| CPC F02M 26/74 (2016.02) [F02M 26/15 (2016.02); F02M 26/35 (2016.02)] | 7 Claims |
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1. A foreign matter intrusion prevention structure, comprising:
an internal-combustion engine;
an intake manifold that introduces outside air into a cylinder of the internal-combustion engine;
an exhaust manifold that collects exhaust gas discharged from the cylinder of the internal-combustion engine;
an exhaust gas purifying device that is connected to the exhaust manifold through an exhaust duct;
an exhaust gas recirculation device that sends a part of the exhaust gas from the exhaust manifold to the intake manifold without passing the part of the exhaust gas through the exhaust gas purifying device; and
an intrusion prevention net provided in a vicinity of an inlet from the exhaust manifold to the exhaust gas recirculation device,
wherein the intrusion prevention net is formed such that steel wool is housed in two outer-shell members that are formed in hemispherical shapes and are coarsely netted.
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