| 摘要 |
A system is provided for regulating the oil temperature of a diesel engine while the latter is in various operating modes. The engine includes a heat exchange unit through which a heat exchange medium circulates and while the engine is in certain operating modes, the system directs the oil flow through the heat exchange unit so that the oil is either heated or cooled by the circulating heat exchange medium. The system includes a valve housing provided with a cavity having an oil inlet port, first oil outlet ports connected to the heat exchange unit, and a second oil outlet port connected to a passage for bypassing the unit. Disposed within the cavity is an adjustable element for effecting interconnection between the inlet port and a selected outlet port. Adjustment of the valve element within the cavity is determined by the oil temperature during predetermined operating modes of the engine. When the engine is in a warm-up or first mode, the valve element interconnects the inlet port with a first outlet port, thereby effecting rapid heating of the oil by the circulating heat exchange medium. When the engine is in a second mode, the oil temperature is within a predetermined temperature range and the adjusted valve element effects interconnection between the inlet and second outlet ports causing the oil to bypass the unit. When the engine is operating in a third mode wherein the oil temperature is above the predetermined range, the valve element is adjusted so as to effect interconnection between the inlet and the other first outlet port, causing the oil to be cooled by the circulating heat exchange medium.
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