DESCRIPTION:
Item: Spark Plug
OEM Part#:IK20TT
Condition: New
Iridium and Platinum technologies combine with 360-degree laser welding process to create a plug with a lifetime over 100,000 miles. TT or Twin-Tip technology promotes spark energy concentration and explosion, which translates into improved acceleration and economy. Iridium TT feature the world’s smallest 0.4mm Iridium center electrode and 0.7mm needle tip ground electrode, which minimize spark interference and maximize ignitability, resulting in better power, torque and fuel economy. patented Iridium Alloy has the highest Iridium concentration, making it more durable and producing a dramatic improvement in spark plug life.
- Machine rolled threads prevent seizing or cross threading during installation and removal
- 100% pre-fired to assure the highest quality possible
- Purified alumina powder insulator provides exceptional strength and thermal conductivity
- Five rib insulator prevents flashover
- Copper-glass seal bonds center electrode and insulator for a gas-tight seal
Please make sure our part number matches your old one, same part number, then same fitment.
Package include:
6 x Spark Plug IK20TT
Structure
We has started to sell IRIDIUM TT spark plugs having a φ0.4 mm iridium alloy center electrode and a 0.7 mm needle-type platinum alloy ground electrode.
The quenching effect has been decreased by forming the electrode into a double needle shape. As a result, the flame kernel rapidly develops and the engine's power is drawn out to its maximum potential.
1.Built-in, Highly Reliable Resistor
All specification types include an embedded, highly reliable, monolithic resistor to eliminate electoromagnetic noise interference from all kinds of electronic devices.
2.360° Laser Welding
The iridium tip is mounted with an "All-around Laser Welding" method that insures high reliability even under the most severe driving conditions.
3.φ0.7mm Needle-Shaped Platinum Ground Electrode
In order to maximally prevent quenching effect, the ground electrode needs to be made as small as possible. Traditional ground electrodes could not be made too small without reducing groundig strength or increasing electrode wear.
However, we've managed to attach a fine 0.7mm-diameter platinum electrode using a 360° laser welding technique.
4.φ0.4mm Ultra-fine Iridium Center Electrode
Using exclusive iridium alloy having a very high melting point, the tip of the center electrode can be shaped very thin and fine, reducing spark voltage requirements and greatly improving ignitability.
Flame Growth
The photograph shows flame reflected by the variation in density. Fig. 1 shows the results of studying the influence of electrode shape on flame growth, using the Iridium Spark Plug and IRIDIUM TT.
The photographs indicate that, in the case of the Iridium Spark Plug, the size reduction of the gap (from 1.1 mm to 0.6 mm) interfered with flame growth, while in the case of IRIDIUM TT, flame growth was ample and greater than that of the Iridium Spark Plug in spite of the narrowed spark gap (0.6 mm). These observations show that, as the results of the ignition/firing simulation indicated, a fine ground electrode can reduce required voltage because it enables the spark gap to be narrower, while realizing higher ignitability than the Iridium Spark Plug.
Advantages of Fine Ground Electrodes
To lower the required voltage and improve firing performance. The most advanced technology in the world has been employed to enable use of electrode, at 0.4 mm in diameter, in the IRIDIUM TT.
The smaller the electrode the more concentrated the electric potential at the tip of the electrode and the stronger the electric field that affects required voltage and the lower the required voltage. As a result, combustion is good for all types of driving, the engine starts easily, and acceleration improves.
The above shows the strength of electrical field in case certain voltage changes on Iridium plug and IRIDIUM TT.
The more electrical field strength is getting high, the more it becomes easy to fire with low voltage.
*1 FEM(Finite Element Method analysis): General method to measure electrical field strength.
Higher Ignitability
Fig. 3 shows the results of evaluating how the miniaturized-portion protrusion direction may influence the ignitability of an engine. The evaluation checked idle speed at equal throttle opening with the ISC (idle speed control) turned off. A higher idle speed represents higher ignitability.
This figure shows the results of evaluating IRIDIUM TT. This figure shows that IRIDIUM TT are superior to the Iridium Spark Plugs in ignitability.
Better fuel efficiency
Fig. 4 shows the results of the examination of combustion variation and fuel consumption, using a 1,800-cc, four-cylinder engine. The evaluation was conducted by turning on the ISC and setting the average engine speed to 800 rpm (idling). The previously specified Type-1 of the IRIDIUM TT was used in this examination. Pmi COV (coefficient of variation) in the diagraph shows fluctuation in IMEP (indicated mean effective pressure). As this figure shows, IRIDIUM TT can reduce the Pmi COV approximately 3.1% and accordingly reduce fuel consumption by 2.4%, compared with the Iridium Spark Plug. These advantages are achieved because the miniaturization of the ground electrode enables better ignitability, improving combustion efficiency. Because the IRIDIUM TT is low in combustion variation and enables a reduction in idling speed, further improvement can be expected in fuel efficiency.
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