BMW’s i8 combines an electric engine with 96 kW (131 PS) and the first BMW three-cylinder direct injection engine produced for passenger cars. The downsizing engine delivers 170 kW (231 PS) with a capacity of 1.5 litres. Altogether, the BWW i8 offers a total output of 266 kW (362 PS) and a maximum speed electronically throttled to 250 km/h. It can go from zero to one hundred in just 4.4 seconds.
The TwinPower turbo three-cylinder works with variable valve control, turbo charging and high-precision direct injection close to the spark plug. The spark plugs therefore need to fulfil demanding requirements: They have to guarantee high mixture accessibility and reliable ignition in the face of high charging pressures and strong air-fuel mixture movements.
NGK Spark Plug, the world’s leading manufacturer of spark plugs, exclusively supplies BMW with the plugs for the car. For the 1.5-litre direct injection engine, NGK developed the SILZKGR8C8S, a M12 bi-hex double precious metal spark plug with an iridium tip on the centre electrode and a platinum chip on the ground electrode. These precious metal electrodes are virtually resistant to spark erosion and hot gas corrosion. They safeguard optimum ignition conditions over many kilometres. Additionally, a special electrode design improves the mixture accessibility and, with this, the efficiency of combustion. Finally, the spark plug comes with a lengthened insulator and a cup-shaped terminal. This design effectively prevents flashovers and breakdowns even at extreme ignition voltages.
About NGK: NGK is the world’s leading manufacturer of spark plugs, glow plugs and lambda sensors. The Company runs production plants and sales organisations all over the world. With a total of 12,000 employees, the Company generates an annual turnover of around 2.7 billion euros. NGK is represented on all continents and has 32 group companies, 12 production plants and four technical centres.
About NGK: NGK is the world’s leading manufacturer of spark plugs, glow plugs and lambda sensors. The Company runs production plants and sales organisations all over the world. With a total of 13,000 employees, the Company generates an annual turnover of around 2.7 billion euros. NGK is represented on all continents and has 43 group companies, 24 production plants and 5 technical centres.
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