Impulse Start/Stop

The start/stop function in passenger cars and light commercial vehicles will become a more and more standard feature. Particularly oncoming CO2 emission regulations drive the automotive industry towards this - at first sight - straightforward fuel saving principle. However, comfort and performance issues for current generation start/stop systems as well as an increase in workload for manual transmission drivers penalize a succesful adoption of this commodity-to-come. Next to this, the basic 14V powernet (generator, lead-acid battery, circuitry) which has been hardly innovated through the last decades as of its inherent robustness, needs strong and sometimes costly adaptations by virtue of the electric start/stop systems.
DTI has developed a new type of start/stop system that relaxes on all these technological issues in a new and unique "impulse start/stop" design. Extremely fast engine cranking, no additional 14V powernet requirements and a 100% consistent engine stop operation can now be combined cost-effectively through a compact flywheel-based engine cranking module. The module can be integrated either with the existing starter motor or in the main drive pulley at the front side of the engine. On standardized driving cycles the system shows the same fuel saving potential as existing start/stop system. However, in practice the fuel saving may be higher as of unpenalized and consistent cranking capabilities and thus engine stop periods triggered at nearly all occuring opportunities.
The flexible and cost-effective implementation of the impulse start/stop system also makes an ideal and functionally integrated combination with all types of automatic transmissions, such as AMT, DCT, AT and CVT. The ultra-fast cranking capabilities also make it a good solution for engines with dual-mass-flywheel (e.g. diesel). With impulse start/stop the potentially surging and oscillating engine starting dynamics remain untouched. 
Finally, it also provides a solution for the so called "stop-in-gear" situation in case of manual transmissions. For triggering an engine stop, the manual driver does not necessarily have to put the shift lever into neutral and disengage the clutch pedal. Instead, the engine will also run down when the driver keeps the clutch pedal down and gearbox in first gear during stand-still at a traffic light. At green light, the impulse start/stop is sufficiently fast and strong to both re-crank the engine and already provide drive torque for the clutch before the actual combustion initiates.

Download Impulse Start/Stop leaflet >>