> An advanced new form of idle-stop system
> To achieve ever-lower carbon-dioxide emissions from its engines, Mazda
> constantly
> develops and refines technologies that enhance fuel efficiency. Among
such
> engine-related technologies are idle-stop systems. An idle-stop system
saves
> fuel by
> automatically shutting down the engine when the driver brings the vehicle
to
> a halt
> (at traffic lights, for example) and automatically restarting the engine
> when the
> driver subsequently wishes to pull away.
> A conventional idle-stop system uses an electric motor to restart the
> engine.
> However, Mazda recently devised a new, more efficient means of performing
> this
> function. Known as the Smart Idling Stop System, it injects fuel directly
> into the
> engine's cylinders while the engine is stationary and ignites the fuel to
> create
> downward piston force that serves to start the engine.
> The direct-injection-based Smart Idling Stop System not only saves fuel;
> since it
> does not use an electric motor, but it also restarts the engine more
quickly
> and
> quietly than a conventional idle-stop system.
>
> Technologies and benefits of the Smart Idling Stop System
>
> Reverse engine operation for restart
> Direct-injection technology makes it possible for fuel to be supplied
> directly to the
> engine's cylinders while the engine is stationary and then ignited to
turn
> the engine
> over. However, since the cylinders soon return to atmospheric pressure
when
> the
> engine stops a special technique is needed to achieve enough expansion
> energy to
> restart the engine. Consequently, the Smart Idling Stop System operates
as
> follows:
> First, the system injects a small amount of fuel into the cylinder whose
> piston is
> part-way through its compression stroke. The system ignites this small
> amount of
> fuel, causing the engine to run slightly in reverse. Then, the system
> injects fuel
> into the cylinder that has begun to undergo compression owing to the
> engine's reverse
> operation. Finally, the system ignites the latterly injected fuel,
causing
> powerful
> expansion that drives the engine in the forward direction, thereby
starting
> the engine.
>
> Piston-position control during engine shutdown
> For the engine to be startable through the aforementioned reverse
operation,
> it's
> vital for the compression-stroke piston and expansion-stroke piston to be
> stopped in
> positions that create the right balance of air volumes. Consequently, the
> Smart
> Idling Stop System effects precise control over the piston positions
during
> engine
> shutdown.
>
> Benefits of the Smart Idling Stop System
> The Smart Idling Stop System realizes the same main benefit as a
> conventional
> idle-stop system, i.e., superior fuel efficiency. But, since it starts
the
> engine by
> means of combustion rather than using an electric starter motor, it's
> quicker and
> quieter than a conventional idle-stop system. Also, the absence of a
starter
> motor
> makes the Smart Idling Stop System structurally simple. Consequently, the
> system has
> the reliability needed for frequent engine restarts.
>
> Hisakazu Imaki
> Representative Director, President and CEO


> I assume this will be applied to the DI rotary engine. I see no reason
> why not.
>
> Paul Lamar ....No rotor no motor.



BACK TO THE MODEL "T" FORD.

VRR

In what way? As I recall one had to hand crank the Model T

Paul Lamar ...No rotor no motor.

We found out that if you choked the engine before shut down,AND if a
piston stopped somewhere shortly after top dead center, when you turned
the coils on (they were the buzzer type) the plug would fire and start
the engine. Seemed like magic to onlookers, and a lot better than
cranking.
vrr

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