SU1631280A1 - Device for fuel rate account - Google Patents

Description

The invention relates to measuring and accounting for the amount of liquid and can be used to account for fuel consumption in internal combustion engines and the consumption of liquid substances in various industries.

The aim of the invention is to improve the accuracy of accounting for fuel consumption.

The drawing shows a structural diagram of a device.

The device comprises a volumetric meter, consisting of a working chamber 1, an elastic separator 2 of variable cross-section, a varied ferromagnetic plate 3, induction sensors 4 and 5, signaling the movement of the plate 3, two pairs of switching valves 6 and 7. In addition, the device contains two formers 8 and 9 pulses, OR 10 circuit, trigger 11, first counter 12, first key 43, electromechanical counter 14, second 15 and third 16 keys, I-NOT 17 circuits, clock generator 18, analog-to-digital converter (ADC) 19, indicator 20 instant Flow rate of fuel, a descrambler 21, a second counter 22, a read only memory (ROM) 23, an amplifier 24 and temperature sensor 25.

A device for accounting fuel consumption works as follows.

When the engine is turned on, one of the outputs of trigger 11 (for example, the first output) sets the logic level 1, which is fed to the control input of key 15, the output of which is connected to the first control input of the volumetric meter, i.e. with the first pair of switching valves 6, which operate and block the fuel line at points (A) using ferromagnetic fluid, which is not critical to the purity of the fuel and ensures reliable and durable operation of the valves. Under the action of the fuel pump, the liquid along the line enters the chamber, which consists of two parts P and P ₂ .

Upon receipt, the liquid fills the volume P _and and the membrane 3 is deformed. As soon as the membrane 3 reaches its extreme position, a signal is generated using the sensor 5, which is fed to the input of the pulse shaper 9. From the output of the last signal enters through the circuit OR 10 to the input of the trigger 11 and the counting input ^{1 of the} first counter 12. Under the influence of this signal, the trigger 11 changes its state to the opposite,

those. at the first output, the logic level is set to 0, and at the second - 1, as a result of which the key 16 is opened, which leads to the actuation of the second pair of switching valves 7, which block the fuel line at points (B). The counter 12 registers the number of pulses from the sensors 4 and 5. The pulses from the output of the counter 12 are fed to the input of the key 13, from the output of which the signal goes to the electromechanical counter G4, which registers the total fuel consumption. Fuel _? passing through the highway, it washes the temperature sensor 25, the signal from which is fed to the amplifier 24, where it is amplified and fed to the second input of the ADC 19, the first input of which from the clock generator 18 receives clock pulses. At the end of the conversion, the second output of the ADC 19 has a digital stroke proportional to the temperature of the fuel at 10 ° C. The digital code from the output of the ADC 19 is fed to the input of the ROM 23 an equal code (E) to the fuel volume from its temperature, in which is written a digit equivalent to = V ^ = V _Q (1+ At + Bt * + Ct ³ ), where A, B, C - constant coefficients depending on the properties of the fuel;

t is the fuel temperature;

V is the initial fuel volume at 20 ° C,

The digital code (E) from the ROM 23 is supplied to the inputs of the counters 12 and 22. Information is recorded in the counters by the signal from the clock generator 18, which is formed from the signal End of conversion from the first output of the ADC 19. As a result of recording a digital code (E ) counters 12 and 22 change the conversion factor.

The counting input of the counter 22 receives a packet of pulses from the AND-NOT 17 circuit, which is formed from pulse signals, a clock generator 18 and 11. The code from the output of the counter 22 goes to the decoder 21 and then to the indicator 20. Thus, when the fuel temperature changes, the code on the output of the ROM 23 will change and adjust the conversion factor of the counters 12 and 22.

The invention allows more accurate accounting of fuel consumption, regardless of the ambient temperature.

Claims (1)

Claim A device for measuring fuel consumption, comprising a volumetric liquid meter and a temperature sensor installed in the pipeline, a key and an electromechanical meter, characterized in that, in order to improve the accuracy of accounting for fuel consumption, the first and second pulse shapers are introduced into it, the second and a third key, a serially connected amplifier, an analog-to-digital converter, a read-only memory, and a first counter connected to the control input of the first key by an output, series-connected circuit . OR, trigger, AND-NOT circuit, second counter, decoder and instant fuel consumption indicator, a clock connected to the second output of the analog-to-digital converter, and the first, second, third and fourth 5 outputs connected respectively to the second input of the AND circuit -NOT and to the sync inputs of the instantaneous fuel consumption indicator, analog-to-digital converter and a second counter, the preset inputs 10 of which are connected to the outputs of the permanent storage device, and the input of the resolution of the account is connected to the control the input of the second key and with the first output of the trigger, the input connected to the clock input of the first counter, and the second output to the control input of the third key, the outputs of the second and third keys are connected 20 respectively to the first and second control inputs of the volumetric meter, the first and second information outputs which through the corresponding pulse shapers are connected to the inputs of the OR circuit, the outputs of the temperature sensor are connected to the inputs of the amplifier.