JPS6176133U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic sectional view showing the main parts of one embodiment of this invention, Fig. 1a is an explanatory diagram of the main part operation of the device shown in Fig. 1, and Fig. 2 is another embodiment of this invention. FIG. 3 is a schematic sectional view showing an example of a conventional supercharging pressure control device. 1...Turbo charger, 2...Compressor, 3
...Turbine, 4...Combustion chamber, 5...Intake passage, 6...Exhaust passage, 7...Bypass, 8...Wastegate valve, 20...Wastegate valve actuator, 21...Housing, 22...Diaphragm, 23
...first pressure chamber, 24...second pressure chamber, 25...pressure response device, 26...valve rod, 27...valve body, 28...diaphragm, 29...housing.

Claims (1)

[Scope of utility model registration request] A bypass is separated by a diaphragm from an exhaust passage for supplying exhaust gas from the combustion chamber of the engine to the turbine of the turbocharger to an exhaust passage downstream of the turbine, and introduces supercharging pressure from the compressor of the turbocharger. A device for controlling the opening and closing of a waste gate valve driven by a diaphragm actuator having a first pressure chamber opened to the atmosphere and a second pressure chamber opened to the atmosphere, thereby controlling the supercharging pressure from the compressor, The first
A boost pressure control device equipped with a pressure response device to release a portion of the boost pressure introduced into the pressure chamber into the atmosphere.