Integrated feed forward air/fuel ratio sensor for gaseous fuel engines
First Claim
1. An integrated air/fuel sensor for a gaseous fuel internal combustion engine having a fuel supply system with an air intake passage means, said sensor comprising:
- a housing,a mass air flow sensor contained in said housing, said mass air flow sensor providing a first output signal representative of the mass of air flow through the mass air flow sensor,a mass gas flow sensor contained in said housing, said mass gas flow sensor providing a second output signal representative of the mass of gas flow through the mass gas flow sensor,means for mounting said housing in the fuel supply system so that said mass air flow sensor is fluidly connected in series with the air intake passage means and said mass gas flow sensor is fluidly connected in series with the fuel intake passage means,means responsive to said first and second outputs for computing and generating a third output signal representative of the air/fuel ratio for the fuel system.
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Accused Products
Abstract
An integrated air/fuel sensor is disclosed for use with a gaseous fuel internal combustion engine. The sensor includes a housing having a mass air flow sensor which provides an output signal representative of the mass of air flow through the mass air flow sensor. Similarly, a mass gas sensor is also contained in the housing which provides an output signal representative of the mass of gas flow through the mass gas flow sensor. The integrated air/fuel sensor is mounted to the air and fuel supply system for the engine upstream from the internal combustion engine. The output signal from both flow sensors are provided as input signals to a circuit which calculates the air/fuel ratio to the engine and provides an output signal representative thereof to the fuel management system for the engine.
33 Citations
12 Claims
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1. An integrated air/fuel sensor for a gaseous fuel internal combustion engine having a fuel supply system with an air intake passage means, said sensor comprising:
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a housing, a mass air flow sensor contained in said housing, said mass air flow sensor providing a first output signal representative of the mass of air flow through the mass air flow sensor, a mass gas flow sensor contained in said housing, said mass gas flow sensor providing a second output signal representative of the mass of gas flow through the mass gas flow sensor, means for mounting said housing in the fuel supply system so that said mass air flow sensor is fluidly connected in series with the air intake passage means and said mass gas flow sensor is fluidly connected in series with the fuel intake passage means, means responsive to said first and second outputs for computing and generating a third output signal representative of the air/fuel ratio for the fuel system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification