Abstract: A Stirling engine includes an engine main body including at least an engine unit and a cooler heat exchanger, and a heater structure including at least a heater heat exchanger. The engine main body and the heater structure have separate structures, and the engine main body and the heater structure are connected via a coupling pipe portion.

Abstract: A Stirling engine including a crosshead mechanism includes a low-pressure space and a high-pressure space. In the high-pressure space, a piston is driven by a heating/cooling cycle of a working fluid. The low-pressure space accommodates a crosshead portion connected to the piston via a piston rod, and a crank mechanism that rotates a crankshaft along with movement of the crosshead portion. A high-pressure gas seal in which a lip angle of a seal lip on the high-pressure side is smaller than that on the low-pressure side is provided around the piston rod at a partition between the low-pressure space and the high-pressure space.

Abstract: A Stirling engine includes an engine main body including at least an engine unit and a cooler heat exchanger, and a heater structure including at least a heater heat exchanger. The engine main body and the heater structure have separate structures, and the engine main body and the heater structure are connected via a coupling pipe portion.

Abstract: An exhaust gas purification device having a DPF provided in an exhaust system of an internal combustion engine. The device has one or more sound pressure measurement means for measuring exhaust sound pressure and calculation means for calculating the amount of PM accumulation based on the exhaust sound pressure measured. On the upstream side of the DPF are arranged exhaust gas temperature measurement means and exhaust gas temperature raising means. The exhaust gas temperature raising means is activated when the amount of PM accumulation calculated by the calculation means is higher than a preset default and at the same time when the exhaust gas temperature measured by the exhaust temperature measurement means is lower than a lower limit of a temperature region in which the DPF can be regenerated.

Abstract: In an embodiment of an exhaust gas purification apparatus, when an accumulation amount of particulate matter in a DPF (33) exceeds a predetermined amount and an exhaust gas temperature of an engine is lower than a restoration operable temperature, an intake air amount reducing operation is executed by an air intake throttling device (24) provided for an air intake pipe (21) of the engine, and a heating operation is executed by an electric heater (34) provided upstream from the DPF (33), thereby increasing the exhaust gas temperature to the restoration operable temperature to start a restoration operation of the DPF (33).

Abstract: An exhaust gas purification device (101, 102, 103) having a DPF (33) provided in an exhaust system (30) of an internal combustion engine. The device has one or more sound pressure measurement means (8F, 8R) for measuring exhaust sound pressure and calculation means (10) for calculating the amount of PM accumulation based on the exhaust sound pressure measured. On the upstream side of the DPF (33) are arranged exhaust gas temperature measurement means (36) and exhaust gas temperature raising means (34). The exhaust gas temperature raising means (34) is activated when the amount of PM accumulation calculated by the calculation means (10) is higher than a preset default and at the same time when the exhaust gas temperature measured by the exhaust temperature measurement means (36) is lower than a lower limit of a temperature region in which the DPF (33) can be regenerated.

Abstract: In an embodiment of an exhaust gas purification apparatus, when an accumulation amount of particulate matter in a DPF (33) exceeds a predetermined amount and an exhaust gas temperature of an engine is lower than a restoration operable temperature, an intake air amount reducing operation is executed by an air intake throttling device (24) provided for an air intake pipe (21) of the engine, and a heating operation is executed by an electric heater (34) provided upstream from the DPF (33), thereby increasing the exhaust gas temperature to the restoration operable temperature to start a restoration operation of the DPF (33).