| 摘要 |
<p>An arrangement for heating the service cabin of a machine driven by an internal combustion engine, includes a hydraulic pump which is driven by the engine and which pumps oil from the engine's oil reservoir and through an operating element, as for example a throttle, located between the hydraulic pump and the heat exchanger. The heat produced in the operating element and in the hydraulic pump effects an increase in temperature of the oil before reaching a heat exchanger, located in the service cabin, through which the heated oil is returned to the oil reservoir. The pumped oil may be selectively valved directly back into the oil reservoir for quickly heating the oil of the engine, and the hydraulic pump may be arranged for the taking of oil from the pressurized oil lines of the engine's lubricating oil distribution system rather than directly from the oil reservoir. The oil may bypass the heat exchanger through a pressure release valve so that the volume of oil heated by the operating element and by the hydraulic pump may be regulated to thereby regulate the temperature of the heat exchanger. Moreover, if the oil is sufficiently heated by the engine and by the hydraulic pump, it may be made to bypass the operating element by selective valving and, valving which is provided for returning the pumped oil directly to the oil reservoir and for bypassing the operating element may be thermostatically connected to either the oil reservoir or to the heat exchanger for controlling operation of the valves depending on the change in temperature of the oil at the oil reservoir or at the heat exchanger.</p> |
