| 摘要 |
A turbo-charger system is provided to allow a boost pressure to quickly return to a normal state by preventing a wastegate valve from being opened through actuating a boost control valve when rapid acceleration occurs in high load conditions. A turbo-charger system comprises a wastegate valve(13) and an expandable tank(25). The wastegate valve is installed at the bypass port is connected with an actuating rod(33) of a diaphragm valve(17) mounted at the front end of a negative pressure pipe(15). The expandable tank has an extension pipe(21) and a high pressure pipe(23) branching from one side of the extension pipe. An air compressor(29) generates compressed air. A boost control valve(31) is mounted at one end of the extension pipe to move the actuating rod under the control of a controller(37). A boost pressure sensor(41) detects boost pressure at an outlet of an impeller. A throttle position sensor(39) detects an opening angle of a throttle value according to an operation of an accelerator pedal.
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