초록 ▼

According to the present invention, in a heating apparatus having a viscous heater using viscous fluid for heating cooling water, when an engine rotational speed is lower than a set rotational speed relative to a temperature of viscous fluid, a viscous clutch is turned on to transmit a rotational dr

According to the present invention, in a heating apparatus having a viscous heater using viscous fluid for heating cooling water, when an engine rotational speed is lower than a set rotational speed relative to a temperature of viscous fluid, a viscous clutch is turned on to transmit a rotational driving force of the engine to a rotor of the viscous heater. In this way, a shearing force is applied to the viscous fluid in the heat-generating chamber, and the circulating cooling water is heated by generated heat of the viscous fluid to improve the heating capacity. When the engine rotational speed is higher than the set rotational speed relative to a temperature of viscous fluid, a viscous clutch is not turned on. Therefore, the rotational driving force of the engine is not transmitted to the rotor of the viscous heater, so that the shearing force is not applied to the viscous fluid to prevent the oil temperature of the viscous fluid from increasing excessively higher than 200.degree. C.

대표청구항 ▼

[ What is claimed is:] [1.] A heating apparatus for heating a passenger compartment of a vehicle having a water-cooled internal combustion engine, said heating apparatus comprising:a heating heat exchanger for heating said passenger compartment by heat-exchanging between cooling water having cooled

[ What is claimed is:] [1.] A heating apparatus for heating a passenger compartment of a vehicle having a water-cooled internal combustion engine, said heating apparatus comprising:a heating heat exchanger for heating said passenger compartment by heat-exchanging 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 having a rotor which rotates when a rotational driving force of said engine is applied thereto, a heat-generating chamber for sealing therein viscous fluid which generates heat when a shearing force generated by a rotational driving force of said rotor is applied thereto, and a cooling water passage in which the cooling water circulates between said engine and said heating heat exchanger, said heat-generating unit heating the cooling water to be supplied to said heating heat exchanger by generated heat of the viscous fluid in said heat-generating chamber;shearing state switching means for switching a shearing state of the viscous fluid by the rotational driving force from said engine to said rotor;detecting means for detecting a rotational speed of said rotor; anda heating control unit for controlling said shearing state switching means to reduce loads of said engine when the rotational speed of said rotor detected by said detecting means is more than a predetermined value.