Freeze prevention arrangement for PCV channel and intake manifold

摘要

Provided are an arrangement capable of reliably preventing freeze of a PCV channel without requiring additional piping and an intake manifold having this arrangement. This arrangement for freeze prevention of a PCV channel includes a PCV channel returning blowby gas containing un-combusted fuel gas as a main component thereof and leaked into an engine to an intake port, an EGR channel returning exhaust gas exhausted from the engine to the intake port, and a heating portion as a common portion between a PCV outer wall of the PCV channel and an EGR outer wall of the EGR channel.

主权项

1. An arrangement for freeze prevention of a PCV channel, the arrangement comprising:
a PCV channel connected to a plurality of intake channels that branch from a surge tank and positioned to return blowby gas containing un-combusted fuel gas as a main component and leaked into an engine to a plurality of intake ports provided in respective cylinders of the engine; an EGR channel returning exhaust gas exhausted from the engine to the intake ports; a heating portion as a common portion between a PCV outer wall of the PCV channel and an EGR outer wall of the EGR channel; and a length of the heating portion in a longitudinal direction spans, in a juxtaposing direction of the intake ports, from the intake port on one end side to the intake port on an other end side.