초록 ▼

A viscous heater for heating cooling water for cooling a water cooled engine is disposed in a cooling water circuit, and a front heater core is disposed in the cooling water circuit at a downstream side of the viscous heater with reference to a flow direction of the cooling water. Only when a heatin

A viscous heater for heating cooling water for cooling a water cooled engine is disposed in a cooling water circuit, and a front heater core is disposed in the cooling water circuit at a downstream side of the viscous heater with reference to a flow direction of the cooling water. Only when a heating operation is the maximum heating operation or the maximum heating operation is desired, a viscous clutch is turned on to transmit a driving force of the engine to the viscous heater. When the maximum heating operation is not desired, the viscous clutch is turned off so that the driving force of the engine is not transmitted to the viscous heater. Therefore, a load of the engine is reduced, and the cost for running the vehicle can be lowered.

대표청구항 ▼

[ What is claimed is:] [1.] A heating apparatus for heating a passenger compartment of a vehicle having a water-cooled engine, comprising:a duct for blowing air into said passenger compartment;a heating heat exchanger disposed in said duct, for heating said passenger compartment by heat-exchange bet

[ What is claimed is:] [1.] A heating apparatus for heating a passenger compartment of a vehicle having a water-cooled engine, comprising:a duct for blowing air into said passenger compartment;a heating heat exchanger disposed in said duct, for heating said passenger compartment by heat-exchange between cooling water having cooled said water-cooled engine and air to be blown into said passenger compartment;a heat-generating unit using a shearing force, said heat-generating unit including a rotor which rotates when a driving force is applied thereto and a heat-generating chamber for sealing therein viscous fluid which generates heat for heating said cooling water to be supplied to said heating heat exchanger when a shearing force generated by a rotational force of said rotor is applied to said viscous fluid;a driving force transmission unit for transmitting a driving force of said engine to said rotor;a heating control unit for controlling said driving force transmission unit in such a manner that said heat-generating unit is operated only when a heating operation of said passenger compartment is the maximum heating operation or the maximum heating operation for said passenger compartment is desired;an air-mixing damper for adjusting a ratio between an amount of air passing through said heating exchanger and an amount of air bypassing said heating heat exchanger.wherein said heating control unit includes:temperature setting means for setting a temperature of said passenger compartment to a desired value;environmental condition detecting means for detecting an environmental condition having an influence on the heating operation;target air temperature calculating means for calculating a target temperature of air to be blown into said passenger compartment through said duct based on at least a set temperature set by said temperature setting means and an environmental condition detected by said environmental condition detecting means; anddamper opening calculating means for calculating a target damper opening degree of air-mixing damper based on a target air temperature calculated by said target air temperature calculating means,wherein said heating control unit operates said heat-generating unit only when said target damper opening degree calculated by said damper opening calculating means corresponds to the maximum heating operation.