| 主权项 |
1. A fuel system, comprising:
an internal combustion engine that receives an air/fuel mixture and produces heated exhaust air, the internal combustion engine including first and second exhaust manifolds that respectively provide first and second heated exhaust air paths; a fuel device that receives fresh air and provides the air/fuel mixture that is received by the internal combustion engine; a heat exchanger that
receives the heated exhaust air from the internal combustion engine and fresh cool air,transfers heat energy from the heated exhaust air to the fresh cool air,provides the fresh air to the fuel device, the provided fresh air being the fresh cool air that has received the heat energy, andincludes:
a first air path that corresponds to the fresh air provided to the fuel device, the first air path including a straight path from a first side of the heat exchanger to a second, opposing side of the heat exchanger,a second air path that corresponds to the first heated exhaust air path,a third air path that corresponds to the second heated exhaust air path,a first separator disposed between the first and second air paths;a second separator disposed between the first and third air paths; anda third separator disposed between the second and third air paths, a thermal conductivity of the third separator being lower than a thermal conductivity of the first or second separator; a first set of end caps coupled to the heat exchanger including an inlet and an outlet corresponding to the first air path; a second set of end caps coupled to the heat exchanger including an inlet and an outlet corresponding to the second air path; and a third set of end caps coupled to the heat exchanger including an inlet and an outlet corresponding to the third air path, wherein the third separator is disposed such that the inlet and the outlet of the second air path is at a first side of the third separator and the inlet and the outlet of the third air path are at a second, opposing side of the third separator, the second and third air paths are independent and flow in a same direction through the heat exchanger towards an exhaust port, the first air path defines a first axis, the second air path defines a second axis orthogonal to the first air axis, the third air path defines a third axis spaced from and parallel to the second axis, a fourth axis is defined as normal to the first, second and third axis, and the first separator is disposed over the third separator which is disposed over the second separator along the fourth axis. |
