Ignition interrupt system with stall interval
AssigneeBrunswick Corporation
InventorJames A. Davis
Life of this patent
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Abstract
A spark ignition interrupt system (24) is provided for a marine propulsion internal combustion engine (6) to reduce engine speed and facilitate shifting of a marine propulsion transmission (13). Spark ignition is terminated in response to a given shift condition until engine speed drops below a given cut-in speed or until completion of the shifting, whichever occurs first. A stall interval is also started in response to the given shift condition. The engine is stalled upon completion of the stall interval if the shifting is not complete, even if engine speed has dropped below the given cut-in speed.
Claims13
A method for interrupting spark ignition of a marine propulsion internal combustion engine to reduce engine speed and facilitate shifting of a marine propulsion transmission, comprising:
- sensing engine speed;
- sensing a given shift condition indicating initiation of a given transmission shifting operation, and sensing completion of said shifting;
- terminating said spark ignition in response to said given shift condition until said engine speed drops below a given cut-in speed or until said completion of said shifting, whichever occurs first;
- starting a stall interval in response to said given shift condition;
- stalling said engine upon completion of said stall interval if said shifting is not complete, even if said engine speed has dropped below said given cut-in speed.
A method for interrupting spark ignition of a marine propulsion internal combustion engine to reduce engine speed and facilitate shifting of a marine propulsion transmission, including the steps of sensing engine speed, sensing a given shift condition indicating initiation of a given transmission shifting operation, and sensing completion of said shifting, and comprising the following steps in combination:
- (a) ascertaining whether said shifting is complete,
- and if so, repeating step (a),
- and if not, starting a stall interval, terminating said spark ignition, and proceeding to step (b);
- (b) ascertaining whether said stall interval has elapsed,
- and if so, stalling said engine,
- and if not, proceeding to step (c);
- (c) ascertaining whether said shifting is complete,
- and if so, restoring said spark ignition and proceeding to step (a),
- and if not, proceeding to step (d);
- (d) ascertaining whether said engine speed is below a given cut-in speed,
- and if not, proceeding to step (b),
- and if so, restoring said spark ignition and proceeding to step (e);
- (e) ascertaining whether said stall interval has elapsed,
- and if so, terminating said spark ignition and stalling said engine,
- and if not, proceeding to step (f);
- (f) ascertaining whether said shifting is complete,
- and if so, proceeding to step (a),
- and if not, proceeding to step (g);
- (g) ascertaining whether said engine speed is above a given cut-out speed,
- and if so, terminating said spark ignition and proceeding to step (b),
- and if not, proceeding to step (e).
A method for interrupting spark ignition of a marine propulsion internal combustion engine to reduce engine speed and facilitate shifting of a marine propulsion transmission, including the steps of sensing engine speed, sensing a given shift condition indicating initiation of a given transmission shifting operation, and sensing completion of said shifting, and comprising the following steps in combination:
- (a) ascertaining whether said shifting is complete,
- and if so, repeating step (a),
- and if not, starting a stall interval and proceeding to step (b);
- (b) ascertaining whether said stall interval has elapsed,
- and if so, terminating said spark ignition and stalling said engine,
- and if not, proceeding to step (c);
- (c) ascertaining whether said shifting is complete,
- and if so, providing said spark ignition and proceeding to step (a),
- and if not, proceeding to step (d);
- (d) ascertaining whether said engine speed is above a given speed,
- and if not, providing said spark ignition and proceeding to step (b),
- and if so, terminating said spark ignition and proceeding to step (b).
A method for interrupting spark ignition of a marine propulsion internal combustion engine to reduce engine speed and facilitate shifting of a marine propulsion transmission, including the steps of sensing said engine speed, sensing a given shift condition indicating initiation of a given transmission shifting operation, and sensing completion of said shifting, and comprising the following steps in combination:
- (a) ascertaining whether said shifting is complete,
- and if so, repeating step (a),
- and if not, starting a stall interval and proceeding to step (b);
- (b) ascertaining whether said stall interval has elapsed,
- and if so, terminating said spark ignition and stalling said engine,
- and if not, proceeding to step (c);
- (c) ascertaining whether said shifting is complete,
- and if so, providing said spark ignition and proceeding to step (a),
- and if not, proceeding to step (d);
- (d) ascertaining whether said engine speed is below a given cut-in speed,
- and if so, providing said spark ignition and proceeding to step (b),
- and if not, proceeding to step (e);
- (e) ascertaining whether said engine speed is above a given cut-out speed,
- and if so, terminating said spark ignition and proceeding to step (b),
- and if not, proceeding to step (b).
A system for spark ignition interruption of a marine propulsion internal combustion engine to reduce engine speed and facilitate shifting a marine propulsion transmission, comprising means sensing engine speed means sensing a given shift condition indicating initiation of a given transmission shifting operation and sensing completion of said shifting, and means terminating said spark ignition in response to said given shift condition until said engine speed drops below a given cut-in speed or until said completion of said shifting, whichever occurs first, and starting a stall interval in response to said given shift condition, and stalling said engine upon completion of said stall interval if said shifting is not complete, even if said engine speed has dropped below said given cut-in speed.
Dependencies are inferred from the claim text.