SU715818A1 - Method of determining triggering pulse generation time - Google Patents

Description

(54) METHOD FOR DETERMINING THE MOMENT OF FORMATION OF THE START PULSE

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The invention relates to a pulse technique and can be used to regulate the moment of spark formation in internal combustion engines. . ,,

Methods are known for determining the moment of formation of a ttus pulse.

In one of the known methods, phase advance is obtained by adjusting the delay time as a non-linear function of the angular velocity of the engine. Only this method gives significant errors in determining the moment of formation of the impulse P.

The closest technical solution to the present invention is a method for determining the instant of formation of the starting or pulse that is separated from a certain phase of the working cycle for a specified time, consisting in forming in the first time interval limited by the phase angle of the working cycle, and proportional to the duration of the working cycle, and depending on the formation of the duration of the second time interval, the beginning of which coincides with the initial phase of the work cycle, and

the end determines the starting form; impulse 12.

The disadvantage of this, the spoyoba, is the presence of a complex process of determining the moment of formation of the starting pulse.

The purpose of the invention is to simplify the process of determining the moment of formation of the starting pulse. ; ./ ;;:;:;; .

Claims (2)

For this, in the method of determining the moment of formation of P1 of the starting pulse, which is separated from a certain phase of the working cycle for a specified time, consisting in forming in the first time interval limited by the phase angle of the working cycle, the value proportional to the duration of the working cycle the generated value of the duration of the second time interval, the beginning of which coincides with the initial phase of the working cycle, and the end determines the momentum of the formation of the starting pulse, The bones of the second interval are made by changing the value obtained in the first loop to the reading value. The variable value is presented as a digital current or voltage code. The phase angles that determine the duration of the first time interval and the interval that is between the initial and the specified working hours are chosen equal. FIG. 1 shows a structural electrical circuit diagram of a device implementing a pre. Loved way, see. 2 - time diagrams of his work. ....,., --- -. - -..-. --- T Example 1. The device consists of a phase angle sensor 1, the output of which is connected to the input of the control device 2. The output of the control device 2 is connected with the inputs of the integrated link 3, ... the output of which is connected to the input 4 of the comparator 5. Second input 6 is connected to terminal 7 of the source. Significance The code 8 of the comparison device 5 is the output of the device. ....- .. .... An integrated link 3 can contain, for: the switches of charge 9 and the discharge of W, whose inputs are connected to the corresponding outputs of the equipments 2, and the outputs are combined and are output. house of the integrating link 3 and connected to the limiting diode 11 and the capacitor 12. The second output of the diode 11 is connected to terminal 13 of the source CC2 initial magnitude. The device works as follows. In the Bbixona control system 2, the source conditions are canceled, which closes the charge 9 is closed and the discharge key 10 is open. The capacitor 12 is discharged, and the input 4 of the comparison device 5 contains a voltage, the value of which is determined by the initial voltage of the ETHC. The initial voltage source (terminal 13) and current is divided into source: the source of the initial value (terminal 13), diode 11, key charge. yes 10.; ;; -. .; -,: -.; . . - When a signal appears at the output of sensor I (Fig. 2, a), the duration of which T is defined; The time of passage of a certain phase angle P of the working chip (Fig. 2.6) of the control device 2 acting on the input, controlling the charge on the outputs of which change, the charge key 9 opens, and the discharge key 10 closes. T exists manager. The input channel of the control device 2 receives a linear charge of the capacitor 12 (Fig. 2, c) through the charge key 9, and by the time of the switching of the S1 signal from the sensor 1, the voltage on the capacitor 12 is proportional to the phase passage time T ztlp). After the termination of the control network, the end of which coincides with the beginning phase of the operating cycle, the voltage on the outputs of the control device 2 returns to its initial state, the charge key 9 is closed, the discharge key 10 opens, the capacitor 12 begins to linearly discharge during the time T n - & - b until the initial starting value Ej at terminal 13. The charging and discharging rate of the capacitor 12 is selected, based on the magnitude of the phase angles H and 2. After a time interval T, the linearly varying voltage the capacitor 12 will take the value of the reference value E and at the output of the comparator device 5 (fig. Ir) an impulse (fig. 2, e) is formed, which is separated from the determined phase of the Chopr duty cycle (phot. 2, a) for a given time Ai; O and R 2. A device for implementing the proposed method can be implemented on digital devices. In this case, the control device 2 must be equipped with a clock pulse generator (not shown on flash 1), and the integrating link 3 can be made in the form of a reversible counter. Tension Yotsach. on terminal 13 corresponds to the initial installation of the meter, i.e. The code at which the comparator device 5 is triggered 5. The charge of the capacitor 12 corresponds to the charge rate and the charge to the reversing account of the integrating link 3 (the reversing counter). When a device is executed on a unit of digital technology, it is convenient to choose phase angles H as equal. In magnitude, the phase angles must be equal to the maximum advance angle by the starting impulse of a certain phase of the operating cycle or be greater than it. . ; ; v.;. . Claim 1. The method O11 is determined by the moment of formation of the starting pulse separated from a certain phase of the working peak for a given time, consisting in forming in the first time interval, limited by the phase angle of the working cycle, a value proportional to the working cycle, and determined in the dependence on the formed the value of the length of the second time interval, the beginning of which coincides with the initial phase of the working cycle, and the end determines the time of the formation of the starting pulse, . So that, in order to simplify the determination of the moment of formation of the formating of the ro-inyjjbca, the determination of the duration of the second interval is carried out: with a linear change in the value obtained in the first interval, to a reference value. 2. A method according to claim 1, wherein the variable value is represented in terms of a digital current or voltage code. 3, the method according to claim 1, characterized in that the phase angles defining the duration of the first time interval, 158185 J concluded between the initial and defined phases of the work cycle, is chosen equal, Sources of information taken into account in the examination of 5 I. France Patent M 2303962, cl. R 02 P 5/08 published. 1976. 2. Patent Franchshsh No. 2269239, cl. F02 P5 / 08, publ. 1975 (prototype).