Search Results

The Volkswagen prechamber injection stratified charge concept has a divided combustion chamber with part of the fuel injected into the prechamber and the intake manifold. Various combustion chamber configurations have been investigated in single-cylinder engine tests, and their applicability to the four-cylinder engine is discussed. The development of the third-generation 1.61 air-cooled opposed cylinder engine, along with its mechanical fuel injection system, is described. Engine maps of the prechamber injection engine are discussed, and engine performance data are specified. Test results on the dynamometer show very low nitrogen oxide emissions with fuel economy not impaired; however, hydrocarbon emissions without aftertreatment are still unsatisfactory.

The development of a 1600 can SCE with a divided combustion chamber and fuel injection into the prechamber ist described. Mathematical simulation was used to study the influence of several parameters. Single and multi-cylinder engine tests were carried out to determine the most suitable fuel mass fraction for the prechamber. The effectiveness of the lean thermal reactor was measured. Vehicles were tested accordingly to the CVS-procedure. PNA emissions and octane requirements were also determined. Some limited testing was done with methanol fuel. During the test Programm no specific problems on components were encountered.