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KC

On 1/17/2015 11:27 AM, wrote:
On Sat, 17 Jan 2015 10:06:02 -0500, KC wrote:

Back in the 80's when we were discussing this we assumed by now there
would be no starters... The computer would just fire the next cylinder
in line is how we thought it would work...

How would that work? To start an engine you need fuel, air, spark and
compression. If the car had sat more than a minute, there would be no
compression and most injected engines cut the fuel off before the
engine stops spinning these days to mitigate "making oil" so the "next
cylinder" would be dry.

We weren't sure how it was gonna' work, that's why we are not rich

I
am just telling you where the industry was back then in the beginning of
computer controlled cars...

KC

On 1/17/2015 7:14 PM, wrote:
On Sat, 17 Jan 2015 13:42:37 -0500, KC wrote:

On 1/17/2015 11:27 AM, wrote:
On Sat, 17 Jan 2015 10:06:02 -0500, KC wrote:

Back in the 80's when we were discussing this we assumed by now there
would be no starters... The computer would just fire the next cylinder
in line is how we thought it would work...

How would that work? To start an engine you need fuel, air, spark and
compression. If the car had sat more than a minute, there would be no
compression and most injected engines cut the fuel off before the
engine stops spinning these days to mitigate "making oil" so the "next
cylinder" would be dry.

We weren't sure how it was gonna' work, that's why we are not rich I
am just telling you where the industry was back then in the beginning of
computer controlled cars..

If you could get a properly mixed and compressed charge in a cylinder
or two, it would work. Some old airplanes (maybe even newer ones) used
to use a shotgun shell like charge to kick them over..

Maybe only one cylinder is fitted with a seperate injector and when the
engine stops a small electric motor turns it to that cylinder just
slightly past TDC. Inject pressurized mix, and fire it?

I think the biggest problem though with that might be building that
pressure in the cylinder without compressing it with the cylinder itself.

Then I think of the problem of getting enough out of that one boom to
move the next cylinder compressed when you consider the opposing force
of the fly wheel, etc...

So then I think of our Suzuki 250 which has a centrifugal compression
release. There is a part in the exhaust cam that holds the exhaust port
open till the rpms come up enough to close it off. That makes it so a
105 pound girl can consistently start a 250 cc, one cylinder, 4 stroke.

Yeah, I am sure all of these have been considered but all in all,
personally I think the old starter, solenoid, alternator and battery do
a great job and are a lot simpler to work on that any of the other
setups we may be considering here....

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