SU838353A1 - Fuel flow meter - Google Patents

Description

54) FUEL FLOW METER

one

The invention relates to a measurement technique and can be used to measure the specific fuel consumption of engines. internal combustion, for example, per unit of engine power.

A fuel flow meter is known, containing a scale and a fuel tank mounted on them, connecting pipes with a fuel tank and an engine ll V ,, -

The disadvantages of this flow meter are insufficient accuracy and speed of measurement.

The closest in technical essence to the present invention is a fuel flow meter comprising a speed sensor, a weighing device with electro-valves, counting decades, an automation unit, a power supply unit and a display 2.,

The disadvantages of this flow meter are also low measurement accuracy and speed.

The purpose of the invention is to improve the accuracy and speed of measurement. Magnitude

fuel consumption per engine power unit.

The goal is achieved by the fact that a torque sensor is additionally inserted into the fuel meter, which contains an engine speed sensor, a control unit with counting decades, an automation unit connected to a fuel consumption sensor that includes a control unit with solenoid valves, and a weighing device. moment, software and computing device with the indicator, the first and second switch, analog-to-qi (} phy converter, distributor-converter, dimmer, distributor-driver and time converter intervals, while the torque sensor and the sensor are connected via the first switch, analog-to-digital converter, split {) switch-converter and the second switch to the computing device, which is connected to the software device, the decoder, and counting decades connected to the second KOMMyrarqDOM, the software device and the time interval generator, KOTqpbrik is connected to the power supply block, the software device, the electric valve control unit and the automation unit connected to the first unit a mutator, an analog-digital converter, and, through a software device and a distributor driver, to the second switch that is connected to the distributor by a converter converter, a remote controller, an automation unit, and a software device connected to the decoder.

The drawing shows a schematic diagram of the fuel flow meter,

The fuel flow meter consists of a torque sensor 1, a speed sensor 2, an input signal switch 3 (first switch), an analog-digital converter 4, a distributor - 20 converter 5, a decoder 6, a switch 7, a distributor-former 8, a software device 9, counting decades of Yu, the former 11 time intervals, the automation unit 12, 25 the electrovalve control unit 13, the weighing device 14, the electrovalve 15 and 16, the power unit 17 and the computing device (WU) 18,

The flow meter works as follows 30 times.

The initial operating state of the flow meter is standby mode. The position of the valves 15 and 16 is such that the fuel from the fuel tank directly enters the pump 35 of the engine under test. At the moment the measurement starts, the operator pressing the start button turns the flow meter into operation. The electric valves control system is turned on, the valves are switched to 40 so that the fuel to the engine pump begins to flow from the measuring tank installed on the weight device 14 of the solenoid control system. As the fuel consumption of the balance arrow passes the contactless sensor of the beginning of the measurement, triggering pulses are sent to the unit 12 psi and shaper 11 time intervals.

The shaper 11 time intervals produces a sequence of rectangular pulses corresponding to the selected time interval, for example, 0.1 s, 55

This sequence is applied to the first decade 1O, which produce signals corresponding to the time signals.

intervals, for example, tenths, units, and tens of seconds. Simultaneously with the start of the time interval generator, the automation unit starts operation, starting analog-digital converter 4, connected through the input switch 3 to the torque sensor 1. A constant voltage from the torque sensor, converted by an analog-to-digital converter to a binary-decimal code, is fed to the output of the converter's distributor 5.1. When the conversion is finished, the analog-to-digital converter issues an "End of Conversion" signal to the automation circuit. By this signal, the switch 7 starts the software device 9 and alternately, starting with the higher bit, through the decoder 6 sends to the keyboard of the computing device 18 electrical pulses corresponding to the measured torque value, which is memorized (for example, A,). At the same time, the input switch switches the 2 turn sensor to the analog-to-digital converter.

The conversion of turns into digital form is carried out similarly to the conversion of torque, but unlike him, before sending the numerical values of the turns, the program device issues a computing device a control pulse to the multiplication and the numerical value of the turns brought to memory (for example, A2). Then, according to the control signals of the software device, the result of multiplication (A x A, M xn) is divided by a factor. 716,2, a high-speed distributor spreader,

A X A

The result of the calculation / 2 N

U 7f6,2 /

- MX n.,

 IL, H - equal power and hp, developed by the engine under test, is stored in the memory (for example, A5) of the computing device.

In this state, the flow meter waits for the end of the fuel consumption from the tank, measured by experience (grams).

Claims (2)

At the moment when the scale arrow passes the contactless sensor of the end of the measurement, the formation of time intervals ceases. The control panel receives control pulses corresponding to the numerical value of the weight of fuel consumed for the experience Gi. Then, the automation circuit, together with the software device, sends control dividing pulses and the current fuel consumption time from the counting decades 1O to the keyboard of the HEU. The elapsed time T is stored in a memory (e.g., Al) of a computing device. As a result of these actions, the value of 36OO -.- TPP g / s is found in the RAM. Immediately after this, the ao y equal to the signals of the software device on the keyboard of the slave unit receives a division signal, and the value A x .e is extracted from the memory (Aj). the specific fuel consumption g -3600 .cr is calculated. top.716.2 The resulting value of O is stored in a memory (for example, Hell). Simultaneously with the transformation of the formation of time intervals, the control circuit of the solenoid valves shifts the valves to the open state, thus achieving the automatic filling of the measuring capacity. At the moment of the backward passage of the arrow of the weighing device past the sensor of the beginning of the measurement of fuel, the filling valve is closed, all ring counters of the counting decades, the software device and the switch are set to zero. The flow meter is in the initial state. On the light panel of the solenoid valve control circuit, the aeiropa signal is “Ready for metering.” The proposed flow meter reduces the number of experiments required to obtain Accurate results when witnessing internal combustion engines, as well as reducing the number of service personnel. At the same time, energy and fuel savings are observed. Claims of Invention A fuel flow meter comprising an engine speed sensor, a control unit with 8 3A decade counting, an automation unit connected to a fuel consumption sensor including an electric valve control unit, and a weighing device, characterized in that, in order to measure accuracy and speed of measurement magnitudes of fuel consumption per unit of engine power; a torque sensor, a software and a computing device with an indicator, the first and second switch, and Aloh-digital converter, distributor converter, decoder, distributor driver and time interval former, the torque sensor and the speed sensor are connected via the first switchboard, analogue digital converter, distributor transmitter and the second switchboard to the computing device, which is connected to the software device, a decoder and counting decades connected to the second switchboard, software device and time pulse generator, which It is connected to a power supply unit, a software device, an electrical valve control unit and an automation unit connected to the first switch by an analog-to-digital converter and through a software device and p: distributor-form a second switch that is connected to the distributor-converter, a decoder, an automation unit and a software device connected to the decoder. Sources of information, taken into account np: i examination 1, Likachev V. S. Tests of tractors. M ,, Mechanical Engineering, 1974. 2. Fuel flow meter. Passport D1.0O.OO.OO PS NP Pribor. The Ministry of Trials and Agriculture on Mechanical Engineering, 1975 (prototype). 220g50r t