Sun Apr 20 12:41:53 1997 - Message No. 659
From: =?iso-8859-1?Q?J=F6rg?= =?iso-8859-1?Q?_?= =?iso-8859-1?Q?J=FCnger?=

Subject: Re: Das ewige Thema, the time relais etc.


Hi guys,
i have a few questons and statements concerning this new part.

>Has anybody heard of this Honda solution before, or is Oostmann the first?

I talked to my local Honda dealer here in Dachau  but he didn't know
anything about changes in that area at the 97' AT. According to his
knowledge this way of driving the fuel pump is a "relict" from ralley usage
where this electric curcuit makes sure that no fuel gets pump any more
anywhere as soon as the engine stops working (for safety reasons during
crashes etc.).

>>VErgsaserbelueftung ist bei der @ ausenliegend (direct connection of the
>>petrol room of the carb. to outside)

The principle of normal "air conditioning" for the carburator is quite
common even in single cylinder enduros with kick starter only and a lot of
them still start without problems after days or week. The difference there
is that the room in the carburator (Schwimmerkammer) that needs to be
filled wih fuel gets filled automatically as soon as you open the petrol
tap by the pressure of the petrol left in the tank.

>>Also... der ganze "quatsch" mit dem Zeitrelais funktioniert zwar aber ist
>>keine Loesung. Denn einer der Beider Zylinder "saeuft immer ab".

How should that work ? The carburator is a normal type with a room for
petrol (Schwimmerkammer) which gets closed by a valve
(Schwimmerkammernadelventil) a soon as a certain level of petrol is
reached. So the fuel pump will definitly NOT be able to float one of the
cylinders as long as the carburators do operate normally !
I think it is a good idea to try to figure out what is the shortest
possible time for the fuel pump to run up front. This makes sure that the
pump doesn't try to pump more fuel into the carb. when the valve in the
carb. already closed.

Resumee:
In my opinion these two solutions are just two different attempts to solve
the problem.
The first solution by Honda tries to keep as much petrol as possible in the
carb. for a long time to make sure that the @ starts up quickly.

The second solution (time relais) doesn't care about any former
circumstances like diffused petrol or alike it just takes care that enough
petrol is in the carb. up front to make sure the engine starts up quickly.

I personally can't see the disadvantages of the time relais solution apart
from "no parts to buy for it at the Honda dealers".

Note: This is my personal opinion and leveling of arguments. If I'm
definitly wrong give me a note and explanation why.

----------------------------------
Who ever is joining the meeting:

Be aware of the fact that it is snowing down here in Bavaria. The snow does
not last long on the streets but it is very cold and for the Alpes they
recommend winter tyres again ! According to the latest forecasts I heard
about it is supposed to stay that way for nearly the whole week.
So think about arranging with snow on your ride down to Itally. Sorry, but
I'll keep you updated on this item as soon as the weather changes.


Have fun,
JJ

--------------------------------------------------------------
Jörg Jünger

(For systems that don't support "Umlaute": Joerg Juenger)

Private Mail: joerg.juenger@munich.netsurf.de
Mail at work: joerg.juenger@nexus-informatics.de
WWW:          http://homepages.munich.netsurf.de/Joerg.Juenger

Steinkirchen, Germany
N 48 Grad 26,461min, E 11 Grad 27,666min, Datum: WGS84
Voice:  [49](8137) 79 23

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