| 摘要 |
An exhaust gas recirculation (EGR) system for an internal combustion engine having fewer than four cylinders, eg an engine with a non-uniform firing sequence, eg a two-cylinder 180o crankshaft engine, is coupled between an exhaust manifold and an intake manifold and is provided with at least three inlets 520-540; 610 into the intake manifold 200, the inlets 520-540;610 being spaced along an axial direction of the intake manifold 200. The inlets 520-540 may direct the exhaust flow countercurrent to the intake air flow. The inlets may be passing holes 610 along a pipe 600 placed inside the intake manifold 200. The holes 610 may be spaced progressively further apart in the direction of exhaust gas flow (fig.5). Alternatively, the holes 610 may be of different sizes, being larger in the central region of the pipe (fig.6). |
