Exhaust heat recovery apparatus

An exhaust heat recovery apparatus comprising:

• a first cylinder;
• a second cylinder;
• a first piston and a second piston, which make reciprocating motion 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;
• and
• a crank shaft connected to the first piston and the second piston with a connecting rod, and converting the reciprocating motion into rotational motion,
• wherein the exhaust heat recovery apparatus is installed in a heat medium passage so that the heater is arranged in the heat medium passage which has a device installing surface and through which a heat medium passes, and that the device installing surface and a rotation axis of the crank shaft become parallel.

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;
• and
• a crank shaft connected to the first piston and the second piston with a connecting rod, and converting reciprocating motion into rotational motion,
• wherein the exhaust heat recovery apparatus is installed in a heat medium passage so that the heater is arranged in the heat medium passage through which a heat medium passes, and that a central axis of the heat medium passage and a rotation axis of the crank shaft become parallel.

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;
• and
• a crank shaft connected to the first piston and the second piston with a connecting rod, and converting reciprocating motion into rotational motion,
• wherein the exhaust heat recovery apparatus is installed in a heat medium passage so that the heater is arranged in the heat medium passage through which a heat medium passes, and that the first cylinder is arranged at an upstream side of a heat medium flow direction and the second cylinder is arranged at a downstream side of the heat medium flow direction.