ENGINE CONTROL UNIT

The engine control unit addresses noise interference and CPU load by associating sensor data with engine rotation angles, ensuring precise fuel injection timing through direct memory access data storage.

DE102021107328B4Active Publication Date: 2026-05-28DENSO CORP
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Patent Information

Application Number
DE102021107328
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Priority Date
2020-04-20
Filing Date
2021-03-24
Publication Date
2026-05-28
Estimated Expiration
2041-03-24

AI Technical Summary

Technical Problem

Existing engine control units face challenges in accurately determining fuel injection times due to noise interference in sensor signals and increased processing load on the microcomputer's CPU from frequent A/D conversions.

Method used

An engine control unit that associates sensor detection values with engine rotation angles using an angle counter and A/D converter, storing data in buffers via direct memory access to avoid CPU processing load and enable accurate fuel injection timing.

Benefits of technology

Accurately determines fuel injection times by correlating sensor data with engine rotation angles, reducing CPU processing load and enhancing fuel injection precision.

✦ Generated by Eureka AI based on patent content.

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Abstract

Engine control unit, which features: an angle counter (40) which outputs a count value indicating a rotation angle of an internal combustion engine; an A / D conversion unit (23) containing an A / D converter which converts a physical quantity to A / D at a given period, which is detected by a sensor (12) which detects the physical quantity used to control the internal combustion engine; a first transmission unit (46) that transfers the physical quantity converted by the A / D converter to a first buffer (48) using a direct memory access method; and a second transmission unit (47) which, in response to a trigger signal generated at a given time when the A / D converter performs the A / D conversion with the given period, obtains the count value output by the angle counter and transfers the obtained count value to a second buffer (49) by means of a direct memory access method, wherein The physical quantity stored in the first buffer and the count value stored in the second buffer are assigned to each other, so that the rotation angle of the combustion engine can be obtained at a time when the physical quantity is detected.
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Citation Information

Patent Citations

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    JP1980084859A

  • A / d conversion processing apparatus

    JP2011061512A

  • Control device

    JP2016079840A

  • Fuel injection control device

    JP2019027340A

  • JP0000S5584859A