CN86101251A

CN86101251A - Fuel system

Info

Publication number: CN86101251A
Application number: CN86101251.8A
Authority: CN
Inventors: 粕谷淳
Original assignee: DANOKISHINA Ltd
Current assignee: DANOKISHINA Ltd
Priority date: 1985-02-12
Filing date: 1986-02-06
Publication date: 1986-10-15
Also published as: GB8603416D0; MY101951A; AU5331186A; CN1006458B; GB2170782A; JPH0637235B2; JPS61190494A; AU569818B2; GB2170782B

Abstract

A kind of fuel supply device comprises: fill with device, be used for a kind of finish and stop with the ad hoc fashion fuel supplying fuel supply be by shutdown feature rather than situation by the filling oil nozzle under, fuel is filled with flexible pipe; Memory unit, be used to store as correcting value and fill with the fuel quantity of flexible pipe by filling with device; Correct equipment is used for deducting the correcting value of reading from memory unit, thereby obtaining a calibrated fuel duty by from a needed fuel quantity with the ad hoc fashion supply; And be used for when supply reaches calibrated fuel duty, by starting the supply shutdown feature, stop fuel supply.

Description

Fuel system

The present invention relates generally to fuel system, more specifically, relate to a kind of fuel system that is used to have the feeding mechanism of pluralities of fuel method of supplying, can be during fuel supplying in a predetermined manner, fuel quantity accurately is provided, and no matter which kind of mode is a preceding fuel supply mode be.

Usually, fuel supply device can be to insert the mode fuel supplying in advance.According to this device, insert required fuel quantity or price in advance, and then, provide predetermined fuel according to this fuel quantity or price.In general, this device comprise a pump, flow counter, fuel supply irritate oil nozzle, flow signal producer, telltale, one insert switch and fuel supply shutdown feature in advance.Pump is positioned on the middle part of pipeline, and an end of pipeline leads in the tanks and goes.Fuel supply is irritated oil nozzle and is linked to each other with the other end of pipeline by a fuel supply flexible pipe.The flow signal producer sends a flow signal according to the fuel quantity that flow counter measures.The flow signal that telltale sends according to the flow signal producer shows the supplied fuel amount.Insert switch in advance and be used for preestablishing required fuel duty, required fuel will provide to insert mode in advance.When supplied fuel reaches when inserting the amount that switch sets in advance, the fuel supply shutdown feature stops to irritate oil nozzle from fuel supply and confesses fuel.The fuel supply shutdown feature is made of an electrical motor that is used for driving pump, or is made of stop valve in the pipeline or like.

Generally speaking, beginning and stop fuel supply is to be finished by the valve that opens and closes fuel supply filling oil nozzle.Yet under the situation of inserting fuel supply in advance, the beginning fuel supply is to be finished by the valve of opening fuel supply filling oil nozzle, stops fuel supply and is but finished by the fuel supply shutdown feature.In other words, during inserting fuel supply in advance,, fuel supply is interrupted by for example stopping to drive pump motor or closing stop valve in the pipeline.In addition, fuel supply is irritated the valve of oil nozzle and is being opened, and just closes after finishing when inserting the fuel supply operation in advance.Owing to this reason, during inserting fuel supply in advance, even when the fuel supply shutdown feature stops fuel supply, fuel supply is irritated the valve of oil nozzle and is still being opened, so the Fuel Tank that the flexible pipe between fuel supply shutdown feature and the fuel supply filling oil nozzle and ducted a part of fuel will flow into vehicle.When inserting in advance after fuel supply finishes of reality, flow into the fuel quantity of vehicle fuel tank by this way, depend on the length of pipeline and flexible pipe, concerning each fuelling station, this has nothing in common with each other.Usually, this fuel quantity is 0.1 to rise to 0.5 liter.For example, under the situation that twice fuel supply is carried out by different way in succession, if a preceding method of supplying for inserting mode in advance, and preceding method of supplying is common mode, then Shi Ji fuel duty can produce a little error.

In other words, if twice fuel supply mode all is common mode in succession, then each fuel duty equals to irritate the amount that oil nozzle is opened to the down periods supply from fuel supply, and for twice fuel supply in succession, the actual provision amount that shows on telltale is consistent.On the other hand, if a preceding fuel supply mode is for inserting mode in advance, and present fuel supply mode is a common mode, then when beginning common mode fuel supplying, need fill with preceding once presetting and finish the back into the fuel supply operation and become the empty a part of pipeline and the fuel quantity of flexible pipe, will irritate the oil nozzle valve open in fuel supply and be measured by flow metering before operating to carry out the common mode fuel supply by driving pump.Therefore, irritate the natural fuel amount of oil nozzle valve open to the down periods supply from fuel supply, less than the fuel quantity that shows on the telltale, its difference need be used for being full of the empty fuel quantity partly of change of pipeline and flexible pipe when fuel supplying begins in normal way.

If twice fuel supply mode is all for inserting mode in advance in succession, then when the second time, fuel supplying began, need be used for being full of the change sky fuel quantity partly of pipeline and flexible pipe, the fuel quantity that flows out fuel supply filling oil nozzle in this time supply back is identical with finishing.In other words, the actual fuel quantity that provides equals the fuel quantity that shows by chance.On the other hand, if previous fuel supply mode is a common mode, and present fuel supply mode is for inserting mode in advance, then irritate the oil nozzle valve open and irritate the natural fuel amount of supplying during the oil nozzle valve closing to work of fuel supply shutdown feature and fuel supply afterwards from fuel supply, greater than the fuel quantity that shows on the telltale, its difference flows out the fuel quantity of section of tubing and flexible pipe for when inserting the mode fuel supplying in advance and finish.

Same problem also appears among the fuel supply device that can carry out integer number fuel supply operation.The structure of this device and aforementioned can to carry out the device of inserting fuel supply operation in advance basic identical, just the integer number assigned switch has replaced inserting in advance switch.Handle the integer number assigned switch in the fuel supply process, then when fuel duty (or price) reached integer number (or price), the fuel supply shutdown feature was just worked, so that stop fuel supply.Fuel duty when for example, this integer number (or price) is slightly larger than the connection of integer number assigned switch.Therefore, if a preceding fuel supply mode is the integer number mode, and present fuel supply mode is a common mode, then when beginning common mode fuel supplying, need fill with and finish the back in preceding integer number mode fuel supply operation and become the empty a part of pipeline and the fuel quantity of flexible pipe, will be measured by flow metering before operating to carry out the common mode fuel supply at valve open that oil nozzle is irritated in fuel supply by driving pump.Therefore, irritate the fuel quantity that the oil nozzle valve open shows less than telltale to the natural fuel amount of down periods supply from fuel supply, its difference need be used for filling with the empty fuel quantity partly of change of pipeline and flexible pipe when fuel supplying begins in normal way.

So, when a fuel supply device with pluralities of fuel method of supplying is carried out previously selected fuel supply operation, just there is such problem, be to be different from the method that is adopted during the fuel supply thereafter in order to the method that stops fuel supply during the current primary fuel supply, then can not provide fuel quantity accurately, for example, during a preceding fuel supply, adopt the fuel supply shutdown feature to stop fuel supply, stop fuel supply, so the problems referred to above will take place and during fuel supply thereafter, adopt fuel supply to irritate the oil nozzle valve.

Therefore, the present invention will provide fuel system a kind of Nover practical, that eliminated all problems of discussing so far.

Of the present invention another more specifically purpose provide a kind of fuel system, it comprises: fill with device, be used for a kind of that to finish and stop fuel supply be by the fuel supply shutdown feature rather than irritate by fuel supply under the situation of oil nozzle, with fuel filled with fuel supply hose with specific fuel supply mode fuel supplying; Memory unit, be used to store as correcting value and by filling with the fuel quantity of device with its filled with fuel supply hose; Correct equipment, be used for by from a needed fuel quantity with ad hoc fashion supply, deduct the correcting value of reading from memory unit, thereby obtain a calibrated fuel duty, and be used for when supply reaches calibrated fuel duty, by starting fluid supply shutdown feature, stop fuel supply.Fuel system of the present invention can provide fuel quantity accurately, and no matter which kind of mode is the previous fuel level mode of answering be.

Other purposes of the present invention and more characteristics will be passed through following detailed in conjunction with the accompanying drawings, become very clear.

Figure 1A, 1B, 1C and 1D represent the various combination for two kinds of fuel supply modes in succession respectively, natural fuel supply in traditional fuel system and the relation between the demonstration amount on the telltale;

Fig. 2 represents to mix an example of the fuel supply device of fuel system of the present invention;

Fig. 3 is an overall system block diagram, is illustrated in the embodiment of a kind of control setup in the fuel system of the present invention;

Fig. 4 A to 4C is the diagram of circuit in order to an embodiment of the processing unit service condition in the control setup of instruction diagram 3;

Fig. 5 (A) to (F) is the time diagram of inserting the fuel supply operation in advance in order to illustrate;

Fig. 6 is the diagram of circuit in order to another embodiment of the processing unit service condition in the control setup of instruction diagram 3;

Fig. 7 is the time diagram in order to explanation integer number fuel supply operation.

As previously mentioned, the operation of fuel supplying is irritated the end of oil nozzle valve by closing fuel supply in normal way.Therefore, if preceding once the carrying out in normal way of twice fuel supply operation in succession also leaves fuel in the fuel supply flexible pipe so.Based on this reason, if twice fuel supply operation in succession after once also carry out in normal way, even so at moment T ₁(shown in Figure 1A) driving pump, fuel flow counter of also can not flowing through, and at moment T ₂When opening fuel supply filling oil nozzle valve, the fuel supply meeting begins immediately.As a result, moment T ₂To T ₃The natural fuel amount that oil nozzle is confessed is irritated in fuel supply during this time, equals the fuel quantity of flow counter of flowing through, and shows on telltale, and the two does not have difference.

Yet, for example irritate under the situation of oil nozzle unlatching, to insert mode in advance or to finish by stopping driving pump with integer number mode fuel supplying in fuel supply.When the preceding of twice fuel without interruption once carries out to insert mode in advance, because having flowed through fuel supply filling oil nozzle the fuel in the fuel supply flexible pipe, its end goes out, so this flexible pipe is empty.After fuel supply for the first time finishes, close fuel supply and irritate the oil nozzle valve.Thereby, behind twice fuel without interruption, once carry out in normal way and at moment T ₁Driving pump, the fuel flow counter of will flowing through so is up to moment T ₄Till the fuel filled with fuel supply hose, shown in Figure 1B.In other words, from moment T ₁To T ₄The fuel quantity that flows through is during this time measured by flow metering.As a result, irritate the oil nozzle valve at moment T when fuel supply ₂Open, so that beginning is when carrying out the supply of back primary fuel in normal way, owing to from moment T ₁To T ₄Existing during this time fuel is filled with the fuel supply flexible pipe, so the fuel quantity shown in Figure 1A is prior to moment T ₃Moment T ₅Just reached.Therefore, even the fuel duty that shows on the telltale equals the amount shown in Figure 1A, and the actual provision amount only equals from moment T ₂To T ₅Supply, less than the supply shown in Figure 1A.

Twice continuous fuel supply mode all is to insert in advance under the situation of mode, and back single job is at moment T ₁Begin by driving pump, to moment T ₄Till flow through the fuel of flow counter shown in Fig. 1 C.Yet, as moment T ₅Stop pump, so that finish to insert the mode fuel supplying in advance, then the fuel in the fuel supply flexible pipe will flow out fuel supply filling oil nozzle, until moment T ₃The ability time.As a result, Shi Ji fuel duty equals the demonstration amount on the telltale.

In addition, when the preceding of twice fuel without interruption once carries out in normal way, then once for inserting mode in advance, and in moment T ₁Driving pump, the fuel flow counter of not flowing through.Yet, when at moment T ₃Pump stops, and the fuel in the fuel supply flexible pipe still can be irritated the oil nozzle from fuel supply and be flowed out, up to moment T ₆Till, shown in Fig. 1 D.As a result, the fuel duty that shows on the telltale is moment T ₂To T ₃Supply during this time, and the actual provision amount is moment T ₂To T ₆Supply during this time.In other words, Shi Ji fuel duty in this case is greater than the demonstration amount of telltale.

The present invention has eliminated the problems referred to above that traditional fuel system exists, and in other words, makes the natural fuel supply consistent with demonstration amount on the telltale, and respectively is what mode regardless of twice fuel supply in succession.

The example that can mix the fuel supply device of fuel system of the present invention is shown in Fig. 2.

As Fig. 2, a kind of fixed type fuel supply device 11 generally includes a lower box 12 and a upper box 13.One pipeline 14 is arranged in the lower box 12, and its end is irritated the (not shown) that links to each other with fuel.The pump 16 that is driven by electrical motor 15, the flow counter 17 and the switch electromagnetic valve 18 that are used for measuring the supplied fuel amount are installed in pipeline 14 respectively.As later on will be setting forth in the specification sheets, valve 18 comprises main solenoid valve 18A and pilot solenoid valve 18B, and main solenoid valve allows a large amount of fuel to flow through under opening, and fuel flows through and pilot solenoid valve allows in a small amount under opening.Flow signal producer 19 is installed on the flow counter 17, and in order to produce a flow signal, this signal is directly proportional with the fuel quantity that flow counter 17 measures.Fuel supply flexible pipe (hereinafter to be referred as flexible pipe) 20 links to each other with the other end of pipeline 14, and fuel supply is irritated oil nozzle (hereinafter to be referred as irritating oil nozzle) 21 and is installed in the top of flexible pipe 20.In fuel supplying not, irritate oil nozzle 21 and be placed on and irritate on the oil nozzle carriage (hereinafter to be referred as carriage) 22.Carriage 22 is equipped with switch 23, and when irritating oil nozzle 21 when carriage 22 is taken away, switch 23 is connected; When filling oil nozzle 21 was placed on the carriage 22, switch 23 disconnected.When switch 23 is connected, electrical motor 15 entrys into service, and valve 18 is opened.Otherwise when switch 23 disconnected, electrical motor 15 shut down.

Telltale 24 is contained in the front of upper box 13, and it comprises the display part 25 that is used for showing the supplied fuel price, is used for showing the telltale part 26 of supplied fuel amount, and the telltale part 27 that is used for showing the fuel unit price.Insert the side that device is contained in upper box 13 in advance by what insert in advance that switch 28 constitutes.Insert switch in advance and comprise

button

28A, 28B, 28C, 28D and 28E, can be respectively applied for and insert the supplied fuel amount in advance, for example 10,15,20,30 and 40 liters.Unit price is inserted part 29 and is used to insert the fuel unit price, and control setup 30 will be afterwards in conjunction with Fig. 3 explanation, and they also all are contained in the upper box 13.The button 28A to 28E that inserts switch 28 in advance also can be designed for inserting in advance respectively the price that provides fuel required, and for example 1000,1500,2000,3000 to 4000 yen, rather than be used for inserting in advance the fuel quantity that provides.In addition, inserting switch 28 in advance also can adopt dial or 10 numeric keys to replace button 28A to 28E.Moreover, insert switch 28 in advance and can also adopt card reader, being used for reading from card will supplied fuel amount or fuel price.The position of inserting device in advance is not limited in the side of upper box 13, also can be installed in the office of fuelling station or other are any local easily.

Below, with reference to an embodiment of figure 3 explanation control setups 30.Control setup 30 generally includes a processing unit (as central process unit) 31, read-only memory (ROM) (ROM) 32, random-access memory (ram) 33, display control circuit 34, input/output circuitry 35, motor drive circuit 36, and solenoid valve control circuit (hereinafter to be referred as valve controling circuit) 37.The job procedure of read-only memory (ROM) 32 storage map 4A to 4C.The amount of inserting in advance of random access reservoir 33 fuel-in-storages, actual provision amount and the correcting value (correcting value will illustrate afterwards) under processing unit 31 controls.34 pairs of display control circuits are controlled at the supplied fuel amount of the telltale part 25 to 27 of telltale 24 and the demonstration of similar content.Motor drive circuit 36 links to each other with the mouth of input/output circuitry 35, and under the control of processing unit 31 driving motor 15.Valve controling circuit 37 links to each other with the mouth of input/output circuitry 35, the opening and closing of decision main valve 18A and auxiliary valve 18B.Processing unit 31, read-only memory (ROM) 32, random access memory 33, display control circuit 34, input/output circuitry 35 connect mutually by data bus 38.The output of flow signal producer 19 links to each other with the middle broken ends of fractured bone int of processing unit 31, and to the flow signal-count, this will be illustrated processing unit 31 afterwards according to the diagram of circuit of Fig. 4 C.Irritate oil nozzle switch 23 and insert switch 28 and link to each other with the input end of input/output circuitry 35 respectively,

switch

23 and 28 output enter processing unit 31 by input/output circuitry 35.

The situation of fuel supplying in normal way at first is described, it is inoperative at this moment to insert switch 28 in advance.

When irritating oil nozzle 21 when carriage 22 is taken away, to irritate oil nozzle switch 23 and connect, expression is irritated the output signal that oil nozzle switch 23 connects and is entered processing unit 31 by input/output circuitry 35.As a result, processing unit 31 provides a motor start-up signal to motor drive circuit 36, so that actuating motor 15.In addition, processing unit 31 provides a valve opening signal to valve controling circuit 37, so that open main valve 18A and auxiliary valve 18B.Processing unit 31 also provides a reset signal to random access memory 33, makes the segment count PCOUNT zero clearing in the random access memory 33.Like this, by display control circuit 34, vanishing is counted in the previous demonstration on the telltale part 25 and 26.When filling oil nozzle 21 inserted the Fuel Tank (not shown) of vehicle (not shown) and opens the valve of irritating oil nozzle 21, the fuel in the storage tank (not shown) flowed out from irritating oil nozzle 21 through piping 14, pump 16, flow counter 17, valve 18, flexible pipe 20.The fuel flow that is provided is measured by flow counter 17, passes to processing unit 31 from the flow signal that flow signal producer 19 sends.Processing unit 31 is carried out interrupt routine (step S25 to S27 is shown in Fig. 4 C), and the counting region PCOUNT in random access memory 33 is to the flow signal-count.The count signal (value) that counting region PCOUNT comes from random access memory 33 add to display control circuit 34 and according to=-+the ary codes system is converted to the signal specification that is suitable for telltale 24.The signal that this process has been changed adds to the

display part

25 and 26 of telltale 24 through circuit of display driving (not shown, for example in display control circuit 34), is used for showing in succession institute's supplied fuel amount and price.

When supplied fuel reaches required amount, irritate oil nozzle 21 and put back on the carriage 22, irritate oil nozzle switch 23 and turn-off.Processing unit 31 provides a motor stop signal to motor drive circuit 36, so that stop electrical motor 15.In addition, processing unit 31 also provides a valve closing signal to valve controling circuit 37, so that close main valve 18A and auxiliary valve 18B.

The process of fuel supplying is so far set forth and is finished in normal way, and this and traditional fuel system are basic identical.

The following describes to insert mode in advance and come fuel supplying, at this moment use and insert switch 28 in advance.

At first, before the actual fuel supply of beginning, the required fuel quantity that will supply (amount of inserting in advance) is inserted in advance by inserting out 28 in advance.For example, when 20 liters of fuel of customer need, just press button 28C.So processing unit 31 is from the step S shown in Fig. 4 A ₀Start working step S ₁The storage amount of inserting P in advance, this in advance the amount of inserting P insert in advance among the storage area of the amount of inserting the in advance PRESET of random access memory 33 by inserting switch 28 in advance through input/output circuitries 35.

Following step S ₂To being stored in the preceding fuel duty zero clearing among the counting region PCOUNT in the random access memory 33; Make the demonstration vanishing of

telltale part

25 and 26; To be worth X(=P-A) insert the first storage area V1STOP of the random access memory 33 of the closing information that is used for storing main valve 18A, X deducts constant A by the P of the amount of inserting in advance that stores among the amount of the inserting storage area PRESET in advance to obtain; To be worth Y(=P-B-C) insert the second storage area V2STOP of the random access memory 33 of the closing information that is used for storing auxiliary valve 18B, Y deducts constant B and compensation value (amount) C that is stored among the correcting value storage area ADDPLS of random access memory 33 obtains by the amount of inserting P in advance.In order to improve accuracy of measurement, valve-off 18 carries out in two steps, closes main valve 18A earlier, after close auxiliary valve 18B.For example, value A elects several liters as, and consequently being closed to the second step auxiliary valve from first step main valve has several fuel that rise to flow through within the shut.The B value is for after auxiliary valve 18B closes, and the excess of fuel that flows through for example generally rises between 0.3 liter 0.1 and selects.Correcting value C precedingly need be used for filling with the fuel quantity of flexible pipe 20 once with after inserting the mode fuel supplying in advance and finishing, and it is a changing value, for example 0.1 rises to 0.5 liter.

After the amount of inserting is inserted in the above described manner in advance in advance, when irritating oil nozzle 21 as above-mentioned fuel supplying in normal way, take away from carriage 22.Therefore, irritate oil nozzle switch 23 and connect, the output signal that 23 connections of oil nozzle switch are irritated in expression enters processing unit 31 by input/output circuitry 35.As a result, at step S ₃, processing unit 31 provides a motor start-up signal to motor drive circuit 336, so that actuating motor 15.At step S ₄, provide a valve opening signal to valve controling circuit 37, so that open main valve 18A and auxiliary valve 18B.In this case, after filling oil nozzle 21 inserted the Fuel Tank of vehicles and opens the valve of irritating oil nozzle 21, the fuel in the storage tank flow to Fuel Tank from irritating oil nozzle 21.The flow fuel that is provided is measured by flow counter 17, the flow signal that sends from flow signal producer 19 pass to processing unit 31 broken ends of fractured bone int.So processing unit 31 is carried out interrupt routines (step S25 to S27 is shown in Fig. 4 C), in the PCOUNT of the counting region of random access memory 33 to the flow signal-count.The count signal (value Q) that comes from the counting region PCOUNT of random access memory 33 adds to the

display part

25 and 26 of telltale 24 by display control circuit 34, in order to show institute's supplied fuel amount and price in succession.

Step S ₅Judge the value Q(supplied fuel amount among the PCOUNT of counting region) whether more than or equal to the value X(=P-A among the first storage area V1STOP).Q on duty does not also reach value X, then step S ₅Judged result be "No", step S ₆Showing supplied fuel amount (the value Q in the PCOUNT of counting region) on the telltale 24.Step S ₇Judge whether irritate oil nozzle switch 23 turn-offs.Be placed under the situation of carriage 22 step S at filling oil nozzle 21 ₇The result who judges is a "Yes", and judges during fuel supply, and the fuel supply mode has become common mode.Therefore, as step S ₇Judged result be "Yes", the step S23 shown in Fig. 4 B stops electrical motor 15, step S24 finishes fuel supply.Otherwise, if step S ₇Judged result be "No", then program is got back to step S ₅Q(supplied fuel amount on duty) reaches value X, step S ₅The result who judges becomes "Yes", then step S ₈Provide a main valve closing signal to valve controling circuit 37, close main valve 18A.So the big flow fuel of the pipeline 14 of flowing through is kept to low discharge fuel.

Next, step S ₉Judge the value Q(supplied fuel amount among the PCOUNT of counting region) whether more than or equal to the value Y(=P-B-C among the second storage area V2STOP).Q on duty does not also reach Y value, then step S ₉Judged result be " "No", execution in step S ₁₀And S ₁₁Step S ₁₀And S ₁₁With abovementioned steps S ₆And S ₇Basic identical.Otherwise, as step S ₉Judged result be "Yes", step S then ₁₂Provide an auxiliary valve closing signal to valve controling circuit 37, close auxiliary valve 18B.As a result, stopped fuel supply.

At step S ₁₂In the auxiliary valve closing signal is offered after the valve controling circuit 37 step S ₁₃Carry out the addition program, with preceding once to insert the correcting value C and value Q(supplied fuel amount that is stored in the mode fuel supplying process among the compensation value storage area ADDPLS in advance) addition, add the result exist among the PCOUNT of counting region.Illustrated as the front in conjunction with Fig. 1 D, inserting in advance under the fuel supply mode, even after auxiliary valve 18B closes, the fuel in flexible pipe 20 and the pipeline 14 also wants excess to flow out, in order to measure fuel duty accurately, must consider this fuel quantity that has more.Why Here it is carries out the reason of addition at step S13.Step S14 shown in Fig. 4 B shows the result of the existing addition of counting region PCOUNT on display part 25 and 26.Fig. 5 A represents that the result of above-mentioned addition represents with dash area to insert the flow characteristic of mode fuel supplying in advance.Therefore, obtain the high-precision required fuel quantity P that inserts in advance.

Next,, irritate oil nozzle switch 23 and turn-off, represent that the output signal of its shutoff enters processing unit 31 through input/output circuitry 35 when the operator will irritate after oil nozzle 21 is placed on the carriage 22.Step 15 judges that whether irritate oil nozzle switch 23 turn-offs, and promptly irritates oil nozzle 21 and whether has been placed on the carriage 22.The result who judges as step S15 is a "Yes", and then in order to measure the fuel quantity that need be used for filling with flexible pipe 20, step S16 is with the value Q zero setting among the PCOUNT of counting region.Yet institute's supplied fuel amount is stored in the energy disperser (not shown) that provides separately, and like this, display

part

25 and 26 still keeps original state, just zero clearing when carrying out the operation of fuel supply next time.As can and 5(C) finding out from Fig. 5 (B), under with the situation of inserting the mode fuel supplying in advance, even irritate after oil nozzle switch 23 turn-offs, electrical motor 15 also continues at t ₁Running in time.The shutoff and the turnon time of oil nozzle switch 23 irritated in Fig. 5 (B) expression, and Fig. 5 (C) expression electrical motor 15 starts and standing time, and Fig. 5 (D) expression main valve 18A opens and closes the time.

In this case, step 17 is at predetermined short time t ₂In, provide the auxiliary valve opening signal to valve controling circuit 37, so that at time t ₂In, open auxiliary valve 18B, shown in Fig. 5 (E).The opening and closing time of Fig. 5 (E) expression auxiliary valve 18B.Time t ₂Value be chosen such that so that this section in the period after the fuel in flexible pipe 20 when inserting the mode fuel supplying in advance flow to end, fuel can be refilled flexible pipe 20.For example, time t ₂Usually selected in the scope at 0.5 second to 1.0 seconds,, it is sticked out so that fuel is filled with flexible pipe.When to pipeline 14 and flexible pipe 20 transfer the fuels so that when filling with flexible pipe 20, the fuel quantity that is provided is measured by flow counter 17.Therefore, the flow signal that flow signal producer 19 produces adds to processing unit 31, and in the PCOUNT of the counting region of random access memory 33 to the flow signal-count.

Under with the situation of inserting the mode fuel supplying in advance, when the supplied fuel amount reaches in advance the amount of inserting, valve 18 SELF CL.Owing to this reason, during unlike fuel supplying in normal way, the operator will begin and stop fuel supply by opening and closing the valve of irritating oil nozzle 21, to insert in advance after the mode fuel supplying finishes, the operator can be placed on the carriage 22 irritating oil nozzle 21, and need not notice whether the valve of irritating oil nozzle 21 is still being opened.Situation about at the valve open of irritating oil nozzle 21 when filling oil nozzle 21 is placed down on the carriage 22, and irritating oil nozzle 21 takes away from carriage 22, when beginning fuel supply next time, irritate oil nozzle switch 23 driving pumps 16 by connecting, this just exists a kind of like this danger, promptly irritating oil nozzle 21 from the moment that carriage 22 is taken away, fuel can flow out from irritating oil nozzle 21.Therefore, as a kind of safety inspection measure, whether processing unit 31 is judged to insert in advance after the mode fuel supplying finishes, is irritated the valve of oil nozzle 21 and close.In other words, step 18 is judged at time t ₂Under the situation that interior auxiliary valve 18B opens, whether fuel duty (the value Q among the PCOUNT of counting region) is less than predetermined value K.Because at time t ₂Under the situation that interior auxiliary valve 18B opens, fuel duty is 0.1 to rise to 0.5 liter, thus set predetermined value K for example be 1.0 liters just enough.The result who judges when step 18 is a "No", and then step S19 provides a fault display signal to display control circuit 34, so make the demonstration of

display part

25 and 26 glimmer.Step S20 judges whether irritate oil nozzle switch 23 turn-offs.Therefore, demonstration on the

display part

25 and 26 continues flicker, is placed on the carriage 22 up to valve closing of irritating oil nozzle 21 and filling oil nozzle 21, and this is because the judged result of step S20 becomes "Yes", then step S21 stops to provide fault display signal, and the result makes the display part stop flicker.After the step S21, algorithm is got back to step S16 again, so that repeating step S16 is to S18.Therefore, carry out safety inspection, after determining that inserting the mode fuel supply in advance finishes, irritate the valve of oil nozzle 21 and whether still opening by the loop that step S18 to S21 constitutes.The valve open and the shut of oil nozzle 21 irritated in Fig. 5 (F) expression.

When the judged result of step S18 is a "Yes", then step S22 transfers to correcting value storage area ADDPLS with the value Q among the PCOUNT of counting region, and will be worth Q and be stored among the correcting value storage area ADDPLS as correcting value C.Be stored among the correcting value storage area ADDPLS this correcting value C as next time with during inserting the mode fuel supplying in advance, as the correcting value C among the step S2 of Fig. 4 A, and no matter twice with the operation of inserting the mode fuel supplying in advance between, carry out the how many times operation of fuel supplying in normal way.Correcting value C represents with dash area b in Fig. 5 (A).

After the storage of correcting value C was finished, step S23 provided a motor stop signal to motor drive circuit 36, so that stop electrical motor 15, step S24 finishes to insert the mode fuel supplying in advance.

In the embodiment that describes up to now, step S16 and S17 formation are filled with device, are used to provide fuel to fill with flexible pipe 20; Step S18 and S22 constitute memory unit, are used to store correcting value C.Step S2 constitutes correct equipment, is used to proofread and correct by inserting the P of the amount of inserting in advance that switch 28 is inserted in advance in advance, and its method is from deducting correcting value C the amount of the inserting P in advance.Whether the positive S21 of step S18 constitutes detecting device, is used for detecting after finishing with the preset mode fuel supplying, irritate the valve of oil nozzle 21 and close.

Below, another embodiment of the working process of processing unit 31 is described with reference to Fig. 6.The characteristics of this programme are to be used for being made of electrical motor 15 with the fuel supply shutdown feature of inserting the mode fuel supplying in advance replacement valve 18.In other words, when material supply shutdown feature was worked certainly, electrical motor 15 shut down, so that stop fuel supply.Therefore, in the present embodiment, there is no need main valve 18A and auxiliary valve 18B are installed in pipeline 14, stop fuel supply and finish rather than two steps with a step.

Among Fig. 6, the working process of processing unit 31 is from step S29, and the step S30 amount of inserting P in advance is stored among the storage area of the amount of inserting the in advance P PRESET of random access memory 33.Step S31 will be stored in the preceding fuel duty zero clearing among the random access memory 33 counting region PCOUNT, and will be worth Z(=P-D-C) storage advances to be used among storage area MSTOP Stop message, random access memory 33 of store electricity motivation 15, and value Z is obtained by the correcting value C that the amount of inserting P in advance deducts among constant D and the compensation value storage area ADDPLS.Value D is equivalent to after driving to electrical motor 15 stops, because the fuel quantity that rotation provided that its inertia causes.Next, step S32 provides a motor start-up signal to motor drive circuit 36, so that starter motor 15.Carry out the step S33 to S35 similar to abovementioned steps S5 to S7, when step S33 judgment value Q(fuel duty) during more than or equal to the value Z that is stored among the storage area MSTOP, step S36 provides a motor stop signal to motor drive circuit 36, so that stop electrical motor 15.Carry out the step S37 to S40 similar to abovementioned steps S13 to S16 then, step S41 is at the predetermined t of time in short-term ₃In, provide the motor start-up signal to motor drive circuit 36, so that at t ₃In make electrical motor 15 running, and make flexible pipe 20 filled with fuel.After, carry out the step S42 to S47 similar to abovementioned steps S18 to S22 and S24.Remaining working process is identical with previous embodiments basically, repeats no more here.

In the embodiment of explanation so far, when with after inserting the mode fuel supplying in advance and finishing, fuel is filled with flexible pipe, the fuel quantity that in preceding fuel supply operation, needs to be used for filling with flexible pipe, as correction, and with the amount of inserting in advance of inserting the mode fuel supplying in advance, deduct this correction from next time.Therefore, no matter how twice fuel supply is in succession respectively carried out, during fuel supply, can both obtain fuel quantity accurately.

Below, illustrate that fuel system according to the present invention is used for carrying out the situation of carrying out the fuel supply device of fuel supply in the integer number mode.This device can adopt and control setup shown in Figure 3 30 essentially identical control setups, yet the switch of being represented by the dotted line among Fig. 3 40 replaces inserting switch 28(in advance or except that inserting switch 28 in advance, adding switch 40).When with integer number mode fuel supplying, use switch 40, for example, switch 40 be contained in irritate oil nozzle 21 near.During the fuel supply, when using switch 40, it provides an output signal, and enters processing unit 31 by input/output circuitry 35.Processing unit 31 provides a signal, be used for when supplied fuel reaches integer number (or integer price), the fuel supply device that control is reacted to the output signal of switch 40, this integer number (or integer price) are slightly larger than supplied fuel amount (or price) when switch 40 actions.

Fig. 7 represents when electrical motor 15 is used as the fuel supply shutdown feature, an embodiment of the working process of processing unit 31.The working process of processing unit 31 starts from step S50, and step S51 is to the preceding fuel duty zero clearing among the counting region PCOUNT that is stored in random access memory 33.Step S52 provides a motor start-up signal to motor drive circuit 36, so that actuating motor 15.Step S53 judges whether switch 40 is connected, if the result who judges is a "Yes", then enters step S54.Fuel duty Q when step S54 connects switch 40 becomes integer number Q _I, Q _IGreater than Q.Step S55 will be worth the integer number storage area INT that I inserts the random access memory 33 that is used for storing integer number, and I is by integer number Q for value _IThe correcting value C that deducts constant D and be stored among the correcting value storage area ADDPLS obtains.Step S56 judges that whether supplied fuel amount (value Q) is more than or equal to integer number I.If the result who judges is a "No", process enters and is similar to step S34 shown in Figure 6 and other (not shown among Fig. 7).Otherwise if the result that step S56 judges is a "Yes", process enters and is similar to step S36 shown in Figure 6 and other (not shown among Fig. 7), so that stop electrical motor 15.The later working process of step S56 repeats no more here with to combine the explanation that Fig. 6 does basic identical.

In the embodiment shown in Figure 7, electrical motor 15 is as the fuel supply shutdown feature.Yet,, can make the fuel supply shutdown feature by enough valves 18 certainly as the embodiment shown in Fig. 4 A to 4C.But, in device, adopt valve 18 to act as a fuel and supply the situation of shutdown feature, just omit here and do not said, because by the explanation to Fig. 4 A to Fig. 4 C, the people that this is skilled in technique just is appreciated that these processes with integer number fuel supply mode.

In the embodiment shown in Figure 7, after finishing with integer number mode fuel supplying, fuel is filled with flexible pipe, and the fuel quantity that needs to be used for filling with flexible pipe in preceding fuel supply operation is as correcting value, and deducted the required integer fuel duty with integer number mode fuel supplying from effect next time.Therefore, no matter how twice fuel supply is in succession respectively carried out, can both obtain fuel quantity accurately.

In Shuo Ming each scheme, fuel system of the present invention is applicable to the fixed type fuel supply device up to now.Yet fuel supply device is not limited to fixed type, also may be suspension type, at this moment irritates the top that oil nozzle is positioned on flexible pipe, and flexible pipe hangs down from the eminence of fuelling station.In this suspension type fuel supply device, taking of flexible pipe finished by lifting mechanism, so the filling oil nozzle just can be placed on one and both be beneficial to the vehicle fuel supplying, be unlikely the position that influences vehicle turnover fuelling station again, in addition, adopt an elevator switch to come operate lifting mechanism, will irritate oil nozzle and between fuel supplying position and riding position, move.When fuel system of the present invention is used for the suspension type fuel supply device, can adopt the elevator switch to replace irritating the oil nozzle switch, be in open mode or closed condition so that detect filling oil nozzle valve.

In addition, in each scheme of explanation up to now, a detecting device is housed all, is in open mode or closed condition so that detect the valve of irritating oil nozzle 21.Yet, a kind of mechanism is housed irritating oil nozzle 21, irritate oil nozzle 21 when putting back on the carriage 22 with box lunch, irritate the oil nozzle valve can the situation of SELF CL under, just may omit detecting device.

The present invention is not limited to these embodiments, under the prerequisite that does not exceed the scope of the invention, can do variations and modifications.

Claims

1, a kind of fuel system that is used for fuel supply device consists of the following components: oil nozzle is irritated in the fuel supply that is installed in fuel supply flexible pipe one end; One end and the pipeline that the storage filling links to each other, the other end links to each other with the other end of fuel supply flexible pipe; Be installed in the pipeline, be used for irritating the pump that fuel is provided to the fuel supply flexible pipe from storage; Be used to drive pump motor; Be used to measure fuel flow that provides by pump and the flow signal generating means that produces the flow signal that is directly proportional with the flow that measures; Be used for the flow signal-count so that obtain the counting assembly of supplied fuel amount; Be used for selecting a kind of switching device of mode from the pluralities of fuel method of supplying; And during with a specific fuel supply mode fuel supplying, when the fuel duty that obtains in the counting assembly reaches needed fuel duty, be used to stop the fuel supply shutdown feature of fuel supply; It is characterized in that said fuel system comprises: fill with device, be used for when a kind of finish with said specific fuel supply mode fuel supplying after, with fuel filled with fuel supply hose, said counting assembly passes and fills with the fuel quantity of device filled with fuel supply hose; Memory unit, be used to store as correcting value and by the said fuel quantity of filling with device with fuel filled with fuel supply hose; Correct equipment, be used for by deduct the said correcting value of reading from said memory unit from needed fuel quantity with said ad hoc fashion supply, thereby obtain a calibrated fuel duty, and be used for when supply reaches calibrated fuel duty, by starting said fuel supply shutdown feature, stop fuel supply.

2, the said fuel system of claim 1, it is characterized in that: said switching device comprises that is inserted a switch in advance, be used for the predetermined quantity of fuel that will supply is gone into as the fuel supply quantity reset of said needs, said specific fuel supply mode is to insert the fuel supply mode in advance, during fuel supply, supply by this way by said and insert the predetermined quantity of fuel that switch is inserted in advance in advance.

3, the said fuel system of claim 1, it is characterized in that: said switching device comprises an assigned switch, be used for when said assigned switch action, and when the fuel duty that obtains in said counting assembly reaches integer number, handle said fuel supply shutdown feature, said specific fuel supply mode is an integer number fuel supply mode, and during fuel supplying, the integer number of said fuel provides as the fuel duty of said needs by this way.

4, the said fuel system of claim 1 is characterized in that: said fuel supply shutdown feature comprises and is installed in said ducted valve system, and when starting said fuel supply shutdown feature, said valve system cuts out.

5, the said fuel system of claim 1 is characterized in that: said fuel supply shutdown feature comprises said electrical motor, and when starting said fuel supply shutdown feature, said electrical motor shuts down.

6, the said fuel system of claim 1, it is characterized in that: detecting device also is housed in this system, be used for detecting after said fuel supply shutdown feature starts, whether said fuel supply is irritated the valve of oil nozzle and is closed, and be used for when said valve closing producing a detection signal, when finishing with the ad hoc fashion fuel supplying and only after said detecting device produces said detection signal, the said device of filling with provides fuel with the filled with fuel supply hose.