| 摘要 |
PURPOSE:To secure the safety of steerage by controlling a driving level of a motor at a time when a level of oil in a reservoir tank is approximated to the threshold value, and when the oil level is reached to the threshold value and output is continuously given from a switching circuit, making the drive of a pump so as to be stopped. CONSTITUTION:When an oil level in a reservoir tank 1 drops and comes nearer to the level of a reed switch 3, an intermittent signal is transmitted to the input of a delay circuit 11 of an output control mans 20, and a monostable multivibrator 13 operates after the specified time, thus a notice-warning lamp PL1 is lighted. In addition, an FET 2 is conducted and divided voltage is transmitted to a time constant circuit 15, driving force of a motor 8 is reduced via a comparator 18. Moreover, when an oil level is dropped to some extent and a reed switch 3 comes to a state of being turned on continuously, both switching FET 3 and 4 are driven by a delay circuit 16 of a drive stopping means 21, and a warning lamp PL2 is lighted. Moreover, in accordance with output of a time constant circuit 17, the drive of the duty motor 8 is gradually stopped via the comparator 18. |
