A method of operating a vehicle climate system includes, by a controller, responsive to a same blower motor request, operating a blower motor at a first speed responsive to a heater core isolation valve (HCIV) directing coolant used to heat a cabin to an engine. The method further includes, by the controller, responsive to the same blower motor request, operating the blower motor at a second speed less than the first speed responsive to the HCIV directing the coolant to an electric heater and not to the engine.

System, methods, and other embodiments described herein relate to assisting in closing a trunk door of a vehicle by leveraging a Heating, Ventilation and Air-conditioning (HVAC) system in the vehicle. In one embodiment, a method includes detecting a position of the trunk door, and when the position of the trunk door is an open position, determining whether to activate the HVAC system to reduce air pressure in a trunk of the vehicle, where the trunk and the HVAC system are fluidly connected by an air duct. The method includes, in response to determining to activate the HVAC system to reduce air pressure in the trunk, pumping air out of the trunk through the air duct such that at least some of any increased air pressure caused by a trunk door closure is removed from the trunk. The method includes, when the position of the trunk door has changed from the open position to a closed position, deactivating the HVAC system to stop pumping air out from the trunk.

This disclosure describes a system and method for displaying an indicator when temperature and fan adjustments occur which may cause passengers potential discomfort. Discomfort may be caused by deviations of expected air temperature, fan speed, or both. For example, when a desired temperature is set to seventy-two degrees Fahrenheit (72° F.), colder air at sixty degrees Fahrenheit (60° F.) may be used to bring down the temperature within the vehicle which may be at ninety degrees Fahrenheit (90° F.). The temperature difference between the desired temperature of seventy-two degrees Fahrenheit (72° F.) and the incoming air at sixty degrees Fahrenheit (60° F.) may be above a threshold comfort level, such as two degrees Fahrenheit (2° F.). When this happens, the system may provide the indicator to the passengers. Indicators for a fan speed may also be shown when discomfort may exist. Through these indicators, the passengers may recognize that the threshold for comfort has been exceeded.

A method of operating a vehicle climate system includes, by a controller, responsive to a same blower motor request, operating a blower motor at a first speed responsive to a heater core isolation valve (HCIV) directing coolant used to heat a cabin to an engine. The method further includes, by the controller, responsive to the same blower motor request, operating the blower motor at a second speed less than the first speed responsive to the HCIV directing the coolant to an electric heater and not to the engine.

Systems and methods for vehicle air and humidity regulation based on tear film monitoring are provided. A vehicle system may include a camera configured to capture one or more images of a vehicle occupant. A logic device may be configured to detect a tear film breakup of the vehicle occupant based on the one or more images captured by the camera. An air system module configured to identify an air system setting adjustment based on the tear film breakup detected by the logic device. A heating, ventilation, and air condition (HVAC) system may be configured to adjust an air system setting of the vehicle based on the air system setting adjustment. Associated methods are also provided.

A vehicle includes a traction battery, an electric machine powered by the traction battery and configured to power wheels of the vehicle, and a thermal-management system. The thermal-management system includes a battery loop, a cabin heating loop, and a valve configured to fluidly connect the battery loop and the cabin heating loop when in a first position and configured to fluidly isolate the battery loop and the cabin heating loop when in a second position. A controller is programmed to, responsive to (i) battery heating being requested, (ii) a temperature of the battery being greater than a lower threshold, and (iii) cabin heating being requested, actuate the valve to the first position to heat a cabin and the battery.

The invention provides an air-conditioner for maintaining a temperature of a conditioned space at or near a set temperature. The air-conditioner comprises at least one rotating or reciprocating element adapted to rotate or reciprocate at a variable frequency. The variable frequency including one or more nuisance frequencies at which vibration or noise within the air-conditioner or the conditioned space causes a nuisance. A processor programmed to control variation of the variable frequency in response to operational requirement. The processor is configured to operate the at least one rotating or reciprocating element so as to substantially exclude operation at the one or more nuisance frequencies.

A passenger transport vehicle contains an air conditioner which has a refrigerant circuit operated using a refrigerant. The refrigerant circuit has a condenser with a fan for conveying cooling air and an evaporator for controlling the temperature of supply air conveyed by a supply fan into a passenger compartment. Flow ducts for the cooling air and for the supply air are fluidically separated from one another inside the air conditioner by a partition wall. The partition wall has a degassing device being switched between a closed state for normal operation of the air conditioner and an open state for emergency operation of the air conditioner, in which emergency operation the degassing device fluidically connects the flow duct for the cooling air and the flow duct for the supply air to one another. A refrigerant detector is provided and when it detects the refrigerant, it triggers actuation of the degassing device.

A method for operating a temperature control fan integrated in an air guiding system, the method includes steps of: determining a current volume flow generated by a flow generator of the temperature-control fan within a detection region, and then adjusting at least one operating parameter of the temperature-control fan according to the determined current volume flow within the detection region.

Systems and methods are disclosed for supporting and executing automated control of climate comfort settings based on user classification within a group identity database. Methods of generating and employing the group identity database are also disclosed.