Volkswagen Ag

Peter Hellmann

Jochen Westhaeuser

Karsten Helms

Stefan Schmitt

Sven Twenhoevel

Cornelia Scheel

A heat pump for a motor vehicle includes a refrigerant circuit with a refrigerant, an ambient heat exchanger, a compressor, a heating heat exchanger, and a throttle. A method for operating the heat pump includes determining an expected start time of a charging process of a motor vehicle battery and determining a maximum dew point undershoot and/or a maximum frost mass and operating the heat pump such that the maximum dew point undershoot and/or the maximum frost mass are reached within a predefined time period before the expected start time.

Method for operating a heat pump for a motor vehicle and heat pump

An air-conditioning system for a motor vehicle includes a coolant circuit, through which it is possible to pump coolant with the aid of a compressor, the air-conditioning system having a torque-determining unit for determining a drive torque required for operating the compressor as a function of a temperature of air, which has flowed past an evaporator integrated into the coolant circuit for evaporating coolant, a pressure of the coolant prevailing in the coolant circuit in front of the compressor relative to a flow direction of the coolant or an actuating signal for setting a settable compressor stroke of the compressor.

Growing community of inventors

Cremlingen, Germany

Peter Hellmann