Patent ID: 6886800
Filing Date: 2005-05-03
Classification: B29C,B29L,F02D,Y10T

Abstract:
1. A production method for a butterfly valve ( 1 ) for an internal combustion engine, this butterfly valve ( 1 ) comprising a valve seat ( 4 ) engaged by a butterfly body ( 5 ) keyed on a shaft ( 6 ) in order to rotate between an open position and a closed position under the action of an electric actuator ( 3 ) coupled to this shaft ( 6 ) by means of a geared transmission ( 8 ) which ends in a final gear ( 18 ) keyed on the shaft ( 6 ), the shaft ( 6 ) being coupled to a position sensor ( 23 ) provided with a rotor ( 24 ) rigid with the shaft ( 6 ) and a stator ( 25 ) disposed to face the rotor ( 24 ), this method being characterised in that it comprises the stages of disposing the shaft ( 6 ) and the rotor ( 24 ) of the position sensor ( 23 ) coaxial with the shaft ( 6 ) in a mould ( 30 ), injecting plastic material into this mould ( 30 ) in order to fill the mould ( 30 ) and producing, by moulding, the butterfly body ( 5 ) keyed on the shaft ( 6 ) and the final gear ( 18 ) keyed on the shaft ( 6 ) and incorporating the rotor ( 24 ) of the position sensor ( 23 ).