Fuel control system and associated method
First Claim
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1. A fuel control system for controlling the purging of alternate fuel in an internal combustion engine at shutdown, comprising:
- at least one valve device configured to deliver a fuel supply to an engine;
a first fuel source configured to provide a primary fuel to the at least one valve device;
a second fuel source configured to provide an alternate fuel to the at least one valve device; and
a controller connected to the at least one valve device and connected to an ignition system, the controller being configured to;
control the at least one valve device to selectively deliver the primary fuel, the alternate fuel, or a mixture of the primary fuel and the alternate fuel, to the engine; and
control the at least one valve device to selectively deliver the primary fuel to the engine to purge the alternate fuel in the engine responsive to a shutdown request status of one of the engine and the ignition system.
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Abstract
A fuel control system for controlling the purging of alternate fuel in an internal combustion engine at shutdown includes: at least one valve device configured to deliver a fuel supply to the engine; a first fuel source configured to provide a primary fuel to the valve device; a second fuel source configured to provide an alternate fuel to the valve device; and a controller connected to the valve device and adapted to be connected to an ignition system. The controller is configured to control the valve device responsive to a status of one of the engine and the ignition system.
53 Citations
19 Claims
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1. A fuel control system for controlling the purging of alternate fuel in an internal combustion engine at shutdown, comprising:
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at least one valve device configured to deliver a fuel supply to an engine; a first fuel source configured to provide a primary fuel to the at least one valve device; a second fuel source configured to provide an alternate fuel to the at least one valve device; and a controller connected to the at least one valve device and connected to an ignition system, the controller being configured to; control the at least one valve device to selectively deliver the primary fuel, the alternate fuel, or a mixture of the primary fuel and the alternate fuel, to the engine; and control the at least one valve device to selectively deliver the primary fuel to the engine to purge the alternate fuel in the engine responsive to a shutdown request status of one of the engine and the ignition system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An internal combustion engine assembly capable of operating on primary and alternate fuels, comprising:
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an internal combustion engine; a first fuel source connected to the engine; a second fuel source connected to the engine; a fuel control unit connected with the first and second fuel sources for regulating fuel to the engine; an ignition system; and a controller connected to the engine, the fuel control unit and the ignition system, the controller being configured to control the fuel control unit responsive to a shutdown request status of one of the engine and the ignition system; the controller further adapted to be able to selectively deliver a primary fuel, an alternate fuel, or a mixture of the primary fuel and the alternate fuel, to the engine; and the controller further adapted to control at least one valve device to selectively deliver the primary fuel to the engine to purge the alternate fuel in the engine in response to the shutdown request status of the one of the engine and the ignition system. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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Specification