Briefly explain automotive ignition system, Electrical Engineering

Assignment Help:

Q. Briefly explain Automotive Ignition System?

Ignition systems in automobiles have been designed as a straightforward application of electrical transients. Figure shows a simplified ignition circuit for an internal-combustion engine. The primary inductance, current-limiting resistance, and capacitance forman underdamped series RLC circuit. Thus, when the points open, an oscillatory current flows through the primary, thereby inducing the required voltage in the secondary. The points form a switch, which opens and closes as the engine rotates, exactly at the instantwhen an ignition spark is needed by one of the cylinders. During the period when the points are closed, current builds up rather slowly in the primary winding of the coil, which consists of a pair of mutually coupled inductors, as shown in Figure. The current is interrupted rapidly when the points open. The resulting large rate of change of current induces a large voltage across the coil secondary, which is connected to the appropriate spark plug by the distributor. The resistance limits the current in case the engine stops with the points closed. Since the voltage across a capacitance cannot change instantaneously, the capacitor prevents the voltage

 across the points fromrising too rapidly when the points open. Otherwise arcingmay occur across the points, which in turn may get burned and pitted.

2168_Automotive Ignition System.png


Related Discussions:- Briefly explain automotive ignition system

Sketch the frequency response, Q. For the circuits shown in Figure, sketch ...

Q. For the circuits shown in Figure, sketch the frequency response (magnitude and phase) of ¯V out / ¯V in .

Compute the motor speed, Consider the 220-V, 1800-r/min dc motor, controlle...

Consider the 220-V, 1800-r/min dc motor, controlled by a three-phase fully controlled rectifier from a 60-Hz ac source. The armature-circuit resistance and inductance are 1.5  and

Dc machines, explain dynamically induced emf and derive expression for it

explain dynamically induced emf and derive expression for it

Stax store accumulator indirect instruction , STAX Store  Accumulator  In...

STAX Store  Accumulator  Indirect Instruction This  instruction is used to  copy data from accumulator to the memory  location pointed by register pair ( only  BC or DE pair).

Accidents, what are accidents in an organisation

what are accidents in an organisation

EMF, what is induced EMF & what is statically EMF explain in details.

what is induced EMF & what is statically EMF explain in details.

Obtain the complete solution for the current, For the circuit of Figure, ob...

For the circuit of Figure, obtain the complete solution for the current i L (t) through the 5-H inductor and the voltage v x (t) across the 6- resistor.

Circuit of a common drain fet amplifier and explain, Q. Draw the circuit of...

Q. Draw the circuit of a common drain FET amplifier and explain. FET amplifier circuit The weak signal is applied between gate and source and amplified output is obtained

Var compensators employing flexible ac transmission system, Var Compensator...

Var Compensators Employing Flexible AC Transmission System Devices These are a new generation of VAr compensators which employ solid-state devices (thyristors) for the generati

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd