Aircraft engines capacitive ignition system control device
SUBSTANCE: invention relates to field of transport and can be used for combustible mixtures ignition by means of electric spark, in particular in capacitive ignition systems for ignition system control, installed on aircraft engine, for ignition system technical condition evaluation in intervals between aircraft engines start-ups. Aircraft engines capacitive ignition system control device includes discharge current sensor, comparator, discharge current amplitude voltage check value setting device, time interval meter, actuator. Discharge current sensor output is connected to comparator first input, discharge current amplitude voltage check value setting device output is connected to comparator second input. Time interval meter output is connected to actuator. Control device additionally includes ambient environment pressure measuring transducer, containing serially connected ambient environment pressure sensor, amplifier, ambient environment pressure control voltage setting device, second comparator, univibrator, logical device "AND". Ambient environment pressure measuring transducer output is connected to second comparator first input. Ambient environment pressure control voltage setting device output is connected to second comparator second input, comparator output is connected to univibrator input, which output and second comparator output is connected to logical device "AND", by output connected to time interval meter input.
EFFECT: technical result is increasing of aircraft engines capacitive ignition system serviceability control reliability.
1 cl, 1 dwg
FIELD: engines and pumps.
SUBSTANCE: invention refers to method and device for spark energy increase, namely in small "capacitive-discharge ignition systems" without storage batteries intended for internal combustion engines in which striking voltage is created by means of generator and its control circuit, which are connected to handwheel or built into it. Spark energy increasing device includes at least one charging winding (L1), the first rectifier (D1), charging capacitor (C1), primary (L3) and secondary (L4) windings of voltage transformer, the second rectifier (D2) and switching element (Q2). Charging winding (L1) charges capacitor (C1) through the first rectifier (D1). Capacitor (C1) is connected to primary winding (L3). At low speed of engine the switching element (Q2) from time to time short-circuits charging winding (L1) in order to increase the charge of capacitor (C1). Device can contain control unit (M1). Unit (M1) controls switching element (Q2) so that level of charging voltage on charging capacitor (C1) is maintained relatively constant in the whole range of engine speed. Switching element (Q2) can be made so that short circuit can be created for the purpose of engine stop.
EFFECT: maintaining sufficient charge level of capacitor at lower rpm speed.
3 cl, 5 dwg
FIELD: technology for producing electric equipment used in aircrafts, in particular ignition device of aviation gas-turbine engines and liquid rocket engines, possible use for manufacturing products with usage of foamed plastics facing increased heat resistance and heat requirements.
SUBSTANCE: during production of electric equipment encased in packed or sealed cover, internal hollow of electric equipment cover is filled with fine-dispersed foamed plastic powder, cover is aged under increased temperature during the time, sufficient for foaming and solidification of foamed plastic, cover with electric equipment elements and solidified foamed plastic located within is cooled down, packed or sealed with installation of structural lid. In accordance to invention, cover with foamed plastic is aged at increased temperature and then cooled down, both under excessive pressure of gaseous substance surrounding the cover being heated.
EFFECT: increased heat resistance and strength of electric equipment encased in packed or sealed cover.
FIELD: transport engineering; electronic ignition system.
SUBSTANCE: invention relates to electronic ignition systems with capacitive energy storages. According to invention, multispark electronic ignition is provided by device containing electric breaker contacts, inductance coil, variator, self-excited oscillator built around bipolar transmistor, rectifier energy storage, diode and thyristor switches, thyristor switch control circuit and starting circuit and contact chatter protection circuit. At supply of car system voltage, self-excited oscillator is started and attains self-oscillation mode of operation. Voltage within the limits of 390 V is removed from secondary winding of self-excited oscillator and through rectifier said voltage charges capacitive storage. Diode and thyristor switches provide oscillatory process of discharging of energy storage through primary winding of inductance coil, and spark forming oscillating voltage is obtained at secondary winding.
EFFECT: provision of reliable sparking at changes of supply voltage within wide range, provision of multispark operation owing to multiperiod oscillatory discharge of reservoir capacitor.
3 cl, 1 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to a measurement device, comprising the following components: radio frequency ignition power supply circuit (2) containing a transformer (T) the secondary winding whereof (LN) is connected to at least of resonator (1) having resonance frequency in excess of 1 MHz and containing two electrodes (11, 12) designed so that to enable spark generation when an ignition command is given; measuring capacitor (Cmesure) placed in series between the secondary winding and the resonator; circuit (DIFF) for measurement of current (Iion) of gases ionisation during burning inside a cylinder of the internal-combustion engine linked to the resonator. The said measurement circuit is connected to the measuring capacitor contacts and/or - circuit (RED) for measurement of voltage (Vout) on the resonator electrodes contacts when an ignition command is given. The circuit is connected to the measuring capacitor contacts.
EFFECT: possibility of simultaneous measurement of ionisation current and voltage.
8 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
SUBSTANCE: device for radio frequency ignition includes control aids (5) designed with possibility of ignition control signal (VI) generation, power circuit (2) controlled by ignition control signal (VI) for power voltage supply to output interface (OUT) of power circuit at frequency determined by control signal, at least one resonator (1) of plasma generation connected to output interface of power circuit and designed with possibility of spark generation between two electrodes (10, 12) of ignition of the resonator during ignition command. This device includes means (6) for measuring of electrical parameter characterising change of resonator power voltage, module (7) for determination of state of electrodes contamination depending on measured electrical parameter and predetermined control value.
EFFECT: enhancing diagnostics of contamination state of radio-frequency coil-plug electrodes.
11 cl, 4 dwg
SUBSTANCE: ignition plug (BR) is connected to generator (GEN) containing variable capacitor. The above generator includes also polarisation tools (MPOL) with option of ignition plug (BR) polarisation, which are connected between generator (GEN) and ignition plug (BR), and measurement instruments (MMES) for measurement of ion current at ignition plug (BR), which are connected between variable capacitor (Cb) and chassis ground.
EFFECT: improvement of measurement accuracy.
8 cl, 6 dwg
SUBSTANCE: method of determining test discharge parametres of capacitive ignition systems which consist of an ignition assembly, ignition cable and a spark plug, involves picking up a discharge current and voltage signal and determination of values of discharge parametres. The discharge current and voltage signal is picked up using analogue sensors. The current and voltage signals are picked up in auxiliary "short circuit" and "test load" modes, as well as in the main operation mode of the ignition system. Measurements are taken in digital form with given sampling frequency. Values of characteristic primary parametres are distinguished from measurement results. Values of intermediate parametres are determined for each assigned measurement mode using the obtained values of characteristic primary parametres. Values of test discharge parametres are determined using the obtained values of intermediate parametres.
EFFECT: possibility of measuring primary discharge parametres in digital form, picked up by analogue current and voltage sensors, more accurate measurement, obtaining information on efficiency of the spark plug and ignition system, discharge mode and energy factors and their change during operation or during an experiment.
FIELD: engines and pumps.
SUBSTANCE: proposed invention relates to automotive ICE ignition devices. Proposed ignition device comprises ignition plug insulance recorders, anti-carbon devices, those to record the state of aforesaid anti-carbon devices and those to reveal conduction carbon deposits on ignition plug. With insulance falling below preset magnitude, engine is switched over to conditions allowing increasing ignition plug temperature. At aforesaid temperature, plug insulator cleaning of carbon deposit is intensified, the intensification process being recorded. With anti-carbonisation process readings exceeding preset ones and insulance below designed magnitude, increased carbon deposition is revealed and decided upon. In aforesaid case, light alarm signal on necessity of servicing ignition plug is issued.
EFFECT: intensification of carbon deposit removal from ignition plug.
10 cl, 8 dwg
FIELD: motors and pumps.
SUBSTANCE: in control device for internal combustion engines the pressure sensor (34) inside the cylinder is intended for measurement of pressure P in the cylinder of the internal combustion engine (10). When consecutive or almost consecutive premature ignition is detected by the pressure sensor in the cylinder (34) the control unit hinders the control of suppression of consecutive occurrence of premature ignition when Pmax during premature ignition is low, in comparison with when Pmax during premature ignition is high.
EFFECT: ensuring balance between prevention of excessive rise of the piston temperature and prevention of deterioration of various operational characteristics of internal combustion engines as a result of control applied for suppression of abnormal combustion even when abnormal combustion happens consistently or almost consistently during a series of cycles.
5 cl, 11 dwg
SUBSTANCE: method consists in software setting and subsequent execution of duration (indirectly of energy as well) of each separate spark discharge in any range of ICE rpm using a controller ROM of which is loaded with programs with constants of programming of functional dependence of this duration from the combination and intensity of the operating modes of ICE involved in its control and selected from its rpm, load, threshold temperature of cooling liquid, depth of leaning (quality) of fuel and air mix taking into account the brand of motor fuel. During ICE operation the controller processor selects according to technical information of sensors of selected modes in the ROM working program the constant of programming of optimum duration of forthcoming spark discharge with the subsequent execution of this parameter in each ICE cylinder. With the guaranteed rate of repetition of spark discharges limited only by technical capability of its practical use by the specific type of ICE and with indirectly adjustable energy considerably exceeding limiting capabilities of dominating systems with the normalized time of its accumulation in magnetic field of the ignition coil.
EFFECT: improvement of efficiency of ICE operation for the successful solution of the essential and predicted tasks of their modernization connected with improvement of environmental safety, thermal efficiency and specific dimensional power.
6 cl, 8 dwg