Motor vehicle air conditioning system computes evaporator temperature demand value and derives compressor input signal value from estimated input signal feedback and feedback terms

摘要

The system has a compressor and evaporator in a coolant circuit and an evaporator temperature sensor. There are devices for computing an evaporator temperature demand value and for computing a compressor input signal value from an equation containing an estimated input signal term and a feedback computation term. The system has a compressor (2) and an evaporator (5,6) in a coolant circuit (1) and a sensor (13) for detecting the evaporator temperature. The compressor can vary its discharge capacity in response to an input signal and the evaporator is arranged in a path for the fluid to be cooled with a heat absorption function. The system has a device (18) for computing a demand value for the evaporator temperature and a device (17) for computing a compressor input signal value from an equation containing an estimated input signal term and a feedback computation term.