Ignition coil device

An ignition coil device includes a primary coil, a switching member, a secondary coil and a parallel circuit. The primary coil is to be connected to an external power source. The switching member switches an on state and an off state of electric power supply from the power source to the primary coil. The secondary coil generates a voltage that causes spark discharge at a spark plug as the electric power supply from the power source is switched from the on state to the off state by the switching member. The parallel circuit includes a series coil and a resistor. The series coil is connected in series with a conducting section that electrically connects the secondary coil to the spark plug. The resistor is connected to the conducting section in parallel with the series coil and having a fixed electric resistance value.

Method for determining the temperature of an ignition coil

A method for determining the temperature of an ignition coil ( 1 ), including a primary winding with a winding resistance (Rp), the primary winding being controlled by a control stage ( 2 ) with a foot resistance (Rsh), the method including the following steps: a) controlling the control stage in order to establish a primary control current; b) waiting for a predetermined time; c) determining the current Ip by measuring the voltage Vshunt and by dividing this voltage by the foot resistance Rsh; d) acquiring the value of the supply VB and the voltage Vice; e) determining the winding resistance Rp using the formula: Rp = VB - Vce Ip - Rsh f) determining the primary winding temperature using a temperature-resistance correspondence curve.

Signal detection circuit, igniter, and vehicle using the same

There are provided a signal detection circuit and an igniter capable of enhancing a capability of withstanding breakdown by noise. The signal detection circuit includes an input terminal Sin configured to receive a control signal from an ECU and a bidirectional floating diode provided between the input terminal and a ground. Further, the signal detection circuit includes an attenuation circuit configured to attenuate an output of the bidirectional floating diode, a low-pass filter configured to pass a low-frequency component of the output of the attenuation circuit, and a comparator configured to compare an output of the low-pass filter with a reference voltage.

SEMICONDUCTOR APPARATUS

A semiconductor apparatus is provided, comprising a power semiconductor element which is connected between a first terminal on a high-potential side and a second terminal on a low-potential side and is controlled to be turned on or off according to a gate potential, a cut-off condition detection section which detects whether or not a control signal that is input from a control terminal and controls the power semiconductor element satisfies a predetermined cut-off condition, and a cut-off circuit which controls the gate potential of the power semiconductor element to be an OFF potential in response to the cut-off condition detection section detecting that the cut-off condition is satisfied, and the cut-off condition detection section has an input terminal connected to the first terminal and the control terminal, and uses an electrical signal input from the input terminal as a power source. 1. A semiconductor apparatus , comprising:a power semiconductor element which is connected between a first terminal on a high-potential side and a second terminal on a low-potential side and is controlled to be turned on or off according to a gate potential;a cut-off condition detection section which detects whether or not a control signal that is input from a control terminal and controls the power semiconductor element satisfies a predetermined cut-off condition; anda cut-off circuit which controls the gate potential of the power semiconductor element to be an OFF potential in response to the cut-off condition detection section detecting that the cut-off condition is satisfied, whereinthe cut-off condition detection section has an input terminal which is connected to the first terminal and the control terminal and uses an electrical signal input from the input terminal as a power source.2. The semiconductor apparatus according to claim 1 , comprising:a first rectifying element which is connected between the control terminal and the input terminal of the cut-off condition ...

SEMICONDUCTOR APPARATUS

A semiconductor apparatus is provided, comprising: a power semiconductor element which is connected between a first terminal on a high-potential side and a second terminal on a low-potential side; a first gate control section which controls a gate potential of the power semiconductor element according to a control signal; a discharge circuit which is discharges charges that are charged by the gate of the power semiconductor element; a second gate control section which controls the gate potential of the power semiconductor element according to a collector current of the power semiconductor element; a feedback section which feedbacks the charges to the gate of the power semiconductor element according to the collector potential of the power semiconductor element; and a current cutting off section which cuts off currents flowing from the first terminal to the gate of the power semiconductor element according to the control signal. 1. A semiconductor apparatus , comprising:a power semiconductor element which is connected between a first terminal on a high-potential side and a second terminal on a low-potential side and is controlled to be turned on or off according to a gate potential;a first gate control section which controls the gate potential of the power semiconductor element according to a control signal that is input from a control terminal and controls the power semiconductor element;a discharge circuit which is connected between a gate of the power semiconductor element and a reference potential and discharges charges that are charged by the gate of the power semiconductor element;a second gate control section which controls the gate potential of the power semiconductor element according to a collector current of the power semiconductor element;a feedback section which feedbacks the charges to the gate of the power semiconductor element according to a collector potential of the power semiconductor element; anda current cutting off section which cuts off ...

IGNITION CONTROL APPARATUS

An ignition control apparatus of the present embodiment controls operation of an ignition plug provided so as to ignite an air-fuel mixed gas. The ignition control apparatus is characterized in that the ignition control apparatus includes: an ignition coil provided with a primary winding which allows a current to pass as a primary current therethrough and a second winding connected to the ignition coil, an increase and a decrease in the primary current generating a secondary current passing through the secondary winding; a DC power supply provided with a non-ground side output terminal, the non-ground side output terminal being connected to one end of the primary winding so that the primary current is made to pass through the primary winding; a first switching element configured of a semiconductor switching element provided with a first control terminal, a fist power side terminal, and a first ground side terminal, the semiconductor switching element controlling on and off states of current supply between the first power side terminal and the first ground side terminal based on a first control signal inputted to the first control terminal, the first power side terminal being connected to the other end side of the primary winding, the first ground side terminal being connected to a ground side; a second switching element configured of a semiconductor switching element provided with a second control terminal, a second power side terminal, and a second ground side terminal, the semiconductor switching element controlling on and off states of current supply between the second power side terminal and the second ground side terminal based on a second control signal inputted to the second control terminal, the second ground side terminal being connected to the other end side of the primary winding; a third switching element configured of a semiconductor switching element provided with a third control terminal, a third power side terminal, and a third ground side terminal, ...

Drive control circuit, and ignition device for internal combustion engine

A drive control circuit includes: a first protection circuit connected between a signal input line and a ground line and clamps a voltage of AC noise superimposed on the signal input line at one clamp level; a second protection circuit connected between the signal input line and the ground line and clamps the voltage of the AC noise superimposed on the signal input line at an other clamp level Vn; and a drive signal generation circuit generating the drive signal based on a comparison between a voltage in the signal input line and Vt. The input signal has binary levels including an L-level voltage VL and an H-level voltage VH, and a mean voltage of the AC noise is lower than a differential voltage between Vt and VL and higher than a differential voltage between Vt and VH.

CONTROL CIRCUIT FOR SEMICONDUCTOR SWITCHING ELEMENT, AND SEMICONDUCTOR DEVICE

A control circuit for a semiconductor switching element includes a control terminal, a main electrode terminal, and a current sensing terminal, and controls the semiconductor switching element including a diode connected to the main electrode terminal or the current sensing terminal. The control circuit includes an overheat detection circuit, a current detection circuit, and an interruption circuit. The overheat detection circuit outputs an overheat detection signal when a temperature detected based on an output of the diode is equal to or higher than a predetermined set temperature. The current detection circuit outputs a current detection signal when an output value of the current sensing terminal is equal to or greater than a predetermined set current value. The interruption circuit turns off the semiconductor switching element when both the overheat detection signal from the overheat detection circuit and the current detection signal from the current detection circuit are input. 1. A control circuit for a semiconductor switching element , the control circuit including a control terminal , a main electrode terminal , and a current sensing terminal and being configured to control the semiconductor switching element including a diode connected to the main electrode terminal or the current sensing terminal , the control circuit comprising:an overheat detection circuit configured to generate an overheat detection signal when a temperature detected based on an output of the diode is equal to or higher than a predetermined set temperature;a current detection circuit configured to generate a current detection signal when an output value of the current sensing terminal is equal to or greater than a predetermined set current value; andan interruption circuit configured to turn off the semiconductor switching element when both the overheat detection signal from the overheat detection circuit and the current detection signal from the current detection circuit are input.2. ...

IGNITION APPARATUS FOR INTERNAL COMBUSTION ENGINE

An ignition apparatus for internal combustion engine includes an ignition coil in which a main primary coil and an auxiliary primary coil are magnetically coupled with a secondary coil that is connected to a spark plug. In the ignition apparatus, a main ignition circuit unit controls energization of the main primary coil and performs a main ignition operation in which a spark discharge is generated in the spark plug. An energy supply circuit unit controls energization of the auxiliary primary coil and performs an energy supply operation in which a current that has the same polarity as a secondary current that flows through the secondary coil as a result of the main ignition operation is superimposed on the secondary current. The auxiliary primary coil includes a plurality of auxiliary-primary-coil portions. The energy supply circuit unit performs the energy supply operation using one or more of the plurality of auxiliary-primary-coil portions. 1. An ignition apparatus for an internal combustion engine , the ignition apparatus comprising:an ignition coil in which a main primary coil and an auxiliary primary coil are magnetically coupled with a secondary coil that is connected to a spark plug;a main ignition circuit unit that controls energization of the main primary coil and performs a main ignition operation in which a spark discharge is generated in the spark plug; andan energy supply circuit unit that controls energization of the auxiliary primary coil and performs an energy supply operation in which a current that has a same polarity as a secondary current that flows through the secondary coil as a result of the main ignition operation is superimposed on the secondary current, wherein:the auxiliary primary coil includes a plurality of auxiliary-primary-coil portions;the energy supply circuit unit performs the energy supply operation using one or more of the plurality of auxiliary-primary-coil portions;the plurality of auxiliary-primary-coil portions are connected ...

IGNITION COIL CONTROL DEVICE

An ignition coil control device includes: an energization control unit that controls to energize an ignition coil by first energization control and second energization control shorter in energization time than the first energization control; a cruise area determination unit that determines that a driving area of a vehicle is located in a cruise area on the basis of a throttle opening and an engine speed; and an integration counter that is incremented every predetermined time when the first energization control is being executed in the cruise area and is decremented every predetermined time in other cases. When a counter value of the integration counter reaches an upper limit value, a cooling process of switching from the first energization control to the second energization control is executed. Such ignition coil control device can appropriately switch energization time while preventing excessive heating of an ignition coil without using a current sensor. 17-. (canceled)8. An ignition coil control device that controls an ignition coil sparking an ignition plug of an engine that is a power source of a vehicle , the device comprising:an energization control unit that controls to energize the ignition coil by first energization control and second energization control shorter in energization time than the first energization control;a cruise area determination unit that determines that a driving area of the vehicle is located in a cruise area on the basis of a throttle opening and an engine speed; andan integration counter that is incremented every predetermined time when the first energization control is being executed in the cruise area and is decremented every predetermined time in other cases,wherein when a counter value of the integration counter reaches an upper limit value, the energization control unit executes a cooling process of switching from the first energization control to the second energization control, andwherein a second predetermined time during which ...

CIRCUIT AND METHOD FOR COIL CURRENT CONTROL

Circuits and methods to control a current in a coil are disclosed. The circuit and methods provide over-dwell protection and soft shut-down functionality to safely discharge the coil. The safe discharge of the coil is facilitated by a soft-start ramp signal that reduces the coil current gradually by controlling a switching device according. A profile of the soft-start ramp signal over time determines the gradual reduction. The profile of the soft-start ramp signal can be adjusted to set (i) an over-dwell period of the coil current, after which the coil current is shut down, and (ii) a soft shut-down period, over which the coil current is gradually reduced. 1. A circuit for controlling a current in a coil , the circuit comprising:{'sub': 'S', 'a capacitor connected between a source voltage (V) and an output node;'}a first switching device connected between the voltage source and the output node such that when the first switching device is in an ON state the output node is coupled to the voltage source, and when the first switching device is in an OFF state the output node is coupled to the voltage source through the capacitor; and{'sub': 'S', 'a voltage-controlled current-source (VCCS) connected between the output node and a ground, the VCCS outputting a current that charges the capacitor such that when the first switching device is moved from the ON state to the OFF state, a voltage is generated at the output node that decreases over a period from Vto a ground voltage according to a soft-start-profile.'}2. The circuit for controlling a current in a coil according to claim 1 , further comprising an insulated gate bipolar transistor (IGBT) having a collector coupled to the coil claim 1 , an emitter coupled to ground claim 1 , and a gate coupled to the output node such that the voltage generated at the output node reduces the gate-emitter voltage (V) of the IGBT to reduce a current through the IGBT and the coil.3. The circuit for controlling a current in a coil ...

IGNITION APPARATUS

The ignition apparatus includes: an ignition plug; a plurality of high voltage devices each configured to generate the high voltage and apply the high voltage between the first electrode and the second electrode; a leakage current detection device configured to detect a leakage current flowing between the first electrode and the second electrode; and a control device configured to control respective operations of the plurality of high voltage devices and the leakage current detection device. When the control device determines that leakage is present between the first electrode and the second electrode based on the leakage current detected by the leakage current detection device, the control device causes each of the plurality of high voltage devices to apply the high voltage between the first electrode and the second electrode at the same period. 1. An ignition apparatus , comprising:an ignition plug, which includes a first electrode and a second electrode arranged through intermediation of a gap, and is configured to ignite a combustible gas mixture in a combustion chamber of an internal combustion engine by generating discharge in the gap when a predefined high voltage is applied between the first electrode and the second electrode;a plurality of high voltage devices each configured to generate the high voltage and apply the high voltage between the first electrode and the second electrode;a leakage current detection device configured to detect a leakage current flowing between the first electrode and the second electrode; anda control device configured to control respective operations of the plurality of high voltage devices and the leakage current detection device,wherein, when the control device determines that leakage is present between the first electrode and the second electrode based on the leakage current detected by the leakage current detection device, the control device causes each of the plurality of high voltage devices to apply the high voltage ...

AN IGNITION SYSTEM AND METHOD CONTROLLING SP ARK IGNITED COMBUSTION ENGINES

The invention relates to an improved ignition system for spark ignited combustion engines. According to the invention the voltage over a coil winding P on the primary side of the ignition coil is regulated to a sufficiently low voltage level during timed periods of the ignition cycle, such that at least one function out of three in total, i.e. prevention of premature spark-on-make, or spark suppression after onset of ignition, or improved frequency response between primary and secondary side of the ignition coil after end of ignition, is obtained. When applied in an inductive ignition system a differential amplifier () may be connected over the primary winding P regulating a control switch CS via a drive unit (). The invention is preferably implemented in ignition systems with ion sense circuitry C,R on the secondary side of the ignition coil, and implementing all three functions. 120-. (canceled)21. An ignition system for a spark ignited combustion engine comprising:a control winding and a secondary winding of an ignition coil magnetically coupled to each other;the secondary winding of the ignition coil having a first terminal connected to a spark plug;wherein the control winding is connected to a control system with at least one predetermined voltage interval reference, wherein the control system controls the voltage across said control winding within the predetermined voltage interval reference such that impedance of the secondary winding of the ignition coil is influenced;a supply voltage source supplying a nominal voltage level to the ignition system; a control switch arranged in series with the control winding controlling flow of current through the control winding from the supply voltage source; anda voltage measuring circuit is connected over the control winding for measuring the voltage applied over the control winding and that a voltage control circuit is connected to the voltage measuring circuit and in response to the measured voltage controls a ...

CIRCUIT AND METHOD FOR COIL CURRENT CONTROL

Circuits and methods to control a current in a coil are disclosed. The circuit and methods provide over-dwell protection and soft shut-down functionality to safely discharge the coil. The safe discharge of the coil is facilitated by a soft-start ramp signal that reduces the coil current gradually by controlling a switching device according. A profile of the soft-start ramp signal over time determines the gradual reduction. The profile of the soft-start ramp signal can be adjusted to set (i) an over-dwell period of the coil current, after which the coil current is shut down, and (ii) a soft shut-down period, over which the coil current is gradually reduced. 1. A soft-start ramp generator , comprising:a capacitor; anda voltage controlled current source configured to generate an output current according to a plurality of operating characteristics based on a voltage across the capacitor, wherein the output current generated by the voltage controlled current source is configured to charge the capacitor such that when the capacitor is charged, the voltage controlled current source generates the output current according to each of the plurality of operating characteristics.2. The soft-start ramp generator according to claim 1 , wherein the plurality of operating characteristics includes:a first operating characteristic wherein the output current is a first current while the voltage across the capacitor is charged form a zero voltage to a first voltage.3. The soft-start ramp generator according to claim 2 , wherein the plurality of operating characteristics includes:a second operating characteristic wherein the output current is increased linearly from the first current to a second current while the voltage across the capacitor is charged from the first voltage to a second voltage.4. The soft-start ramp generator according to claim 3 , wherein the plurality of operating characteristics includes:a third operating characteristic wherein the output current is the second ...

Multiple-choice piggyback ignition booster circuit for internal combustion engines and other motors

A booster circuit for use with an ignition system for an internal combustion engine is provided. The booster circuit includes a relay control circuitry disposed in parallel between the voltage source and the one or more ignition coils for igniting fuel in the engine in synchronism with engine operation; a controllable switching element for selectively completing a booster circuit for connecting the relay control circuitry in series with the voltage source and the one or more ignition coils; and the booster circuit having electronic circuitry including at least one output for providing booster energy at the at least one output, when the booster circuit is completed by the controllable switching element to assure producing of a suitable voltage applied to the one or more ignition coils.

IGNITION CONTROL APPARATUS

An ignition control apparatus of the present embodiment controls operation of an ignition plug provided so as to ignite an air-fuel mixed gas. The ignition control apparatus is characterized in that the ignition control apparatus includes: an ignition coil provided with a primary winding which allows a current to pass as a primary current therethrough and a second winding connected to the ignition coil, an increase and a decrease in the primary current generating a secondary current passing through the secondary winding; a DC power supply provided with a non-ground side output terminal, the non-ground side output terminal being connected to one end of the primary winding so that the primary current is made to pass through the primary winding; a first switching element configured of a semiconductor switching element provided with a first control terminal, a first power side terminal, and a first ground side terminal, the semiconductor switching element controlling on and off states of current supply between the first power side terminal and the first ground side terminal based on a first control signal inputted to the first control terminal, the first power side terminal being connected to the other end side of the primary winding, the first ground side terminal being connected to a ground side; a second switching element configured of a semiconductor switching element provided with a second control terminal, a second power side terminal, and a second ground side terminal, the semiconductor switching element controlling on and off states of current supply between the second power side terminal and the second ground side terminal based on a second control signal inputted to the second control terminal, the second ground side terminal being connected to the other end side of the primary winding; a third switching element configured of a semiconductor switching element provided with a third control terminal, a third power side terminal, and a third ground side terminal, ...

SWITCH CONTROL CIRCUIT AND IGNITER

A switch control circuit controls a switch element connected to a primary coil of an ignition coil in accordance with an ignition signal. The switch element includes a transistor and a protection element connected between a collector and gate of the transistor. The switch control circuit uses a voltage at a gate terminal controlling the transistor or a voltage corresponding to a collector current of the transistor as a detection voltage and generates a status detection signal corresponding to a change in the detection voltage. 1. A switch control circuit that controls a switch element connected to a primary coil of an ignition coil in accordance with an ignition signal , wherein the switch element includes a transistor and a protection element connected between a collector and gate of the transistor , the switch control circuit comprising:a status detection circuit that uses a voltage at a gate terminal controlling the transistor or a voltage corresponding to a collector current of the transistor as a detection voltage and generates a status detection signal corresponding to a change in the detection voltage.2. The switch control circuit according to claim 1 , whereinthe status detection circuit includes a first comparator that compares the detection voltage and a first reference voltage and a second comparator that compares the detection voltage and a second reference voltage, andthe status detection circuit generates the status detection signal based on output signals of the first comparator and the second comparator.3. The switch control circuit according to or claim 1 , wherein the detection voltage corresponding to the collector current is a voltage at a terminal connected between an emitter of the transistor and a resistor connected to the emitter.4. The switch control circuit according to claim 2 , wherein the status detection circuit includes a capacitor claim 2 , charges and discharges the capacitor with the output signals of the first comparator and the ...

High-voltage ignition system for internal combustion engines

Ignition device for internal combustion engine

Dwell time controlling process in igniter for internal combustion engine

内燃機関の点火装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Ignition device

Ignition device for internal combustion engine

Input circuit for driving ignition system

Contactless ignition device for internal-combustion engine

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Ugnition device for an internal combustion engine

내용 없음. No content.

Contactless ignition device

Ignition system for internal combustion engine

Ignition system of internal combustion engine

FIELD: automotive industry; spark ignition systems. SUBSTANCE: according to invention, ignition system of internal combustion engine contain ignition coil consisting of primary and secondary windings and magnetic circuit, and spark gap placed in circuit of secondary winding of ignition coil. Ignition coil is made so that wave impedance ρ of oscillatory circuit formed by inductance and effective capacitance in secondary winding with due account of leakage currents is within where U j is minimum voltage at spark gap at which spark jumps the gap, I t is maximum tolerable current of spark discharge at which spark does not change into low-voltage arc discharge. Windings of ignition coil can be made, with increased magnetic field leakage flux, in form of pie, and magnetic circuit of ignition coil can be made of material with low specific losses for instance, of transformer iron designed for frequency of 400 Hz. EFFECT: increased power of spark and improved reliability of formation of spark in ignition system with resulting improved reliability of operation of engine at low temperatures and/or high humidity and at poor quality of fuel-air mixture. ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß RU (19) (11) 2 287 080 (13) C1 (51) ÌÏÊ F02P 3/02 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2005113815/06, 05.05.2005 (72) Àâòîð(û): Áðèæèí¸â Ìèõàèë Ïàíòåëåéìîíîâè÷ (RU) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 05.05.2005 (45) Îïóáëèêîâàíî: 10.11.2006 Áþë. ¹ 31 (73) Ïàòåíòîîáëàäàòåëü(è): Áðèæèí¸â Ìèõàèë Ïàíòåëåéìîíîâè÷ (RU), Èíñòèòóò ïðèêëàäíîé ôèçèêè ÐÀÍ (RU) R U Àäðåñ äë ïåðåïèñêè: 603950, ã.Íèæíèé Íîâãîðîä, ÃÑÏ-120, óë. Óëü íîâà, 46, Èíñòèòóò ïðèêëàäíîé ôèçèêè ÐÀÍ, ïàòåíòíà ãðóïïà, Î.Â. Áàáèíîé 2 2 8 7 0 8 0 îáðàçîâàííîãî èíäóêòèâíîñòüþ è ýôôåêòèâíîé åìêîñòüþ âî âòîðè÷íîé îáìîòêå, ñ ó÷åòîì òîêîâ óòå÷êè ëåæèò â èíòåðâàëå: , ãäå Uïðîá - ìèíèìàëüíîå çíà÷åíèå íàïð æåíè íà ðàçð äíîì ïðîìåæóòêå, ïðè ...

Electronic lead angle igniter

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Ignition device of internal combustion engine

A monitoring resistor in series with the spark coil primary winding and the electronic interruptor switch provides a signal to an integrator for shifting the control thresholds of a threshold switch that controls the interruptor away from their quiescent values that are nearer the zero crossover of the timing voltage wave provided by an engine driven timing signal generator. The integrator output voltage remains constant during the time the interruptor switch is open. While current flows through the interruptor circuit, the integrator increases the control voltage until the primary winding current reaches a predetermined level and then decreases the control voltage until the timing wave recloses the interruptor. While the control voltage is being decreased, the coil current is allowed to rise to a limiting value and is then held constant by another circuit controlled by the monitoring resistor that slightly reduces the conductivity of the interruptor switch in its closed condition, but this occurs only while the engine is accelerating to the operating speed range. During this time the switch-on threshold for controlling the interruptor is raised towards the peak of the timing wave, but the switch-off threshold is clamped to its initial value. With further increase in engine speed, the net effect of the integrator operation changes sign and the switch-on threshold is lowered. As soon as the switch-on threshold goes below its initial value, the switch-off threshold is unclamped and is depressed along with the switch-on threshold towards the negative peak of the timing wave by the integrator action. The result is to keep the amount of energy stored in the spark coil at the time of primary circuit interruption constant over a wide range of speed.

No-contact igniter

Contactless igniting apparatus

Method of controlling ignition

Patent FR2330876B1

Ignition circuit for internal combustion machines

Electronic ignition device for internal combustion engines

Patent FR2217565A1

AUTOMOTIVE VEHICLE COMBUSTION ENGINE IGNITION SYSTEM

Patent FR2199349A5

IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINE

Ignition device for fuel mixtures

IGNITION COIL OF INTERNAL COMBUSTION ENGINE AND ELECTRONIC IGNITION DEVICE COMPRISING THE SAME

L'INVENTION CONCERNE UNE BOBINE D'ALLUMAGE DE MOTEUR A COMBUSTION INTERNE ET UN DISPOSITIF D'ALLUMAGE ELECTRONIQUE COMPORTANT CETTE BOBINE. LA BOBINE 3 COMPORTE DEUX ENROULEMENTS PRIMAIRES C, C QUI RECOIVENT DES COURANTS PRODUITS PAR DEUX AMPLIFICATEURS 21, 22 COMMANDES PAR UN MEME GENERATEUR 1 DE SIGNAUX DE COMMUTATION. LA DISPOSITION EST TELLE QUE SI L'UN DES AMPLIFICATEURS 21, 22 EST DEFAILLANT, L'AUTRE CONTINUE A FONCTIONNER POUR ASSURER L'ALLUMAGE. L'INVENTION S'APPLIQUE NOTAMMENT AUX VEHICULES AUTOMOBILES. THE INVENTION RELATES TO AN INTERNAL COMBUSTION ENGINE IGNITION COIL AND AN ELECTRONIC IGNITION DEVICE INCLUDING THIS COIL. COIL 3 INCLUDES TWO PRIMARY WINDINGS C, C WHICH RECEIVE CURRENTS PRODUCED BY TWO AMPLIFIERS 21, 22 COMMANDED BY A SAME GENERATOR 1 OF SWITCHING SIGNALS. THE PROVISION IS SUCH THAT IF ONE OF THE AMPLIFIERS 21, 22 IS FAULTY, THE OTHER CONTINUES TO OPERATE TO ENSURE IGNITION. THE INVENTION APPLIES IN PARTICULAR TO MOTOR VEHICLES.

Ignition system for internal combustion engine

The ignition system has, on the primary side of the coil (10), a battery (16), a capacitor (24) and a thyristor (28). A second electrical supply (20), with a voltage at least an order of magnitude greater than the battery, is connected to the capacitor through a resistor (22). The thyristor cathode is connected to a MOSFET (18) with its gate polarised to a fraction of the primary voltage.

Spark ignition device

Ignition method and circuit for an internal combustion engine

Method for triggering the combustion of the gaseous mixture contained in a cylinder of an internal combustion engine, in which a voltage peak is generated at the terminals of a spark plug in order to cause a spark there. For this purpose, an electric generator is connected in series with the said spark plug when the voltage at the terminals of the latter, after having passed through its maximum, stabilises at a value corresponding to the arcing voltage.

Patent FR2217565B1

Electronic ignition device for internal combustion engine

Processing circuit for ignition coil pulse signal - comprises flip=flop producing square wave output of fixed pulse length

The signal processing circuit receives the noisy ignition coil signal and from it derives a clear signal which may be used to supply an electronic rev counter, and electronic carburation mixture control, or an excess speed warning device. The circuit used comprises a D-type flip-flop whose clock input is connected to the ignition coil. The signal input is biased to a fixed constant level. The output signal from the flip-flop is connected to the return-to-zero input via a delay element. The components of the circuit are formed on a single micro-chip of semiconductor substrate, and fitted into a standard box to minimise production cost. The circuit produces a square wave output with a set pulse duration instead of the pulse of higher frequency produced by the ignition coil.

Ignition system for internal combustion engine - maintains constant duration of spark independently of engine speed

IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

A.INSTALLATION D'ALLUMAGE DESTINEE A UN MOTEUR A COMBUSTION INTERNE. B.DANS CETTE INSTALLATION, OU UN ETAGE DE SAISIE DE LA VITESSE DE ROTATION PERMET D'AMENER A UN CONTACTEUR ELECTRIQUE UN SIGNAL DE COMMANDE, IL EST PRODUIT UN SIGNAL D'ALLUMAGE, DERIVE DU DISPOSITIF EMETTEUR, ET QUE SUIT UN SIGNAL DE COMMANDE POUR UNE VITESSE DE ROTATION INFERIEURE A UNE VALEUR PREDETERMINEE ET QUE PRECEDE UN SIGNAL DE COMMANDE POUR UNE VITESSE DE ROTATION SUPERIEURE A CETTE VALEUR PREDETERMINEE. C.L'INVENTION S'APPLIQUE PRINCIPALEMENT AUX DISPOSITIFS D'ALLUMAGE DE MOTEURS A COMBUSTION INTERNE. A. IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINE. B. IN THIS INSTALLATION, WHERE A ROTATION SPEED ENTRY STAGE MAKES AN ELECTRICAL CONTACTOR A COMMAND SIGNAL, AN IGNITION SIGNAL, DERIVED FROM THE TRANSMITTING DEVICE, FOLLOWS A COMMAND SIGNAL FOR A ROTATION SPEED LESS THAN A PREDETERMINED VALUE AND THAT PRECEDES A COMMAND SIGNAL FOR A ROTATION SPEED GREATER THAN THIS PREDETERMINED VALUE. C. THE INVENTION APPLIES MAINLY TO IGNITION DEVICES OF INTERNAL COMBUSTION ENGINES.

IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES

Electronically controlled ignition system for IC engine - has rapid switching transistor circuit in series with coil and contact breaker reducing switching time

Procédé d'allumage électronique pour moteurs à allumage commandé et dispositif de mise en oeuvre dans lequel le rupteur mécanique et la bobine de Ruhmkorff sont reliés au travers d'un ensemble électronique constitué d'un détecteur à seuil, d'un inverseur de fonction et d'un amplificateur de puissance dont la sortie exerce une réaction sur le détecteur à seuil et l'inverseur de fonction.

Ignition device for internal combustion engines

Patent FR2295248B2

Patent FR2430522B1

Ignition system

Ignition device for internal combustion engine

It is an object of the present invention to provide an ignition system for an internal combustion engine which accomplishes a stable current blocking operation of an ignition coil. A main IGBT (110) controls to conduct or block a primary current flowing through the ignition coil in response to an input ignition control signal to generate a high voltage on the secondary side of the ignition coil. The main IGBT (110) and a current limiter circuit (150) are integrated in a monolithic silicon substrate of an insulating gate bipolar power transistor. The main IGBT has a collector and a gate connected through a depletion IGBT (152) forming part of a constant current circuit, and a resistor (R4). When a voltage generated across the resistor (R4) becomes equal to or higher than a zener voltage, a zener diode (ZD2) leads this current to an emitter of the main IGBT.

Internal combustion engine contactless ignition system of supply voltage variation compensation type

ABSTRACT OF THE DISCLOSURE An internal combustion engine contactless ignition system of the supply voltage variation compensation type in which the length of time an ignition coil is energized is controlled by an input transistor in response to an alternating current signal synchronized with the rotation of an engine and the operating level of the input transistor is automatically shifted in response to variation of the voltage of a power source, further comprises an inverting transistor having a base connected to the collector of the input transistor, an emitter connected to one end of the power source through a common emitter resistor and a collector connected to the other end of the power source through collector resistors and a Zener diode whereby an ignition coil energization controlling power transistor is controlled through the inverting transistor.

Series stacked ignition system using series diodes in the bases

Contactless ignition systems for internal combustion engines

An off-time control circuit (4) drives an output transistor (10) connected in series with a primary winding of an ignition coil (12) while controlling the off-time in each ignition period so that the ratio TilT between the period of time Ti, during which the level of primary current (ic) supplied to the primary winding of the ignition coil (12) attains a predetermined setting (ico). and the ignition period (T) can be maintained constant. The output from a current detecting resistor (11) connected to the primary winding is applied to a rising time detecting circuit (8) which detects the rising time (Tc) of the primary current (ic) from the current supply starting time to the time of attainment of the predetermined setting (ico). The off-time control circuit (4) controls the starting timing of power supply (13) to the output transistor (10) depending on the output (K 2 ) from the rising time detecting circuit (8).

Improvements to the ignition of fuel mixtures and devices including application

Ignition device

Improvements to electronic ignition devices

Spark ignition device for internal combustion engines

Spark ignition systems for internal combustion engines

1460731 Ignition systems LUCAS ELECTRICAL Ltd 21 Dec 1973 [10 Feb 1973] 6687/73 Heading F1B A spark ignition system for an internal combustion engine includes a switching device 33 in series with the primary winding 34 of an ignition coil 35 and means for turning the device 33 on to store energy in the winding and off to produce a spark and comprises engine driven switch means (contact breaker 16) and a switching circuit controlled by the switch means and coupled to the switching device, the switching circuit being biased to a first state in which it turns the switching device off but being driven to a second state when the, switch menas 16 closes, the switching circuit then turning the switching device on and the switching circuit returning to its first state in normal operation when the switch means re-opens. A capacitor 19 couples the switch means to the switching circuit and is arranged so as not to become fully charged in the period during which the switch means is closed in normal engine operation but to become fully charged if the engine stalls with the switch means closed, the switching circuit reverting to its first state when the capacitor is fully charged so as to restrict the on-time of the switching device in an engine-stalled condition to a level greater than the maximum normal on-time of this device.

Contactless ignition circuit for internal combustion engines

This invention relates to a contactless ignition circuit for internal combustion engines characterized in that a primary short-circuiting current flowing through the primary winding of an ignition coil is made to flow through a power transistor controlled to be conducted and interrupted by a photoswitching means, the formation is small and simple, the contact is not worn and the life is long.

Ignition system for internal combustion engine

IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

Ignition switching device.

An ignition switching device for ignition systems of vehicles includes components having the form of a chip or of a printed thick film connected by strip conductors, a heat dissipating base (1) and a plastic housing (11). Contrary to the bases in use today, made of metallic plates, the base (1) is made of aluminium nitride. Preferably, the aluminium nitride base carries a metal layer which acts at the same time as a connecting element. The plastic housing (11) is glued to the aluminium nitride base (1).

IGNITION DEVICE FOR EXPLOSION ENGINES

DEVICE FOR PERIODIC CHARGING OF A COIL, ESPECIALLY FOR IGNITION COILS OF INTERNAL COMBUSTION ENGINES

ELECTRONIC IGNITION SYSTEM FOR AN ENDOTHERMAL ENGINE

Patent JPS5918549B2

Non-contact igniter

Patent FR2418875B1

Igniter for internal combustion engine

IGNITION DEVICE FOR INTERNAL COMBUSTION ENGINES

Ce dispositif comprend, à côté des circuits classiques, un circuit de commande comportant un premier et un second transistors reliés l'un à l'autre selon un montage << compound >>, le signal limiteur de courant fourni par un circuit limiteur de courant étant appliqué au premier transistor tandis qu'un signal de réglage d'allumage est appliqué au second transistor. Le montage de ces deux transistors 200 et 202 est représenté dans l'ensemble du schéma de la figure 2 B. This device comprises, besides conventional circuits, a control circuit comprising a first and a second transistors connected to one another in a "compound" arrangement, the current limiting signal supplied by a current limiting circuit. being applied to the first transistor while an ignition adjustment signal is applied to the second transistor. The assembly of these two transistors 200 and 202 is shown in the whole of the diagram of FIG. 2B.

Circuit arrangement for controlling and regulating the ignition energy of ignition sparks in spark plugs of internal combustion engines

Ignition system of engine

Device for controlling the ignition timing of an internal combustion engine

Device for suppressing undesired ignitions in a spark ignition engine

The primary winding of an ignition coil is connected in series with an ignition switch that can be switched by a control circuit. A circuit including a capacitor, a resistor, and a diode is configured between the control terminal and the collector of the ignition switch. When the primary current is switched on, the capacitor discharge brings about a voltage reduction at the base of the ignition switch resulting in slowing down the trailing voltage edge at the collector of the ignition switch.

Ignition system for internal combustion engine

Ignition system

Ignition device of internal-combustion engine

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Ignitor for internal combustion engine

Ignition system for internal combustion engine

IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINE

Monolithically integrated power IGBT device

A power IGBT device is monolithically integrated to include an input terminal suitable to receive an input voltage and an output terminal suitable to supply a current having a limited and predetermined highest value. Such IGBT device includes an IGBT power element inserted between said output terminal and a supply reference. The power element has a control terminal connected to the input terminal through a control circuit that includes at least a transistor inserted between the control terminal and the supply reference voltage and a resistive element inserted between the input terminal and the control terminal.

Patent JPH0128223B2

Ignition system having improved spark-on-make blocking diode implementation

An ignition coil assembly (10) includes a high voltage (HV) diode (32, 38) at both ends (34, 42) of the secondary winding (24). The diodes (32, 38) prevent a spark-on-make condition. The diode implementation has particular benefits when used in a 42 volt automotive electrical system.

Patent FR2078130A5

Ignition systems for internal combustion engines

1,080,083. Electromagnetic pulse generators. FORD MOTOR CO. Ltd. Feb. 16, 1966 [April 14, 1965], No. 6759/66. Heading H2A. [Also in Division F1] The Fig. shows a pulse generator for controlling an ignition system (see also Division F1). The generator includes a stator 122 that has an annular permanent magnet 123 constructed, for example, of barium titanate. An annular magnetic flux gate element 124 is positioned radially outward from the permanent magnet 123. The rotor 145 includes a rotatable plateshaped armature 146 that has a number of depending teeth 147 that correspond in number to the number of teeth on the plates 131 and 132. The arrangement and shaping of the teeth is described with reference to Figs. 8 and 9 (not shown).

Ignition system for internal combustion engines

Electric ignition device for internal combustion engines

Ignition system for internal combustion engine - maintains constant duration of spark independently of engine speed

The system utilises an electronic circuit which can estimate the duration of one cycle of ignitiona nd can also fix the time of ignition with reference to the engine cycle so that the circuit of the ignition coil is opened and closed to provide a constant period of coil energisation at the precise phase of the engine cycle. This is achieved by using a condenser which retains a predetermined level of the charge acquired during the previous cycle and is then allowed to discharge at a constant rate by means of an isolating diode, a storage condenser and a transistor associated with a resistance.

Electronic control unit with common ground connection to a heat sink

The invention relates to an electronic control unit, in particular an ignition control unit, containing an electronic circuit in the form of a hybrid circuit arranged on a heat sink, and having a plastic housing element containing the plug terminal jack. There is an electrical connection between the ground connection of the hybrid circuit and a plug terminal. In accordance with the invention, the ground connection between the hybrid circuit and the plug terminal is connected to the heat sink by electrically conducting parts contained in the plastic housing element.

Ignition apparatus

Control circuit for an electronic driving device of inductive loads, in particular for a device with an input signal having, at the high logic state, non optimal voltage value

A control circuit (6) for an electronic driving device (9) of inductive loads is described, comprising at least a control block (1, 10) activated by a trigger signal (V TRIGGER ) having at the high logic state non optimal voltage values and output-connected to a control terminal of a power element (TR1) of the electronic driving device (9). The control circuit also comprises an auxiliary current generator (A) capable of delivering a current (I AUX ) to be added to the current (I DRIV ) outputted by said control block (1, 10) to supply a driving current I GATE .

Ignition device for internal combustion engines