A vehicle includes an engine air intake having a humidity sensor, and a system having a nozzle positioned in the air intake and fluidly connected to a reservoir. The vehicle has a controller configured to activate the system to deliver fluid from the nozzle into the intake while the engine is inoperative and generate a diagnostic code in response to a change in humidity measured by the sensor being less than a threshold value. A method of controlling a vehicle includes measuring a baseline humidity (H1) using a humidity sensor in an air intake of an engine, and controlling a misting system to mist fluid from a reservoir into the air intake and adjacent to the humidity sensor while the engine is inoperative. The method measures a post-fluid delivery humidity (H2) using the humidity sensor, and generates a diagnostic code based on a comparison of H1 and H2.

A gravity-fed system for harvesting and storing clean drinking water in a vehicle is provided. The gravity-fed system includes a heat-exchanger and a reservoir adapted to receive gravity-fed water from the heat-exchanger. The gravity-fed system further includes a bottle receptacle fluidly connected to the reservoir to receive gravity-fed water from the reservoir. The gravity-fed system further includes a filter fluidly connected to and disposed between the reservoir and the bottle receptacle to filter gravity-fed water received from the reservoir.

Methods and systems are provided for adjusting a ratio of friction to regenerative brake effort and running an electric air conditioning compressor to collect condensed water for water injection into an engine. In one example, a method may include adjusting the air conditioning compressor load of the electric AC system and the ratio of friction to regenerative brake effort based on a water level in a water storage tank of the water injection system. Further, the method may include directing energy from regenerative braking to a battery and/or to the AC compressor in response to the battery state of charge.

An air-conditioning and humidity control system for a mobility vehicle that includes a cold air generating part configured to cool air by allowing the air to exchange heat with a refrigerant, a warm air generating part configured to heat air by allowing the air to exchange heat with the refrigerant, a moisture capturing part configured to capture condensate water generated by the heat exchange in the cold air generating part, and a moisture providing part configured to selectively transfer the condensate water captured by the moisture capturing part to the warm air generating part.

A vehicle temperature regulation system includes: a power unit including a motor driven by a supply of electrical power from a battery to cause wheels to rotate; a first cooling unit including a first heat exchanger disposed at a vehicle front side of the power unit, and a first circulation path that allows refrigerant to circulate between the power unit and the first heat exchanger to perform heat exchange; a second cooling unit including a second heat exchanger disposed at a vehicle rear side of the power unit, an air conditioning unit, a compressor, and a second circulation path that allows refrigerant to circulate between the second heat exchanger, the air conditioning unit, and the compressor to perform heat exchange; and a duct that interconnects the air conditioning unit and the battery and through which cool air or warm air is supplied from the air conditioning unit to the battery.

Methods and systems are provided for adjusting a position of an air recirculation valve of a HVAC system to adjust a ratio of ambient to recirculated air routed to an AC evaporator to collect condensed water for water injection into an engine. In one example, a method may include adjusting the position of the air recirculation valve of the HVAC system based on a water level in a water storage tank of the water injection system. Further, the method may include adjusting the position of the air recirculation valve of the HVAC system based on a determined humidity of the ambient air and a determined humidity of the recirculated air.

A vehicle air-conditioning system includes a cold-air circulation section in which indoor air of a vehicle is cooled via heat exchange with a refrigerant and is again supplied to a passenger compartment, a hot-air circulation section in which the indoor air is raised in temperature via heat exchange and is then again supplied to the passenger compartment, a purification circulation section in which the indoor air is introduced and purified and is then again supplied to the passenger compartment, and a refrigerant circulation section in which the refrigerant circulates to undergo heat exchange with the cold-air circulation section and the hot-air circulation section. The vehicle air-conditioning system separates an indoor air flow-path from an outdoor air flow-path to block outdoor air when performing air conditioning, and performs air conditioning of the passenger compartment using only the indoor air without entry of the outdoor air.

A humidifier system for a vehicle passenger cabin includes an onboard humidifier, an onboard reservoir in fluid communication with the humidifier and adapted to collect a fluid from a vehicle heat exchanger, and a controller configured to determine at least a passenger cabin relative humidity value and a dew point value for at least one vehicle window. The controller is configured to actuate the onboard humidifier to provide a humidified airflow into the passenger cabin, and to actuate a window heating system to heat the at least one vehicle window sufficiently to prevent or remove fogging resulting from the humidified airflow. Methods for controlling the humidifier system are described.

A lighting system using fluid for a vehicle includes: a first flow path configured in an interior part of the vehicle, and receiving fluid stored in the vehicle and guiding a flow of fluid; a lighting part disposed inside the vehicle to radiate light toward the first flow path; and a controller for receiving state information of the vehicle, and providing the state information of the vehicle to a passenger by controlling the flow of fluid flowing through the first flow path or the lighting part according to the state information.

A heating, ventilation, air conditioning and refrigeration (HVAC&R) unit includes an evaporator circulating a flow of refrigerant therethrough to cool a flow of compartment air flowing over the evaporator, and a condenser operably connected to the evaporator to condense the flow of refrigerant therethrough. The evaporator and the condenser are relatively positioned such that a liquid condensate at an exterior of the evaporator is directed by gravity onto an exterior of the condenser to increase an operating capacity of the condenser.