DIYbanter - View Single Post - Snow Cover On Roof Provides Wind Protection?

Doug Miller

In article , wrote:
On Mar 4, 11:14=A0am, (Doug Miller) wrote:
In article , Jim Yanik j=
wrote:
(Doug Miller) wrote in
:

In article ,
wrote:

If you are talking a diesel you are correct. On gasoline engines both
air and fuel must be regulated TOGETHER. Either fuel is shut OFF or
the throttle (air control) needs to be closed in concert with the
reduced fuel flow.

They have to be regulated together *under normal conditions* in order
to maintain emission standards. That obviously isn't important in an
emergency. Reduce the fuel flow to a trickle, and the engine *will*
slow down, regardless of what happens to the airflow. Under runaway
acceleration, the primary consideration -- indeed, the only
consideration -- is the need to get the car stopped. Any damage that
may or may not occur to the engine or the cat is of comparatively
little importance.

OK,now tell us HOW you propose to "reduce fuel flow" other than adding m=
ore
code to the existing computer programming,which you deny advocating.

The only point under discussion in *this* subthread is whether it's neces=
sary
to stop, or merely reduce, the flow of fuel in order to stop runaway
acceleration.

Do try to keep up.- Hide quoted text -

- Show quoted text -

Again, taking things in context, the whole point of reducing or
cutting off fuel flow was to implement a safety to stop a runaway
car. To which you posted:

"To stop runaway acceleration it is not necessary to cut off the flow
of fuel.
Reducing fuel flow to idle levels is more than sufficient. The engine
computer
controls the flow of fuel to the injectors. For the engine computer to
reduce
this flow to idle levels does not require any movement of any
mechanical
linkage."

In which case, what's the point if you're arguing about doing it
through the same computer that already regulates the fuel injection
and it's undergoing runaway acceleration? I thought the presumption
here was a failsafe to cutoff the engine. Clearly, what you need is
an entirely seperate cuttoff system. Talking about reducing it to
idle is spurious, because the computer that is already managing the
fuel flow is presumed to have faulted and is commanding full
acceleration. So, how is it now suddenly going to go back to a nice
idle?

Are you and Yanik related?

*This* subthread originated from the contention by some fool that trying to
stop runaway acceleration by shutting off the flow of fuel was a bad idea
because it would supposedly damage the engine. I simply pointed out that it's
not necessary to shut it off completely in order to stop runaway acceleration.