Lubrication system for direct injected engine

An internal combustion engine comprising a first cylinder formed in a first cylinder bank, a second cylinder formed in a second cylinder bank, the cylinder banks oriented in a V-shaped formation with the first cylinder bank being generally on a first side of the engine and the second cylinder bank being generally on a second side of the engine, a crankcase enclosing at least a portion of a crankshaft therein, the crankcase divided into at least a first crankcase chamber communicating with the first cylinder and a second crankcase chamber communicating with the second cylinder, a first lubricant insertion port opening into the first crankcase chamber from the second side of the engine, and a second lubricant insertion port opening into the second crankcase chamber from the first side of the engine.

An internal combustion engine comprising at least one variable volume combustion chamber, the combustion chamber being defined by at least a pair of components that move relative to each other, a crankcase at least partially enclosing a crankshaft therein and having an air guide, the air guide communicating with an air inlet device and adapted to conduct a flow of air into the crankcase, the crankshaft communicating with one of the combustion chamber components and adapted to rotate in a manner creating a swirling flow of air within the crankcase, and a lubricant insertion port, the port communicating with a source of lubricant and opening into the crankcase in a direction substantially opposite the swirling flow.

An internal combustion engine having at least one variable volume combustion chamber, the combustion chamber being defined by at least a pair of components that move relative to each other, a fuel injector communicating with the combustion chamber and adapted to direct a flow of fuel into the combustion chamber, a crankcase enclosing a crankshaft therein and having an air guide, the air guide communicating with an air inlet device and adapted to conduct a flow of air into the crankcase, the crankshaft connected to one of the combustion chamber components and adapted to rotate in a first rotation direction, a scavenge system adapted to supply air from the crankcase to the combustion chamber, and a lubricant supply system comprising an insertion port and a control mechanism, the insertion port communicating with a source of lubricant and adapted to conduct a flow of lubricant into the crankcase, the control mechanism adapted to regulate the volume flow of lubricant so that, during engine idle, about 20-55 cc/hr of lubricant is delivered to the crankcase.

An internal combustion engine having at least one variable volume combustion chamber, the combustion chamber being defined by at least a pair of components that move relative to each other, a fuel injector communicating with the combustion chamber and adapted to direct a flow of fuel into the combustion chamber, a crankcase enclosing a crankshaft therein and having an air guide, the air guide communicating with an air inlet device and adapted to conduct a flow of air into the crankcase, the crankshaft connected to one of the combustion chamber components and adapted to rotate in a first rotation direction, a scavenge system adapted to supply air from the crankcase to the combustion chamber, and a lubricant supply system comprising an insertion port and a control mechanism, the insertion port communicating with a source of lubricant and adapted to conduct a flow of lubricant into the crankcase, the control mechanism adapted to regulate the volume flow of lubricant during engine idle between a first delivery rate and a second delivery rate, the first delivery rate selected to supply a sufficient volume of lubricant to inhibit carbonization of the lubricant, the second delivery rate selected to supply a small enough volume of lubricant so that lubricant resistance to crankshaft rotation will not hinder engine start.

An internal combustion engine comprising a first cylinder formed in a first cylinder bank, a second cylinder formed in a second cylinder bank, the cylinder banks oriented in a V-shaped formation, a crankcase enclosing at least a portion of a crankshaft therein, the crankcase divided into at least a first crankcase chamber communicating with the first cylinder and a second crankcase chamber communicating with the second cylinder, the crankshaft configured to rotate in a first direction so as to create a swirling flow within each crankcase chamber, a first lubricant insertion port opening into the first crankcase chamber, the first port positioned so that a first lubricant flow path is defined generally along the swirling flow from the first port to the first cylinder, and a second lubricant insertion port opening into the second crankcase chamber, the second port positioned so that a second lubricant flow path is defined generally along the swirling flow from the second port to the second cylinder, wherein a length of the first lubricant flow path is generally the same as a length of the second lubricant flow path.