Quote:
Originally Posted by svxistentialist
Trevor
Only somebody recently returned from Mars would not know that the problem on this thread and many others is because of personal animosity between you and Harvey, so I see no point in being coy about this.
Your interpretation of what I propose in deleting personally insulting posts is interesting.
We are not in a court of law here, but the "evidence" I intend to delete will mainly be evidence of exceptionally bad manners and bad taste in the conduct of network correspondence.
You need not fear that I will "meddle" with anything of a technical nature. Nor should you worry about Chris founder, Chris is completely behind any action the admin team have to make to sort out this mess, knowing that we are applying THE RULES where members are overstepping very clearly defined boundaries.
Joe
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Joe,
The problem is not from Mars and comprises a complete thread started by Harvey with the express object of discrediting me. As a direct result I found it necessary to spend endless time in defence, in order to clear my name and prove that I was correct. No apology or acceptance of error was ever forthcoming from Harvey, nor was this requested by moderators. Now you have the temerity to raise the matter in retrospect and against me.
You confirm that you are unable to define boundaries/rules with fairness or logic. Your latest transgression is to destroy evidence. It will be interesting to have confirmed exactly that which you define as exceptionally bad manners and bad taste. Anticipating what has now come to pass, yonks ago I recorded two pertinent threads on disk. Here are extracts from Harvey's statements in part of one thread:-
“Post #17
Well I must admit that there was an ulterior motive for this thread. It was to bring to the attention of all the readers of this Network, that the Theory that you have infested the forums with, is erroneous, misleading, and a Technical embarrassment to the fine reputation of this Network for supplying helpful, and accurate information.
The posts that you have posted, and the article, are misleading and utterly wrong. I would suggest that to uphold the integrity, of the Subaru-SVX. Net, that you either correct them, or do the right thing by the Forum, and delete them.
Post #20. So I again ask, that you correct these statements, or do the right thing by the Network and delete them.
Post # 22.
All this crap you go on with, comes down to the fact that you can not conceive that the A, B,C, solenoids in the gear box, the Power steering solenoid, the Idle Air Control solenoid, the Carbon canister Purge solenoid, Exhaust Recirculation valves solenoid, the Air Con Actuator solenoid, are all driven by a Pulse Width Modulated signal to be smoothly moved, to any position, and held there by the Duty Cycle signal.
I again ask you to correct, or delete the unsupported claims you have made in posts on this Net.”
The issue involved was in no way trivial, nor is it a mess requiring poorly directed sorting. As a matter of real concern, accurate information available to members was in jeopardy.
My grievance has a sound, logical basis. The accurate write up, which Harvey arrogantly wrongly insisted be removed from the network, and which I found it necessary to successfully defended, is included below.
You now retain the option of silencing me by imposing a ban. Such is the slant of the contest. Whatever, I am confident that the accurate information I have recorded over the years, will prove more useful than dubious internally promoted management strata. That is, provided my text is left intact.
DUTY SOLENOID A.
A pulse width modulated duty solenoid valve, ( Sometimes known as a pulsoid), as is incorporated in the SVX transmission control system, adjusts pressure in the following manner :-
The fluid line is provided with a bleed or bypass via an on/off device in the form of an electrically operated valve. This solenoid valve is opened and closed repeatedly, in a rhythmical manner by a control current which is turned very rapidly on and off by the transmission control unit (TCU). The valve is a normally closed device, and remains closed in the event of the loss off a control current.
After passing through this modulated solenoid valve, the continually interrupted pressure is in the form of a pulsed flow. When the peaks level off with the troughs there is a resulting overall steady reduced pressure. The level of this pressure is adjusted by varying the on/off intervals. Most often the length of the on time is adjusted and the number of on/off pulses per second is kept constant. The usual rate is around 50 cycles per second.
The resulting adjusted output pressure is therefore delivered as a fluctuating stream. The system incorporates an expansion chamber as a smoothing element, which works as a sort of cushion. This device is usually in the form of a cylinder and piston or diaphragm, backed by a coil spring. In the SVX system the component is described as a Pressure Modifier Accumulator. The high pressure peaks in the stream press the piston outwards and become rounded off, while the low pressure troughs are filled in as a result of the piston moving inwards under spring pressure. The end result is a smoother level of pressure, such that controlled devices are not materially affected.
An increase in the volume controlled is achieved by transferring the solenoid regulated pressure to a pressure modifier valve and a regulator valve.
It should be clear that by “chopping” the fluid supply in an adjustable way, pressure control is achieved economically using a simple poppet type solenoid valve, with few mechanical or electrical complications. However the valve remains in a continuos cycling mode, which can impose rather arduous mechanical stresses.
THE DROPPING RESISTOR CIRCUIT.
It will be immediately apparent that a sudden on off cycle tends to cause what could be called a hammering of the valve seat, even though this is largely checked by the controlled fluid flow. The dropping resistor introduces a second series of current pulses, applied in parallel with the control signal. These shorter pulses are applied during the off cycles and timed to check the travel of the armature as it reaches the closed position, thus reducing both shock and noise.
These secondary parallel signals in effect “rounds off”, the closing period and reduces the closing shock. This arrangement can if required, be made even more sophisticated and configured so as to soften the the opening cycle, as well as the closing of the valve.
It will be appreciated that reducing the resistance in the circuit, or opening the circuit by omitting the resistor, has two outcomes. Firstly the relative on time is increased thus increasing the line pressure. Importantly as a second issue, increased shock loads are applied to the valve.
SOLENOID C
The same principals apply, but the duty is less arduous and therefore no parallel circuit is incorporated.
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