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1. (WO2018183684) CONTROL STRATEGY FOR AUTOMATIC SHUTDOWN OF ENGINE

Pub. No.:    WO/2018/183684    International Application No.:    PCT/US2018/025153
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Fri Mar 30 01:59:59 CEST 2018
IPC: B60L 1/00
F02D 41/00
F01N 11/00
Applicants: ELECTROJET TECHNOLOGIES, INC.
Inventors: SCHWULST, Kyle E. E.
BEEKER, Jesse
Title: CONTROL STRATEGY FOR AUTOMATIC SHUTDOWN OF ENGINE
Abstract:
A system is provided for automatically shutting down an engine of a portable or handheld device in response to the engine operating while in an enclosed space, such as a garage, shed, room, etc. to prevent dangers associated with carbon monoxide accumulating in the enclosed space. The engine has an oxygen sensor in its exhaust that is configured to detect the presence or absence of oxygen in the exhaust. Fuel can be removed from the air/fuel mixture (e.g., less fuel being injected) based on the output of the oxygen sensor to maintain a given desired air/fuel ratio. If the amount of fuel provided continues to decrease over time in order to maintain the air/fuel ratio, the controller can assume the engine is operating in confined spaces and can shut down the engine.