The Variable Cylinder Management Technology (VCM643)

[sonicvipz]

This is new.. 

VCM643 from Honda.

Variable Cylinder Management (VCM) technology maintains power and optimizes fuel economy simultaneously. It activates the engine?s cylinders as needed to meet the demands of both acceleration and fuel efficiency. At 6 cylinder mode, the engine produces an exhilarating kick with its powerful V6 engine, while at 4 cylinder mode, it produces both power and fuel efficiency. And at 3 cylinder mode, fuel saving is achieved. Check what's VCM643 all about at http://www.vcm643.com

:wav:

[splerdu]

kala ko plate number.

[Carloboy]

dear Toyota,

napag-iwanan na naman kayo ng Honda....... tsk tsk tsk!!! outdated na mga makina nyo ngayon, puro kayo VVT-i luma na yan

[kenai9]

dear Toyota,

napag-iwanan na naman kayo ng Honda....... tsk tsk tsk!!! outdated na mga makina nyo ngayon, puro kayo VVT-i luma na yan

kawawa ka naman... hindi pinag bigyan ng toyota phils. ang wish mo. hahaha!!!

[Manga]

dear Toyota,

napag-iwanan na naman kayo ng Honda....... tsk tsk tsk!!! outdated na mga makina nyo ngayon, puro kayo VVT-i luma na yan

VTEC was started by Honda, 1989. Other Manufacturers such as mitsubishi developed the MIVEC, however was bound to  intellectual property rights filed by honda. That only after 10 years of enjoying such technology may other manufacturers put out their version of VTEC in the market. Toyota released VVTi 1999

BMW is using this VCM technology already. If i'm not mistaken this is one of the features of the V10 M6, where 2 cylinders can be switched off to save on fuel.

Honda may be the first to take it to three stages, But others went first using such technology this time around.

[memnon]

Mitsubishi also developed the same technology way back in 1995, with the MIVEC-MD, for Modulated Displacement. it shuts off 2 cylinders below 3k RPM thus making it fuel efficient.

[AM]

VTEC was started by Honda, 1989. Other Manufacturers such as mitsubishi developed the MIVEC, however was bound to  intellectual property rights filed by honda. That only after 10 years of enjoying such technology may other manufacturers put out their version of VTEC in the market. Toyota released VVTi 1999

Before VVTi Toyota had the older VVT system which they released in 1991 with the 20-valve silvertop 4A-GE engine.


VCM in the all-new 2008 Accord.




First production car to use VVT? Alfa Romeo back in 1980, It was mechanical.

[splerdu]

VTEC was started by Honda, 1989. Other Manufacturers such as mitsubishi developed the MIVEC, however was bound to  intellectual property rights filed by honda. That only after 10 years of enjoying such technology may other manufacturers put out their version of VTEC in the market. Toyota released VVTi 1999

BMW is using this VCM technology already. If i'm not mistaken this is one of the features of the V10 M6, where 2 cylinders can be switched off to save on fuel.

Honda may be the first to take it to three stages, But others went first using such technology this time around.

Nope, honda definitely wasn't the first to do variable valve. Alfa Romeo had variable valve on the Spider as early as the 1980s.

Honda isn't the first to do variable displacement either, nor the first to do it in three steps. Remember the Caddilac Eaton engine? Yep that was 8-6-4, and also in the 80s. Mitsubishi was the next to try their hand on variable displacement with Mivec-MD. Variable displacement is alive, and in-use today on the Chrysler 300C.

[Manga]

Cool! thanks for the info.
But what was the 10 year lock period, enjoyed by Honda, against other manufacturers to release similar technology to VTEC?

[Rocky]

Dodge/Chrysler/Jeep have Multi-Displacement System on their V8 Hemi engines.  It shuts off 4 cylinders during slow city driving and even when cruising up to 125 kph.

[johnqpublic318]

Yup, Honda is late...  Due to its efficient and small engines, Honda didn't immediately resort to Variable Cylinder Management or Multiple Displacement Systems until today cause Honda engines are now bigger.  The Americans were 1st to use such technology in mass production vehicles.  The finest and most reliable example is the 5.7 Hemi from Chrysler.

[Agent J]

correct me if i'm wrong... when honda was using VTEC, toyota and other manufacturers were not allowed to use similar technology that's why toyota released only a VVT-i in the 90s and not VVTL-i (which is equivalent to VTEC)

[AM]

correct me if i'm wrong... when honda was using VTEC, toyota and other manufacturers were not allowed to use similar technology that's why toyota released only a VVT-i in the 90s and not VVTL-i (which is equivalent to VTEC)

Honda was the only one smart enough to use it as a marketing tool at first, thats why people think they invented the VVT technology.
What they did was improve the technology and spread it across their model range quickly, but they were not the first to invent or use this system.

Toyota's VVT systems
VVT (1991) 
VVTi (1996)
Dual-VVTi (1998)
VVTL-i (1998)
Valvematic = VVTi + continuous valve lift control (2007)

I believe the main difference between the 1991 VVT and 1996 VVTi?
VVT = 2-stage cam phasing
VVTi ("i" stands for Intelligent) = continuously variable cam phasing depending on the rpm, can detect if you are accelerating, going up hill or down hill etc.

Toyota's VVTi system has no direct VTEC equivalent.
Here's the list of different Variable Valve Timing systems by Road & Track magazine... Enjoy!


1st mechanical VVT in a prodcution car was used by Alfa Romeo in the 1980 Spider 2.0
1st electronic VVT in a prodcution car was used by Nissan on the 1987 300ZX
Honda's "smarter" VTEC system was introduced in 1989

[Agent J]

good info! thanks!  :thumbsup:

[memnon]

very informative. matipid ba yung 300c and the like? akala ko dati gas guzzlers yung mga yun.