Fuel injection split engine
First Claim
1. A method of selectively activating fuel injectors in an engine having multiple cylinders and an electronic circuit for sensing a state of an input, comprising:
- operating said engine in a non-split engine mode in response to said electronic circuit sensing a first state of said input;
operating said engine in a half-power split engine mode in response to said electronic circuit sensing a second state of said input by sequentially activating a first half of said fuel injectors during a first time period, and activating a second half of said fuel injectors during a second time period; and
operating said engine in a three-quarters power split engine mode in response to said electronic circuit sensing a third state of said input by sequentially activating a first subset of said fuel injectors during a third time period, activating all of said injectors during a fourth time period, and activating a second subset of said fuel injectors during a fifth time period.
1 Assignment
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Accused Products
Abstract
An automobile includes an engine and an engine controller. The engine includes multiple cylinders. Each cylinder has a fuel injector connected to the engine controller. The engine controller has a first output which activates a first fraction of the fuel injectors. In addition, the engine controller has a second output which activates a second fraction of the fuel injectors. The engine controller also has an input which provides a timing signal synchronous with rotation of the engine and a sequencing circuit responsive to the timing signal. The sequencing circuit periodically alternates between the first and second output in synchronization with the rotation of the engine.
86 Citations
8 Claims
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1. A method of selectively activating fuel injectors in an engine having multiple cylinders and an electronic circuit for sensing a state of an input, comprising:
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operating said engine in a non-split engine mode in response to said electronic circuit sensing a first state of said input; operating said engine in a half-power split engine mode in response to said electronic circuit sensing a second state of said input by sequentially activating a first half of said fuel injectors during a first time period, and activating a second half of said fuel injectors during a second time period; and operating said engine in a three-quarters power split engine mode in response to said electronic circuit sensing a third state of said input by sequentially activating a first subset of said fuel injectors during a third time period, activating all of said injectors during a fourth time period, and activating a second subset of said fuel injectors during a fifth time period. - View Dependent Claims (2)
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3. A method of selectively activating fuel injectors in an engine having multiple cylinders and an electronic circuit for sensing a state of an input, comprising:
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activating all of said fuel injectors in response to said electronic circuit sensing a first state of said input; alternately activating a first subset of said injectors and a second subset of said injectors in response to said electronic circuit sensing a second state of said input; and alternately activating a third subset of said injectors, a fourth subset of said injectors, and a fifth subset of said injectors in response to said electronic circuit sensing a third state of said input. - View Dependent Claims (4, 5)
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6. A method of cycling a first, a second, a third, a fourth, a fifth, a sixth, a seventh, and an eighth fuel injector in an engine, said method comprising the steps of:
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(a) firing said first, second, fourth, fifth, seventh, and eighth fuel injectors while inhibiting firing of said third and sixth injectors; (b) firing said second, third, fifth, sixth, and eighth fuel injectors while inhibiting firing of said first, fourth and seventh fuel injectors; (c) firing said first, third, fourth, sixth, and seventh fuel injectors while inhibiting firing of said second, fifth and eighth fuel injectors; and (d) repeating steps (a) through (c).
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7. A method of selectively activating fuel injectors in an engine having multiple cylinders and an electronic circuit for sensing throttle position, manifold air pressure, and temperature, said method comprising the steps:
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activating all of said fuel injectors in response to said electronic circuit sensing a first state of said inputs; alternately activating a first subset of said injectors synchronously with an engine timing signal and a second subset of said injectors synchronously with said engine timing signal in response to said electronic circuit sensing a second state of said inputs; and alternately activating a third subset of said injectors synchronously with said engine timing signal, a fourth subset of said injectors synchronously with said engine timing signal, and a fifth subset of said injectors synchronously with said engine timing signal, in response to said electronic circuit sensing a third state of said inputs, all injectors being activated within six revolutions of an engine crankshaft.
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8. A method of selectively activating fuel injectors in an engine having multiple cylinders and an electronic circuit for sensing a state of an input, comprising:
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activating all of said fuel injectors in response to said electronic circuit sensing a first state of said input; and alternately activating a first subset of said injectors, all of said injectors, and a second subset of said injectors in response to said electronic circuit sensing a second state of said input.
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Specification