Oxygen sensor and feedback system for outboard motor engine

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a sensor housing having a sensor chamber, a sensor body having a sensor element disposed in the sensor chamber, a first passage connecting the combustion chamber with the sensor chamber, a sleeve extending through the first passage, at least a first flange supporting the sleeve and arranged proximate to the combustion chamber and a second flange supporting the sleeve and arranged distally from the combustion chamber, the flanges being configured to maintain a gap between an inner surface of the first passage and an outer surface of the sleeve, and an extension of the sleeve extending from the second flange and towards the sensor chamber.

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a sensor chamber, a sensor body having a sensor element disposed in the sensor chamber, a first passage connecting the combustion chamber with the sensor chamber, a sleeve extending through the first passage, and a plurality of flanges supporting the sleeve within the first passage so as to define a gap between an inner surface of the first passage and an outer surface of the sleeve, an inner diameter of the sleeve being greater than one-half of an outer diameter defined by the outer surface of the sleeve.

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a sensor housing having a sensor chamber, a sensor body having a sensor element disposed in the sensor chamber, the sensor element having an outer diameter, a through hole extending through a wall of the combustion chamber, a guide passage connecting the through hole with the sensor housing, and a communication hole connecting the guide passage with the sensor chamber, a diameter of the communication hole being larger than the diameter of the sensor element.

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a combustion condition sensor, a housing defining a resonance chamber and being configured to receive the sensor such that the sensor is exposed to the resonance chamber, the resonance chamber being configured such that a resonance frequency of the resonance chamber is not less than approximately a maximum rated speed of the engine.

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a combustion condition sensor, a housing defining a resonance chamber and being configured to receive the sensor such that the sensor is exposed to the resonance chamber, and means for effecting a resonance frequency of the resonance chamber to be at least as high as a maximum rated engine speed of the engine.

An outboard motor comprising an internal combustion engine having an engine body defining at least one combustion chamber, a charge former configured to deliver fuel charges to the engine body for combustion in the combustion chamber, a combustion condition sensor communicating with the combustion chamber and a controller configured to control operation of the charge former in response to an output of the combustion condition sensor when the engine is in a first operation state and to control the operation of the charge former irrespective of the output of the combustion condition sensor when the engine is in a second operation state.