EP 0777041 A2 19970604 - An internal combustion engine, an engine crankcase gas blow-by sensor and a method of evaluating performance of an internal combustion engine
Title (en)
An internal combustion engine, an engine crankcase gas blow-by sensor and a method of evaluating performance of an internal combustion engine
Title (de)
Brennkraftmaschine, ein Durchblasgassensor und ein Verfahren zur Auswertung der Leistung einer Brennkraftmaschine
Title (fr)
Moteur à combustion interne, un capteur des gaz de combustion imbrûlés et un procédé pour évaluer la performance d'un moteur à combustion interne
Publication
Application
Priority
US 56441995 A 19951125
Abstract (en)
In a closed crankcase ventilation system, crankcase gases are allowed to flow through a venturi (10) which includes high pressure and low pressure taps (24 and 28). The high and low pressure taps (24) and (28) are coupled to a differential pressure transducer (30) which produces an output that is proportional to the volumetric flow of crankcase gases through the venturi (10). The use of a venturi (10) in conjunction with a differential pressure sensor (30) offers a low resistance path for the flow of crankcase gases and allows continuous monitoring of blow-by without exceeding the operating pressure limitations of various oil seals. Such a sensor (30) is particularly suited for closed crankcase ventilation (ccv) systems, as it doesn't require venting of crankcase gases to the atmosphere, but works well in open crankcase ventilation systems also. <IMAGE>
IPC 1-7
IPC 8 full level
G01M 15/04 (2006.01); F01M 11/10 (2006.01); F01M 13/00 (2006.01); F02B 77/08 (2006.01); F02D 35/00 (2006.01); F02B 3/06 (2006.01)
CPC (source: EP)
F01M 11/10 (2013.01); F01M 13/00 (2013.01); F02B 77/085 (2013.01); F02B 3/06 (2013.01)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0777041 A2 19970604; EP 0777041 A3 19980401; EP 0777041 B1 20020313; DE 69619772 D1 20020418; DE 69619772 T2 20020919; JP H09177530 A 19970708
DOCDB simple family (application)
EP 96308618 A 19961128; DE 69619772 T 19961128; JP 31991396 A 19961129