• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a combustion engine of V-type. The combustion engine (2) comprises cylinders (3) arranged in a first bank (4) and cylinders arranged in a second bank (5) of the combustion engine (2), and a coolant passage directing coolant through the combustion engine (2). The coolant passage comprises an inlet channel (15) which is arranged in a space between the banks (4, 5) of the combustion engine (2) and configured to receive coolant from an engine inlet line (6) and direct it to cylinder circuit (21-23) in which the coolant cools the respective cylinders (3), and an outlet channel (18) configured to receive coolant from the respective cylinder circuits (21-23) and direct it to an engine outlet line (8). The outlet channel (18) is arranged in an engine block of the combustion engine (2) in a position midway between the first bank (4) and the second bank (5) and below the inlet channel (15).(Fig. 2)
    公开号:SE1651066A1
    申请号:SE1651066
    申请日:2016-07-15
    公开日:2018-01-16
    发明作者:Ekman Mats
    申请人:Scania Cv Ab；
    IPC主号:
    专利说明:

    A combustion engine of V-type BACKGROUND OF THE INVENTION AND PRIOR ART The present invention relates to a combustion engine of V-type according to the preamble of claim l.
    A conventional combustion engine of V-type comprises a first set of cylindersarranged in a first bank on a side of the engine and a second set of cylinders arrangedin a second bank on an opposite side of the engine. The combustion engine comprisesa coolant passage for a coolant circulating in a cooling system. The coolant passagemay comprise an inlet channel that directs coolant to the respective cylinders. The inletchannel may be located in a space between the banks. The coolant is directed from theinlet channel to cylinder circuits for cooling of the individual cylinders. The coolantleaving the respective cylinder circuits is received in an outlet channel. The outletchannel is usually formed as a rail having an extension on the outside of and around alarge part the combustion engine. Such a design of the outlet rail may results in anunbalanced coolant floW due to the different floW distances for the coolant from therespective cylinders to the outlet port of the rail. Further, an externally arranged outletrail requires a mounting space and it adds Weight to the combustion engine.Furthermore, such an outlet rail has a number of sealing surfaces With potential risk for leakage of the coolant from the cooling system.
    DE 40 Ol 140 shows a cylinder block for a liquid cooled combustion engine of V-type.An inlet channel directs coolant to the cylinders and an outlet channel receives coolantfrom the cylinders. Said channels are arranged side by side in the intemal free V-angleof the cylinder block With a covering lid. Thus, the inlet channel and the outlet channelare each arranged closer to one of the banks than the other bank. As a consequence, theinlet coolant channel has to direct coolant to each cylinder in one of the banks via atransverse coolant passage extending past the outlet coolant channel. In acorresponding manner, the outlet coolant channel has to receive coolant from thecylinders in one of the banks via a transverse coolant passage extending past the inletcoolant channel. Such a design increase the floW resistance of the coolant in the combustion engine.
    SUMMARY OF THE INVENTION The object of the present invention is to provide a combustion engine of V-type havingbalanced cylinders flow. Another object is to provide an outlet channel which does not add Weight to the combustion engine.
    The above mentioned object is achieved by the combustion engine according to thecharacterizing part of claim l. Thus, the outlet channel is arranged in the engine blockin a position rr1idway between the first bank and the second bank. Such a design makesit possible to direct coolant from the respective cylinders to the outlet channel via flowpassages of the same length and provide a substantially similar balanced flow rate fromall cylinders to the outlet channel. As a consequence, the flow rate through thecylinders does not need to be dimensioned to the cylinder having the lowest flow rate.Thus, it is not necessary to pump a too high flow rate through some cylinders in orderto provide a required cooling of a cylinder with the lowest flow rate. Since the outletchannel is arranged inside the engine block of the combustion engine, the coolant mayprovide an increased cooling of the combustion engine. Thus, it is possible to obtain arequired cooling of the cylinders with a lower coolant flow and a reduced pump work.Furthermore, an outlet channel arranged integrated in the engine block does not addweight to the combustion engine. In case the outlet channel is casted in the engineblock, the weight of the engine block may be reduced. With the integrated inlet andoutlet channels in the engine block there is few sealing surfaces which minin1izes risk for leakage.
    According to an embodiment of the invention, the outlet channel has an extensionalong substantially the entire length of the combustion engine. In this case, the outletchannel has ability to receive coolant from all cylinders in the respective banks of thecombustion engine via short flow passages of equal length. The outlet channel mayhave a straight extension along its entire length. ln this case, the flow resistance in the outlet channel will be very low.
    According to an embodiment of the invention, the outlet channel may be divided intotwo longitudinal channel parts. The load on the engine block may be high duringoperation of the combustion engine. To divide the outlet channel into two parallel parts may increase the strength of the engine block. In this case, a first channel part may receive coolant from the cylinders in the first bank and a second channel part mayreceive coolant from the cylinders in the second bank and the outlet floWs may join in an outlet section.
    According to an embodiment of the invention, the inlet channel may have an extensionalong substantially the entire length of the combustion engine. The inlet channel andthe outlet channel may have the same length. In this case, the inlet channel has abilityto direct coolant to all cylinders of the combustion engine via short floW passages ofequal length. The inlet channel may have a straight extension along its entire length. ln this case, the floW resistance in the inlet channel Will be very low.
    According to an embodiment of the invention, the inlet channel is connected to theengine inlet line and the outlet channel is connected to the engine outlet line at thesame side of the combustion engine. ln case the combustion engine is cooled bycoolant in a cooling system Which only cools the combustion engine, it is usuallysuitable to connect the engine inlet line to the inlet channel and the engine outlet line tothe outlet channel on the side of the combustion engine located closest to a radiator inthe cooling system in order to rninimize the length of the lines of the cooling system.Alternatively, the inlet channel may be connected to the engine inlet line and the outletchannel may be connected to the engine outlet line on opposite sides of the combustionengine. ln case the cooling system cools a further object in addition to the combustionengine, it is usually suitable to connect the outlet channel to an engine outlet linearranged on the side of the combustion engine located closest to the further object. Afurther object in the form of a retarder cooler is usually arranged on an opposite side of the combustion engine in relation to the radiator.
    According to an embodiment of the invention, the inlet channel encloses at least a partof an oil cooler. During operation of the combustion engine, engine oil is to be cooledin an engine oil cooler and gearbox oil is to be cooled in a gearboX cooler. It is suitableto arrange at least one of said oil coolers in the inlet channel of the combustion engine.ln this case, the coolant in the inlet channel cools the oil in the oil cooler before it cools the cylinders.
    The oil cooler may be arranged in a position n1idWay between the first bank and thesecond bank. In this case, the coolant comes in heat transfers contact With the heat eXchanger When it floWs along the inlet channel. The oil cooler may be an engine oil cooler or a gearboX oil cooler. There may also be an engine oil cooler and a gearboXoil cooler in the inlet channel. The engine oil cooler and the gearboX oil cooler mayhave different longitudinal positions such that one of the oil coolers is arranged in adownstream position of the other oil cooler in the inlet channel. Alternatively, the inletchannel encloses at least a part of a first oil cool located close to the first bank and atleast a part of a second oil cool located close to the second bank. ln this case, thecoolant may flow through the respective oil coolers when it is directed to the cylinder in said banks.
    According to an embodiment of the invention, the cylinder passages are designed suchthat they provide a differentiated cooling of different zones in connection to thecylinder. A first zone may be a lower part of a cylinder head, a second zone may be anupper part of the cylinder head, a third zone may be an upper part of a cylinder linerand a fourth zone may be a lower part of the cylinder lining. lt is possible to provide adifferentiated cooling in said zones depending of the cooling demand in the respectivezones. The coolant from the inlet channel may be directed first to the zones with a highcooling demand and then to the zones with a lower cooling demand. Furthermore, thecoolant flow rate may be higher in the zones with a high cooling demand than in thezones with a lower cooling demand. The zone including the lower part of the cylinder head normally has the highest cooling demand of the above mentioned zones.
    BRIEF DESCRIPTION OF THE DRAVVINGS ln the following preferred embodiments of the invention are described, as examples, with reference to the attached drawings, on which: Fig. l shows a cooling system for a combustion engine of V-type, Fig. 2 shows a cross sectional view through the combustion engine in the planeA-A in Fig l and Fig. 3 shows a cross sectional through a combustion engine of an altemative embodiment.
    DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THEINVENTION Fig. 1 shows a schematically disclosed vehicle 1 powered by a combustion engine 2 ofV-type. In this embodiment, the combustion engine is a V8, but may be more or lesscylinders. Thus, it has eight cylinders 3 arranged on two separate banks 4, 5. Thecombustion engine 2 may be a diesel engine. The vehicle 1 may be a heavy vehicle.The vehicle 1 comprises a cooling system for cooling of the combustion engine 2. Thecooling system comprises an engine inlet line 6 directing coolant to the combustionengine 2. The engine inlet line 4 is provided with a pump 7 circulating a coolant in thecooling system. The coolant leaving the combustion engine 2 is received in an engineoutlet line 8. In this case, the engine outlet line 8 comprises a retarder cooler 9. Thecooling system may cool other objects arranged close to the combustion engine suchas, for example, a turbo aggregate, EGR in an EGR cooler etc. A thermostat 10 isarranged at an end portion of the engine outlet line 8. When the coolant has a lowertemperature than a regulation temperature of the thermostat 10, it directs the coolant toa radiator bypass line 11 and back to the engine inlet line 6 without cooling. When thecoolant has a higher temperature than the regulation temperature, the thermostat 10directs the coolant to a radiator 12 at a front portion of the vehicle 1. A radiator fan 13and the ram air provides a cooling air stream through the radiator 10 during operationof the vehicle 1. A return line 14 receives the coolant from the radiator 12 and directs it back to the engine inlet line 6.
    Fig. 2 shows a cross section view of the combustion engine 2. The coolant from theengine inlet line 6 is received in an inlet channel 15 of the combustion engine 2. Theinlet channel 15 has a straight extension along substantially the entire longitudinallength of the combustion engine 2. In this case, the inlet channel 15 is defined by twoside walls 16a, 16b, an upper wall formed by a closing element 17 and a lower wallformed by an outlet channel 18 for the coolant. The outlet channel 18 has a straightextension along substantially the entire longitudinal length of the combustion engine 2.The inlet channel 15 and the outlet channel 18 may be formed by a casting process ofthe engine block. The side wall l6a comprises an opening in which an engine oilcooler 19 is arranged. The other side walls l6b comprises an opening in which agearbox oil cooler 20 is arranged. The oil coolers 19, 20 has an identical design. Theoil coolers 19, 20 comprises not visible tubes conducting the oil through the coolers 19, 20 and a plurality of plate shaped heat transfer fins l9a, 20a. In this case, the heat transfer fins 19a, 20a are arranged in a horizontal plane. The coolant in the inletchannel 15 is directed in substantially equal proportions to the cylinders 3 via theopenings in the side walls 16a, 16b and the spaces between the heat transfer fins 19a,20a of the coolers 19, 20.
    The coolant leaving the inlet channel 15 is received in a cylinder circuit 21-23 for eachcylinder 3. Each cylinder circuit comprising a schematically indicated inlet passage 21receiving coolant from the inlet channel 15, cooling passages 22 in which the coolantcools different zones I-IV of the cylinder 3 and a schematically indicated outletpassage 23 directing the coolant to the outlet channel 18. The cooling passagescomprises a first cooling passage 22a cooling a first zone I in the form of a lower partof a cylinder head, a second cooling passage 22b cooling a second zone II in the formof an upper part of the cylinder head, a third cooling passage 22c cooling a third zoneIII in the form of an upper part of a cylinder liner and a fourth cooling passage 22dcooling a fourth zone IV in the form of a lower part of the cylinder liner. In this case,the entire coolant flow rate from the inlet passage 21 is directed to the first coolingpassage 22a. The first cooling passage 22a comprises a number of para11e1 channels eXtending through the lower part of the cylinder head.
    A first part of the coolant leaving the first cooling passage 22a is directed to the secondcooling passage 22b. The second cooling passage 22b comprises a number of para11e1channels eXtending through the upper part of the cylinder head. The coolant leavingthe second cooling passage 22b is directed, via the outlet passage 23, to the outletchannel 18. A second part of the coolant leaving the first cooling passage 22a isdirected to the third cooling passage 22c. The third cooling passage 22c comprises anumber of para11e1 channels eXtending through the upper part of the cylinder liner. Thecoolant leaving the third cooling passage 22c is directed, via the outlet passage 23, tothe outlet channel 18. A third part of the coolant leaving the first cooling passage 22ais directed to the fourth cooling passage 22d. The fourth cooling passage 22dcomprises a number of para11e1 channels eXtending around the lower part of thecylinder liner. The coolant leaving the fourth cooling passage 22d is directed, via the outlet passage 23, to the outlet channel 18.
    The cooling effect in the zones I-IV varies with the flow rate and the temperature ofthe coolant. In this case, the entire flow rate is initially directed through zone I and the lower part of the cylinder head. Consequently, the most effective cooling is provided in zone I. The remaining cooling passages 22b-d receives a lower coolant flow rate and ata higher temperature than the first cooling passage 22a. The remaining coolingpassages 22b-d may be designed such that they receives different large parts of thecoolant flow from the first cooling passage 22a depending on their respective cooling demand.
    Thus, the coolant leaving the cylinder circuits 21-23 is received in the outlet channel18. The outlet channel 18 directs the coolant flow out of the combustion engine 2. Theengine outlet line 8 directs coolant out of the combustion engine 2 on a side of thecombustion engine arranged closed to the retarder cooler 9. The inlet channel 15receives coolant from the engine inlet line 6 on a side of the combustion engine 2arranged closed to the radiator 12. Consequently, the outlet channel 18 directs coolantout of the combustion engine 2 and the inlet channel receives coolant into thecombustion engine 2 on opposite sides of the combustion engine 2. The outlet channel18 is arranged in the engine bloc in a position midway below the banks 4, 5 and in aposition below the inlet channel 5and the oil coolers 19, 20. The design of the coolingpassage through the combustion engine 2 makes it possible to provide a similar coolantflow rate through all cylinders 3. Furthermore, the inlet channel 15 and the outletchannel 18 have a protected positions in the engine bloc and they add no weight to the combustion engine 2.
    Fig. 3 shows a cross sectional view through an altemative combustion engine 2. In thiscase, the outlet channel 18 comprises a first longitudinal part 18a receiving coolantfrom the cylinders 3 in the first bank 4 and a second longitudinal part l8b receivingcoolant from the cylinders 3 in the second bank 5. The first part 18a and the secondpart l8b is separated by an intermediate wall 18c arranged in a position midwaybetween the banks 4, 5. Furthermore, an oil cooler 19 is arranged in the inlet channel15 in a position midway between the banks 4, 5. In this case, the oil cooler 19comprises plate shaped heat transfer fins 19a arranged in vertical planes eXtending in the longitudinal direction of the inlet channel 15.
    The invention is not restricted to the described embodiment but may be varied freely within the scope of the claims.
    权利要求:
    Claims (14)
    [1] 1. l. A combustion engine of V-type, wherein the combustion engine (2) comprisescylinders (3) arranged in a first bank (4) and cylinders arranged in a second bank (5) ofthe combustion engine (2), and a coolant passage directing coolant through thecombustion engine (2), wherein the coolant passage comprises an inlet channel (15)which is arranged in a space between the banks (4, 5) of the combustion engine (2) andconfigured to receive coolant from an engine inlet line (6) and direct it to a cylindercircuit (2l-23) in which the coolant cools the respective cylinders (3), and an outletchannel (18) configured to receive coolant from the respective cylinder circuits (2l-23)and direct it to an engine outlet line (8), characterized in that the outlet channel (18) isarranged in an engine block of the combustion engine (2) in a position midwaybetween the first bank (4) and the second bank (5) and below the inlet channel (l5).
    [2] 2. A combustion engine according to claim l, characterized in that the outlet channel (l8) has an extension along substantially the entire length of the combustion engine (2)-
    [3] 3. A combustion engine according to claim l or 2, characterized in that the outlet channel (l8) has a straight extension along its entire length.
    [4] 4. A combustion engine according to any one of the preceding claims, characterized inthat the outlet channel (l8) is divided into two longitudinal channel parts (l8a, l8b).
    [5] 5. A combustion engine according to claims 4, characterized in that a first channel part(l8a) receives coolant from the cylinders in the first bank (4) and the second channel part receives coolant from the cylinders in the second bank (5).
    [6] 6. A combustion engine according to any one of the preceding claims, characterized inthat the inlet channel (l5) has an extension along substantially the entire length of the combustion engine (2).
    [7] 7. A combustion engine according to any one of the preceding claims, characterized in that the inlet channel (l5) has a straight extension along its entire length.
    [8] 8. A combustion engine according to any one of the preceding claims, characterized inthat the inlet channel (15) is connected to the engine inlet line (6) and the outletchannel (18) is connected to the engine outlet line (8) at the same side of the combustion engine (2).
    [9] 9. A combustion engine according to any one of the claims 1 to 7, characterized in thatthe inlet channel (15) is connected to the engine inlet line (6) and the outlet channel(18) is connected to the engine outlet line (8) on opposite sides of the combustion engine (2).
    [10] 10. A combustion engine according to any one of the preceding claims, characterized i_n that the inlet channel (15) encloses at least a part of an oil cooler (19, 20).
    [11] 11. A combustion engine according to claim 10, characterized in that said at least oneoil cooler (19) is arranged in a position midWay between the first bank (4) and thesecond bank (5).
    [12] 12. A combustion engine according to claim 10, characterized in that the inlet channel(15) encloses at least a part of a first oil cooler (19) close to the first bank (4) and at least a part of a second oil cooler (20) close to the second bank (4).
    [13] 13. A combustion engine according to any one of the preceding claims, characterizedi_n that the cylinder circuit (21-23) is designed such that it provides a differentiated cooling of different zones in connection to the cylinder (3).
    [14] 14. A vehicle comprising a combustion engine (2) according to any one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    SE542066C2|2020-02-18|
    DE102017006300A1|2018-01-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4001140C1|1990-01-17|1991-04-11|Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De|Cylinder block for liquid cooled IC engine - has coolant channels in internal angle of V=shaped block|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1651066A|SE542066C2|2016-07-15|2016-07-15|A combustion engine of V-type|SE1651066A| SE542066C2|2016-07-15|2016-07-15|A combustion engine of V-type|
    DE102017006300.1A| DE102017006300A1|2016-07-15|2017-07-04|V-engine|
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