CN85104734A - Fuel injection control apparatus for internal combustion engines - Google Patents
Fuel injection control apparatus for internal combustion engines Download PDFInfo
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- CN85104734A CN85104734A CN 85104734 CN85104734A CN85104734A CN 85104734 A CN85104734 A CN 85104734A CN 85104734 CN85104734 CN 85104734 CN 85104734 A CN85104734 A CN 85104734A CN 85104734 A CN85104734 A CN 85104734A
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- Prior art keywords
- acceleration
- fuel
- control apparatus
- engine
- fuel injection
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Abstract
Being used to regulate the basic injection pulse of nozzle ejection time is determined by engine revolution and air inflow.The calibration of basic injection pulse and compensation are provided by following formula:
Ti=Tp (1+Ka+Kb) wherein
Ti: the pulse width of the injection pulse after the calibration, determine the discharge time of nozzle by it;
Ka: by the definite calibration factor of acceleration figure;
Kb: by the definite calibration factor of deceleration value before quickening.
Description
The present invention relates to the fuel injection control apparatus that a kind of internal-combustion engine is used, particularly relate to a kind of electronic controller that fuel injection apparatus is used, in this fuel injection apparatus, oil sprayer is contained in before the branch point of inlet manifold, can be to all cylinders or certain several cylinders while fuel feeding of internal-combustion engine.
In the fuel injection apparatus of internal-combustion engine,, perhaps make failure of oil feed because engine retard sharply descends the fuel amount of being sprayed.The present invention is intended to reduce the bicarbonate in the exhaust, and improves the rate of combustion of fuel oil.
That is to say that in such fuel injection apparatus, just in time before the branch point of the inlet manifold that each cylinder connected, the distance of the inlet manifold between oil sprayer and its pairing cylinder just becomes quite long in the position of oil sprayer.Therefore, in the working procedure of motor, the fuel oil particle after the oil sprayer atomizing is bonded at the inlet manifold inwall, forms oil film attached on the inwall.Under such certain situation, if being effective fuel oil control by to work the time, engine retard begins down, the most oil films that then accumulated all are inhaled in the firing chamber of motor, so that make the mixture of air and the fuel oil overrich that becomes in a flash.
For fear of above-mentioned phenomenon occurring, when engine retard, fuel injection amount sharply descends, perhaps failure of oil feed.Yet according to these measures, when fuel oil reduces or end, the oil film burden will fully be evaporated, and cause the inlet manifold tube wall to become very dry.
In addition, the interim measure such as quick acceleration, the dense notion of acceleration be known (referring to the 12nd page of SAE technical report book series No. 800164 " throttle fuel injection (TBI)-integrated type engine control system ", right side column, two sections." transition fuel oil (acceleration thickens) ".In this piece report, speak of, fill this situation of oil film of being accumulated on dynamics and the menifold wall, require to have extra fuel oil according to inlet manifold.
But in these cases, motor quickens after it slows down at once again, and it is fully not enough quickening to thicken according to the scheme of being introduced in this piece report.In other words, the inlet manifold tube wall is closely related with degree of deceleration or the level quickening to be carried out before the beginning in dry degree.Degree of deceleration or retardation level are bigger or higher, and it is drier that the inlet manifold tube wall then becomes, and therefore, if retardation level is high especially, the inlet manifold tube wall is then dry especially.Its result is exactly, in acceleration thereafter, and the acceleration that injected fuel contains this fuel oil composition that thickens, the major part of this injected fuel just is used for the surface of wetting inlet manifold inwall so just causing the mixture of fuel oil thinning.This factor will cause that the ratio of occupying of the oxious component of discharging in the gas increases, and makes acceleration slow simultaneously.
The purpose of this invention is to provide a kind of fuel injection control apparatus, it can prevent that fuel oil mixture is thinning.Even when motor slowing down and fuel injection rate is reduced to very low value in addition near null value after quicken at once, can prevent that also fuel oil mixture is thinning.
Characteristics of the present invention are, when motor has slowed down and fuel injection rate is reduced to very low even when being substantially zero, according to degree of deceleration and normal quicken to thicken outside, the present invention can realize that the additional acceleration of fuel oil thickens.
Fig. 1 illustrates the embodiment Block Diagram according to fuel injection control apparatus of the present invention;
Fig. 2 is the control flow chart of using when explaining embodiment work shown in Figure 1.
Referring to Fig. 1, the throttle body of label 2 expression carburetter bodies, in the throttle body of carburetter body, nozzle 4 and throttle 6 are contained on the supporting element commonly used.By fuel pipe 5 to nozzle 4 fuel feeding.The signal that the controller that will introduce according to the back sends makes fuel-oil atmozation by nozzle 4.Fuel oil after the atomizing and air are delivered in the cylinder of motor by inlet manifold together.In this figure, the inlet manifold 8 that only drawn a cylinder and this cylinder link to each other with carburetter body throttle body 2, but under normal conditions, all be that a plurality of cylinders are arranged, and the inlet manifold that connects corresponding cylinder and Carburetor joint gate segment 2.Under the situation of suction process,, the fuel oil mixture after air and nozzle 4 atomizings is sucked in the cylinder by corresponding inlet manifold.Nozzle 4 injected fuel must be synchronous with the suction process of each cylinder.
Being constructed as follows of the controller of above-mentioned fuel injection apparatus.That is to say, in this figure, the temperature of cooling water in temperature transducer 10 detection of engine, and produce an output signal t.CKP 12 is contained on the distributor (not shown), detects the corner of bent axle with it, exports a signal with information of CAP P and engine revolution N thus.Pneumatic sensor 14 is contained on the carburetter body throttle body 2, measuring the air inflow of motor, and produce one with the corresponding signal Q of the air inflow that records
a
T, N and Q
aDeliver in the basic injection pulse generator 16 Deng signal, it determines the width of injection pulse according to the value of above-mentioned each signal.In the time of this pulse width, carry out the injection of fuel oil by nozzle 4.The repetition frequency of injection pulse depends on the output value N of CKP 12.From according to engine revolution N and air inflow Q
a, that is to say to get in the represented pulse width matrix of engine load and select a value, just can determine pulse width.The injection pulse of being tried to achieve by this mode can be by the signal t calibration of temperature transducer 10 when the cold operation.In order to determine basic injection pulse, can consider contained oxygen concentration in the gas of discharging, in outlet pipe, load onto oxygen sensor and can test contained oxygen concentration.But the present invention is not engaged in the work that how to determine basic injection pulse aspect.Therefore omit about determine further specifying of method based on injection pulse.But the present invention determines that based on above-mentioned signal parameter the method for basic injection pulse all can adopt to all, and these signals of representing motor basic status parameter are signals such as temperature of the angle position that resembles the engine revolution introduced the front, bent axle, air inflow, cooling water.
Work at motor is under the situation of steady state, delivers to driving mechanism 24 by the basic injection pulse that aforesaid way obtains by acceleration prover 22 described below.Yet,, require basic injection pulse is compensated or calibrates if motor quickens.At first, detect the unlatching of throttle 6 by throttle sensor 18.Start signal θ is delivered in the acceleration level discriminator 20, in this discriminator, acceleration level is identified.Acceleration level is the variance ratio (d with start signal
θ/ d
t) expression.d
θ/ d
tValue is bigger, and acceleration level is higher.With this acceleration level signal d
θ/ d
tDeliver in the acceleration prover 22, just can be at basic injection pulse to d
θ/ d
tCalibrate or or compensation.For example, calibration value or offset are added on the pulse width of basic injection pulse, just can obtain:
T
c＝T
p（1+K
a）
In the formula:
T
cThe pulse width of the injection pulse the after-calibration, it is the output of acceleration prover 22;
T
pThe pulse width of the basic injection pulse output waveform of-basic injection pulse generator 16;
K
a-with differentiate after the corresponding calibration factor of acceleration level value.
Having pulse width is T
cSignal deliver to driving mechanism 24, driving mechanism makes nozzle 4 action.Because nozzle 4 is with the constant compression force fuel feeding, it is by pulse width T
cCorresponding fuel amount injected fuel.In the fuel oils that all spray corresponding to T
pK
aAmount of fuel mean that just aforementioned acceleration thickens.After thickening, this acceleration is referred to as " the normal acceleration thickens ", because this thickening obtains when motor normally quickens work.Here the acceleration that said normal acceleration obtains when being meant engine steady state work in succession in other words, is the acceleration that obtains in SUCCESSIVE ACCELERATION PROCESS.
With above said different, if be before quickening, slow down at once, such just as what narrated hereinafter, the injection pulse of calibration above-mentioned further be compensated or proofread and correct.
It is to be in neutral position that neutral position sensor 28 detects the speed changer (not shown), and signal is exported to deceleration detector 32.It is to be in the throttle neutral that throttle neutral sensor 30 detects throttle 6, and produces an output signal, delivers on the deceleration detector 32.Detector 32 receives that it was to be in deceleration regime that deceleration detector 32 detects motor when the engine revolution signal was also received transmission neutral position signal and throttle neutral signal simultaneously.Retardation level is concluded by retardation level discriminator 34.Retardation level is by the variance ratio (d of engine revolution
N/ d
t) expression.d
N/ d
tValue is bigger, and retardation level is higher.
The retardation level signal is delivered to additional acceleration prover 36, in prover 36, determines additional calibration or penalty coefficient K according to retardation level
bCOEFFICIENT K
bBe added in the acceleration prover 22, in prover, carry out following calibration or compensation.
T
i＝T
p（1+K
a+K
b）
T in the formula
iThe width of the injection pulse of the last calibration of expression, injection pulse width just becomes the input signal of driving mechanism 24.In whole injected fuel, with T
pK
bCorresponding amount of fuel is referred to as " the additional acceleration thickens " hereinafter.
From above-mentioned situation as seen, acceleration according to the present invention thickens, can think to comprise thicken composition and normal quicken to thicken composition of additional acceleration, the former is by relevant with the retardation level before the additional speed, and the latter is relevant with the level of the acceleration again after finishing of slowing down.
In Fig. 1, provide embodiments of the invention, it is by constituting with single instrument or device of separating.In fact, except sensor 10,12,14,18,28,30 and driving mechanism 24, the various functions that each instrument or device are finished are finished by the data into electronic data processing with suitable interface among the figure.
Under the situation of the control gear that constitutes by sort processor, come the interpreter operation process with Fig. 2.
At first, detect engine revolution N in the 100th step.In 102 and 104 steps, conclude that whether motor is in deceleration regime.If not, control flow jumps to basic injection pulse generating routine 106.As mentioned previously, application of the present invention is not limited to produce any specific process of basic injection pulse itself.Therefore,, omitted the details of this program 106 here, this is for for the purpose of brief or for simple description.
When motor is in deceleration regime, by 108 steps and 118 steps judgement d
N/ d
tValue.In this case, for two parameter N of retardation level
aAnd N
β(N
α＞N
β) will put in advance and decide, three COEFFICIENT K of standard and compensation usefulness are proposed according to retardation level
B1, K
B2, K
B3If d
N/ d
t＞N
α, then select COEFFICIENT K
B3; If at N
α〉=d
N/ d
t＞N
βUnder the situation, then select K
B2; If d
N/ d
t≤ N
β, then select COEFFICIENT K
B1In case of necessity, selected COEFFICIENT K
bCan compensate by the temperature t of cooling water, shown in 111 steps.In this case, temperature correction should so be carried out, and the temperature of cooling water is higher, and the fuel quantity of injection changes fewlyer.Therefore, in 112 steps, with determined COEFFICIENT K
bBe stored in the storage.Here, calibration factor K
bNumber be not limited to three, but can in given number, select according to institute's requirement.
In the method, motor is in during the deceleration regime, and retardation level is constantly differentiated, is stored by the determined typical coefficient of retardation level.From this state, if require to quicken, this fact will cause that the unlatching value θ of throttle 6 changes.Therefore, by 114 steps detection unlatching value θ, and by 116 steps and 118 steps discriminating acceleration level d
θ/ d
tAcceleration level is differentiated employing and the same method of retardation level discriminating.That is to say: put two parameter value θ that stand oil door 6 is opened in advance
aAnd θ
β(θ
α＞θ
β), to provide three COEFFICIENT K of calibration or compensation usefulness according to the acceleration level of being differentiated simultaneously
α 1, K
α 2, K
α 3At d
θ/ d
t＞θ
αUnder the situation, choose COEFFICIENT K
α 3; At θ
α〉=d
θ/ d
t＞θ
βUnder the situation, choose COEFFICIENT K
α 2; At d
θ/ d
t≤ θ
βUnder the situation, choose COEFFICIENT K
α 1In 120 steps, with the COEFFICIENT K of determining like this
αStore.With calibration factor K
bThe sort of situation is similar, the calibration factor K that is used to quicken
αNumber be not limited to three, in case of necessity, it can be provided arbitrarily.
The COEFFICIENT K of being deposited in 112 and 120 steps
bAnd K
αData, carry out compensation and calibration by 122 steps.The injection pulse that can obtain calibrating so just.As its component, it comprises that normal acceleration thickens and adds and quicken to thicken two-part.
That in the above-described embodiments, quickens and slow down concludes by throttle opening angle and engine revolution decision.But,, also can utilize air inflow θ for reaching this purpose
αVariance ratio or the negative pressure p of inlet manifold
vIn this case, utilize d
θ α/ d
tOr dp
v/ d
tConclude and quicken or retardation level.
By above-mentioned the present invention, slowed down and after fuel injection rate was reduced to low-down level even zero, when engine accelerated at once, fuel oil energy sprayed with iptimum speed at engine. So, can prevent in the exhaust content of oxious component increase and accelerate slow.
Claims (4)
1, a kind of fuel injection control apparatus that is used for internal-combustion engine.Wherein, injected fuel oil quantum is regulated by basic injection pulse.Injection pulse then obtains according to the basic parameter of representing engine behavior, when engine retard.It is reduced to a very low level or reduces to zero substantially, and when after slowing down, quickening again.Thicken with the determined acceleration of acceleration figure again and to calibrate.It is characterized by: the amount of fuel of further calibrating injection according to the additional device that quickens to thicken of the deceleration value utilization before quickening again.
2, as in the defined fuel injection control apparatus of claim 1, above-mentioned deceleration value is differentiated by the reduced rate of engine revolution.
3,, wherein thicken and the thicken discharge time Ti of the nozzle after the standard of described additional acceleration is provided by following formula by above-mentioned acceleration as fuel injection control apparatus claimed in claim 1:
T
i＝T
p（1+K
a+K
b）
Wherein:
T
p: the discharge time of basic injection pulse decision;
K
a: the calibration factor definite according to acceleration level;
K
b: by the definite typical coefficient of retardation level before quickening.
4, as the defined fuel injection control apparatus of claim 3, wherein calibration factor K
aAnd K
bHave at least one will put in advance calmly, thereby when the temperature of engine cooling water raise, the amount of fuel of injection reduced.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104734A CN85104734B (en) | 1985-06-20 | 1985-06-20 | Fuel injection control apparatus for internal combustion engines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85104734A CN85104734B (en) | 1985-06-20 | 1985-06-20 | Fuel injection control apparatus for internal combustion engines |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85104734A true CN85104734A (en) | 1986-12-17 |
| CN85104734B CN85104734B (en) | 1987-12-16 |
Family
ID=4794023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85104734A Expired CN85104734B (en) | 1985-06-20 | 1985-06-20 | Fuel injection control apparatus for internal combustion engines |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85104734B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366881C (en) * | 2001-08-02 | 2008-02-06 | 三国股份有限公司 | Fuel injection method |
| CN101275493B (en) * | 2007-03-30 | 2012-10-10 | 光阳工业股份有限公司 | Reduced speed method of motorcycle injection type engines |
| CN101550878B (en) * | 2003-03-28 | 2012-11-28 | 雅马哈发动机株式会社 | Idle speed controller of internal combustion engine |
| CN113217248A (en) * | 2021-06-02 | 2021-08-06 | 江门市大长江集团有限公司 | Motorcycle, fuel injection amount control method and device, and computer readable storage medium |
-
1985
- 1985-06-20 CN CN85104734A patent/CN85104734B/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100366881C (en) * | 2001-08-02 | 2008-02-06 | 三国股份有限公司 | Fuel injection method |
| CN101550878B (en) * | 2003-03-28 | 2012-11-28 | 雅马哈发动机株式会社 | Idle speed controller of internal combustion engine |
| CN101275493B (en) * | 2007-03-30 | 2012-10-10 | 光阳工业股份有限公司 | Reduced speed method of motorcycle injection type engines |
| CN113217248A (en) * | 2021-06-02 | 2021-08-06 | 江门市大长江集团有限公司 | Motorcycle, fuel injection amount control method and device, and computer readable storage medium |
| CN113217248B (en) * | 2021-06-02 | 2022-08-16 | 江门市大长江集团有限公司 | Motorcycle, fuel injection amount control method and device, and computer readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85104734B (en) | 1987-12-16 |
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