| 摘要 |
PURPOSE: A hose tuner of a power steering device is provided to reduce a tuning time for reducing noise of the power steering device. CONSTITUTION: A microphone(10) is installed in a hydraulic pump(P). The microphone(10) measures noise to be generated by a driving of the hydraulic pump(P). A first laser wavelength detector(20) is installed in an outlet of the hydraulic pump(P). The first laser wavelength detector(20) measures a pulsation wavelength of hydraulic pressure from the hydraulic pump(P). A control unit(30) processes signals from the microphone(10) and the first laser wavelength detector(20) through an A/D converter and outputs a corresponding control signal. A tuning unit(40) comprises a T-shaped hose(41) connected with the hydraulic pump(P) through the first laser wavelength detector(20) and connected with a gear box; a piston(42) installed in a center pipe of the T-shaped hose(41); and an actuator(43) to vertically move the piston(42) by operating according to the control signal. The tuning unit(40) reduces the pulsation wavelength. A second laser wavelength detector(50) detects the reduced pulsation wavelength.
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