CN105115732B - Method of estimation and device for explosive motor unusual condition - Google Patents
Method of estimation and device for explosive motor unusual condition Download PDFInfo
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- CN105115732B CN105115732B CN201510431398.9A CN201510431398A CN105115732B CN 105115732 B CN105115732 B CN 105115732B CN 201510431398 A CN201510431398 A CN 201510431398A CN 105115732 B CN105115732 B CN 105115732B
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Abstract
Embodiment of the invention discloses that a kind of method of estimation and device for explosive motor unusual condition, the explosive motor includes multiple cylinders and the bent axle associated with the multiple cylinder.Methods described includes：Detect multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders respectively；The multiple angular acceleration information is compared to each other；And in response between the multiple angular acceleration information existing difference be more than a preset value, determine that at least one cylinder in the explosive motor has unusual condition.Therefore, embodiments of the invention can detect that each cylinder in explosive motor whether there is unusual condition exactly, without increasing single hardware newly in engine, realize the minimum of cost.
Description
Technical field
The present invention relates to vehicle electric field, and more particularly it relates to a kind of be used for explosive motor exception
The method of estimation and device of situation.
Background technology
Explosive motor is a kind of dynamic power machine, and it is the heat burnt and released in cylinder interior by fuel
The Thermal Motor of power can be converted directly into.Specifically, explosive motor is provided with one or more cylinders, each cylinder
All include the piston that rotation bent axle is connected to by connecting rod.Fuel and air mixture is injected into the combustion chamber of each cylinder
In and light, cause the reciprocating inflation gas of piston to produce.Then, bent axle bears the power that connecting rod transmits, and will
It is changed into moment of torsion to drive other annexes on engine to be operated.
Easily there are various unusual conditions due to its accurate operation principle in explosive motor, and the unusual condition may
The dynamic property and economy that engine can be caused decline, for example, it may be possible to cause the engine occur operating powerless, oil consumption increase,
A series of failures such as starting difficulty.
Therefore, in order to detect whether explosive motor unusual condition occurs, a kind of cylinder monitoring is currently provided
Device, it is mainly used in detecting cylinder Key Performance Indicator by the sensor arranged in cylinder to judge engine
Whether unusual condition is occurred.However, because explosive motor often has multiple cylinders, so this kind of cylinder monitoring dress
Needs are put same sensor is installed in each cylinder to be monitored each cylinder, this undoubtedly add maintenance into
This.Simultaneously as automobile engine cylinder Key Performance Indicator can not often reflect the service behaviour of cylinder comprehensively,
So still it can not fully detect whether automobile engine cylinder breaks down at present.
Therefore, it is necessary to which a kind of method of estimation and device for explosive motor unusual condition solves the above problems.
The content of the invention
In order to solve the above-mentioned technical problem, it is according to an aspect of the invention, there is provided a kind of different for explosive motor
The method of estimation of normal situation, the explosive motor include multiple cylinders and the bent axle associated with the multiple cylinder, the side
Method includes：Detect multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders respectively；To described
Multiple angular acceleration information are compared to each other；And in response between the multiple angular acceleration information existing difference it is big
In a preset value, determine that at least one cylinder in the explosive motor has unusual condition.
In addition, according to another aspect of the present invention, there is provided a kind of estimation unit for explosive motor unusual condition,
The explosive motor includes multiple cylinders and the bent axle associated with the multiple cylinder, and described device includes：Infomation detection list
Member, for detecting multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders respectively；Information ratio
Compared with unit, for being compared to each other to the multiple angular acceleration information；And situation determining unit, in response in institute
Existing difference is more than a preset value between stating multiple angular acceleration information, determines at least one gas in the explosive motor
Unusual condition be present in cylinder.
Compared with prior art, using the method for estimation for explosive motor unusual condition according to embodiments of the present invention
And device, the multiple angles that can detect the bent axle caused by the work event of multiple cylinders of explosive motor respectively add
Velocity information, and consistency analysis is carried out to the multiple angular acceleration information, so that it is determined that being in the explosive motor
It is no with the presence of cylinder unusual condition.Therefore, embodiments of the invention can detect each gas in explosive motor exactly
Cylinder whether there is unusual condition, without increasing single hardware newly in engine, realize the minimum of cost.Specifically, originally
The embodiment of invention can allow equipment vendors' can before engine is installed into the machine tool of such as vehicle etc
Determine whether engine is assembled by mistake, without buying optional equipment, this make it that the cost for correcting assembly problem is lower；This
Outside, the quality for the engine for leaving assembling factory can also potentially be improved.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
Accompanying drawing is used for providing a further understanding of the present invention, and a part for constitution instruction, the reality with the present invention
Apply example to be used to explain the present invention together, be not construed as limiting the invention.In the accompanying drawings：
Fig. 1 illustrates the basic structure of explosive motor according to embodiments of the present invention.
Fig. 2 illustrates the flow chart of the method for estimation for explosive motor unusual condition according to embodiments of the present invention.
Fig. 3 illustrates the institute caused by the work event of each cylinder of explosive motor according to embodiments of the present invention
State the curve of cyclical fluctuations of the instantaneous angular acceleration values of bent axle.
Fig. 4 illustrates the block diagram of the estimation unit for explosive motor unusual condition according to embodiments of the present invention.
Fig. 5 illustrates the block diagram of engine testing system according to embodiments of the present invention.
Embodiment
It will be described in detail with reference to the accompanying drawings each embodiment according to the present invention.Here it is to be noted that it in the accompanying drawings,
Identical reference, which is assigned, substantially has the part of same or like 26S Proteasome Structure and Function, and will omit on it
Repeated description.
First, the basic structure of explosive motor is there will be briefly described, in order to more fully understand embodiments of the invention.
Fig. 1 illustrates the basic structure of explosive motor according to embodiments of the present invention.
As illustrated in figure 1, explosive motor 10 is a kind of complex machines being made up of many mechanisms and system, typically
It includes two following critical pieces：Toggle and valve actuating mechanism.
The toggle is that engine realizes working cycles, completes the main movement part of energy conversion, and one
As be made up of cylinder 11, piston 12, connecting rod 13 and bent axle 14 etc..
Cylinder 11 is a cylindrical metal parts.The cylinder 11 of sealing is to realize working cycles, produce the source of power.
Each cylinder 11 equipped with cylinder jacket is arranged in the body of engine 10, and its top is enclose with cylinder head.Piston 12 can
Moved back and forth in cylinder jacket, and from the bottom closed cylinder 11 of cylinder 11, so as to form the sealing space that volume makees rule change.
Fuel burns in this space, and caused gas power promotes piston 12 to move.
By taking four-stroke engine as an example, in expansion space stroke, piston 12 bears gaseous-pressure and makees straight line fortune in cylinder 11
It is dynamic, the rotary motion of bent axle 14 is converted into by connecting rod 13, and power is externally exported from bent axle 14；And in air inlet, compression and row
In gas stroke, crankshaft-flywheel releases energy and the linear motion the convert rotational motion of bent axle 14 into piston 12, so repeatedly
Fuel is constantly converted into power output in the released heat energy of cylinder interior burning.
The valve actuating mechanism is used for job order and the course of work according to engine, combustion mixture or air is entered gas
Cylinder 11, and waste gas is discharged out of cylinder 11, realize scavenging period.It is typically by inlet valve 15, exhaust valve 16, the and of timing chain 17
The grade of camshaft 18 forms.
Camshaft 18 is linked via timing chain 17 (alternatively, can also use gear or adhesive tape etc.) with bent axle,
For controlling unlatching and the closed action of inlet valve 15 and exhaust valve 16.Specifically, camshaft 18 is according to each cylinder of engine
The working cycles carried out in 11 and the requirement of ignition order, periodically open and close inlet valve 15 and the exhaust of each cylinder 11
Door 16, makes fresh combustion mixture (gasoline engine) or air (diesel engine) be able to timely enter cylinder 11, waste gas is able in time
Discharge, and compressed with expansion space stroke, closing each valve to ensure the sealing of combustion chamber from cylinder 11.
Easily there are various unusual conditions due to its accurate operation principle in explosive motor.
For example, engine shop business often designs and manufactured the engine of different model.For example, the hair of different model
Motivation may have different compression ratios.This different compression ratios can pass through the piston of different height or the connecting rod of different length
To realize.However, because the frequent very little of vision difference between the piston and connecting rod for different compression ratios is (for example, in length
On only exist 1.8mm difference), so, when assembling engine, it is likely that so that the vicious component of engine assembly,
Or in the worst case, it is equipped with the mixture of different components.
For example, by taking 4 Cylinder engines as an example, under normal circumstances under, it, which should have, is equipped with designed for identical compression
The piston of ratio and the 4 of connecting rod cylinders.However, because equipment is slipped up, it, which may mistakenly have, is equipped with designed for compression
Than A (for example, 10:1) piston and 3 cylinders of connecting rod and it is equipped with designed for compression ratio B (for example, 8.5:1) piston
With 1 cylinder of connecting rod.This may cause the difference cylinder in engine to produce different output power, cause the engine to go out
The problems such as now operating mismatch.
In addition, for example, it is still possible that in one or more cylinders, piston or valve may be due to failures or excessive
Without sealing exactly, this will cause them to reveal excess air for abrasion.The effect of this leakage is identical with low compression ratio
's.
Whether engine is mainly detected by a kind of special hardware unit (that is, cylinder monitoring device) at present
There is any unusual condition.The cylinder monitoring device mainly detects cylinder by using the sensor in cylinder
Key Performance Indicator judges whether engine occurs unusual condition.However, because explosive motor often has multiple cylinders,
So this kind of cylinder monitoring device needs install same sensor in each cylinder and each cylinder could be entered
Row monitoring, this undoubtedly adds maintenance cost.Simultaneously as automobile engine cylinder Key Performance Indicator often can not be comprehensive
Reflect the service behaviour of cylinder, so still can not fully detect whether automobile engine cylinder occurs event at present
Barrier.
For above-mentioned technical problem, the present inventor expects：Because under normal circumstances, each cylinder of explosive motor exists
Caused by the work event of same time point in one work period engine speed change amplitude should be it is consistent,
So the angular acceleration information of the bent axle that can be by detection caused by the work event of each cylinder, and to institute
State multiple angular acceleration information and carry out consistency analysis, so that it is determined that whether with the presence of the abnormal shape of cylinder in the explosive motor
Condition.
Hereinafter, estimating for explosive motor unusual condition according to embodiments of the present invention will be described with reference to Figure 2
The overall procedure example of meter method.
Fig. 2 illustrates the flow chart of the method for estimation for explosive motor unusual condition according to embodiments of the present invention.
As shown in Fig. 2 the method for estimation for explosive motor unusual condition can include：
In step s 110, the multiple angles for detecting the bent axle caused by the work event of multiple cylinders respectively accelerate
Spend information.
In an embodiment of the present invention, the work of each cylinder by engine respectively can be detected by various modes
Make the angular acceleration information of the bent axle caused by event.
For example, in a dust cycle, cylinder can include 4 work events, respectively air-breathing, compression, work
Work(and exhaust.
Moved in expiratory phase, IO Intake Valve Opens, exhaust valve closing, piston from top dead centre to lower dead center, above piston
Volume of cylinder increases, and produces vacuum, and inner pressure of air cylinder is dropped to below admission pressure, under pull of vacuum effect, passes through carburetion
Device or the gasoline of gasoline injection system atomization, combustion mixture is mixed to form with air, and cylinder is sucked by air intake duct and inlet valve
It is interior.Intake process is continued up to untill piston crossed lower dead center IC Intake Valve Closes.
In compression stage, inlet and exhaust valve Close All, combustion mixture in up piston compressing cylinder, mixture temperature liter
Height, pressure rise.
In power stage, the spark plug above cylinder head sends electric spark, lights compressed combustion mixture.Can
Substantial amounts of heat is released after combustion mixture combustion, In-cylinder Combustion Pressure and temperature rise rapidly.High-temperature high-pressure fuel gas promote piston
Quickly moved to lower dead center, the linear motion of connecting rod is converted into the rotary motion of bent axle, externally to export power.In power stage
During beginning, inlet and outlet door is turned off.
In exhaust phase, exhauxt valve opens, because at this moment in-cylinder pressure superatmospheric power, high-temp waste gas discharge rapidly gas
Cylinder, this stage belong to the free exhaust stage, and high-temp waste gas is discharged with local velocity of sound by exhaust valve.Enter to advance with exhaust process
Enter the forced exhaust stage, piston is crossed lower dead center and moved to top dead centre, forces to discharge exhaust gas inside cylinder, and it is attached that piston reaches top dead centre
When near, exhaust process terminates.
Typically, it is 2 Stroke Engines that bent axle, which turns around and can complete the engine of a dust cycle, that is,
Say, a dust cycle of 2 Stroke Engines is made up of 2 piston strokes；On the contrary, bent axle, which takes two turns, just completes one
The engine of dust cycle is 4 Stroke Engines, that is to say, that a dust cycle of 4 Stroke Engines is by 4
Piston stroke forms.
In one embodiment, can use in the crankshaft position sensor for burning with being generally equipped with compression engine
(CPS) above-mentioned angular acceleration information detection operations are carried out.
Therefore, in addition to each part illustrated in Fig. 1, the explosive motor can also include being placed adjacent to institute
State the crankshaft position sensor of bent axle.Correspondingly, step S110 can include：Measured using the crankshaft position sensor
The multiple angular acceleration information.
Typically, crankshaft position sensor is typically mounted in ignition distributor, be in control system most important sensor it
One.Its effect has：Detect speed of crankshaft, therefore also known as speed probe；Piston top dead center position is detected, therefore also referred to as above only
Point sensor, including detection are used to control each cylinder top dead centre signal of igniting, the first cylinder top dead centre for control sequence oil spout
Signal.
So, detected respectively caused by the work event of each cylinder of engine by crankshaft position sensor
The bent axle angular acceleration information, the minimum of cost can be realized without increasing single hardware newly in engine.
It should be noted that although here to this hair exemplified by carrying out measurement angle acceleration information using crankshaft position sensor
Bright embodiment is illustrated, and still, the invention is not restricted to this.For example, it is also possible to linked using being arranged in bent axle
Camshaft near CMPS Camshaft Position Sensor and multiple angles of the bent axle are measured by gearratio between the two
Acceleration information.
In view of following facts, i.e., explosive motor is in the case of accelerated service or operating of slowing down, by the every of engine
The rotation of the bent axle caused by the work event of one cylinder is it is possible that momentary fluctuation so that each cylinder is at one
The instantaneous angular acceleration values of the bent axle caused by the work event of same time point in dust cycle are likely to occur
Difference, cause to be difficult to correctly to carry out consistency analysis to the multiple angular acceleration information, it is therefore preferred that in a reality
Apply in example, can be when the explosive motor is in average constant rotating speed by the detection time selection of angular acceleration information
Phase.
It is therefore preferred that the multiple angular acceleration information is measured using the crankshaft position sensor to be included：
During the explosive motor is in average constant rotating speed period, measured using the crankshaft position sensor the multiple
Angular acceleration information.
For example, the period that the explosive motor is in average constant rotating speed can be engine be in it is idle when
Between section, for example, the idling can be 700 rpms (rpm) or 1,000rpm etc..
Typically, in the case that unusual condition is not present in each cylinder in explosive motor, for given
Average speed of crankshaft (that is, 1,000rpm) for, by work event (that is, air-breathing, compression, work done and the row of each cylinder
Gas) caused by instantaneous/actual speed of crankshaft (or angular acceleration) will be fluctuated according to similar to sinusoidal mode, this
It is due to caused by the compression and expansion of cylinder cycle.The compression ratio of cylinder is lower, or the gas leakage degree of cylinder is higher,
Then need smaller work done during compression, and thus, instantaneous/actual speed of crankshaft will fluctuate smaller.
Therefore, in an embodiment of the present invention, can be by described in caused by the work event to the multiple cylinder
Whether multiple angular acceleration information of bent axle carry out consistency analysis, so that it is determined that appointing in the explosive motor with the presence of cylinder
What unusual condition.
In one embodiment, the angular acceleration information can include：By each cylinder of the explosive motor
The instantaneous angular acceleration of the bent axle caused by the work event of same time point in one or more dust cycles
Value.
For example, it can be passed during the explosive motor is in average constant rotating speed period using the crank position
Sensor measures start time point in same dust cycle of each cylinder or terminated between time point or both
Any one other same time point work event caused by the bent axle instantaneous angular acceleration values.
Alternatively, the bent axle position can also be used during the explosive motor is in average constant rotating speed period
Sensor is put to measure the start time point or termination time point of each cylinder in different dust cycles or both
Between any one identical other times point work event caused by the bent axle instantaneous angular acceleration values.
In another embodiment, the angular acceleration information can include：By each cylinder of the explosive motor
The average value of the instantaneous angular acceleration values of the bent axle caused by work event in one or more dust cycles.
For example, it can be passed during the explosive motor is in average constant rotating speed period using the crank position
Sensor measures multiple time points or All Time point of each cylinder in an identical or different dust cycle
Work event caused by the bent axle multiple instantaneous angular acceleration values, and be directed to each cylinder, calculate these winks
When angular acceleration values average value.
Alternatively, the bent axle position can also be used during the explosive motor is in average constant rotating speed period
Put sensor measure multiple time points of each cylinder in identical or different multiple dust cycles or it is whole when
Between the bent axle caused by the work event put multiple instantaneous angular acceleration values, and be directed to each cylinder, calculate this
The average value of a little instantaneous angular acceleration values.
In another embodiment, the angular acceleration information includes：By each cylinder of the explosive motor one
The curve of cyclical fluctuations of the instantaneous angular acceleration values of the bent axle caused by the work event of dust cycle or by the internal combustion
The instantaneous angular acceleration of the bent axle caused by work event of each cylinder of engine in multiple dust cycles
The averaged curve of the curve of cyclical fluctuations of value.
For example, it can be passed during the explosive motor is in average constant rotating speed period using the crank position
Sensor measures the work event institute of All Time point of each cylinder in an identical or different dust cycle
Multiple instantaneous angular acceleration values of the caused bent axle, and each cylinder is directed to, draw these instantaneous angular acceleration values
The curve of cyclical fluctuations.
Alternatively, the bent axle position can also be used during the explosive motor is in average constant rotating speed period
Sensor is put to measure the work thing of All Time point of each cylinder in identical or different multiple dust cycles
Multiple instantaneous angular acceleration values of the bent axle caused by part, and each cylinder is directed to, according to corresponding working cycles
Cycle draws a plurality of curve of cyclical fluctuations of these instantaneous angular acceleration values, and calculates averaged curve to these curves of cyclical fluctuations.
In the step s 120, the multiple angular acceleration information is compared to each other.
After angular acceleration information corresponding with each cylinder is detected, the multiple angular acceleration information can be entered
Row consistency analysis.
In one embodiment, step S120 can include：By the work thing of any cylinder in the multiple cylinder
The angular acceleration information of the bent axle caused by part and the work event of remaining each cylinder in the multiple cylinder are led
The angular acceleration information of the bent axle caused is compared.
In step s 130, in response between the multiple angular acceleration information existing difference be more than a preset value,
Determine that at least one cylinder in the explosive motor has unusual condition.
Depending on consistency analysis result, it may be determined that whether the explosive motor has the gas that unusual condition be present
Cylinder.
In one embodiment, step S130 can include：In response to the specific cylinder in the multiple cylinder
The angular acceleration information of the bent axle caused by work event and the work thing of remaining multiple cylinder in the multiple cylinder
Existing difference is all higher than the preset value between the angular acceleration information of the bent axle caused by part, determines the internal combustion hair
Unusual condition be present in the specific cylinder in motivation.
Alternatively, in response to the angle of the bent axle caused by the work event of the specific cylinder in the multiple cylinder
The angular acceleration of acceleration information and the bent axle caused by the work event of remaining multiple cylinder in the multiple cylinder
Existing difference is respectively less than or equal to the preset value between information, determines the specific cylinder in the explosive motor not
Unusual condition be present.
Specifically, the preset value can be ratio.
For example, this ratio can be a percentage, for showing the adjustable rate of the cylinder.
In one example, if the angular acceleration information of the bent axle caused by the work event of a cylinder is than it
Difference between the average angular acceleration information of the bent axle caused by the work event of his cylinder is more than adjustable rate % (examples
Such as, 3%), then it can determine that the cylinder there may be unusual condition.
In one embodiment, the unusual condition can include：Wrong compression is assembled in the explosive motor
The cylinder of ratio, and/or the piston ring included in the cylinder or valve seat break down or by excessive wear.
In addition, include existing the cylinder of unusual condition this information in explosive motor to be fed back in time to user,
, can be to user feedback above- mentioned information so that user can carry out plant maintenance and replacing.
Therefore, in one embodiment, methods described can also include：
In step S140, to unusual condition described in user feedback.
In one embodiment, a display device can be separately provided to come to user feedback above- mentioned information.
For example, the display device can be several indicator lamps.Each corresponding cylinder of indicator lamp, works as detection
When there is unusual condition to some cylinder of engine, corresponding indicator lamp is lighted, and is easy to user (for example, installer, driving
Member, maintenance man etc.) understand the cylinder location to break down.
Alternatively, the display module can also be LCDs (LCD).When some cylinder of engine breaks down
When, LCDs can directly display the relevant information (for example, numbering) of the cylinder, remind user.
In another embodiment, an audio unit can also be separately provided to come to user feedback above- mentioned information.
For example, the audio unit can be loudspeaker.When some cylinder of automobile engine breaks down, loudspeaker hair
Go out alarm, remind user to there is cylinder unusual condition occur.In addition, loudspeaker can also directly report the related letter of problem cylinder
Breath (for example, numbering), reminds user.
As can be seen here, can be with using the method for estimation for explosive motor unusual condition according to embodiments of the present invention
Multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders of explosive motor respectively are detected, and
And consistency analysis is carried out to the multiple angular acceleration information, so that it is determined that whether with the presence of cylinder in the explosive motor
Unusual condition.
Therefore, embodiments of the invention can detect that each cylinder in explosive motor whether there is exception exactly
Situation, without increasing single hardware newly in engine, realize the minimum of cost.
Specifically, embodiments of the invention can allow equipment vendors that engine is being installed to the machine of such as vehicle etc
It is assured that whether engine is assembled by mistake before tool instrument, without buying optional equipment, this make it that correcting assembling asks
The cost of topic is lower；In addition it is also possible to potentially improve the quality for the engine for leaving assembling factory.
Below, the specific example of unusual condition method of estimation according to embodiments of the present invention will be described with reference to Figure 3.At this
In specific example, it is assumed that the explosive motor is four cylinder engine, for convenience's sake, is utilized respectively mark c1, c2, c3, c4
To identify the four of engine cylinders.
Fig. 3 illustrates the institute caused by the work event of each cylinder of explosive motor according to embodiments of the present invention
State the curve of cyclical fluctuations of the instantaneous angular acceleration values of bent axle.
As shown in figure 3, during explosive motor is in average constant rotating speed period, measure four cylinder c1, c2,
The instantaneous angular acceleration of the bent axle caused by the work event of the All Time point of c3, c4 in multiple dust cycles
Value, and each cylinder is directed to, a plurality of ripple of these instantaneous angular acceleration values is drawn according to corresponding dust cycle
Moving curve.For purpose of brevity, four cylinders c1, c2, c3, c4 only have been explicitly shown in figure 3 in 2 cycles (i.e. T1, T2)
The curve of cyclical fluctuations.
By being compared the bent axle as can be seen that a cylinder c4 to four cylinders c1, c2, c3, c4 curve of cyclical fluctuations
The curve of cyclical fluctuations of the curve of cyclical fluctuations of acceleration magnitude different from other three cylinders c1, c2, c3 crankshaft accelerations value.This may say
Bright two kinds of situations, i.e. situation A：There is unusual condition, or situation B in one cylinder c4：Three cylinders c1, c2, c3 occur simultaneously
Unusual condition.
Obviously, the probability that situation A occurs will be far longer than the probability of situation B appearance.
At this moment, can be determined whether using at least one of following two possible modes specific caused by problem
Reason：Engine can be disassembled and checked, check whether it assembles the cylinder of wrong compression ratio or at some
Whether the piston ring or valve seat that cylinder includes break down or by excessive wear；Alternatively, will can also break down
Start the angular acceleration information of bent axle that airborne measurements obtain and have been acknowledged the good bent axle for starting airborne measurements to obtain
Angular acceleration information be compared.If there is three cylinders on the engine of failure crankshaft angular acceleration information with
The crankshaft angular acceleration information of three cylinders is consistent on confirmed good engine, then may determine that there occurs above-mentioned feelings
Condition A；Otherwise it may determine that there occurs above-mentioned situation B.
Obviously, similarly, in the case of four cylinders c1, c2, c3, c4, if the crankshaft accelerations value of two cylinders
The curve of cyclical fluctuations be different from other two cylinders crankshaft accelerations value the curve of cyclical fluctuations, then this still can only illustrate certain two gas
There is unusual condition in cylinder.Next, can by further by above-mentioned two kinds it is possible in a manner of confirm which two gas bottom is
There is unusual condition in cylinder.
Hereinafter, estimating for explosive motor unusual condition according to embodiments of the present invention will be described with reference to Figure 4
The functional configuration block diagram of counter device.
Fig. 4 illustrates the block diagram of the estimation unit for explosive motor unusual condition according to embodiments of the present invention.
The method of estimation for explosive motor unusual condition illustrated in Fig. 2 can be interior by being used for illustrated in Fig. 4
The estimation unit 100 of burn engine unusual condition is realized.
As illustrated in figure 4, the unusual condition estimation unit 100 can be used for explosive motor, the internal-combustion engine
Machine includes multiple cylinders and the bent axle associated with the multiple cylinder.Also, the unusual condition estimation unit 100 can wrap
Include：
Information detecting unit 110, for detecting the more of the bent axle caused by the work event of multiple cylinders respectively
Individual angular acceleration information；
Information comparing unit 120, for being compared to each other to the multiple angular acceleration information；And
Situation determining unit 130, in response between the multiple angular acceleration information existing difference be more than one
Preset value, determine that at least one cylinder in the explosive motor has unusual condition.
In one embodiment, the explosive motor also includes the crank position sensing for being placed adjacent to the bent axle
Device.Correspondingly, described information detection unit 110 is detected respectively caused by the work event of multiple cylinders by following operation
Multiple angular acceleration information of the bent axle：The multiple angular acceleration information is measured using the crankshaft position sensor.
Preferably, described information detection unit 110 can operate with the crankshaft position sensor to survey by following
Measure the multiple angular acceleration information：During the explosive motor is in average constant rotating speed period, the bent axle is used
Position sensor measures the multiple angular acceleration information.
In one embodiment, the angular acceleration information can include：By each cylinder of the explosive motor
The instantaneous angular acceleration of the bent axle caused by the work event of same time point in one or more dust cycles
Value.
In another embodiment, the angular acceleration information can include：By each cylinder of the explosive motor
The average value of the instantaneous angular acceleration values of the bent axle caused by work event in one or more dust cycles.
In another embodiment, the angular acceleration information includes：By each cylinder of the explosive motor one
The curve of cyclical fluctuations of the instantaneous angular acceleration values of the bent axle caused by the work event of dust cycle or by the internal combustion
The instantaneous angular acceleration of the bent axle caused by work event of each cylinder of engine in multiple dust cycles
The averaged curve of the curve of cyclical fluctuations of value.
In one embodiment, described information comparing unit 120 can be by following operation to the multiple angular acceleration
Information is compared to each other：The angle of the bent axle caused by the work event of any cylinder in the multiple cylinder is accelerated
Spend information and the angular acceleration information of the bent axle caused by the work event of remaining each cylinder in the multiple cylinder
It is compared.
In one embodiment, the situation determining unit 130 can be by following operation in response at the multiple angle
Existing difference is more than a preset value between acceleration information, and it is different to determine that at least one cylinder in the explosive motor is present
Normal situation：Believe in response to the angular acceleration of the bent axle caused by the work event of the specific cylinder in the multiple cylinder
Between the angular acceleration information of the bent axle caused by the work event of breath and remaining multiple cylinder in the multiple cylinder
Existing difference is all higher than the preset value, determines that the specific cylinder in the explosive motor has unusual condition.
Specifically, the preset value can be ratio.
In one embodiment, described device can also include：Condition feedback unit 140, for described in user feedback
Unusual condition.
In one embodiment, the unusual condition includes：Wrong compression ratio is assembled in the explosive motor
Cylinder, and/or the piston ring included in the cylinder or valve seat break down or by excessive wear.
The tool of unit in the estimation unit 100 for explosive motor unusual condition of the embodiment of the present application
Body is configured and operation is had been described above in the method for estimation for explosive motor unusual condition referring to figs. 2 and 3 description in detail
It is thin to introduce, and therefore, its repeated description will be omitted.
As can be seen here, can be with using the estimation unit for explosive motor unusual condition according to embodiments of the present invention
Multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders of explosive motor respectively are detected, and
And consistency analysis is carried out to the multiple angular acceleration information, so that it is determined that whether with the presence of cylinder in the explosive motor
Unusual condition.Therefore, embodiments of the invention can detect each cylinder in explosive motor with the presence or absence of different exactly
Normal situation, without increasing single hardware newly in engine, realize the minimum of cost.
Finally, the functional configuration block diagram of engine testing system according to embodiments of the present invention will be described with reference to Figure 5.
Fig. 5 illustrates the block diagram of engine testing system according to embodiments of the present invention.
It is used for internal-combustion engine illustrated in the method for estimation and Fig. 4 for explosive motor unusual condition illustrated in Fig. 2
The estimation unit of machine unusual condition can apply to the engine testing system 1000 illustrated in Fig. 5.
As illustrated in fig. 5, the engine testing system 1000 can include：Engine management system (EMS) 200 and heat
Test equipment 300.
Engine management system 200 can be used for detecting respectively caused by the work event of multiple cylinders of engine
Multiple angular acceleration information of the bent axle, the angular acceleration information are at least one in the explosive motor for determining
Cylinder whether there is unusual condition.
Thermal test equipment 300 can be used for the user feedback unusual condition related to engine.
In one embodiment, the engine management system 200 can also be further used for multiple angles to the bent axle
Acceleration information is post-processed, to judge that at least one cylinder in explosive motor whether there is unusual condition.Specifically,
The engine management system 200 can also be compared to each other to the multiple angular acceleration information；And in response to described
Existing difference is more than a preset value between multiple angular acceleration information, determines at least one cylinder in the explosive motor
Unusual condition be present.
In a specific example, the method for estimation for explosive motor unusual condition according to embodiments of the present invention can
To be a kind of new function in engine management system 1000, it can activate/operate in engine management system (EMS)
In, for determining that the cylinder in the explosive motor whether there is unusual condition.
Potential physical principle is, instantaneous/actual for given average speed of crankshaft (that is, 1,000rpm)
Speed of crankshaft will be fluctuated according to similar to sinusoidal mode, this be due to cylinder cycle compression and expansion led
Cause.The compression ratio of cylinder is lower, or the gas leakage of cylinder is higher, then needs smaller work done during compression, and therefore, it is instantaneous/actual
Speed of crankshaft will fluctuate smaller.Vice versa, and compression ratio is higher, then instantaneously/actual speed of crankshaft will fluctuate bigger.
EMS can handle instantaneous crankshaft accelerations signal, to determine whether engine is assembled vicious hardware.
Therefore, for example, the New function in EMS can read crankshaft position sensor (CPS), to measure bent axle in average perseverance
Relative acceleration (Instantaneous Speed Fluctuations) during the period for determining engine speed.That is, EMS is used to be accurately read
CPS, and calculate crankshaft accelerations.In addition, EMS can realize a new function, for recording by each cylinder operation thing
Crankshaft accelerations caused by part.In order to relatively reliable, EMS can also calculate average crankshaft accelerations (in the period of at least 5 seconds
On, it is assumed that under 700rpm idle conditions).Then EMS can calculate the bent axle caused by the work event of each cylinder
Average acceleration.The average acceleration of the bent axle caused by the work event of difference cylinder next, EMS can be compared to each other
Degree.If the bent axle caused by the work event of the acceleration ratio of bent axle other cylinders caused by the work event of a cylinder
Average acceleration between difference be more than adjustable rate % (for example, 3%), then EMS thinks to there is currently fault message, and can
So that this is sent into Thermal test equipment.
Next, Thermal test equipment can be using communication means come to the user feedback fault message.For example, it can lead to
Cross setting DTC or by returning to " failure " value to diagnostics routines.
By activating/operating in the above-mentioned function in engine management system (EMS), it is allowed to which equipment vendors are by engine
Determine engine whether by mistake assembling before being installed to vehicle (this make it that the cost for correcting assembly problem is lower)；Allow equipment
Manufacturer determines assembly problem, without buying optional equipment；The quality for the engine for leaving assembling factory can potentially be improved.
It should be noted that although hereinbefore with the engine management system 200 to multiple angles of the bent axle
Acceleration information is illustrated exemplified by being post-processed, and still, the invention is not restricted to this.For example, above-mentioned function can also swash
Live/operate at the Thermal test equipment of engine equipment, that is to say, that can also be by motivation Thermal test equipment to crankshaft accelerations
Information is post-processed, rather than EMS post-processes to acceleration information, at least one in explosive motor so as to judge
Cylinder whether there is unusual condition.
In this manual, substantial amounts of detail is illustrated.It will be appreciated, however, that embodiments of the present invention can be with
Implement in the case of these no details.In some embodiments, be not been shown in detail known method, structure and
Technology, so as not to make reader obscure the understanding to the principle of this specification.
It will be understood by those skilled in the art that the module in the device in each embodiment can be carried out adaptively
Change, and they are arranged in one or more devices different from the embodiment.Except feature or processing mutually row
Outside the situation of reprimand, any combinations can be used, all modules of any device disclosed in this specification are combined.Remove
Non- to be expressly recited in addition, each feature disclosed in this specification can substitute spy by providing identical, equivalent or similar purpose
Levy to replace.
It should be noted that the present invention will be described rather than limits the invention for above-mentioned embodiment, and ability
Field technique personnel can design various alternate embodiments in the case of without departing from scope of the following claims.In right
In claim, the sequence of feature is not meant to any particular order of feature.On the contrary, these steps can be with any appropriate
Order perform.In detail in the claims, any reference marker in bracket should not be understood as to the limit to claim
System.Term " comprising " or "comprising" do not exclude the presence of module or step not listed in the claims.Positioned at module or step it
Preceding term "a" or "an" does not exclude the presence of multiple such modules or step.Term " first ", " second " and "
Three " etc. use does not indicate that any order, these terms can be construed into title.
Claims (20)
1. a kind of method of estimation for explosive motor unusual condition, it is characterised in that the explosive motor includes multiple
Cylinder and the bent axle associated with the multiple cylinder, methods described include：
Detect multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders respectively；
The multiple angular acceleration information is compared to each other；And
In response between the multiple angular acceleration information existing difference be more than a preset value, determine the explosive motor
In at least one cylinder unusual condition be present；In response between the multiple angular acceleration information existing difference be more than one
Preset value, determine that at least one cylinder in the explosive motor has unusual condition and included：
In response to the angular acceleration information of the bent axle caused by the work event of the specific cylinder in the multiple cylinder
Deposited between the angular acceleration information of the bent axle caused by the work event of remaining multiple cylinder in the multiple cylinder
Difference be all higher than the preset value, determine that the specific cylinder in the explosive motor has unusual condition.
2. method according to claim 1, it is characterised in that the explosive motor also includes being placed adjacent to the bent axle
Crankshaft position sensor,
Detecting multiple angular acceleration information of the bent axle caused by the work event of multiple cylinders respectively includes：
The multiple angular acceleration information is measured using the crankshaft position sensor.
3. method according to claim 2, it is characterised in that the multiple angle is measured using the crankshaft position sensor and is added
Velocity information includes：
During the explosive motor is in average constant rotating speed period, measured using the crankshaft position sensor described
Multiple angular acceleration information.
4. according to the method for any one of Claim 1-3, it is characterised in that the angular acceleration information includes：
By the work thing of same time point of each cylinder of the explosive motor in one or more dust cycles
The instantaneous angular acceleration values of the bent axle caused by part.
5. according to the method for any one of Claim 1-3, it is characterised in that the angular acceleration information includes：
Described in caused by work event of each cylinder in one or more dust cycles of the explosive motor
The average value of the instantaneous angular acceleration values of bent axle.
6. according to the method for any one of Claim 1-3, it is characterised in that the angular acceleration information includes：
By the bent axle of each cylinder caused by the work event of a dust cycle of the explosive motor
The curve of cyclical fluctuations of instantaneous angular acceleration values or by the explosive motor each cylinder multiple dust cycles work
Make the averaged curve of the curve of cyclical fluctuations of the instantaneous angular acceleration values of the bent axle caused by event.
7. method according to claim 1, it is characterised in that the multiple angular acceleration information is compared to each other including：
By the angular acceleration information of the bent axle caused by the work event of any cylinder in the multiple cylinder with it is described
The angular acceleration information of the bent axle caused by the work event of remaining each cylinder in multiple cylinders is compared.
8. method according to claim 1, it is characterised in that the preset value is ratio.
9. method according to claim 1, it is characterised in that methods described also includes：
To unusual condition described in user feedback.
10. method according to claim 1, it is characterised in that the unusual condition includes：Assembled in the explosive motor
The cylinder of wrong compression ratio and/or the piston ring included in the cylinder or valve seat break down or by excessive wear.
11. a kind of estimation unit for explosive motor unusual condition, it is characterised in that the explosive motor includes multiple
Cylinder and the bent axle associated with the multiple cylinder, described device include：
Information detecting unit, multiple angles for detecting the bent axle caused by the work event of multiple cylinders respectively accelerate
Spend information；
Information comparing unit, for being compared to each other to the multiple angular acceleration information；And
Situation determining unit, in response between the multiple angular acceleration information existing difference be more than a preset value,
Determine that at least one cylinder in the explosive motor has unusual condition；
The situation determining unit by it is following operation in response between the multiple angular acceleration information existing difference it is big
In a preset value, determine that at least one cylinder in the explosive motor has unusual condition：
In response to the angular acceleration information of the bent axle caused by the work event of the specific cylinder in the multiple cylinder
Deposited between the angular acceleration information of the bent axle caused by the work event of remaining multiple cylinder in the multiple cylinder
Difference be all higher than the preset value, determine that the specific cylinder in the explosive motor has unusual condition.
12. device according to claim 11, it is characterised in that the explosive motor also includes being placed adjacent to the bent axle
Crankshaft position sensor,
Described information detection unit detects the bent axle caused by the work event of multiple cylinders respectively by following operation
Multiple angular acceleration information：
The multiple angular acceleration information is measured using the crankshaft position sensor.
13. device according to claim 12, it is characterised in that described information detection unit operates with the song by following
Shaft position sensor measures the multiple angular acceleration information：
During the explosive motor is in average constant rotating speed period, measured using the crankshaft position sensor described
Multiple angular acceleration information.
14. according to the device of any one of claim 11 to 13, it is characterised in that the angular acceleration information includes：
By the work thing of same time point of each cylinder of the explosive motor in one or more dust cycles
The instantaneous angular acceleration values of the bent axle caused by part.
15. according to the device of any one of claim 11 to 13, it is characterised in that the angular acceleration information includes：
Described in caused by work event of each cylinder in one or more dust cycles of the explosive motor
The average value of the instantaneous angular acceleration values of bent axle.
16. according to the device of any one of claim 11 to 13, it is characterised in that the angular acceleration information includes：
By the bent axle of each cylinder caused by the work event of a dust cycle of the explosive motor
The curve of cyclical fluctuations of instantaneous angular acceleration values or by the explosive motor each cylinder multiple dust cycles work
Make the averaged curve of the curve of cyclical fluctuations of the instantaneous angular acceleration values of the bent axle caused by event.
17. device according to claim 11, it is characterised in that described information comparing unit is by following operation to the multiple
Angular acceleration information is compared to each other：
By the angular acceleration information of the bent axle caused by the work event of any cylinder in the multiple cylinder with it is described
The angular acceleration information of the bent axle caused by the work event of remaining each cylinder in multiple cylinders is compared.
18. device according to claim 11, it is characterised in that the preset value is ratio.
19. device according to claim 11, it is characterised in that described device also includes：
Condition feedback unit, for unusual condition described in user feedback.
20. device according to claim 11, it is characterised in that the unusual condition includes：Filled in the explosive motor
Cylinder with wrong compression ratio and/or the piston ring or valve seat that include in the cylinder break down or by excessive wear.
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| CN201510431398.9A CN105115732B (en) | 2015-07-22 | 2015-07-22 | Method of estimation and device for explosive motor unusual condition |
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| CN107677356A (en) * | 2017-09-26 | 2018-02-09 | 重庆长安汽车股份有限公司 | The method of engine body abnormal sound is differentiated using vibration characteristics |
| CN110349293A (en) * | 2019-07-16 | 2019-10-18 | 深圳市智物联网络有限公司 | Engine abnormity shuts down detection method, system, device and storage medium |
| CN114320596B (en) * | 2021-12-06 | 2023-05-23 | 潍柴动力股份有限公司 | Parallel operation monitoring method and device for diesel engine, electronic equipment and medium |
| CN115263577B (en) * | 2022-06-28 | 2024-04-16 | 东风汽车集团股份有限公司 | Compression ignition engine control method and related equipment |
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| JPH04109062A (en) * | 1990-08-28 | 1992-04-10 | Hitachi Ltd | Abnormal combustion detecting device and torque control device for internal combustion engine |
| US5544058A (en) * | 1992-10-20 | 1996-08-06 | Mitsubishi Denki Kabushiki Kaisha | Misfire detecting apparatus for a multi-cylinder internal combustion engine |
| US6993427B2 (en) * | 2002-09-03 | 2006-01-31 | Toyota Jidosha Kabushiki Kaisha | Combustion state estimating apparatus for internal combustion engine |
| JP2007327406A (en) * | 2006-06-07 | 2007-12-20 | Toyota Motor Corp | Control device and control method for internal combustion engine |
| JP5026334B2 (en) * | 2008-05-15 | 2012-09-12 | 三菱電機株式会社 | Angular velocity and angular acceleration calculation device, torque estimation device, combustion state estimation device |
| CN102980777B (en) * | 2012-12-21 | 2015-05-13 | 潍柴动力股份有限公司 | Method and equipment for detecting misfiring of diesel engine based on single-cylinder angular acceleration |
| CN102980778B (en) * | 2012-12-21 | 2015-07-08 | 潍柴动力股份有限公司 | Method and equipment for detecting misfire of diesel engine |
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