GB2475105A - Method for the control of a switchable water pump in an internal combustion engine - Google Patents
Method for the control of a switchable water pump in an internal combustion engine Download PDFInfo
- Publication number
- GB2475105A GB2475105A GB0919561A GB0919561A GB2475105A GB 2475105 A GB2475105 A GB 2475105A GB 0919561 A GB0919561 A GB 0919561A GB 0919561 A GB0919561 A GB 0919561A GB 2475105 A GB2475105 A GB 2475105A
- Authority
- GB
- United Kingdom
- Prior art keywords
- water pump
- combustion engine
- internal combustion
- control
- switchable water
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 238000005259 measurement Methods 0.000 claims abstract 2
- 238000004590 computer program Methods 0.000 claims description 14
- 239000000446 fuel Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000001186 cumulative effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000011217 control strategy Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P3/00—Liquid cooling
- F01P3/02—Arrangements for cooling cylinders or cylinder heads
-
- 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
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
-
- 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
- F01P7/162—Controlling of coolant flow the coolant being liquid by thermostatic control by cutting in and out of pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P2025/00—Measuring
- F01P2025/08—Temperature
- F01P2025/33—Cylinder head temperature
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Method for the control of a switchable water pump for a water cooling circuit in an internal combustion engine, characterised by monitoring a parameter representative of the cylinder head temperature. When the cylinder head temperature is determined to be below a predetermined value, at least an on-off cycle for the switchable water pump is performed. The on-off cycle comprises at least a first phase in which the water pump is switched OFF for a time period T1 and a second phase in which the water pump is switched ON for a time period T2. Preferably, an internal combustion engine, and in particular a diesel engine, having associated sensors for the measurement of combustion parameters, and comprising an electronic control unit (ECU), is configured for carrying out the method for the control of the switchable water pump.
Description
METHCD FOR THE CTL OF A SWITCHBLE TER PUMP IN AN INTEThL 4BUSTI EMGINE
TEHNIL FD
The present invention relates to a method for the control of a switchable water pump in an internal combustion engine.
BAK3ND In modern internal combustion engines cooling systems for the engine usually comprise a water pump and a suitable water cooling circuits.
Such water pumps may be switchable water pumps, namely pumps that can be shut off in order to save energy and to warm up faster the engine.
However, the following problems usually arise in the use of switchable water pumps: switching off the pump for a long time could lead to excessive temperatures in the cylinder head.
Also switching off the pump for too long may lead to excessive NO emissions if a water cooled EGR cooler is used.
Finally, switching on the pump for too long may lead to excessive energy consumption.
An object of the invention is to devise a method for the control of a switchable water pump in an internal combustion engine that high motor performance.
Another object is to provide a control strategy for the switchable water pump without using complex devices and by taking advantage from the computational capabilities of the Electronic Control Unit (ECU) of the vehicle.
Another object of the present invention is to meet these goals by means of a simple, rational and inexpensive solution.
These objects are achieved by a method, by an engine, by a computer program and computer program product, and by an electromagnetic signal having the features recited in the independent claims.
The dependent claims delineate preferred and/or especially advantageous aspects of the invention.
SMPY OF THE flVENTI1 The invention provides for a method for the control of a switchable water pump for a water cooling circuit in an internal combustion engine, characterized in that of monitoring a parameter representative of the cylinder head temperature and, in case said temperature is below a predetermined value, perform at least an on-off cycle for said switchable water pump, said on-off cycle comprising at least a first phase in which the water pump is switched OFF for a time period Tl and a second phase in which the water pump is switched ON for a time period T2.
Preferably the OFF period Ti of the water pump is longer than the ON period T2 of the water pump.
Preferably the ratio between time period T2 and time period Ti is inferior to 1/30.
Also above a predetermined value of cylinder head temperature the switchable water pump is always ON.
The method according to the invention can be realized in the form of a computer program comprising a program-code to carry out all the steps of the method of the invention and in the form of a computer program product comprising means for executing the computer program.
The computer program product comprises, according to a preferred embodiment of the invention, a control apparatus for an IC engine, for example the ECU of the engine, in which the program is stored so that the control apparatus defines the invention in the same way as the method. In this case, when the control apparatus executes the computer program all the steps of the method according to the invention are carried out.
The method according to the invention can be also realized in the form of an electromagnetic signal, said signal being modulated to carry a sequence of data bits which represent a computer program to carry out all steps of the method of the invention.
The invention further provides an internal combustion engine specially arranged for carrying out the method of the invention.
BRIEF DESCRIPTI OF THE DRAWINGS
The present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an experimental graph concerning a comparison between the strategy of the present invention and other purrp strategies on several motor parameters; and Figure 2 is an experimental graph concerning the effect of the invention on NO emissions and cumulative NO emissions and also the effect of the invention on fuel consumption and cumulative fuel consumption.
DESCRIPTIT OF THEI PREFERRED BCDIMENT
A preferred embodiment of the present invention is now described also with the help of the mentioned figures.
According to the invention, the method for the control of a switchable water pump in an internal combustion engine comprises a phase in which the temperature of the cylinder head is monitored.
If the terriperature the cylinder head is below a predetermined value the switchable water pump is acted upon for a series of on-off cycles, said cycles having at least a phase in which the water pump is switched OFF for a period Ti and a phase in which the water pump is switched ON for a period T2.
Preferably the period Ti is longer than the period T2 It has been found beneficial to use OFF periods Ti that are substantially longer than ON periods T2.
More specifically, it has been found beneficial that the ratio between time period T2 and time period Ti is equal or inferior to 1/30.
As an example, time period T2 in which the water pump is ON may be 2 seconds or less and time period Ti in which the water pump is OFF may be 60 seconds or more. Other time values may be used according to circumstances.
Preferably, when the temperature of a cylinder head rises above a predetermined value the switchable water pump is always ON.
According to a preferred embodiment of the method the switchable water pump is always ON when the cylinder head temperature is at least above 80 00.
The value of temperature mentioned is purely indicative, other predetermined values may be set according to circumstances.
If, by effect of the continuous ON state of the switchable water pump, the cylinder head temperature falls below said predetermined value, the OFF-ON phases of the pump may be repeated cyclically as explained above.
In a preferred embodiment of the invention the temperature of the cylinder head is monitored, but without departing from the inventive concepts hereby described, in the alternative it can be monitored a different motor parameter representative of the temperature.
By using the switchable water pump control method of the invention the following results may be achieved.
As depicted in the experimental graph of Figure 1, the cylinder head temperature reached with the method is very close to the one that is reached with the condition of water pump always ON.
From the experimental graph of Figure 2 it can be seen that the effect on NO emissions and on cumulative NO emissions is that these emissions are substantially at the same level with the condition of water pump always ON and inferior to the condition of water pump always OFF.
Finally, from the same experimental graph of Figure 2 it can be seen that fuel consumption using the inventive strategy of the methods is very close to fuel consumption when water pump is always OFF.
These facts are very significant in terms of reduced fuel consumption.
\n additional benefit of the invention is that the it can be performed using a simple on-off switchable water pump (SWP), without the request of residual water circulation when the switchable water pump is OFF to cool the cylinder head, avoiding increase of components costs.
Finally fuel economy in a New European Driving Cycle (NEEC), which is considered to represent the typical usage of a vehicle, has been measured using the method of the invention and is around 2%.
While the present invention has been described with respect to certain preferred embodiments and particular applications, it is understood that the description set forth herein above is to be taken by way of example and not of limitation. Those skilled in the art will recognize various modifications to the particular embodiments are within the scope of the appended claims. Therefore, it is intended that the invention not be limited to the disclosed embodiments, but that it has the full scope permitted by the language of the following claims. cLs
Claims (10)
1. Method for the control of a switchable water pump for a water cooling circuit in an internal combustion engine, characterized in that of monitoring a parameter representative of the cylinder head temperature and, in case said temperature is below a predetermined value, perform at least an on-off cycle for said switchable water pump, said on-off cycle comprising at least a first phase in which the water pump is switched OFF for a time period Ti and a second phase in which the water pump is switched ON for a time period T2.
2. Method for the control of a switchable water pump device in an internal combustion engine, as in claim 1, in which the OFF period Ti of the water pump is longer than the ON period T2 of the water pump.
3. Method for the control of a switchable water pump device in an internal combustion engine, as in claim 2, in which the ratio between the length of time period T2 and the length of time period Ti is equal or inferior to 1/30.
4. Method for the control of a switchable water pump device in an internal combustion engine, as in claim 1, in which when said cylinder head temperature is above a predetermined value the switchable water pump is always ON.
5. Method for the control of a switchable water pump device in an internal combustion engine, as in claim 4, in which the predetermined value of temperature above which said switchable water pump is always ON is at least 80 °C.
6. Internal combustion engine, in particular Diesel engine, the combustion engine having associated sensors for the measurement of combustion parameters, characterized in that the internal combustion engine comprises an ECU configured for carrying out the method according to any of the preceding claims.
7. A computer program comprising a cornputer-code suitable for performing the steps of the method of claim 1.
8. Computer program product comprising a computer program according to claim 7.
9. Computer program product as in claim 8, comprising a control apparatus wherein the computer program is stored.
10. An electromagnetic signal modulated as a carrier for a sequence of data bits representing the computer program according to claim 7.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919561A GB2475105A (en) | 2009-11-09 | 2009-11-09 | Method for the control of a switchable water pump in an internal combustion engine |
| RU2010145338/06A RU2536476C2 (en) | 2009-11-09 | 2010-11-08 | Method of controlling switch water pump for water coolant loop in internal combustion engine; internal combustion engine and control unit |
| US12/941,863 US20110112742A1 (en) | 2009-11-09 | 2010-11-08 | Method for the control of a switchable water pump in an internal combustion engine |
| CN2010105456722A CN102052139A (en) | 2009-11-09 | 2010-11-09 | Method for the control of a switchable water pump in an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0919561A GB2475105A (en) | 2009-11-09 | 2009-11-09 | Method for the control of a switchable water pump in an internal combustion engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0919561D0 GB0919561D0 (en) | 2009-12-23 |
| GB2475105A true GB2475105A (en) | 2011-05-11 |
Family
ID=41502069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0919561A Withdrawn GB2475105A (en) | 2009-11-09 | 2009-11-09 | Method for the control of a switchable water pump in an internal combustion engine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20110112742A1 (en) |
| CN (1) | CN102052139A (en) |
| GB (1) | GB2475105A (en) |
| RU (1) | RU2536476C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2490935A (en) * | 2011-05-19 | 2012-11-21 | Gm Global Tech Operations Inc | Method of diagnosing cooling pump in an internal combustion engine status and associated control methods |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012135942A1 (en) | 2011-04-04 | 2012-10-11 | Litens Automotive Partnership | Clutch mechanism and decoupler device with same |
| WO2012139224A1 (en) | 2011-04-11 | 2012-10-18 | Litens Automotive Partnership | Multi-speed drive for transferring power to a load |
| WO2013003937A1 (en) | 2011-05-13 | 2013-01-10 | Litens Automotive Partnership | Intelligent belt drive system and method |
| US9181989B2 (en) | 2011-08-08 | 2015-11-10 | Litens Automotive Partnership | Decoupler assembly |
| WO2013033822A1 (en) | 2011-09-05 | 2013-03-14 | Litens Automotive Partnership | Intelligent belt drive system and method |
| WO2013159181A1 (en) * | 2012-04-28 | 2013-10-31 | Litens Automotive Partnership | Adjustable tensioner |
| JP5698821B1 (en) * | 2013-10-22 | 2015-04-08 | ファナック株式会社 | Coolant supply device |
| US10655689B2 (en) | 2013-11-14 | 2020-05-19 | Litens Automotive Partnership | Decoupler with overrunning and belt-start capability with simplified construction |
| CN105960538B (en) | 2014-01-10 | 2019-03-12 | 利滕斯汽车合伙公司 | Decoupler with Overrun and Start Capability |
| US9551275B2 (en) | 2014-08-07 | 2017-01-24 | Caterpillar Inc. | Cooling system having pulsed fan control |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157114A (en) * | 2006-12-25 | 2008-07-10 | Mitsubishi Motors Corp | Vehicle cooling device |
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| CA1332972C (en) * | 1987-12-28 | 1994-11-08 | Yasuyuki Aihara | Cooling control system for internal combustion engines equipped with superchargers |
| WO1992005347A1 (en) * | 1990-09-19 | 1992-04-02 | Drobyshevsky Cheslav Bronislav | Method and device for controlling the thermal condition of an internal combustion engine |
| US7395239B1 (en) * | 1999-07-19 | 2008-07-01 | American Business Financial | System and method for automatically processing loan applications |
| US7379912B1 (en) * | 2000-03-10 | 2008-05-27 | Federal Home Loan Mortgage Corporation | System and method for processing loan information |
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| US9097172B2 (en) * | 2009-09-03 | 2015-08-04 | GM Global Technology Operations LLC | Switchable water pump control systems and methods |
-
2009
- 2009-11-09 GB GB0919561A patent/GB2475105A/en not_active Withdrawn
-
2010
- 2010-11-08 RU RU2010145338/06A patent/RU2536476C2/en not_active IP Right Cessation
- 2010-11-08 US US12/941,863 patent/US20110112742A1/en not_active Abandoned
- 2010-11-09 CN CN2010105456722A patent/CN102052139A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008157114A (en) * | 2006-12-25 | 2008-07-10 | Mitsubishi Motors Corp | Vehicle cooling device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2490935A (en) * | 2011-05-19 | 2012-11-21 | Gm Global Tech Operations Inc | Method of diagnosing cooling pump in an internal combustion engine status and associated control methods |
| US9200581B2 (en) | 2011-05-19 | 2015-12-01 | GM Global Technology Operations LLC | Method for performing on/off diagnosis of a smart cooling pump for an internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2010145338A (en) | 2012-05-20 |
| US20110112742A1 (en) | 2011-05-12 |
| CN102052139A (en) | 2011-05-11 |
| RU2536476C2 (en) | 2014-12-27 |
| GB0919561D0 (en) | 2009-12-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |