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1. EP0998630 - REGULATED LINEAR PURGE SOLENOID VALVE

Office
European Patent Office
Application Number 98933391
Application Date 09.07.1998
Publication Number 0998630
Publication Date 10.05.2000
Publication Kind A1
IPC
F02M 25/08
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
25Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
08adding fuel vapours drawn from engine fuel reservoir
F16K 31/06
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS OR UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
31Operating means; Releasing devices
02electric; magnetic
06using a magnet
G05D 7/06
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
7Control of flow
06characterised by the use of electric means
CPC
F02M 25/0836
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
MSUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
25Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
08adding fuel vapours drawn from engine fuel reservoir
0836Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
F16K 31/0675
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
31Actuating devices;; Operating means; Releasing devices
02electric
06using a magnet ; , e.g. diaphragm valves, cutting off by means of a liquid
0675Electromagnet aspects, e.g. electric supply therefor
Applicants SIEMENS CANADA LTD
Inventors COOK JOHN E
BUSATO MURRAY F
Designated States
Priority Data 9800664 09.07.1998 CA
08900977 25.07.1997 US
Title
(DE) GEREGELTES ELEKTROMAGNETISCHES LINEARTANKENTLÜFTUNGSVENTIL
(EN) REGULATED LINEAR PURGE SOLENOID VALVE
(FR) ELECTROVANNE LINEAIRE A PURGE REGULEE
Abstract
(EN) A pressure regulator is associated with a solenoid-operated valve that is operated by a pulse waveform at a fundamental frequency substantially greater than the frequency response of the valve mechanism. This substantially attenuates solenoid pulsations and applies a predetermined pressure differential across the valve mechanism to accomplish improved flow control accuracy. The invention is especially advantageous for purging fuel vapor to an intake manifold of an internal combustion engine of an automotive vehicle.
(FR) Selon cette invention, un régulateur de pression est associé à une électrovanne qui est déclenchée par une forme d'impulsion à une fréquence fondamentale sensiblement supérieure à la réponse en fréquence du mécanisme électrovanne. Cette invention permet de réduire sensiblement les pulsations du solénoïde et d'appliquer au sein du mécanisme électrovanne une différence de pression prédéterminée et ce, dans le but de réguler l'écoulement avec plus de précision. Cette invention est particulièrement avantageuse du point de vue de l'évacuation de la vapeur de carburant, générée dans un réservoir de carburant, vers un collecteur d'admission d'un moteur à combustion interne d'une automobile.