Auxiliary ignition system and method for aircraft engines
AssigneeASAP - Aircraft Service and Parts, Inc.
InventorJohn Daino
Life of this patent
Estimating the term…
Abstract
An auxiliary ignition system comprising a first magneto having a normal operating mode and a start-up mode, and a second magneto having a normal operating mode and a start-up mode. A primary starter switch is operably wired to the first and second magnetos. Engagement of the primary starter switch activates the second magneto start-up mode and the first magneto start-up mode. Auxiliary ignition switches are operably connected to the primary starter switch wiring such that engagement of the auxiliary ignition switches after engagement of the starter switch causes the first and second magnetos to initiate engine ignition in their respective normal operating mode.
Claims12
An auxiliary ignition system, comprising:
- a first magneto having a normal operating mode and a start-up mode;
- a second magneto having a normal operating mode and a start-up mode;
- a start switch operably wired to said first and second magnetos, engagement of said start switch activates said second magneto start-up mode and activates said first magneto start-up mode;
- and auxiliary ignition switches operably connected to said start switch, engagement of said auxiliary ignition switches and said start switch causes said first and second magnetos to initiate engine ignition in their respective normal operating mode.
An auxiliary ignition system for aircraft, comprising:
- an engine including spark plugs, a first magneto and a second magneto, said magnetos operably connected to said spark plugs to provide current impulses to said spark plugs for engine ignition and operation upon rotation of said magnetos;
- said magnetos having a start-up condition and an operating condition, said first magneto including starting points and running points wired in series and operable during said start-up condition to provide said current impulses in attempting engine ignition, only said running points of said first magneto are operable during said operating condition to provide said current impulses, said second magneto including running points to provide said current impulses during said operating condition, said second magneto start-up condition disengages said second magneto to prevent said second magneto from providing said current impulses;
- a starter motor including a start switch, said starter motor being operably connected to said engine whereby engagement of said starter motor with said start switch rotates said magnetos;
- said start switch includes a plurality of contacts whereby engagement of said plurality of contacts by said start switch places said magnetos in said start-up condition, and disengagement of said plurality of contacts by said start switch disengages said starter motor and said magnetos start-up condition;
- a starter vibrator operably connected to said start switch and said first magneto, whereby engagement of said start switch engages said starter vibrator to provide an enhanced current impulse to said spark plugs via said first magneto;
- and
- first and second auxiliary ignition switches operably connected to said running points of said first and second magnetos, respectively, and located between said magnetos and said plurality of contacts, where engagement of said auxiliary ignition switches after engagement of said plurality of contacts by said start switch disengages said starting points of said first magneto and engages said running points of said second magnetos to provide current impulses by said first and second magneto running points to said spark plugs for engine ignition.
A method of starting a two magneto engine operating in a normal starting condition in which a starting circuit disables the second of said two magnetos, and said first magneto is energized with a supplemental energy source comprising the steps of:
- disabling said starting circuit by disabling the portion of said starting circuit which disables said second magneto to cause said second magneto to fire in an operating condition during starting, and by simultaneously disabling the portion of said starting circuit which energizes said first magneto with said supplemental energy source to cause said first magneto to fire in an operating condition during starting.
Dependencies are inferred from the claim text.