WO2000076909A1 - Dispositif et procede servant a commander la recuperation des vapeurs dans des colonnes de distribution de carburant - Google Patents

Dispositif et procede servant a commander la recuperation des vapeurs dans des colonnes de distribution de carburant Download PDF

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Publication number
WO2000076909A1
WO2000076909A1 PCT/EP2000/005234 EP0005234W WO0076909A1 WO 2000076909 A1 WO2000076909 A1 WO 2000076909A1 EP 0005234 W EP0005234 W EP 0005234W WO 0076909 A1 WO0076909 A1 WO 0076909A1
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WO
WIPO (PCT)
Prior art keywords
recovery
controlling
vapours
fuel
electronic
Prior art date
Application number
PCT/EP2000/005234
Other languages
English (en)
Inventor
Edoardo Motti
Raffaele Pera
Original Assignee
Nuovo Pignone Holding S.P.A.
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
Application filed by Nuovo Pignone Holding S.P.A. filed Critical Nuovo Pignone Holding S.P.A.
Priority to AT00943776T priority Critical patent/ATE250004T1/de
Priority to MXPA01012822A priority patent/MXPA01012822A/es
Priority to SK1780-2001A priority patent/SK17802001A3/sk
Priority to PL00353022A priority patent/PL353022A1/xx
Priority to AU58123/00A priority patent/AU5812300A/en
Priority to DE60005348T priority patent/DE60005348T2/de
Priority to BR0011395-6A priority patent/BR0011395A/pt
Priority to EP00943776A priority patent/EP1192102B1/fr
Priority to KR1020017015856A priority patent/KR20020014811A/ko
Publication of WO2000076909A1 publication Critical patent/WO2000076909A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/06—Details or accessories
    • B67D7/42—Filling nozzles
    • B67D7/54—Filling nozzles with means for preventing escape of liquid or vapour or for recovering escaped liquid or vapour
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D7/00—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes
    • B67D7/04—Apparatus or devices for transferring liquids from bulk storage containers or reservoirs into vehicles or into portable containers, e.g. for retail sale purposes for transferring fuels, lubricants or mixed fuels and lubricants
    • B67D7/0476—Vapour recovery systems
    • B67D7/0478—Vapour recovery systems constructional features or components
    • B67D7/048—Vapour flow control means, e.g. valves, pumps
    • B67D7/0482—Vapour flow control means, e.g. valves, pumps using pumps driven at different flow rates
    • B67D7/0486—Pumps driven in response to electric signals indicative of pressure, temperature or liquid flow

Definitions

  • the present invention relates to the columns of fuel distributors, in particular columns which are provided with a system for recovery of the vapours emitted during the operations of supply to vehicles .
  • vapour phase which consists of a mixture of air and fuel vapours, and is discharged from the tanks of the vehicles as they are being supplied, is not dispersed into the environment .
  • This emission is caused substantially by the effect of displacement by the fluid admitted into the tank, which reduces the volume above its level, and expels an equivalent volume of vapour phase .
  • this air/vapour phase is sucked up by providing the fuel distributor pistols both with fuel distribution nozzles and suction nozzles, which are connected to volumetric pumps.
  • the distributor pistol is connected to the column by piping for delivery of the liquid fuel, which is supplied by a pumping unit with a variable flow rate, as well as by suction piping which is connected to a volumetric pump for suction of the vapours, which is actuated with a flow rate which is closely correlated, moment by moment, to the fuel delivery flow rate.
  • the column 10 is provided with a box- shaped support structure 11, which contains and supports its units.
  • the fuel is contained in an underground tank, not shown in the Figure, from which the fuel is obtained by means of the suction line, which consists of the intake 12, the pumping unit 13, which is connected to the distributor pistol 18, and the measurer 14, which measures the quantity of fuel distributed, before conveying it via the pipe 15 to the separator 16, from which the flexible tube 17 of the distributor pistol 18 extends .
  • a pulse generator 20 which generates an electric pulse for each fuel unit distributed, for example for each centilitre; this pulse signal has a frequency which is proportional to the flow rate, and is transmitted to the indicator head 21, which, on the basis of the number of pulses, calculates and indicates the quantity distributed, and the corresponding price of the supply.
  • the same signal is transmitted to the electronic control unit 22, which controls and pilots the vapour recovery system.
  • the tube 17 of the distributor pistol 18 contains both a fuel delivery pipe 23, which is the extension of the delivery pipe 15 as far as the distribution nozzle, and a return pipe 24, which is connected to a suction nozzle located in the vicinity of the distributor nozzle.
  • This nozzle sucks up the vapours which are expelled from the tank which is being filled; this return tube 24 is connected in the separator 16 to a pipe 25, which is connected to the volumetric pump 26 for suction of the vapours, which is actuated by a motor 27, which is piloted by the electronic control unit 22 at a number of revolutions, which is in relation, moment by moment, to the frequency of the pulse signal of the generator 20, such as to correlate the revolutions of the pump 26, and thus the volumetric suction flow rate, to the flow rate of delivery of the fuel.
  • the delivery of the volumetric pump 26 is re-admitted via the pipe 28 into the underground tank of the distributor, from which the fuel is obtained; in general, the volumetric ratio between the fuel distributed and the gaseous phase which is sucked up is set and maintained with an interval of values which is close to the unit value; this setting can be varied according to the type of fuel and the environmental conditions .
  • the fuel is typically distributed with a variable flow rate, which is regulated by the operator by means of the pressure exerted on the lever 30 for regulation of the pistol, whereas the suction flow rate must follow moment by moment the development of the delivery flow rate.
  • the sequence of the pulses represents faithfully the situation, moment by moment, of the distribution of liquid which takes place, with the number of pulses corresponding to the quantity distributed, and the frequency of the pulses corresponding to the instantaneous flow rate; however, piloting of the volumetric suction pump, which takes place by modulating its instantaneous speed, i.e. its number of revolutions per minute, on the basis of the instantaneous frequency of the pulses of the measurer, is not equally accurate in the final result of obtaining a constant ratio between the volumetric flow rates of the liquid distributed, and of the vapour sucked up.
  • volumetric pumps used to recover the vapours in the fuel distributors are vane pumps, roller pumps, and alternative types of pumps, and they have a characteristic flow rate/ speed curve which is not at all linear, and which therefore does not make it possible to obtain a constant ratio between the flow rates of the liquid distributed and of the vapour sucked up, if operation takes place on the basis of the frequency of the pulses of the measurer/generator, when the speed of distribution is varied, and the revolutions/minute of the volumetric pump are consequently regulated linearly.
  • Figures 2A and 2B show indicatively the typical developments of the characteristic curves (flow rate/speed) for these types of volumetric pumps functioning in a vapour recovery system.
  • Figure 2A shows the development of the characteristic curve of a vane or roller pump
  • Figure 2B illustrates qualitatively the development of a characteristic curve of an alternative pump.
  • each group of pistols 18 on the same side of the column 10 only a single distributor pistol can function at once in order to supply to the vehicle which is standing in front of the column, whereas each group of pistols 18 on each side is provided with a volumetric suction pump 26. Downstream from the volumetric pump 26, in the case of most distributor pistols 18, the delivery pipes for the vapours sucked up into the corresponding underground tanks are sub-divided into various pipes 28, and on each of these there is installed a switching system which comprises a series of non-return valves, one of which is shown schematically in Figure 1, and is generally indicated as 31, downstream from the pump 26.
  • the object of the present invention is thus to provide a device and to indicate a method for controlling the recovery of the vapours in fuel distributor columns, which take into account the actual operative conditions, and makes it possible to fulfil the requirement of establishing and maintaining a predetermined ratio in terms of volume, between the flow rates of the liquid distributed and the vapour sucked up, both when the flow rate of liquid distributed is varied, and when the fuel or the associated conditions are varied.
  • the technical effect required is that of imparting to the vapour recovery system the capacity to obtain a ratio between the flow rates pre-determined and required, both during the phase of initial calibration and that of periodic control, simply by means of an operation of modulation of the speed of revolution of the electric motor which is connected to the volumetric pump.
  • the device according to the invention is defined according to its substantial characteristics in the first claim, and its preferred or alternative embodiments are defined in the dependent claims.
  • the method according to the invention makes it possible to obtain linear proportionality between the quantity of vapours recovered and the quantity of product distributed, by means of an electronic control unit, which controls suitably the variation of speed of the vapour suction pump; the number of revolutions of the pump varies according to the signal obtained from a pulse generator, via an electronic head.
  • FIGS. 2A, 2B are two Cartesian diagrams showing qualitatively the developments of the characteristic flow rate/speed curves, relating respectively to a system with a vane or roller pump, and a system with an alternative pump.
  • Figures 1, 2A and 2B illustrate the technical problem to which the present invention relates
  • - Figure 3 is a block diagram of the control device for recovery of the vapours, according to the present invention.
  • FIG. 4A, 4B, 4C, 4D show a first embodiment of a wiring diagram of the vapour recovery control device according to the present invention
  • FIG. 5 relates to a second embodiment of a wiring diagram of the control device, according to the present invention.
  • V/L when the flow rate varies in a vapour recovery system which is provided with a proportional valve, with a pump with a fixed number of revolutions, which is controlled mechanically by the motor of the pumping unit, or by an independent motor;
  • FIG. 7 shows a Cartesian diagram which illustrates the qualitative development of the ratio V/L, when the flow rate varies in a vapour recovery system with a pump with variable revolutions, which is controlled electronically;
  • FIG. 8 shows a Cartesian diagram which illustrates the qualitative development of the curve of corrective values, when the point of operation is varied, and which can be used in the vapour recovery system in accordance with the control device according to the invention.
  • the system 35 comprises the volumetric suction pump 26, which is connected to its own electric motor 27, and has a level of protection suitable for fitting in a dangerous area, and an electronic control unit 22, which is fitted in a non-dangerous area.
  • the volume of the vapour recovered depends on the flow rate of fuel distributed, and in order to be able to carry out this regulation, the control unit 22 detects the pulses obtained from the electronic head 21, or directly from the pulse generator 20, and acts on the speed of the motor 27 of the pump 26.
  • the vapour recovered is conveyed into the fuel storage tank via the flexible pipe 24, which is coaxial relative to the delivery tube 23 for distribution of the fuel.
  • the vapour recovery system 35 can be used for suction of vapours of normal, super and super unleaded petrol.
  • the electronic unit 22 controls the speed of the brushless-type motor 27, and is supplied with monophase alternating current, thus guaranteeing satisfactory operation for a supply voltage equivalent to 230 Volts (nominal value) and a supply voltage frequency of 50 Hz.
  • the electronic control unit 22 receives as input a series of reference signals, which are processed correspondingly, such as to render virtually linear the function which associates the volume of the vapour recovered by the system 35, with the volume of the fuel distributed, which function actually follows a nonlinear development .
  • the control unit 22 has a regulator, such that it can adapt to the different amplitudes (typically +5V to +12V, or +12V to +35V) of the signal obtained from the pulse generator 20, such that it can interface with the pulse generators which are currently most commonly available on the market, the output stage of which can be of the NPN open collector, PNP open collector, totem-pole, or push-pull type.
  • the speed coefficients of the compensation curve are obtained by means of a device which makes it possible to determine these values automatically at the various distribution flow rates; alternatively, these coefficients can be calculated by means of an applicative programme which is installed on an electronic processor, which makes it possible to store up to 100 coefficients in a frequency interval of the speed reference which varies from 0 to 100 Hz.
  • the compensation curve can be further modified by adding or subtracting a constant value obtained from a trimmer, or by means of a coefficient which can be set by means of the processor; the interval of regulation of the speed is within 20%, whereas the direction of revolution of the motor 27 can be set by means of a dip-switch, or by means of the processor itself.
  • the electronic control unit 22 also has an input for connection of a temperature sensor, which is accommodated inside the motor 27; when the temperature of the windings exceeds a pre-determined value, distribution of energy is interrupted until the temperature drops below this limit.
  • a temperature sensor which is accommodated inside the motor 27; when the temperature of the windings exceeds a pre-determined value, distribution of energy is interrupted until the temperature drops below this limit.
  • an LED diode which shows the operating state, indicates the abnormality by switching on intermittently; after a predetermined number of blocks and re-starts (which can be set) , within a specific period of time (which can be set) , the vapour recovery system is stopped definitively.
  • a sensor to measure the ambient temperature can be connected as an alternative to the temperature sensor of the motor 27.
  • the power stage of the control unit 22 is provided with a sensor which measures the temperature, such that, when the temperature exceeds the value of approximately 85 °C, distribution of energy to the motor 27 is stopped, and the LED diode which indicates the operating state lights; this condition continues until the temperature drops below this limit.
  • a sensor which measures the temperature, such that, when the temperature exceeds the value of approximately 85 °C, distribution of energy to the motor 27 is stopped, and the LED diode which indicates the operating state lights; this condition continues until the temperature drops below this limit.
  • thermal protection there is also protection relating to the maximum current, which functions when a predetermined value of current intensity is exceeded, thus interrupting distribution of energy to the motor 27, and this distribution is then restored automatically after a number of attempts which can be programmed from a minimum of 1 to a maximum of 8.
  • the control unit 22 also has a serial communication gate of type RS485 for interfacing with an electronic processor and with a device for calibration and diagnosis of the system; in particular, according to preferred, but non- limiting embodiments, there is an asynchronous half/duplex serial interface of type RS485, with 1200 bauds, 8 data bits, 1 stop bit and no parity.
  • a serial communication gate of type RS485 for interfacing with an electronic processor and with a device for calibration and diagnosis of the system; in particular, according to preferred, but non- limiting embodiments, there is an asynchronous half/duplex serial interface of type RS485, with 1200 bauds, 8 data bits, 1 stop bit and no parity.
  • an electronic processor personal computer
  • the main parameters which can be indicated are (in coefficients between 0 and 127);
  • the functioning of the device for controlling the recovery of the vapours in fuel distributor columns, according to the present invention, is substantially as follows .
  • the electric motor 27 controls revolution of the vapour suction pump 26, at a speed which depends on the control signals which are received from the unit 22, and are converted into corresponding voltage signals to be supplied to the motor 27; in practice, the speed at which the motor 27 makes the pump 26 rotate, and thus the quantity of vapours recovered, depend on the voltage supplied to the motor 27.
  • control unit 22 In order to obtain the maximum efficiency of the recovery system 35, the control unit 22 must control the pump 26, such that the vapour phase is recovered at a speed which corresponds to the volume of instantaneous vapour which is generated during an operation of filling the tank of a vehicle.
  • the unit 22 determines an optimum instantaneous speed value for the suction pump 26, thus providing a non-linear function with several variables, which in turn depend on a set of independent variables, which are responsible for the variations in the volume of vapours generated during introduction of the fuel into the tank, i.e. by seeking the corresponding values in a matrix which is stored in a microprocessor.
  • the independent variables consist of the speed of distribution of the fuel, the volume of fuel distributed, the duration of the distribution, the ambient temperature, the temperature of the fuel, and any constrictions inside the return pipe 24 of the vapour phase. Other independent variables can be taken into consideration during the control procedure.
  • the values of the independent variables must be measured instantaneously, by means of a series of sensors and transducers, and the corresponding signals relating to the dependent variables must be transmitted to the control unit 22.
  • An initial calibration of the vapour recovery system 35 is carried out by means of a sample pump 26, and the function which associates the variables of flow rate of vapour V (of recovery) /flow rate of liquid L (fuel distributed) is instantaneously determined by a microprocessor, in order, consequently to regulate the optimum speed of the motor 27, in relation with the variation of all the variables involved during an operation of supply which give rise to non-linearity of the function V/L.
  • connection pins of eight connectors used in an electronic card of a system for recovery of vapours which is generally indicated by the reference 35 in Figure 3.
  • Figure 4A shows the electrical connections to the poles or pins Pl-1, Pl-2, Pl-3, Pl-6, Pl-7, Pl-8, Pl-9, Pl-10, Pl-11, Pl-12 of the connector PI of the card, which permits transmission of the electrical signals from and towards the pulse generator (pulser) 20 or the CPU card of the electronic processor, the LED signalling diode, the temperature sensor, and the encoder of the brushless motor 27.
  • the 12-pole PI connector is of the vertical male type, for example an MSTBVA 2,5/12-G-5, 08.
  • the poles Pl-1 and Pl-2 permit the connection with the pulse generator 20 (input signal, negative and positive pole respectively) , whereas at the pin Pl-3 there is available a supply (14.3 V, 100 mA) of the external pulser 20; in addition, the poles Pl-8, Pl-9 and Pl-10 permit flow at the intake of the card, of the signals relating to the encoder of the motor 27 (according to the three spatial coordinates X, Y and Z respectively) , whereas the pole Pl-11 is connected to the positive pole (6.2 V) of the supply of the brushless motor 27, and the pole Pl-12 represents a voltage reference of 0 V.
  • the poles Pl- ⁇ and Pl-7 refer to inputs available and to a voltage reference of 0 V
  • the pins Jl-4 and Jl-6 relate to a connector Jl of the 6-pole vertical pole male type, for example an AMP MODU1 280372-2, and constitute respectively an output pole for an isolated pulser signal towards an interface card (which is used if there is a vapour recovery system 35 for a multiple- product distributor, i.e. for a column 10 with several distributor pistols 18 for different products) , and a pole relating to an input available.
  • Figure 4A also shows the connections to the pins P5-1, P5-2, P5-3, P5-4 of the 4-pole connector P5 of the vapour recovery electronic card; in particular, the connector P5 of the vertical male type, for example an AMP M0DU2 280371-2, permits flow of the electrical signals from and towards the interface of the RS485 or RS422 type, or the programming terminal.
  • the connector P5 of the vertical male type for example an AMP M0DU2 280371-2
  • the pole P5-1 is connected to the positive (5 V) supply of the interface
  • the poles P5-2 and P5-3 for input and output are connected to two lines in which the signals are transmitted from and towards the interface
  • the pole P5-4 is reserved for the connection with the reference of 0 V.
  • Figure 4B illustrates the connections of the card to the pins P2-1, P2-2, P2-3, of the connector P2 , of the 3- pole vertical male type, for example an MSTBVA 2,5/3-G- 5, 08, and to the pins Pl-4 and Pl-5 of the connector PI;
  • the poles P2-1, P2-2, P2-3 allow the electrical signals output to reach the brushless motor 27, and relate to the various phases of this electric motor 27, whereas the poles Pl-4 and Pl-5 permit output of an electrical signal relating to the supply (positive pole and negative pole) of a visual signal LED diode.
  • the pin Jl-5 of the connector Jl relates to a fault output signal .
  • Figure 4C shows the connections to the poles P3-1, P3-2, P3-3, P3-6, P3-7, P3-8, P3-9, P3-10, P3-11, P3-12 of the connector P3 .which is of the same type, and has the same functions as the connector PI) , and of the poles J2-4 and J2-6 of the connector J2 (which is of the same type, and has the same functions as the connector Jl) .
  • Figure 4D shows the connections to the pins P3- 4, P3-5 of the connector P3 , the connections to the pins Jl-1, Jl-2, Jl-3 of the connector Jl , the connections to the pins J2-1, J2-2, J2-3, J2-5 of the connector J2 , the connections to the pins J3-1, J3-2 of the connector J3 (of the 2 -pole vertical male type, for example an AMP MODU1 280609-2, which permits transmission of the signals from and towards the connector Jl and the 36 V supply of the electronic card for the vapour recovery) , and the connections to the pins P4-1, P4-2, P4-3 of a connector P4 of the 3 -pole vertical male type, for example an MSTBVA 2 , 5/3 -G-5 , 0.8 which permits connection at the output to the electric motor 27, since the signals output control the phase.
  • the 2 -pole vertical male type for example an AMP MODU1 280609-2, which permits transmission of the signals from and towards the connector Jl and the 36
  • Figure 5 which relates to a control wiring diagram for a digital brushless motor, shows the pins Pl-1, Pl-2 (relating to the inputs of the pulse generator 20) , Pl- 3, Pl-4 (relating to the outputs of the signalling LED), Pl-5, Pl-6 (relating to the connection of the temperature sensor), Pl-7, Pl-8, Pl-9 (relating to other connections to sensor devices), and Pl-10, Pl-11, P4-1, P4-2 (relating to the direct current supply mains connection) .
  • pins P2-1, P2-2 and.P2-3 relate to connections to the phases of the stator of the brushless motor, whereas the poles P3-1, P3-2, P3-3, P3-4 guarantee the connections to the serial line RS485.
  • the interval of values which each independent variable can assume can be selected such as to cover an appropriate measurable range during the entire supply operation; in addition, the microprocessor 40 uses the same table of values, and updates them for each successive operation of supply of fuel.
  • the independent variables can be selected such as to simulate in the best possible way the conventional operative conditions of a vapour recovery system, during the stage of filling the tank of a vehicle. For this purpose, it is also necessary to provide appropriate characteristics of capacity of the non-volatile memories used.
  • the vapour recovery system 35 monitors as variables the ambient temperature and the volume of fuel distributed.
  • the ambient temperature is measured directly by a temperature transducer, and a corresponding signal is transmitted to the microprocessor 40 of the electronic unit 22, whereas the volume of fuel distributed is determined by measuring the flow, by means of a specific transducer; in fact, during distribution, the generator or pulser 20 - transmits a series of pulses via the head 21, to the microprocessor 40, which stores in its memory the number of pulses which have been counted on completion of the operation of supply to the vehicle, and calculates the volume of fuel distributed on the basis of this number.
  • the microprocessor 40 also continues to receive the signal fed back by the motor 27, in order to obtain accurate speed control of the pump 26, and to compensate for the lack of linearity.
  • the microprocessor 40 of the electronic control unit 22 can also include a timer device, which measures the time interval which elapses between two successive supplies, such that, if this time interval is greater than a specific pre-determined value, and thus the data stored (dependent variables) which relate to the experimental results, and are set on the V/L curve are not very accurate, new values of the variables are measured experimentally and stored in the electronic unit 22.
  • the electronic unit 22 it is possible to store in the electronic unit 22 with a microprocessor 40, a table or matrix with 120 lines and two columns, wherein the first column contains the values relating to the frequency of input (in an interval of frequencies of between 0 and 100 Hz) , corresponding to the signal obtained from the pulse generator 20, and the second column contains a series of output frequency values, corresponding to the number of revolutions at which the suction and vapour recovery pump 26 must function.
  • 120 lines of the matrix are provided, i.e. 20 more than the frequency interval 0-100 Hz, in order to be able to obtain a reasonable margin of regulation.
  • a regulation system of this type makes it possible to correct the characteristic curve of the suction pump 26, and the ratio V/L of the entire recovery system 35 for the vapours, if there is a different head downstream from the system 35.
  • the matrix is inserted in a corresponding non-volatile memory element (for example an EEPROM memory) , integrated in the microprocessor 40, which makes it possible to preserve the data even when power is lacking, and also to be able to modify the data at any time .
  • the matrix is then completed by a series of data obtained experimentally from a sample assembly of suction pumps 26, such that the compensation curve is obtained by interpolation (a process which is carried out by an associated electronic processor) , of some points at which the entire vapour recovery system 35 is tested.
  • the interpolation takes place by means of a corresponding electronic calibration system, which can transfer the results obtained to the control unit 22 of the recovery system 35.
  • the vapour recovery system 35 in question can be regulated by means of a potentiometer (trimmer) present on the electronic card of the system 35, which makes it possible to translate a default curve stored in the microprocessor 40, i.e. which makes it possible, by translating this curve by means of transmission of a datum to the serial gate present on the electronic card of the recovery system 35, to exclude the trimmer function, and enable a register with the same functions as the trimmer.
  • a potentiometer tilt
  • Use of the electronic control device according to the invention can thus limit variation of the critical value required (the ratio V/L) , when there is variation of the possible conditions of operation of the vapour recovery system; in fact, the main variation of the operating condition is caused by variation of the flow rate, which, for a mono-block distributor with a capacity of 50 litres/minute, can be considered variable between approximately 50 and 5 litres/minute.
  • the flow rate which, for a mono-block distributor with a capacity of 50 litres/minute, can be considered variable between approximately 50 and 5 litres/minute.
  • ⁇ V/L V/L max - V/L min.
  • the Cartesian graph in Figure 6 relates to the experimental data for the ratio V/L (as a percentage) , according to a series of values of flow rates (in litres/minute) , which were obtained with a system using a pump with fixed revolutions, controlled mechanically.
  • the latter curve makes it possible to obtain a curve of corrective calibration values to be used in the vapour recovery system according to the present invention, in order linearise the response of the system.
  • the graph in Figure 8 shows the curve of the corrective factors, when there is variation of the point of operation or flow rate Q, which can be used in the recovery system according to the invention: in this case, the number of revolutions of the pump used depends on the flow rate distributed.

Abstract

L'invention concerne un dispositif servant à commander la récupération des vapeurs dans des colonnes de distribution de carburant (10). Ce dispositif comprend une unité électronique (22) à laquelle est associée une série de signaux de références traités en conséquence de façon à rendre pratiquement linéaire la fonction associant le volume de vapeur récupérée par le système de récupération (35) au volume de carburant distribué, cette fonction suivant en fait un développement non linéaire. Par conséquent, il est nécessaire d'introduire une courbe de compensation déterminant la vitesse effective d'un moteur électrique (27) connecté à la pompe (26) pour certaines variables calculées de manière empirique à l'aide d'un étalonnage préalable effectué sur une pompe aspirante (26) et sur la base d'un signal de référence émis vers l'unité de commande (22).
PCT/EP2000/005234 1999-06-10 2000-06-06 Dispositif et procede servant a commander la recuperation des vapeurs dans des colonnes de distribution de carburant WO2000076909A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
AT00943776T ATE250004T1 (de) 1999-06-10 2000-06-06 Vorrichtung und verfahren zum kontrollieren der rückgewinnung von dämpfen in kraftstoff- zapfstellen
MXPA01012822A MXPA01012822A (es) 1999-06-10 2000-06-06 Dispositivo y metodo para controlar la recuperacion de los vapores en columnas de distribucion de combustible.
SK1780-2001A SK17802001A3 (sk) 1999-06-10 2000-06-06 Spôsob regulácie spätného získavania pár v stojanoch na čerpanie paliva
PL00353022A PL353022A1 (en) 1999-06-10 2000-06-06 Device and method for controlling the recovery of the vapours in fuel distributor columns
AU58123/00A AU5812300A (en) 1999-06-10 2000-06-06 Device and method for controlling the recovery of the vapours in fuel distributor columns
DE60005348T DE60005348T2 (de) 1999-06-10 2000-06-06 Vorrichtung und verfahren zum kontrollieren der rückgewinnung von dämpfen in kraftstoff-zapfstellen
BR0011395-6A BR0011395A (pt) 1999-06-10 2000-06-06 Dispositivo e processo para controlar a recuperação dos valores em colunas distribuidoras de combustìvel
EP00943776A EP1192102B1 (fr) 1999-06-10 2000-06-06 Dispositif et procede servant a commander la recuperation des vapeurs dans des colonnes de distribution de carburant
KR1020017015856A KR20020014811A (ko) 1999-06-10 2000-06-06 연료 분배기 칼럼에서 증기회수를 조절하는 장치 및 방법

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI99A001292 1999-06-10
IT1999MI001292A ITMI991292A1 (it) 1999-06-10 1999-06-10 Dispositivo e procedimento per il controllo del recupero dei vapori nelle colonnine dei distributori di carburante

Publications (1)

Publication Number Publication Date
WO2000076909A1 true WO2000076909A1 (fr) 2000-12-21

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PCT/EP2000/005234 WO2000076909A1 (fr) 1999-06-10 2000-06-06 Dispositif et procede servant a commander la recuperation des vapeurs dans des colonnes de distribution de carburant

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EP (1) EP1192102B1 (fr)
KR (1) KR20020014811A (fr)
CN (1) CN1356959A (fr)
AR (1) AR024311A1 (fr)
AT (1) ATE250004T1 (fr)
AU (1) AU5812300A (fr)
BR (1) BR0011395A (fr)
CZ (1) CZ20014332A3 (fr)
DE (1) DE60005348T2 (fr)
ES (1) ES2206266T3 (fr)
HU (1) HUP0201523A2 (fr)
IT (1) ITMI991292A1 (fr)
MX (1) MXPA01012822A (fr)
PL (1) PL353022A1 (fr)
RU (1) RU2250195C2 (fr)
SK (1) SK17802001A3 (fr)
TR (1) TR200103554T2 (fr)
TW (1) TW464627B (fr)
WO (1) WO2000076909A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020142021A3 (fr) * 2018-12-31 2020-08-06 Mepsan Petrol Ci̇hazlari San. Ve Ti̇c. A.Ş. Système de pompe à retour de vapeur intelligente

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2924706B1 (fr) * 2007-12-05 2012-10-19 Tokheim Holding Bv Installation de distribution de carburant renfermant un dispositif de recuperation de vapeurs ainsi que procede mis en oeuvre lors de l'utilisation de cette installation.
FR2955658B1 (fr) * 2010-01-25 2012-11-02 Tokheim Holding Bv Dispositif de jaugeage d'un appareil distributeur de carburant liquide ainsi que procede mis en oeuvre lors de l'utilisation d'un tel dispositif

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038838A (en) 1989-01-04 1991-08-13 Nuovopignone-Industrie Meccaniche E Fonderia S.P.A. System for safe vapour recovery, particularly suitable for fuel filling installations
DE4200803A1 (de) * 1992-01-15 1993-07-22 Riba Prueftechnik Gmbh Verfahren und vorrichtung zum absaugen und rueckfuehren eines gases von einer fluessigkeits-zapfstelle
EP0461770B1 (fr) 1990-05-21 1995-04-19 Gilbarco Inc. Système de distribution de liquide avec dispositif de récupération de vapeurs et liquides
WO1996006038A1 (fr) * 1994-08-22 1996-02-29 Gilbarco Limited Systeme de recuperation de vapeurs destine a un systeme de distribution de carburant
WO1998000641A1 (fr) * 1996-06-28 1998-01-08 Franklin Electric Co., Inc. Recuperateur de vapeur de carburant
GB2336583A (en) * 1998-04-24 1999-10-27 Solutions Serv Syst France Vapour recovery method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5038838A (en) 1989-01-04 1991-08-13 Nuovopignone-Industrie Meccaniche E Fonderia S.P.A. System for safe vapour recovery, particularly suitable for fuel filling installations
EP0461770B1 (fr) 1990-05-21 1995-04-19 Gilbarco Inc. Système de distribution de liquide avec dispositif de récupération de vapeurs et liquides
DE4200803A1 (de) * 1992-01-15 1993-07-22 Riba Prueftechnik Gmbh Verfahren und vorrichtung zum absaugen und rueckfuehren eines gases von einer fluessigkeits-zapfstelle
WO1996006038A1 (fr) * 1994-08-22 1996-02-29 Gilbarco Limited Systeme de recuperation de vapeurs destine a un systeme de distribution de carburant
WO1998000641A1 (fr) * 1996-06-28 1998-01-08 Franklin Electric Co., Inc. Recuperateur de vapeur de carburant
GB2336583A (en) * 1998-04-24 1999-10-27 Solutions Serv Syst France Vapour recovery method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020142021A3 (fr) * 2018-12-31 2020-08-06 Mepsan Petrol Ci̇hazlari San. Ve Ti̇c. A.Ş. Système de pompe à retour de vapeur intelligente

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BR0011395A (pt) 2002-03-05
AU5812300A (en) 2001-01-02
ITMI991292A0 (it) 1999-06-10
EP1192102A1 (fr) 2002-04-03
ITMI991292A1 (it) 2000-12-10
MXPA01012822A (es) 2003-06-24
PL353022A1 (en) 2003-10-06
TW464627B (en) 2001-11-21
RU2250195C2 (ru) 2005-04-20
KR20020014811A (ko) 2002-02-25
CN1356959A (zh) 2002-07-03
SK17802001A3 (sk) 2002-10-08
ES2206266T3 (es) 2004-05-16
TR200103554T2 (tr) 2002-05-21
HUP0201523A2 (en) 2002-08-28
DE60005348D1 (de) 2003-10-23
CZ20014332A3 (cs) 2002-05-15
AR024311A1 (es) 2002-09-25
DE60005348T2 (de) 2004-07-08
ATE250004T1 (de) 2003-10-15
EP1192102B1 (fr) 2003-09-17

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