IDI –Inductive Discharge Ignition:
Inductors and Capacitors are the important components in modern ignition systems. Most manufacturers choose digital CDI – Capacitor Discharge Ignition system but TVS has opted for IDI – Induction Discharge Ignition system. Earlier manufactures moved to CDI from IDI because of the following problem with IDI. IDI are driven off points which trigger a coil that sends a charge to the spark plug. However, they require exact points and plug gap settings. This drawback made many manufacturers to move to CDI. Capacitors in CDI recharge quickly and hence deliver multiple spark at low rpm or strong till 10000 rpm. The CDI has its own drawback i.e. CDI sparks are extremely short in duration and the amount of energy that can be delivered is also limited unlike the IDI which can deliver longer spark. TVS has opted refined IDI for its apache – employs a variation, micro controller circuit triggers the coil depending on the crank position without needing points. In the process, it generates a 1200 micro seconds (200 -250 micro seconds in other bikes) long spark with 60 milli Joules of energy as seen on some Royal Enfield bikes. Thus with the refined IDI TVS claims apache engine sparks twice as fat and last six times longer than its counterparts. This ensures better combustion (by burning lean mixtures) which means quick response from your apache when you accelerate your apache.
IE surge – Intake Exhaust Resonator:
The second most important technology which powers the Apache is IE surge – the decals (letterings) are nicely placed on the side panels of the Apache. IE surge is nothing but Intake and Exhaust resonator for strong 3500 – 5500 rpm thrust and by this you can reap the benefits of running a large diameter intake and exhaust headers without losing the associated part – throttle response issues. Intake resonator helps to improve the response of the bike. Connected to the air box, the resonator is basically a box which stores air, and then rushes the air to the combustion chamber when the throttle is suddenly opened cutting the ignition lag significantly. Exhaust resonator works like the exhaus-TEC (Torque Expansion Chamber) on Bajaj bikes. Exhaust resonance chamber is fitted on the tuned exhaust to enhance power delivery in the lower reaches of the power band. This technology is to use the exhaust energy thereby ensuring that sufficient levels of torque is available at low engine rpm levels and is optimized to provide torque distribution in the mid and higher range rpm levels.
Next time when you push your apache I believe you can understand what it has!