초록 ▼

Apparatus and method for controlling a vehicular temperature conditioning system in response to temperature conditioning demand, outdoor ambient air temperature, discharge air temperature, and vehicle engine oil pressure which is indicative of the rotational speed of a clutch and shaft drivingly con

Apparatus and method for controlling a vehicular temperature conditioning system in response to temperature conditioning demand, outdoor ambient air temperature, discharge air temperature, and vehicle engine oil pressure which is indicative of the rotational speed of a clutch and shaft drivingly connecting the temperature conditioning system to the vehicle engine. A cooling mode is initiated if (1) the return air (comfort zone) temperature exceeds a predetermined maximum value, (2) the outside ambient air temperature exceeds a predetermined limit, and (3) the rotational speed of the clutch and drive shaft, as indicated by the vehicle engine oil pressure, is less than a predetermined limit. During operation in the cooling mode, a reheat cycle is initiated in response to the return air temperature and the discharge air temperature. The reheat cycle is terminated rapidly in response to the discharge air temperature, and being of relative short duration and repetitive in nature thereby minimizes temperature overshoot in the comfort zone, due to the thermal inertia of the heater.

대표청구항 ▼

A method for controlling a temperature conditioning system including a vapor compression air conditioner and a heater for use in a vehicle, said method comprising the steps of (a) sensing the temperature of air discharged from the system into the interior of the vehicle, at a point downstream of the

A method for controlling a temperature conditioning system including a vapor compression air conditioner and a heater for use in a vehicle, said method comprising the steps of (a) sensing the temperature of air discharged from the system into the interior of the vehicle, at a point downstream of the heater; (b) sensing the temperature conditioning demand in the interior of the vehicle; and (c) activating the heater in a reheat mode to heat air cooled by the air conditioner, said reheat mode being activated in response to the temperature conditioning demand; and further, de-activating the heater to terminate the reheat mode if the discharge air temperature increases above a setpoint value, whereby the temperature conditioning demand in the interior of the vehicle is satisfied without excessive reheat overshoot resulting from the thermal inertia of the heater.