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FJR Motorcycle Forums
Technical & Mechanical Problems
Fuel Economy and Smoothness without Compromise
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<blockquote data-quote="UselessPickles" data-source="post: 864242" data-attributes="member: 3256"><p>Suggestions are always welcome <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> </p><p></p><p></p><p>Engine load might be some nice secondary info to use, but it's very complex to calculate with lots of pre-calculated lookup tables for temperature and volumetric efficiency corrections. There's no way I'd be able to come up with a correct engine load calculation.</p><p></p><p>Also, engine load is not my primary concern. I simply want to know if I'm cruising at a steady speed. If throttle or RPM are changing more than an amount expected during steady cruising, then I don't want to be in cruising mode. My goal is not to reproduce stock-like closed-loop functionality to meet EPA requirements. My goal is to have very smooth throttle, but save some fuel when I'm just cruising down the road.</p><p></p><p>If I ignore RPMs between idle and 6000 RPM, then there's no way I can know if the speed is relatively steady. I could only know that engine load is relatively steady, which might mean steady acceleration or deceleration. Load is probably more important for factory systems deciding when to be in closed-loop mode, because closed-loop mode means 14.7:1 AFR, which is a lean mixture that can only be used for low loads. I don't want a lean mixture in all low-load conditions. I only want it in steady cruising conditions. I also don't need to worry about considering load when deciding to switch to/from cruising mode. I can simply only configure my cruising AFR map to use a lean mixture at throttle/RPM combinations that are known to be steady cruising combinations (and therefore not high load).</p></blockquote><p></p>
[QUOTE="UselessPickles, post: 864242, member: 3256"] Suggestions are always welcome :) Engine load might be some nice secondary info to use, but it's very complex to calculate with lots of pre-calculated lookup tables for temperature and volumetric efficiency corrections. There's no way I'd be able to come up with a correct engine load calculation. Also, engine load is not my primary concern. I simply want to know if I'm cruising at a steady speed. If throttle or RPM are changing more than an amount expected during steady cruising, then I don't want to be in cruising mode. My goal is not to reproduce stock-like closed-loop functionality to meet EPA requirements. My goal is to have very smooth throttle, but save some fuel when I'm just cruising down the road. If I ignore RPMs between idle and 6000 RPM, then there's no way I can know if the speed is relatively steady. I could only know that engine load is relatively steady, which might mean steady acceleration or deceleration. Load is probably more important for factory systems deciding when to be in closed-loop mode, because closed-loop mode means 14.7:1 AFR, which is a lean mixture that can only be used for low loads. I don't want a lean mixture in all low-load conditions. I only want it in steady cruising conditions. I also don't need to worry about considering load when deciding to switch to/from cruising mode. I can simply only configure my cruising AFR map to use a lean mixture at throttle/RPM combinations that are known to be steady cruising combinations (and therefore not high load). [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Fuel Economy and Smoothness without Compromise
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