CN107614854A - The control device and control method of petrolift - Google Patents
The control device and control method of petrolift Download PDFInfo
- Publication number
- CN107614854A CN107614854A CN201680033355.8A CN201680033355A CN107614854A CN 107614854 A CN107614854 A CN 107614854A CN 201680033355 A CN201680033355 A CN 201680033355A CN 107614854 A CN107614854 A CN 107614854A
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- Prior art keywords
- fuel
- motor
- engine
- force feed
- petrolift
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Classifications
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- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
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- 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
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/3082—Control of electrical fuel pumps
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/043—Arrangements for driving reciprocating piston-type pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/04—Engine intake system parameters
- F02D2200/0404—Throttle position
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- 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
- F02D41/30—Controlling fuel injection
- F02D41/32—Controlling fuel injection of the low pressure type
- F02D41/34—Controlling fuel injection of the low pressure type with means for controlling injection timing or duration
-
- 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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/04—Feeding by means of driven pumps
- F02M37/08—Feeding by means of driven pumps electrically driven
- F02M2037/085—Electric circuits therefor
- F02M2037/087—Controlling fuel pressure valve
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Piston (56) is moved back and forth and by pressurized fuel force feed to injector (16) using the driving of DC motor (42), and synchronously sprayed with the burn cycle of engine (1) from injector (16).Compare engine swing circle (Teg) and motor swing circle (Tmt) (S3), in the case of both differences, the dutycycle (S4) of the driving current of DC motor (42) is calculated according to the operation range of engine (1) using usual way, in engine swing circle (Teg) and motor swing circle (Tmt) in the case of, the dutycycle of driving current to flowing into DC motor (42) is corrected (S6) in a manner of increasing setting or reducing setting, so as to be driven control (S5) to DC motor (42) according to the dutycycle after correction.Thus, when engine (1) operates, make motor swing circle (Tmt) different from engine swing circle (Teg) all the time.
Description
Technical field
Driving is used as the present invention relates to the control method of the control device of petrolift and petrolift, more particularly to using motor
Source makes reciprocating motion of the pistons so as to which the fuel pressure for being pressurized to authorized pressure to be delivered to the piston type fuel pump of the injector of engine
Control device and control method.
Background technology
In the past, for the purpose of the improvement of exhaust gas properties and the raising of burnup etc., the fuel supply to engine carries out electronics control
The fuel injection device of system is more popularized, and referent is not only carriage, has further related to various carts and generator etc..
This fuel injection device is configured to, and draws the fuel in fuel tank using petrolift and is forced into authorized pressure, after pressurization
Fuel be supplied to the injector of the air inlet pipe for being arranged at engine, synchronously injector is opened and closed with the burn cycle of engine
Control, so as to spray fuel in air inlet pipe.
As such petrolift, such as in the less engine of capacity used in cart or generator etc., by
In do not require nothing more than petrolift body realize miniaturization, it is also desirable to reduce pump driving needed for power consumption, therefore, sometimes using have
The piston type fuel pump of characteristic with these conditions.
This piston type fuel pump is configured to slidably be disposed in cylinder and utilizes back-moving spring towards one
Individual direction force, and drive piston towards opposite direction using the excitation of magnet coil.Cycle of the piston based on magnet coil
Property excitation move back and forth, concomitantly, be pressurized in cylinder fuel, so as to being intermittently discharged.Due to so
Operation principle, the pressure for being provided to the fuel of injector periodically changed based on the reciprocating motion of piston, even in
Be controlled in the duration of valve opening of same injector also can make fuel injection amount produce deviation because fuel pressure changes, so as to make
Burning into engine becomes unstable, and the problem of cause exhaust gas properties and driveability deterioration.
Thus, such as in the piston type fuel pump described in patent document 1, the driving by making petrolift is tried hard to drawing
The rotation held up synchronously solves problem.That is, it is synchronous with the rotation of engine in the piston type fuel pump described in patent document 1
Ground drives injector from fuel injection start time t2 in fuel injection time Tout, on the other hand, will be sprayed than the fuel
Be determined as at the time of penetrating stipulated time morning start time t2 Tf petrolift driving start time t1, since petrolift drive when
Carve t1 and drive petrolift always in whole petrolift driving time Tpump (excitation is carried out to magnet coil).As a result, pass through
Fuel injection is consistently performed in the timing that the driving because of petrolift rises fuel pressure, can be suppressed because fuel pressure becomes
It is dynamic and caused by fuel injection amount deviation.
Prior art literature
Patent document
Patent document 1：Japanese Patent Laid-Open 2004-52596 publications
The content of the invention
The technical problems to be solved by the invention
In piston type fuel pump described in patent document 1, due to can freely become in each burn cycle of engine
More as driving source magnet coil excitation timing, accordingly, it is capable to follow the trail of the operation range based on engine and the moment changes
Fuel injection timing, as described above control petrolift driving timing.However, in the work using motor as driving source
In plug petrolift, need to change the rotating speed of motor to change the driving timing, so as to be difficult tracking combustion in practice
Injection timing is expected to make the rotating speed of motor change rapidly.Therefore, nothing in the piston type fuel pump of driving source is used as using motor
Method is applicable the technology of patent document 1, wishes other all the time and solves countermeasure.
For the present invention precisely in order to solving the above problems and completing, its object is to provide a kind of control device of petrolift
And control method, by the piston type fuel pump using motor as driving source as object, suppress because its fuel pressure changes and
The deviation of caused fuel injection amount, so as to prevent the deterioration of exhaust gas properties and cornering ability in advance.
Solves the technical scheme of technical problem
To achieve these goals, the control device of petrolift of the invention is characterised by, including：Fuel in the form of piston
Pump, the petrolift in the form of piston make piston move back and forth using the driving of motor, and to being forced into the combustion of authorized pressure
Material carries out force feed；The burn cycle of injector, the injector and engine synchronously sprays the fuel come from petrolift force feed；Electricity
Motivation control unit, the motor control unit provide driving current to motor and control the motor；Identifying unit, this is sentenced
Order member perform judge injector fuel injection period and piston the fuel force feed cycle in any one party whether equivalent to
The judgement output of the multiple of the opposing party；And electromotor velocity alteration command unit, the electromotor velocity alteration command unit exist
It is determined as any one party in the fuel injection period of injector and the fuel force feed cycle of piston equivalent to another by identifying unit
During the multiple of one side, make the rotating speed of motor control unit change motor.
According to the control device of petrolift of the invention as constructed as above, in the fuel injection period and piston of injector
Any one party in the fuel force feed cycle equivalent to the opposing party multiple when, change the rotating speed of motor to make the fuel force feed cycle
Away from fuel injection period.Therefore, when engine operates, make the fuel force feed cycle different from fuel injection period all the time, so as to
Make the relationship change of fuel injection timing and fuel force feed timing in each burn cycle.Thus, even in some burn cycle
Fuel injection timing accidentally overlaps with the timing of fuel force feed, also will not necessarily be weighed in the timing of both next burn cycles
It is folded, so as to cause the operating condition of the combustion instability of engine because of the deviation of fuel injection amount in the moment of 1 burn cycle
Terminate.
As other manner, it is preferably configured as also including：Engine swing circle computing unit, the engine swing circle calculate
Unit calculates the swing circle of engine；And motor swing circle computing unit, the motor swing circle computing unit
The swing circle of motor is calculated, identifying unit is to the swing circle of the engine calculated by engine swing circle computing unit
Compared with the swing circle of the motor calculated by motor swing circle computing unit, so as to perform determination processing.
In the case where being constructed as described above, according to judgement knot of the swing circle of engine compared with the swing circle of motor
Fruit, change the rotating speed of motor.
As other manner, it is preferably configured as also including：Fuel injection timing determining unit, the fuel injection timing determine
Unit determines the fuel injection timing of injector；And fuel force feed timing determination unit, the fuel force feed timing determination unit
The timing of the fuel force feed of piston is determined according to the change to the driving current value of motor is provided by motor control unit, is sentenced
Order member to determined by fuel injection timing determining unit the fuel injection timing of injector with by fuel force feed timing it is true
The fuel force feed timing of piston determined by order member is compared, so as to perform determination processing.
In the case where being constructed as described above, the timing of the fuel force feed of piston is determined according to the change of the driving current value of motor,
Turning for motor is changed according to fuel force feed result of determination of the timing compared with the fuel injection timing of injector
Speed.
As other manner, petrolift is preferably configured as making diaphragm move back and forth using the driving of motor, and
Reciprocating motion with diaphragm synchronously makes piston move back and forth, and the fuel sent out from diaphragm is pressurizeed simultaneously using piston
Force feed is to injector.
In the case where being constructed as described above, using the petrolift of dual-purpose diaphragm and piston as object, can obtain as described above each
Kind action effect.
In addition, the control method of the petrolift of the present invention is characterised by having：Cycle judges process, and the cycle judges
In process, the driving using motor is made piston move back and forth and force feed fuel petrolift in the form of piston fuel pressure
Send the cycle and synchronously sprayed with the burn cycle of engine the fuel injection week of the injector of the fuel come from petrolift force feed
Phase is compared, judge any one party in fuel force feed cycle and the fuel injection period whether equivalent to the opposing party times
Number；And rotating speed change process, the rotating speed change process in, using the cycle judge process be determined as the fuel force feed cycle and
Any one party in the fuel injection period equivalent to the opposing party multiple when, change the rotating speed of motor.
According to the control method of petrolift of the invention as constructed as above, process is judged using the cycle, to combustion in the form of piston
The fuel force feed cycle of pump is expected compared with the fuel injection period of injector, judges fuel force feed cycle and fuel spray
Any one in the cycle is penetrated whether equivalent to another multiple.Moreover, if it is determined that it is the fuel force feed cycle and the fuel
Any one in injection cycle is equivalent to another multiple, then using the rotating speed of rotating speed change process change motor, from
And make the fuel force feed cycle away from fuel injection period.
Invention effect
According to the control device and control method of the petrolift of the present invention, the piston type using motor as driving source is fired
Expect pump be used as object, suppress because its fuel pressure change and caused by fuel injection amount deviation, so as to prevent in advance waste gas spy
The deterioration of property and cornering ability.
Brief description of the drawings
Fig. 1 is the system construction drawing for the control device for representing the petrolift of the present invention.
Fig. 2 is the profile for the details for representing petrolift.
Fig. 3 is the flow chart for representing the petrolift control flow performed by the ECU of first embodiment.
Fig. 4 is the flow chart for representing the petrolift control flow performed by the ECU of second embodiment.
Embodiment
Below, to the control device and controlling party by the present invention particularly for the petrolift for the engine for being equipped on cart
The embodiment of method illustrates.
Fig. 1 is the system construction drawing for the control device for representing the petrolift of the present invention.
In Fig. 1, engine 1 is configured to capacity 50cc four-cycle, single-cylinder gasoline engine, and two are equipped on power source as traveling
Take turns car.But on the specification of engine 1, it is not limited to that, any change can be carried out.
In the cylinder 3 of cylinder block 2 for being formed at engine 1, piston 4 is slidably arranged, piston 4 is via connecting rod
5 are connected with crank axle 6, and the reciprocating motion of crank axle 6 and piston 4 is rotated in linkage.The rear end of crank axle 6 is (not shown
Variable-speed motor side) flywheel 7 is installed, the assigned position on the periphery of flywheel 7 forms the magnetic resistance for detecting crankangle
Dispensing head 7a.
The cylinder head 9 being fixed in cylinder block 2 formed with air inlet 9a and exhaust outlet 9b, and so that front end towards cylinder
Interior posture arranges spark plug 10.It is connected in air inlet 9a intake channel 11, purification of air is provided with from upstream side
The choke valve 13 and the injector 16 to air inlet 9a spray fuels that device 12, the throttle operation based on driver are opened and closed.
In addition, be connected in exhaust outlet 9b exhaust channel 17, three-way catalyst 18 for purifying waste gas and not shown is provided with
Muffler.
Intake valve 20 is arranged in air inlet 9a, air bleeding valve 21 is arranged in exhaust outlet 9b.Above-mentioned intake valve 20, the quilt of air bleeding valve 21
Valve spring 22 pushes valve-closing side to, and utilizes the admission cam shaft 23 being synchronously driven in rotation with crank axle 6 on cylinder head 9
And exhaust cam shaft 24 carries out valve opening.Thus, the reciprocating motion with piston 4 it is synchronous regulation timing, intake valve 20 and exhaust
Valve 21 is opened and closed, and by air inlet, compression, expansion, is vented the burn cycle of the engine 1 that this four strokes form every 720 DEG C of A's
Crankangle is repeated.
Using petrolift 26 fuel (gasoline) being stored in fuel tank 25 is provided to above-mentioned injector 16.Present embodiment
Petrolift 26 be piston type fuel pump one kind, its structure and working condition will be described later, but be configured to simultaneous
The authorized pressure and force feed being pressurized to fuel with diaphragm and piston needed for the action of injector 16 fuel (are hereinafter also referred to as
Diaphragm-type servo unit dual-purpose formula).Petrolift 26 is formed with injector 16 and is integrated, and is distinguished via supply hose 27 and return hose 28
It is connected to fuel tank 25.
If petrolift 26 works, the fuel in fuel tank 25 is directed in petrolift 26 via supply hose 27, and
Authorized pressure is pressurized to, the fuel after pressurization is provided to injector 16, and residual fuel is returned via return hose 28
Receive to fuel tank 25.Thus, the fuel of authorized pressure is provided injector 16 all the time, corresponding to the valve opening of injector 16, with rule
Fixed time for spraying and defined emitted dose are to air inlet 9a spray fuels.
When engine 1 operates, utilize in the intake stroke with the decline of piston 4 and caused negative pressure passes through extraneous air
It is inhaled into by air purifier 12 in intake channel 11, carrying out flow to suction air in the aperture based on choke valve 13 adjusts it
Afterwards, it is mixed with the spray fuel from injector 16, and flowed into 20 valve opening of intake valve in the cylinder of engine 1.Through
Later after the compression of continuous compression stroke, mixed gas is lighted near compression top dead center by spark plug 10, and it is expanding
Burnt in stroke, and the revolving force of crank axle 6 is given via piston 4.In follow-up exhaust stroke, the waste gas after burning is being vented
Discharged during 21 valve opening of valve out of cylinder, flow through exhaust channel 17 and be discharged to after three-way catalyst 18 and muffler outer
Portion.
The burn cycle of above-mentioned engine 1 performs according to ECU31 (engine control unit) control.Therefore, ECU31
Input side is connected with by various sensor classes as described below：That is, it is oppositely disposed and exports with above-mentioned flywheel 7 and is distributed with magnetic resistance
The electromagnetic sensor 32 (electromagnetic pickup) of signal synchronous head 7a, detect choke valve 13 aperture section
Flow sensor 33, it is configured at exhaust channel 17 and based on stoichiometry (chemically correct fuel；theoretical air fuel
Ratio the O for changing to make output change stepwise of the exhaust air-fuel ratio centered on)2Sensor 34 and detect engine
1 coolant water temperature Tw cooling-water temperature sensor 35 etc..In addition, ECU31 outlet side is connected with for driving above-mentioned injector 16, combustion
Expect the various device classes of the igniter 36 of pump 26, spark plug 10 etc..
ECU31 is based on these sensor informations, performs following various controls to operate engine 1：That is, for driving injector
16 fuel injection control, for driving the time of ignition of spark plug 10 to control, and for driving the pump of petrolift 26 to control
Deng.
Such as the engine speed Ne that is gone out as fuel injection control, ECU31 according to the signal of change using electromagnetic sensor 32 and
Throttle opening θ th detected by throttling sensor 33 etc., target fuel injection amount is determined, it is same with the fuel recycle with engine 1
The regulation timing driving injector 16 of step, so as to perform fuel injection.
In addition, being controlled as time of ignition, ECU31 determines target ignition according to engine speed Ne and throttle opening θ th etc.
At the moment, on the other hand, waveform shaping is carried out to the signal of electromagnetic sensor 32, so as to generate with magnetic resistance dispensing head 7a (in other words
For crankangle) the wavy crank angle signal of synchronous rectangle.Then, when ECU31 is based on crank angle signal determination with target ignition
Carve corresponding timing, drive ignition device 36 makes spark plug 10 light a fire.
In addition, ECU31 is in order to drive the motor of the driving source as petrolift 26 (DC motor 42 described later) and interior
It is equipped with drive circuit 31a.Moreover, being controlled as pump, ECU31 provides drive when engine 1 operates from drive circuit 31a to motor
Streaming current drives petrolift 26, and delivers to (the Motor Control list of injector 16 by the fuel pressure after authorized pressure is forced into
Member).
However, as described above, the petrolift 26 of present embodiment is diaphragm-type servo unit dual-purpose formula petrolift, it is therefore desirable to press down
Make because fuel pressure change and caused by fuel injection amount deviation countermeasure.But due to being used as its drive using motor
Dynamic source, therefore, as described in Patent Document 1 using magnet coil as the piston type fuel pump of driving source as, it is more difficult to make combustion
Expect that the driving of pump is synchronous with the rotation of engine.
Thus, in the present embodiment, in turn by making the swing circle of motor different from the swing circle of engine 1, from
And try hard to solve the problems, such as.Below, although the details of pump control can be illustrated, the structure of petrolift 26 is illustrated first.
Fig. 2 is the profile for the details for representing petrolift 26.
The shell of petrolift 26 is made up of motor casing 41a, pump case 41b and regulator shell 41c, motor casing 41a
Inside it is accommodated with DC motor 42 (shown in broken lines) and is used as driving source.The output shaft 42a of DC motor 42 is fixed with cam 43,
If rotating cam 43 using the driving of DC motor 42, cam, which bears left and right directions of the component 44 in figure, (below should
Direction is referred to as axis L directions) on move back and forth.
Cam bears to be fixed with the central part of diaphragm 46 on component 44, using the diaphragm 46 in motor casing 41a and pump
Diaphragm chamber 47 is separated out between shell 41b.Bear the reciprocating motion of component 44 based on cam, diaphragm 46 in figure right side (below
Referred to as suction side) it is alternately carried out moving back and forth between left side (hereinafter referred to as discharge side).Moved in diaphragm 46 to suction side
When, the fuel from fuel tank 25 is flowed into diaphragm chamber 47 via supply hose 27 and feed path 50.In addition, diaphragm 46 to
When discharge side moves, the fuel in diaphragm chamber 47 is recovered to the side of fuel tank 25 via current return circuit 52 and return hose 28,
In each reciprocating motion of diaphragm 46, such fuel conveying is repeated.
It is being fitted and fixed with the sleeve pipe 55 in pump case 41b, piston is slidably equipped along axis L directions
56, piston 56 bears component 44 with cam and is connected, and the reciprocating motion of piston 56 and diaphragm 46 synchronously in suction side and is discharged
Moved back and forth between side.When piston 56 moves to suction side, a part for the fuel in diaphragm chamber 47 is via suction inlet
56a is flowed into piston 56, is also further flowed into via check-valves 58 in compression chamber 57.Moved in piston 56 afterwards to discharge side
When, the fuel in compression chamber 57 is pressurizeed, in each reciprocating motion of piston 56, such fuel is repeated and adds
Pressure.
The fuel being pressurized using the reciprocating motion of piston 56 in compression chamber 57 is provided to setting via check-valves 60
In regulator shell 41c pressure adjustmenting mechanism 59, it is adjusted to set pressure using the pressure adjustmenting mechanism 59.Adjusted by pressure
Whole and caused residual fuel is discharged to pressure release path (relief valve) 69, with the residual fuel one from diaphragm chamber 47
Rise and be recovered to the side of fuel tank 25.Moreover, the fuel after pressure adjustment is carried out from pressure control chamber using pressure adjustmenting mechanism 59
66 (are shown) via injector path 68 by force feed to above-mentioned injector 16 in Fig. 1, with the valve opening of injector 16 towards drawing
1 air inlet 9a is held up to be sprayed.
As described above, the petrolift 26 of present embodiment makes piston 56 move back and forth to add to fuel
Pressure, therefore can not avoid the variation of fuel pressure, but on the other hand, due to using DC motor 42 as driving source, therefore nothing
Method is applicable the technology of patent document 1.
On the basis of the characteristic of above-described problem and petrolift 26 is considered, the present inventor is conceived to following
Aspect.
First, pressurizeed using piston 56 and carry out the fuel after pressure adjustment via injector using pressure adjustmenting mechanism 59
Path 68 is provided to injector 16, but except (being hereinafter referred to as fuel pressure using piston 56 come the force feed timing of force feed fuel
Send timing) beyond, remain stable from fuel pressure of the injector path 68 in the path untill injector 16 and set
Constant-pressure (such as 300kPa or so).Therefore, if making the fuel force feed timing not fuel injection timing weight with each burn cycle
It is folded, then due to performing fuel injection under the fuel pressure of stable setting pressure all the time, therefore can exclude because of fuel pressure
Change and the influence to caused by fuel injection amount.
On the other hand, such as in the case where driving the DC motor 42 of petrolift 26 with defined rotating speed Nm, fuel spray
Penetrate operation range of the timing based on engine 1 and change, cause to produce burn cycle accidentally overlapping with the timing of fuel force feed.This
When, if fuel injection cycle (in other words, be the swing circle Teg of engine 1 described later, also with fuel injection timing TMinj phases
Close) with cycle of fuel force feed (in other words, be the swing circle Tmo of DC motor 42 described later, also with the timing of fuel force feed
TMpump is related) unanimously, as long as then engine 1 is rested in the operation range, it will continuously produce the timing of fuel force feed and combustion
Expect the overlapping fuel recycle of injection timing.Therefore, during above-mentioned phenomenon occurs, caused due to the deviation of fuel injection amount
The burning of engine 1 becomes unstable, and the lasting operating condition for keeping that target A/F can not be realized, turning into causes exhaust gas properties and drive
The main reason for sailing penalty.
Fuel injection timing is caused to be not limited only to both cycles one with the reason for fuel force feed timing overlapping such problem
The situation of cause, if the cycle of any one party equivalent to the multiple in the cycle of the opposing party, the problem of same can occur.Such as firing
In the case that the cycle of material injection is 2 times of the cycle of fuel force feed, situation consistent with the above is identical, in each burn cycle
In the fuel force feed timing situation overlapping with fuel injection timing continuously occurs.Conversely, it is fuel in the cycle of fuel force feed
In the case of 2 times of the cycle of injection, it is overlapping with fuel injection timing that the timing of fuel force feed occurs every burn cycle once
Situation, as long as but the operation range of such case engine 1 do not change, will not release, therefore turn into problem really.
On the other hand, fuel injection timing overlaps with the timing of fuel force feed in some burn cycle, is firing
Expect injection cycle and fuel force feed cycle in any one party not equivalent to the opposing party multiple situation (both cycles
It is inconsistent, and be not also the situation of more than 2 multiple proportion) under, in next burn cycle, both timings may not necessarily occur
Overlapping situation.That is, because the deviation of fuel injection amount causes the operating condition of the combustion instability of engine 1 to be only limitted to 1 combustion
The moment of circulation is burnt, therefore, substantially can not possibly be as the main reason for making exhaust gas properties and driveability deterioration.Therefore, exist
The fuel injection timing situation overlapping with force feed timing occurs in 1 above-mentioned burn cycle can regard as in admissible scope
It is interior.
Based on above-mentioned opinion, the present inventor draws the following conclusions：If it is controlled such that the rotation of DC motor 42
The turn-week phase is different from the swing circle of engine 1 all the time, then fuel injection timing and the timing of fuel force feed in each burn cycle
Relation can change, although it some times happens that both timing situation accidentally overlapping in 1 burn cycle, energy
Enough prevent from turning into the situation about being overlapped in continuous burn cycle of problem.Below, as first embodiment and
Two embodiments, illustrate two methods successively.
First embodiment
In present embodiment, the swing circle of engine 1 is monitored and compared with the swing circle of DC motor 42, both
In the case that cycle is close, away from the swing circle of the direction controlling DC motor 42 of the swing circle of engine 1.Therefore,
ECU31 performs the pump control flow shown in Fig. 3 with the defined control interval in the operating of engine 1.
First, in step sl, the signal from electromagnetic sensor 32 is obtained, according to the signal, is calculated in step s 2
Go out engine swing circle Teg (engine swing circle computing unit).Described engine swing circle Teg represents fuel injection herein
Cycle, in the present embodiment, due to being four-cycle, single-cylinder gasoline engine 1, therefore whenever engine 1 rotate 2 times (720 DEG C of A)
The cycle of Shi Fanfu fuel injection is taken as engine swing circle Teg to handle.
In follow-up step S3, engine swing circle Teg and motor swing circle are judged based on following formula (1)
Tmt whether different (identifying unit, cycle judge process).Motor swing circle Tmt represents the piston 56 using petrolift 26
The cycle of fuel force feed is carried out, as described above, the cycle of the fuel force feed when rotating 1 time DC motor 42 repeatedly is taken as
Motor swing circle Tmt is handled.ECU31 in order to play a part of motor control unit and via 31a pairs of drive circuit
DC motor 42 provide driving current, and therefore, dutycycle based on the driving current etc. calculates the revolution of DC motor 42
Phase (motor swing circle computing unit).
| engine swing circle Teg- motor swing circles Tmt |≤decision content Δ T ... (1)
Due to the detection error or ECU31 of the control error of engine 1 and DC motor 42, electromagnetic sensor 32 etc.
The a variety of causes such as caused engine speed Ne increase and decrease between controlling cycle, even if engine swing circle Teg revolves with motor
The turn-week phase, Tmt was not quite identical, and the overlapping situation of both timings can also occur.Thus, not only in both swing circles
In the case that Teg, Tmt are completely the same, and swing circle Teg, Tmt be close to a certain degree of situation (below, be expressed as
Both " close situations ") under, in order to be controlled towards the direction for making both swing circle Teg, Tmt remote, set in advance
Determine decision content Δ T and be used as threshold value.
In addition, in above-mentioned formula (1), it was only assumed that engine swing circle Teg is consistent with motor swing circle Tmt
Situation, do not assume the two cycle into the situation of multiple proportion.Reason is the engine 1 and petrolift in present embodiment
In 26 specification, which operation range both cycles can not be all made to turn into multiple proportion in.Although natural,
But in both cycles can turn into the specification of multiple proportion, as long as considering the formula of the content of this point instead i.e.
Can.
Step S4 is transferred to when step S3 judgement is no (negative), is provided using usual way to calculate to DC electricity
The dutycycle of the driving current of motivation 42.Such as dutycycle is calculated, it is used as to reduce power consumption and suppresses DC motor 42
Rotating speed Nm and be sufficient for the fuel quantity of target injection amount now from injector 16 in order to be discharged from petrolift 26 and fit
The value of conjunction.
Specifically, operation range, such as engine speed Ne and throttle opening θ th (engine load) meters based on engine 1
The a reference value of dutycycle is calculated, a reference value is corrected with the correction coefficient corresponding with coolant water temperature Tw, cell voltage Vbtt,
Calculate final dutycycle.But the calculating of dutycycle processing is not limited to that, such as can be with the operating area of engine 1
Fixed value set in advance is independently applicable as dutycycle by domain.Thus dutycycle is calculated, in follow-up step S5, in base
After Duty ratio control flows into the driving current of DC motor 42, terminate flow.
On the other hand, approach in engine swing circle Teg and motor swing circle Tmt and judge in above-mentioned steps S3
During to be (affirmative), step S6 is transferred to, it is set in advance to increase to flowing into the dutycycle of driving current of DC motor 42
The mode of setting be corrected or be corrected in a manner of reducing setting set in advance (electromotor velocity change refers to
Make unit, rotating speed change process), it is then transferred to above-mentioned steps S5.Value as calibration object is to realize to be applied to above-mentioned formula
(1) dutycycle during motor swing circle Tmt of calculating processing, with the orientation accordingly to motor speed Nm
Increased and decreased, motor swing circle Tmo is increased or decreased correspondingly, so as to away from engine swing circle Teg.
Understood based on described above：The purpose of step S6 processing is, is provided by adjusting to the confession of DC motor 42
Electricity increases and decreases motor speed Nm, further realizes motor swing circle Tmo increase and decrease.Therefore, this method and not only
It is limited to as described above to be corrected dutycycle, additionally it is possible to numerous variations are carried out, such as can also be by correcting driving simultaneously
The PWM cycle and dutycycle of electric current, provided to adjust to the power supply of DC motor 42.
In addition, for the orientation of the dutycycle in above-mentioned steps S6, it is relative in the fuel quantity discharged from petrolift 26
It in the case that target injection amount also has surplus, can be corrected to increase side, can be also corrected to side is reduced.However,
In step s3, with for meeting that quantity combusted accordingly sets dutycycle needed for the minimum of target injection amount in the case of,
If to side correction dutycycle is reduced, motor speed Nm is reduced and may be become that target injection amount can not be realized.Thus,
As long as in this case, to increase side correction dutycycle, thus, it is possible to maintain correct fuel injection amount.
Using above-mentioned ECU31 processing, in the engine swing circle Teg situations different from motor swing circle Tmt
Under, control the driving for flowing into DC motor 42 electric with generally equally utilizing the dutycycle corresponding with the operation range of engine 1
Stream, on the other hand, if engine swing circle Teg approaches with motor swing circle Tmt, by correcting dutycycle (or PWM
Cycle and dutycycle) motor speed Nm is increased and decreased, so that motor swing circle Tmo is away from engine swing circle
Teg。
As a result, according to the control device of the petrolift 26 of present embodiment, when engine 1 operates, make all the time electronic
Machine swing circle Tmt is different from engine swing circle Teg, so as to make fuel injection timing and fuel in each burn cycle
The relationship change of force feed timing.Therefore, fuel injection timing and fuel force feed timing accidentally hair in some burn cycle
Life is overlapping, and in next burn cycle, both timings also will not necessarily overlap.Therefore, because fuel injection amount is inclined
Difference and the operating condition of the combustion instability of engine 1 is just finished in the moment of 1 burn cycle, therefore, in use with DC
On the basis of motor 42 is as the diaphragm-type servo unit dual-purpose formula petrolift 26 of driving source, it can prevent in advance because of fuel injection amount
Deviation caused by exhaust gas properties and cornering ability deterioration.
Second embodiment
Then, the second embodiment embodied to the present invention is illustrated.The hardware configuration of present embodiment and first is implemented
Mode is identical, and distinctive points are ECU31 process content.Specifically, in the first embodiment, according to engine swing circle
Teg and motor swing circle Tmt comparative result carrys out the setting processing (Fig. 3 step S4) of switching duty cycle, but at this
In embodiment, the timing of the fuel force feed of piston 56 is determined according to the change to the driving current value of DC motor 42 is provided,
According to fuel force feed timing with the comparative result of the fuel injection timing of engine 1 come the setting processing of switching duty cycle.Thus,
In the following description, emphasis describes the distinctive points related to ECU31 processing.
First, in order to detect to provide to the driving current value of DC motor 42, in present embodiment from drive circuit 31a
ECU31 in have with the current detection circuit 31b shown in dotted line in Fig. 1, ECU31 is configured to according to current detecting electricity
Road 31b testing result come determine the fuel force feed of piston 56 timing (fuel force feed timing determination unit).
ECU31 reads the driving electricity of DC motor 42 in step s 11 first in pump control flow as shown in Figure 4
Flow valuve, according to the change of the driving current value, in step s 12, it is determined that in current burn cycle piston 56 fuel force feed
Regularly.Because the driving current value of DC motor 42 has in fuel by the timing of the force feed of piston 56 rapidly increased characteristic, because
This sees fuel force feed timing TMpump as at the time of will be towards the increase direction change.
In follow-up step S13, fuel injection timing TMinj and the combustion of injector 16 are judged based on following formula (2)
Expect whether force feed timing TMpump is different (identifying unit, cycle judge process).In fuel injection control, due to ECU31 certainly
Body is driven control to injector 16, therefore sees the driving timing as fuel injection timing TMinj (fuel injection timings
Determining unit).
| fuel injection timing TMinj- fuel force feed timings TMpump |≤decision content Δ TM ... (2)
The decision content Δ T of decision content Δ TM and formula (1) has identical meaning, not only fuel injection timing TMinj with
In the case that fuel force feed timing TMpump is completely the same, and in the case that both are close to a certain degree (below, statement
For both " close situations ") under, preset decision content Δ TM.
When step S13 judgement is no (negative), the operating in step S14 using usual way according to engine 1
Region is provided to the dutycycle of the driving current of DC motor 42 to calculate.In addition, when above-mentioned steps S13 judgement is is,
In step s 16, in a manner of increased or in a manner of reduction to flow into DC motor 42 driving current dutycycle (or
Person's PWM cycle and dutycycle) (electromotor velocity alteration command unit, rotating speed change process) is corrected, then in step S15
Middle control flows into the driving current of DC motor 42.
Using above-mentioned ECU31 processing, in the fuel injection timing TMinj feelings different from fuel force feed timing TMpump
Under condition, the driving of inflow DC motor 42 is controlled with generally equally utilizing the dutycycle corresponding with the operation range of engine 1
Electric current, on the other hand, if fuel injection timing TMinj approaches with fuel force feed timing TMpump, by correcting dutycycle pair
Motor speed Nm is increased and decreased.Motor speed Nm increase and decrease is to instigate motor swing circle Tmo away from engine revolution
Phase Teg, while fuel force feed timing TMpump is also instigated away from fuel injection timing TMinj.
As a result, can obtain with first embodiment identical action effect, although being not repeated,
When engine 1 operates, make motor swing circle Tmt different from engine swing circle Teg all the time, so as in each burning
Circulation makes fuel injection timing TMinj and fuel force feed timing TMpump relationship change.Therefore, in use with DC motor 42
On the basis of the diaphragm-type servo unit dual-purpose formula petrolift 26 of driving source, can prevent in advance because of the deviation of fuel injection amount and
The deterioration of caused exhaust gas properties and cornering ability.
In addition, the mode of the present invention is not limited in above-mentioned embodiment.Such as in the above-described embodiment, present invention tool
Body is the control device of the petrolift 26 of the engine 1 for being equipped on cart, but the carrying object of engine 1 is not limited in
This.Such as can be by control device of the present invention particularly for the petrolift for the engine for being equipped on tricycle or generator and control
Method processed.
In addition, in the above-described embodiment, to the applicable diaphragm-type servo unit dual-purpose formula petrolift 26 of the present invention, but petrolift
26 form is not limited to that.Such as the present invention can be also applicable without diaphragm 46 and fuel entered merely with piston 56
Row pressurization and the piston type fuel pump provided.
Label declaration
1 engine
16 injectors
26 petrolifts
31 ECU (identifying unit, electromotor velocity alteration command unit, engine swing circle computing unit, motor revolution
Phase computing unit, fuel injection timing determining unit)
31a drive circuits (motor control unit)
31b current detection circuits (fuel force feed timing determination unit)
42 DC motor
46 diaphragms
56 pistons
Claims (5)
- A kind of 1. control device of petrolift, it is characterised in that including：Petrolift in the form of piston, the petrolift in the form of piston make piston move back and forth using the driving of motor, and pair plus The fuel for being depressed into authorized pressure carries out force feed；The burn cycle of injector, the injector and engine synchronously sprays the fuel come from the petrolift force feed；Motor control unit, the motor control unit provide driving current to the motor and control the motor；Identifying unit, the identifying unit perform the fuel force feed week for judging the fuel injection period of the injector with the piston Interim any one party whether equivalent to the opposing party multiple determination processing；AndElectromotor velocity alteration command unit, the electromotor velocity alteration command unit be determined as by the identifying unit it is described Any one party in the fuel force feed cycle of the fuel injection period of injector and the piston equivalent to the opposing party multiple when, The motor control unit is set to change the rotating speed of the motor.
- 2. the control device of petrolift as claimed in claim 1, it is characterised in that also have：Engine swing circle computing unit, the engine swing circle computing unit calculate the swing circle of the engine；AndMotor swing circle computing unit, the motor swing circle computing unit calculate the revolution of the motor Phase,The identifying unit to the swing circle of the engine that is calculated by the engine swing circle computing unit with by institute The swing circle for stating the motor that motor swing circle computing unit calculates is compared, so as to perform at judgement Reason.
- 3. the control device of petrolift as claimed in claim 1, it is characterised in that also have：Fuel injection timing determining unit, the fuel injection timing determining unit determine the fuel injection timing of the injector； AndFuel force feed timing determination unit, the fuel force feed timing determination unit according to by the motor control unit provide to The driving current value of the motor changes to determine the timing of the fuel force feed of the piston,Fuel injection timing of the identifying unit to the injector determined by the fuel injection timing determining unit Compared with the fuel force feed timing of the piston determined by the fuel force feed timing determination unit, sentence so as to perform Fixed processing.
- 4. the control device of petrolift as claimed any one in claims 1 to 3, it is characterised in thatThe petrolift is configured to make diaphragm move back and forth using the driving of the motor, and reciprocal with the diaphragm Motion synchronously makes piston move back and forth, and to the fuel sent out from the diaphragm pressurize simultaneously force feed using the piston To the injector.
- A kind of 5. control method of petrolift, it is characterised in that including：Cycle judges process, and the cycle is judged in process, piston is moved back and forth and force feed to the driving using motor Fuel force feed cycle of the petrolift in the form of piston of fuel and synchronously being sprayed from the fuel with the burn cycle of engine is pumped The fuel injection period of the injector of the fuel sent is compared, and judges fuel force feed cycle and the fuel injection period In any one party whether equivalent to the opposing party multiple；AndRotating speed changes process, and the rotating speed is changed in process, is judging that process is being determined as the fuel force feed cycle using the cycle With any one party in the fuel injection period equivalent to the opposing party multiple when, change the rotating speed of the motor.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-115902 | 2015-06-08 | ||
| JP2015115902A JP6545006B2 (en) | 2015-06-08 | 2015-06-08 | Fuel pump control device and control method |
| PCT/JP2016/065195 WO2016199570A1 (en) | 2015-06-08 | 2016-05-23 | Control device and control method for fuel pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107614854A true CN107614854A (en) | 2018-01-19 |
| CN107614854B CN107614854B (en) | 2020-11-17 |
Family
ID=57503853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680033355.8A Expired - Fee Related CN107614854B (en) | 2015-06-08 | 2016-05-23 | Fuel pump control device and control method |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP3306061A4 (en) |
| JP (1) | JP6545006B2 (en) |
| CN (1) | CN107614854B (en) |
| WO (1) | WO2016199570A1 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780065A (en) * | 1980-11-06 | 1982-05-19 | Sanyo Electric Co Ltd | Ink jet printer |
| US5511956A (en) * | 1993-06-18 | 1996-04-30 | Yamaha Hatsudoki Kabushiki Kaisha | High pressure fuel pump for internal combustion engine |
| JP2001164977A (en) * | 1999-12-08 | 2001-06-19 | Honda Motor Co Ltd | Engine control device |
| DE102006037170A1 (en) * | 2006-08-09 | 2008-02-14 | Robert Bosch Gmbh | Automotive fuel injection system for vehicles with electrically-operated servo-valves has two overlapping injection phases per injection cycle |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2764515B2 (en) * | 1993-02-25 | 1998-06-11 | 株式会社ユニシアジェックス | Fuel supply device for internal combustion engine |
| JPH10274131A (en) * | 1997-03-28 | 1998-10-13 | Mitsubishi Motors Corp | Cylinder injection internal combustion engine with single cylinder pump |
| JP2001107818A (en) * | 1999-08-05 | 2001-04-17 | Denso Corp | Fuel system |
| JP2003336534A (en) * | 2002-05-17 | 2003-11-28 | Mitsubishi Motors Corp | Fuel injection control device for internal combustion engine |
| JP2004052596A (en) * | 2002-07-17 | 2004-02-19 | Keihin Corp | Control device for plunger type fuel feed pump |
| CN1788153B (en) * | 2004-03-01 | 2010-12-22 | 雅马哈发动机株式会社 | Fuel pump control device and fuel pump control method |
| JP2007162644A (en) * | 2005-12-16 | 2007-06-28 | Denso Corp | Fuel injection control device |
| JP2008121426A (en) * | 2006-11-08 | 2008-05-29 | Toyota Motor Corp | Fuel injection control device of internal combustion engine |
| BR112013029205A2 (en) * | 2011-05-13 | 2017-02-14 | Mikuni Kogyo Kk | high pressure fuel pump device |
| JP6072411B2 (en) * | 2011-12-28 | 2017-02-01 | 株式会社ミクニ | Fuel pressure control device and fuel supply device using the same |
| JP5985190B2 (en) * | 2012-01-19 | 2016-09-06 | 株式会社ミクニ | Fuel injection device for internal combustion engine |
-
2015
- 2015-06-08 JP JP2015115902A patent/JP6545006B2/en active Active
-
2016
- 2016-05-23 CN CN201680033355.8A patent/CN107614854B/en not_active Expired - Fee Related
- 2016-05-23 WO PCT/JP2016/065195 patent/WO2016199570A1/en active Application Filing
- 2016-05-23 EP EP16807277.5A patent/EP3306061A4/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780065A (en) * | 1980-11-06 | 1982-05-19 | Sanyo Electric Co Ltd | Ink jet printer |
| US5511956A (en) * | 1993-06-18 | 1996-04-30 | Yamaha Hatsudoki Kabushiki Kaisha | High pressure fuel pump for internal combustion engine |
| JP2001164977A (en) * | 1999-12-08 | 2001-06-19 | Honda Motor Co Ltd | Engine control device |
| DE102006037170A1 (en) * | 2006-08-09 | 2008-02-14 | Robert Bosch Gmbh | Automotive fuel injection system for vehicles with electrically-operated servo-valves has two overlapping injection phases per injection cycle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016199570A1 (en) | 2016-12-15 |
| JP2017002770A (en) | 2017-01-05 |
| JP6545006B2 (en) | 2019-07-17 |
| CN107614854B (en) | 2020-11-17 |
| EP3306061A1 (en) | 2018-04-11 |
| EP3306061A4 (en) | 2019-01-16 |
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