Oil injection lubrication system and methods for two-cycle engines

A method of determining an oil amount for a two-cycle engine, the method comprising:

• (A) determining engine speed and throttle position;
• (B) determining a basic oil amount for a first cylinder based upon a respective control map that defines the basic oil amount as a function of engine speed and throttle position;
• and
• (C) compensating the oil amount for the first cylinder based upon a function of at least one engine operation factor, wherein the engine operation factor is an induction air temperature, an atmospheric pressure, a battery voltage, an engine break-in period, a cylinder resting period, a load frequency coefficient, or a sensor failure.

A lubrication system for controlling oil delivery to the cylinders of an engine, the system comprising:

• means for supplying oil at a base rate;
• means for adjusting the base rate in relation to a throttle position to deliver an adjusted rate;
• and
• means for fine tuning the adjusted rate for each of a first and second cylinders to deliver a fine tuned rate to each of the first and second cylinders, wherein the fine tuned rate is different for the first cylinder than the fine tuned rate for the second cylinder.

A lubrication system for a two-cycle internal combustion engine, the lubrication system comprising:

• a positive displacement oil pump configured to supply oil;
• a solenoid valve unit configured to receive oil supplied by the positive displacement oil pump, the solenoid valve unit comprising at least one solenoid valve each solenoid valve being configured to regulate a flow of oil from the positive displacement oil pump to a cylinder;
• and
• an electronic control unit configured to control the solenoid valve unit to regulate the flow of oil based at least upon an engine operation factor, wherein the engine operation factor is an induction air temperature, an atmospheric pressure, a battery voltage, an engine break-in period, a cylinder resting period, a load frequency coefficient, or a sensor failure.