PROCESS FOR USE WITH DUAL-FUEL SYSTEMS
First Claim
1. A gaseous-fuel fumigation system for use with a diesel engine, comprising:
- a valve disposable in a flow path between a gaseous-fuel supply and an air intake stream of a diesel engine, the valve being operative to regulate a flow volume of a gaseous-fuel through the flow path;
a pressure sensor operative to generate a pressure signal indicative of a pressure level of the air intake stream of the diesel engine;
an oxygen sensor operative to generate an oxygen content signal indicative of an oxygen content of an exhaust stream of the diesel engine; and
a controller operative to;
receive the pressure signal and the oxygen content signal;
compute a desired gaseous fuel flow volume based on the pressure level and the oxygen content; and
generate valve control signals for operating the valve to establish the desired gaseous fuel flow volume through the flow path.
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Accused Products
Abstract
A system and method is provided for use with a duel-fuel fumigation system. The system injects a gaseous-fuel flow into the air intake stream of a diesel engine. As presented, the system is operative to meter the gaseous-fuel flow into the diesel engine based on one or more engine parameters such as, for example, exhaust gas temperature, exhaust oxygen levels, engine speed, engine load and/or engine inlet pressure. Monitoring one or more engine parameters allows fine-tuning the flow of gaseous fuel into the engine and thereby prevents loss of engine power at high-end loads while maintaining favorable emission outputs over substantially the entire operating range of the engine.
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Citations
19 Claims
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1. A gaseous-fuel fumigation system for use with a diesel engine, comprising:
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a valve disposable in a flow path between a gaseous-fuel supply and an air intake stream of a diesel engine, the valve being operative to regulate a flow volume of a gaseous-fuel through the flow path;
a pressure sensor operative to generate a pressure signal indicative of a pressure level of the air intake stream of the diesel engine;
an oxygen sensor operative to generate an oxygen content signal indicative of an oxygen content of an exhaust stream of the diesel engine; and
a controller operative to;
receive the pressure signal and the oxygen content signal;
compute a desired gaseous fuel flow volume based on the pressure level and the oxygen content; and
generate valve control signals for operating the valve to establish the desired gaseous fuel flow volume through the flow path. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for use with gaseous-fuel fumigation system attached to a diesel engine, comprising:
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establishing a gaseous-fuel flow through a valve disposed between a gaseous-fuel supply and an air intake stream of a diesel engine, wherein the valve is operative for regulating a volume the gaseous-fuel flow;
monitoring an inlet pressure of the diesel engine;
monitoring an exhaust oxygen content of the diesel engine;
based on the inlet pressure and the exhaust oxygen content, adjusting the valve to regulate the flow volume of the gaseous-fuel through the flow path. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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Specification