FUEL INJECTION CIRCUIT WITH SELECTABLE PEAK INJECTION CURRENTS
First Claim
Patent Images
1. A method for charging a fuel injection coil including the steps of:
- charging an injector coil at a first level for a first period of time; and
charging the injection coil at a second level lower than the first level for a second period of time subsequent to the first period of time.
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Abstract
A charging circuit for a fuel injection coil enables the controller to selectively add a pulse of increased amplitude to the beginning of an injection current pulse. Optionally, the controller can also select one of a plurality of amplitudes for the pulse and control the duration of the pulse.
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Citations
20 Claims
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1. A method for charging a fuel injection coil including the steps of:
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charging an injector coil at a first level for a first period of time; and charging the injection coil at a second level lower than the first level for a second period of time subsequent to the first period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A charging circuit for a fuel injector coil comprising:
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a driver for selectively charging the coil based upon a reference value; and a timer for altering the reference value for a first period of time, such that the driver charges the coil at a higher level during the first period of time. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A charging circuit for a fuel injector coil comprising:
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a driver for selectively charging the coil at a normal level or at a higher level; and a timer generating a pulse for a first period of time, the driver charging the coil at the higher level based upon the pulse and returning to the normal level after the pulse. - View Dependent Claims (19, 20)
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Specification