Abstract: 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.

Abstract: A solenoid valve is arranged in a bypass passage of an engine cooling water circuit to selectively open and close the bypass passage. A temperature sensor is arranged in a vehicle cabin heating water circuit to monitor water temperature therein. A control unit is designed so that when the temperature sensor senses that the temperature of water in the vehicle cabin heating water circuit is below a predetermined level, the solenoid valve is closed, thereby increasing the flow rate of water in the vehicle cabin heating water circuit.

Abstract: For the purpose of eliminating toxic compounds from exhaust gases emitted from fuel burners, boilers, furnaces and heat engines, an improved fuel burning apparatus is proposed in which fuel is combusted in the presence of a hot mixture of water vapor and oxygen gas produced through catalytic exothermic decomposition of hydrogen peroxide. The fuel burning apparatus will find numerous practical applications, preferred ones of which include provision in steam engines, gas and steam hybrid power plants and turbines.