Breather device for combustion engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorsYoshiharu Matsuda, Kazuki Arima, Yasushi Ishibashi, Akira Tomofuji
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Abstract
A breather device includes: a breather chamber into which oil mist in a crank chamber of a combustion engine is introduced; and a breather passage configured to guide oil mist from a crank chamber into the breather chamber. The breather chamber has formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed. An introduction pipe forming a part of the breather passage is communicated with an upper portion of the crank chamber, and projects upward from an upper end portion of the crank case.
Claims17
A breather device for a combustion engine comprising:
- a breather chamber into which oil mist in the combustion engine is introduced, the breather chamber having formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed;
- and
- a breather passage configured to guide, into the breather chamber, oil mist from a crank chamber in which a crank shaft is disposed, wherein
- the breather passage is disposed so as to project upward from an upper end portion of a crank case and passes outside of the combustion engine to be connected to the breather chamber;
- an introduction hole to which an introduction pipe is connected in the upper end portion of the crank case,
- the introduction hole is open to a high-pressure region in the crank chamber;
- the combustion engine includes a rotating body having a protruding portion formed in an outer periphery portion thereof and configured to be rotatably driven in the crank chamber, and
- the introduction hole is open to a region in which pressure is increased due to rotation of the rotating body in the crank chamber.
The breather device for the combustion engine as claimed in claim, 1 further comprising a block member provided in the crank chamber and configured to prevent a liquid component of the oil mist from entering the introduction hole due to centrifugal force of the rotating body.
The breather device for the combustion engine as claimed in claim , 1 further comprising an introduction passage formed in the crank chamber and communicated with the breather passage;
- and
- the introduction passage being perpendicular to an axis of the introduction hole.
A breather device for a combustion engine comprising:
- a breather chamber into which oil mist in the combustion engine is introduced, the breather chamber having formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed;
- a breather passage configured to guide, into the breather chamber, oil mist from a crank chamber in which a crank shaft is disposed, wherein
- an introduction pipe forming the breather passage and communicated with the crank chamber is disposed so as to project upward from an upper end portion of a crank case,
- an introduction hole to which the introduction pipe is connected is formed in the upper end portion of the crank case;
- the combustion engine includes a plurality of balancer shafts configured to be rotatably driven in the crank chamber;
- the introduction hole is open to a region in which pressure is increased due to rotation of the balancer shafts in the crank chamber, and
- the introduction hole is open adjacent to a balancer shaft that is disposed at an uppermost position among the plurality of the balancer shafts.
A breather device for a combustion engine comprising:
- a breather chamber into which oil mist in the combustion engine is introduced, the breather chamber having formed therein a labyrinth structure in which gas-liquid separation of the oil mist is performed;
- and
- a breather passage configured to guide, into the breather chamber, oil mist from a crank chamber in which a crank shaft is disposed, wherein
- an introduction pipe forming the breather passage and communicated with the crank chamber is disposed so as to project upward from an upper end portion of a crank case;
- an introduction hole to which the introduction pipe is connected is formed in the upper end portion of the crank case;
- the combustion engine includes a rotating body having a protruding portion formed in an outer periphery portion thereof and configured to be rotatably driven in the crank chamber;
- the introduction hole is open to a region in which pressure is increased due to rotation of the rotating body in the crank chamber;
- and
- further comprising a block member provided in the crank chamber and configured to prevent a liquid component of the oil mist from directly entering the introduction hole due to the centrifugal force of the rotating body.
Dependencies are inferred from the claim text.