Gated knock detector for internal-combustion engines

Details Gated knock detector for internal-combustion engines Gated knock detector for internal-combustion engines

1986-01-08

1987-05-26

Wolfe, Jr., Willis R.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123425, 73 35, G01L 2322, F02M 700, F02P 504

Patent

active

046676376

ABSTRACT:
A system for use with an internal combustion engine which reduces, or eliminates, engine knock and attendant engine damage. An audio transducer is placed on an engine cylinder to convert audio signals occurring within the combustion chamber into an electrical signal. This signal is sampled and filtered and the amplitudes of two time-sequenced segments are compared. One of those segments is timed for an interval during which detonation, if any, is likely to occur, and the other of these segments is timed for an interval during which no detonation is likely to occur. When the amplitude of the sample from the segment of likely detonation exceeds the amplitude of the sample from the segment of unlikely detonation, by a predetermined amount, extra fuel is momentarily added to the combustion chamber to slow down the rate of combustion and cool the walls of the combustion chamber.

REFERENCES:
patent: 4243009 (1981-01-01), Staerzl
patent: 4440129 (1984-04-01), Iwata
patent: 4449501 (1984-05-01), Greeves
patent: 4535739 (1985-08-01), Kudo et al.
patent: 4552111 (1985-11-01), Tahara
patent: 4565087 (1986-01-01), Damson et al.
patent: 4593553 (1986-06-01), Bonitz et al.

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