System and method for supplying fuel to an engine via multiple fuel paths
First Claim
Patent Images
1. An engine system, comprising:
- a first group of fuel injectors;
a second group of fuel injectors;
a serial communication bus;
a first controller including instructions for directly driving the first group of fuel injectors and supplying commands via the serial communication bus to operate the second group of fuel injectors; and
a second controller including instructions for receiving the commands via the serial communication bus and directly driving the second group of fuel injectors, where the first group of fuel injectors and the second group of fuel injectors supply different fuel types to an engine, and where the commands include fuel injector pulse widths, and where the fuel injector pulse widths are sent over the serial communication bus at a timing that is responsive to engine position.
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Abstract
A system and method for supplying fuel to an engine is disclosed. In one example, a first controller supplies injector commands to a second controller via an asynchronous serial communication bus. The system may reduce the complexity of supplying two or more fuels to an engine.
32 Citations
17 Claims
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1. An engine system, comprising:
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a first group of fuel injectors; a second group of fuel injectors; a serial communication bus; a first controller including instructions for directly driving the first group of fuel injectors and supplying commands via the serial communication bus to operate the second group of fuel injectors; and a second controller including instructions for receiving the commands via the serial communication bus and directly driving the second group of fuel injectors, where the first group of fuel injectors and the second group of fuel injectors supply different fuel types to an engine, and where the commands include fuel injector pulse widths, and where the fuel injector pulse widths are sent over the serial communication bus at a timing that is responsive to engine position. - View Dependent Claims (2, 3, 4, 5)
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6. A system, comprising:
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a first group of injectors; a second group of injectors; a first controller including instructions for commanding the first group of injectors via a first group of instructions and the second group of injectors via a second group of instructions, the first controller directly driving the first group of injectors; and a second controller including instructions for directly driving the second group of injectors via the second group of instructions, and additional instructions within the second controller for estimating position of an engine from an input that receives a digital pattern that repeats every cycle of the engine. - View Dependent Claims (7, 8, 9)
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10. A method for operating an engine, comprising:
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directly driving a first group of fuel injectors via a first controller; supplying fuel injector pulse width data from the first controller to a second controller via a sole asynchronous serial communication bus; and directly driving a second group of fuel injectors based on the fuel injector pulse width data via the second controller. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification