiments. Thereto it is shown, partially 3 0 schematically, in: Fig. 1 a part of a vehicle including a cooling and a control system according to an embodiment of the present invention; and Fig. 2 a method according to an embodiment of the present invention, the method being implemented by a computer program or a computer program module.
Fig. 1 shows in part a vehicle including a cooling and a control system according to an embodiment of the present invention.
The vehicle comprises an internal combustion engine 3, a turbocharger with a compressor 1 and a turbine 4, and an EGR system with an EGR valve 5.
The cooling system comprises an air heat exchanger 2 for heat exchange between intake air of combustion engine 3 compressed by compressor 1 and at least temporarily comprising exhaust gas of the internal combustion engine 3 via EGR valve 5 and a cooling fluid.
The cooling system further comprises a fluid heat exchanger 7 for heat exchange between said cooling fluid and ambient air and a cooling fluid pump 6 circulating said cooling fluid amongst both heat exchangers 2 and 7.
The control system comprises an ECU 8 controlling in particular internal combustion engine 3 and cooling fluid pump 6.
ECU 8 controls fluid pump 6 by carrying out a method according to an embodiment of the present invention which is explained in further detail with respect to Fig. 2.
In a first step S10 ECU 8 determines a target efficiency parameter ea of the cooling system based on a target value of an air outlet temperature parameter TA., d of the air heat exchanger 2 describing an outlet temperature of the intake air leaving heat exchanger 2 (see Fig. 1) which is determined by ECU 8 in a known manner based on engine speed and/or load of internal combustion engine 3 and/or environmental conditions, further determines a current efficiency parameter se of the cooling system based on a vehicle speed parameter v, an intake air flow parameter QA describing a flow of intake air through air heat exchanger 2 (see Fig. 1) and a current value of a fluid flow parameter Qw describing a flow of cooling fluid through pump 6 and air heat exchanger 2 respectively (see Fig. 1).
ECU 8 further determines in step S10 a current value of a cooling fluid temperature parameter Tw describing a temperature of cooling fluid leaving air heat exchanger 2 (see Fig. 1) based on an air intake temperature parameter TA of air heat exchanger 2, describing a temperature of intake air entering air heat exchanger 2 (see Fig. 1), and an ambient air temperature parameter TaA describing a temperature of ambient air entering fluid heat exchanger 7 (see Fig. 1).
ECU 8 further determines in step S10 an upper fluid flow threshold Qw, max of 10 the pump 6 based on the current efficiency parameter ea of the cooling system above which an increase of an overall efficiency of the cooling system is smaller than a given limit.
In a second step S20 ECU 8 determines whether said current value of said cooling fluid temperature parameter Tw exceeds an upper threshold Tw, max of said cooling fluid temperature parameter or not.
If ECU 8 determines in step S20 that said current value Tw does not exceed said upper threshold Tw, max (S20: "N"), it proceeds to step S30, otherwise (S20: "Y") ECU 8 proceeds to step S50.
In step S30 ECU 8 determines whether said target efficiency parameter ea is larger than said current efficiency parameter ea or not.
If ECU 8 determines in step S30 that said target efficiency parameter ea is not larger than said current efficiency parameter ea (S30: "N"), it proceeds to step S40, otherwise (S30: "Y") ECU 8 proceeds to step S50.
In step S40 ECU 8 decreases the fluid flow parameter Qw. In the embodiment it decreases the fluid flow parameter Qw by a predetermined amount eQw by 25 way of example. Afterwards ECU 8 returns to step 810, now using the updated flow parameter Qw.
In step S50 ECU 8 determines whether an increase(d) fluid flow parameter Qw, by way of example increased by a predetermined amount AQw, would be larger than said upper fluid flow threshold Qw, max or not.
If ECU 8 determines in step S50 that said increase(d) fluid flow parameter Qw would be larger than said upper fluid flow threshold Qw, max (S50: "Y"), it returns to step 810 without increasing the fluid flow parameter Qw, thus limiting said fluid flow parameter Qw of pump 6 by said upper fluid flow threshold Qw, max.
Otherwise (S50: "N") ECU 8 proceeds to step S60. In step S60 ECU 8 increases the fluid flow parameter Qw. In the embodiment it increases the fluid flow parameter Qw by the predetermined amount AQw by way of example. Afterwards ECU 8 returns to step SW, now using the updated flow parameter Qw.
The ECU 8 may include a digital central processing unit (CPU) or processor in communication with a memory system and an interface bus. Instead of an ECU, the system may have a different type of processor to provide the electronic logic, e.g. an embedded controller, an onboard computer, or any processing module that might be deployed in the vehicle. The CPU is configured to execute instructions stored as a program in the memory system, and send and receive signals to and from the interface bus. The -15 memory system may include various storage types including optical storage, magnetic storage, solid state storage, and other non-volatile memory. The interface bus may be configured to send, receive, and modulate analog and/or digital signals to and from the various sensors and control devices. The program may embody the methods disclosed herein, allowing the CPU to execute the steps of such control methods.
The program stored in the memory system is transmitted from outside via a cable or in a wireless fashion. Outside the system it is normally visible as a computer program product, which is also called transient or non-transient computer readable medium or machine readable medium in the art, and which should be understood to be a computer program code residing on a carrier, the carrier preferably being either transitory or non-transitory in nature with the consequence that the computer program product can be regarded to be transitory or non-transitory in nature.
An example of a transitory computer program product is a signal, e.g. an electromagnetic signal such as an optical signal, which is a transitory carrier for the computer program code. Carrying such computer program code can be achieved by 3 0 modulating the signal by a conventional modulation technique such as QPSK for digital data, such that binary data representing said computer program code is impressed on the transitory electromagnetic signal. Such signals are e.g. made use of when transmitting computer program code in a wireless fashion via a WiFi connection to a laptop.
In case of a non-transitory computer program product the computer program code is embodied in a tangible storage medium. The storage medium is then the non-transitory carrier mentioned above, such that the computer program code is permanently or non-permanently stored in a retrievable way in or on this storage medium.
The storage medium can be of conventional type known in computer technology such as a flash memory, an Asic, a CD or the like.
While at least one exemplary embodiment has been presented in the foregoing summary and detailed description, it should be appreciated that avast number of variations exist. It should also be appreciated that the exemplary embodiment or exemplary embodiments are only examples, and are not intended to limit the scope, applicability, or configuration in any way. Rather, the foregoing summary and detailed description will provide those skilled in the art with a convenient road map for implementing at least one exemplary embodiment, it being understood that various changes may be made in the function and arrangement of elements described in an exemplary embodiment without departing from the scope as set forth in the appended claims and their legal equivalents.
REFERENCE NUMBERS
1 compressor 2 air heat exchanger 3 internal combustion engine 4 turbine EGR valve 6 cooling fluid pump 7 fluid heat exchanger 8 ECU QA intake air flow parameter QW fluid flow parameter Qw, max upper fluid flow threshold TaA ambient temperature parameter TAI air intake temperature parameter TAO, d target value of air outlet temperature parameter Tw cooling fluid temperature parameter Tw, max upper threshold of said cooling fluid temperature parameter v vehicle speed parameter ea target efficiency parameter ea current efficiency parameter

Claims (15)

  1. Claims 1. A method for controlling a cooling fluid pump (6) of a cooling system for cooling intake air of an internal combustion engine (3) of a vehicle by a heat exchanger (2) supplied by cooling fluid delivered by said cooling fluid pump (6), the method comprising: controlling (S40, S60) a fluid flow parameter (Qw) of the pump (6) based on a vehicle speed parameter (v) of said vehicle, an intake air flow parameter (QA) of said internal combustion engine (3) and/or a cooling fluid temperature parameter (Tw) of said cooling fluid.
    2. A method according to the preceding claim, comprising: determining (S10) a target efficiency parameter (ea) of the cooling system, in particular based on a target value of an air outlet temperature parameter (TAO, a) of said heat exchanger (2); determining (S10) a current efficiency parameter (ea) of the cooling system, in particular based on said vehicle speed parameter (v), said intake air flow parameter 2 0 (QA) and/or a current value of said fluid flow parameter (Qw); and controlling (S40, S60) said fluid flow parameter (QA) of the pump (6) based (S30) on said target efficiency parameter (Ed) and said current efficiency parameter (ea) of the cooling system.
  2. 2 5
  3. 3. A method according to one of the preceding claims, comprising: determining (S10) a current value of said cooling fluid temperature parameter (Tw), in particular based on an air intake temperature parameter (TA,0 of said heat exchanger (2) and/or an ambient air temperature parameter (TaA); and controlling (860) said fluid flow parameter (Ow) of the pump (6) based (S20) on said 3 0 current value of said cooling fluid temperature parameter (Tw), in particular based (S20) on a comparison of said current value of said cooling fluid temperature parameter (Tw) with an upper threshold of said cooling fluid temperature parameter (Tw, max).
  4. 4. A method according to one of the preceding claims, comprising: determining (S10) an upper fluid flow threshold (Qw,mox) of the pump (6), in particular based on an efficiency parameter (ea) of the cooling system; and limiting (S50) said fluid flow parameter (Qw) of the pump (6) by said upper fluid flow threshold of the pump (Ow. max).
  5. 5. A method according to one of the preceding claims, wherein said fluid flow parameter (Ow) of the pump (2) is open-loop controlled, in particular without temperature feedback of one or more of said temperature parameters.
  6. 6. A method according to one of the preceding claims, wherein said heat exchanger (2) is arranged between said internal combustion engine (3) and a compressor (1), in particular of a turbocharger (1, 4), for compressing said intake air.
  7. 7. A method according to one of the preceding claims, wherein said intake air at least temporarily (5) comprises exhaust gas of said internal combustion engine (3).
  8. 8. A control system (8) for controlling a cooling fluid pump (6) of a cooling system for cooling intake air of an internal combustion engine (3) of a vehicle by a heat exchanger (2) supplied by cooling fluid delivered by said cooling fluid pump (6), the system (8) comprising: means (8) for controlling a fluid flow parameter (Qw) of the pump (6) based on a vehicle speed parameter (v) of said vehicle, an intake air flow parameter (0A) of said internal combustion engine (3) and/or a cooling fluid temperature parameter (Tw) of said cooling fluid.
  9. 9. A control system (8) according to the preceding claim, comprising: means (8) for determining a target efficiency parameter (cd) of the cooling system, in particular based on a target value of an air outlet temperature parameter (TAO, d) of said heat exchanger (2); and means (8) for determining a current efficiency parameter (c.) of the cooling system, in particular based on said vehicle speed parameter (v), said intake air flow parameter (Q$ and/or a current value of said fluid flow parameter (Qw); wherein said means (8) for controlling said fluid flow parameter of the pump are means for controlling said fluid flow parameter of the pump based on said target efficiency parameter (ad) and said current efficiency parameter (ea) of the cooling system.
  10. 10. A control system (8) according to one of the preceding claims, comprising: means (8) for determining a current value of said cooling fluid temperature parameter (Tw), in particular based on an air intake temperature parameter (TA, i) of said heat exchanger (2) and/or an ambient air temperature parameter (T.A); wherein said means (8) for controlling said fluid flow parameter of the pump are means for controlling said fluid flow parameter of the pump based on said current value of said cooling fluid temperature parameter (Tw), in particular based (S20) on a comparison of said current value of said cooling fluid temperature parameter (Tw) with an upper threshold of said cooling fluid temperature parameter (Tw, max).
  11. 11. A control system (8) according to one of the preceding claims, comprising: means (8) for determining an upper fluid flow threshold (Qw, max) of the pump (6), in particular based on an efficiency parameter (ea) of the cooling system; and means (8) for limiting said fluid flow parameter (Qw) of the pump (6) by said upper fluid flow threshold of the pump (Qw, max).
  12. 12.
  13. 13.
  14. 14.
    A control system (8) according to one of the preceding claims, wherein said means (8) for controlling said fluid flow parameter of the pump are means for open-loop controlling said fluid flow parameter of the pump, in particular without temperature feedback of one or more of said temperature parameters.
    A vehicle, in particular a car, comprising an internal combustion engine (3), a cooling system for cooling intake air of said internal combustion engine, said cooling system comprising a heat exchanger (2) and a cooling fluid pump (6), and a control system (8) according to one of the preceding claims for controlling said cooling fluid pump.
    A vehicle according to the preceding claim, wherein said heat exchanger (2) is arranged between said internal combustion engine (3) and a compressor (1), in particular of a turbocharger (1, 4), for compressing said intake air, and/or comprising an exhaust gas recirculation system (5).
  15. 15. A computer program product comprising source code recorded on a computer-readable data carrier for carrying out the method according to one of claims 1 to 7.
GB1508332.2A 2015-05-14 2015-05-14 A method and system for controlling a pump of a cooling system of an internal combustion engine of a vehicle Withdrawn GB2538297A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030221638A1 (en) * 2002-04-06 2003-12-04 Reiko Haase Cooling system, in particular for a motor vehicle engine having indirect charge air cooling
US20070261682A1 (en) * 2006-01-30 2007-11-15 Smith Norman J Engine after-cooling system
US20090211542A1 (en) * 2004-12-23 2009-08-27 Valeo Thermique Moteur System for Controlling the Thermal Energy of a Motor Vehicle Engine by Adjusting the Fluid Actuators of Said System
US20120137993A1 (en) * 2010-12-07 2012-06-07 Hyundai Motor Company Apparatus of cooling system for vehicle and controlling method using the same
US20140251239A1 (en) * 2013-03-11 2014-09-11 Ford Global Technologies, Llc Charge air cooling control for boosted engines to actively maintain targeted intake manifold air temperature
US20150007561A1 (en) * 2013-07-05 2015-01-08 Denso Thermal Systems S.P.A. Active conditioning system of a gaseous fluid intake of an internal combustion engine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030221638A1 (en) * 2002-04-06 2003-12-04 Reiko Haase Cooling system, in particular for a motor vehicle engine having indirect charge air cooling
US20090211542A1 (en) * 2004-12-23 2009-08-27 Valeo Thermique Moteur System for Controlling the Thermal Energy of a Motor Vehicle Engine by Adjusting the Fluid Actuators of Said System
US20070261682A1 (en) * 2006-01-30 2007-11-15 Smith Norman J Engine after-cooling system
US20120137993A1 (en) * 2010-12-07 2012-06-07 Hyundai Motor Company Apparatus of cooling system for vehicle and controlling method using the same
US20140251239A1 (en) * 2013-03-11 2014-09-11 Ford Global Technologies, Llc Charge air cooling control for boosted engines to actively maintain targeted intake manifold air temperature
US20150007561A1 (en) * 2013-07-05 2015-01-08 Denso Thermal Systems S.P.A. Active conditioning system of a gaseous fluid intake of an internal combustion engine

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