The SI Engine Concept of the Volkswagen "Auto 2000" 830672
The VW Research Car Auto 2000 with the spark ignition (SI) engine is intended to achieve a high level of driving performance at low fuel consumption rates while simultaneously emitting the lowest possible levels of exhaust emissions and noise. This report contains the considerations that led to selection of a 1,06 liter engine with charging by a positive displacement charger. It gives the findings of preliminary studies of the combustion chamber, charging procedure, knock limit control, and low idle-speed level. The vehicle achieved a top speed of 186 km/h, acceleration from stand still to 100 km/h in 11.7 seconds, and a fuel efficiency of 16.9 km per liter with the selected engine and a four-speed automatic transmission. At the same time, the present European limits for exhaust emission and noise regulations were fullfilled.