The book includes how electronic control units function in the whole electronic system of the car. As a result, sophisticated electronic ignition systems can be both more fuel efficient, and produce better performance over their counterparts. Step 1 turn the ignition on engine off and, using either a voltmeter or a test light, test for battery voltage available at the positive. Pdf electronic ignition of four stroke single cylinder engine. The primary winding on the outside and the longer secondary winding on the inside. An2689 electrical hazards in the automotive environment doc id 14310 rev 3 742 1. Major components used in automobile ignition systems are. What is the difference between conventional, electronic and. Capitulo 2 automotive electrical circuits and wiring. Th e purpose of various electronic accessory systems. This type of ignition is used on many older nonautomotive motors look at a virago. Modern automotive ignition systems are referred to as coilonplug cop, which in addition to improving spark timing, uses redesigned ignition coils that pack a much bigger wallop and generate a hotter spark. Chapter 8 automotive electrical circuits and wiring. The switch can be a conventional set of points or a switching transistor, as used in most modern ignition systems.
Ignition system requirements and their application to the. Until the 80s the electronic ignition system allowed automotive engineers to re. Download it once and read it on your kindle device, pc, phones or tablets. Electronic ignition system transistor assisted contact systemtac system 23k views. Electronic ignition troubleshooting procedure when troubleshooting any electronic ignition system for no spark, follow these steps to help pinpoint the exact cause of the problem. To overcome the above drawbacks, in the modern automobiles, electronic ignition systems are used. Overview the electrical systems on equipment used by the navy are designed to perform a variety of functions.
Introduction to automotive ignition systems introduction as the cost of gasoline rises and environmental concerns about vehicle exhaust attracts more and more attention, the auto industry is accelerating research on development of new powertrain systems with less fuel consumption, higher power density, and enhanced robustness. The entire secondary circuit is the same as in a conventional ignition system. Install coils pn 10472401d onto the ignition module using the four coil screws that are provided. In non ews systems the ignition switch provided power directly to the starter solenoid or a starter relay. Battery coil primary and secondary circuits distributor rotor, breaker points, capacitor spark plugs front back with the battery connected and the distributor breaker points closed, current flows through the primary circuit of the coil, setting up a strong magnetic field. With electronic ignition systems, individual cylinders citation needed can have their own individual timing so that timing can be as aggressive as possible per cylinder without fuel detonation. If you are not familiar with the way an ignition system works in general, i strongly recommend that you first read the previous section the mechanical ignition system. Free books of automotive mechanics motors, electronic systems, electrical, mechanical, hydraulic and tires and free. Many accessories do not operate with the ignition turned off. The automotive electrical system contains five electrical circuits.
After a brief introduction to the mechanical parts of the car, the electronic and microprocessor systems are discussed. This request is handled differently depending on the year of the vehicle and particular systems the vehicle is fitted with. Jul 27, 2016 021 automotive electrical electronic systems charging, starting and lighting systems duration. Unit 4 ignition systems ignition systems structure 4. Then, engineers designed fully electronic automotive ignition systems, the first of which was a distributorless style. Electronic ignition overview automotive coil also called an inductor an iron core is wrapped with 2 long coils of wire.
Not legal on pollutioncontrolled vehicles or vehicles registered for highway use. If the reading is zero, there is no power to the device. The main job of the ignition system is to supply electricity to the spark plugs so that they can ignite the fuelair mixture in the cylinder. Supplies electric current to operate all the electrical and electronic systems in the vehicle. In order to supply the spark of high voltage and occurring at the proper time, several ignition systems were developed over the years. It covers from older mechanical to the most modern electronic ignition system, such as dis, wastespark, cop, csi on gmsaab and most ignition systems separated by engine type. Electronic ignition systems are similar to mechanical ignition systems except that they use electronic timing devices instead of ignition points. Ignition coil 1 low voltage 4 high voltage 4a from ignition coil i, terminal 4 4b from ignition coil ii, terminal 4 15 switched positive after battery ignitionswitch output 15a output at the series resistor to the ignition coil and to the starter glowplug and starter switch 17 start 19 preglow battery 30 line from battery positive terminal.
In addition, the section of the primary circuit from the battery to the battery terminal at the coil is the same as in a conventional ignition system. Electronic ignition systems use solid state devices such as transistors and capacitors. An ignition magneto, or high tension magneto, is a magneto that provides current for the ignition system of a sparkignition engine, such as a petrol engine. An electronic ignition is a modification on the conventional system, and youll find these in widespread use today, although distributorless systems are now becoming more common. Ignition coil 1 low voltage 4 high voltage 4a from ignition coil i, terminal 4 4b from ignition coil ii, terminal 4 15 switched positive after battery ignition switch output 15a output at the series resistor to the ignition coil and to the starter glowplug and starter switch 17 start 19 preglow battery 30 line from battery positive terminal. Vehicle manufacturers specify initial or base ignition timing. Contains either mechanical contact points or an electronic switching circuit. Glow plug ignition system is the oldest of all and is obsolete because of its many limitations glow plug ignition system has a problem of causing uncontrolled combustion due to the use of electrode as a ignition source, which is solved later after the introduction of magneto ignition system in which electrodes are replaced by spark plug. Most of the vehicles today incorporate electronic ignition system in its engine. It improves fuel economy and makes starting easier. Unit 3 automobile electrical automobile electrical.
In some electronic ignition systems the control module is prompted by an. Automotive ignition systems explained general motors. Automotive electronic systems deals with the technological principles and practices used in modern electronic automotive systems. Jan 25, 2019 in order to supply the spark of high voltage and occurring at the proper time, several ignition systems were developed over the years. To check for a blown fuse, first locate the fuse holder. Pertronix performance products manufacturing quality ignition and exhaust products for over 40 years. Automotive ignition system western washington university. The engine spins a magnet inside a coil, or, in the earlier designs, a coil inside a fixed magnet, and.
Converting to an electronic breakerless ignition system is a simple option for owners of old tractors with points and condensers. Spread a layer of the silicon grease from the supplied packet over the metal plate on the bottom of the ignition module pn 015568 to provide for better heat transfer from the module to the mount. Use features like bookmarks, note taking and highlighting while reading automotive ignition systems explained general motors. Rolling hills publishing 300 eagle flight ozark, mo 65721. An8208 introduction to automotive ignition systems.
This electronic ignition system has its best performance at all varying conditions and speed, unlike electromechanical systems. Electronic ignition circuit singleended input, high energy ignition control circuit used in 12 v battery systems. Manufactures of electronic ignition systems havt advertised. Like conventional ignition systems, electronic systems have two circuits. Toyota 2e electronic distributor ignition coil wire assembly pick up coil duration. It is in 1911 that he developed the first electrical ignition system or at least the design concepts. Aug 18, 2016 magneto ignition system the simplest form of spark ignition is that using a magneto. Introduction to automotive electrical and electronic systems. Definition, parts, working, applications, advantages, and disadvantages with pdf.
Kettering ignition systems used on the majority of automotive engines can. What is the difference between conventional, electronic. Uniti automobile electrical and electronics electrical. Three types of vehicle ignition systems and how they work. This laboratory exercise 1 explores the physics of automotive ignition systems used on vehicles for about half a century until the 1980s and, 2 introduces more modern transistorized systems. It comprises an ignition coil which has its primary winding connected to the battery supply with a switch at the negative side.
The coilonplug cop vehicle ignition system incorporates all the electronic controls found in a dis car ignition system, but instead of two cylinders sharing a single coil, each cop coil services just one cylinder, and has twice as much time to develop maximum magnetic field. Leecautomotive systems basic componentsto a ignitionsystem ignition coil changes battery voltage to high ignition voltage 30,000 volts andgreater. In an electronic system, you still have a distributor, but the points have been replaced with a pickup coil, and theres an electronic ignition. An ignition magneto, or high tension magneto, is a magneto that provides current for the ignition system of a spark ignition engine, such as a petrol engine. Table of contents starting systems bmw 7 series e38. This is usually a block about the size of a pack of cigarettes with a plastic cover located. Based upon the available data, it is reasonable to assume that the introduction of the electronic ignition system using igbts has produced fuel savings of at least 10%. As a result, some cop car ignition systems generate as much as 40,000 to. January20, 2010 10 leecautomotive systems ignition distributor distributes ignition voltage to the spark plug.
An electronic control module separate from the distributor guides the flow of current in the ignition coil primary circuit. Nov 17, 2017 but all these systems have their own limitations that are. The electro ignition system consists of transistors, capacitors, diodes and resistors. Magneto ignition system the simplest form of spark ignition is that using a magneto. Only the automotive industry calls it a condenser and no, i have no idea why. Automotive ignition systems explained general motors kindle edition by concepcion, mandy. This book is good for both, a reference and a repair strategy book. There are also 2 other pages dealing with basic electronic theory and batteries. The ignition system coil is a stepup transformer the takes about 12 volts and steps it up from about 6,000 volts 6kv to as much as 100,000volts 100kv depending on the system.