Boots – shoes – and leggings
Patent
1979-03-28
1981-06-02
Wise, Edward J.
Boots, shoes, and leggings
364511, 731173, G06F 1520, G01M 1500
Patent
active
042714699
ABSTRACT:
A knocking detection method for internal combustion engines in which vibrations of the engine are detected by a vibration sensor and a peak value of the vibrations during a predetermined interval near the top dead center in each revolution of the engine is sampled. The peak value for each revolution is stored for a predetermined number of revolutions of the engine and an average value of the peak values is obtained. Then the ratio of each peak value to the average value is calculated, and the number of ratios whose magnitude exceeds a predetermined magnitude is expressed in terms of a rate or a percentage with respect to the total number of ratios, i.e., the predetermined number of revolutions of the engine. The presence or absence of the knocking is determined whether or not the rate or percentage is above a reference rate or percentage.
REFERENCES:
patent: 3972230 (1976-08-01), Hanson et al.
patent: 4009378 (1977-02-01), Sakamoto
patent: 4009699 (1977-03-01), Hetzler et al.
patent: 4044234 (1977-08-01), Frobenius et al.
patent: 4044236 (1977-08-01), Bianchi et al.
patent: 4055995 (1977-11-01), Armstrong et al.
patent: 4060714 (1977-11-01), Lappington et al.
Ito Toshimitsu
Iwase Kazuo
Kawai Hisasi
Sanada Masakatsu
Nippon Soken Inc.
Toyota Jidosha Kogyo Kabushiki Kaisha
Wise Edward J.
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