This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
The three cylinder Ecotec Compact Engine from Opel with port deactivation~A contribution to reduce the fleet average fuel consumption
Technical Paper
1999-07-0058
Sector:
Language:
German
Abstract
The Ecotec Compact Engine, introduced in 1997 by Adam Opel AG,
utilizes four valve technology consequently for the reduction of
fuel consumption. The introduction of the 1.0 l three cylinder
engine in the Opel Corsa resulted in a reduction of fuel
consumption of 11% in the European MVEG cycle compared to the 1.2 l
two valve engine.
This paper describes the application of a port deactivation and
a high EGR rate system. Due to the high combustion stability it is
possible to apply very high EGR rates of up to 25% in the vehicle.
This charge dilution leads to a remarkable dethrottling of the
engine at part load. Due to this and additional measures to reduce
engine friction fuel consumption in the MVEG cycle could be reduced
by additional 10.5% to 5.1 l/100 km.
This engine was also used for the demonstration of a so- called
""3-liter-car"" (90 g CO2/km). With the 750
kg concept car ""G90"" presented at the 1999
Frankfurt International Motor Show (IAA) it was for the first time
possible to approach the 90 g CO2/km border with a conventional
gasoline engine with port fuel injection.
The consequent improvement of the engine while maintaining
mixture preparation with port fuel injection leads to a
considerable improvement in fuel consumption with acceptable system
complexity. In that way an attractive price of the new vehicle for
the customer can be realized in combination with very low operating
expenses over the lifetime of the vehicle. Only by doing so it is
possible to have great influence on the sales-weighted fleet
average fuel consumption.