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Which of the following type of advancement uses the ECU?

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in Automotive Engine Design by (137k points)
Which of the following type of advancement uses the ECU?

(a) Vacuum advance

(b) Centrifugal advance

(c) Complete vacuum control

(d) Computerized advance control

I have been asked this question in an international level competition.

I want to ask this question from Ignition Advance topic in section Conventional Ignition System of Automotive Engine Design

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Correct option is (d) Computerized advance control

To explain: The computerized advance control uses a computer with memory, a timing map, which contains spark advance values for all combustion of speed, load, and other conditions. Based upon the signals received from various sensors, the ECU sends the signal to the ignition coil at the precise moment indicated in the timing map.

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