Diesel engine with an exhaust-gas filter

Details Diesel engine with an exhaust-gas filter Diesel engine with an exhaust-gas filter

1991-05-23

1992-08-18

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Material from exhaust structure fed to engine intake

60288, F02B 302, F02M 2506

Patent

active

051388359

ABSTRACT:
In an internal-combustion engine, in particular a diesel engine, with an exhaust-gas filter and an exhaust gas recirculation, the exhaust counter-pressure prevailing upstream of the exhaust-gas filter is used as one of a number of controlled variables for automatically controlling the exhaust gas recirculation. Since the exhaust-gas filter experiences flow resistance variations, particularly if it is a soot burn-off filter, which variations are independent of engine operation and consequently falsify the automatic control of the exhaust gas recirculation, the respective instantaneous exhaust-gas filter flow resistance must be measured as a correcting quantity and taken into account. A measuring device is fitted into a bypass line bridging the exhaust-gas filter and operates with a negligible bypass flow such that, above a predeterminable upper exhaust-gas filter differential pressure, it can lead past the exhaust-gas filter an increased bypass flow, which can, if appropriate, correspond to the entire exhaust flow.

REFERENCES:
patent: 4756155 (1988-07-01), Shinzawa

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