Patent ID: 7603857

Claim:
An exhaust heat recovery apparatus comprising: a first piston; a second piston; a high-temperature cylinder in which the first piston reciprocates; a low-temperature cylinder in which the second piston reciprocates, a central axis of the high-temperature cylinder being approximately parallel to a central axis of the low-temperature cylinder, and the high-temperature cylinder and the low-temperature cylinder being positioned approximately orthogonal to a crankshaft and constituting an α-type inline two-cylinder stirling engine; and a heat exchanger including a heater, a regenerator and a cooler, where the heater having an approximately U-shape, one end portion being secured to a side of the high-temperature cylinder, and the other end portion being arranged to a side of the regenerator, the regenerator having one end portion being arranged to a side of the heater, and the other end portion being arranged to a side of the cooler, the cooler having one end portion being arranged to a side of the regenerator, and the other end portion being secured to the low-temperature cylinder, heat medium flowing a direction approximately parallel to the crankshaft, wherein the regenerator is shiftable along a regenerator-side end face of the cooler with respect to a direction approximately orthogonal to a central axis of the low-temperature cylinder and a direction pointing from the high-temperature cylinder to the low-temperature cylinder.