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公开(公告)号:WO2017078589A1
公开(公告)日:2017-05-11
申请号:PCT/SE2016/050944
申请日:2016-10-05
Applicant: SCANIA CV AB
Inventor: OLOFSSON, Eric , NORLING, Daniel , VALLINDER, Michael , ASPFORS, Jonas , LINDERYD, Johan , HÖGLUND, Henrik , LARSSON, Per-Inge , DAHL, Andreas , STENBERG, Martin
CPC classification number: F02B37/02 , F02B27/04 , Y02T10/144 , Y02T10/146
Abstract: Herein a four stroke internal combustion engine (2) is disclosed. The internal combustion engine (2) comprises at least one cylinder arrangement (4), an exhaust conduit (6), and at least one turbine. The cylinder arrangement (4) comprises an exhaust port arrangement (14), configured to open and close an exhaust flow area, A CYL . The cylinder arrangement (4) has a maximum volume, V MAX . The exhaust conduit (6) extends between the exhaust flow area, A CYL , and a turbine wheel inlet area, A™, of the turbine and has an exhaust conduit volume, V EXH . The exhaust conduit volume, V EXH , is≤ 0.5 times the maximum volume, V MAX . The exhaust port arrangement (1 4) is configured to expose the exhaust flow area, ACYL, at a size of at least 0.22 times the maximum volume, V MAX , when a piston (10) of the cylinder arrangement (4) is at the bottom dead centre, BDC.
Abstract translation: 这里公开了一种四冲程内燃机(2)。 内燃机(2)包括至少一个汽缸装置(4),排气管道(6)和至少一个涡轮机。 气缸装置(4)包括排气口装置(14),该排气口装置被构造成打开和关闭排气流动区域CYL。 气缸装置(4)具有最大体积V MAX。 排气管道(6)在涡轮机的排气流动区域A CYL和涡轮机叶轮入口区域A T之间延伸并且具有排气管道体积V EXH, 子>。 排气管体积VEXX≤最大体积V MAX的0.5倍。 排气口装置(14)构造成当气缸的活塞(10)处于最大体积V MAX的至少0.22倍的尺寸时暴露排气流动区域ACYL, 安排(4)在下死点,BDC。 p>