Internal-combustion engines – Spark ignition timing control – Electronic control
Reexamination Certificate
2007-01-29
2009-08-25
Cronin, Stephen K (Department: 3747)
Internal-combustion engines
Spark ignition timing control
Electronic control
C123S406370, C123S406390, C123S406380
Reexamination Certificate
active
07578282
ABSTRACT:
In a knock sensor signal processing apparatus, a first apparatus which receives an engine knock sensor signal performs A/D conversions of the signal with a predetermined period and transmits successive pluralities of A/D values in parallel, by serial data communication, to a second apparatus in response to respective commands received from the second apparatus. The number of communication lines provided for transmitting the A/D values is made greater than those for transmitting commands from the second apparatus to the first apparatus, so that a high A/D conversion frequency together with low data rate of transmitting the A/D values can be achieved, thereby reducing communication-generated noise.
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Coleman Keith
Cronin Stephen K
Denso Corporation
Nixon & Vanderhye PC
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