CN106768613A - The measurement apparatus of combustion knock - Google Patents
The measurement apparatus of combustion knock Download PDFInfo
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- CN106768613A CN106768613A CN201611120703.3A CN201611120703A CN106768613A CN 106768613 A CN106768613 A CN 106768613A CN 201611120703 A CN201611120703 A CN 201611120703A CN 106768613 A CN106768613 A CN 106768613A
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- pinking
- knock
- cylinder pressure
- determiner
- peak value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L23/00—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
- G01L23/22—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines
- G01L23/221—Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid for detecting or indicating knocks in internal-combustion engines; Units comprising pressure-sensitive members combined with ignitors for firing internal-combustion engines for detecting or indicating knocks in internal combustion engines
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a kind of measurement apparatus of combustion knock, including：Cylinder pressure sensor, it is used for installed in being drilled with the engine of cylinder pressure sensor mounting hole, and cylinder pressure sensor is used for sensing the cylinder pressure in combustion chamber；Charge amplifier, it is used for for the charge signal that cylinder pressure sensor sensing is obtained being converted into voltage signal；Data collecting card, its voltage signal for being used for gathering charge amplifier output；And knock determiner, its cylinder pressure signal for being used for being collected by processing data capture card obtains pinking peak value PK, knock determiner is used for pinking peak value PK compared with presetting pinking threshold values TPK, when pinking peak value PK is then judged to pinking more than pinking threshold values TPK, when pinking peak value PK is then judged to not pinking less than pinking threshold values TPK.The measurement apparatus need to only install in-cylinder pressure sensor, without installing crankshaft position sensor, reduce the experimentation cost of engine research, development process, improve test efficiency.
Description
Technical field
The present invention relates to spark-ignition engine knock measurement field, more particularly to a kind of measurement apparatus of combustion knock.
Background technology
As Abgasgesetz is increasingly strict, for environmental protection, it is desirable to which gasoline cancels leading, meanwhile, with petroleum-based energy
Increasingly depleted triggers the lifting of fuel price.In order to improve the economy of spark-ignition engine fuel oil and improve the power of engine
Property, engine is often achieved the goal using compression ratio and increase ignition advance angle is improved.And occur this also increases engine
The tendency of pinking, slight pinking is conducive to improving the performance of engine, and strong pinking can then damage engine.Therefore, exist
During engine research, development, the limit value for controlling pinking is most important.When engine occurs pinking, in being followed by for in-cylinder pressure peak
High-frequency pressure to vibrate, pinking is stronger, the amplitude of this pressure vibration is bigger.Measuring the conventional method of pinking at present is
In-cylinder pressure is measured based on crank angle, knock window is determined according to crank angle, pressure vibration is obtained after high-pass filtering treatment
Amplitude, the intensity of pinking is judged further according to the vibration amplitude for obtaining.
But, the method for above measurement pinking needs to install cylinder pressure sensor and crankshaft position sensor simultaneously, bent axle position
Put sensor installation axiality requirement very high, and the frock that needs are connected with bent axle can just install engine, in actual work
In Cheng Yingyong, crankshaft position sensor is installed, exists and take many, installation difficulty, increase experimentation cost, it is impossible to installed on vehicle
The problems such as.
The information for being disclosed in the background section is merely intended to increase the understanding to general background of the invention, without answering
In being considered as recognizing or imply in any form that the information structure has been the prior art well known to persons skilled in the art.
The content of the invention
It is an object of the invention to provide a kind of measurement apparatus of combustion knock, in-cylinder pressure sensor only need to be installed,
Crankshaft position sensor need not be installed, the experimentation cost of engine research, development process is reduced, test efficiency is improved.
To achieve the above object, the invention provides a kind of measurement apparatus of combustion knock, including：Cylinder pressure sensor,
It is used for installed in being drilled with the engine of cylinder pressure sensor mounting hole, and cylinder pressure sensor is used for sensing the cylinder pressure in combustion chamber
Power；Charge amplifier, it is used for for the charge signal that cylinder pressure sensor sensing is obtained being converted into voltage signal；Data acquisition
Card, its voltage signal for being used for gathering charge amplifier output；And knock determiner, it is used for by processing data capture card
The cylinder pressure signal for collecting obtains pinking peak value PK, and knock determiner is used for pinking peak value PK and presetting pinking
Threshold values TPK compares, when pinking peak value PK is then judged to pinking more than pinking threshold values TPK, when pinking peak value PK is less than pinking valve
Value TPK is then judged to not pinking.
Preferably, it is bent that the cylinder pressure signal that knock determiner is collected according to data collecting card draws in-cylinder pressure
Line, the corresponding time t of maximum Pmax that knock determiner passes through the in-cylinder pressure curve acquisition in-cylinder pressure curve0, in t0Before
The corresponding time t of 80%Pmax1With in t0Corresponding time t of 40%Pmax afterwards2, t2- t1In-cylinder pressure curve in time period is
The knock window of combustion knock, knock determiner is buckled after line carries out high-pass filtering treatment to the cylinder in knock window and is taken definitely
Value, pinking peak value PK is the maximum in absolute value.
Preferably, knock determiner calculates detonation frequency according to the number of times that pinking occurs with the number of times of measurement, and pinking is sentenced
Determine to be judged to not pinking when detonation frequency is 0 by device, more than 0 be less than or equal to detonation frequency to be judged to when 10% by knock determiner
More than 10% be less than or equal to detonation frequency to be judged to moderate pinking, knock determiner when 30% by light knock, knock determiner
It is judged to severe knock when detonation frequency is more than into 30%.
Compared with prior art, the present invention has the advantages that：By design cylinder pressure sensor, charge amplifier,
Data collecting card and knock determiner, knock measurement is carried out based on time domain, without installing crankshaft position sensor, in engine
Having in R＆D process reduces experimentation cost, improves the advantage of test efficiency.
Brief description of the drawings
Fig. 1 is the principle schematic of the measurement apparatus of combustion knock of the invention；
Fig. 2 be combustion knock of the invention measurement apparatus in obtain knock window pressue-graph；
Fig. 3 is in-cylinder pressure curve map, high-pass filtering treatment in the measurement apparatus of combustion knock of the invention
Rear pressue-graph and the pressure curve after processing high-pass filtering take absolute value after pressue-graph.
Specific embodiment
Below in conjunction with the accompanying drawings, specific embodiment of the invention is described in detail, it is to be understood that guarantor of the invention
Shield scope is not limited by specific embodiment.
Explicitly indicated that unless otherwise other, otherwise in entire disclosure and claims, term " including " or its change
Change such as "comprising" or " including " etc. and will be understood to comprise stated element or part, and do not exclude other units
Part or other parts.
As shown in Figure 1 to Figure 3, the measurement apparatus of the combustion knock according to the specific embodiment of the invention, including cylinder pressure
Sensor 1, charge amplifier 2, data collecting card 3 and knock determiner 4, wherein cylinder pressure sensor 1 are drilled with for being arranged on
On the engine of cylinder pressure sensor mounting hole, cylinder pressure sensor 1 is used for sensing the cylinder pressure in combustion chamber, charge amplifier 2
Voltage signal is converted into for cylinder pressure sensor 1 is sensed into the charge signal for obtaining, data collecting card 3 is put for gathering electric charge
The voltage signal of the big output of device 2, knock determiner 4 is used for the cylinder pressure signal collected by processing data capture card 3
Pinking peak value PK is obtained, knock determiner 4 is used for pinking peak value PK compared with presetting pinking threshold values TPK, works as pinking
Peak value PK is then judged to pinking more than pinking threshold values TPK, when pinking peak value PK is then judged to not pinking less than pinking threshold values TPK.
Used as a kind of preferred embodiment, knock determiner 4 is painted according to the cylinder pressure signal that data collecting card 3 is collected
In-cylinder pressure curve 31 (participation Fig. 3) processed, the maximum that knock determiner 4 passes through the in-cylinder pressure curve acquisition in-cylinder pressure curve
The corresponding time t0s of value Pmax, the corresponding time t1 of the 80%Pmax and corresponding time t2 of 40%Pmax after t0 before t0,
In-cylinder pressure curve in the t2-t1 time periods is the knock window (participation Fig. 2) of combustion knock, and knock determiner 4 is to pinking
Cylinder in window line of buckling taken absolute value after high-pass filtering treatment and (Fig. 3 is participated in, at the high-pass filtering of in-cylinder pressure curve 31
Pressure curve 32 after reason, the pressure curve 33 after being taken absolute value to pressure curve 32), pinking peak value PK be absolute value in most
Big value.
Used as a kind of preferred embodiment, knock determiner 4 calculates quick-fried according to the number of times that pinking occurs with the number of times of measurement
Shake frequency, knock determiner 4 is judged to not pinking when being 0 by detonation frequency, and more than 0 be less than detonation frequency by knock determiner 4
In being judged to that more than 10% be less than or equal to detonation frequency to be judged to when 30% by light knock, knock determiner 4 during equal to 10%
Degree pinking, knock determiner 4 is judged to severe knock when detonation frequency is more than into 30%.
In such scheme, the measurement apparatus of combustion knock are based on the cylinder pressure signal of time domain, according to in-cylinder pressure
Peak determines knock window, and data processing is carried out to the pressure curve in knock window by knock determiner, then by pinking
Determinant judges the intensity of pinking.Compared with existing conventional method, the measurement of the combustion knock of the present embodiment only needs to install
In-cylinder pressure sensor, without installing crankshaft position sensor, reduces the experimentation cost of engine research, development process, improves experiment effect
Rate.
To sum up, the measurement apparatus of the combustion knock of the present embodiment, by designing cylinder pressure sensor, charge amplifier, number
According to capture card and knock determiner, knock measurement is carried out based on time domain, without installing crankshaft position sensor, ground in engine
Having during hair reduces experimentation cost, improves the advantage of test efficiency.
The foregoing description to specific illustrative embodiment of the invention be in order to illustrate and illustration purpose.These descriptions
It is not wishing to limit the invention to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can be much changed
And change.The purpose of selecting and describing the exemplary embodiment is that explaining that certain principles of the invention and its reality should
With so that those skilled in the art can realize and using a variety of exemplaries of the invention and
A variety of selections and change.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (3)
1. a kind of measurement apparatus of combustion knock, it is characterised in that including：
Cylinder pressure sensor, it is used for installed in being drilled with the engine of cylinder pressure sensor mounting hole, and the cylinder pressure sensor is used for
Cylinder pressure in sensing combustion chamber；
Charge amplifier, it is used for for the charge signal that cylinder pressure sensor sensing is obtained being converted into voltage signal；
Data collecting card, its voltage signal for being used for gathering the charge amplifier output；And
Knock determiner, its cylinder pressure signal for being used for being collected by processing the data collecting card obtains pinking peak value
PK, the knock determiner is used for the pinking peak value PK compared with presetting pinking threshold values TPK, when the pinking peak
Value PK is then judged to pinking more than the pinking threshold values TPK, when the pinking peak value PK then judges less than the pinking threshold values TPK
For not pinking.
2. measurement apparatus of combustion knock according to claim 1, it is characterised in that the knock determiner is according to institute
The cylinder pressure signal drafting in-cylinder pressure curve that data collecting card is collected is stated, the knock determiner passes through the cylinder internal pressure
Force curve obtains the corresponding time t of maximum Pmax of in-cylinder pressure curve0, in t0The corresponding time t of preceding 80%Pmax1With
t0Corresponding time t of 40%Pmax afterwards2, t2- t1In-cylinder pressure curve in time period is the knock window of combustion knock, institute
State knock determiner and the cylinder in the knock window is buckled after line carries out high-pass filtering treatment and take absolute value, the pinking peak value
PK is the maximum in the absolute value.
3. measurement apparatus of combustion knock according to claim 2, it is characterised in that the knock determiner is according to quick-fried
Shake the number of times for occurring and calculate detonation frequency with the number of times of measurement, the knock determiner judges when being 0 by the detonation frequency
It is not pinking, more than 0 be less than or equal to the detonation frequency to be judged to light knock when 10% by the knock determiner, described quick-fried
Shake determinant by the detonation frequency more than 10% less than or equal to 30% when be judged to moderate pinking, the knock determiner is by institute
It is judged to severe knock when stating detonation frequency more than 30%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611120703.3A CN106768613A (en) | 2016-12-08 | 2016-12-08 | The measurement apparatus of combustion knock |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611120703.3A CN106768613A (en) | 2016-12-08 | 2016-12-08 | The measurement apparatus of combustion knock |
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| CN106768613A true CN106768613A (en) | 2017-05-31 |
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| CN201611120703.3A Pending CN106768613A (en) | 2016-12-08 | 2016-12-08 | The measurement apparatus of combustion knock |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956009A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of piezoelectric pressure indicator calibration method and device |
| CN110487478A (en) * | 2018-05-14 | 2019-11-22 | 日立汽车系统（中国）有限公司 | Combustion knock detection method, device, equipment and its storage medium based on decision tree |
| CN110678638A (en) * | 2017-10-27 | 2020-01-10 | 三菱重工发动机和增压器株式会社 | Knock detection method and knock detection device |
| CN110878718A (en) * | 2019-12-31 | 2020-03-13 | 广西玉柴机器股份有限公司 | Detonation control method of natural gas engine |
| CN113514146A (en) * | 2021-04-16 | 2021-10-19 | 中国人民解放军战略支援部队航天工程大学 | Induction plug capable of simultaneously measuring detonation combustion ion signal and combustion light signal |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110678638A (en) * | 2017-10-27 | 2020-01-10 | 三菱重工发动机和增压器株式会社 | Knock detection method and knock detection device |
| CN110487478A (en) * | 2018-05-14 | 2019-11-22 | 日立汽车系统（中国）有限公司 | Combustion knock detection method, device, equipment and its storage medium based on decision tree |
| CN108956009A (en) * | 2018-09-30 | 2018-12-07 | 广西玉柴机器股份有限公司 | A kind of piezoelectric pressure indicator calibration method and device |
| CN108956009B (en) * | 2018-09-30 | 2023-09-19 | 广西玉柴机器股份有限公司 | Piezoelectric pressure sensor calibration method and device |
| CN110878718A (en) * | 2019-12-31 | 2020-03-13 | 广西玉柴机器股份有限公司 | Detonation control method of natural gas engine |
| CN113514146A (en) * | 2021-04-16 | 2021-10-19 | 中国人民解放军战略支援部队航天工程大学 | Induction plug capable of simultaneously measuring detonation combustion ion signal and combustion light signal |
| CN113514146B (en) * | 2021-04-16 | 2023-09-26 | 中国人民解放军战略支援部队航天工程大学 | Inductive plug capable of measuring detonation combustion ion signal and combustion light signal simultaneously |
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Application publication date: 20170531 |