Anyone identify this part of ignition system?

[rcx132]

Finally got round to the engine on my restoration project.
Does anyone recognise the part marked in red on the attached schematic. Seems to contain a capacitor and is the zig-zag line an inductor?

 

[voipio]

Capacitor AKA condenser and ballast resistor?

 

[Gareth_16V]

Where does the other end of the Br (brown?) wire go? Looks like a resistor and a capacitor, which would be some kind of smoothing pulse/voltage circuit? Does it run a rev counter?

 

[MoreWellie]

zigzag will most likely be a resistor, it looks like some sort of shaping circuit to extract ignition pulses for the ecu or possibly a rev counter

The capacitor goes to ground so the circuit is trying to remove some of the higher frequency component

 

[voipio]

The capacitor probably forms a tuned circuit with the ignition coil inductance, resulting in a series of sparks at the plugs, that are more effective than a single spark. It also reduces sparking at the contact breaker points, increasing the life of this part.

 

[MCKDAVID]

How many modern vehicles (less than 30 years old?) have contact points? They are all electronically triggered - generally by a Hall Effect device - these days or controlled by the ecu.

Might be good to know what vehicle it is? I see it is fitted with a carburettor? That likely dates a 4 cylinder engine.

just a guess, but I'd suppose it's the restoration project in his signature line,

"Current project: Suzuki Samurai restoration (4x4 trials/fun/race buggy project on hold for now)"

 

[eddie49]

zigzag will most likely be a resistor, it looks like some sort of shaping circuit to extract ignition pulses for the ecu or possibly a rev counter
The capacitor goes to ground so the circuit is trying to remove some of the higher frequency component

The following diagram, from a Suzuki Samurai forum, confirms that it is a filter for the ECU and the rev counter:

 

[rcx132]

Thanks all, yes it's my 1989 Suzuki Samurai. Mine doesn't have this part, which confused me when I was diagnosing the ignition, but it sounds like that's because my model doesn't have a rev-meter.

Thank you all, you've helped me on my way.

 

[Brad93]

It's a filter.