SU808682A1

SU808682A1 - Method of producing starting pulse for ignition system

Info

Publication number: SU808682A1
Application number: SU772555285A
Authority: SU
Inventors: Виктор Борисович Ан; Иван Дмитриевич Бухтияров; Алексей Степанович Демин; Виктор Васильевич Косырев
Original assignee: Специальное Опытное Проектно-Конст-Рукторско-Технологическое Бюросо Васхнил
Priority date: 1977-12-15
Filing date: 1977-12-15
Publication date: 1981-02-28

Description

Изобретение относится к импульсной технике и может быть использовано в двигателестроении.The invention relates to a pulse technique and can be used in engine building.

Известны способы получения пусковых импульсов для систеьи зажигания двигателей внутреннего сгорания. Один из известных способов включает изменение индуктивности колебательного контура как функции скорости вращения вала fl].Known methods for producing starting pulses for the ignition system of internal combustion engines. One of the known methods involves changing the inductance of the oscillating circuit as a function of shaft rotation speed fl].

Недостаток этой системы заключается в сложности и низкой надежности.The disadvantage of this system is its complexity and low reliability.

Наиболее близким техническим решением к предлагаемому является способ получения пусковых импульсов для системы зажигания двигателей внутреннего сгорания относительно определенного положения угла поворота коленчатого вала, например,верхней мертвой точки в процессе вращения, протекактего с изменяющейся скоростью, при котором получают серии импульсов угловых положений коленчатого вала - базовую N_bct3h пусковую N пусю в каждой из серий которых содержится одинаковое количество импульсов угловых положений коленчатого вала, при этом за определенный интервал времени S с момента начала ба10 зовой серии отсчитывают и накапливают импульсы по исходной серии Nga_3ja с момента начала пусковой серии отсчитывают и накапливают импульсы последующей серии Ы*_Пу_СК до тех пор, пока сумма импульсов исходной и последующей серии ие достигнет наперед заданной величины N [2J.The closest technical solution to the proposed one is a method of producing starting pulses for the ignition system of internal combustion engines with respect to a certain position of the angle of rotation of the crankshaft, for example, top dead center during rotation, which occurs at a variable speed, at which a series of pulses of the angular positions of the crankshaft are obtained - the basic N _bct3 h launcher N Puschu in each of the series of which contains the same number of pulses of the angular positions of the crankshaft, while the selected time interval S from the start of the base series 10 counts and accumulates pulses from the initial series Nga _3j a from the start of the start series counts and accumulates the pulses from the subsequent series S * _P at the _SC until the sum of the pulses of the initial and subsequent series reaches given value of N [2J.

Однако данный способ обладает невысокой точностью получения пусковых импульсов.However, this method has a low accuracy of starting pulses.

Цель изобретения - повышение точности получения пусковых импульсов.The purpose of the invention is to increase the accuracy of starting pulses.

Указанная цель достигается тем, что в способе получения пусковых импульсов для системы зажигания двигателей внутреннего сгорания относительно определенного положения угла поворота коленчатого вала, например, верхней мертвой точки в процессе вращения, протекающего с изменяющейся скоростью, при котором получают серии импульсов угловых положений коленчатого вала - базовую Νς_α3 и пусковую N_Пу_СК в каждой из серий которых содержится одинаковое количество импульсов угловых положений коленчатого вала, при этом за определенный интервал времени S с момента начала базовой серии отсчитывают и на капливают импульсы по исходной серии Ng_a3,a с момента начала пусковой серии отсчитывают и накапливают импульсы последующей серии N пуск до тех пор, пока сумма импульсов исходной и последующей серии не достигнет наперед заданной величины N,измеряют и запоминают интервал времени дt,соответствующий части периода или целому периоду от конца некоторого интервала S' , который может принимать s ^ιυ одно из значений —, причем η изменяп ется от единицы до величины, соответствующей базовой серии импульсов, одновременно указанный некоторый интервал времени S и η раз сдвигают- по углу поворота коленчатого вала к моменту начала пусковой серии, определяют и накапливают значения произведений Νθ_α3. П, при ЭТОМ Ng_a3-3TO число импульсов угловых положений коленчатого вала за интервал времени S и At·η и значение дт*разности двух интервалов времени, в течение каждого из которых’ коленчатый вал совершает поворот на один и тот же угловой интервал_;при этом от величины и знака разности ДТ¹ производят суммирования Νβ_σ3 . η с произведением М-η, а At-п с произведением Τ_ΜΔ1ί·π, причем М есть число целых периодов импульсов угловых положений коленчатого вала, а Тц,дт’“ интервал времени, зависящий от величины и знака разности дТ, а в момент, когда сумма (Ν'_εα3 · η) + + (Μ·η + №_п^_ск ) достигнет Наперед заданной величины N, отсчитывают интервал времени, равный сумме At'η и ^по окончании которого выдается пусковой импульс.This goal is achieved by the fact that in the method of starting pulses for the ignition system of internal combustion engines with respect to a certain position of the crankshaft rotation angle, for example, top dead center during rotation that proceeds at a varying speed, at which a series of pulses of the angular positions of the crankshaft are obtained - the base Νς _α3 and starting N _P at _SC in each series of which contains the same number of pulses of the angular positions of the crankshaft, while for a certain time interval change S from the moment the base series begins, count and accumulate the pulses from the initial series Ng _a3 , and from the start of the start series, the pulses of the next series N start are counted and accumulate until the sum of the pulses of the initial and subsequent series reaches the predetermined value N, measuring and storing the time interval dt, the period corresponding to a portion or the entire period from the end of an interval S ', which may take one of s ^ιυ values -, wherein η izmenyap etsya from unity to a value corresponding base series cpm lsov while said certain interval of time S and η times sdvigayut- of crank angle starting at the beginning of the series, and determine the values of the products accumulate Νθ _α3. P, with THIS Ng _a3 -3TO, the number of pulses of the angular positions of the crankshaft for the time interval S and At · η and the value dt * of the difference of two time intervals, during each of which the crankshaft rotates by the same angular interval _; in this case, the summation Νβ _{σ3 is} made from the magnitude and sign of the difference of DT ¹ . η with the product M-η, and At-n with the product Τ _{ΜΔ1 ί} · π, where M is the number of integer periods of pulses of the angular positions of the crankshaft, and Tc, dt is the time interval depending on the magnitude and sign of the difference dT, and in the moment when the sum (Ν ' _εα3 · η) + + (Μ · η + No. _p ^ _ck ) reaches the set value N in advance, the time interval equal to the sum At'η is counted and ^{at the} end of which a trigger pulse is issued.

На фиг. 1 представлена структурная электрическая схема устройства для реализации предлагаемого способа;на фиг. 2 - временные диаграММЫ · оIn FIG. 1 shows a structural electrical diagram of a device for implementing the proposed method; FIG. 2 - temporary diagrams

Устройство содержит датчик 1, формирователь 2, блок 3 управления, датчик 4 начальной установки, генератор 5, блок 6 накопления и считывания, блок 7 управления разности, вых oh 8 устройства.The device comprises a sensor 1, a driver 2, a control unit 3, an initial installation sensor 4, a generator 5, an accumulation and reading unit 6, a difference control unit 7, output oh 8 of the device.

Способ получения пусковых импульсов, для системы зажигания осуществляется следующим образом.The method of obtaining starting pulses for the ignition system is as follows.

Датчик 1 выдает импульсы, частота скорости дви2, в котором по амплитуде (фиг.2,а).Sensor 1 gives out pulses, the frequency of the speed dv2, in which the amplitude (Fig.2, a).

которых пропорциональна жения, на формирователь формируются стандартные и длительности импульсыwhich are proportional to life, standard and duration pulses are formed on the shaper

При достижении начала базовой серии определяемой датчиком 4 начальной установки, блок 3 управления по импульсам генератора 5 выдает разрешающий потенциал на время, равное длительности S^f =S, на третий вход блока 6 накопления и считывания. При этом импульсы NgQj (фиг.2,г) с выхода формирователя 2 в течение интерва- 55 ла времени S’=S накапливаются в первом накопителе блока 6. С момента окончания интервала S' =S до момента начала ближайшего импульса, соответствующего интервалу Δΐ (фиг.2,г), блок 3 управления выдает разрешение на прохождение импульсов генератора 5 в блок 6, на его второй накопитель. Когда фаза процесса движения достигнет начала пусковой серии l^Nnycx (фиг.2а), управляемые сигналом блока 3 управления импульсы N'nycw (фиг.2,г) поступают на первый накопитель блока 6, где производится суммирование импульсов Ν'_6α3 с Νη(._σΚ(фиг.2,г). При этом в момент достижения суммы Neco ^{+ м}пуск наперед заданной величины N блок 6 жакопления и считывания выдает сигнал на блок 3 управления, который ставит на режим считывания содержимого второго накопителя блока 6. В момент, когда содержимое второго накопителя сосчитывается до нуля, выдается пусковой импульс. Если частота генератора 5 была неизменна как в режиме накопления, так и в режиме считывания, то время считывания и время накопления должны быть одинаковыми.Upon reaching the beginning of the base series determined by the sensor 4 of the initial installation, the control unit 3 by the pulses of the generator 5 gives a resolving potential for a time equal to the duration S ^f = S to the third input of the storage and reading unit 6. At the same time, the pulses NgQj (Fig. (figure 2, g), the control unit 3 issues a permit for the passage of pulses of the generator 5 to block 6, to its second drive. When the phase of the movement process reaches the start of the starting series l ^N nycx (Fig. 2a), the pulses N'nycw (Fig ^. 2d), controlled by the signal of the control unit 3, are supplied to the first drive of the unit 6, where the pulses Ν ' _{6α3 are summed} with Νη ( _σΚ (Fig. 2, d) _{.At the} same time, when the sum of Neco ^{+ m is} reached, the start-up of the predetermined value N, the accumulation and readout unit 6 gives a signal to the control unit 3, which sets the contents of the second drive of unit 6. to read out. when the contents of the second drive are counted to zero, a trigger pulse is issued c. If the frequency of the oscillator 5 was unchanged both in the accumulation mode and in read mode, the reading time and the accumulation time must be equal.

Таким образом, с момента N* (фиг.2,г), при котором выдают пусковой импульс, проходит время, равное At.Thus, from the moment N * (FIG. 2, d), at which a starting pulse is issued, a time equal to At passes.

Следовательно, с точностью до остатков периодов можно выдавать пусковой импульс.Therefore, up to period residues, a trigger pulse can be issued.

Работа устройства в случае,когда S = (фиг.2,в), происходит аналогич- ным образом с той лишь разницей, чтоThe operation of the device in the case when S = (FIG. 2, c) occurs in a similar way with the only difference that

S начало фазы S = сдвигают ближе к пусковой серии в два раза, а при накапливании вместо каждого импульса Ngccj выдают по.два импульса, т.е. величину Ng_Q3 умножают на два.S the beginning of the phase S = is shifted two times closer to the starting series, and during the accumulation, instead of each pulse, Ngccj give out two pulses, i.e. Ng _{Q3 is} multiplied by two.

В момент, когда сумма Ng_a3 '2 + + N пуск достигает вели'&ны (фиг.2,д), причем Ν'_Π40Κ< = N'_n(JCK , содержимое второго накопителя блока накопления и считывания считывается с частотой в два раза медленнее, чем во время накопления за интервал ftt.At the moment when the sum Ng _a3 '2 + + N, the start-up reaches _вели & _ны (Fig. 2, e), and Ν' _{Π40Κ <} = _N'n _(JCK , the contents of the second drive of the storage and reading unit are read with a frequency of two times slower than during accumulation for the ftt interval.

Таким образом, автоматически интервал времени с момента равенства суммы величин до выдачи пускового момента nJ (фиг.2,д) удваивается и получается равным 2д1.Thus, automatically the time interval from the moment of equality of the sum of the quantities to the issuance of the starting moment nJ (Fig.2, e) doubles and turns out to be 2d1.

В режиме переходных процессов,при которых наблюдается значительная неравномерность работы от периода к периоду, в блоке 7 определения разности определяют разность Т^-Т₂как результат разности двух импульсных последовательностей, которая с некоторым коэффициентом вводится как поправка к интервалу времени считывания, причем в зависимости от величины разности к остатку периода добавляют один или несколько целых периодов к интервалу накопления.In the transient mode, in which there is significant non-uniformity of operation from period to period, in the difference determination unit 7, the difference T ^ -T ₂ is determined as the result of the difference of two pulse sequences, which is introduced with a certain coefficient as a correction to the reading time interval, and depending on from the difference to the remainder of the period, add one or more whole periods to the accumulation interval.

Таким образом, скорректировав, можно точно выдать пусковой импульс с учетом неравномерности процесса движения.Thus, having corrected, it is possible to accurately give a starting impulse taking into account the unevenness of the movement process.

Claims

The invention relates to a pulse technique and can be used in engine-building. Methods are known for producing starting pulses for combustion engines for internal combustion engines. One of the known methods involves changing the inductance of the oscillating circuit as a function of the speed of rotation of the shaft 1. The disadvantage of this system is complexity and low reliability. The closest technical solution to the present invention is a method for obtaining starting pulses for cucTeNBJ ignition of internal combustion engines with respect to a certain position of the angle of rotation of the crankshaft of the shaft, for example, the top dead center during rotation, varying with the variable 5 | by the speed at which a series of pulses of angular positions of the crankshaft of the shaft are received — the basic MBSTZ starting each of the series of which contains the same number of pulses of the angular positions of the crankshaft, while for a certain time interval S from the moment of the beginning of the main series the pulses are counted and accumulated THE ENTRY CONNECTION Ngaa, the moment the start of the start-up series counts down the impulses of the next series N |, (. Until the sukola pulses of the original and subsequent series do not reach in advance the size of 2D. However, this method has a low accuracy of starting pulses. The purpose of the invention is to increase the accuracy of the starting pulses. This goal is achieved by the fact that the method of obtaining starting pulses for the ignition engine of the internal combustion engine with respect to a certain position of the angle of rotation of the crankshaft, for example, top dead center. in the process of rotation, proceeding at a varying speed, at which a series of pulses of angular positions of the crankshaft are obtained — the base and the starting N fs to ° each of the series of which contains the same number of pulses of angular positions of the crankshaft, while for a certain time interval S from the beginning of the base series the pulses are counted and accumulated along the original Ngo series, and since the start of the starting series the pulses are counted and accumulated NnycK BEFORE the sum of the pulses of the initial and subsequent series reaches the predetermined value N, is measured and remembered the time interval ut corresponding to a part of the period or the whole period from the end of some the first S, which can take one of the values -, with n changing from one to the value corresponding to the base series of pulses, a specified time interval S and n times shifting simultaneously - by the angle of rotation of the crankshaft by the start of the starting series, they accumulate the values of the Ngo, products. n, with Ngo, 3-3TO the number of pulses of the angular positions of the knee shaft during the time interval S and D1 n and the value of the difference of two time intervals, during each of which the crankshaft rotates by the same angular interval. on the magnitude and sign of the difference τT, sum Ngo,., j. n with the product Mn, and jjt.n with the product T / d-ff-n, moreover, M is the number of integer pulses of angular positions of the crankshaft, and Tdd (t is the time interval depending on the magnitude and sign of the difference LT , and at the moment when the sum (Ngag) + + (Mn + NnijcK) reaches the predetermined value N, a time interval equal to the sum of Atp and M4LT ° is counted, the starting pulse being outputted in. Fig. 1 shows the structural electrical circuit of the device for implementing the proposed method; Fig. 2 - timing diagrams. The device contains sensors 1, the former 2, the control unit 3, the initial installation sensor 4, the generator 5, the accumulation unit 6 and; the readout, the difference control unit 7, the device output 8. The method for obtaining the starting pulses for the ignition system proceeds as follows. (Sensor 1 produces pulses, the frequency of which is proportional to the speed of movement, to shaper 2, in which pulses standard in amplitude and duration are formed (Fig. 2, a) .. When the beginning of the base Ngq series detected by sensor 4 of the initial installation is reached, block 3 pulse control The am generator 5 delivers a permissive potential for a time equal to the duration to the third input of the accumulation and reading unit b. At the same time, the Mroz pulses (Fig. 2, d) from the output of the driver 2 are accumulated in the first accumulator of block 6 during the time interval, from the moment S 5 ends until the beginning of the closest pulse corresponding to the interval At (Fig. 2, d) The control unit 3 grants permission for the passage of the pulses of the generator 5 to the block 6, to its second drive. When the phase of the movement reaches the start of the Iptssk start-up series (Fig. 2a), the Nnyck pulses controlled by the signal of the control unit 3 (Fig. 2, d) go to the first accumulator of the block 6, where the impulses Ngo are produced, s, (Fig. 2, d). At the same time, at the moment of reaching the sum mbaz + ptssk before the predetermined value N, the accumulation and reading unit 6 outputs a signal to the control unit 3, which sets the readout mode of the second accumulator of the unit 6. At the moment when the content of the second accumulator counts to zero, starting impulse. If the frequency of oscillator 5 was unchanged in both the accumulation mode and the read mode, then the read time and accumulation time should be the same. Thus, since N (Fig. 2, d), at which the starting impulse is issued, the time is equal to D1. Consequently, with an accuracy of the residual periods, a starting impulse can be given. The operation of the device in the case when 5 (Fig. 2, c) occurs in a similar way with the only difference that the beginning of the S -j phase is shifted closer to the starting series by two times, and when accumulating Ngc instead of each pulse, two pulse, i.e. value multiplied by two. At the moment when the sum Ng -2 NnijcK reaches N (Fig. 2, d), Nj, p loading the contents of the second accumulator of the accumulation block 6 and reading is read at a rate two times slower than during the accumulation during the ut interval. Thus, automatically the time interval from the moment of the equality of the sum of the values to the start of the starting moment Nj (Fig. 2, d) doubles and becomes equal to 2d1. In the transient mode, in which there is a significant non-uniformity of operation from period to period, in block 7 for determining the difference, the difference is determined as a result of the difference of two pulse sequences, which with a certain coefficient is introduced as an amendment to the reading time interval the remainder of the period is added one or more integer periods to the accumulation interval. Thus, by correcting, it is possible to issue a starting impulse taking into account the non-uniformity of the movement process, the invention The method of obtaining starting pulses for the ignition systems of internal combustion engines relative to a certain position of the crankshaft rotation angle, for example, the upper dead center variable speed at which a series of pulses of angular positions of the crankshaft is received — the basic starting Nnucn B of each series which contains the same number of them crankshaft angular position pulses, while for a certain time interval S since the start of the base series, pulses are counted and accumulated on the original NgQ series, and since the start of the starting series, the next NRUJ-K series pulses are accumulated pulses of the initial and subsequent series will not reach in advance the specified value N, which is different from the fact that, in order to improve the accuracy of obtaining the starting pulses, the time interval d1 corresponding to the part of the period or the whole period from ontsa certain interval S, which may take one of the values S -. moreover, n varies from one to the value corresponding to the base series of pulses, at the same time a certain time interval S is shifted n times by the angle of rotation of the crankshaft by the time of the start of the starting series, the values of products N / and Ngo are determined and accumulated impulses of crankshaft angular positions for a time interval s, and itH and the Difference value of two time intervals, during each of which the crankshaft makes a turn to the same angular interval, in this case from the magnitude and difference of the difference DT summing up Nga.n with the product Ip, and ut-n with the product TmdT and M is the number of integer periods of pulses of the angular positions of the crankshaft, σ, time interval, depending on the magnitude and sign of the difference DT, and at the time when the sum ( Ngo, p) + (Mn + NnijtK) will reach in advance the given value N, counting the time interval equal to the sum of tn and Tff °, the end of which produces a starting impulse. Sources of information taken into account in the examination 1. Germany Patent O 1253317, cl. 46 to 3/00, published. 03.12.70.

2. The patent of Germany 1917389, 46 to 3/00, published. 05/27/71 (prototype).