Dry sump engine for a small planing boat
AssigneeHonda Giken Kogyo Kabushiki Kaisha
InventorYoshitsugu Gokan
Life of this patent
Estimating the term…
Abstract
A mounting face of an oil pan is provided in the vicinity of the outside of a fastening bolt for fastening un upper case and a lower case of an engine that support a crankshaft when viewed from the bottom. A strainer is provided in the vicinity of the engaging surface between the oil pan and the engine along the engaging surface. An oil pump is provided at the end of the crankshaft. An oil exit in communication with the oil pump is provided on the oil pan at the end in the axial direction of the crankshaft and is brought into communication with the oil pump by the joint pipe. The aforementioned arrangement provides a dry-sump engine for a small planing boat that can reduce the overall height and size of the engine.
Claims11
A dry-sump engine for a planing boat having a jet propulsion pump, said dry sump engine comprising:
- a crankshaft extending along an axial centerline of said engine;
- an upper case and a lower case of said dry-sump engine;
- at least one fastening bolt securing said upper case and said lower case of the engine along a parting plane;
- an oil pan, said lower case including a mounting face for joining a joint surface of an oil pan and being provided in a position below said parting plane, wherein said fastening bolt is positioned higher than said oil pan with respect to said parting plane and said mounting face surrounds said at least one fastening bolt when viewed with respect to a bottom portion of said lower case and said engine centerline;
- an oil tank;
- and
- an oil pump;
- wherein said oil pan is positioned below said crankshaft and said oil tank and said oil pump are integrally provided on an extension of said crankshaft.
A dry-sump engine for a planing boat having a jet propulsion pump, said dry sump engine comprising:
- a crankshaft extending along an axial centerline of said engine;
- an upper case and a lower case of said dry-sump engine;
- at least one fastening bolt securing said upper case and said lower case of the engine along a parting plane;
- an oil pan, said lower case including a mounting face for joining a joint surface of an oil pan and being provided in a position below said parting plane, wherein said fastening bolt is positioned higher than said oil pan with respect to said parting plane and said mounting face surrounds said at least one fastening bolt when viewed with respect to a bottom portion of said lower case and said engine centerline;
- and
- a strainer, a mounting face for the strainer located at a position lower than the mounting surface for joining said oil pan to said lower case, and an oil exit formed at a front portion of the lower case with respect to said crankshaft and in fluid communication with an oil pump via a joint pipe.
In combination, a dry-sump engine and a planing boat, said engine driving a jet propulsion pump for said planning boat and being arranged in a vessel body of said boat and surrounded by a hull and a deck, said engine comprising:
- a crankshaft extending along a length of the vessel body and in parallel with a centerline of said engine;
- an upper case and a lower case of said dry-sump engine;
- at least one fastening bolt securing said upper case and said lower case of the engine along a parting plane;
- an oil pan, said lowercase including a mounting face for joining a joint surface of an oil pan and being provided in a position below said parting plane, wherein said fastening bolt is positioned higher than said oil pan with respect to said parting plane and said mounting face surrounds said at least one fastening bolt when viewed with respect to a bottom portion of said lower case and said engine centerline;
- and
- a strainer, a mounting face for the strainer located at a position lower than the mounting surface for joining said oil pan to said lowercase, and an oil exit formed at a front portion of the lower case with respect to said crankshaft and in fluid communication with said oil pump via a joint pipe.
Dependencies are inferred from the claim text.