ENGINE INCLUDING FUEL INJECTOR SPRAY PATTERN
An engine assembly may include an engine structure defining a combustion chamber, a spark plug extending into a central region of the combustion chamber and a fuel injector in communication with the central region of the combustion chamber. The fuel injector may define a C-shaped fuel spray emanating from the central region of the combustion chamber and spaced from the spark plug.
1 . An engine assembly comprising:
an engine structure defining a combustion chamber;
a spark plug extending into a central region of the combustion chamber; and
a fuel injector in communication with a central region of the combustion chamber and defining a C-shaped fuel spray emanating from the central region and spaced from the spark plug.
2 . The engine assembly of claim 1 , wherein the C-shaped fuel spray is formed by a series of individual plumes including an initial plume located on a first side of the spark plug and a last plume located on a second side of the spark plug opposite the first side.
3 . The engine assembly of claim 2 , wherein an angle defined between an outer periphery of the initial plume adjacent the first side of the spark plug and an outer periphery of the last plume adjacent the second side of the spark plug is at least twenty degrees.
4 . The engine assembly of claim 2 , wherein an angle defined between a centerline of the initial plume and a centerline of the last plume is at least thirty degrees.
5 . The engine assembly of claim 2 , wherein intermediate plumes are defined between the initial plume and the last plume and each of the intermediate plumes defines an included angle greater than a first included angle defined by the initial plume and a second included angle defined by the last plume.
6 . The engine assembly of claim 5 , wherein the first and second included angles and the included angle of each of the intermediate plumes are greater than twenty degrees.
7 . The engine assembly of claim 2 , wherein intermediate plumes are defined between the initial plume and the last plume and each of the initial, last, and intermediate plumes define a plume diameter greater than five millimeters at a location fifty millimeters into the combustion chamber.
8 . The engine assembly of claim 2 , wherein the initial plume and the last plume extend radially beyond the spark plug at a location axially beyond the spark plug.
9 . The engine assembly of claim 1 , wherein the spark plug and the fuel injector are each radially offset from a center of a the combustion chamber in directions opposite one another.
10 . The engine assembly of claim 9 , wherein a first half of the combustion chamber defines an intake side of the combustion chamber and a second half of the combustion chamber defines an exhaust side of the combustion chamber, the spark plug and the fuel injector being located between the intake side and the exhaust side.
11 . An engine assembly comprising:
an engine structure defining a combustion chamber;
a spark plug extending into a central region of the combustion chamber; and
a fuel injector in communication with a central region of the combustion chamber and defining a C-shaped fuel spray emanating from the central region, spaced from the spark plug, and formed by a series of individual plumes including an initial plume located on a first side of the spark plug, a last plume located on a second side of the spark plug opposite the first side, and a central plume located between the initial plume and the last plume.
12 . The engine assembly of claim 11 , wherein the central plume extends radially outward from the spark plug.
13 . The engine assembly of claim 12 , wherein the initial plume defines a first included angle, the last plume defines a second included angle, and the central plume defines a third included angle greater than the first and second included angles.
14 . The engine assembly of claim 13 , wherein the C-shaped fuel spray includes a first intermediate plume located between the initial plume and the central plume and a second intermediate plume located between the central plume and the last plume.
15 . The engine assembly of claim 14 , wherein the first intermediate plume defines a fourth included angle and the second intermediate plume defines a fifth included angle, the third included angle being greater than the fourth and fifth included angles.
16 . The engine assembly of claim 15 , wherein the fourth included angle is greater than the first included angle.
17 . The engine assembly of claim 16 , wherein the fifth included angle is greater than the second included angle.
18 . The engine assembly of claim 17 , wherein each of the first, second, third, fourth and fifth included angles are each greater than twenty degrees.
19 . The engine assembly of claim 18 , wherein an angle defined between an outer periphery of the initial plume adjacent the first side of the spark plug and an outer periphery of the last plume adjacent the second side of the spark plug is at least twenty degrees.
20 . The engine assembly of claim 18 , wherein an angle defined between a centerline of the initial plume and a centerline of the last plume is at least thirty degrees.