Multi-cylinder internal combustion engine
AssigneeHonda Motor Co., Ltd.
InventorsKenichi Ohmori, Akifumi Nomura
Life of this patent
Estimating the term…
Abstract
A communicating passage for discharging oil and recovering the oil in an oil pan in a multi-cylinder internal combustion engine wherein the communicating passage enables internal spaces of a plurality of crank chambers corresponding to a plurality of cylinders to communicate is provided to a crankcase. An opening of a drain for discharging oil inside the communicating passage is provided. In addition, the drain for discharging the oil via the opening is provided. The drain is formed to discharge the oil on the side of the oil pan provided to the crankcase.
Claims10
A multi-cylinder internal combustion engine wherein a communicating passage enables an internal space of a plurality of crank chambers corresponding to a plurality of cylinders to communicate, said communicating passage being provided to a crankcase, the multi-cylinder internal combustion engine comprising:
- a drain;
- and
- an opening of the drain for discharging oil being provided inside the communicating passage;
- wherein the oil is discharged from the opening of the drain via the drain,
- wherein the communicating passage is configured by fixing a cover in the shape of a bowl that encloses a communicating hole provided to the crankcase so as to make the crank chamber and the communicating passage communicate to the crankcase;
- the bottom of the cover is inclined downward toward the opening of the drain;
- and
- a return passage of the oil that lubricates a cylinder head and a valve system is connected to the communicating passage.
A multi-cylinder internal combustion engine comprising:
- a plurality of crank chambers corresponding to a plurality of cylinders;
- a communicating passage formed for enabling communication between the plurality of crank chambers of the multi-cylinder internal combustion engine;
- a drain;
- and
- an opening operatively connected to the drain for discharging oil being provided inside the communicating passage;
- wherein the oil is discharged from the opening operatively connected to the drain via the drain to an oil pan,
- wherein the communicating passage is configured by fixing a cover in the shape of a bowl that encloses a communicating hole provided to the crankcase so as to make the crank chamber and the communicating passage communicate to the crankcase;
- the bottom of the cover is inclined downward toward the opening of the drain;
- and
- a return passage of the oil that lubricates a cylinder head and a valve system is connected to the communicating passage.
Dependencies are inferred from the claim text.