Engine kill-switch control circuit and method of operating...

Details Engine kill-switch control circuit and method of operating... Engine kill-switch control circuit and method of operating...

2006-11-14

2006-11-14

Dolinar, Andrew M. (Department: 3747)

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

With indicator or control of power plant

C123S1980DC

Reexamination Certificate

active

07136742

ABSTRACT:
A kill-switch control circuit for use with a light-duty combustion engine determines whether to execute a controlled shut down method or an immediate shut down method in response to kill-switch activation. The selection of a shut down method is made, at least in part, by using engine speed readings and by counting engine revolutions. The controlled shut down method utilizes ignition timing delay and/or spark ratio techniques to quickly bring the engine to a stop, yet does so in a controlled manner that avoids backfiring and other undesirable effects. Conversely, the immediate shut down method abruptly stops sending a current to the spark plug.

REFERENCES:
patent: 4111175 (1978-09-01), Nakamura et al.
patent: 4574752 (1986-03-01), Reichert, Jr. et al.
patent: 5048503 (1991-09-01), Suzuki et al.
patent: 60-233371 (1985-11-01), None
patent: 6-307264 (1994-11-01), None

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