Quasi-steady-state control method for a vehicle automatic climate control

摘要

A motor vehicle automatic climate control determines HVAC parameter values for satisfying the required heating or cooling effort for steady-state cabin air temperature regulation, and controls the HVAC settings based such parameter values and on the deviation of the cabin air temperature (T_cabin) from the set temperature (TSET). If T_cabin is within a specified control band about TSET, the HVAC settings are controlled in accordance with the determined HVAC parameter values, but when T_cabin overshoots or undershoots the control band, the control enters a quasi-steady-state mode in which the control parameters are reset to drive T_cabin back in to the control band, and then brought into correspondence with the respective determined values based on the degree to which the overall control objective of regulating T_cabin at TSET is achieved.