Apparatus for supplying fluid of preset quantity

An apparatus for supplying fluid of preset quantity comprising:

• a fluid supplying pump provided in a fluid supplying pipe arrangement;
• a motor for driving said fluid supplying pump;
• metering means for metering the fluid flowing in said fluid supplying pipe arrangement;
• presetting means for presetting a quantity of fluid to be supplied;
• and
• control means coupled to said motor, said metering means, and said presetting means, for detecting that supplied quantity of fluid measured by said metering means has reached a quantity smaller than the preset fluid supplying quantity preset by said presetting means by an estimated oversupply quantity of fluid, and stopping said motor from being driven,
• said estimated oversupply quantity of fluid being a quantity equal to a quantity of fluid supplied by said fluid supplying pump after said motor is stopped from being driven and rotates due to inertia,
• said control means including a first register prestored with a coefficient, and estimating means for estimating said estimated oversupply quantity of fluid from said coefficient stored in said first register.