SU773471A1 - I.c. engine diagnosing method - Google Patents
I.c. engine diagnosing method Download PDFInfo
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- SU773471A1 SU773471A1 SU792725119A SU2725119A SU773471A1 SU 773471 A1 SU773471 A1 SU 773471A1 SU 792725119 A SU792725119 A SU 792725119A SU 2725119 A SU2725119 A SU 2725119A SU 773471 A1 SU773471 A1 SU 773471A1
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- USSR - Soviet Union
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- gas
- cylinder
- witness
- sample
- cylinders
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Description
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Изобретение относитс к испытани м и диагностике двигателей внутреннего сгорани (ДВС).The invention relates to the testing and diagnosis of internal combustion engines (ICE).
Известен способ диагностики двигателей внутреннего сгорани по величине утечки газов из надпоршневого пространства цилиндров , заключающийс в том, что при работе двигател поочередно в каждый цилиндр подают рабочее тело, отбирают пробу картерных газов, провод т газовый анализ пробы, а результаты анализа сравнивают с эталонными и по результатам сравнени суд т о состо нии цилиндров 1.A known method for diagnosing internal combustion engines by the magnitude of gas leaks from the piston cylinder space, which means that when the engine is running, working fluid is alternately supplied to each cylinder, crankcase samples are taken, gas samples are analyzed, and the results of the comparison judge the condition of the cylinders 1.
Этот способ дает возможность произвести лишь качественную оценку газоплотности отдельных цилиндров в услови х, значительно отличающихс от реальных условий работы поршневой машины, так как измерени производ тс при совершенно других теплофизических услови х в цилиндре машины.This method makes it possible to make only a qualitative assessment of the gas density of individual cylinders under conditions that are significantly different from the actual operating conditions of the piston machine, since the measurements are carried out under completely different thermal conditions in the cylinder of the machine.
Цель изобретени - повышение точности диагноза.The purpose of the invention is to improve the accuracy of diagnosis.
Указанна цель достигаетс тем, что дополнительно подают в каждый из цилиндровThis goal is achieved by additionally being supplied to each of the cylinders.
газ-свидетель и провод т газовый анализ па содержание газа-свидетел в пробе.gas witness and gas analysis of the witness gas in the sample.
Сущность способа заключаетс в следующем .The essence of the method is as follows.
Величина расхода картерных газов через исследуемый цилиндр зависит от суммарного зазора в сопр жени х деталей цилиндропорщневой группы и вл етс мерой газоплотности данного цилиндра.The magnitude of the flow rate of crankcase gases through the cylinder under study depends on the total gap in the interfaces of the parts of the cylinder group and is a measure of the gas density of the cylinder.
Расход картерных газов определ етс по фор.мулеCrankcase flow is determined by the formula
VKI ЙVKI TH
где VKI -расход картерных газов через зазоры исследуемого цилиндра; VK - общий расход картерных газовwhere VKI is the flow rate of crankcase gases through the gaps of the investigated cylinder; VK - the total consumption of crankcase gases
двигател ; г.1 -объемна дол газа-свидетел вengine; g.1 - the volume of gas witness in
картерных газах; Г1 - объемна дол газа-свидетел наcrankcase; G1 - the volume of gas witness to
впуске исследуемого цилиндра; Расход картерных газов VK за врем измерений можно считать посто нным. Объемна дол газа-свидетел на впуске каждого цилиндра TI поддерживаетс неизменной. Тогда дол расхода картерных газов от исследуемого цилиндра будет пр мо пропорциональна содержанию газа-свидетел в картерных газахthe inlet of the investigated cylinder; The flow rate of crankcase gases VK during the measurement time can be considered constant. The volumetric proportion of the witness gas at the inlet of each cylinder TI is kept constant. Then the flow rate of crankcase gases from the cylinder under study will be directly proportional to the content of the witness gas in crankcase gases.
VKO Агк1, где -р. - А const.VKO Agk1, where - p. - A const.
Сравнива расход картерных газов через отдельный цилиндр с критической величиной утечки при максимальных зазорах в детал х цилиндропоршневой группы, суд т о величине газоплотности данного цилиндра.Comparing the flow rate of crankcase gases through a separate cylinder with a critical leakage rate at maximum gaps in the parts of the cylinder-piston group, the value of gas density of this cylinder is judged.
Данный способ позвол ет производить оценку газоплотности каждого цилиндра поршневой машины при любом режиме ее работы в реальных услови х эксплуатации.This method makes it possible to estimate the gas density of each cylinder of a piston machine in any mode of its operation under actual operating conditions.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792725119A SU773471A1 (en) | 1979-02-14 | 1979-02-14 | I.c. engine diagnosing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792725119A SU773471A1 (en) | 1979-02-14 | 1979-02-14 | I.c. engine diagnosing method |
Publications (1)
Publication Number | Publication Date |
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SU773471A1 true SU773471A1 (en) | 1980-10-23 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU792725119A SU773471A1 (en) | 1979-02-14 | 1979-02-14 | I.c. engine diagnosing method |
Country Status (1)
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SU (1) | SU773471A1 (en) |
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1979
- 1979-02-14 SU SU792725119A patent/SU773471A1/en active
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