Title:
ENGINE ROTATIONAL SPEED VARIATION AMOUNT DETECTING DEVICE AND ENGINE CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/003279
Kind Code:
A1
Abstract:
Provided is a rotational speed variation amount detecting device for a multi-cylinder four-cycle engine, which: detects a specific part of an alternating current voltage waveform output by a power generation coil provided for an ignition unit corresponding to each cylinder in the engine, and generates one rotation signal corresponding to each cylinder for each rotation of a crankshaft; detects, as a rotation signal generation interval of each cylinder each time a new rotation signal corresponding to each cylinder is generated, an elapsed time from the generation of the rotation signal corresponding to each cylinder in the previous cycle until the generation of the rotation signal in the current cycle; calculates, as a rotation signal generation interval variation amount each time the rotation signal generation interval for each cylinder is detected, a difference between the newly detected rotation signal generation interval for each cylinder and the rotation signal generation interval detected in the previous cycle for the same cylinder; and detects an amount of variation in the rotational speed of the engine on the basis of the rotation signal generation interval variation amount, thereby detecting the amount of variation in the rotational speed of the engine a plurality of times during one rotation of the crankshaft.
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Inventors:
UEMURA KIYOSHI (JP)
Application Number:
PCT/JP2017/023424
Publication Date:
January 03, 2019
Filing Date:
June 26, 2017
Export Citation:
Assignee:
MAHLE ELECTRIC DRIVES JAPAN CORP (JP)
International Classes:
F02D45/00
Foreign References:
| JP2003074406A | 2003-03-12 | |||
| JPS58200062A | 1983-11-21 | |||
| JP2017031933A | 2017-02-09 | |||
| JPH02286849A | 1990-11-27 | |||
| JP2014152752A | 2014-08-25 | |||
| JP2014152752A | 2014-08-25 |
Attorney, Agent or Firm:
KIKUCHI, Shinichi et al. (JP)
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