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AssigneeDynojet Research, Inc.
InventorsMichael L Kreikemeier, Chad D Beauregard
Estimating the term…
A method and apparatus for externally modifying the operation of a closed loop electronic fuel injection control system that is normally used with a standard oxygen sensor, which method and apparatus includes replacing the standard oxygen sensor with a wide band oxygen sensor. The signal from the wide band oxygen sensor is processed in a first signal-conditioning module and coupled to the input of the electronic fuel injection control system. The first signal-conditioning module simulates the appearance of a standard oxygen sensor to the electronic fuel injection control system. In a second embodiment, a method and apparatus for externally modifying the operation of a closed loop electronic fuel injection control system that is normally used with a wide band oxygen sensor, includes intercepting the signal from the wide band oxygen sensor in a second signal-conditioning module. The second signal-conditioning module receives a first current from the wide band oxygen sensor and provides a second current to the electronic fuel injection control system.
In an internal combustion engine having a combustion chamber with an intake air channel, a fuel injector disposed in said intake air channel, an exhaust channel coupled to said combustion chamber, a standard oxygen sensor disposed in said exhaust channel, said standard oxygen sensor being of the type having a first output level indicating the presence of oxygen in said exhaust channel and a second output level indicating the absence of oxygen in said exhaust channel, and an electronic control unit connected to said standard oxygen sensor and responsive to said first and second output levels for controlling the amount of fuel injected by said fuel injector into said intake air channel, a method for modifying the operation of said internal combustion engine, said method comprising:
In an internal combustion engine combination comprising:
In an internal combustion engine having a combustion chamber with an intake air channel, a fuel injector disposed in said intake air channel, an exhaust channel coupled to said combustion chamber, a wide band oxygen sensor disposed in said exhaust channel, said wide band oxygen sensor being of the type for sensing unburned fuel and oxygen in said exhaust channel and having an output signal proportional to the air/fuel ratio in said intake air channel, and an electronic control unit connected to said wide band oxygen sensor and responsive to said output signal from said wide band oxygen sensor for controlling the amount of fuel injected by said fuel injector into said intake air channel, a method for modifying the operation of said internal combustion engine, said method comprising:
Dependencies are inferred from the claim text.