Air injection for emissions? Taotao 110cc.
#1
Air injection for emissions? Taotao 110cc.
I noticed on many of the engine close-up pics floating around the web, some of the Taotao 110cc appear to have a small flanged stub on the exhaust near the cylinder head with a check valve on it. Don't tell me they're injecting some air to 'lean-out' the exhaust?!??! What an ugly bunch of hardware to strap on to these babies. This pic isn't the best. There was some great closeups on eBay, but I can't find'em now.
Joel
Joel
#3
#4
The one I have has it. I always wondered what it was
#5
Yeah, I believe the science behind it is; The extra oxygen admitted into the exhaust stream will burn off more unburnt hydrocarbons (basically just dilute the stream). REALLY cheesy way to achieve this. The other possibility is that little bulge in the exhaust pipe downstream of the check valve is actually a small catalytic converter (I doubt it is), if so, air injection helps light off the cat quicker.
Joel
Joel
#6
Here's the picture I was thinking of. What an ugly appendage to put on there. I believe there's also a big air filter canister at the top of the black hose:
Photo compliments of this fella: 2009 110cc KIDS ATV (ATA-110D1) !! ON SALE NOW !!:eBay Motors (item 270468912682 end time Oct-18-09 18:22:13 PDT)
Joel
Photo compliments of this fella: 2009 110cc KIDS ATV (ATA-110D1) !! ON SALE NOW !!:eBay Motors (item 270468912682 end time Oct-18-09 18:22:13 PDT)
Joel
#7
Here's the picture I was thinking of. What an ugly appendage to put on there. I believe there's also a big air filter canister at the top of the black hose:
Photo compliments of this fella: 2009 110cc KIDS ATV (ATA-110D1) !! ON SALE NOW !!:eBay Motors (item 270468912682 end time Oct-18-09 18:22:13 PDT)
Joel
Photo compliments of this fella: 2009 110cc KIDS ATV (ATA-110D1) !! ON SALE NOW !!:eBay Motors (item 270468912682 end time Oct-18-09 18:22:13 PDT)
Joel
(lots of sarcasm in that comment if you didnt notice)
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#8
#9
Granted it's a kids machine, that's what I was thinking. Being right on that bend, your only (somewhat) option is to blank it off right at the flange on the pipe, but then you've still got the stub/flange to contend with. Cutting the flange out and clamping the cut pipes back together with a decent clamp wont work on a bend and I can't weld! Maybe you can add propane injection and have extra rocket propulsion out the exhaust!! Hang on.... WHEEEEEEEEEEEEEEEE!!
Joel
Joel
#10
Poking around the net, I found out that bulge in the exhaust pipe just downstream of the air injection check valve IS a catalytic converter! Dude's got pictures where he cut the pipe on the inlet side and drilled out the honeycomb guts (which took some doing), then welded the pipe back up. I can't imagine there would be too much precious metal catalyst in them to do any 'catalyzing', but regardless, it's gotta get scorching hot.
Joel
Joel
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