An exhaust-gas turbocharger (1) with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9), and which has a wastegate duct (10) between the turbine housing inlet (8) and the turbine housing outlet (9), and a shut-off element (13) for opening and closing the was
An exhaust-gas turbocharger (1) with a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9), and which has a wastegate duct (10) between the turbine housing inlet (8) and the turbine housing outlet (9), and a shut-off element (13) for opening and closing the wastegate duct (10). The shut-off element (13) comprises a sleeve (14), which is inserted into the turbine housing (2), and a piston (22), which is guided in the sleeve (14) so as to be movable along a longitudinal axis (L). The sleeve (14) has apertures (15, 16) at which the wastegate duct (5) opens out into the interior of the sleeve (14).
대표청구항▼
1. An exhaust-gas turbocharger (1) comprising: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9), andwhich has a wastegate duct (10) between the turbine housing inlet (8) and the turbine housing outlet (9), anda shut-off element (13) for opening and closing
1. An exhaust-gas turbocharger (1) comprising: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9), andwhich has a wastegate duct (10) between the turbine housing inlet (8) and the turbine housing outlet (9), anda shut-off element (13) for opening and closing the wastegate duct (10),whereinthe shut-off element (13) comprises a sleeve (14), which is inserted into the turbine housing (2), and a piston (22), which is located in the sleeve (14) so as to be slidingly movable along a longitudinal axis (L) within the sleeve (14) via piston rings (23) between an open position and a closed position,the sleeve (14) has a first aperture (15) in communication with the turbine housing inlet (8) and a second aperture (16) in communication with the turbine housing outlet (9), with a gap (20) between the sleeve (14) and turbine housing (2) dimensioned for thermal decoupling of the sleeve (14) and turbine housing (2), and with a sealing ring (21) arranged in the gap (20),the piston when in the closed position closes the first aperture (15) and the second aperture (16) to block exhaust flow through the sleeve (14), and when in the open position opens the first aperture (15) and the second aperture (16) for exhaust flow through the sleeve (14), andthe wastegate duct (10) communicates with the sleeve (14) parallel to the longitudinal axis (L) at the first aperture (15) and transversely with respect to the longitudinal axis (L) at the second aperture (16). 2. The exhaust-gas turbocharger as claimed in claim 1, wherein the sleeve (14) bears with a collar (17) against the turbine housing (2). 3. The exhaust-gas turbocharger as claimed in claim 1, wherein the sleeve (14) is closed off by means of a cover (18). 4. The exhaust-gas turbocharger as claimed in claim 1, further comprising a piston rod (24) which connects the piston (22) to an actuator. 5. An exhaust-gas turbocharger (1) comprising: a turbine housing (2) which has a turbine housing inlet (8) and a turbine housing outlet (9), andwhich has a wastegate duct (10) between the turbine housing inlet (8) and the turbine housing outlet (9), anda shut-off element (13) for opening and closing the wastegate duct (10),whereinthe shut-off element (13) comprises a sleeve (14), which is inserted into the turbine housing (2), and a piston (22), which is located in the sleeve (14) so as to be slidingly movable along a longitudinal axis (L) within the sleeve (14) via piston rings (23) between an open position and a closed position, the sleeve (14) has a first aperture (15) in communication with the turbine housing inlet (8) and a second aperture (16) in communication with the turbine housing outlet (9), with a gap (20) between the sleeve (14) and turbine housing (2) dimensioned for thermal decoupling of the sleeve (14) and turbine housing (2), and with a sealing ring (21) arranged in the gap (20), andthe piston when in the closed position closes the first aperture (15) and the second aperture (16) to block exhaust flow through the sleeve (14), and when in the open position opens the first aperture (15) and the second aperture (16) for exhaust flow through the sleeve (14). 6. The exhaust-gas turbocharger as claimed in claim 5, wherein the gap (20) is formed over the entire length of the sleeve (14) and over the full circumference about the longitudinal axis (L).
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이 특허에 인용된 특허 (10)
Gmignani Francois (Zone Industrielle la Palunette Bouches-du-Rhone ; Chateauneuf les Martigues FRX), Blocking valve.
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