Den 13-02-2013 03:13, skrev:
On Tue, 12 Feb 2013 22:39:21 +0100, Uffe Bærentsen
wrote:

Maybe that is the case with US starters.
However the vast majority of European an Japanese starters today use a
combination of both solenoid/pre-engage and Bendix.
The starter drive on a Nippondenso geared starter LOOKS like a Bendix,
but what the helix does is turns the gear as it engages to prevent the
teeth from butting. This is accomplished on a direct drive starter
by the current flowing through the pull-in coil of the solenoid which
starts the armature turning as the gear is pre-engaged. The starter
does not start to crank under full power untill the gear is virtually
fully engaged.

Please don't tell this to the ****load of starters that go through my
workplace every day or I will get into big trouble.


On a reduction starter this system cannot be used . The motor is
geared very highly to the drive, so it would need to spin faster than
the current through the pull-in coil could turn it to assure the gear
turned enoug to avoid the teeth butting.

It IS used on many gearreduction starters.


I recieved Toyota factory training on the Nippondenso geared starter
when it ws first introduced on the 4M engine in the 1972 1/2 Mark 2
Corona and it was very well explained at that time. The information is
actually available on line - oh the joys of the internet - at
http://www.autoshop101.com/forms/h7.pdf.

So, as you can see, although it looks like a duck, it does't exactly
quack or crap like a duck.

Ducks comes in a lot of sizes and colours ;-)



--
Uffe