ELECTRONIC CONTROL UNIT(COMPUTER)

Signal Conditioning and ConversionSome input sensors produce a very low-voltage signal of less than 1 volt.. This signal also has an extremely low-current flow.. Therefore, this type

ELECTRONIC CONTROL UNIT

(COMPUTER)

Le Thanh Phuc Faculty of Automotive Engineering Email: thanhphucckd@gmail.com

University of Technical Education

Ho Chi Minh City

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A computer is an electronic device that

stores and processes data

It is also capable of controlling other devices

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The computer contains a crystal oscillator or clock circuit that delivers a constant time

pulse

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Signal Conditioning and Conversion

Some input sensors produce a very

low-voltage signal of less than 1 volt

This signal also has an extremely

low-current flow

Therefore, this type of signal must be

amplified, or increased, before it is sent to

the microprocessor

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Signal Conditioning and Conversion

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Signal Conditioning and Conversion

The digital computer cannot accept analog signals from the sensors and requires an

input interface to convert the analog signal to digital

The analog to digital (A/D) converter

continually scans the analog input signals at regular intervals

For example, if the A/D converter scans the TPS signal and finds the signal at 5 volts, the A/D converter assigns a numeric value to this specific voltage

Then the A/D converter changes this

Signal Conditioning and Conversion

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The microprocessor (μP) is the brain of

the computer

The μP brings information into and out of the computer’s memory

The registers used include the

accumulator, the data counter, the program counter, and the instruction register

The control unit implements the

instructions located in the instruction

register

The arithmetic logic unit (ALU) performs

the arithmetic and logic functions

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