Freeze prevention arrangement for PCV channel and intake manifold
AssigneeAisin Seiki Kabushiki Kaisha
InventorsTomohisa Senda, Hideaki Teramoto
Life of this patent
Estimating the term…
Abstract
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.
Claims14
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.
An arrangement for preventing freezing of a PCV channel, the arrangement comprising:
- a PCV channel positioned to return blowby gas, containing un-combusted fuel gas as a main component, to a plurality of intake ports provided in respective cylinders of an engine, the plurality of intake ports including a first intake port positioned between second and third intake ports on opposite end sides of the first intake port, the PCV channel possessing a PCV outer wall;
- an EGR channel positioned to return exhaust gas exhausted from the engine to the intake ports, the EGR channel possessing an EGR outer wall;
- a blowby gas heating portion positioned between the PCV outer wall of the PCV channel and the EGR outer wall of the EGR channel to heat blowby gas flowing along the PCV channel;
- and
- the blowby gas heating portion possessing a length that spans, in a juxtaposing direction of the intake ports, from the second intake port to the third intake port so that the blowby gas in the PVC channel is heated throughout said length of the blowby gas heating portion.
Dependencies are inferred from the claim text.