System for heating the service cabin of a machine operated by an internal cumbustion engine

摘要

A heating system for the service cabin of a machine operated by an internal combustion engine includes a high-pressure supply pump for feeding oil from the engine oil sump through an oil conduit and returning it thereto, a pressure-reducing element in the conduit for elevating the temperature of the oil, a line by-passing the element and having a flow control valve therein, a heat exchanger connected into the conduit downstream of the element, the pump being located within the internal combustion engine together with its high pressure line to thereby confine any high pressure leaks from such line to the interior of the engine and its oil sump.