RU94037900A - Method determining technical state of internal combustion engine and expert system for its implementation - Google Patents

Method determining technical state of internal combustion engine and expert system for its implementation

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Publication number
RU94037900A
RU94037900A RU94037900/06A RU94037900A RU94037900A RU 94037900 A RU94037900 A RU 94037900A RU 94037900/06 A RU94037900/06 A RU 94037900/06A RU 94037900 A RU94037900 A RU 94037900A RU 94037900 A RU94037900 A RU 94037900A
Authority
RU
Russia
Prior art keywords
unit
acceleration
cylinder
cylinders
digital
Prior art date
Application number
RU94037900/06A
Other languages
Russian (ru)
Other versions
RU2078324C1 (en
Inventor
И.П. Добролюбов
О.Ф. Савченко
В.В. Альт
Original Assignee
Сибирский физико-технический институт аграрных проблем СО РАСХН
Сибирский институт механизации и электрификации СО РАСХН
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Application filed by Сибирский физико-технический институт аграрных проблем СО РАСХН, Сибирский институт механизации и электрификации СО РАСХН filed Critical Сибирский физико-технический институт аграрных проблем СО РАСХН
Priority to RU94037900A priority Critical patent/RU2078324C1/en
Publication of RU94037900A publication Critical patent/RU94037900A/en
Application granted granted Critical
Publication of RU2078324C1 publication Critical patent/RU2078324C1/en

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  • Combined Controls Of Internal Combustion Engines (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

FIELD: measurement technology. SUBSTANCE: method specifically refers to determination of technical state of piston engines by pressure in cylinders under operational conditions. For simplification of design and decrease of labour input for examination of technical state of engines under operational conditions indirect determination of indication diagrams of cylinders is conducted which does not require installation of special high temperature also thanks to more accurate identification of data and classification of state. Method is based on uninterrupted measurement of angular accelerations of crankshaft in phase of present values, on generation of functions of inertial component of acceleration also coupling active forces in cylinder with torque, on isolation of acceleration component representing working processes in cylinder, on computation of indirect indication diagram of cylinder, on its comparison with standard inherent to serviceable normal engine and with dependence of change of this diagram with change of state of engine and on classification of states by degree of their relationship. Expert system includes system includes registering and processing indication diagrams incorporating pressure transducers in cylinders, amplifiers with correction of zero line, analog-to-digital converter, pickup angular marks with recorder of revolutions, control unit, threshold flip-flop, manual control unit, receiver, computer, digital indicator, output unit, clock pulse generator, clock distributor, master unit of processing algorithms, former of processing commands, commutator, computer and circuit of formation of correction pulses. Expert system is supplemented with pickup of angular marks of teeth, former of pulses of teeth, OR gate, pickup of fuel injection, injection amplifier, second threshold flip-flop, double digital differentiator, digital sign discriminator, meter of acceleration extreme, arithmetic device, function generator, identification unit, master unit of models of processes, unit classifying states, master unit of functions of change of parameters. EFFECT: simplification of design, decreased labour input.

Claims (1)

Изобретение относится к измерительной технике, в частности к определению технического состояния поршневых двигателей по давлению в цилиндрах в эксплуатационных условиях. С целью упрощения и снижения трудоемкости экспертизы технического состояния двигателей в эксплуатационных условиях осуществляется косвенное определение индикаторных диаграмм цилиндров, не требующее установки специальных высокотемпературных датчиков и специальной головки блока цилиндров, а также повышается достоверность экспертизы за счет более точной идентификации данных и классификации состояний. Способ основан на непрерывном измерении в фазе текущих значений угловых ускорений коленчатого вала, генерировании функций инерционной составляющей ускорения, а также связывающей активные силы в цилиндре с крутящим моментом, выделении составляющей ускорения, отражающей рабочие процессы в цилиндре, вычислении косвенной индикаторной диаграммы цилиндра, сравнении ее с эталонном, присущим исправному нормальному двигателю, а также с зависимостью изменения этой диаграммы при изменении состояния двигателя и классификации его состояний по степени их близости. Экспертная сиотема включает систему для регистрации и обработки индикаторных диаграмм, содержащую датчики давления в цилиндрах, усилители с коррекцией нулевой линии, аналого-цифровые преобразователи, датчик угловых меток с отметчиком оборотов, блок управления, пороговый триггер, блок ручного управления, приемник, электронно-вычислительную машину, цифровой индикатор, блок вывода, генератор тактовых импулъсов, распределитель тактов, задатчик алгоритмов обработки, формирователь команд обработки, коммутатор, вычислительный блок и схему формирования импульсов коррекции, а также дополнительно введенные датчик угловых меток-зубьев, формирователь импульсов зубьев, элемент ИЛИ, датчик впрыска топлива, усилитель впрыска, второй пороговый триггер, двойной цифровой дифференциатор, цифровой дискриминатор знака, измеритель экстремума ускорений, запоминающее устройство ускорений, арифметическое устройство, генератор функций, блок идентификации, задатчик моделей процессов, блок классификации состояний, задатчик функций изменения параметров.The invention relates to measuring equipment, in particular to determining the technical condition of piston engines by pressure in the cylinders in operating conditions. In order to simplify and reduce the complexity of the examination of the technical condition of engines under operating conditions, the indicator diagrams of the cylinders are indirectly determined, which does not require the installation of special high-temperature sensors and a special cylinder head, and the reliability of the examination is increased due to more accurate data identification and state classification. The method is based on the continuous measurement of the current values of the angular accelerations of the crankshaft in the phase, generating the functions of the inertial component of the acceleration, as well as relating the active forces in the cylinder to the torque, isolating the acceleration component that reflects the working processes in the cylinder, calculating the indirect indicator diagram of the cylinder, comparing it with a reference inherent to a working normal engine, as well as with the dependence of the change in this diagram when the state of the engine changes and its states are classified by Degree of their proximity. The expert system includes a system for recording and processing indicator charts containing pressure sensors in the cylinders, amplifiers with zero line correction, analog-to-digital converters, an angle mark sensor with a speed indicator, control unit, threshold trigger, manual control unit, receiver, electronic computer machine, digital indicator, output unit, clock pulse generator, clock distributor, processor of the processing algorithms, shaper of processing commands, switch, computing unit and circuit correction pulse shaping, as well as additionally introduced tooth angle mark sensor, tooth pulse shaper, OR element, fuel injection sensor, injection amplifier, second threshold trigger, double digital differentiator, digital sign discriminator, acceleration extremum meter, acceleration memory, arithmetic device , function generator, identification unit, process model controller, state classification unit, parameter change function controller.
RU94037900A 1994-09-22 1994-09-22 Method and expert system for checking condition of internal combustion engines RU2078324C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU94037900A RU2078324C1 (en) 1994-09-22 1994-09-22 Method and expert system for checking condition of internal combustion engines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU94037900A RU2078324C1 (en) 1994-09-22 1994-09-22 Method and expert system for checking condition of internal combustion engines

Publications (2)

Publication Number Publication Date
RU94037900A true RU94037900A (en) 1996-08-20
RU2078324C1 RU2078324C1 (en) 1997-04-27

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Application Number Title Priority Date Filing Date
RU94037900A RU2078324C1 (en) 1994-09-22 1994-09-22 Method and expert system for checking condition of internal combustion engines

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RU (1) RU2078324C1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2451276C1 (en) * 2011-02-22 2012-05-20 Федеральное государственное образовательное учреждение высшего профессионального образования "Мурманский государственный технический университет" (ФГОУВПО "МГТУ") Method of diagnosing internal combustion engine
RU2532825C2 (en) * 2013-03-01 2014-11-10 Михаил Григорьевич Рыбаков Diagnostics method of piston packing of internal combustion engine as per indicator diagram
RU2583176C1 (en) * 2015-03-18 2016-05-10 Михаил Григорьевич Рыбаков Method of diagnosing piston packing of internal combustion engine at indicator diagram
RU2674817C1 (en) * 2017-07-18 2018-12-13 Открытое акционерное общество холдинговая компания "Коломенский завод" Revolution marker of crankshaft of internal combustion engine of ships

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Publication number Publication date
RU2078324C1 (en) 1997-04-27

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