Method and system for engine water injection

A method comprising:

• injecting water stored at a water reservoir into one or more of an engine cylinder, an exhaust manifold, and a turbocharger turbine inlet via one or more water injectors of a water injection system based on engine operating conditions;
• responsive to a first condition, selectively supplying water stored at the water reservoir to one or more of a windshield wiper system, engine coolant system, and drinking water system based on respective water levels in the windshield wiper system, engine coolant system, and drinking water system;
• and
• responsive to a second condition, blocking the supply of water stored at the water reservoir to the one or more of the windshield wiper system, engine coolant system, and drinking water system regardless of the respective water levels in the windshield wiper system, engine coolant system, and drinking water system.

A system for water collection and distribution in a vehicle, comprising:

• a water reservoir fluidically coupled to a water collection system and a plurality of water-consuming devices, each of the water-consuming devices fed by a separate water passage branching from a common water delivery passage;
• a plurality of solenoid valves each coupled to a respective separate water passage to allow or restrict water flow to each of the water-consuming devices;
• a low pressure pump coupled to the common water delivery passage;
• a filter coupled to the common water delivery passage;
• a drain passage coupled to the common water delivery passage and the water reservoir with a drain valve coupled therein;
• a water level sensor coupled to the water reservoir configured to measure a level of water in the water reservoir;
• and
• a controller storing instructions executable to:
• allow water flow from the water reservoir to selected water-consuming devices of the plurality of water consuming devices based on the water level in the water reservoir by actuating open each respective solenoid valve in each respective separate water passage feeding each respective selected water consuming device;
• responsive to the water level in the water reservoir being greater than a first threshold water level, clean the water filter by actuating the drain valve to a position that allows flow from the common water delivery passage to the drain passage and blocks flow from the water reservoir to the low pressure pump and reversing a pumping direction of the low pressure pump;
• and
• responsive to the water level in the water reservoir being greater than a second threshold water level, refill the water reservoir with water from the water collection system.