| 摘要 |
A heater system for the passenger compartment of a motor vehicle comprises a number of heat exchange elements 11a, 11b, 11c, 11d arranged in a stack. Flow of engine coolant through each of the heat exchange elements is individually controlled by valve means 5 having a coolant inlet 30 and a coolant outlet 34 and which includes a valve member 27 which can progessively open the flow of coolant to the heat exchange elements by uncovering staggered supply orifices 35a, 35b, 35c, 35d. The heat exchange elements are in parallel with a bypass passage which allows flow from the coolant inlet to the coolant outlet through a bypass orifice 36. The bypass orifice becomes progressively blocked as the valve member 27 uncovers the supply orifices.
|
