Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Patent
1990-12-21
1992-04-21
Kamen, Noah P.
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
25112922, F02B 4300
Patent
active
051057913
ABSTRACT:
An electric current to gas pressure transducer provides a very low output pressure of just a few inches of water column and is capable of providing a negative or vacuum output as well as a low position pressure output. This transducer is used in an air/fuel ratio control system for natural gas fueled, naturally aspirated reciprocating engines to provide a fluid output to bias the setpoint or pressure loading input side of the engine's fuel gas regulator. A sensor in the engine's exhaust senses exhaust gas composition and provides an electric current to the transducer related to exhaust gas composition. The current powers an electromagnet in the transducer which regulates the flow of a fluid through an orifice to provide the fluid output at a pressure related to the exhaust gas composition for biasing the setpoint of the engine's gas fuel regulator in relation to exhaust gas composition for enhanced engine operation.
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Blum Alvin S.
Kamen Noah P.
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