| 主权项 |
1. A supercharging apparatus for an engine including:
a supercharger provided between an intake passage and an exhaust passage of the engine and configured to increase intake pressure in the intake passage, the supercharger including a compressor placed in the intake passage, a turbine placed in the exhaust passage, and a rotary shaft connecting the compressor and the turbine so that the compressor and the turbine are integrally rotatable; an intake bypass passage configured to bypass the intake passage downstream of the compressor and the intake passage upstream of the compressor; an air bypass valve configured to open and close the intake bypass passage, the air bypass valve serving as a pressure-operated valve arranged to be operated by introducing intake pressure from the intake passage, and provided with: a housing; an operating member configured to define the housing and form a capacity-variable pressure chamber; a valve seat provided in the intake bypass passage; a valve element integrally provided with the operating member and arranged to seat on the valve seat; and a spring arranged to urge the valve element in a direction to seat on the valve seat; a pressure passage for introducing the intake pressure to the pressure chamber; and a throttle valve provided to adjust an intake amount in the intake passage, the pressure passage being communicated with the intake passage downstream of the throttle valve, wherein the valve element is provided with a communication hole communicating the intake passage downstream of the compressor with the pressure chamber. |
