Method for operating a multiple injection internal...

Details Method for operating a multiple injection internal... Method for operating a multiple injection internal...

2005-05-31

2005-05-31

Wolfe, Jr., Willis R. (Department: 3747)

Internal-combustion engines

Combustion chamber means having fuel injection only

Combustible mixture stratification means

C123S299000, C123S305000, C123S491000

Reexamination Certificate

active

06899077

ABSTRACT:
The aim of the invention is to reduce exhaust emission during the staring phase of a direct-injection internal combustion engine. For this purpose, at least one first injection per working cycle takes place when the internal combustion engine is cold, especially during the starting and/or warm-up phase, thereby producing a substantially homogeneous, combustible fuel/air mixture (56) in the combustion chamber (12). In the same working cycle at least one further injection is supposed to take place which produces a substantially rich fuel/air mixture (64) in the zone of the ignition device (34). The lambda value of the fuel/air mixture (64) produced by the second injection in the zone of the ignition device (34) is smaller than the lambda value of the fuel/air mixture (56) present in the remaining combustion chamber.

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