Title: Proton's Cps = Porsche's Variocam Plus
drexchan - February 21, 2009 08:33 PM (GMT)
Proton's CPS
Porsche's Variocam Plus
About Variocam PlusIt is implemented by using variable hydraulic tappets. As shown in the picture, each valve is served by 3 cam lobes - the center one has obviously less lift (3 mm only) and shorter duration for valve opening. In other words, it is the "slow" cam. The outer two cam lobes are exactly the same, with fast timing and high lift (10 mm). Selection of cam lobes is made by the variable tappet, which actually consists of an inner tappet and an outer (ring-shape) tappet. They could by locked together by a hydraulic-operated pin passing through them. In this way, the "fast" cam lobes actuate the valve, providing high lift and long duration opening. If the tappets are not locked together, the valve will be actuated by the "slow" cam lobe via the inner tappet. The outer tappet will move independent of the valve lifter.
As seen, the variable lift mechanism is unusually simple and space-saving. The variable tappets are just marginally heavier than ordinary tappets and engage nearly no more space.
Nevertheless, at the moment the Variocam Plus is just offered for the intake valves.
drexchan - February 21, 2009 08:35 PM (GMT)
Tengku Djan started his motorsport career with Porsche Motorsport Weissach, Germany where he worked on the first 911(996) GT3 project and was exposed to Porsche's 996 GT1 Le Mans programme.
ahboy - February 22, 2009 04:16 AM (GMT)
so means our campro engine got potential?
khguan - February 22, 2009 11:23 AM (GMT)
wow.. the cam lobes looks very thin..
kazami32 - February 22, 2009 02:59 PM (GMT)
wow...so is this mean this time proton got spend their right investment on produce new CPS engine?
seanlee - February 24, 2009 08:38 AM (GMT)
thnks for the detail infor drex :tb:
HIM-App - February 24, 2009 11:42 AM (GMT)
Drex - Porsche I'm sure has their patent on the design. I doubt Proton can copy the design to that extent - I'm thinking there's bound to be something different that Proton or Porsche has done differently, so I don't think it's identical. Just similar?
chiewwl - February 24, 2009 01:45 PM (GMT)
no copy lah.. but similar technology...
MIVEC - HiVEC - iVTEC - DVVT - VVTi - CPS
drexchan - February 24, 2009 05:45 PM (GMT)
| QUOTE (HIM-App @ Feb 24 2009, 07:42 PM) |
| Drex - Porsche I'm sure has their patent on the design. I doubt Proton can copy the design to that extent - I'm thinking there's bound to be something different that Proton or Porsche has done differently, so I don't think it's identical. Just similar? |
New Zealand Apple and Taiwan Apple.
BTW, who do you think invented this valve lift technology? Who worked for Porsche? Who patented the technology?
Answer: Lotus, Lotus, Lotus.
seanlee - February 25, 2009 03:07 AM (GMT)
i doubt proton Exora also using CPS ...also..hahaha
drexchan - February 25, 2009 07:00 AM (GMT)
| QUOTE (seanlee @ Feb 25 2009, 11:07 AM) |
| i doubt proton Exora also using CPS ...also..hahaha |
err.. then do you think it uses CPS or not?
"Doubt" means you don't think it uses.
seanlee - February 25, 2009 10:23 AM (GMT)
| QUOTE (drexchan @ Feb 25 2009, 03:00 PM) |
| QUOTE (seanlee @ Feb 25 2009, 11:07 AM) | | i doubt proton Exora also using CPS ...also..hahaha |
err.. then do you think it uses CPS or not?
"Doubt" means you don't think it uses.
|
oops..thanks for the correction bro..
drexchan - February 26, 2009 06:15 AM (GMT)
BTW, I didn't mean that it's exactly the same technology as the Variocam Plus (variable timing and lift). CPS only uses the variable lift part, not the variable timing part.
cliff2068 - February 27, 2009 07:42 AM (GMT)
jctasoga - February 27, 2009 11:24 AM (GMT)
u mean cps engine reliable or not?
laytiong n i can be test mice and a few other few thousand CPS members out there... exora, waja, gen 2, neo and upcoming persona in future would get it too...
drexchan - February 27, 2009 02:29 PM (GMT)
I have never heard of any CPS failure so far.
