Motor Assembly

摘要

A motor assembly for a motor vehicle includes an internal combustion engine that has an exhaust gas purification device and a heat engine. The heat engine has at least one closed working space that is filled with a gas. The at least one closed working space includes first and second cylinders, which are each movably mounted in the longitudinal direction between initial and expansion positions. The heat engine includes at least one heating unit for heating the gas in at least one heating region of the closed working space and at least one cooling unit for cooling the gas in at least one cooling region of the closed working space. The gas heated in the heating region pushes the first piston from its initial position into its expansion position, and then flows through the overflow line into the cooling region such that the second piston is then pushed into its expansion position. The overflow line leads at least in sections through the exhaust gas purification device.

主权项

1. An engine assembly for a vehicle having an internal combustion engine which has an exhaust-gas purification apparatus, the engine assembly having a heat engine comprising:
at least one closed-off working chamber which is filled with a gas, the at least one closed-off working chamber includes a first cylinder in which a first piston is mounted so as to be movable in a longitudinal direction between a first initial position and a first expansion position, wherein the at least one closed-off working chamber further includes a second cylinder in which a second piston is mounted so as to be movable in the longitudinal direction between a second initial position and a second expansion position, at least one heating device for heating the gas in at least one heating region of the at least one closed-off working chamber, at least one cooling device for cooling the gas in at least one cooling region of the at least one closed-off working chamber, and at least one flow transfer line which connects the at least one heating region and the at least one cooling region in terms of gas flow, wherein the at least one flow transfer line is configured such that gas that is heated in the at least one heating region can displace the first piston from the first initial position into the first expansion position, and wherein said gas can then subsequently flow through the flow transfer line into the cooling region and displace the second piston into the second expansion position, wherein the first piston and the second piston are coupled such that the second piston is moved from the second initial position into the second expansion position in temporally offset fashion with respect to the first piston, and such that, during a movement of the second piston from the second initial position into the second expansion position, the first piston is moved in the direction of the first initial position, and wherein the flow transfer line is led at least in sections through the exhaust-gas purification apparatus such that an exchange of heat takes place between the exhaust-gas purification apparatus and the gas flowing in the flow transfer line.