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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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<blockquote data-quote="Magnetoman" data-source="post: 107284" data-attributes="member: 2806"><p>An oxygen sensor of the type you have (now known as a "narrow-band" oxygen sensor") has a sharp transition in its output voltage at stoichiometric 14.7 AFR. For air pollution purposes on a car that's perfect because it can be incorporated in a feedback loop to keep unburned gasoline in the exhaust at a minimum. However, for our purposes it's a lot less than ideal.</p><p></p><p>Maximum power from engines happens around 12-13 AFR, <em>very</em> far from 14.7. While a narrow band sensor still provides a signal when off stoichiometry, that signals is nonlinear and very temperature dependent (as opposed to the sharp transition at 14.7). As a result, a voltmeter reading of 0.5 tells you the AFR is 14.7, but any voltages above or below that only tell you the mixture is richer or leaner than 14.7, not how much richer or leaner. </p><p></p><p>Having a wide-band sensor is like when you were a child playing hide-and-seek, where you were constantly given clues like "getting colder, very cold, warmer, very warm, hot" to help you find the object. In contrast, a narrow-band sensor wouldn't give you any clues until you were very near the object and then only would tell you "hot" (or "cold" if you were close but had just passed it). To stretch this a bit further, a narrow-band sensor will help you find the 14.7 prize, but a wide-band sensor will help you find the continuum of more-valuable 12-13 prizes. </p><p></p><p>Further on the subject of sensor location, following is another excerpt from the Innovate LM-1 manual:</p><p></p><p>[ATTACH=full]27067[/ATTACH]</p></blockquote><p></p>
[QUOTE="Magnetoman, post: 107284, member: 2806"] An oxygen sensor of the type you have (now known as a "narrow-band" oxygen sensor") has a sharp transition in its output voltage at stoichiometric 14.7 AFR. For air pollution purposes on a car that's perfect because it can be incorporated in a feedback loop to keep unburned gasoline in the exhaust at a minimum. However, for our purposes it's a lot less than ideal. Maximum power from engines happens around 12-13 AFR, [I]very[/I] far from 14.7. While a narrow band sensor still provides a signal when off stoichiometry, that signals is nonlinear and very temperature dependent (as opposed to the sharp transition at 14.7). As a result, a voltmeter reading of 0.5 tells you the AFR is 14.7, but any voltages above or below that only tell you the mixture is richer or leaner than 14.7, not how much richer or leaner. Having a wide-band sensor is like when you were a child playing hide-and-seek, where you were constantly given clues like "getting colder, very cold, warmer, very warm, hot" to help you find the object. In contrast, a narrow-band sensor wouldn't give you any clues until you were very near the object and then only would tell you "hot" (or "cold" if you were close but had just passed it). To stretch this a bit further, a narrow-band sensor will help you find the 14.7 prize, but a wide-band sensor will help you find the continuum of more-valuable 12-13 prizes. Further on the subject of sensor location, following is another excerpt from the Innovate LM-1 manual: [ATTACH type="full" alt="27067"]27067[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Air Fuel Gauge 02 Sensor Lambda Sensor
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