In the new VW Tiguan BERU ISS ensures an “SI engine-like” key start
In the clean TDI engines of the new SUV, diesel instant start systems from BERU are helping to reduce pollutant emissions and fuel consumption.
(Ludwigsburg, 26 October 2007) The Tiguan from Volkswagen goes into series production in November 2007 featuring a BERU Instant Start System (ISS). The components of the electronically controlled diesel instant start system (glow control unit and high-performance glow plugs) quietly go about their tasks in the newly developed clean TDI engines of the SUV. Even at extremely low temperatures down to minus 25° C they guarantee an “S1 engine-like key start“, stable idle running, clean load assumption and low emissions. The VW Tiguan TDI models with common rail injection thus already meet the Euro 5 standard valid from 2009.
BERU ISS: performance-enhanced glow plugs for a reliable cold start
The primary focus of interest for international engine developers at the present time is optimized combustion processes coupled with lower NOx raw emissions and a significantly lower compression ratio. At the same time, standards of convenience being placed on the cold start process are rising. Additional functions such as intermediate heating and diesel particle filter regeneration heating are leading, moreover, to higher demands on glow plugs.
In developing these sophisticated ISS hi-tech glow plugs BERU was able to reduce heat-up time to 1000°C to a maximum of two seconds compared with conventional self-regulating glow plugs - as well as ensuring even longer life and greater operating safety. ISS glow plugs achieve their extremely short heat-up time and optimized power consumption by, among other things:
- concentrating the energy charge on the front area of the glow tube,
- a higher heat-up voltage compared with the design voltage,
- a new combination of sensor and heating coil and
- an improvement in heat transfer between the heating coil and the surface of the glow tube.
Both in the heat-up and the saturation phase, ISS glow plugs need considerably less energy. Furthermore, in comparison with conventional self-regulating glow plugs, in BERU ISS glow plugs the coil combination is considerably shortened and the glowing area reduced to approximately one third. In direct-injection engines, this corresponds to the part of the heating rod that projects into the combustion chamber.
The BERU ISS diesel quick start system - consisting of a control unit, a cable set and controlled, high-performance glow plugs - was developed for production for the first time in 2000 by the Ludwigsburg specialists in Ignition Technology, Diesel Cold-Start Technology, Electronics and Sensor Technology. Since 2001 it has been included as standard at Audi, BMW, Chevrolet, Chrysler, General Motors, Isuzu, Mercedes-Benz, Seat, Skoda and Volkswagen.
