SU1242744A1 - Device for measuring fuel consumption in internal combustion engine - Google Patents

Abstract

This invention relates to test apparatus for internal combustion engines. The purpose of the invention is to improve accuracy when expanding the functionality of the device and automating the measurement process - a scientific research institute, where measurement is carried out in the engine supply line with fuel when the drain is off and the pressure and temperature parameters of the fuel stabilize. The device contains a system for stabilizing fuel parameters when the drain line is disconnected. The meters and recorders, as well as the control element, are connected to the microprocessor controlling the operation of the device. pcs., 1C i4 tc 4a F

Description

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The invention relates to a measuring technique, and more specifically to a measuring device for the consumption of liquid fuel in a vehicle internal combustion engine.

The aim of the invention is to measure measurement accuracy while expanding the functionality of the device and automating the measurement process;

The drawing shows a diagram of the proposed device.

The device contains a fuel tank I, a standard fuel pump 2, pumping fuel from tank 1 to engine 3, filter 4 installed between pump 2 and engine 3, line 5 diverting unused fuel with pressure regulator valve 6, pressure sensor 7 fuel and the output of the counting device 8,

The device contains a microprocessor 9, connected via an executive relay 10 with a shut-off jupan 11 installed parallel to the sensor 7 of fuel consumption in the discharge line 17., and the shut-off valve 13 in the line 5 of the unused fuel. The device comprises a fuel pressure stabilization system 14, a fuel temperature sensor 15, a tacho generator 16 connected to the engine shaft 3, a torque sensor 17, a tacho generator 18, analog-to-digital converters 19, a digital pressure sensor 20 and a fuel pressure sensor 21 . The thyristor converter 22 is connected to the electric motor 23, connected via a reducer 24 to a fuel consumption sensor 7. The motor 25 is connected to the power source 26 and to the sensor 7 via a gearbox 24 n overrunning clutch 27.

When measuring, the microprocessor 9 uses a cherez executive relay 10 closes a shut-off valve 11 installed parallel to the flow sensor 7 in the discharge line 12 and the shut-off valve 13 in the 5 line of unused fuel, after which all fuel consumed by the engine 3 passes through the flow sensor 7 At the same time, the pressure, which is fed to the engine 3, is regulated with the fuel pressure stabilization system 14.

Electrical signals from fuel temperature sensor 55, tachogenerato12427442

ra 16; ksh-hematically associated with the shaft. Depart.p.3 ,, the torque sensor 17 on the motor shaft ..11 3 and the tachogenerator 18, which is kinematically connected with the flow sensor 7., Is fed through an acalo-diffraction transformer. 19 to the microprocessor 9, which counts volumetric and weight fuel consumption, engine power 10 and 3, and specific fuel consumption per unit-1 of a moprad and gives the results obtained to the digital printing device 20.

Pressure stabilization system 14 J5 is dead depending on the signal value of fuel pressure sensor 21. With the help of a thyristor voltage converter 22, it changes the supply voltage of the electric motor 23, which is nematically connected through a gearbox 24 to the fuel consumption sensor 7. Electric motor 25, electrically connected to the source of power supply W-26 and kinematic axes associated with the date of 25 times the top of the brew. through the gearbox 24 and the overrunning clutch 27, maintaining the pressure of the fuel supplied to the engine 3 and the rotational uniformity of the fuel consumption sensor 7 at tjQ good speed and abrupt load drops from the engine 3 and is automatically switched off clutch 27 when the engine 3 is under load.

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After completing the measurements, microprocessor 9 opens the shut-off quickly operating valves, P and 13, as a result of which the regular engine system 3 is restored.

To connect the device to the standard fuel system of the internal combustion engine 21, it is sufficient to perform the following operations: disconnect the discharge line and connect the inlet and outlet nozzle of the device; disconnect the unused fuel outlet line 5 and, in the explosion, connect the branch pipe with the shut-off valve, install the sensor 17 to the torque and the tachogenerator 16 speed :; rotation of the motor shaft; Plug in the IS.TOCH.NIK 26 power supply to the network; connect the output of the fuel pressure sensor 2 to the pressure stabilization system 14 5 and the outputs of the remaining sensors and tachogenerators to the inputs of analog-digital converters 19; connect the outputs of analog-digital conversion. Depart.p.3 ,, the torque sensor 17 on the motor shaft ..11 3 and the tachogenerator 18, which is kinematically connected with the flow sensor 7., Is fed through an acalo-diffraction transformer. 19 to the microprocessor 9, which counts volumetric and weight fuel consumption, engine power 3 and specific fuel consumption per unit-1 of a moprad and gives the results obtained to the digital printing device 20.

Pressure stabilization system 14 5 is highly dependent on the signal value of the fuel pressure sensor 21. With the help of a thyristor voltage converter 22, it changes the voltage of the power supply to the electric motor 23, which is nematically connected via a gearbox 24 to the fuel consumption sensor 7. The electric motor 25 is electrically connected to the source of power supply W-26 and the kinematic axes are associated with a date of 5 times 7 top.piva. through the gearbox 24 and the overrunning clutch 27, maintaining the pressure of the fuel supplied to the engine 3 and the rotational uniformity of the fuel consumption sensor 7 at tjQ good speed and abrupt load drops from the engine 3 and is automatically switched off clutch 27 when the engine 3 is under load.

After completing the measurements, microprocessor 9 opens the shut-off quickly operating valves, P and 13, as a result of which the regular engine system 3 is restored.

To connect the device to the standard fuel system of the internal combustion engine 21, it is sufficient to perform the following operations: disconnect the discharge line and connect the inlet and outlet nozzle of the device; disconnect the unused fuel outlet line 5 and, in the explosion, connect the branch pipe with the shut-off valve, install the sensor 17 to the torque and the tachogenerator 16 speed :; rotation of the motor shaft; Plug in the IS.TOCH.NIK 26 power supply to the network; connect the output of the fuel pressure sensor 2 to the pressure stabilization system 14 5 and the outputs of the remaining sensors and tachogenerators to the inputs of analog-digital converters 19; connect the outputs of analog-to-digital converters 19 to the inputs of the microprocessor 9; connect microprocessor 9 with digital printing device 20; connect the pressure stabilization system 14, the microprocessor 9 and the digitizer 20 to the power supply 26.

Installing the device does not change the engine's fuel system, as the shut-off valves are open and the fuel enters the engine, the flow sensor is unused, and the flow sensor is unused. fuel flows into the tank along the standard drain line. The normal fuel system is changed only after the shut-off valves are closed.

The presence of shut-off valves in the device allows for the measurement time to close the line of unused fuel, to send fuel through the flow sensor installed in the delivery line and to measure the actual volume, and in combination with the temperature sensor, consumed by the internal combustion engine, while the system has stabilized pressure; The fuel maintains the required pressure of the top Liva supplied to the internal combustion engine in all its operating modes, including transients.

A gearbox with interchangeable gears, an overrunning clutch and an adjustable power supply of one of the electric motors of the pressure stabilization system expand the range of fuel consumption measurement and ensure the possibility of using the proposed device in all operating modes of internal combustion engines with a power of 200 to 4000 hp. the use of a tachogenerator, the output of which is proportional to the flow rate of the measured fuel, and remote electric control of shut-off high-speed valves provide the possibility of being switched on and the proposed device in automated measurement systems .. s

The microprocessor allows you to automate the measurement control process, and in combination with sensors, analog-to-digital converters and a digital printing device provides automatic data collection and processing of results according to a given

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The program, as well as the issuance of all non-bypass indicators, including the specific fuel consumption per unit of engine power required by the standards.

Claims (1)

/ Invention Formula A device for measuring fuel consumption in an internal combustion engine, comprising a fuel tank, a fuel pump located between the tank and the engine, a filter, a fuel consumption sensor with an output counting device, a controllable valve, pressure and temperature sensors installed in the fuel supply line engine, pressure regulating valve and controlled valve installed in the line of unused fuel, sensor, variable torque torque, tachogenerator, analog-to-digital converter, digital printing device The power source and microprocessor associated with the fuel consumption sensor, temperature sensor, digital printer and power source, are characterized in that, in order to improve the measurement accuracy when expanding the functionality of the device and automating the measurement process, a thyristor converter is added to the device , actuating relay, electric motors, pressure stabilization system of fuel supplied to the engine, containing a gearbox equipped with interchangeable gears and an overrunning clutch and kinematically connected with the fuel consumption sensor and electric motors, one of which is connected to the gearbox via the overrunning clutch and electrically connected to the power source, and the other directly to the gearbox and connected to the output of the thyristor voltage converter whose input is electrically connected to the output of the pressure sensor and power source, the controlled valves are cut off, and their inputs are electrically connected to the output of the executive relay connected to the microprocessor, the sensor The fuel consumption is made in the form of an axial-piston hydraulic motor and kinematically connected with a tachogenerator, the output of which is electrically connected to the microprocessor via an analog-to-digital converter. . Editor P.Kossey Compiled by N..Patrakaltsev Tehred O. Gortvay Proofreader M. Pojo Order 3690/37. Circulation 778 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing site, Uzhgorod, Projecto st., 4