FIELD: engines and pumps.
SUBSTANCE: device for automatic control of fuel level in fuel chamber of carburettor includes the housing having side and horizontal walls, cover of fuel chamber, control station made in the form of Wheatstone bridge, which consists of power supply, switch, two solenoids, fixing piston with cylinder, and resistance thermostat. Solenoids and one of thermostats is located inside fuel chamber, and fixing piston with cylinder is located on one axis with fuel valve. In addition, logic unit and control channel is introduced into the device. Measuring output of Wheatstone bridge is connected to logic unit input, n-outputs of which are connected to n-second inputs of control channel, the first input of which is connected to power supply, and output is connected to the switch input. Logic unit consists of differentiating circuit, the first and the second threshold devices, signal setting device, OR element, shifting register, pulse generator, the first and the second AND elements, NOR element, counter, and n- decoders. Input of the logic unit is input of differentiating circuit and the first inputs of the first and the second threshold devices, the second inputs of which are connected to outputs of signal setting device, and outputs are connected to the first and the second inputs of OR element the output of which is connected to the second input of shifting register, the third input of which is connected to output of pulse generator the output of which is connected to the second input of the second AND element, output of differentiating circuit is connected to the second input of counter and to the first input of shifting register, the first and the second outputs of which are connected directly and through NOR element to the first and the second input of the first AND element the output of which is connected to the first input of the second AND element the output of which is connected to the first input of counter, the output of which is connected to inputs of n-decoders the outputs of which are n outputs of the logic unit. Control channel consists of in-series connected n switches, n resistances, as well as OR element; at that, the first and n-second inputs of control channel are respectively the first and the second inputs of n-switches the outputs of which are connected through n resistances to inputs of OR element the output of which is the output of control channel.
EFFECT: invention allows improving reliability, economy and process of automatic control of fuel level.
3 dwg
