Controlled turbocharger with integrated bypass
First Claim
1. A turbocharger comprising:
- a turbine wheel (9);
a turbine casing (8) defining a turbine wheel chamber having a wheel chamber inlet port and an outlet port, said turbine casing further including;
at least one casing inlet port (10) for receiving exhaust gas,at least first and second scroll passages (13, 14) open toward an inlet port of a turbine wheel chamber and dimensioned for directing exhaust gas flow from said casing inlet port to said turbine wheel chamber,at least one upstream casing outlet upstream of said turbine wheel,at least one downstream casing outlet downstream of said turbine wheel for discharging exhaust gas from said turbine wheel chamber; and
a rotary control valve (1) provided between said casing inlet and said at least first and second scroll passages, said rotary control valve rotatable between (a) a position at which at least one scroll passage is blocked and said upstream casing outlet is blocked, (b) a position at which no scroll is blocked and said upstream casing outlet is blocked, and (c) a position at which no scroll passage is blocked and said upstream casing outlet is not blocked,wherein said control valve is rotatable about a central axis, said valve including a disk-shaped base (2) and a control surface (4) provided upon said base, said control surface for selectively blocking or exposing at least one of said first and second scroll passages, said disk including an aperture (7) which can be positioned in registry with said outlet upstream of said turbine wheel for permitting exhaust gas flow to bypass said turbine wheel (9).
1 Assignment
0 Petitions
Accused Products
Abstract
A rotary valve (1) particularly suitable for use in a turbocharger for an internal-combustion engine, the rotary valve provided between a turbocharger inlet port (10) and at least first and second scroll passages (13, 14), the rotary valve rotatable between (a) a position at which at least one scroll passage is blocked and a bypass outlet is blocked, (b) a position at which no scroll passage is blocked and the bypass outlet is blocked, and (c) a position at which no scroll passage is blocked and the bypass outlet is not blocked. The control valve is rotatable about a central axis, includes a disk-shaped base (2) and a control surface (4) provided upon said base, the control surface preferably being generally wedge shaped, and the disk optionally having an aperture (7) for communication with the bypass outlet. The rotary valve is preferably mounted on both sides via a shaft (112a, 112b) extending through the axis of rotation.
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Citations
18 Claims
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1. A turbocharger comprising:
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a turbine wheel (9); a turbine casing (8) defining a turbine wheel chamber having a wheel chamber inlet port and an outlet port, said turbine casing further including; at least one casing inlet port (10) for receiving exhaust gas, at least first and second scroll passages (13, 14) open toward an inlet port of a turbine wheel chamber and dimensioned for directing exhaust gas flow from said casing inlet port to said turbine wheel chamber, at least one upstream casing outlet upstream of said turbine wheel, at least one downstream casing outlet downstream of said turbine wheel for discharging exhaust gas from said turbine wheel chamber; and a rotary control valve (1) provided between said casing inlet and said at least first and second scroll passages, said rotary control valve rotatable between (a) a position at which at least one scroll passage is blocked and said upstream casing outlet is blocked, (b) a position at which no scroll is blocked and said upstream casing outlet is blocked, and (c) a position at which no scroll passage is blocked and said upstream casing outlet is not blocked, wherein said control valve is rotatable about a central axis, said valve including a disk-shaped base (2) and a control surface (4) provided upon said base, said control surface for selectively blocking or exposing at least one of said first and second scroll passages, said disk including an aperture (7) which can be positioned in registry with said outlet upstream of said turbine wheel for permitting exhaust gas flow to bypass said turbine wheel (9). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A turbocharger comprising:
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a turbine wheel (9); a turbine casing (8) defining a turbine wheel chamber having a wheel chamber inlet port and an outlet port, said turbine casing further including; at least one casing inlet port (10) for receiving exhaust gas, at least first and second scroll passages (13, 14) respectively open toward an inlet port of a turbine wheel chamber and dimensioned for directing exhaust gas flow from said casing inlet port (10) to said turbine wheel chamber, at least one upstream casing outlet upstream of said turbine wheel, at least one downstream casing outlet downstream of said turbine wheel for discharging exhaust gas from said turbine wheel chamber; and a rotary valve (1) provided between said casing inlet and said at least first and second scroll passages (13, 14), said rotary control valve (1) rotatable between (a) a position at which at least one scroll passage is blocked and said upstream casing outlet is blocked, (b) a position at which no scroll passage is blocked and said upstream casing outlet is blocked, and (c) a position at which no scroll passage is blocked and said upstream casing outlet is not blocked, wherein said rotary valve (1) is rotatable about a central axis, said valve including a disk-shaped base (2) and a control surface provided upon said base (4), said control surface dimensioned for selectively blocking at least one of said first and second scroll passages and said upstream casing outlet. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification