Ceramic for a good reason
Particularly robust
through the design developed by Bosch
Reduced risk of breakage
due to the shape of the heating element and its seat in a protective tube
Heat resistance and durability
through ceramic heating technology
Fast and safe cold start
due to low voltage
Comfortable, fuel-saving engine running
due to post-glow function
DuraSpeed glow plugs from Bosch rely on highly heat-resistant ceramic – the same material used by NASA for heat protection in spacecraft. Ideal for rapid temperature changes and extreme conditions.
Glow plugs not only provide starting assistance in diesel engines. They also have to post glow, i.e. be active when the engine is running. In this way, they ensure that the engine runs efficiently and fuel-efficiently even during stop-and-go and in city traffic.
Diesel particulate filters remove soot particles from the exhaust gases to prevent clogging. Modern glow plugs play a decisive role in this by supporting the heating of the filter through regeneration glow.
Many vehicles worldwide are equipped with diesel technology from Bosch. Thanks to the perfectly matched components, such as Bosch glow plugs and injectors, fast engine startability and optimum engine performance are guaranteed.
The heart of the glow plug is the heating unit. Its special manufacturing process makes it possible to reach temperatures of over 1,000 degrees Celsius.
The heating unit of the glow plug is formed in several steps to achieve the specific diameters and lengths required by the customer.
The heating element is connected to the housing with a precisely controlled press fit. This supports the reliable function of the glow plug throughout its entire service life.
The heating unit is protected against corrosion with an O-ring. An insulator is fitted to enable the glow plug to glow.
The finished glow plugs are subjected to comprehensive functional tests:
Replace glow plug set completely:
Diesel engines were originally only used as stationary engines. Robert Bosch recognized their high efficiency for motor vehicles early on, but they had great difficulty starting when cold. Operators had to preheat the engines with hot bulbs, soldering torches or open fires. In 1922, Bosch launched the first glow plug for heavy oil engines, which shifted the preheating to the inside of the combustion chamber. Today, Bosch glow plugs enable a cold start in under two seconds.
Historic and modern glow plugs have evolved considerably. In the past, simple components were used; today, glow tubes protect the heating coil from combustion gases and ensure mechanical stability. Modern glow plugs are designed for on-board voltage, which makes series resistors obsolete. New technologies such as the dual-coil design have further improved efficiency.
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