VTEC Operation
#12
05-20-2007, 07:29 PM
RE: VTEC Operation
The schematic of the valving was of some help.
If the Rocker arm assembly is rotated clockwise 120 degrees,it would represent the view over the front cyl headbank.
The drawing of the pressure sequence is crude and inaccurate.
Yellow shows oil flowing down the Pivot shaft and intoa rocker arm.
The rocker arms P & S are shown as a top (overhead) view looking down.
What appears to be holes in earsare valve adjustment screws.
Trust that wasn't out of a Honda manual.
Surprising that operational details of the system aren't widely known.
If the Rocker arm assembly is rotated clockwise 120 degrees,it would represent the view over the front cyl headbank.
The drawing of the pressure sequence is crude and inaccurate.
Yellow shows oil flowing down the Pivot shaft and intoa rocker arm.
The rocker arms P & S are shown as a top (overhead) view looking down.
What appears to be holes in earsare valve adjustment screws.
Trust that wasn't out of a Honda manual.
Surprising that operational details of the system aren't widely known.
#13
05-20-2007, 10:10 PM
RE: VTEC Operation
ORIGINAL: RogerB34
The schematic of the valving was of some help.
If the Rocker arm assembly is rotated clockwise 120 degrees,it would represent the view over the front cyl headbank.
The drawing of the pressure sequence is crude and inaccurate.
Yellow shows oil flowing down the Pivot shaft and intoa rocker arm.
The rocker arms P & S are shown as a top (overhead) view looking down.
What appears to be holes in earsare valve adjustment screws.
Trust that wasn't out of a Honda manual.
Surprising that operational details of the system aren't widely known.
The schematic of the valving was of some help.
If the Rocker arm assembly is rotated clockwise 120 degrees,it would represent the view over the front cyl headbank.
The drawing of the pressure sequence is crude and inaccurate.
Yellow shows oil flowing down the Pivot shaft and intoa rocker arm.
The rocker arms P & S are shown as a top (overhead) view looking down.
What appears to be holes in earsare valve adjustment screws.
Trust that wasn't out of a Honda manual.
Surprising that operational details of the system aren't widely known.
Sorry to bother you with the disagreeable information! I'll have to make a note of that in the future;
NOTE TO SELF; Post no info for RodgerB34 unlessI feel the need to be slammed and flamed.
There ya go all fixed now
#14
05-20-2007, 10:24 PM
RE: VTEC Operation
ORIGINAL: RogerB34
Surprising that operational details of the system aren't widely known.
Surprising that operational details of the system aren't widely known.
#16
05-21-2007, 07:42 PM
RE: VTEC Operation
Had nothing to do with you
Take it anyway you like bro.
Honda doesn't reveal it's secrets?
LOL.
You don't think that GM/Ford/Chrysler and all competitors haven't reverse engineered their product?
Get real.
Take it anyway you like bro.
Honda doesn't reveal it's secrets?
LOL.
You don't think that GM/Ford/Chrysler and all competitors haven't reverse engineered their product?
Get real.
#17
05-22-2007, 07:05 PM
RE: VTEC Operation
Chery will be imported to the USA by Chrysler in a few years.
You can bet it will incorporate everyengineering technique feasiblefrom Toyota, Honda, VW, GM.
Some systems are patented.
Like Toyota split system hybrid in Ford Escape.
Others are not.
And those that are can be engineered around by a legal process that results in the same function different process.
Hence reverse engineering for the keys.
You can bet it will incorporate everyengineering technique feasiblefrom Toyota, Honda, VW, GM.
Some systems are patented.
Like Toyota split system hybrid in Ford Escape.
Others are not.
And those that are can be engineered around by a legal process that results in the same function different process.
Hence reverse engineering for the keys.
#18
05-24-2007, 08:38 PM
RE: VTEC Operation
I noted that theDIY VTEC drawing is correctly depicted.
For the rear bank.
It does showoil hydraulic pressureentering the Primary rocker arm, activating the Synchronization Piston A and B.
The Timing piston and Spring are in the Secondary rocker arm.
A remaining piece of the puzzle is the Power Shaft configuration.
Is it an open tube or segmented for each set of rocker arms?
My guess would be segmented for each set for independent timing.
For the rear bank.
It does showoil hydraulic pressureentering the Primary rocker arm, activating the Synchronization Piston A and B.
The Timing piston and Spring are in the Secondary rocker arm.
A remaining piece of the puzzle is the Power Shaft configuration.
Is it an open tube or segmented for each set of rocker arms?
My guess would be segmented for each set for independent timing.
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