• 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:
    AB STRACT Two sets of assemblies (2a, 2b) are arranged such that a diesel particulate filterdevice (3) of an assembly (2a) as a first set, a selective catalytic reduction device (4) ofthe assembly (2a) as the first set, a selective catalytic reduction device (4) of anassembly (2b) as a second set, and a diesel particulate filter device (3) of the assembly(2b) as the second set are located next to each other in this order. Respective first andsecond connection pipes (7a, 7b) are routed through a region directly underneath anarrangement region (R2) Where the two selective catalytic reduction devices (4) and thelike are arranged, and connected to the respective diesel particulate filter devices (3).Thereby, an engine unit and a Work vehicle Which facilitate connection between anengine (10) and an exhaust gas treatment structure (l) and can reduce a load on the first and second connection pipes (7a, 7b) due to vibration can be achieved. _32-
    公开号:SE538713C2
    申请号:SE1451567
    申请日:2013-05-14
    公开日:2016-10-25
    发明作者:Kobayashi Tsuyoshi；Tsutsumi Katsuhiro；Miyamoto Hirofumi
    申请人:Komatsu Mfg Co Ltd；
    IPC主号:
    专利说明:

    AN ENGINE UNIT WITH EXHAUST GAS TREATMENT DEVICES ARRANGEDABOVE THE ENGINE, AND A WORK VEHICLE COMPRISING SUCH ANENGINE UNIT TECHNICAL FIELD The present invention relates to an engine unit and a Work vehicle.BACKGROUND ART A Work vehicle such as a hydraulic excavator, bulldozer, or a Wheel loader isequipped With an exhaust gas treatment device. Examples of the exhaust gastreatment device include a diesel particulate filter (DPF) device, a diesel oxidationcatalyst (DOC) device, and a selective catalytic reduction (SCR) device.
    A Work vehicle equipped With an exhaust gas treatment device is disclosed, forexample, in Japanese Patent Laying-Open No. 2012-097413 (see PTD 1).
    In this publication, a table is arranged above an upper frame With support legsinterposed therebetween, and a first exhaust gas treatment device and a second exhaustgas treatment device constituting an exhaust gas treatment unit are arranged above thetable. An engine and the first exhaust gas treatment device are connected by aconnection pipe.
    CITATION LISTPATENT DOCUMENT PTD 1: Japanese Patent Laying-Open No. 2012-097413SUMMARY OF INVENTIONTECHNICAL PROBLEM In the above publication, the exhaust gas treatment unit is supported by supportssuch as the support legs and the table. Thus, a large load due to a difference invibration between the engine and the supports acts on the connection pipe.
    Here, a vehicle equipped With a large engine may have an insuff1cient exhaustgas treatment capability, and thus it is contemplated to provide such a vehicle With a plurality of exhaust gas treatment units in order to improve exhaust gas treatment _1_
    权利要求:
    Claims (14)
    [1] 1. l. An engine unit, comprising: an engine (l0); a first exhaust gas treatment unit (2a) arranged above said engine (10) andincluding a first exhaust gas treatment device (3) and a second exhaust gas treatmentdevice (4); a second exhaust gas treatment unit (2b) arranged above said engine (l0) andincluding a third exhaust gas treatment device (3) and a fourth exhaust gas treatmentdevice (4); a first connection pipe (7a) having an expandable first belloWs part (7aa) andguiding exhaust gas from said engine (l0) to said first exhaust gas treatment device (3)of said first exhaust gas treatment unit (2a); and a second connection pipe (7b) having an expandable second bellows part (7ba)and guiding the exhaust gas from said engine (l0) to said third exhaust gas treatmentdevice (3) of said second exhaust gas treatment unit (2b), Wherein said first to fourth exhaust gas treatment devices (3,4,3,4) are arranged to belocated in an order of said first exhaust gas treatment device (3), said second exhaustgas treatment device (4), said fourth exhaust gas treatment device (4), and said thirdexhaust gas treatment device (3), such that respective longitudinal directions thereofextend next to each other, said first connection pipe (7a) is routed through at least a partial region (R2l) ofa region (R2) directly undemeath said second exhaust gas treatment device (4) and aregion directly undemeath said fourth exhaust gas treatment device (4), and said second connection pipe (7b) is routed through at least a partial region (R22)of the region (R2) directly undemeath said second exhaust gas treatment device (4) and the region directly undemeath said fourth exhaust gas treatment device (4).
    [2] 2. The engine unit according to claim l, wherein connection ends (7ab, 7bb)of respective said first connection pipe (7a) and said second connection pipe (7b) on aside close to said engine (10) are located in at least a portion of regions directlyundemeath said first exhaust gas treatment unit (2a) and said second exhaust gastreatment unit (2b), or at least a portion of a region directly undemeath between said first exhaust gas treatment unit (2a) and said second exhaust gas treatment unit (2b).
    [3] 3. The engine unit according to claim l, wherein connection ends (7ab, 7bb)of respective said first connection pipe (7a) and said second connection pipe (7b) on aside close to said engine (10) are located in at least a portion of regions directlyundemeath said second exhaust gas treatment device (4) and said fourth exhaust gastreatment device (4), or at least a portion of a region directly undemeath between said second exhaust gas treatment device (4) and said fourth exhaust gas treatment device (4).
    [4] 4. The engine unit according to any of claims l to 3, wherein said first exhaustgas treatment device (3) and said second exhaust gas treatment device (4), said secondexhaust gas treatment device (4) and said fourth exhaust gas treatment device (4), andsaid fourth exhaust gas treatment device and said third exhaust gas treatment device (3) are each arranged separately with a gap therebetween, as seen in a plan view.
    [5] 5. The engine unit according to any of claims l to 4, wherein said first exhaust gas treatment unit (2a) includes a first interrnediate connectionpipe (5) connecting between said first exhaust gas treatment device (3) and said secondexhaust gas treatment device (4), said second exhaust gas treatment unit (2b) includes a second interrnediateconnection pipe (5) connecting between said third exhaust gas treatment device (3) andsaid fourth exhaust gas treatment device (4), said engine (10) unit further comprises: _2_ a reducing agent tank (2l); and reducing agent pipes (23) connecting between said reducing agent tank(21) and respective said first interrnediate connection pipe (5) and said secondinterrnediate connection pipe (5), and said reducing agent pipes (23) are connected to respective said first interrnediate connection pipe (5) and said second interrnediate connection pipe (5), from the same side in said longitudinal direction.
    [6] 6. The engine unit according to claim 5, wherein each of a gap between saidfirst exhaust gas treatment device (3) and said second exhaust gas treatment device (4),a gap between said second exhaust gas treatment device (4) and said fourth exhaust gastreatment device (4), and a gap between said fourth exhaust gas treatment device (4)and said third exhaust gas treatment device (3) is smaller than a diameter of said firstinterrnediate connection pipe (5) and a diameter of said second interrnediate connection pipe (5), as seen in a plan view.
    [7] 7. The engine unit according to claim 5 or 6, wherein a gap between said first exhaust gas treatment device (3) and said secondexhaust gas treatment device (4) overlaps said first interrnediate connection pipe (5), asseen in a plan view, and a gap between said third exhaust gas treatment device (3) and said fourthexhaust gas treatment device (4) overlaps said second interrnediate connection pipe (5), as seen in a plan view.
    [8] 8. The engine unit according to any of claims l to 7, wherein said longitudinal directions of respective said first exhaust gas treatment device(3) and said third exhaust gas treatment device (3) are parallel to each other, as seen ina plan view, and a first gas inlet of said first exhaust gas treatment device (3) to which said first _3_ connection pipe (7a) is connected and a second gas inlet of said third exhaust gastreatment device (3) to which said second connection pipe (7b) is connected are locatedon a virtual plane orthogonal to both of said longitudinal directions of respective said first exhaust gas treatrnent device (3) and said third exhaust gas treatment device (3).
    [9] 9. The engine unit according to any of claims 1 to 8, wherein said firstbellows part (7aa) includes two bellows portions (7aa, 7aa), and said second bellows part (7ba) includes two bellows portions (7ba,7ba).
    [10] 10. The engine unit according to any of claims 1 to 9, wherein said secondconnection pipe (7b) has a portion which tums, after said second connection pipe (7b) extends in one direction, in a direction opposite to said one direction.
    [11] 11. The engine unit according to any of claims 1 to 10, wherein said firstexhaust gas treatment device (3) and said second exhaust gas treatment device (4) arearranged line-symmetrically to said third exhaust gas treatment device (3) and said fourth exhaust gas treatment device (4), as seen in a plan view.
    [12] 12. A work vehicle having said engine unit according to any of claims 1 to 11.
    [13] 13. The work vehicle according to claim 12, further comprising a vehicularbody frame (15) , whereinsaid first exhaust gas treatrnent unit (2a) and said second exhaust gas treatment unit (2b) are supported on said vehicular body frame (15).
    [14] 14. The work vehicle (30) according to claim 12, wherein said first exhaustgas treatment unit (2a) and said second exhaust gas treatment unit (2b) are supported on said engine (10).
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    WO2014006977A1|2014-01-09|
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    法律状态:
    优先权:
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