WO1991009221A1 - Systeme de purge a ecoulement regule d'une boite - Google Patents

Systeme de purge a ecoulement regule d'une boite Download PDF

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Publication number
WO1991009221A1
WO1991009221A1 PCT/EP1990/002105 EP9002105W WO9109221A1 WO 1991009221 A1 WO1991009221 A1 WO 1991009221A1 EP 9002105 W EP9002105 W EP 9002105W WO 9109221 A1 WO9109221 A1 WO 9109221A1
Authority
WO
WIPO (PCT)
Prior art keywords
vacuum
canister purge
canister
volume chamber
regulator
Prior art date
Application number
PCT/EP1990/002105
Other languages
English (en)
Inventor
John Edward Cook
Original Assignee
Siemens Aktiengesellschaft
Siemens Automotive Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US07/452,664 external-priority patent/US4995369A/en
Priority claimed from US07/490,791 external-priority patent/US5054455A/en
Priority claimed from US07/591,219 external-priority patent/US5050568A/en
Application filed by Siemens Aktiengesellschaft, Siemens Automotive Ltd. filed Critical Siemens Aktiengesellschaft
Priority to EP91900229A priority Critical patent/EP0506698B1/fr
Priority to KR1019920701445A priority patent/KR920703992A/ko
Priority to DE69017713T priority patent/DE69017713T2/de
Publication of WO1991009221A1 publication Critical patent/WO1991009221A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F02M25/0836—Arrangement 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/003—Adding fuel vapours, e.g. drawn from engine fuel reservoir
    • F02D41/0032—Controlling the purging of the canister as a function of the engine operating conditions
    • F02D41/004—Control of the valve or purge actuator, e.g. duty cycle, closed loop control of position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B61/00—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing
    • F02B61/04—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers
    • F02B61/045—Adaptations of engines for driving vehicles or for driving propellers; Combinations of engines with gearing for driving propellers for marine engines

Definitions

  • This invention relates to evaporative emission control systems of the type that are commonly used in association with internal combustion engines of automotive vehicles.
  • Governmental regulations establish limits for the amount of fuel vapor that is permitted to be emitted from an automotive vehicle to atmosphere.
  • the establishment of stricter regulations may impose heavier burdens on evaporative emission control systems such that the present systems may not be able to achieve compliance. Accordingly, there is a need for further improvement in the existing evaporative emission control systems of automotive vehicles so that increased flow rates of excess fuel vapors can be successfully handled without sacrificing low flow rate accuracy.
  • the present invention is directed to a solution for meeting this need.
  • the first four drawing figures relate to an embodiment which comprises the inclusion of a variable orifice in the vapor flow path from the canister to the induction system and the use of the engine's throttle to exercise control over the degree of restriction imposed by the variable orifice on the vapor flow path to the induction system.
  • the variable orifice is progressively increasingly restricted as the engine is progressively increasingly throttled.
  • a purge regulator that is under the control of the engine ECU also exercises control over the vapor flow to the induction system.
  • the ECU is programmed using conventional programming techniques to produce a desired degree of purge flow regulation in accordance with engine operating conditions detected by the ECU.
  • certain principles of the invention contemplate the conjoint control of the vapor flow from the canister to the induction system by the throttle's control of the variable orifice and by the ECU'S control of the purge regulator.
  • a modern internal combustion engine that contains an ECU typically has a throttle position sensor that provides to the ECU an indication of the instantaneous throttle position.
  • the throttle position sensor signal is made inherently representative of the degree of restriction imposed by the variable orifice on vapor flow from the canister to the induction passage.
  • the ECU can "read" the variable orifice and take that reading into account as it exercises control over the purge regulator.
  • the invention is well suited for providing controlled canister purging over a large dynamic range extending from engine idle to wide open throttle. It is also- capable of providing a steadier flow that is beneficial in attenuating hydrocarbon emission spikes in the engine exhaust.
  • Figures 5 through 9 of the drawings relate to a novel construction for coupling the purge valve with the movable wall (diaphragm) that operates it.
  • a rod that is guided for linear motion has one end connected to the movable wall and the other end to the purge valve.
  • the connection to the movable wall is through a joint that essentially precludes the transmission of any bending moment from the movable wall to the rod.
  • the connection to the valve provides for a certain wobble of the valve head that is advantageous for proper seating on the valve seat while preventing fluid leakage through the connection.
  • the combination of these features enhances the accuracy of response of the device to commands.
  • the remaining drawing figure relates to an embodiment of purge regulator in which the construction of the vacuum regulator is different from that of the vacuum regulator of Fig. 5.
  • Fig. 1 is a schematic diagram presenting the presently preferred embodiment of regulated flow canister purge system according to the present invention.
  • Fig. 2 is a view looking in the direction of arrows 2-2 in Fig. 1.
  • Fig. 3 is a view similar to Fig. 2, but illustrating another position of operation.
  • Fig. 4 is a graph plot of actual test flow data useful in explaining certain principles of the invention.
  • Fig. 5 is a cross section through a preferred embodiment of valve.
  • Fig. 6 is an enlarged fragmentary view of a portion of Fig. 5.
  • Fig. 7 is a transverse cross section taken in the direction of arrows 7-7 in Fig. 6.
  • Fig. 8 is an enlarged fragmentary view of a portion of Fig. 6.
  • Fig. 9 is a plan view of one of the parts of Fig. 8 shown by itself.
  • Fig. 10 is a cross section through another embodiment of valve.
  • An automotive vehicle that is powered by an internal combustion engine includes a fuel tank 10 and a throttle assembly 12. Excess fuel vapors that are vented from tank 10 are collected in a canister 14. The collected vapors are exhausted from canister 14 to the air induction passage 16 that passes through the body 18 of throttle assembly 12 with the passage of the vapors being under the conjoint control of a variable orifice valve 20 and a purge regulator 22.
  • Variable orifice valve 20 is operated directly by the throttle mechanism 24 of throttle assembly 12.
  • Valve 20 comprises a body 26 that is fixedly mounted on the outside wall of throttle body 18.
  • Throttle mechanism 24 comprises a shaft 28 that is arranged perpendicular to the direction of induction air flow through passage 16 and is journaled for rotation on the throttle body. Shaft 28 is operated by a crank 30 that is linked to the vehicle accelerator pedal (not shown) . A throttle blade, or butterfly, 32 is fastened to shaft 28 within passage 16. The extent to which shaft 28 is operated by crank 30 determines the position of butterfly 32 within passage 16 and hence the degree of 5 throttling of the engine.
  • TPS 34 throttle position sensor 34 that is disposed outboard of variable orifice valve 20.
  • ECU engine electronic control unit
  • TPS 34 provides to ECU 36 an electrical signal indicative of the instantaneous throttle position. 5
  • ECU 36 controls a number of engine operating functions, such as fuel, spark, etc. It also exercises control over purge regulator 22.
  • variable orifice valve 20 Details of variable orifice valve 20 include an inlet nipple 38 providing for the connection of a hose 40 from canister 14 and an outlet nipple 42 providing for connection of a hose 44 to purge regulator 22. Disposed within the interior of valve body 26 and affixed to shaft
  • 25 28 is a valving member in the form of a rotary cam 46.
  • cam 46 has a profile 48 that is adapted to coact with the interior end of nipple 42 as the throttle shaft rotates thereby providing a 30 variable restriction.
  • Fig.l shows throttle blade 32 in essentially the wide open throttle position, and the corresponding position portrayed by Fig. 2 represents the minimum restriction position of the variable orifice valve.
  • cam 46 rotates in the clockwise sense as viewed in Fig. 2 to progressively increasingly restrict the variable orifice.
  • the variable orifice imposes maximum restriction to flow from canister 14.
  • TPS 34 is being concurrently operated with cam 46, the TPS signal to ECU 36 is inherently representative of the degree of restriction being imposed by the variable orifice valve on vapor flow from the canister. In this way, the ECU can "read" the TPS to determine the restriction being imposed on the flow from the canister.
  • Purge regulator 22 may be considered to comprise two conventional components, namely an electronic vacuum regulator (EVR) 50 and a vacuum regulator 52.
  • EVR electronic vacuum regulator
  • a device like that described in commonly assigned U.S. patent 4,850,384 is suitable for EVR 50.
  • the EVR has a vacuum inlet nipple 54, an atmospheric vent 56, and a vacuum outlet nipple 58.
  • Nipple 54 is connected to a vacuum signal source, namely engine manifold vacuum 60, by a hose 62.
  • the EVR contains a solenoid that is pulse width modulated by ECU 36. In this way the vacuum level that appears at nipple 58 is controlled by ECU 36.
  • Vacuum regulator 52 comprises a control nipple 64 that is connected to nipple 58 by a hose 66. It also has an inlet nipple 68 to which hose 44 is connected and an outlet nipple 70 connected by a hose 72 to a nipple 74 that extends through the wall of throttle body 18 at a location downstream of throttle blade 32. Vacuum regulator 52 is responsive to the vacuum output of EVR 50 to regulate the flow through the vacuum regulator from nipple 68 to nipple 70.
  • vapor flow from canister 14 to induction passage 16 is a function both of the throttle position as the throttle shaft controls variable orifice valve 20, and of the degree to which ECU 36 permits flow through purge regulator 22.
  • variable orifice valve 20 on the canister purge process
  • Fig. 4 presents, by way of example, a series of six individual graph plots, each of which corresponds to a specific pressure drop across the variable orifice valve 20.
  • the pressure drops that are represented in Fig. 4 are, in terms of inches of mercury (Hg) , 0.5 inch, 1.0 inch, 1.5 inches, 2.0 inches, 3.0 inches, 4.0 inches.
  • the corresponding graph plot depicts the flow rate through the variable orifice valve 20 as a function of the amount of throttle blade opening between fully open and closed throttle conditions.
  • the flow vs. pressure drop characteristic is defined for valve 20.
  • suitable mapping of the ECU such as in the exemplary manner of Fig. 4 enables the ECU to know the corresponding flow vs. pressure drop characteristic of variable orifice valve 20 for specific throttle blade positions. The ECU can then take this into account when setting purge regulator 22.
  • variable orifice valve 20 under the control of the throttle endows the emission control system with a wide dynamic range, allowing good control from engine idle to wide open throttle. As a result, the system can achieve compliance with stricter evaporative emission standards.
  • the solenoid of EVR 50 is operated by a frequency of signal from the ECU which is considerably higher than that used to control previously used CPS valves. (125-150 hz vs 10-20 hz, typically). This serves to attenuate hydrocarbon spikes in exhaust emission.
  • Figs. 5-9 present details of a purge regulator 80. It comprises an EVR 82 and a vacuum regulator 84. Although the illustrated purge regulator embodies the EVR and the vacuum regulator in a single unit, they could be embodied as two separate devices with a suitable connection from the EVR to the vacuum regulator.
  • EVR 82 is essentially conventional, comprising a vacuum inlet 86 to which vacuum is supplied and an outlet 88 at which a percentage of the vacuum is delivered, as determined by an electrical control signal supplied to an electrical input 90.
  • the vacuum from outlet 88 is supplied as an input to vacuum regulator 84.
  • Vacuum regulator 84 may be considered to comprise an actuator portion 92 and a valve portion 94.
  • Actuator portion 92 comprises a movable interior wall 95 that divides two variable volume chamber spaces 96 and 98 whose respective volumes establish the position of movable wall 95.
  • Regulated vacuum from outlet 88 is supplied to chamber space 96.
  • Chamber space 98 is in communication with the fuel vapor storage canister via valve portion 94.
  • Valve portion 94 comprises an inlet nipple 100 via which it is placed in communication with the fuel vapor storage canister, and an outlet nipple 102 via which it is placed in communication with the engine intake manifold.
  • a valve 104 that is operated by actuator portion 92 controls communication through valve portion 94 between inlet nipple 100 and outlet nipple 102.
  • Figs. 5 and 8 show valve 104 in seated position on a valve seat 106 preventing flow from nipple 100 to nipple 102.
  • Valve 104 is coupled to movable wall 95 by means that includes a straight circular cylindrical rod 108.
  • Rod 108 is guided for straight-line motion toward and away from valve seat 106 by means of an annular guide member 110 which is secured to the housing 112 by any suitable means such as 114.
  • Guide member 110 comprises a cylindrical sleeve 116 which is co-axial with both movable wall 94 and valve seat 106 and through which the central portion of rod 108 passes.
  • Guide member 110 also comprises a hole 118 which serves to communicate chamber space 98 with whatever pressure or vacuum may occur on the canister side of valve 104.
  • Hole 118 is an orifice which is sized to control the rate at which flow can pass between chamber space 98 and the space 109 within which valve 104 is disposed.
  • the net result is the imposition of a damping force on movable wall 95 which serves to prevent valve fluttering that might otherwise occur in response to II rapidly occurring changes in pressure differential across the orifice (i.e. between chamber space 98 and space 109) .
  • the orifice effect may also have a tendency toward linearizing the response of the vacuum regulator.
  • Fig. 5 shows the presence of a fixed orifice 111 in the wall between nipple 100 and space 109.
  • Orifice 111 is effective to ensure that the magnitude of vacuum in space 109 at least approximates the engine manifold vacuum, while also establishing an upper limit for the flow rate through the vacuum regulator.
  • Orifice ill may be present either with or without a co-operative association of purge regulator 80 with a variable orifice valve, like valve 20 of Figs. 1-4.
  • any given configuration of a regulated flow canister purge system will of course be designed for compliance with a defined engineering specification, and hence one configuration may comprise a variable orifice valve, another, a variable orifice valve connected to a purge regulator (with or without fixed orifice) , another only a purge regulator with an orifice.
  • a purge regulator can be designed to service different requirements without major modification. Rather than making the purge regulator of Fig. 5 to have an integral fixed orifice, the purge regulator can be constructed to have the opening between space 109 and hippie 100 equal to the cross-sectional area of nipples 100,102, and adopting the nipple to receive an inserted orifice disc. Such an orifice disc will close most of the nipple except for an orifice in the disc. The area of the orifice in any given orifice disc may be selected as required for the particular system into which the purge regulator is to be installed.
  • the end of rod 108 that is opposite the end containing valve 104 is coupled with movable wall 95 by means of a joint 120 that is designed so as to be incapable of transmitting any significant bending moment from movable wall 95, through the rod, to the valve.
  • This attribute is important because the action of movable wall 95 on the rod might otherwise impart a bending moment which could adversely affect rod displacement and hence impair the accuracy of the rod's positioning of valve 104.
  • a principal cause of the tendency of movable wall 95 to impart a bending moment to rod 108 is due to the fact that the wall is resiliently biased by a helical coil spring 122 in a sense that urges valve 104 toward seating on seat 106, and the force distribution acting on the movable wall is not circumferentially uniform.
  • the movable wall has a tendency to tilt, or cock about its axis, but adverse consequences of this tendency are avoided because of the provision of joint 120.
  • Joint 120 comprises a spherically contoured surface 124 in movable wall 95 acting through an element 126 on the end of rod 108.
  • Element 126 comprises a head 128 having on one side a flat surface 130 against which surface 124 is in tangential contact.
  • a cylindrical annular shank 132 extends from the opposite side of head 128 and is united to the rod end by an interference-fit therewith.
  • the distal end of shank 132 is rounded at 134 for seating in a complementary rounded depression 136 in an annular member 138.
  • the outer margin of member 138 is shaped to form a seat for one end of a further helical coil spring 140 that is disposed between member 138 and member 110, the latter having a spring seat for the opposite end of the spring.
  • Spring 140 functions to keep the surface 130 of head 128 against surface 124 (i.e.. capture element 126 between wall 95 and member 138) as the movable wall is positioned within the housing 112.
  • the rounded fitting of member 138 to the distal end of shank 132 prevents spring 140 from transmitting any significant bending moment to the joint.
  • Valve 104 comprises an elastomeric part 142 and a relatively more rigid metal part 144.
  • Part 144 is a circular metal disc that is disposed interiorly of an annular head 146 of elastomeric part 142.
  • Part 144 has an aperture 148 of the shape illustrated in Fig. 9 that provides for attachment of the part to rod 108 in such a manner that it can wobble to a certain extent on the rod.
  • Part 142 further comprises an annular sleeve 150 extending from head 146 and seals the valve to the rod. The rod end is shown to have axially spaced circular serrations 152 that aid in the sealing and retention of the head on the rod end.
  • Head 146 also contains a circular ridge 154 for sealing contact with valve seat 106.
  • the design of valve 104 is beneficial in attaining proper sealing, especially in mass production usage, because the head can self-adjust to the seat while sealing of the valve to the rod end is assured.
  • Movable wall 95 is axially positioned in accordance with the pressure differential between the two chamber spaces 96, 98. Since a controlled percentage of manifold vacuum is applied to chamber space 96, the relative volumes of the two chamber spaces and hence the position of wall 95 are related to the percentage manifold vacuum applied to the vacuum regulator from the EVR. This will produce a corresponding positioning of valve 104 to control the flow of vapor from the canister to the manifold. In this way the purging of the canister is regulated to occur during conditions of engine operation that are conducive to purging.
  • Fig. 10 shows a purge regulator 160 comprising an EVR 162 and a vacuum regulator 164.
  • EVR 162 is essentially like EVR 82, comprising a vacuum inlet 166 for connection to manifold vacuum and an outlet 168 that is communicated to a chamber space 170 of vacuum regulator 164 corresponding to the chamber space 96 of vacuum regulator 84.
  • the vacuum that is delivered to chamber space 170 from EVR 162 is a percentage of the vacuum input at inlet 166 as determined by an electrical control signal supplied to the EVR's solenoid 172.
  • Vacuum regulator 164 comprises a housing 174 that is divided into two chamber spaces 170, 176 by a movable wall 178.
  • Housing 174 has an inlet nipple 180 and an outlet nipple 182.
  • the inlet nipple is open to chamber space 176.
  • a valve seat 184 is fashioned within chamber space 176 around outlet nipple 182.
  • Wall 178 comprises an outer annular part 186, and a rigid central part 188.
  • the face of part 188 which is toward seat 184 contains a valve member in the general form of a circular disc 190.
  • a helical coil spring 192 which is disposed in chamber space 170 bears against part 188 to resiliently urge disc 190 into seating on seat 184 so that chamber space 176 is closed to outlet nipple 182.
  • Purge regulator 160 operates as follows. A percentage of manifold vacuum is delivered to chamber space 170.
  • the resulting change in force caused by the change in vacuum within chamber space 176 will act upon moveable wall 178 causing the relationship between disc 190 and seat 184 to adjust until there is a regulated balance between chambers 170 and 176.
  • the newly established relationship between the disc and seat will adjust the flow from the canister to the intake manifold so that it is essentially the same flow prior to the increase in manifold vacuum. In this manner the purge regulator maintains a constant flow from the canister to the intake manifold when the intake manifold vacuum changes.
  • the electronic vacuum regulator will change the level of vacuum within chamber space 170.
  • the resulting change in force will act in conjunction with the force of bias spring 192 on moveable wall 178 causing the relationship etween disc 190 and seat 184 to adjust until there is a new regulated balance between chambers 170 and 176.
  • the newly established relationship between the disc and seat will provide a change in flow from the canister to the intake manifold that is relative to the percentage change in the control signal from the ECU. In this manner an electrical signal can provide control over the flow through the purge regulator.
  • the EVR reduces the level of vacuum in chamber space 170.
  • the reduction of vacuum and hence force acting on moveable wall 178 will allow the force of bias spring 192 working in conjunction with the resulting force of the vacuum in chamber 176 to move disc 190 and moveable wall 178 in an axial direction towards seat 184.
  • the restriction to flow will continue to increase until it causes the vacuum (and resulting force) within chamber 176 to drop to a level that will provide a regulated balance with the vacuum and the bias spring (and resulting force) in chamber 170.
  • the relationship between the disc and seat within regulator 164 will provide a lower regulated flow between the canister and intake manifold that is relative to the control signal applied to the purge regulator.
  • purge regulator 160 performs in like manner to purge regulator 80, but it may possess a somewhat under tolerance on regulation. Such increased tolerance may be acceptable in certain canister purge systems, and hence purge regulator 160 offers a less costly alternative to purge regulator 80 for such uses.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Le système de contrôle des émissions par évaporation destiné à un moteur à combustion interne purge la boîte collectrice de vapeur vers la tubulure d'admission par l'intermédiaire d'un régulateur de purge commandé par l'unité de commande électronique (ECU) du moteur. Le régulateur de purge comporte une soupape à diaphragme et un régulateur électronique de vide. Le régulateur de purge sert à obtenir un débit de purge qui correspond à un signal de commande provenant de l'ECU du moteur et du vide de la tubulure, à maintenir le débit de purge à un niveau sensiblement constant en réaction à certaines modifications de l'importance du vide de la tubulure, et à rajuster le débit de purge en fonction des modifications du signal de commande provenant de l'ECU du moteur.
PCT/EP1990/002105 1989-12-18 1990-12-05 Systeme de purge a ecoulement regule d'une boite WO1991009221A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP91900229A EP0506698B1 (fr) 1989-12-18 1990-12-05 Systeme de purge a ecoulement regule d'une boite
KR1019920701445A KR920703992A (ko) 1989-12-18 1990-12-05 일정 유량의 여과정화장치
DE69017713T DE69017713T2 (de) 1989-12-18 1990-12-05 System zum unterdrücken des austretens von brennstoffverdunstungsgas bei einer brennkraftmaschine.

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US452,664 1989-12-18
US07/452,664 US4995369A (en) 1989-12-18 1989-12-18 Regulated flow canister purge system
US07/490,791 US5054455A (en) 1989-12-18 1990-03-08 Regulated flow canister purge system
US490,791 1990-03-08
US07/591,219 US5050568A (en) 1990-03-08 1990-10-04 Regulated flow canister purge system
US591,219 1990-10-04

Publications (1)

Publication Number Publication Date
WO1991009221A1 true WO1991009221A1 (fr) 1991-06-27

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ID=27412542

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/002105 WO1991009221A1 (fr) 1989-12-18 1990-12-05 Systeme de purge a ecoulement regule d'une boite

Country Status (6)

Country Link
EP (1) EP0506698B1 (fr)
JP (1) JPH05502492A (fr)
KR (1) KR920703992A (fr)
CA (1) CA2071925A1 (fr)
DE (1) DE69017713T2 (fr)
WO (1) WO1991009221A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778784A1 (fr) * 1998-05-13 1999-11-19 Renault Procede de commande d'une electrovanne, notamment d'un circuit de purge canister d'un moteur
WO2010150073A1 (fr) * 2009-06-22 2010-12-29 Eaton Corporation Vanne de commande d’émissions d’un petit moteur

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038741B1 (fr) 2015-07-09 2019-03-22 Continental Automotive France Procede et dispositif de determination d'un modele de debit au travers d'une vanne

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308842A (en) * 1978-10-02 1982-01-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for an internal combustion engine
DE3623894A1 (de) * 1985-07-17 1987-01-29 Nippon Denso Co System zum unterdruecken des austretens von brennstoff-verdunstungsgas bei einer brennkraftmaschine
US4703737A (en) * 1986-07-31 1987-11-03 Bendix Electronics Limited Vapor control valve and system therefor
US4944276A (en) * 1987-10-06 1990-07-31 Colt Industries Inc Purge valve for on board fuel vapor recovery systems

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4308842A (en) * 1978-10-02 1982-01-05 Honda Giken Kogyo Kabushiki Kaisha Evaporative emission control system for an internal combustion engine
DE3623894A1 (de) * 1985-07-17 1987-01-29 Nippon Denso Co System zum unterdruecken des austretens von brennstoff-verdunstungsgas bei einer brennkraftmaschine
US4703737A (en) * 1986-07-31 1987-11-03 Bendix Electronics Limited Vapor control valve and system therefor
US4944276A (en) * 1987-10-06 1990-07-31 Colt Industries Inc Purge valve for on board fuel vapor recovery systems

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2778784A1 (fr) * 1998-05-13 1999-11-19 Renault Procede de commande d'une electrovanne, notamment d'un circuit de purge canister d'un moteur
WO2010150073A1 (fr) * 2009-06-22 2010-12-29 Eaton Corporation Vanne de commande d’émissions d’un petit moteur
US8485214B2 (en) 2009-06-22 2013-07-16 Eaton Corporation Small engine emissions control valve
US20130269804A1 (en) * 2009-06-22 2013-10-17 Eaton Corporation Small engine emissions control valve
US9139084B2 (en) * 2009-06-22 2015-09-22 Eaton Corporation Small engine emissions control valve

Also Published As

Publication number Publication date
DE69017713T2 (de) 1995-08-17
EP0506698A1 (fr) 1992-10-07
DE69017713D1 (de) 1995-04-13
CA2071925A1 (fr) 1991-06-19
EP0506698B1 (fr) 1995-03-08
KR920703992A (ko) 1992-12-18
JPH05502492A (ja) 1993-04-28

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