Engine and outboard engine structure

An engine comprising:

• (a) an engine body having a plurality of cylinders therein;
• (b) a cylinder head mounted on one end of said engine body;
• (c) a crankcase mounted on an other end of said engine body;
• (d) a plurality of intake pipes communicating with said cylinders, said intake pipes being divided into two groups, one group of the intake pipes extending from one of opposite sides of said cylinder head and along a first side surface of said engine body toward said crankcase, and another group of said intake pipes extending from the other side of said cylinder head and along an opposite side surface of said engine body toward the crankcase;
• (e) a first surge tank mounted on one side of said crankcase and a second surge tank mounted on the other side of said crankcase;
• (f) wherein said one group of said intake pipes is connected to said first surge tank and said another group of said intake pipes is connected to said second surge tank;
• and
• (g) throttle means disposed outside of said crankcase and coupled to said first and second surge tanks for controlling the flow of air into said surge tanks.

An engine comprising:

• (a) a cylinder block having two groups of horizontally oriented cylinders, said two groups of cylinders configured to form a V-shape, wherein one group is offset toward a higher side;
• (b) oil pump means mounted on said cylinder block and positioned beneath said higher group of cylinders;
• (c) a crankshaft disposed vertically;
• and
• (d) a power transmission belt associated with said crankshaft at one axial end portion of the crankshaft, said oil pump means being driven by said crankshaft at a location near the other axial end portion of the crankshaft.

A four cycle engine comprising:

• (a) a cylinder block;
• (b) a plurality of cylinders located in said cylinder block, said cylinders being horizontally oriented and configured in a V-shape configuration;
• (c) a vertically oriented crankshaft mounted on said cylinder block;
• (d) a plurality of intake pipes divided into two groups which extend along respective opposite side portions of said cylinder block;
• and
• (e) an oil filter mounted on one of said opposite side portions of said cylinder block.

An outboard engine structure having an engine, said engine comprising:

• (a) a cylinder block;
• (b) a plurality of horizontally oriented cylinders formed in said cylinder block, said cylinders being in a V-shape configuration;
• (c) a single cylinder head, common to all of said cylinders, mounted on said cylinder block;
• (d) a plurality of exhaust passages formed in said cylinder head at a location corresponding to inner sides of said V-shaped configuration so as to lie at a central portion of the V, said exhaust passages communicating with said cylinders;
• (e) a plurality of intake passages formed in outer sides of said cylinder head and opening to lateral opposite outer sides of the cylinder head, corresponding to outer sides of the V, said intake passages communicating with said cylinders;
• and
• (f) a fuel injection nozzle located in each of said plurality of intake passages.

An outboard engine structure having a four cycle engine, said engine comprising:

• (a) a cylinder block;
• (b) a crankshaft vertically mounted in said cylinder block;
• (c) a plurality of horizontally oriented cylinders disposed in said cylinder block in a V-shaped configuration;
• (d) intake pipes mounted on said cylinder block, said intake pipes being divided into two groups extending horizontally along opposite side portions of said cylinder block;
• and
• (e) oil filter means mounted on said cylinder block on one of said opposite side portions of the cylinder block.

An engine comprising:

• (a) an engine body having a plurality of cylinders therein;
• (b) a cylinder head mounted on one end of said engine body;
• (c) a crankcase mounted on the other end of said engine body;
• (d) a plurality of intake pipes communicating with said cylinders, at least one of said intake pipes extending from a side of said cylinder head and along a first side surface of said engine body toward said crankcase, and at least one other of said intake pipes extending from a side of said cylinder head and along an opposite side surface of said engine body;
• (e) a first surge tank mounted on one side of said crankcase and a second surge tank mounted on the other side of said crankcase;
• (f) wherein said at least one of said plurality of intake pipes is connected to said first surge tank and said at least one other of said plurality of intake pipes is connected to said second surge tank;
• and
• (g) throttle means coupled to said first and second surge tanks for controlling the flow of air into said surge tanks.

An engine comprising:

• (a) a cylinder block having two groups of horizontally oriented cylinders, said two groups of cylinders configured to form a V-shape, wherein one group is higher than the other group;
• (b) oil pump means mounted on said cylinder block and positioned beneath said higher group of cylinders;
• (c) including a single cylinder head mounted on said cylinder block, said cylinder head having a valve operating chamber and an oil return passage, wherein said oil return passage is located below said higher group of cylinders, said oil return passage returning oil from said valve operating chamber to said cylinder block;
• (d) a cylinder block having two groups of horizontally oriented cylinders, said two groups of cylinders configured to form a V-shape, wherein one group is higher than the other group;
• and
• (e) oil pump means mounted on said cylinder block and positioned beneath said higher group of cylinders.