Ignitor Disconnection Control System and Method
AssigneeKoninklijke Philips Electronics N.V.
InventorsErnesto Mendoza, Kevin Pasquarelli
Life of this patent
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Abstract
An ignitor disconnection control system and method includes an ignitor having a semi-conductor switch (58) and capacitor (60) connected in series to form a junction (70) between the semi-conductor switch (58) and the capacitor (60), and a series circuit (68) connected between the junction (70) and common (32). The series circuit (68) has an inductor (62), a resistor (64), and a positive thermal change (PTC) resistor (66) connected in series, with the resistor (64) thermally coupled to the PTC resistor (66).
Claims26
An ignitor comprising:
- a semi-conductor switch 58 and capacitor 60 connected in series to form a junction 70 between the semi-conductor switch 58 and the capacitor 60;
- and
- a series circuit 68 connected between the junction 70 and common 32, the series circuit 68 having an inductor 62, a resistor 64, and a positive thermal change (PTC) resistor 66 connected in series;
- wherein the resistor 64 is thermally coupled to the PTC resistor 66.
A method for ignitor disconnection control comprising:
- providing an ignitor having a resistor and a positive thermal change (PTC) resistor;
- heating the resistor with ignitor current;
- monitoring temperature of the resistor with the PTC resistor;
- and
- disconnecting the ignitor when the temperature exceeds a trigger temperature of the PTC resistor.
A system for ignitor disconnection control comprising:
- an ignitor having a resistor;
- means for heating the resistor with ignitor current;
- means for monitoring temperature of the resistor;
- and
- means for disconnecting the ignitor when the temperature exceeds a trigger temperature.
Dependencies are inferred from the claim text.