GB2461304A - I.c. engine oil supply system with insulated oil storage for improved cold start efficiency - Google Patents
I.c. engine oil supply system with insulated oil storage for improved cold start efficiency Download PDFInfo
- Publication number
- GB2461304A GB2461304A GB0811775A GB0811775A GB2461304A GB 2461304 A GB2461304 A GB 2461304A GB 0811775 A GB0811775 A GB 0811775A GB 0811775 A GB0811775 A GB 0811775A GB 2461304 A GB2461304 A GB 2461304A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- storage container
- engine
- combustion engine
- storage
- 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- Withdrawn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
- 239000003921 oil Substances 0.000 title abstract description 94
- 239000010705 motor oil Substances 0.000 title abstract description 51
- 238000002485 combustion reaction Methods 0.000 abstract description 47
- 238000009413 insulation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/021—Conditioning lubricant for aiding engine starting, e.g. heating by heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
An oil supply system 10 for supplying a combustion engine 12 of a vehicle with motor oil 20 comprises oil storage 18, eg an oil pan 14 with oil sump 16, for providing motor oil 20 to the engine and a thermally insulated oil storage container 32 having greater heat insulation than the oil storage 18. After a cold start the combustion engine 12 may be fed with heated motor oil from the heat insulated storage container 32 to improve cold start efficiency over the life time of the engine. Oil from the oil storage 18 and the storage container 32 may be fed via a valve arrangement 36 to the engine by respective oil pumps 22, 30. The pumps and valve arrangement 36 may be controlled by a control unit 40 in response to sensors 38, eg of level or temperature, in the insulated storage container 32. Alternatively, a single pump and a pair of valves may be provided.
Description
Oil supply and method for operating a combustion engine
Description
The invention relates to an oil supply for supplying an internal combustion engine of a vehicle with motor oil as well as to a method for operating a combustion engine of a vehicle by means of an oil supply.
Internal combustion engines have an optimum operating temperature with respect to efficiency, emissions, wear and others. When after a longer time without operation a cold combustion engine is started ("cold start") the efficiency of the combustion engine is poor in comparison to the efficiency of the combustion engine at operating temperature.
It is the object of the invention to provide an oil supply as well as a method of operating a combustion engine, by means of which an improved cold start efficiency over the life time of the combustion engine is provided which particularly improves cold start efficiency.
The solution of the object is achieved by an oil supply comprising the features of claim 1 as well as by a method of operating a combustion engine comprising the features of claim 13. Preferred embodiments are given by the dependent claims.
The oil supply according to the invention for supplying a combustion engine of a vehicle with motor oil comprises an oil storage for providing motor oil, for instance a sump of an oil pan of the combustion engine.
According to the invention a thermally insulated storage container is provided for storing heated motor oil, wherein the storage container comprises a greater heat insulation than the oil storage.
Since the oil storage is not heat insulated a sufficient cooling of the motor oil during normal operation conditions is ensured. Due to the heat insulated storage container heated motor oil can be stored during and/or after operation of the combustion engine and kept at a higher temperature than the other motor oil over a long period of time. By means of the heat insulated storage container even after a longer time of for example one or two days relatively hot oil can be supplied to the engine immediately after cold start.
Further it is possible to mix the warm motor oil from the storage container with the cold motor oil of the oil storage providing an increased overall temperature of the motor oil at once after the start of the combustion engine. Due to the lower viscosity of the warmer engine oil from the insulated storage, friction of the engine after cold start is greatly reduced which leads to lower fuel consumption and CO2 emissions.
Particularly the heated motor oil stored by the storage container comprises a temperature Tc and the motor oil stored by the oil storage comprises a temperature T, wherein it is T �= Ts, particularly after a stop and/or before a start of the combustion engine.
Ideally, the insulated storage container should be filled with as hot as possible engine oil. Typically, engine oil is pumped into the insulated storage container once the engine is switched off. However, in case actual engine oil temperature gets significantly hotter than normal operating temperature, it may be preferred to fill and trap engine oil before the engine is switched off.
Preferably the oil storage and the insulated oil container are connectable via a valve assembly to the combustion engine, wherein the valve assembly is adapted to supply the combustion engine after a cold start of the combustion engine from the storage container. The valve assembly serves particularly the following functions: 1) after shut down of the engine, the valve assembly allows the flow of hot engine oil from the internal combustion engine into the insulated storage container; 2) once the insulated storage container is filled with hot engine oil, the valve assembly closes the connection to the engine in order to minimize heat loss; and 3) at cold start, the valve assembly allows flow of the hot engine oil from the insulated storage vessel to the engine.
Particularly a first oil pump for feeding the combustion engine from the oil storage and a second oil pump for feeding the combustion engine from the storage container are provided. Particularly the second oil pump is further used for at least partially filling the insulated storage container. Since the first oil pump is provided for permanent operation and the second oil pump is provided for short operation, particularly in two different directions, it is possible to provide for each operation mode of the oil supply an adequate designed oil pump.
In a preferred embodiment an oil pan for connecting to a motor block of the combustion engine is provided, wherein the oil pan comprises an oil sump, which comprises the oil storage. Particularly the oil pan comprises the storage container. The storage container may be a separated heat insulated compartment of the oil pan. This facilitates to provide an existing combustion engine design with the heat insulated storage container.
Further the storage container may be easily press fitted into the oil sump of the oil pan.
Particularly the insulated storage container may comprises only one opening for filling and emptying the insulated storage container. Since the same opening is used for filling and emptying the storage container, additional openings are not necessary. This leads to good heat insulation since a perforation of a provided heat insulation layer is reduced to a minimum.
Particularly the storage container may comprises a heater for heating motor oil inside the storage container. Even after a long standing of the combustion engine it is possible to provide preheated motor oil by means of the heater for the cold start. Further is possible to prevent a too low temperature of the motor oil inside the storage container.
Preferably a control unit for controlling the feed from the oil storage and/or from the storage container to the combustion engine is provided, wherein the control unit particularly controls the valve assembly and/or the oil pump(s). The control unit may be connected to a level sensor and/or a temperature sensor and/or other kind of applicable sensor of the insulated storage container and/or the oil storage. By means of the control unit it is possible to adjust the motor oil flow to and/or from the combustion engine. The control unit may detect the correct situation to feed the combustion engine from the storage container or from the oil storage and may adjust the relevant valves. -.5-
Particularly an oil duct connected to the oil storage for supplying motor oil from the oil storage to the combustion engine and a return duct connected to the oil storage for leading motor oil from the combustion engine to the oil storage are provided, wherein the insulated storage container is connected to the oil storage and/or the oil duct and/or the return duct.
Particularly the return duct may comprise engine parts to be lubricated. Thus, the insulated storage container may be connected for filling and/or emptying with the ducts of an engine oil loop, which is present for the normal operation mode of the combustion engines. A part of the oil duct and/or of the return duct may be used for leading motor oil to and/or from the insulated storage container. This reduces the overall length of the provided ducts. The building space is not significantly affected.
The invention further relates to a method for operating a combustion engine of a vehicle, particularly by means of an oil supply, which may be designed as previously described. According to the invention during operation of the combustion engine and/or after stopping the combustion engine a heat insulated storage container is at least partially filled with heated motor oil coming from the combustion engine and the combustion engine is fed from the insulated storage container with motor oil directly on or after the start of the combustion engine.
By means of the heat insulated storage container even after a longer time of for example one or two days heated motor oil is present at once without the need to heat the motor oil prior. After the cold start the combustion engine may be fed with heated motor oil from the heat insulated storage container. Thus, an improved cold start efficiency over the life time of the combustion engine is provided, which leads in turn to a C02-reduction of the combustion engine.
These and other aspects of the invention will be apparent from and elucidated with reference to a preferred embodiment described hereinafter.
In the drawings: Fig. 1 is a schematic conceptual view of an oil supply according to the invention.
The oil supply 10 for feeding a combustion engine 12 comprises an oil pan 14. The oil pan 14 is part of the combustion engine 12 and comprises an oil sump 16, which provides an oil storage 18 for motor oil 20. By means of a first oil pump 22 the motor oil 20 of the oil storage 18 may be suppliedled via an oil duct 24 to certain parts 26 of the combustion engine 12 for lubrication. From the parts 26 the engine oil drips to the oil storage 18 of the oil sump 16. Due to the oil duct 24 and the parts 26 of the return duct of the engine that get lubricated 26 an engine oil loop 28 is provided, which is closed via the oil storage 18 of the oil pan 14.
By means of a second oil pump 30 hot motor oil 20 from the oil sump 16 or any other convenient part of the engine 12 may be led trough an opening 31 to a storage container 32, which is thermally insulated by a thermal insulating layer 34. In order to connect and disconnect the storage container 32 to the engine oil loop 28 a valve assembly 36 is provided. For feeding the combustion engine 12 at a cold start with motor oil of a higher temperature the second oil pump 30 feeds the warm motor oil from the heat insulated storage container 32 through the same opening 31 via the valve assembly 36 downstream the first oil pump 22 to the oil duct 24 of the engine oil ioop 28, so that the combustion engine 12 is fed with warm motor oil. Alternatively, the hot engine oil from the insulated storage container may be fed up-stream the first oil pump 22 or in the oil storage 18. In the illustrated embodiment two different oil pumps 22, 30 are provided, wherein the second oil pump 30 is adapted to operate in two different directions, so that the second oil pump 30 is sufficient to fill and deplete the storage container 32.
In an alternate embodiment of the oil supply 10 the valve assembly 36 may comprise a first valve for connecting either the storage container 32 or the oil storage 18 positioned in the return duct 26 and/or upstream the first oil pump 22 in the oil duct as well as a second valve for connecting either the storage container 32 or the oil storage 18 positioned downstream the first oil pump 22 in the oil duct. In this embodiment a single oil pump 22 is sufficient to fill and deplete the storage container 32 as well as for the normal operation mode with a disconnected storage container 32.
The storage container 32 may comprise one or more sensors 38, by means of which the level of the storage container 32 and/or the temperature and/or any other applicable parameter of the filled motor oil may be detected. TheseThis information areis processed by a control unit 40 for adjusting the second oil pump 30 and/or the valve assembly 36. For instance, when the sensor 38 detects that the storage container 32 is nearly full, the control unit 40 may close via the valve assembly 36 the feed to the storage container 32.
Reference signs oil supply 12 combustion engine 14 oil pan 16 oil sump 18 Oil storage motor oil 22 first oil pump 24 oil duct 26 engine parts to be lubricated, return duct 28 engine oil loop second oil pump 31 opening 32 storage container 34 heat insulating layer 36 valve assembly 38 sensor control unit
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0811775A GB2461304A (en) | 2008-06-27 | 2008-06-27 | I.c. engine oil supply system with insulated oil storage for improved cold start efficiency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0811775A GB2461304A (en) | 2008-06-27 | 2008-06-27 | I.c. engine oil supply system with insulated oil storage for improved cold start efficiency |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0811775D0 GB0811775D0 (en) | 2008-07-30 |
| GB2461304A true GB2461304A (en) | 2009-12-30 |
Family
ID=39683250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0811775A Withdrawn GB2461304A (en) | 2008-06-27 | 2008-06-27 | I.c. engine oil supply system with insulated oil storage for improved cold start efficiency |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2461304A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014036761A1 (en) * | 2012-09-05 | 2014-03-13 | 安徽江淮汽车股份有限公司 | Method and system for cold-starting flexible fuel automobile |
| WO2014072527A1 (en) * | 2012-11-12 | 2014-05-15 | Webasto SE | Preheating apparatus and method for installing a preheating apparatus |
| CN108979782A (en) * | 2017-05-31 | 2018-12-11 | 丰田自动车株式会社 | The oil circulation device of internal combustion engine |
| DE102019112370A1 (en) * | 2019-05-13 | 2020-11-19 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine with a lubricant circuit |
| US11092047B2 (en) | 2016-09-29 | 2021-08-17 | Ford Global Technologies, Llc | Oil supply unit and motor vehicle |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2285720A (en) * | 1941-05-19 | 1942-06-09 | Charles A Crawford | Device for retaining heat in motor oil |
| FR2503260A1 (en) * | 1981-04-02 | 1982-10-08 | Valeo | energy saving thermal reservoir for engine oil and water - uses two-compartment insulated reservoir with release valves operated in starting sequence to reduce cold engine losses |
| DE3215342A1 (en) * | 1982-04-24 | 1983-10-27 | Peter Dr. 8000 München Haslbeck | Storage of heat from the cooling medium and engine oil on internal combustion engines |
| DE3341097A1 (en) * | 1983-11-12 | 1985-05-23 | Volkswagenwerk Ag, 3180 Wolfsburg | Internal combustion engine for vehicles, in particular passenger vehicles |
| CH654876A5 (en) * | 1983-04-18 | 1986-03-14 | Sven Arild Swallert | Method for recovering part of the heat energy released by an internal combustion engine for the purpose of facilitating cold starting thereof, and device for implementing it |
| SE505374C2 (en) * | 1995-11-23 | 1997-08-18 | Beta Maskin Ab | Hot coolant storage, sump heating and thermal insulation for IC engine of motor vehicle |
| CA2279711A1 (en) * | 1999-08-06 | 2001-02-06 | Luiz Claudio Vieira Fernandes | Pneumatic system for storing engines hot oil in cold weather |
| CA2284240A1 (en) * | 1999-09-16 | 2001-03-16 | Luiz Claudio Vieira Fernandes | Pneumatic system for storing engine hot oil for cold start |
| JP2003148120A (en) * | 2001-11-15 | 2003-05-21 | Aisin Seiki Co Ltd | Lubricating device for internal combustion engine |
| DE10300411A1 (en) * | 2003-01-09 | 2004-07-22 | Harald Gasse | Hot oil management system for IC engine has a dry sump with hot oil stored in a thermally insulated reservoir and pumped to specific sites on start up |
-
2008
- 2008-06-27 GB GB0811775A patent/GB2461304A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2285720A (en) * | 1941-05-19 | 1942-06-09 | Charles A Crawford | Device for retaining heat in motor oil |
| FR2503260A1 (en) * | 1981-04-02 | 1982-10-08 | Valeo | energy saving thermal reservoir for engine oil and water - uses two-compartment insulated reservoir with release valves operated in starting sequence to reduce cold engine losses |
| DE3215342A1 (en) * | 1982-04-24 | 1983-10-27 | Peter Dr. 8000 München Haslbeck | Storage of heat from the cooling medium and engine oil on internal combustion engines |
| CH654876A5 (en) * | 1983-04-18 | 1986-03-14 | Sven Arild Swallert | Method for recovering part of the heat energy released by an internal combustion engine for the purpose of facilitating cold starting thereof, and device for implementing it |
| DE3341097A1 (en) * | 1983-11-12 | 1985-05-23 | Volkswagenwerk Ag, 3180 Wolfsburg | Internal combustion engine for vehicles, in particular passenger vehicles |
| SE505374C2 (en) * | 1995-11-23 | 1997-08-18 | Beta Maskin Ab | Hot coolant storage, sump heating and thermal insulation for IC engine of motor vehicle |
| CA2279711A1 (en) * | 1999-08-06 | 2001-02-06 | Luiz Claudio Vieira Fernandes | Pneumatic system for storing engines hot oil in cold weather |
| CA2284240A1 (en) * | 1999-09-16 | 2001-03-16 | Luiz Claudio Vieira Fernandes | Pneumatic system for storing engine hot oil for cold start |
| JP2003148120A (en) * | 2001-11-15 | 2003-05-21 | Aisin Seiki Co Ltd | Lubricating device for internal combustion engine |
| DE10300411A1 (en) * | 2003-01-09 | 2004-07-22 | Harald Gasse | Hot oil management system for IC engine has a dry sump with hot oil stored in a thermally insulated reservoir and pumped to specific sites on start up |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014036761A1 (en) * | 2012-09-05 | 2014-03-13 | 安徽江淮汽车股份有限公司 | Method and system for cold-starting flexible fuel automobile |
| WO2014072527A1 (en) * | 2012-11-12 | 2014-05-15 | Webasto SE | Preheating apparatus and method for installing a preheating apparatus |
| US11092047B2 (en) | 2016-09-29 | 2021-08-17 | Ford Global Technologies, Llc | Oil supply unit and motor vehicle |
| CN108979782A (en) * | 2017-05-31 | 2018-12-11 | 丰田自动车株式会社 | The oil circulation device of internal combustion engine |
| DE102019112370A1 (en) * | 2019-05-13 | 2020-11-19 | Bayerische Motoren Werke Aktiengesellschaft | Internal combustion engine with a lubricant circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0811775D0 (en) | 2008-07-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S30Z | Assignments for licence or security reasons |
Free format text: APPLICANT GM GLOBAL TECHNOLOGY OPERATIONS, INC SECURITY TO THE UNITED STATES DEPARTMENT OF THE TREASURY |
|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |