Components of traditional ignition systems and electronically controlled ignition systems

The electronically controlled ignition system is mainly composed of igniter, ignition coil, spark plug, knock sensor and high voltage line. The high voltage line on the ignition coil is directly connected to the spark plug, and the system is no longer equipped with a distributor. When the engine is working, the computer detects the engine speed according to the crankshaft position sensor, camshaft position sensor, throttle position sensor and water temperature sensor.

Corner,

Working condition signals such as load and temperature,

Calculate that ignition time and energization time of the primary coil, and sending a calculation result instruction to the ignite,

The igniter directly controls the on-off of the primary current of the ignition coil. The high-voltage electricity generated by the ignition coil is directly sent to the spark plugs of each cylinder to ignite the combustible mixture, so it is called direct ignition system. Because there is no distributor in the system, it is also called distributor-free ignition system.

Composition of traditional ignition system

Power supply, ignition coil, distributor, ignition switch, spark plug, additional resistance short-circuit device (picture shows)

(2)

The role of each component

Do you need these parts for the ignition system? What if one is missing?

(Asking questions leads to the work of each part.

Use)

(3)

Working process of traditional ignition system

a

By demonstrating the ignition process

glitter

Animation, concentrate students' attention and improve students' interest.

b

After watching the animation, let the students describe the working process of ignition in their own words (ask questions)

c

Ask the students to complement and perfect the description of the ignition process.

d

, teacher comments

three

Summarize the new lessons and consolidate the promotion.

The use of multimedia video enables students to grasp this part of the content as a whole and understand it.

four

Assign homework and consolidate it after class.

According to the pictures in the textbook

four

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2

The working process of traditional ignition system is briefly described.