초록 ▼

In a heating apparatus for an automotive vehicle including an evaporator disposed within an engine exhaust pipe; a condenser disposed within a heat core; and a looped heat pipe for feeding medium vapor (e.g. steam) from the evaporator to the condenser and medium liquid (e.g. water) from the condense

In a heating apparatus for an automotive vehicle including an evaporator disposed within an engine exhaust pipe; a condenser disposed within a heat core; and a looped heat pipe for feeding medium vapor (e.g. steam) from the evaporator to the condenser and medium liquid (e.g. water) from the condenser to the evaporator, the heating system comprises, in particular, a vapor pressure sensor; a vapor temperature sensor; a controller for detecting abnormal heat cycle condition on the basis of detected vapor pressure and temperature sensors; at least one exhaust gas bypass flapper; and a flapper actuator for actuating the flapper at such a position that exhaust gas is bypassed away from the evaporator in response to a presence of the stop signal from the controller. In case cracks are formed on both the evaporator and condenser sides, since there exists such a danger that exhaust gas is introduced into the vehicle room, when heat cycle condition is detected as being abnormal on the basis of detected vapor pressure and temperature, the flapper is so actuated that the evaporator will not be heated by exhaust gas to disable the heating system. Further, it is preferable to immediately discharge exhaust gas introduced into the heat pipe to the engine intake manifold in response to the stop signal.

대표청구항 ▼

A heating apparatus for an automotive vehicle, comprising: (a) an evaporator disposed within an engine exhaust passage; (b) a condenser disposed within a heat core facing a vehicle room; (c) a looped heat pipe composed of a vapor feed pipe for feeding medium evaporated by said evaporator to said con

A heating apparatus for an automotive vehicle, comprising: (a) an evaporator disposed within an engine exhaust passage; (b) a condenser disposed within a heat core facing a vehicle room; (c) a looped heat pipe composed of a vapor feed pipe for feeding medium evaporated by said evaporator to said condenser and a liquid return pipe for returning medium condensed by said condenser to said evaporator; (d) a vapor pressure sensor disposed in said vapor feed pipe, for detecting medium vapor pressure; (e) a vapor temperature sensor also disposed in said vapor feed pipe, for detecting medium vapor temperature; (f) a controller connected to said vapor pressure and temperature sensors, for detecting abnormal heat cycle condition on the basis of medium vapor pressure and temperature detected by said vapor pressure and temperature sensors and generating a stop signal whenever an abnormal heat cycle condition is detected; (g) a first exhaust gas bypass flapper disposed on an upstream side of said evaporator; and (h) a flapper actuator connected to said controller, for allowing said first bypass flapper to be pivoted so that exhaust gas is blown against said evaporator in response to an absence of the stop signal from said controller but to be pivoted so that exhaust gas is bypassed away from said evaporator in response to a presence of the stop signal from said controller.