Method for increasing an exhaust gas temperature of a...

Details Method for increasing an exhaust gas temperature of a... Method for increasing an exhaust gas temperature of a...

2006-08-08

2006-08-08

Tran, Binh Q. (Department: 3748)

Power plants

Internal combustion engine with treatment or handling of...

By means producing a chemical reaction of a component of the...

C060S274000, C060S284000, C123S300000, C123S305000, C123S406470

Reexamination Certificate

active

07086221

ABSTRACT:
The invention relates to a method for at least temporarily increasing an exhaust gas temperature of a spark-ignition, direction injection internal combustion engine (10) involving at least one measure, which is executed by the engine, whereby this at least one measure consists of a spark retarding and of a multiple injection (ME). During the multiple injection (ME), at least two fuel injections into the cylinder (12) are carried out within an induction cycle and compression cycle of a cylinder (12) of the internal combustion engine (10), and the latest of these injections ensues during a compression cycle of the cylinder (12). The invention also relates to the utilization of the method. According to the invention, a control end of an injection angle (αEE) of the latest injection is at least temporarily set to between 80 and 10° before an upper ignition dead center (ZOT) when operating with multiple injection and/or an ignition angle (αZ) is at least temporarily set to between 10 and 45° after the upper ignition dead center (ZOT) also when operating with multiple injection. A combination of both measures enables a dramatic acceleration of the warming up of a catalytic converter (16) that is connected downstream from the internal combustion engine (10).

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German Search Report dated Apr. 2, 2004 for application No. 101 14 054.1.

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