초록 ▼

A device for regulating the supercharging of an engine, of the type provided with a pressure limiting valve disposed in a branch of the supply duct of a turbine of the turbo compressor unit and operable to regulate the flow rate of gas supplied to the turbine. The valve is pneumatically controlled b

A device for regulating the supercharging of an engine, of the type provided with a pressure limiting valve disposed in a branch of the supply duct of a turbine of the turbo compressor unit and operable to regulate the flow rate of gas supplied to the turbine. The valve is pneumatically controlled by means of an actuator which detects the pressure difference between a first and a second chamber. The first chamber is connected to the atmosphere and the second chamber is connected with valve means for alternatively connecting this latter to the atmosphere and to an accumulator maintained at a substantially constant pressure different from atmospheric pressure, and for fluid tight sealing the second chamber, in such a way as to determine and then maintain in it a control pressure the value of which is variable continuously between that of the atmospheric pressure and that of the pressure in the said accumulator.

대표청구항 ▼

A device for regulating a turbo compressor unit (3) for supercharging an internal combustion engine (2), comprising: (a) a turbine (6) forming part of said turbo compressor unit (3), (b) a supply duct (9) connected to supply exhaust gas from said engine (2) to said turbine (6), (c) said supply duct

A device for regulating a turbo compressor unit (3) for supercharging an internal combustion engine (2), comprising: (a) a turbine (6) forming part of said turbo compressor unit (3), (b) a supply duct (9) connected to supply exhaust gas from said engine (2) to said turbine (6), (c) said supply duct (9) having a branch (13) connected to atmosphere, (d) a pneumatic pressure limiting valve (12, 12a) disposed in said branch (13) and operative to regulate the rate of flow of exhaust gas through said supply duct (9), (e) said pressure limiting valve (12, 12a) being connected to a unit forming two chambers (23, 24; 23a, 24a) therein, (f) an actuator (15, 15a) separating said two chambers (23, 24; 23a, 24a), (g) a stem (16, 16a) connecting said pressure limiting valve (12, 12a) with said actuator (15, 15a) so that a pressure difference between said two chambers (23, 24; 23a, 24a) causes said actuator (15, 15a) to move said stem (16, 16a) to thereby control said pressure limiting valve (12, 12a), (h) a first (24, 24a) of said two chambers being permanently connected to atmosphere so that said first chamber (24, 24a) is maintained at atmospheric pressure, (i) valve means (31, 32; 42) connected to the second (23, 23a) of said two chambers, and with said valve means having a portion connectable to atmosphere, (j) an accumulator (36) connected to a portion of said valve means and with said accumulator (36) being maintained at a substantially constant pressure different from atmospheric pressure, (k) and control means (34) connected to actuate said valve means (31, 32; 42) for: (1) connecting said second chamber (23, 23a) alternatively to atmospheric pressure and to said accumulator (36) at said constant pressure different from atmospheric pressure to provide a succession of transitory pressures within said second chamber (23, 23a), and for (2) fluid-tight sealing said second chamber (23, 23a) so that a control pressure is created and maintained therein which is continuously variable between the value of said atmospheric pressure and the value of said constant pressure existing in said accumulator (36).