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#1
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What is VTEC?
Yeah, I know it's some sort of variable valve timing. But exactly
what is it as implemented in my 2006 Civic LX? I've done a lot of searching on the web, but I can't find my answers. When does it activate? Is it a smooth, continuous action, or is it a step change in configuration at some engine speed? Is it somehow changing the fulcrums of the rocker arms? Is it rotating cam lobes on the cam shafts? Is it rotating the cam shaft relative to the pully driven by the timing belt? Is it selecing different cam lobes? Is it a change of the valve lift? Opening only? Closing only? Is its activation a function of engine speed only, or load, throttle position, airflow, etc.? Is it done with solenoids in the head, or is oil pressure used? Any pointers to detailed engineering descriptions would be greatly appreciated. Thanks. |
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#2
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What is VTEC?
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#3
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What is VTEC?
(User) wrote in
: > Yeah, I know it's some sort of variable valve timing. But exactly > what is it as implemented in my 2006 Civic LX? I've done a lot of > searching on the web, but I can't find my answers. <snip> > > Any pointers to detailed engineering descriptions would be greatly > appreciated. > The best one? http://www.leecao.com/honda/vtec/index.html And a very useful pointer indeed is he www.google.com Type in thgese search terms exactly (including the quotes): "how vtec works" Two that came up when I did just that: http://honda_fans.tripod.com/vtec-info.html (has cool animation) and my own page: http://www.tegger.com/hondafaq/vtec.html -- TeGGeR® The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ |
#4
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What is VTEC?
GOOGLE http://auto.howstuffworks.com/question229.htm
Not too complicated is it! VTEC 10 years ago and today is the same. Only slight adjustments to improve power or feul consumption have been made since. But the basic are the same. "User" > wrote in message ... > Yeah, I know it's some sort of variable valve timing. But exactly > what is it as implemented in my 2006 Civic LX? I've done a lot of > searching on the web, but I can't find my answers. > > When does it activate? Is it a smooth, continuous action, or is it a > step change in configuration at some engine speed? Is it somehow > changing the fulcrums of the rocker arms? Is it rotating cam lobes on > the cam shafts? Is it rotating the cam shaft relative to the pully > driven by the timing belt? Is it selecing different cam lobes? Is it > a change of the valve lift? Opening only? Closing only? Is its > activation a function of engine speed only, or load, throttle > position, airflow, etc.? Is it done with solenoids in the head, or is > oil pressure used? > > Any pointers to detailed engineering descriptions would be greatly > appreciated. > > Thanks. > |
#5
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What is VTEC?
VTEC 10 years ago and now is the same principle or it would not be called
VTEC. Only adjustments to the VTEC configuration make either improvement in performance or feul economy. As an example, the VTEC-E. Same priniple but the setting are differenent. VTEC kicks in at 2500 RPM. You don't feel it when it does kick in. I don't know how a VTEC back then could be different from today. "Elmo P. Shagnasty" > wrote in message ... > In article >, > "Me" > wrote: > >> VTEC 10 years ago and today is the same. > > Not *quite*. > |
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