Aktiengesellschaft Kuhnle, Kopp & Kausch

Horst Pfeil

A variable control mechanism for a turbine engine, in particular an exhaust gas turbine of a turbocharger, with a ring of guide blades arranged concentrically around a rotor axle and pivoting around pivot axles between end limits. The pivot axles are arranged in the forward areas associated with the inflow edges of the guide blades; one of the end limits being variable by means of an adjusting ring or the like. Clearance and impact losses are incurred depending on the prevailing setting of the guide blades. The invention provides a guide mechanism which can be constructed inexpensively and which reduces clearance and impact losses. The guide blades are arranged such that they can pivot freely within an angular setting range defined by the end limits. In case of a low load the guide blades pivot freely within the predetermined end limits, and with rising loads they abut against the variable end limit.

Variable control mechanism

Method of increasing supercharge pressure at low full-load speed of an engine and for simultaneously limiting the supercharge pressure to a given value at high full-load speed of the engine, includes passing a flow of exhaust gas through a bladed rotor of an exhaust-gas turbine inwardly from the outside through respective entrances and exits of the rotor blades which, in the region of the entrances thereof, are disposed in a plane wherein the axis of the turbine is also disposed, so that a difference in a respective circumferential component of the velocity of the exhaust-gas flow between the blade entrance and the blade exit, taken with respect to the circumferential component of the exhaust-gas flow velocity at the blade entrance, is at least as great at low speeds of the engine as at higher speeds thereof.

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Darmstadt, Germany

Horst Pfeil