PL82266B2 - - Google Patents

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Publication number
PL82266B2
PL82266B2 PL16806074A PL16806074A PL82266B2 PL 82266 B2 PL82266 B2 PL 82266B2 PL 16806074 A PL16806074 A PL 16806074A PL 16806074 A PL16806074 A PL 16806074A PL 82266 B2 PL82266 B2 PL 82266B2
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PL
Poland
Prior art keywords
function
shaft
rate
angular speed
pressure
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Application number
PL16806074A
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Polish (pl)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Priority to PL16806074A priority Critical patent/PL82266B2/pl
Publication of PL82266B2 publication Critical patent/PL82266B2/pl

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  • Measuring Fluid Pressure (AREA)

Description

Pierwszenstwo: Zgloszenie ogloszono: 01.02.1975 Opis patentowy opublikowano: 31.12.1975 822SS U KI- 42k,j4/04 I i i MKP' G01I 19/08 :. '/ . ¦ J.'mT Twórcywynalazku: Jerzy Czerwinski, Józef Fórmaniak, Andrzej Radon Uprawniony z patentu tymczasowego: Instytut Lotnictwa, Warszawa (Polska) Indykator predkosci narastania cisnienia Przedmiotem wynalazku jest indykator predkosci narastania cisnienia w funkcji kata obrotu walu korbowego silnika spalinowego.Dotychczas wartosc predkosci narastania cisnienia w funkcji kata obrotu walu jest wyznaczona rachunko¬ wo, droga posrednia, poprzez podzielenie wartosci pochodnej cisnienia przez predkosc katowa, dla ustalonych obrotów walu silnika. Tak wyznaczona predkosc narastania cisnienia w funkcji kata obrotu walu silnika obarczona jest znacznym bledem wynikajacym zfluktacji predkosci katowej walu zwlaszcza w sasiedztwie zwrotnych polozen tloka. Ponadto niemozliwe jest przeprowadzenie w tym wypadku pomiaru dla warunków nieustalonych, gdy wchodzi w rachube gwaltowna zmiana predkosci obrotowej silnika.Znane sa równiez indykatory stanowiace rozbudowane uklady, w których wartosc predkosci narastania cisnienia w funkcji kata obrotu walu uzyskiwana jest na drodze skomplikowanej obróbki sygnalów proporcjonal¬ nych do pochodnej cisnienia i predkosci katowej walu. Zlozonosc ukladów jak równiez klasa zastosowanych czlonów jest przyczyna ich niskiej dokladnosci.W przyrzadzie wedlug wynalazku predkosc narastania cisnienia w funkcji predkosci katowej walu jest uzyskiwana poprzez bezposrednie mnozenie proporcjonalne w ukladzie mnozacym. Do wejsc ukladu mnozacego jest podlaczony wzmacniacz rózniczkujacy oraz indykator z nadajnikiem predkosci katowej.Przedmiot wynalazku jest przedstawiony na rysunku w ukladzie blokowym w przykladzie jego wykonania.Indykator predkosci narastania cisnienia w funkcji kata obrotu walu sklada sie z ukladu mnozacego 4, do którego wejsc, w sposób równolegly, podlaczony jest wzmacniacz rózniczkujacy 1 oraz szeregowo polaczone nadajnik predkosci katowej 2 z integratorem 3.W uelu dokonania pomiaru nalezy do wzmacniacza rózniczkujacego 1 doprowadzic sygnal napieciowy, proporcjonalny do cisnienia wystepujacego w cylindrze, a nadajnik predkosci katowej 2 polaczyc mechanicznie zwalem korbowym badanego silnika. Zostaje on przetworzony na sygnal proporcjonalny do predkosci narastania cisnienia w funkcji czasu, po czym podawany jest na wejscie A ukladu mnozacego 4. Sprzezony zwalem badanego silnika nadajnik predkosci katowej 2 jest zródlem sygnalu proporcjonalnego do predkosci katowej. Sygnal ten jest doprowadzony do integratora 3, gdzie zostaje przetworzony na wartosc odwrotnie2 82 266 proporcjonalna do predkosci katowej walu badanego silnika. Tak przetworzony sygnal podawany jest na wejscie B ukladu mnozacego 4, który mnozy uzyskujemy sygnal proporcjonalny do predkosci narastania cisnienia w funkcji kata obrotu go przez sygnal pochodzacy ze wzmacniacza rózniczkujacego 1. Na wyjsciu indykatora, uzyskujemy sygnal proporcjonalny do predkosci narastania cisnienia w funkcji kata obrotu walu korbowego badanego silnika. PL PLPriority: Application announced: 01/02/1975 Patent description was published: 31/12/1975 822SS U KI- 42k, j4 / 04 I i i MKP 'G01I 19/08:. '/. ¦ J.'mT Creatorswynalazku: Jerzy Czerwinski, Józef Fórmaniak, Andrzej Radon Authorized by the provisional patent: Institute of Aviation, Warsaw (Poland) Pressure growth rate indicator The subject of the invention is an indicator of the rate of pressure increase as a function of the rotation angle of the crankshaft of an internal combustion engine. of the pressure build-up as a function of the shaft rotation angle, the indirect path is calculated by dividing the value of the pressure derivative by the angular velocity for the specified revolutions of the engine shaft. The speed of pressure increase determined in this way as a function of the rotation angle of the engine shaft is burdened with a significant error resulting from fluctuation of the shaft angular speed, especially in the vicinity of the reverse piston positions. Moreover, it is impossible to carry out in this case the measurement for transient conditions, when a sharp change in the engine rotational speed comes into consideration. There are also indicators which are complex systems in which the value of the speed of pressure increase as a function of the shaft rotation angle is obtained by means of complicated processing of proportional signals to the derivative of pressure and shaft speed. The complexity of the systems as well as the class of the components used is the reason for their low accuracy. In the device according to the invention, the rate of pressure increase as a function of the angular speed of the shaft is obtained by direct proportional multiplication in the multiplier. A differential amplifier and an indicator with an angular speed transmitter are connected to the inputs of the multiplier. The subject of the invention is presented in a block diagram in an example of its implementation. The indicator of the pressure rise rate as a function of the angle of rotation of the shaft consists of a multiplier 4, which can be entered in In parallel way, the differential amplifier 1 is connected and the angular speed transmitter 2 is connected in series with the integrator 3. In the measurement unit, the differential amplifier 1 should be fed with a voltage signal proportional to the pressure in the cylinder, and the angular speed transmitter 2 connected mechanically with the crankshaft of the tested engine . It is converted into a signal proportional to the rate of pressure increase as a function of time, and then it is fed to the A input of the multiplier 4. The angular speed transmitter 2 connected to the tested engine is the source of the signal proportional to the angular velocity. This signal is fed to the integrator 3, where it is converted into a value inversely proportional to the angular speed of the tested engine shaft. The signal processed in this way is fed to the B input of the multiplier 4, which multiplies the signal proportional to the rate of pressure increase as a function of the rotation angle by the signal coming from the differential amplifier 1. At the indicator output, we obtain a signal proportional to the speed of pressure increase as a function of the shaft rotation angle crankshaft of the tested engine. PL PL

Claims (1)

1. Zastrzezenie patentowe Indykator predkosci narastania cisnienia w funkcji predkosci katowej walu, znamienny tym, ze jest wyposazony w uklad mnozacy (4) sluzacy do uzyskiwania poprzez bezposrednie mnozenie proporcjonalno wartosci predkosci narastania cisnienia, do którego wejsc podlaczono wzmacniacz rózniczkujacy (1) oraz integrator (3) z nadajnikiem predkosci katowej (2). Prac. Poligraf. UP PRL Zam. 3600/75 naKlad 120+18 Cena 10 zl PL PL1. Patent claim Indicator of the rate of pressure growth as a function of the angular speed of the shaft, characterized by the fact that it is equipped with a multiplier (4) for obtaining by direct proportional multiplication the value of the rate of pressure rise, to which the differential amplifier (1) and the integrator (1) are connected 3) with an angular speed transmitter (2). Wash. Typographer. UP PRL Zam. 3600/75 for 120 + 18 Price PLN 10 PL PL
PL16806074A 1974-01-12 1974-01-12 PL82266B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16806074A PL82266B2 (en) 1974-01-12 1974-01-12

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL16806074A PL82266B2 (en) 1974-01-12 1974-01-12

Publications (1)

Publication Number Publication Date
PL82266B2 true PL82266B2 (en) 1975-10-31

Family

ID=19965675

Family Applications (1)

Application Number Title Priority Date Filing Date
PL16806074A PL82266B2 (en) 1974-01-12 1974-01-12

Country Status (1)

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PL (1) PL82266B2 (en)

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