Abstract: A head restraint has a flexible tension strap, a forehead band and a shaped cushioning wedge member connected between the strap and the forehead band. The tension strap anchors the lower edge of the wedge member which acts as a fulcrum and the wedge member comprises structural integrity to be sufficiently rigid to act as a load arm to apply rearward load force on the forehead band against effort force applied against the front of the wedge member by the user's neck.

Abstract: 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.

Abstract: An engine assembly may include an engine block defining a cylinder bore, a cylinder head coupled to the engine block, a first intake valve, a fuel injector in communication with the cylinder bore and a spark plug in communication with the cylinder bore. The cylinder bore may define a first diameter. The cylinder head may define a first intake port and a first exhaust port in communication with the cylinder bore. The first intake valve may be located in the first intake port and may define a second diameter at least 35 percent of the first diameter. The fuel injector and the spark plug may be located centrally relative to the cylinder bore.