Electronic climate control system for automotive vehicles

An electronic climate control system for an automotive vehicle comprising:

• a by-pass passage for delivering cool air flowing through the evaporator core directly to a discharged-air ventilator;
• a by-pass door provided at a communication inlet of said by-pass passage, for adjusting a flow rate of cool air through said by-pass passage;
• a hot-water valve provided for adjusting a flow rate of hot coolant to a heater core;
• an actuator being common to said by-pass door and said hot-water valve, for adjusting a bypass-door opening and a water-valve opening, said actuator having a drive arm mechanically linked directly to both said by-pass door and said hot-water valve so that an operating range of said by-pass door is wider than an operating range of said hot-water valve, and so that the operating range of said hot-water valve is embraced in the operating range of said by-pass door, and so that said by-pass door is shifted from a fully-closed position to a full-open position when shifting from a first angular position of said drive arm to a second angular position of said drive arm and that said hot-water valve is shifted from a full-open position to a fully-closed position when shifting from a third angular position defined between said first and second angular positions to said second angular position;
• switching means for selecting one of discharged-air outlet modes;
• detection means for monitoring said bypass-door opening;
• and
• control means configured to be electronically connected to said actuator for automatically limiting the bypass-door opening to a predetermined value less than a maximum opening, which is equivalent to a full-open position of said by-pass door, when a predetermined discharged-air outlet mode is selected by said switching means.

An electronic climate control system for an automotive vehicle comprising:

• a by-pass passage for delivering cool air flowing through an evaporator core directly to a discharged-air ventilator;
• a by-pass door provided at a communication inlet of said by-pass passage, for adjusting a flow rate of cool air through said by-pass passage;
• a hot-water valve provided for adjusting a flow rate of hot coolant to a heater core;
• an actuator, mechanically linked directly to both said by-pass door and said hot-water valve, for adjusting a bypass-door opening and a water-valve opening so as to fully close said hot-water valve when said by-pass door is fully opened;
• a cooler air passage arranged parallel to the heater core for delivering cool air flowing through the evaporator core to an air mix chamber;
• an air mix door pivotally provided in said cooler air passage for controlling a blend of evaporator core air and heater core air delivered to the air mix chamber;
• switching means for selecting one of discharged-air outlet modes;
• detection means for monitoring the bypass-door opening;
• and
• control means configured to be electronically connected to said actuator for automatically limiting the bypass-door opening to a value contained within a predetermined door opening range less than and close to a maximum opening, which is equivalent to a full-open position of said by-pass door, to hold the bypass-door opening within the predetermined opening range and to hold said hot-water valve partly opened when said switching means selects an air temperature control mode, which is based on a temperature deviation from a target in-car temperature, from the discharged-air outlet modes.