| 摘要 |
A heating apparatus for a passenger compartment of a motor vehicle including a heater is provided with a bypass passage which bypasses an engine water jacket and an engine driven water pump, and a thermostat valve disposed between a feed passage from the engine water jacket and the heater so that the liquid from the engine water jacket is prevented from flowing into the heating circuit until the liquid temperature reaches to a predetermined level. A rapid warming up of the passenger compartment is enabled by forming a heating circuit with small water capacity through the bypass passage. |
