公开(公告)号：US20040045281A1

公开(公告)日：2004-03-11

申请号：US10241929

申请日：2002-09-11

Applicant: Detroit Diesel Corporation

Inventor： William K. Ahrens ,  Brian A. Lewallen

IPC: F01N003/00 ,  F01N003/10

CPC classification number: F02B37/00 ,  F02B3/06 ,  F02B29/0406 ,  F02M26/05 ,  F02M26/23 ,  Y02T10/144

Abstract: An internal combustion engine includes a block having a plurality of cylinders. An intake manifold is fluidly connected to the block for supplying charge air to the cylinders. An exhaust manifold is fluidly connected to the plurality of cylinders for conducting exhaust gas away from the cylinders. A turbocharger including a turbine having an exhaust gas inlet is fluidly connected with the exhaust manifold. The turbocharger also includes a compressor having a compressor air inlet and air outlet. The compressor air outlet is fluidly connected to the intake manifold to pressurize the charge air during high power levels of engine operation. An EGR bypass is fluidly connected between the turbine exhaust gas inlet and the intake manifold to recirculate a portion of the exhaust gases to the cylinders. An intake air bypass is fluidly connected between the compressor air outlet and the compressor air inlet. The intake air bypass is adapted to recirculate a portion of compressor outlet air back to the compressor air inlet to reduce compressor outlet pressure and aid EGR flow through the EGR bypass to the cylinders during high power operation of the engine.

Abstract translation: 内燃机包括具有多个气缸的块体。 进气歧管流体地连接到块，用于向缸提供增压空气。 排气歧管流体地连接到多个气缸，用于将废气远离气缸。 包括具有排气入口的涡轮机的涡轮增压器与排气歧管流体连接。 涡轮增压器还包括具有压缩机空气入口和空气出口的压缩机。 压缩机空气出口流体地连接到进气歧管，以在发动机运转的高功率水平期间对增压空气加压。 EGR旁路流体地连接在涡轮排气入口和进气歧管之间，以将一部分废气再循环到气缸。 进气空气旁路流体连接在压缩机空气出口和压缩机空气入口之间。 进气旁路适于使压缩机出口空气的一部分再循环回压缩机空气入口以减小压缩机出口压力，并且在发动机的高功率运行期间帮助通过EGR旁路的EGR流到气缸。