Patent ID: 7458216

Claim:
An exhaust heat recovery apparatus comprising: a first cylinder; a second cylinder; a first piston and a second piston, which make reciprocating motions in the first cylinder and the second cylinder; a heat exchanger including a heater connected to the first cylinder, a regenerator connected to the heater, and a cooler connected to the regenerator and the second cylinder; a crank shaft connected to the first piston and the second piston with a connecting rod, and converting reciprocating motion into rotational motion; and a base supporting the first cylinder and the second cylinder, wherein the exhaust heat recovery apparatus is installed in an exhaust passage so that the heater is arranged in the exhaust passage which has a device installing surface and through which an exhaust exhausted from an internal combustion engine passes, and that the device installing surface and a heater connecting end surface of the first cylinder become parallel and the device installing surface and the cooler connecting side end surface of the second cylinder become parallel.