Patent ID: 7694519
Filing Date: 2010-04-13
Classification: F02B,F02D,F16D,Y02T,Y10T

Abstract:
1. A method of forming a counter-rotating hydrodynamic retarder comprising: forming a working chamber of a hydrodynamic coupling by providing a primary impeller and a secondary impeller; filling the working chamber with a working medium; transmitting driving power from an exhaust gas turbine to a crankshaft of an internal combustion engine when the working chamber is filled with the working medium; and reversing a direction of rotation of the primary impeller or the secondary impeller by changing a direction of flow of an exhaust gas flow path of the internal combustion engine, wherein the primary impeller and the secondary impeller rotate in opposite directions with respect to each other in a first switching state, and wherein the primary impeller and the secondary impeller rotate in a same direction with respect to each other in a second switching state.