Boots – shoes – and leggings
Patent
1990-04-13
1992-02-11
Cangialosi, Salvatore
Boots, shoes, and leggings
123425, 73 35, F02P 514
Patent
active
050880446
ABSTRACT:
There is disclosed a knocking detection device for an automotive engine mounted on a vehicle and having a knock sensor for detecting analog vibration waveforms of the engine, and a crank position sensor for producing signals corresponding to a predetermined crank angle of the engine. The device comprises a first calculating circuit responsive to the signals from the crank position sensor for calculating an engine speed of the engine; a first setting circuit for setting a knocking detection term in one cycle of the engine corresponding to a period having the possibility of knocking; a conversion circuit for converting analog waveforms detected by the knock sensor into digital data every sampling period; a second calculating circuit for calculating a knocking level of the engine based on an average value of the digital data from the conversion circuit during the knocking detection term set by the first setting circuit; a second setting circuit responsive to the engine speed calculated by the first calculating circuit for setting a discrimination level; and a determination circuit for determining an occurrence of knocking by comparing the knocking level output from the second calculating circuit with the discrimination level set by the second setting circuit.
REFERENCES:
patent: 4271469 (1981-06-01), Kawai et al.
patent: 4675821 (1987-06-01), Aoki et al.
patent: 4699106 (1987-10-01), Haraguchi et al.
patent: 4750103 (1988-06-01), Abo et al.
patent: 4770143 (1988-09-01), Takahashi
patent: 4770144 (1988-09-01), Sakakibara et al.
patent: 4903210 (1990-02-01), Akasu
Cangialosi Salvatore
Fuji Jukogyo Kabushiki Kaisha
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