EP 1870590 A1 20071226 - Internal combustion engine with a pump for exhaust gas recirculation
Title (en)
Internal combustion engine with a pump for exhaust gas recirculation
Title (de)
Brennkraftmaschine mit einer Pumpe zur Abgasrückführung
Title (fr)
Moteur à combustion interne comprenant une pompe pour recycler des gaz d'échappement
Publication
Application
Priority
EP 06425428 A 20060622
Abstract (en)
An internal combustion engine, in particular a diesel engine, has a pipe (17) for exhaust gas recirculation (EGR) having an entrance extremity (16) that branches off the engine exhaust pipe (12) downstream of a device (13) for treating the exhaust gas, and an exit extremity that flows into the pipe (5) for air intake into the engine, upstream of a booster compressor (10). Along the EGR pipe (17) a pump is interposed (19) that creates the necessary pressure difference to activate exhaust gas recirculation, thus without the need to provide a butterfly valve on the intake or exhaust and thus avoiding the consequent loss of engine efficiency. In one embodiment, the pump (19) is controlled by a variable speed electric motor (20) that is controlled as a function of the engine operating conditions, to vary the quantity of EGR in the engine. In this way it is also possible to avoid the use of the conventional EGR valve to regulate the quantity of EGR, with consequent simplification and cost reduction.
IPC 8 full level
F02M 25/07 (2006.01)
CPC (source: EP)
F02M 26/06 (2016.02); F02M 26/10 (2016.02); F02M 26/15 (2016.02); F02M 26/34 (2016.02); F02B 29/0406 (2013.01); F02M 26/21 (2016.02); F02M 26/23 (2016.02)
Citation (search report)
- [XA] EP 1672208 A2 20060621 - PIERBURG GMBH [DE]
- [XA] EP 1493907 A2 20050105 - MAZDA MOTOR [JP]
- [XA] FR 2840648 A1 20031212 - INST FRANCAIS DU PETROLE [FR]
- [XA] EP 1186767 A2 20020313 - TOYOTA MOTOR CO LTD [JP]
- [A] EP 1589213 A1 20051026 - FIAT RICERCHE [IT]
- [A] US 6435166 B1 20020820 - SATO FUMIHIDE [JP], et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK YU
DOCDB simple family (publication)
DOCDB simple family (application)
EP 06425428 A 20060622