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US 9,822,679 B2Granted
Breather device for engine
AssigneeKawasaki Jukogyo Kabushiki Kaisha
InventorYoshiharu Matsuda
Life of this patent
Estimating the term…
Abstract
A breather device for a combustion engine includes a breather chamber in which oil mist in the combustion engine is introduced, a breather passage that guides the oil mist to the breather chamber from a crank chamber, and a blowby gas passage that guides, to an air intake passage, blowby gas having been subjected to gas-liquid separation in the breather chamber. A separator is accommodated in a blowby drawing pipe forming the blowby gas passage. The oil mist is made into droplets by the separator so that the liquid component is collected in the breather chamber.
Claims13
A breather device for a combustion engine comprising:
- a breather chamber having formed therein a labyrinth structure in which oil mist in the combustion engine is introduced and gas-liquid separation is performed;
- a breather passage configured to guide, into the breather chamber, the oil mist from a crank chamber in which a crank shaft is disposed;
- a blowby gas passage configured to guide, to an air intake passage, blowby gas having been subjected to the gas-liquid separation in the breather chamber;
- and
- a separator accommodated in a tubular passage, formed between the breather passage and the blowby gas passage, the separator forming a shield structure having air permeability;
- wherein
- the tubular passage is formed by a pipe body that is detachably connected to an engine body of the combustion engine;
- an elastic tube is connected to an outer periphery of the pipe of the pipe body;
- and
- the separator is accommodated within the pipe body.
7 more elements
A breather device for a combustion engine comprising:
- a breather chamber having formed therein a labyrinth structure in which oil mist in the combustion engine is introduced and gas-liquid separation is performed;
- a breather passage configured to guide, into the breather chamber, the oil mist from a crank chamber in which a crank shaft is disposed;
- a blowby gas passage configured to guide, to an air intake passage, blowby gas having been subjected to the gas-liquid separation in the breather chamber;
- a separator accommodated in a tubular passage, formed between the breather passage and the blowby gas passage, the separator forming a shield structure having air permeability;
- and
- a pipe member forming the breather passage or the blowby gas passage and including an elastic pipe part having elasticity and a metal pipe part to which the elastic pipe part is connected;
- wherein:
- the separator is accommodated in the metal pipe part;
- the metal pipe part includes a proximal end part connected to an engine body of the combustion engine and a body part enlarged with a step part from the proximal end part, the body part being exposed from the engine body;
- the separator is accommodated in the body part;
- and
- an outer diameter of the separator is set larger than an inner diameter of the proximal end part and smaller than an inner diameter of the body part.
9 more elements
A breather device for a combustion engine comprising:
- a breather chamber having formed therein a labyrinth structure in which oil mist in the combustion engine is introduced and gas-liquid separation is performed;
- a breather passage configured to guide, into the breather chamber, the oil mist from a crank chamber in which a crank shaft is disposed;
- a blowby gas passage configured to guide, to an air intake passage, blowby gas having been subjected to the gas-liquid separation in the breather chamber;
- a separator accommodated in a tubular passage, formed between the breather passage and the blowby gas passage, the separator forming a shield structure having air permeability;
- and
- a pipe member forming the breather passage or the blowby gas passage and including an elastic pipe part having elasticity and a metal pipe part made of a metal material;
- wherein:
- the metal pipe part is formed in an L-shape having a first distal end portion to be press-fitted into an engine body of the combustion engine and a second distal end portion connected to the elastic pipe part;
- and
- an outer diameter surface on a side opposite to the first distal end portion at an L-shaped base of the metal pipe part in a press-fitting direction is press-deformed to a flat surface perpendicular to the press-fitting direction.
7 more elements
Dependencies are inferred from the claim text.