Source of water for water injection system

A method of operating an air compressor, the method comprising:

• compressing ambient air using an air compressor to convert the ambient air to compressed air and water;
• combusting a fuel-air mixture in an internal combustion engine to power the air compressor;
• separating the water from the compressed air exiting the air compressor in a separating assembly;
• discharging the compressed air from the separating assembly such that the compressed air is directed away from the internal combustion engine and towards an on-demand user application;
• collecting the water from the separating assembly;
• and
• feeding a portion of the collected water to the fuel-air mixture and the internal combustion engine with a water injection system for combustion in the internal combustion engine.

An air compressor system comprising:

• an air compressor operable to draw in ambient air and compress that air to produce a flow of compressed air and water;
• an engine coupled to the air compressor and operable in response to the combustion of a flow of fuel to power the air compressor;
• a moisture separator assembly coupled to the air compressor and arranged to receive the flow of compressed air and water, the moisture separator assembly operable to separate a portion of the water from the flow of compressed air and water and to discharge a flow of compressed dry air and a separate flow of liquid water;
• an air passageway coupled to the moisture separator assembly and positioned to receive the flow of compressed dry air, the air passageway directs the flow of compressed dry air away from the engine toward an on-demand user application;
• a reservoir positioned to receive the flow of liquid water;
• a water injection system coupled to the engine and operable to draw water from the reservoir and inject that water into the engine for combustion;
• and
• a controller operable to vary the quantity of water delivered to the engine.