Global Patent Index - EP 0777041 B1

EP 0777041 B1 20020313 - An internal combustion engine with an engine crankcase gas blow-by sensor and a method of evaluating performance of an internal combustion engine

Title (en)

An internal combustion engine with an engine crankcase gas blow-by sensor and a method of evaluating performance of an internal combustion engine

Title (de)

Brennkraftmaschine mit einem Durchblasgassensor und ein Verfahren zur Auswertung der Leistung einer Brennkraftmaschine

Title (fr)

Moteur à combustion interne avec un capteur des gaz de combustion imbrûlés et un procédé pour évaluer la performance d'un moteur à combustion interne

Publication

EP 0777041 B1 20020313 (EN)

Application

EP 96308618 A 19961128

Priority

US 56441995 A 19951125

Abstract (en)

[origin: EP0777041A2] 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

F02B 77/08; F01M 11/10; F01M 13/00; F02B 77/10

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)

Citation (examination)

US 3862624 A 19750128 - UNDERWOOD PATRICK LEE

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