SU932321A1

SU932321A1 - Device for measuring average indicator pressure in piston engine cylinder

Info

Publication number: SU932321A1
Application number: SU803006057A
Authority: SU
Inventors: Юрий Александрович Магнитский; Валерий Давидович Карминский; Николай Николаевич Чешков; Ирина Матвеевна Каплунова
Original assignee: Ростовский-на-Дону институт инженеров железнодорожного транспорта
Priority date: 1980-11-21
Filing date: 1980-11-21
Publication date: 1982-05-30

Description

Изобретение относится к приборостроению и может быть использовано при диагностике поршневых двигателей.The invention relates to instrumentation and can be used in the diagnosis of piston engines.

Известно устройство для раздельного индицирования основной петли цикла сжатие-расширение и насосных потерь поршневого двигателя £l).A device is known for separately displaying the main loop of the compression-expansion cycle and pump losses of the piston engine £ l).

Недостатком известного устройства является наличие коллекторного выключателя, скорость, вращения щетки которого в два раза меньше скорости вращения коленчатого вала двигателя.A disadvantage of the known device is the presence of a collector switch, speed, rotation of the brush which is half the speed of rotation of the crankshaft of the engine.

Наиболее близким к предлагаемому является устройство для измерения среднего индикаторного давления в цилиндре поршневого двигателя, содержащее датчик давления, связанный с входом усилителя, резистор, функциональный преобразователь, выполненный в виде ламельного коммутатора с двумя идентичными группами коллекторных ламелей с переменным шагом и переменной шириной ламелей, подвижная щетка которого соединена через магнитоэлект2 рический интегрирующий индикатор со средней точкой резистора, а первая и вторая группы коллекторных ламелей соединены соответственно с концами резистора, которые подключены к выходу усилителя Е2 ].Closest to the proposed is a device for measuring the average indicator pressure in the cylinder of a piston engine, containing a pressure sensor connected to the input of the amplifier, a resistor, a functional converter made in the form of a lamella switch with two identical groups of collector lamellas with a variable pitch and a variable width of lamellas, movable whose brush is connected through a magnetoelectric integrating indicator with the midpoint of the resistor, and the first and second groups of collector lamellas connected respectively to the ends of the resistor, which are connected to the output of the amplifier E2].

Это устройство однако не позволяет раздельно измерять среднее индикаторное давление на основной петле цикла поршневого двигателя и на насосной петле.This device, however, does not allow separate measurement of the average indicator pressure on the main loop of the piston engine cycle and on the pump loop.

Цель изобретения - расширение функциональных возможностей за счет раздельного измерения среднего индикаторного давления на основной петле цикла поршневого двигателя и насосной петле.The purpose of the invention is the expansion of functionality by separately measuring the average indicator pressure on the main loop of the piston engine cycle and the pump loop.

Поставленная цель достигается тем, что устройство снабжено дополнительным контактом на панели ламельного коммутатора, установленным между дву-⁴мя идентичными группами коллекторных ламелей, электронным ключом,триггером и переключателем режимов,причем дополнительный контакт через переклю3 932321 чатель режимов соединен со счетным входом триггера,выход которого соединен с входом электронного ключа,установленного в цепи магнитоэлектрического интегрирующего индикатора.The goal is achieved in that the device is provided with an auxiliary contact to the lamellar panel switch mounted between the ^two-four identical groups mja lamella collector, an electronic key, and the trigger switch modes, wherein the additional contact through pereklyu3 932,321 ents modes coupled to the counting input of the flip-flop, whose output connected to the input of an electronic key installed in the circuit of the magnetoelectric integrating indicator.

На чертеже изображена электрическая схема устройства.The drawing shows an electrical diagram of the device.

Устройство состоит из датчика 1 давления, установленного на цилиндре 2 двигателя, усилителя 3 с блоком 4 питания, функционального преобразователя 5» состоящего из двух групп коллекторных ламелей с различным шагом и шириной, неподвижного контакта 6, связанного управляющим триггером 7 с электронным коммутатором 8, включенным в цепь магнитоэлектричес-; кого показывающего прибора 9, резистора 10.The device consists of a pressure sensor 1 mounted on the cylinder 2 of the engine, an amplifier 3 with a power supply unit 4, a functional converter 5 ”consisting of two groups of collector slats with different pitch and width, a fixed contact 6 connected by a control trigger 7 with an electronic switch 8, included in a magnetoelectric circuit; indicating device 9, resistor 10.

Устройство работает следующим обра-го зом.The device operates as follows.

Сигнал датчика 1 давления, преобразованный электронным усилителем 3, поступает через функциональный преобразователь 5 и щетку 11 на магнито- 25 электрический прибор 9, определяющий среднее значение проходящего через него тока.The signal of the pressure sensor 1, converted by an electronic amplifier 3, enters through a functional converter 5 and a brush 11 to a magneto-25 electric device 9, which determines the average value of the current passing through it.

При разомкнутом выключателе 12 предлагаемое устройство работает ана- ₃₀логично известному. При включенном выключателе 12 в момент набегания щетки 11 на неподвижный контакт 6, триггер 7 включает электронный коммутатор 8 и ток через ‘магнитоэлектрический прибор 9 проходит в течение одного оборота щетки 11. В момент следующего набегания щетки 11 на контакт 6 с помощью управляющего триггера 7 происходит выключение коммутатора 8, в результате чего в течение следующего оборота ток через магнитоэлектрический прибор 9 не проходит.When the open switch 12, the device ₃₀ operates logically analogous known. When the switch 12 is turned on at the moment the brush 11 runs on the fixed contact 6, the trigger 7 turns on the electronic switch 8 and the current passes through the magnetoelectric device 9 for one revolution of the brush 11. At the next run of the brush 11 on the contact 6 using the control trigger 7, turning off the switch 8, as a result of which during the next revolution the current does not pass through the magnetoelectric device 9.

Использование предлагаемого изобретения позволяет непосредственно в _4Jпроцессе испытаний и наладки двигателя раздельно измерять среднее индикаторное давление основной петли сжатие-расширение и петли насосных потерь впуск-выпуск, повысить точность и надежность исследования рабочих процессов поршневых двигателей.Using the present invention allows directly in the _4J process of testing and commissioning the engine to separately measure the average indicator pressure of the main compression-expansion loop and the inlet-outlet pumping loss loop, to increase the accuracy and reliability of the study of piston engine working processes.

Claims

(5) DEVICE FOR MEASURING MEDIUM INDICATOR PRESSURE IN THE CENTER OF A PISTON ENGINE The invention relates to instrument engineering and can be used in the diagnosis of piston engines. A device for separate indication of the main loop of the compression-expansion cycle and pumping losses of a piston engine is known. A disadvantage of the known device is the presence of a collector switch, the speed of which the brush rotates is two times less than the speed of rotation of the engine crankshaft. Closest to the present invention is a device for measuring the average indicator pressure in a cylinder of a piston engine, comprising a pressure sensor associated with an amplifier input, a resistor, a functional converter made in the form of a lamella switch with two identical groups of collector lamella with variable pitch and variable width of lamellae , the movable brush of which is connected via a magnetoelectric integrating indicator with the midpoint of the resistor, and the first and second groups of collector lamellas d are respectively connected to the ends of the resistor, which are connected to the output of the amplifier G2. This device, however, does not allow separate measurement of the average indicator pressure on the main loop of the piston engine cycle and on the pump loop. The purpose of the invention is to expand the functionality by separately measuring the average indicator pressure on the main loop of the piston engine cycle and pump loop. The goal is achieved by the fact that the device is equipped with an additional contact on the lamellar switch panel installed between two identical groups of collector lamellae, an electronic key, a trigger and a mode switch, the additional contact being connected via a mode switch to the counting trigger input, the output of which is connected to the input of the electronic key installed in the circuit of the magnetoelectric integrating indicator. The drawing shows the electrical circuit of the device. The device consists of a pressure sensor 1 mounted on a cylinder 2 of an engine, an amplifier 3 with a power supply unit k, a functional converter 5 consisting of two groups of collector lamellae with different pitch and width, a fixed contact 6 connected by a control trigger 7 with electronic a switch 8 connected to a magnetoelectric indicating device 9 of a resistor 10. The device pa6oTaet as follows. The signal from pressure sensor 1, converted by electronic amplifier 3, is fed through functional converter 5 and brush 11 to a magnetoelectric device 9, which determines the average value of the current flowing through it. When the switch 12 is open, the proposed device works analogously to the known one. When the switch 12 is turned on, when the brush 11 comes on the fixed contact 6, the trigger 7 turns on the electronic switch 8 and the current through the magnetoelectric device 9 passes during one turn of the brush 11. At the next time the brush 11 comes on contact 6 the trigger 7 switches off the switch 8, as a result of which the current does not pass through the magnetoelectric device 9 during the next turn. The use of the present invention allows directly in the process of testing and adjusting the engine to separately measure the average indicator pressure of the main compression-expansion loop and pump inlet-release loss loops, to improve the accuracy and reliability of the investigation of the working processes of piston engines. Apparatus of the Invention A device for measuring the average indicator pressure in a cylinder of a piston engine, comprising a pressure sensor associated with an amplifier input, a resistor, a functional converter made in the form of a lamella switch with two identical groups of collector lamella with variable pitch and variable width of the lamella, movable brush of which connected through a magnetoelectric integrating indicator with the midpoint of the resistor, and the first and. The second group of collector lamellae are connected respectively to the ends of the resistor, which are connected to the output of the amplifier, differing in that, in order to expand the functionality by separately measuring the average indicator pressure on the main loop of the piston engine cycle and pumping loop, it is provided with an additional contact on the lamellar switch panel installed between two identical groups of collector lamellas, an electronic key, a trigger and a mode switch, with an additional contact through the mode switch is connected to the counting input of the trigger, the output of which is connected to the input of the electronic key installed in the magnetoelectric integrating indicator circuit. Sources of information taken into account in the examination 1. USSR author's certificate number 331268, cl. G 01 L 23/1, 1970.

2. USSR author's certificate №, cl. G 01 L C / S, 19b2 (prototype).