Re: Car Alternator as Human Powered Generator

From: Rich.Andrews (spmaway_at_ylhoo.com)
Date: 06/02/04 

Date: Wed, 02 Jun 2004 03:25:00 -0000

"Mjolinor" <mjolinor@hotmail.com> wrote in
news:CjZuc.51$oj.50@newsfe2-win:

>
> "Rich Grise" <null@example.net> wrote in message
> news:I0Uuc.24965$g15.17948@nwrddc02.gnilink.net...
>> "Rich.Andrews" <spmaway@ylhoo.com> wrote in message
>> > "Mjolinor" <mjolinor@hotmail.com> wrote in
>> > >> Power is greatly diminished for a variety of reasons when the
>> > >> engine
> is
>> > >> running backwards. The injectors running backwards? Many
>> > >> injectors are operated by a cam and pushrod.
>> > >> Here is a diagram that shows the 2 cycle diesel engine in action.
>> > >> http://www.marinediesels.co.uk/
>> > > That moving diagram is wrong. An engine like that wouldn't run
>> > > unless there is a supercharger on it providing greater than
>> > > atmoshperic pressure in the crankcase. The primary inlet should be
>> > > closed by some means as the piston starts to descend.
>> > You are correct. But since every Detroit Diesel engine has a
> supercharger
>> > aka blower, that resolves that issue.
>> Well, the presence of a blower would make it a little hard to run it
>> backwards, wouldn't it? It'd make it a sucker, as it were.
>
> If it were a crank driven supercharger it would but if it were a turbo
> charger it wouldn't I've never seen one of these "American" engines so I
> don't know what they have.
>
>

Found this website.

http://www.exploroz.com/Forum/Archive/2004_2/12005.asp

"Davoe asked for information on can a diesal start in reverse?
The question
On the w/end I went to go up a short steep rock formation without enough
momentum (high range as well) and the old girl started choking I waited
for it to stall but I was to slow on the brakes and it rolled back a
couple of chugs which surprised me as usually the compression holds it.
Any way I braked and clutched and the motor was firing and not sounding
right high rpm and generally sounding different so I turned it off and
restarted and made the obsticle ok. I didnt think modern motors (2h
modern?) would start in reverse is it possible?

Reply 1 of 7 posted 13 Apr 2004

Member -Bob & Lex (Sydney) replied to the question

Yes it's possible or you could'nt do a hill start in reverse as I was
show'n at driver training. FollowUp 1 of 3 posted 13 Apr 2004
Goran posted this followup
You are kidding, right? When you do a hill start your motor is still
running in the same direction forward or reverse. You transmision decides
the rest. Bloke above is saying his motor fired up bacwards( wrong
direction). I don't know if it is possible with modern motors. FollowUp 2
of 3 posted 13 Apr 2004 Wayne (NSW) posted this followup
Bob, The way I read the question is, Will a diesel start and run in the
opposite direction . The motor can sometimes run backwards, exhaust out
the snorkel and air up the exhaust. Wayne FollowUp 3 of 3 posted 13 Apr
2004 Member -Bob & Lex (Sydney) posted this followup
looks like I read the question wrong.
Reply 2 of 7 posted 13 Apr 2004

Wayne (NSW) replied to the question

Davoe, Yes they can start and run in reverse. Black smoke comes out of the
snorkel and air is sucked up the exhaust pipe. If the motor does not run
for long than I don't think any damage was done. It happened to a mate of
mine a long time ago doing the same type of rock climbing. I don't know if
you would call a 2H a motor, but it is almost bullet proof. Wayne Reply 3
of 7 posted 13 Apr 2004

Willem replied to the question

A long time ago on a construction site we were running one of those Euclid
Scraper Machines. I could be wrong but I think that they were two stroke
diesels. Stalled the machine on a steep slope and released the clutch as
it ran backwards and it fired up in reverse. Then we had 6 gears in
reverse and one forward. Quite funny. Had to crawl up to the top of the
incline and then shut everything down and start again. FollowUp 1 of 1
posted 13 Apr 2004 Truckster (Vic) posted this followup
Yup 2 strokes were very famous for it back in the 70's and early 80s...

r 

-- 
Nothing beats the bandwidth of a station wagon filled with DLT tapes.

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