Internal-combustion engines – Engine speed regulator – Open loop condition responsive
Reexamination Certificate
2007-04-03
2008-11-11
Wolfe, Jr., Willis R. (Department: 3747)
Internal-combustion engines
Engine speed regulator
Open loop condition responsive
C123S406450, C123S406570
Reexamination Certificate
active
07448358
ABSTRACT:
A control system for a low cost, light duty combustion engine, where the control system generally utilizes an engine speed input signal and independent operating sequences to determine a desired ignition timing. There are several independent operating sequences, each one of which is designed to optimally control the engine under certain conditions. These operating sequences include a Cranking sequence, a Warm Up sequence, a Normal Mode sequence, an Acceleration sequence, a Come Down sequence, a Recovery Bump sequence, and a Part Throttle sequence. During idling conditions, the Normal Mode sequence uses rapid changes in the ignition timing to maintain the engine speed in a small, idle engine speed range. By utilizing these operational sequences, the control system improves the performance of a low cost, light duty engine across a wide array of conditions.
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Andersson Martin N.
Born Kevin P.
Burns Michael P.
Pattullo George M.
Hoang Johnny H.
Reising Ethington Barnes Kisselle P.C.
Walbro Engine Management , L.L.C.
Wolfe, Jr. Willis R.
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