ENGINE INTAKE AND EXHAUST SYSTEM AND INTERNAL COMBUSTION ENGINE
FIG1 is a side view of an exhaust side of an engine according to one embodiment of the present disclosure
In an intake and exhaust system for an engine of an automobile illustrated in FIG1, a reference number "1" is an engine body, and includes a cylinder block 1a, a cylinder head 1b fixed to an upper surface of the cylinder block 1a, and an oil pan 1c fixed to a lower surface of the cylinder block 1a. As illustrated in FIG1, a downstream end side of the catalytic converter 11 is connected to a particulate matter removing device (hereinafter, referred to as "filter device") 12 as the exhaust gas purifier. The filter device 12 has a filter built therein to remove particulate matter (such as soot) within the exhaust gas, and has a center line substantially along the cylinder lined-up direction along the exhaust-side surface of the engine body 1. An upstream end side of the filter device 12 is disposed near the downstream end side of the catalytic converter 11 so that they are connected vertically.
side view
8
surge tank
24
supply pipe
17
EGR valve
14
flexible exhaust pipe
11
catalytic converter
1
engine body
25
return pipe
16
EGR pipe
27
bracket
26
support plate
13
curved pipe
['1. An intake and exhaust system for an engine (1), comprising: an exhaust gas recirculation (EGR) passage (15, 16, 17) configured to recirculate a portion of exhaust gas as EGR gas, from an exhaust passage (2a, 11, 12, 13, 14) of the engine (1) to an intake passage (2b, 3, 4, 5, 8); and an EGR cooler (15) disposed in the EGR passage (15, 16, 17), the EGR cooler (15) being coupled to a passage wall of the exhaust passage (2a, 11, 12, 13, 14) at an EGR gas inlet side, and having a center line intersecting with a flow direction of exhaust gas in the exhaust passage (2a, 11, 12, 13, 14), wherein a through-hole (18) communicating the EGR cooler (15) with the exhaust passage (2a, 11, 12, 13, 14) is a long hole (18) elongated substantially in the flow direction in the exhaust passage (2a, 11, 12, 13, 14), wherein an exhaust gas purifier (12) is provided in an intermediate part of the exhaust passage (2a, 11, 12, 13, 14), wherein the exhaust gas passage (2a, 11, 12, 13, 14) has a curved pipe (13) on a downstream side of the exhaust gas purifier (12) in the flow direction to change the flow direction, wherein the through-hole (18) communicating the EGR cooler (15) with the exhaust passage (2a, 11, 12, 13, 14) opens to a passage wall of the curved pipe (13) of the exhaust passage (2a, 11, 12, 13, 14) at an outer circumferential side of the curve of the exhaust passage on an upper surface of the curved pipe (13), and the EGR cooler (15) is directly attached to the curved pipe (13).']