NGK GLOW PLUGS

EXTREME RESISTIVITY

Metal rod glow plugs are equipped with a heating coil in a glow rod made of heat-resistant metal. A specific material – magnesium oxide – in the interior of this glow rod protects the heating coil from vibrations and shocks. As magnesium oxide is also an outstanding thermal conductor, the heat that is produced can quickly be dissipated outward. Metal rod glow plugs can be allocated into three main groups: standard rod glow plugs, self-regulating rod glow plugs, and AQGS rod glow plugs.

The ceramic high-temperature glow plug (“NHTC glow plug”, “New High Temperature Ceramic”) has a fully ceramic heating element. The NHTC ceramic glow plug was specially developed by Niterra to enable automotive manufacturers to comply with ever-stricter emissions standards. One of the goals of these standards is to reduce the compression ratio in diesel engines. NHTC glow plugs reach a temperature of 1,000°C in less than two seconds and can after-glow for more than ten minutes at temperatures of up to 1,350°C.

Glow plugs support reliable ignition conditions and efficient combustion in diesel engines. Principally, they are used in ignition, receiving electrical energy and heating up to very high temperatures. They generate the temperature boost that diesel engines need to start, especially in cold conditions.
In normal temperatures, ambient air is drawn into the engine cylinders and then compressed to reach around 900°C. When the fuel is then injected, it ignites spontaneously. However, in winter, conditions for successful ignition become more difficult. The cold cylinder walls, pistons and valves try to extract heat from the cold intake air, and as a result the necessary combustion temperature is not achieved. Extra heat is needed – and that is where the glow plug comes into play. As soon as a current is supplied, the engine’s glow plugs heat up. This provides the extra heat needed for stable combustion. Once the engine is running, the glow plugs either return to being idle or continue to work, depending on their type.

This depends on a variety of factors. An average estimate is around 160,000km but service life can vary depending on product quality, engine condition, operating conditions and maintenance. NGK glow plugs are designed for long service life and performance 

NGK ignition leads provide reliable insulation, a high level of resistance of up to 200°C and resistance to vibrations and fluctuations in temperature and humidity. NGK ignition leads are designed to maintain consistent performance under demanding conditions and over extended periods of use.