GB2620954A - An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for - Google Patents
An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for Download PDFInfo
- Publication number
- GB2620954A GB2620954A GB2210954.0A GB202210954A GB2620954A GB 2620954 A GB2620954 A GB 2620954A GB 202210954 A GB202210954 A GB 202210954A GB 2620954 A GB2620954 A GB 2620954A
- Authority
- GB
- United Kingdom
- Prior art keywords
- oil
- combustion engine
- circuit
- feed system
- reservoir
- 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- Withdrawn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
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims description 20
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 238000005461 lubrication Methods 0.000 claims abstract description 10
- 238000005086 pumping Methods 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 abstract description 11
- 239000003921 oil Substances 0.000 description 113
- 239000010705 motor oil Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006837 decompression Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction 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
- 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
- F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/18—Propelling the vehicle
- B60W30/18009—Propelling the vehicle related to particular drive situations
- B60W30/18018—Start-stop drive, e.g. in a traffic jam
-
- 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
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0814—Circuits or control means specially adapted for starting of engines comprising means for controlling automatic idle-start-stop
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
An oil feed system (70 Fig. 1) for a motor vehicle combustion engine (10 Fig.1) has an oil circuit 12 with an oil accumulator/reservoir 16a, 16b, that supplies oil to the engine when an oil pump 18 is switched off, for example during an engine stop-start control arrangement. The oil accumulator/reservoir includes a mechanical tension mechanism (20 Fig. 1) for pumping the oil 26 through the circuit, and the oil accumulator/reservoir is located either directly before or directly after an oil filter 22, when viewed in the direction of oil flow in the oil circuit. The mechanical tension mechanism may include a spring (28 Fig 1), and the accumulator/reservoir can be filled with oil when the engine is in an on-state and under running conditions. The oil circuit may feed oil to an oil gallery 30, a cylinder block 32, a crankcase 34, a turbocharger 50, etc, for lubrication of at least one moving part, and the oil circuit may include a strainer 38, a pressure relief valve 36 and an oil sump 40. The arrangement avoids a lack of oil lubricant condition which may occur during engine restart when oil circulation is not yet at target operation levels.
Description
An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for a combustion engine during start stop function of a motor vehicle
FIELD OF THE INVENTION
[0001] The present invention relates to the field of automobiles. More specifically, the present invention relates to an oil feed system for a combustion engine for a motor vehicle as well as to a corresponding method for operating an oil feed system for a combustion engine during start stop operation.
BACKGROUND INFORMATION
When a combustion engine is off during the start/stop function, the oil pump ceases functioning and stops the flow of lubricant to rotating components. The engine may experience increased wear during the initial start-up function due to poor lubrication/low oil pressure, which may be multiplied by modern vehicles start/stop functions. For example, the lack of oil lubricant condition may occur during engine restart while oil circulation is not yet at target operation levels.
SUMMARY OF THE INVENTION
[0002] It is an object of the present invention to provide an oil feed system for a combustion engine as well as a corresponding method, by which a better operating approach of the combustion engine may be realized.
[0003] This object is solved by an oil feed system for a combustion engine as well as a method for operating an oil feed system for the combustion engine according to the independent claims. Advantageous embodiments are presented in the dependent claims.
[0004] One aspect of the present invention relates to an oil feed system for a combustion engine for a motor vehicle, the oil feed system may include at least one oil circuit for lubrication of at least one moving part of the combustion engine, wherein the oil circuit may include an oil reservoir and an oil pump for pumping the oil through the oil circuit, and wherein the oil reservoir may include a mechanical tension mechanism for pumping the oil through the circuit in a tensioned state of the mechanical tension mechanism during an off-state of the oil pump.
[0005] In an embodiment, the oil reservoir may be arranged directly before an oil filter of the oil circuit or directly after the oil filter viewed in the direction of a flow of the oil in the oil circuit.
[0006] Therefore, an integration of an oil reservoir within an existing oil circuit is provided, wherein the oil reservoir may fill by oil pressure during regular engine operation and may disperse the oil through the circuit or directly to a lubrication surface when the engine is off. This may be done to maintain lubrication of critical surfaces during engine start/stop events.
[0007] The proposed solution includes various possible locations for the engine off oil feed and several process steps for operating the oil feed system as already mentioned. Benefits may include decreased lifetime wear on sliding surface interface components within the combustion engine. The proposed solution may prolong oil feed after the oil pump is off and may act as pre-lubricant for the next engine start-up which may reduce the wear on components through enhanced lubrication leading to a reduction in the risk of engine damage and prolongation of the engine life.
[0008] According to an embodiment, the mechanical tension mechanism may be provided at least in part as a spring.
[0009] In another embodiment, the oil is provided by the mechanical tension mechanism during an off-state of the combustion engine [0010] In yet another embodiment, the tension of the mechanical tension mechanism may be generated by the oil pump during the on-state of the oil pump.
[0011] Another aspect of the present invention relates to a motor vehicle comprising the oil feed system for the combustion engine according to the present invention.
[0012] Furthermore, the present invention relates to a method for operating an oil feed system for a combustion engine according to the preceding aspect. The method may include the steps of generating a tension of a mechanical tension mechanism of an oil reservoir of an oil circuit of the combustion engine by an oil pump of the oil circuit during an on-state of the combustion engine, providing oil from the oil reservoir to at least one moving part of the combustion engine by releasing the tension of the mechanical tension mechanism during an off-state of the combustion engine and generating the tension of the mechanical tension mechanism by the oil pump during a restart of the combustion engine.
[0013] Advantageous forms of the oil feed system for the combustion engine are to be regarded as advantageous forms of the motor vehicle as well as of the method. In particular, the method, the oil feed system, the combustion engine, and the motor vehicle may include a means for performing the method.
[0014] Further advantages, features, and details of the present invention derive from the following description of preferred embodiments as well as from the drawings. The features and feature combinations previously mentioned in the description as well as the features and feature combinations mentioned in the following description of the figures and/or shown in the figures alone can be employed not only in the respectively indicated combination but also in any other combination or taken alone without leaving the scope of the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The novel features and characteristic of the disclosure are set forth in the appended claims. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate exemplary embodiments and together with the description, serve to explain the disclosed principles. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system and/or methods in accordance with embodiments of the present subject matter are now described below, by way of example only, and with reference to the accompanying figures.
[0016] The drawings show in: [0017] Fig. 1 a schematic view according to an embodiment of an oil feed system of a combustion engine according to an embodiment the present invention; [0018] Fig. 2 a schematic diagram of a circuit of a combustion engine according to an embodiment of the present invention; and [0019] Fig. 3 a schematic flow chart according to an embodiment of the method..
[0020] In the figures the same elements or elements having the same function are indicated by the same reference signs.
DETAILED DESCRIPTION
[0021] In the present document, the word "exemplary" is used herein to mean "serving as an example, instance, or illustration". Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
[0022] While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and will be described in detail below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure.
[0023] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion so that a setup, device or method that comprises a list of components or steps does not include only those components or steps but may include other components or steps not expressly listed or inherent to such setup or device or method. In other words, one or more elements in a system or apparatus preceded by "comprises" or "comprise" does not or do not, without more constraints, preclude the existence of other elements or additional elements in the system or method.
[0024] In the following detailed description of the embodiment of the disclosure, reference is made to the accompanying drawings that form part hereof, and in which is shown by way of illustration a specific embodiment in which the disclosure may be practiced. This embodiment is described in sufficient detail to enable those skilled in the art to practice the disclosure, and it is to be understood that other embodiments may be utilized and that changes may be made without departing from the scope of the present disclosure. The following description is, therefore, not to be taken in a limiting sense.
[0025] In particular, the combustion engine 10 (Fig. 1) may experience increased wear during the initial start-up due to a brief moment of poor lubrication, which may be multiplied by modern vehicle start/stop functions. When the combustion engine 10 is off during the start/stop function, the oil pump 18 (Fig. 2) may cease functioning and stop the flow of lubricant to rotating components. During the restart of the combustion engine 10, while oil circulation is provided throughout lubricant channels, rotating components are briefly lacking supply of all lubricant. The present invention may prolong the oil feed after the oil pump 18 is off and act as a pre-lubricant for the next engine start-up, which may reduce wear on components through enhanced lubrication leading to a decrease in risk of engine damage and prolonged system life.
[0026] Fig. 1 shows a schematic view according to an embodiment of an oil feed system 70 of a combustion engine 10 of a motor vehicle (not shown). The oil feed system 70 may include at least one oil circuit 12 for lubrication of at least one moving part 14, for example one cylinder of the combustion engine 10. The oil circuit 12 may include an oil reservoir 16a, 16b (Fig. 2) and an oil pump 18 (Fig. 2) for pumping the oil 26 (Fig. 2) through the oil circuit 12.The oil reservoir 16a, 16b may include a mechanical tension mechanism 20 for pumping the oil 26 through the circuit 12 in a tensioned state of the mechanical tension mechanism 20 during an off-state of the oil pump 18. In particular, as shown in Fig. 1, the mechanical tension mechanism 20 may be provided at least in part as a spring 28.
[0027] The oil feed system 70 may be applied in an engine circuit. Fig. 2 shows a schematic diagram of an engine circuit according to an embodiment of the present invention. In particular, Fig. 2 shows that the oil reservoir 16a, 16b may be arranged directly before an oil filter 22, which is shown with a first oil reservoir 16a, or directly after the oil filter 22, which is shown with a second oil reservoir 16b, in the direction of a flow 24 of the oil 26 in the oil circuit 12.
[0028] In particular, according to another embodiment, the oil 26 is provided by the mechanical tension mechanism 20 during an off-state of the combustion engine 10 and, during an on-state of the oil pump 18, the tension of the mechanical tension mechanism is generated by the oil pump 18. In some embodiments, the mechanical tension mechanism 20 may be a spring 28.
[0029] Furthermore, Fig. 2 shows that the engine circuit may include the oil circuit 12, an oil gallery 30, a cylinder block consumer 32, a crank case 34, and an oil pressure relief valve 36. Furthermore, a strainer 38 as well as an oil sump 40 may be provided. In particular, the oil gallery may include a thermometer 42 as well as an oil pressure sensor 44. The oil pump 18 may be connected to a heat exchanger 46, and the heat exchanger 46 may be connected to a bypass valve 48 which may be connected to a turbocharger 50. The turbocharger 50 may be connected to the cylinder head consumer 52, where the cylinder head consumer 52 may be connected with the oil gallery 30.
[0030] Additionally, Fig. 2 shows that the engine circuit may include a catalyst 54 as well as a bypass flap valve 56 and a muffler 58. Furthermore, an EGR (Exhaust Gas Recirculation) valve 60 may be included as shown. The heat exchanger 46 may be connected to the muffler 58 and to EGR valve 60. Furthermore, the crank case 34 may be connected with the EGR valve 60.
[0031] In particular, this engine circuit may include an exhaust outlet 64 circuit, where the muffler 58 may be connected to a tail pipe 62. An exhaust inlet 66 may be connected to the bypass flap valve 56 and then to the heat exchanger 46. Furthermore, the exhaust inlet 66 may be connected to the cylinder heat consumer 52 and to the turbocharger 50. The turbocharger 50 may be connected to the catalyst 52 and the bypass flap valve 56 may be connected via a bypass to the muffler 58 and the exhaust outlet 64. Furthermore, the engine circuit may include an intake air 68 as shown.
[0032] Fig. 2 also shows the internal/external reservoir 16a, 16b within the lubricant system which may be provided, to serve as a container for oil feed while the combustion engine 10 and the oil pump 18 is turned off. During engine operation, a pressure may be generated by the oil pump 18, and the pressure from the oil pump 18 may drive the lubricant into the reservoir 16a, 16b and subsequently forces compression of the spring 28 and expanding of the surface. While the combustion engine 10 is off, the low oil pressure in the system may cause the spring 28 to expand, which provides the oil 26 throughout the lubricant channels.
[0033] Providing the oil 26 to the rotating components of the combustion engine 10 may be implemented in the engine circuit as shown in Fig. 2, and in an alternative embodiment, the engine circuit may include a different configuration. The method steps to implement the oil feed system 70 in an engine circuit are shown in Fig. 3.
[0034] Fig. 3 shows a schematic flow chart according to an embodiment of the method according to an embodiment of the present invention. In particular, Fig. 3 shows that in a first step Si, an oil inlet may be provided. The engine oil 26 may flow as the combustion engine 10 is on. The oil 26 may be fed into the reservoir 16a, 16b and may compress the spring 28. In the second step S2, the engine may stop, and the oil 26 may flow through outlet in the oil circuit 12. For example, the engine oil 26 flows out of the reservoir 16a, 16b due to the decompression of the spring 28 and feeds the oil circuit 12.
[0035] In a third step S3, the combustion engine 10 may restart. When the combustion engine 10 restarts, the oil 26 may flow through the inlet of the oil circuit 12, wherein the engine oil 26 flows into the reservoir 16a, 16b again. In particular, the oil 26 may compress the spring 28. In a different embodiment, the oil 26 may compress a different tension mechanism. In a fourth step S4, the combustion engine 10 may stops, and the engine oil 26 flows out of the reservoir 16a, 16b due to decompression of the spring 28 and feeds the oil circuit 12.
Reference Signs combustion engine 12 oil circuit 14 moving part 16a first reservoir 16b second reservoir 18 oil pump mechanical tension mechanism 22 oil filter 24 flow 26 oil 28 spring oil gallery 32 cylinder block consumer 34 crank case 36 oil pressure relief valve 38 strainer oil sump 42 thermometer 44 oil pressure sensor 46 heat exchanger 48 bypass valve turbocharger 52 cylinder head consumer 54 catalyst 56 bypass flap valve 58 muffler EGR valve 62 tailpipe 64 exhaust outlet 66 exhaust inlet 68 intake air oil feed system Si -S4 steps of the method
Claims (5)
- CLAIMS1. An oil feed system (70) for a combustion engine (10) for a motor vehicle, comprising at least one oil circuit (12) for lubrication of at least one moving part (14) of the combustion engine (10), wherein the oil circuit (12) comprises an oil reservoir (16a, 16b) and an oil pump (18) for pumping oil (26) through the oil circuit (12), and wherein the oil reservoir (16a, 16b) comprises a mechanical tension mechanism (20) for pumping the oil (26) through the circuit (12) in a tensioned state of the mechanical tension mechanism (20) during an off-state of the oil pump (18), characterized in that the oil reservoir (16a, 16b) is arranged directly before an oil filter (22) of the oil circuit (12) or directly after the oil filter (22) viewed in the direction of a flow (24) of the oil (26) in the oil circuit (12).
- 2. The oil feed system (70) according to claim 1, characterized in that the mechanical tension mechanism (20) is provided at least in part as a spring (28).
- 3. The oil feed system (70) according to claim 1 or 2, characterized in that the oil (26) is provided by the mechanical tension mechanism (26) during an off-state of the combustion engine (10).
- 4. The oil feed system (70) according to any one of claims 1 to 3, characterized in that during the on-state of the oil pump (18), the tension of the mechanical tension mechanism (26) is generated by the oil pump (18).
- 5. A method for operating an oil feed system (7) of a combustion engine (10) according to any one of claims 1 to 4, comprising the steps of: - generating a tension of a mechanical tension mechanism (26) of an oil reservoir (16a, 16b) of an oil circuit (12) of the combustion engine (10) by an oil pump (18) of the oil circuit (12) during an on-state of the combustion engine (10); (Si) - providing oil (26) from the oil reservoir (16a, 16b) at least to one moving part (14) of the combustion engine (10) by releasing the tension of the mechanical tension mechanism (26) during an off-state of the combustion engine (10); (S2) and - generating the tension of the mechanical tension mechanism (26) by the oil pump (18) during a restart of the combustion engine (10). (S3)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2210954.0A GB2620954A (en) | 2022-07-27 | 2022-07-27 | An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for |
| DE102023002977.7A DE102023002977A1 (en) | 2022-07-27 | 2023-07-21 | Oil supply system for an internal combustion engine during a start-stop function of a motor vehicle and method for operating an oil supply system for an internal combustion engine during the start-stop function of a motor vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2210954.0A GB2620954A (en) | 2022-07-27 | 2022-07-27 | An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202210954D0 GB202210954D0 (en) | 2022-09-07 |
| GB2620954A true GB2620954A (en) | 2024-01-31 |
Family
ID=84540310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2210954.0A Withdrawn GB2620954A (en) | 2022-07-27 | 2022-07-27 | An oil feed system for a combustion engine during start stop function of a motor vehicle, as well as a method for operating an oil feed system for |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE102023002977A1 (en) |
| GB (1) | GB2620954A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63195310A (en) * | 1987-02-10 | 1988-08-12 | Toyota Motor Corp | Lubricating device for internal combustion engine |
| US5197424A (en) * | 1992-03-05 | 1993-03-30 | Blum Kenneth J | Pre-lubrication system for reducing engine wear |
| US5589059A (en) * | 1995-06-07 | 1996-12-31 | Semar; James E. | Oil filter adapter system incorporating an accessible filter element |
| US5655495A (en) * | 1996-10-08 | 1997-08-12 | Richards; John E. | Pre-start engine oiler |
| US20100284823A1 (en) * | 2009-05-05 | 2010-11-11 | Gm Global Technology Operations, Inc. | Oil pressure control in an engine |
| WO2011159143A2 (en) * | 2010-06-14 | 2011-12-22 | Granados Copca Jose | Pre-lubrication system for internal combustion engines |
-
2022
- 2022-07-27 GB GB2210954.0A patent/GB2620954A/en not_active Withdrawn
-
2023
- 2023-07-21 DE DE102023002977.7A patent/DE102023002977A1/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63195310A (en) * | 1987-02-10 | 1988-08-12 | Toyota Motor Corp | Lubricating device for internal combustion engine |
| US5197424A (en) * | 1992-03-05 | 1993-03-30 | Blum Kenneth J | Pre-lubrication system for reducing engine wear |
| US5589059A (en) * | 1995-06-07 | 1996-12-31 | Semar; James E. | Oil filter adapter system incorporating an accessible filter element |
| US5655495A (en) * | 1996-10-08 | 1997-08-12 | Richards; John E. | Pre-start engine oiler |
| US20100284823A1 (en) * | 2009-05-05 | 2010-11-11 | Gm Global Technology Operations, Inc. | Oil pressure control in an engine |
| WO2011159143A2 (en) * | 2010-06-14 | 2011-12-22 | Granados Copca Jose | Pre-lubrication system for internal combustion engines |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102023002977A1 (en) | 2024-02-01 |
| GB202210954D0 (en) | 2022-09-07 |
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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) |