Oil return structure for internal combustion engine
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsHiroshi Kawamura, Akihiro Ikeda, Ted Haladyna
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Abstract
An oil pan is provided below a crankcase of an engine. The oil pan has an oil reservoir in its upper case. An oil discharge pipe is located within the oil reservoir, the oil discharge pipe extending from an oil separator of a PCV system. The oil reservoir protrudes inward of an inner wall surface of a lower case. The oil reservoir has an oil drain hole on a bottom surface at its inwardly protruding portion. The oil reservoir communicates with a lower chamber through the oil drain hole.
Claims8
An oil return structure for an internal combustion engine, comprising:
- an oil pan located below a crankcase of the internal combustion engine;
- an oil return passage provided in the crankcase for returning oil from an upper part of the internal combustion engine into the oil pan;
- and
- an oil reservoir formed in an upper part of the oil pan, wherein
- the oil return passage has a downstream end located within the oil reservoir, the oil reservoir protrudes inward of an inner wall surface of a lower part of the oil pan, an oil discharge hole is formed on a bottom surface of the oil reservoir at an inwardly protruding portion of the oil reservoir, and the oil reservoir communicates through the oil discharge hole with a space defined by the lower part of the oil pan.
An oil return structure for an internal combustion engine, comprising:
- an oil pan located below a crankcase of the internal combustion engine;
- an oil return passage provided in the crankcase for returning oil from an upper part of the internal combustion engine into the oil pan;
- and
- an oil reservoir formed in an upper part of the oil pan, wherein
- the oil return passage has a downstream end located within the oil reservoir, an oil discharge hole is formed on a side surface of the oil reservoir at a lowest part of the oil reservoir, the oil reservoir communicates through the oil discharge hole with a space defined by a lower part of the oil pan, and at least a part of the bottom surface of the oil reservoir is tilted downward toward the oil discharge hole.
Dependencies are inferred from the claim text.