Matrix injector driver circuit
First Claim
Patent Images
1. A fuel injector control circuit comprising:
- a plurality of coils, including a first coil and a second coil;
a first gate connecting a first end of each of the first and second coils to a power supply;
a second gate selectively connecting a second end of said first coil to ground; and
a third gate selectively connecting a second end of said second coil to ground.
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Abstract
A fuel injector control circuit reduces the number of gates required by arranging high side and low side gates in a matrix. Each coil is selectively activated by activating a unique pair of a high side gate and a low side gate, thus reducing the total number of gates required.
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Citations
13 Claims
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1. A fuel injector control circuit comprising:
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a plurality of coils, including a first coil and a second coil;
a first gate connecting a first end of each of the first and second coils to a power supply;
a second gate selectively connecting a second end of said first coil to ground; and
a third gate selectively connecting a second end of said second coil to ground. - View Dependent Claims (2, 3, 4)
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5. A fuel injector control circuit comprising:
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a plurality of open coils;
a plurality of close coils, each associated with one of said open coils for controlling a fuel injector;
a plurality of high side gates each selectively connecting at least two of said plurality of coils to a power supply; and
a plurality of low side gates, each selectively connecting at least two of said coils to ground. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method for controlling a plurality of fuel injectors including the steps of:
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a) associating each of a plurality of open coils with one of a plurality of high side gates and one of a plurality of low side gates, b) associating each of a plurality of close coils with one of the plurality of high side gates and one of the plurality of low side gates c) activating each of said coils based upon activation of a unique pair of one of said high side gates and one of said low side gates. - View Dependent Claims (12, 13)
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Specification