Author Topic: Ignition cut governor  (Read 911 times)

Offline cheepo45

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Ignition cut governor
« on: December 28, 2018, 10:17:44 PM »
I have been having trouble regulating the speed of my Jan Ridders 2 stroke engine, so I came up with a simple Ignition cut mechanism.
 It is a centrifugal weight that moves the magnet that triggers the hall sensor away from the sensor as the rpm increases. It works well.
It took some experimentation with different return springs to get it to work properly, but as you can see in the video it works well.
I now have a hit and miss 2 stroke!

Offline gbritnell

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Re: Ignition cut governor
« Reply #1 on: December 28, 2018, 10:25:04 PM »
Pretty neat! It's amazing that it will coast over the compression stroke. With a 4 cycle hit and miss you're not fighting the compression.
Good job!
gbritnell
Talent unshared is talent wasted.

Offline cheepo45

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Re: Ignition cut governor
« Reply #2 on: December 28, 2018, 10:28:41 PM »
Thanks!
The heavy flywheel helps.
  Scott

Online crueby

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Re: Ignition cut governor
« Reply #3 on: December 28, 2018, 10:39:36 PM »
Very cool!


I had a hit and miss car once when there was a broken wire to one cylinder, not quite the same thing, yours is much better!


 :ThumbsUp:

Offline Dave Otto

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Re: Ignition cut governor
« Reply #4 on: December 29, 2018, 12:39:44 AM »
Nice!
I think that is the way the old Maytag singles are governed.

Dave

Offline cheepo45

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Re: Ignition cut governor
« Reply #5 on: December 29, 2018, 02:33:55 AM »
I have heard of the Maytag governors, but I was unable to find any information on how they worked.
I assume it was something similar. Things were pretty basic back then. Some older european cars have a similar setup on the distributor rotor that grounds the ignition to limit the rpm's.
I did look in to electronic circuits (rev limiters), but the cost was pretty high.
I'm always happy when my strange ideas work!
 Scott

Online b.lindsey

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Re: Ignition cut governor
« Reply #6 on: December 29, 2018, 03:48:41 AM »
A very clever and effective solution for sure. Great sounding engine too.

Bill

Offline yogi

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Re: Ignition cut governor
« Reply #7 on: December 29, 2018, 02:04:05 PM »
Runs great! Well done!  :ThumbsUp: :ThumbsUp: :ThumbsUp:

Offline Roger B

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Re: Ignition cut governor
« Reply #8 on: December 29, 2018, 03:43:53 PM »
A good runner and a very effective solution  :praise2:  :praise2:

It tended not to used on larger engines as fuel was still consumed on the miss strokes however as was mentioned earlier my brother's Rover 2000 TC had a rotor arm with a built in short circuit system as an ultimate rev limiter.
Best regards

Roger