Measuring and testing – Engine detonation – Specific type of detonation sensor
Patent
1997-07-02
1999-05-18
Dombroske, George
Measuring and testing
Engine detonation
Specific type of detonation sensor
701111, G01M15/00
Patent
active
059051930
ABSTRACT:
The invention provides a preignition detection device that is capable of detecting a preignition condition (PI) in an incipient stage. Engine vibration is detected by a vibration sensor 113 and read into a controller 12. When the length of a period during which abnormal vibration of a magnitude greater than a predetermined level occurs in succession has exceeded a predetermined length of period, or when the frequency of occurrence of abnormal vibration during a predetermined period is greater than a predetermined value and the cumulative sum of the frequencies of occurrence of abnormal vibration has exceeded a predetermined value, then it is determined that preignition has occurred. Here, a determination value, based on which the occurrence of preignition is determined, can be varied to prevent erroneous decisions and to improve responsiveness.
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Hashizume Katsushi
Mogi Kazuhisa
Dombroske George
McCall Eric S.
Toyota Jidosha & Kabushiki Kaisha
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