Free format text: 40,234 km) and that of distributor less ignition system is 100000 miles (ca. 8B for explaining the manner of the circuit, the I, Nevertheless a need still remains for reduction of rated power and miniaturization of ignition coils, especially when said coils are disposed directly on spark plug heads. Two ignition coils T1 and T2 have primary windings PR1 and PR2 which are driven by ignition modules No.1 and No.2 correspondingly. Secondary windings SEC of the ignition coils T1 and T2 are coupled in series with spark plug electrodes and the SSE module. This sequence is repeated for all cylinders. 8A, one can see there is no difference between the switching means control methods of the present invention and prior art ignition system. 2; FIG. 4,326,493 issued to J. Merrick, and U.S. Pat. A distributorless ignition system according to claim 1 further comprising unidirectional means, each of them being connected across the primary winding of each trigger ignition coil means or the respective pair of the primary windings of the trigger ignition coil means for shunting these windings after electrical break-down in the corresponding spark plugs. Due to the use of multiple ignition coils Which provides direct voltage to the spark plugs this system is also known as Direct Ignition System (DIS). 1B, V, When the switching means 38a turns off, spikes of voltage are produced across the windings of the basic and trigger ignition coil means 14, 22a and 22b. Also, it faces mechanical and electrical wear and tear. (v) This high voltage is then sent to the spark plugs and the generation of sparks takes place. semiconductor devices or the ignition coil, Opening or closing the primary coil circuit with semiconductor devices, Opening or closing the primary coil circuit with semiconductor devices using digital techniques, Arrangements of distributors, circuit-makers or -breakers, e.g. There are 2 obvious differences: • A DI system does not have a mechanical distributor. The distributor's main function is to route secondary, or high voltage, current from the ignition coil to the spark plugs in the correct firing order, and for the correct amount of time. Sent to the ignition module which in turn senses the signals and the current stops to 8A. Main Components Battery: Same as the electronic ignition system, Battery is used as the powerhouse for the DIS. In FIG. One of the objects of the present invention is to increase electrical energy which is emitted between spark plug electrodes during each ignition firing and minimize rated power, size and weight of ignition coil means which are disposed on the spark plug heads. Distributorless ignition system components. Referring to FIG. 3 is a variation of the second embodiment shown in FIG. Thus, inductance of the secondary winding 26a will be neutralized for the current I, The manner of the circuit shown in FIG. Building on the elegantly simple design of the original Electromotive distributorless ignition system, the XDi provides unmatched performance and reliability and combines them into a cost-effective controller that will handle most any engine. Distributorless ignition system Download PDF Info Publication number US5125387A. Your email address will not be published. DIS ignition systems use one ignition coil for every two cylinders. 4 is a circuit diagram of a distributorless ignition system according to the fourth embodiment of the present invention; FIG. Working of Distributorless Ignition System. 2. The structure of high frequency ignition devices is complex and supposes use of step up DC to DC converters to reduce time for energy accumulation in inductors and capacitors. In Stock; Product Type. Because ignition coils with laminated iron cores have more capacity for accumulation of energy in magnetic field than coils with other core materials, they are still commonly used. Distributorless Ignition System: Introduction The electronic ignition system is used in almost all the latest super and hyper series cars and bikes; however, this system has a few limitations. Energy released as a result of this elimination enhances significantly the ignition energy emitted between spark plug electrodes. And forces him to innovate more to achieve an ideal system, 7. But there is no distributor in this system, the components used are, (i) Ignition Coils: Unlike electronic ignition system in which a single ignition coil is used to Generate high voltage, DIS uses several ignition coils. A direct fire ignition has one coil and igniter per cylinder. In the above mentioned ignition system reduction of inductance L (which results in reduction of energy that can be stored in the ignition coils T1 and T2) causes shortage of the ignition time T. Enhancing of ignition power may be also achieved by means of high frequency sparking that is set forth in U.S. Pat. No. As is shown by John B. Heywood in his `Internal Combustion Engine Fundamentals`, McGraw Hill, Inc., 1988, FIG. Info. No distributor cap and rotor. 3. 2 is a circuit diagram of a distributorless ignition system according to the second embodiment of the present invention; FIG. 4. 1 reference numeral 10 designates a 12 V battery as a direct current (DC) source providing a direct current voltage V, Referring now to FIG. 3, the first transient voltage suppression means 42 is provided with a resistor 48 and a capacitor 50. January20, 2010 |10 LEEC-Automotive Systems • IGNITION DISTRIBUTOR- distributes ignition voltage to the spark plug. Which in turn induced EMF in the secondary winding of the coils and increases the voltage up to 70000 volts. 1; FIG. 4,938,200 issued to S. Iwasaki. The ignition coil may be designed as a separate unit, called a coil pack or may be built as several ignition coils integrated into a single unit. Distributorless Ignition System. DISTRIBUTORLESS IGNITION SYSTEM Installation and Adjustment Instructions 1.0 INTRODUCTION: Congratulations on your purchase of a Holley® Distributorless Ignition System! No moving parts to wear out. In FIG. Thus, let’s learn the basics of how a distributor-based system works. (ii) DIS is first used in 2.8 L VR6 engine equipped Volkswagen Passat. Connected to the ignition module and coils assembly, (which makes and breaks the circuit). In comparison with prior art distributorless ignition system, the disclosed ignition system is cheaper, more efficient and reliable. The spike of the V, This equation shows that the switching means 36a in on-off stage withstands basically the V, In the `post-break-down` phase during the interval T, In the second embodiment of the present invention shown in FIG. Another benefit of a crank-triggered ignition is the opportunity to move to a distributorless system such as the OE-style coil-per-cylinder design used for years now on production vehicles. The first two types of ignition system, breaker-point system and electronic system, are both distributor-based, in contrast with the other two distributor-less systems. There are two types of ignition systems used on OBD1 (and some OBD2) GM engines (exc LT1, Vortec Truck, and LS engines). The first end of the secondary winding of each trigger ignition coil means is electrically connected to its spark plug and the second end thereof is electrically connected to the secondary winding of the basic ignition coil means. For Late model engines with distributorless ignition systems (DIS), we offer a variety of DIS Ignition's from street to racing units. Necessary to develop a system that can overcome these limitations which are as follows-. Contains either mechanical contact points or an electronic switching circuit. Ignition Switch: It governs the ON and OFF of the ignition system. 5 and FIG. 2 reference numerals 36d, 36f and 36c designate individual switching means with switching transistors 38d, 38f and 38c which are provided for the pair of the trigger ignition coil means 22a and 22b, for the pair of the trigger ignition coil means 22c and 22d, and for the basic ignition coil means 14 correspondingly. 3; FIG. Which generates high voltage individually for each spark plug. Let’s just find out. 2A is a timing diagram for the circuit diagram shown in FIG. A distributorless ignition system for an internal combustion engines according to the present invention will be explained in detail with reference to the accompanying drawings. Share. When configured with individual coils, a repair can be as simple as replacing just the bad coil pack. Disclosed is a distributorless ignition system of inductive discharge type for internal combustion engines. Distributorless Ignition System (DIS) is the ignition system in which the distributor of the electronic ignition system is replaced with number of induction coils i.e. (ii) The triggering wheels mounted on the camshaft and crankshaft have equally spaced teethes with one gap, All 5.7L HEMI engines are Transient voltage suppression means cuts off transient voltage spikes, that may occur as a result of switching, and protects system components from overvoltage. This way said winding is being discharged across two corresponding spark plugs, connected in series through the ground. Fires alternate cylinders simultaneously for cleaner and more efficient fuel burn. Distributorless - Holley. FIG. So, the questions arise, Can we avoid the use of distributors in an ignition system? The purpose of the first transient voltage suppression means 42 is primarily to suppress the transient voltage across the secondary winding 18 caused by initial spark plug current. Said second means 52 may include a Zener diode 54 with threshold voltage of about 10 V, a capacitor 56, a series resistor 58 and a diode 60. The manner of the circuit shown in FIG. No. (iii) When these gaps come in front of the positioning sensors, The distributor and ignition timing are all a part of an electronic control unit or ignition module (fig. 4, each of the basic and trigger ignition coil means 14, 22a, 22b, 22c and 22d is provided with its individual switching means 36c, 36g 36h, 36j and 36k correspondingly. For Late model engines with distributorless ignition systems (DIS), we offer a variety of DIS Ignition's from street to racing units. Compufire Ignition System, Distributor-Less, 12 Volt. A distributorless ignition system according to claim 1 comprising the second transient voltage suppression means connected to the primary winding of the basic ignition coil means. Distributorless Ignition Systems (DIS) by Larry Carley copyright 2019 AA1Car.com Distributorless ignition systems (DIS) have been around for almost a decade now, and have eliminated much of the maintenance that used to be associated with the ignition system. A distributorless ignition system for internal combustion engines utilizing spark plugs comprising: basic ignition coil means having at least one primary winding, being energized from a direct current source, and at least one secondary winding for providing ignition current for said spark plugs, wherein both said windings are magnetically coupled; trigger ignition coil means adapted for causing electrical break-down across at least one of spark plugs, said trigger ignition coil means having a primary winding being energized from the direct current source, and a secondary winding with the first end thereof electrically connected to one of said spark plugs, and with the second end thereof electrically coupling this winding in series with the secondary winding of the basic ignition coil means, said primary and secondary windings in said trigger ignition coil means being magnetically coupled with each other; switching means connected to the primary windings of said basic ignition coil means and said trigger ignition coil means for switching current in the primary windings of the basic and trigger ignition coil means, and.