Power Transmission
“PACKAGED”
To Suit Your Needs
Worm Gear Motors and Worm Gear Reducers
• Modular design with ISO standard flanged input together with output
flanges, torque arms, plus simple connection of multiple staged
reductions
• 100% compatible with ISO flange mounted motors
• Lightweight aluminium design
• Available in 10 sizes with power ratings .09kW - 15kW and ratios of
7.5:1 to 6,400:1
RR Fisher & Co Ltd
PO Box 23293 Auckland
Auckland
Ph: 09 278 4059 Fax: 09 279 8286
Christchurch
Ph: 03 377 0025 Fax: 03 377 0086
EN082
www.vikingltd.co.nz
www.vikingltd.co.nz
151b McLeod Rd, Te Atatu South 0610, Auckland, NZ. Ph 09 835 4090, Fax 09 835 4070
151b McLeod Rd, Te Atatu South 0610, Auckland, NZ. Ph 09 835 4090, Fax 09 835 4070
REN074
Variable valve
timing is nothing
new. It's been
obvious to
manufacturers
for decades
that the optimal valve operation is
different when the engine's doing
different things, and that changing
the timing, lift and duration of the
valve events on an engine to suit
different scenarios can result
in power, torque, efficiency and
emissions advantages. What makes
Camcon's system different is that
it allows complete, instant and
unrestricted control over exactly
what any intake or exhaust valve
is doing, at any time, regardless
of what the engine itself is doing.
That's because Camcon's IVA
(Intelligent Valve Actuation)
system is fully electronic, with no
mechanical attachment to the
crankshaft.
There are no timing belts or valve
springs, with each valve getting its
own miniature camshaft, complete
with a desmodromic system that
opens and closes the valves
precisely and mechanically. And
instead of being driven off the
crank, each valve's camshaft is
controlled by an electric motor.
These motors can rotate either way
with total precision, and for a given
valve event they can rotate through
fully to give 100% of the available
valve lift, or they can stop part-way
through and return back to closed,
so you can get literally any degree
of valve lift you want, at any time.
There's a video at the bottom of
the page to give you a better visual
explanation. The system knows
the position of the crankshaft at all
times thanks to a rotary position
sensor – in fact, the whole system
runs under real-time, closed-loop
control, so that valve events are
timed perfectly against what the
motor's doing.
"What that means," says Camcon
coo Mark Gostick "is we can give
the engine exactly what it wants at
low revs, and exactly what it wants
at higher revs, and anywhere in
between, and you don't have to
compromise at all. You can change
timing, you can change duration,
you can change lift, you can even
shape the events if you want. You
can do double events. You can
change the profile of your camshaft
between one event and the next.
You can go from your idle setting
to 100 percent throttle in one
revolution. You can do pretty much
anything. You've got what we like to
call a digital crankshaft."
www.engineeringnews.co.nz 47
/www.vikingltd.co.nz
/www.vikingltd.co.nz
/www.engineeringnews.co.nz