초록 ▼

The absence or shortage of a heat transfer medium can be detected without any time lag. While the medium is circulated through a water jacket and an exhaust gas heat exchanger which receives heat from the exhaust gas, heat generated by the engine can be recovered. A first sensor is provided at a was

The absence or shortage of a heat transfer medium can be detected without any time lag. While the medium is circulated through a water jacket and an exhaust gas heat exchanger which receives heat from the exhaust gas, heat generated by the engine can be recovered. A first sensor is provided at a waste heat recovering location in a circulation path of the medium. A second sensor is provided at a downstream side of sensor. When the medium is absent, a difference in measured temperature develops between sensor and sensor. A heat transfer medium shortage signal is outputted when the difference in the measured temperature between the first sensor and the second sensor exceeds a predetermined reference level.

대표청구항 ▼

1. A waste heat recovering apparatus for recovering the waste heat of an engine by circulating a heat transfer medium through a water jacket to cool the engine, said apparatus comprising: a first temperature sensor provided at a waste heat recovering location across the circulation path of the hea

1. A waste heat recovering apparatus for recovering the waste heat of an engine by circulating a heat transfer medium through a water jacket to cool the engine, said apparatus comprising: a first temperature sensor provided at a waste heat recovering location across the circulation path of the heat transfer medium; a second temperature sensor provided downstream of the first temperature sensor across the circulation path; and a means for providing a heat transfer medium shortage signal when a difference in the temperature measurement between the first temperature sensor and the second temperature sensor is greater than a predetermined reference level. 2. A waste heat recovering apparatus for an engine according to claim 1, wherein the heat transfer medium is further conveyed to an exhaust gas heat exchanger which receives heat from the exhaust gas of the engine.3. A waste heat recovering apparatus for an engine according to claim 1 or2, wherein at least either the first temperature sensor or the second temperature sensor is placed at a location where the air tends to stagnate in the circulation path.4. A waste heat recovering apparatus for an engine according to claim 1, wherein the first and second temperature sensors are a couple of temperature sensors provided in a fail-safe system.