Device for limiting the rotational speed of the internal combustion engine (ice)

 

(57) Abstract:

The invention relates to internal combustion engines and electrical equipment intended to improve the accuracy limit of the engine speed. The device comprises a thyristor ignition system and the device to turn off the thyristor system about achieving the desired frequencies. As a tripping device ignition system applied digital oscillator, the output of which is connected to a control electrode of the thyristor, and the supply output is connected through the diode and resistor with control coil, in parallel power supply output is connected to the capacitor. 2 Il.

The utility model relates to a device limiting the rotational speed of the internal combustion engine, in particular for limiting the rotation frequency, using the ignition off electronic signals.

A device ignition internal combustion engine with a charging coil, which serves to charge the condenser ignition and which are rotatable magnetic force, and limiting device, speed, characterized in that:

parallel charged coil (2) turns on the electronic switch, which when increasing the number of turns briefly closes with AC charger is whether the auxiliary charging coil (21) through the Zener diode (24);

the Zener diode (24) is connected with the capacitor (22) that is charged to a voltage dependent on the speed, through the diode (23) from the phase that is not used for charging the capacitor plugs (4).

[The Federal Republic of Germany, application N 2606824 from 20.02.76, publ. 08.09.77, MKI F 02 P 11/00 (F 02 D 17/04)].

Closest to the technical nature of the achieved result when using a device to prevent an excessive increase of the rotational speed of the internal combustion engine in which a contactless ignition device charges the capacitor 5 with a positive voltage, which is generated in the coil 3 of the magneto 1, driven synchronously with the internal combustion engine, and produces ignition in internal combustion engines by rapid discharge of the capacitor 5 in the primary winding 13 of the coil 12 of the ignition when setting the trigger 6 to the conducting state by applying a negative voltage generated in the coil 3.

The device is characterized in that between the coil 3 and an ungrounded output capacitor 5 consistently included two thyristors 20, 21. Between the gate and cathode of the thyristor 20 is enabled scheme 23 voltage with a given time constant, which when it detects a positive voltage generated in the coil 3 sets terisi of rotation of the internal combustion engine to the preset value in the interval maintaining the conductive state of the thyristor 20 detects a negative voltage, generated in the coil 3 and sets the thyristor 21 in a conductive state. Through these steps, the device discharges the capacitor 5 through the thyristors 20, 21 in the coil 3.

[Japan, application N 1-35181, MKI F 02 P 11/02, publ. 89.07.24, N5-880, "inventions of the world" N 8, 1990, S. 57, the prototype].

Significant analogues as analogue, and the prototype is their complexity and low accuracy related:

with the range of voltages produced by the generators ignition system;

- temperature deviations of the parameters of the key element and the elements included in the inverter frequency-voltage.

The purpose of the utility model is to improve the accuracy limitations of speed and independence of accuracy from the influence of temperature and voltage variations produced by the generator ignition system, simplification of the device.

This objective is achieved in that the device for limiting the rotational speed of the internal combustion engine containing a thyristor ignition system and the device to turn off the thyristor system when reaching a predetermined frequency, is applied as a tripping device ignition system digital oscillator, the output of which is connected to upravlyayuthego supply output is connected to the condenser.

The digital generator in the inventive device allows you to ensure the stability and independence of the variations of the voltages produced by the generator ignition system, and its connection with the ignition system is to simplify the device.

In Fig. 1 shows the circuit of the thyristor ignition system with limiter speed power digital oscillator from the control coil.

In Fig. 2 is a timing diagram of voltages.

The device consists of a thyristor ignition system 1, including the charging coil 2, a charging diode 3, the storage capacitor 4, the thyristor 5, the high voltage transformer 6, 7, the control coil 8, the resistor 9, the diode 10, and the digital signal generator 11, including breathalyse resistor 12 and capacitor 13, two digital inverter 14, 15 and the diode 16, the digital signal generator 11 is fed from the control coil 8 through the diode 17, resistor 18 and capacitor 19.

The principle of the proposed device is explained using the timing diagram of voltages shown in Fig. 2.

Digital oscillator 11 (Fig. 1), Fed by voltage UPete.(Fig. 2) generates at all speeds one pulse Uo(Fig. 2) for ciclos at the output of the digital oscillator, constant at all speeds, as it depends only on the resistor 12 (Fig. 1) and the capacitor 13 of the oscillator 11. Therefore, at low speeds the pulse Uo(Fig. 2) generated by a digital oscillator for switching off the ignition, gets on the key element is a thyristor 5 (Fig. 1) at time T2(Fig. 2), equalass.when the thyristor is not applied no voltage and the ignition system is not included.

With increasing speed the time of charge of the capacitor 4 T1begins to coincide with the time T2, that is, the switching-off pulse Uo.opens the thyristor 5 (Fig. 1) and Western coil 2 is shunted them, the capacitor 4 is charged, the ignition system is disabled.

The proposed device has been factory and field trials and has proved to be positive.

Device for limiting the rotational speed of the internal combustion engine, containing a thyristor ignition system the ignition is switched off when reaching a predetermined frequency, characterized in that it contains as a tripping device ignition system digital oscillator, the output of which is connected to control the m parallel to the power supply output is connected to the capacitor.

 

Same patents:

The invention relates to internal combustion engines and electrical equipment intended for use in controlled ignition systems, turn off when the engine reaches a predetermined speed

The invention relates to a device for internal combustion engines, in particular, to a device for the ignition of the combustible mixture

The invention relates to heat engines (machines) operating on liquid, gaseous, mixed, solid, etc

The invention relates to internal combustion engines and electrical equipment intended for use in controlled ignition systems, turn off when the engine reaches a predetermined speed

FIELD: engines and pumps.

SUBSTANCE: invention can be used in propulsion engineering. Programmed destruction part (7) is designed to shut off emergent purging channel (6) extending through diesel combustion chamber (1) of outer wall (3). Combustion chamber (1) is arranged inside the cylinder and confined by outer side of piston (3) reciprocating in cylinder to make combustion chamber outer wall (3). Emergent purging channel (6) is made in outer wall (3). Said programmed destruction part (7) is designed to protect high-output direct-flow purge two-stroke cross-head diesel engines against possible damages caused by high overpressure (py) in combustion chamber (1) brought about by diesel faults. Said programmed destruction part (7) has the point of programmed destruction at outer wall (3) to be broken at pressure (ps) required for destruction of said point. Said pressure (ps) lower that overpressure (py) wherefrom engine faults start and above maximum tolerable pressure (pn) in combustion chamber under normal operating conditions. Said programmed destruction pressure (ps) at whatever temperature (T) in temperature range (T0-T1) in combustion chamber (1) is higher than threshold pressure (pu) and lower that destruction pressure (po). Said threshold pressure (pu) is higher than maximum tolerable pressure under normal operating pressure (pn) in combustion chamber. Destruction pressure (po) is lower the lowest overpressure (py) whereat diesel faults originate. Threshold pressure (pu) is higher by least pressure (Δpu) than maximum tolerable vale under normal operating conditions (pn) in combustion chamber and/or destruction pressure (po) is lower by at least (Δpo) than the lowest overpressure (py) whereat diesel faults originate. Threshold pressure (pu) is always 10% higher than maximum pressure (pn) in combustion chamber (1) under normal operating conditions, preferably, higher than 180 bar at destruction pressure (po) being lower than 270 bar. Programmed destruction point is composed of a ring around programmed destruction plate edge with thinner wall, unlike outer wall, and bent relative to combustion chamber. Programmed destruction part (7) is made integral with programmed destruction plate. Invention covers also the diesel engine, two-stroke cross-head diesel part and method of diesel faults prevention.

EFFECT: lower probability of diesel breakage.

37 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to ICE two-stroke engine rpm control means and processes. Particularly, it covers ignition dwell angle control relative to TDC. At preset engine rpm, ignition dwell angle can be adjusted step-by-step. Alternation between two ignition dwell angles can be performed in one or several steps. In case engine rpm exceeds the threshold magnitude, dwell angle can be adjusted.

EFFECT: efficient control over dwell angle, engine higher reliability and longer life.

17 cl, 3 dwg

FIELD: engines and pumps.

SUBSTANCE: start locking circuit is designed for an operating tool with an internal combustion engine (20). The internal combustion engine (20) contains a cylinder (21) with a combustion chamber (25) and a control unit (60) to provide the engine operation. When the engine is running the combustion chamber (25) is supplied with combustion air and fuel, wherein the air-fuel mixture in the combustion chamber (25) is ignited with an ignition plug (26). A mode selection switch is designed for actuating the internal combustion engine (20) and has an operating position and a starting position for air-fuel enrichment. The braking unit (19) for locking is coupled with the tool operating body. When in the operating mode, the braking unit (19) for locking locks the operating body with a brake, and when in a standby condition, it unlocks the operating body without actuating the braking system. An operation transmitter is connected with the braking unit (19) for locking to detect the operating mode of the locking braking unit. There is a position sensor in the mode selection switch. The status signal for the operation transmitter (19) of the locking braking unit and the status signal for the position sensor of the mode selection switch are interconnected in such a way that the control unit (60) stops the engine operation in all cases when the mode selection switch is in the starting position, and the locking braking unit (19) is in its standby condition with the braking system off.

EFFECT: avoidance of the engine start with rich mixture without switching the locking braking unit on, as the locking braking unit locks and brakes the tool operating body.

12 cl, 5 dwg

FIELD: engine devices and pumps.

SUBSTANCE: in one of the examples, the method of engine operation is disclosed comprising adjusting an actuator for the first time to automatically stop the engine; adjustment of the actuating mechanism for the second time before the engine reaches the zero rpm speed in response to the request to restart the engine; and adjusting throttle position of air intake at the time after closing the open intake valve of a cylinder having an open intake valve simultaneously with the request to restart the engine, and before closing the intake valve of the cylinder following in the combustion order in the engine in response to the request to restart the engine.

EFFECT: acceleration of engine starting after shutting down, reduction of fuel and emissions.

20 cl, 5 dwg

FIELD: engine devices and pumps.

SUBSTANCE: in one of the examples, the method of engine operation is disclosed comprising adjusting an actuator for the first time to automatically stop the engine; adjustment of the actuating mechanism for the second time before the engine reaches the zero rpm speed in response to the request to restart the engine; and adjusting throttle position of air intake at the time after closing the open intake valve of a cylinder having an open intake valve simultaneously with the request to restart the engine, and before closing the intake valve of the cylinder following in the combustion order in the engine in response to the request to restart the engine.

EFFECT: acceleration of engine starting after shutting down, reduction of fuel and emissions.

20 cl, 5 dwg

FIELD: mechanical engineering; internal combustion engines.

SUBSTANCE: invention relates to ignition timing control systems. It is aimed at optimization of process of conversion of energy of combusted fuel-air mixture into mechanical energy of engine crankshaft rotation. Proposed invention makes it possible to determine automatically and time optimum ignition moment of fuel-air mixture in any internal combustion engine irrespective of its condition, grade of fuel and environment. According to invention, commencement of moment of ignition of fuel-air mixture is regulated by results of end of burning. Burning process of fuel-air mixture is monitored by light-sensitive flame pickup, and after each cycle actual and preset time of burning of entire amount of fuel-air mixture is compared. Basing of obtained data, ignition timing for following cycle is corrected.

EFFECT: increased efficiency of internal combustion engine.

2 dwg

FIELD: engine engineering.

SUBSTANCE: method comprises accumulating energy required for igniting working mixture in the power accumulator, releasing energy in the device for generating igniting spark to generate spark discharge, repeated accumulating of energy starting before the end of releasing of the total energy accumulated, generating the next spark discharge, and measuring current in the spark discharge in the course of the generation of the spark discharge. When the current becomes lower than a given value, the repeated accumulating of energy begins. The device comprises energy accumulator for igniting working mixture, switching member for the energy accumulator that provides connection and disconnection of the circuit which connects the energy accumulator with a power source, control unit for control of the switching members, and device for determining the level and amount of energy accumulated in the energy accumulator. The control unit provides connection of the switching member at a moment when the level or the amount of energy accumulated in the energy accumulator becomes lower than a given value and provides its disconnection when it reaches again a given value.

EFFECT: enhanced reliability of ignition system.

12 cl, 2 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to machine building, particularly to power engineering and motor industry, and is designed to intensify chemical processes in working mixtures using a pulse-intermittent nanosecond high-voltage discharge in whatever internal combustion engines including (but no limiting) afterburners, detonation engine combustion chambers, jet engines and gas turbine engines, burners and reformers. The method of initiating ignition, intensifying combustion or reforming of fuel-air and fuel-oxygen (working) mixtures consists in the working mixture is excited in the combustion chamber by a pulsed-intermittent nanosecond high-voltage discharge, the discharge amplitude U[kV] is constrained by the following expression , i.e. 3·10-17>U/(L×n)>3·10-18, the high-voltage pulse front edge increase τf[ns] is constrained by the following condition, i.e. RC<τf<3·10-18×L2×n/U, while the high-voltage pulse duration τpulse[ns] is constrained by the following expression, i.e. 1017/n<τpulse<3·1031×(L×R)/(n×n) where U is the high-voltage pulse amplitude, [kV], L is a standard size of the discharge section, [cm], n is the molecules concentration in the discharge section unit space, [cm-3]. R is the supply line resistance [ohm], C is the capacity of spark gap [F].

EFFECT: lower mix ignition temperature, higher intensity of chemical reactions in combustion and reforming, higher engine efficiency and lower atmospheric emissions.

2 cl, 14 dwg

FIELD: physics.

SUBSTANCE: present invention pertains to plasma technology and can be used for igniting and intensifying chemical processes in a working mixture in any type of internal combustion engine. The method of making a high-enthalpy gas jet involves putting the working gas into a discharge gap and stimulating a pulsed gas discharge with nanosecond duration, by applying high voltage pulses to the electrodes of the discharge gap. Discharge takes place when there is excess voltage (2-10 times). The amplitude U [V], rise time of the pulse-leading edge τe [s] and pulse duration t pulse [s] are determined from the expression: 3·10-14>U/(L×n)>10-15, RC>τe<10-23×L2×n/U, 4·107/n<τpulse<1011LR/n, and pulse recurrence frequency f, [s-1] lies in the range (τpulse)-1 >f>V/L, where L is the distance between electrodes [cm], n is concentration of molecules in unit volume of the discharge section [cm-3], R is the resistance of the supply line [ Ω], C is the capacitance of the discharge gap [F], and V is the speed of gas in the discharge gap [cm/s]. The temperature of the plasma jet is regulated by varying the pulse frequency in a given range.

EFFECT: increased efficiency of transferring energy from external electrical circuit to gas, optimum homogeneity of the space filled with plasma and higher degree of dissociation of gas in discharge.

16 dwg

Inverter generator // 2415508

FIELD: engines and pumps.

SUBSTANCE: inverter generator includes generator unit (14), ignition module (12e), ignition control device (44), converter (20), inverter (26), central processor (40), ignition module (12e), and engine speed metre (14b4). Central processor (40) is the device for determining allowable excess rpm and at the same time the control device of inverter. Generator unit (14) is brought into action by ICE and generates alternating current. Converter (20) is connected to generator unit (14) and inverter (26). Inverter (26) is equipped with key elements. Control device of inverter controls the key elements by means of PWM signal. PWM signal is generated by using reference sine signal, as well as carrier signal with possibility of conversion of alternating current to current of the specified frequency. Ignition control device (44) controls ignition module (12e). Device for determining allowable excess rpm determines whether ICE is in excess rpm state or not. When rpm of ICE is exceeded, control device of inverter sends the command to ignition control device (44) to stop ICE. Inverter control device can be actuated in each control cycle. Device for determining allowable excess rpm counts the number of times when engine speed is equal to the first threshold value or exceeds it. Ignition control device (44) can contain analogue circuit.

EFFECT: possible protection of ICE against repeated excess rpm is provided.

4 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: there is the description of control method of plasma RF generator containing feed circuit (2) containing circuit breaker (9), controlled at least with one set of control pulses, supplying intermediate voltage (Vinter) at control frequency to the outlet to which resonator (6) generating a spark with two electrodes (103, 106) is connected when high voltage of certain level is supplied to feed circuit outlet. Method involves the reception of the first and the second measurement signals characterising the operation of internal combustion engine and type of generated spark, on-line control, depending on the received measurement signals, at least one parameter chosen at least from the level of intermediate voltage, control frequency and duration of series of control pulses to contribute to branching of the generated spark.

EFFECT: improving ignition reliability by preventing the spark concentration in the form of a single cord.

9 cl, 4 dwg

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises voltage generator 5 and ignition unit 9 including ignition plug 4 and switch 7 arranged between plug feed terminal and generator output. Switch 7 allows connecting voltage generator output with said ignition plug 4 in response to command signal VI. Device comprises electronic control unit UC to generate said command signal VI. Said electronic control unit UC comprises means M to measure magnitudes characterising generator output voltage variations in time and device A to vary current voltage and/or frequency depending upon magnitudes set by said measuring means. Generator output voltage variation describes health of ignition plug (new or worn-out).

EFFECT: control over quality of plug spark.

9 cl, 2 dwg

FIELD: automotive industry.

SUBSTANCE: electric power supply voltage on the ignition plug is increased stepwise to the relevant ignition voltage.

EFFECT: improvement of efficiency of ignition of the mixture entering the environment due to increasing the degree of bifurcation of radio frequency spark.

8 cl, 5 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to a device of radio frequency ignition of an internal combustion engine comprising a power supply circuit (2), which includes a transformer (T), the secondary winding of which is connected at least with one resonator (1), having resonant frequency exceeding 1 MHz, and comprising two electrodes made as capable of generating a spark for initiation of ignition of a combustible mixture in a cylinder of the engine in response to the ignition command. The device comprises: a measuring capacitor (Cmes), serially connected between the secondary winding of the transformer and the resonator; a circuit (40) of current measurement (Iion) at contacts of the specified measuring capacitor, at the same time the specified current is electric rating of combustion development; a protective circuit (30), connected between the metering capacitor and the measurement circuit, and made as capable of saving time on reading of measurement of the specified current (Iion) against electric impact that accompany the ignition command.

EFFECT: reduced period of measurement masking and independence of measurement on type of a generated discharge.

10 cl, 7 dwg

FIELD: engines and pumps.

SUBSTANCE: invention relates to RF plasma generators for ICEs. Proposed plasma RF generator comprises supply module (20) to feed excitation signal (U) to output interface in preset frequency (Fc) to fire spark (40) at plasma generation resonator (30). The latter is connected with supply module output interface. Besides, it comprises control module (10) to set supply module frequency in response to instruction on plasma RF generation. Control module comprises means to define optimum excitation frequency that can adapt preset frequency (Fc) to device resonance conditions after striking of spark.

EFFECT: possibility of control over RF plug supply in every cylinder, longer life.

8 cl, 3 dwg

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