| 摘要 |
A drive unit of the type that includes an internal combustion engine and a waste-heat turbine unit that has a compressor, a secondary turbine, and an exhaust-gas turbine with hollow blades, within which the kinetic and heat energy of the exhaust gases are utilized in a superimposed work process is improved by forming the blades as pipes of at least an approximately circular cross section increases the degree of efficiency by better utilization of the kinetic energy of the exhaust gases in the exhaust-gas turbine by increasing the difference between the entering and exiting speeds thereof. In accordance with preferred embodiments, the pipes forming the turbine blades can be arranged in one circular ring or in multiple concentric rings. Additionally, the profile of the outer circumference of the blade-forming pipes, in accordance with one embodiment, is shaped to increase the flow resistance thereof. |
