초록 ▼

A pneumatically controlled altitude compensating boost control for maintaining a constant intake manifold pressure on a turbocharged engine having a wastegate valve for selectively bypassing engine exhaust gas around the turbine. The altitude compensating boost control comprises an altitude compensa

A pneumatically controlled altitude compensating boost control for maintaining a constant intake manifold pressure on a turbocharged engine having a wastegate valve for selectively bypassing engine exhaust gas around the turbine. The altitude compensating boost control comprises an altitude compensating bleed valve means which varies the compressor outlet pressure in the control in response to the change in ambient pressure and a wastegate actuator which is responsive to the ambient pressure and the varied compressor outlet pressure.

대표청구항 ▼

A turbocharger for an internal combustion engine having an inlet manifold and an exhaust manifold, said turborcharger comprising: a compressor housing having an inlet opening and an outlet opening, said outlet opening being connected to the inlet manifold of said engine for supplying charger air to

A turbocharger for an internal combustion engine having an inlet manifold and an exhaust manifold, said turborcharger comprising: a compressor housing having an inlet opening and an outlet opening, said outlet opening being connected to the inlet manifold of said engine for supplying charger air to said engine; a turbine housing having an inlet opening and a outlet opening and a chamber intermediate said inlet and said outlet openings forming a bypass conduit therebetween, the inlet opening of said turbine housing being connected to the exhaust manifold of said engine for receiving exhaust gases therefrom; a compressor wheel mounted on said shaft in said compressor housing between said compressor and outlet openings; a turbine wheel mounted on said shaft in said turbine housing between said turbine inlet opening and said turbine outlet openings; valve means slidably mounted in an opening in said turbine housing, said valve means having a head portion and a stem portion, said head portion forming selective sealing means for said bypass conduit; and an altitude compensating bypass control means including a source of control fluid, an altitude compensating bleed valve for varying the pressure of said control fluid, and an actuator means having a flexible wall means separating said actuator means into a first and a second chamber, said wall means attached to said valve means for selectively moving said valve head portion with respect to said bypass conduit, said first chamber being connected to said source of control pressure and said second chamber being vented to ambient.