Internal combustion engine control device

• Main Author: FUKUI; WATARU
• Format: Patent
• Language: English
• Published: 20.06.1995
• Edition: 6
• Subjects: BLASTING; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TOTRANSPORTATION; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; IGNITION, OTHER THAN COMPRESSION IGNITION, FORINTERNAL-COMBUSTION ENGINES; LIGHTING; MECHANICAL ENGINEERING; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES; WEAPONS

An internal combustion engine control device improving the combustion state without increasing the cost. Such a control device comprises: an angle detection section for generating a reference position signal indicating a predetermined crank angle position of a cylinder of an internal combustion engine; a drive state detection section for detecting a drive state of the internal combustion engine; an ion current detection section for detecting an ion current in the cylinder so as to produce an ion current value; an ion current determining section for producing a peak value of the ion current value and a pulse width of the ion current value which is the same or greater than a predetermined level so as to output the peak value and the pulse width as first and second determined values, respectively; and a control parameter setting section for setting a control parameter of the internal combustion engine on the basis of the reference position signal and the drive state, the control parameter setting section varying the control parameter so that the product of the first and second determined values is maximized. Thus, the combustion state in the internal combustion engine is accurately determined, thereby enabling the feedback control of the control parameter.