It's not only hybrids. Most BMWs I've driven in the last 5 years or so do
it too. Especially the small engined ones. Just a geared starter and
engine that's very easy to crank when the valve timing is adjusted for
starting.
On Tuesday, July 23, 2013, Gary Winblad wrote:
> Hi Jay,
> Auto stop (shutdown) is probably the single thing that lets hybrids achieve
> their great city mileage.
> It is amazing how much gas it saves.
> There are several schemes that I know of...
> The Honda hybrids like my old Insight have a pancake motor attached to the
> flywheel run by the
> 144V hybrid battery. No wear at all. As an emergency backup, the Hondas
> also
> have a
> conventional 12V ring geared starter.. never used until the hybrid battery
> goes bad!
> The Prius has the engine connected to a planetary gearbox along with 2
> electric motors. This
> replaces the tranny, clutch, starter motor, generator and probably more I
> forgot! The engine
> starts from road motion after it starts going on electric power. Nothing
> to
> wear.
> The GM light hybrids replace the alternator with a bigger alternator/motor
> belt driven to the
> engine. Nothing to wear. Battery is something like 36V...
> Probably the most elegant solution is the Mazda. It stops the engine on a
> compressed stroke
> ready for a spark to start it back up. As in most schemes, electronic
> control
> is really the key!
> And as far as I know, as someone else pointed out, only the british (in
> modern
> times) have
> jammed starter problems ;-)
> Gary
> ----- Original Message ----- From: Jay Laifman
> <jay.laifman@gmail.com<javascript:;>
> >
> To: Tiger's Den <tigers@autox.team.net <javascript:;>> Sent: Tue, 23 Jul
> 2013 15:18:10 -0000
> (UTC) Subject: [Tigers] OFF TOPIC - modern starters and clutches You
> have
> been warned that this is off topic. So delete now if you'd be offended by
> non-Tiger emails. There are two things about today's cars that has been
> baffling me. The first is the cars that shut down rather than idle. How
> the
> heck do starters and flywheel gears last from that overload of use? And, I
> thought starting a car is the biggest drain on the battery. How does the
> alternatory and battery keep up? I mean, if I turned off the Tiger at
> every
> stoplight and in traffic, I'm not sure my starter, battery or car would
> make
> it to the destination. [ok, see, some Tiger content] The next is the
> clutchless manual transmissions. I think the dual clutch/dual main shafts
> is
> genius, really genius - so simple, yet such a difference. But, how do
> those
> cars inch along in stop and go traffic and not destroy the clutch in a
> single
> day's drive? Any ideas? Jay
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