CN108918588A - The method of simulated high-pressure common rail diesel engine combustion state - Google Patents
The method of simulated high-pressure common rail diesel engine combustion state Download PDFInfo
- Publication number
- CN108918588A CN108918588A CN201810285287.5A CN201810285287A CN108918588A CN 108918588 A CN108918588 A CN 108918588A CN 201810285287 A CN201810285287 A CN 201810285287A CN 108918588 A CN108918588 A CN 108918588A
- Authority
- CN
- China
- Prior art keywords
- combustion
- diesel engine
- common rail
- pressure common
- mathematical model
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
Abstract
The invention discloses a kind of methods of simulated high-pressure common rail diesel engine combustion state, include the following steps：Step 1：Using double webers of MATHEMATICAL MODEL OF COMBUSTIONs, and double webers of MATHEMATICAL MODEL OF COMBUSTIONs include main combustion stage burning mathematical model and tail combustion stage burning mathematical model；Step 2：Repeated combustion test is carried out under the conditions of nominal situation to Design of High Pressure Common Rail Diesel Engine, collects following test data：Crank angleScore xb and total thermal discharge Qg have been fired, and has drawn out exotherm figure；Step 3：Exotherm figure is analyzed and according to known crank angleIt has fired score xb and total thermal discharge Qg and has been fitted exotherm figure to exotherm figure according to double webers of MATHEMATICAL MODEL OF COMBUSTIONs, solved Qg1 and Qg2, obtain matched curve figure.Whereby, the method for simulated high-pressure common rail diesel engine combustion state of the invention, can be obviously improved the degree of agreement of model and experiment value, more reasonable control parameter can be set, to preferably carry out the exploitation of controller.
Description
Technical field
The present invention relates to a kind of diesel combustion exothermic technology field, in particular to a kind of simulated high-pressure common rail diesel engine combustion
The method of burning state.
Background technique
Diesel engine controller (ECU) is equivalent to the brain of diesel engine electric control system, by the input of sensor signal, passes through
Controller operation will execute signal and export to each executing agency, to guarantee that diesel engine correctly works.Controller exploitation, passes
On system use several hundred thousands of a tables, establish interpolation mathematical model using a large amount of statistical data, using input signal as input,
The execution signal of output is obtained by interpolation.
With the development of control technology, it is based particularly on advantage of the controller development technique of model in controller exploitation
It is more and more obvious, the exploitation of diesel engines at present controller also tends to the technology based on model and developed.Diesel oil based on model
Machine controller exploitation, exactly models diesel engine subsystems by some mathematical formulaes with physical significance, and
It is no longer the straightforward procedure conventionally by table interpolation.At this time, subsystems or be directly object by the system
The mathematical formulae or be exactly the semi-empirical mathematical model with physical significance that reason evaluation on meaning inferential comes out.
In controller, most crucial system is exactly combustion system.Since the exothermic process of diesel engine is extremely complex, can not make
It is derived, therefore is traditionally more likely to using the semiempirical formula model with physical significance with mathematical formulae, wherein
Most-often used on diesel engine is exactly double weber law of heat release models.Double webers of law of heat release models, diesel combustion is divided into
It in two stages of pre-mixing combustion and diffusion combustion, is indicated respectively with two Weber functions.
In traditional mechanical pump epoch, since injection pressure is relatively low, the pre-mixing stage duration is long, and exothermic process is bright
It is aobvious, indicate that Combustion Release Heat is more conform with actual conditions using double Weber functions.But bavin is sprayed for present high-pressure common rail
Oil machine, injection pressure is big, rate is high, and atomization is good, and premixed combustion phase is no longer so obvious, it might even be possible to ignore, this
When double Weber function applicability it is just no longer so good.
As shown in Figure 1 to Figure 2, Fig. 1 is the curve graph of the Combustion Release Heat of certain existing mechanical pump diesel engine；Fig. 2 is existing
There is the curve graph of the Combustion Release Heat of certain Design of High Pressure Common Rail Diesel Engine.The Combustion Release Heat curve of mechanical pump diesel engine is presented two
A wave crest respectively indicates pre-mixing combustion and two processes of diffusion combustion；On Design of High Pressure Common Rail Diesel Engine, pre-mixing combustion it is small
Peak can't see, and entire burning is with regard to only one peak, if only using traditional double weber combustion models to be fitted the heat release
Rule can not then match with test value well.
As shown in figure 3, Fig. 3 is the existing curve graph for being fitted Design of High Pressure Common Rail Diesel Engine law of heat release by double Weber functions.
In Fig. 3, the heat release rate profile at burning initial stage can be made more identical using double Weber functions, burning initial stage have one it is very unobvious
Premixed combustion process, can be embodied when using double Weber functions.But in burning latter stage, double Weber functions and test
The error of value is very big, illustrates not being suitable for current Design of High Pressure Common Rail Diesel Engine using traditional double weber combustion models at this time.
Design of High Pressure Common Rail Diesel Engine burning is put in view of existing double weber combustion models based on pre-mixing combustion and diffusion combustion stage
Hot fitting effect is poor, the defect not being inconsistent with Design of High Pressure Common Rail Diesel Engine Actual combustion law of heat release.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The purpose of the present invention is to provide a kind of methods of simulated high-pressure common rail diesel engine combustion state, to overcome existing
Double weber combustion models based on pre-mixing combustion and diffusion combustion stage in technology, which are fitted Design of High Pressure Common Rail Diesel Engine heat release, imitates
The shortcomings that fruit is poor, is not inconsistent with Design of High Pressure Common Rail Diesel Engine Actual combustion law of heat release.
To achieve the above object, the present invention provides a kind of methods of simulated high-pressure common rail diesel engine combustion state, including
Following steps：Step 1：Using double webers of MATHEMATICAL MODEL OF COMBUSTIONs, and double webers of MATHEMATICAL MODEL OF COMBUSTIONs include main combustion stage burning number
It learns model and tail fires stage burning mathematical model；Step 2：Design of High Pressure Common Rail Diesel Engine is carried out under the conditions of nominal situation repeatedly
Combustion test collects following test data：Crank angleScore xb and total thermal discharge Qg have been fired, and has drawn out exotherm
Figure；；Step 3：Exotherm figure is analyzed and according to known crank angleScore xb and total thermal discharge Qg are fired
Exotherm figure is fitted exotherm figure according to double webers of MATHEMATICAL MODEL OF COMBUSTIONs, solves Qg1 and Qg2, is intended
Close curve graph；
C1 indicates that the combustion coefficient in main combustion stage, c2 indicate that the combustion coefficient in tail combustion stage, Qg1 indicate the main combustion stage in formula
Heat release value, Qg2 indicate tail combustion the stage heat release value, m indicate combustion quality index,Z indicates combustion duration,It indicates
Burn initial angle；
Step 4：The accounting for adjusting Qg1 and Qg2 in matched curve figure, calculates separately Qg1 and Qg2 by Eviews software
Different accountings under the conditions of matched curve figure and exotherm figure degree of fitting, when the value of degree of fitting R be greater than 0.99 when, just determine
The parameter of matched curve figure obtains the double weber MATHEMATICAL MODEL OF COMBUSTIONs of Design of High Pressure Common Rail Diesel Engine；Step 5：Obtained double webers are fired
The formula and the parameters in formula for burning mathematical model, which are input in diesel engine controller, just have been obtained based on main combustion and tail combustion
The diesel engine controller of double webers of MATHEMATICAL MODEL OF COMBUSTIONs.
Preferably, in above-mentioned technical proposal, degree of fitting passes through residual sum of square inspection, Chi-square Test or linear regression test
One of method is calculated.
Preferably, in above-mentioned technical proposal, the heat release value Qg1 in main combustion stage accounts for the 90%-95% of total thermal discharge, and tail fires rank
The heat release value Qg2 of section accounts for the 5%-10% of total thermal discharge, and the heat release value Qg2 of the heat release value Qg1 in main combustion stage and tail combustion stage
And be total thermal discharge Qg.
Preferably, in above-mentioned technical proposal, combustion quality exponent m is equal to 2.0.
Preferably, in above-mentioned technical proposal, c1=c2=6.9.
Preferably, in above-mentioned technical proposal, burn initial angleIt is taken as the 1% corresponding crank angle of the score of combustion.
Compared with prior art, the present invention has the advantages that：Simulated high-pressure common rail diesel engine burning of the invention
The method of state can be obviously improved the degree of agreement of model and test value, and more reasonable control parameter can be set, thus
Preferably carry out the exploitation of controller.
Detailed description of the invention
Fig. 1 is the curve graph of the Combustion Release Heat of certain existing mechanical pump diesel engine.
Fig. 2 is the curve graph of the Combustion Release Heat of certain existing Design of High Pressure Common Rail Diesel Engine.
Fig. 3 is the existing curve graph that Design of High Pressure Common Rail Diesel Engine law of heat release is fitted by double Weber functions.
Fig. 4 is double Weber functions fitting high pressure of the method for simulated high-pressure common rail diesel engine combustion state according to the present invention
The curve graph of common rail diesel engine law of heat release.
Fig. 5 is that the tail in the method for simulated high-pressure common rail diesel engine combustion state of the invention according to the present invention lights the beginning
The graph of relation at angle and main combustion.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
Unless otherwise explicitly stated, otherwise in entire disclosure and claims, term " includes " or its change
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other members
Part or other component parts.
As shown in Figures 1 to 5, Fig. 4 is the double of the method for simulated high-pressure common rail diesel engine combustion state according to the present invention
Weber function is fitted the curve graph of Design of High Pressure Common Rail Diesel Engine law of heat release, and Fig. 5 is simulated high-pressure of the invention according to the present invention
The graph of relation of tail combustion initial angle and main combustion in the method for common rail diesel engine combustion state.
The method of a kind of simulated high-pressure common rail diesel engine combustion state of specific embodiment according to the present invention, including it is as follows
Step：Step 1：Using double webers of MATHEMATICAL MODEL OF COMBUSTIONs, and double webers of MATHEMATICAL MODEL OF COMBUSTIONs include main combustion stage burning mathematical modulo
Type and tail fire stage burning mathematical model；Step 2：Repeated combustion is carried out under the conditions of nominal situation to Design of High Pressure Common Rail Diesel Engine
Test, collects following test data：Crank angleScore xb and total thermal discharge Qg have been fired, and has drawn out exotherm figure；Step
Rapid three：Exotherm figure is analyzed and according to known crank angleScore xb and total thermal discharge Qg have been fired by heat release
Curve graph is fitted exotherm figure according to double webers of MATHEMATICAL MODEL OF COMBUSTIONs, solves Qg1 and Qg2, obtains matched curve
Figure；
C1 indicates that the combustion coefficient in main combustion stage, c2 indicate that the combustion coefficient in tail combustion stage, Qg1 indicate the main combustion stage in formula
Heat release value, Qg2 indicate tail combustion the stage heat release value, m indicate combustion quality index,Z indicates combustion duration,It indicates
Burn initial angle；
Step 4：The accounting for adjusting Qg1 and Qg2 in matched curve figure, calculates separately Qg1 and Qg2 by Eviews software
Different accountings under the conditions of matched curve figure and exotherm figure degree of fitting, when the value of degree of fitting R be greater than 0.99 when, just determine
The parameter of matched curve figure obtains the double weber MATHEMATICAL MODEL OF COMBUSTIONs of Design of High Pressure Common Rail Diesel Engine；Step 5：Obtained double webers are fired
The formula and the parameters in formula for burning mathematical model, which are input in diesel engine controller, just have been obtained based on main combustion and tail combustion
The diesel engine controller of double webers of MATHEMATICAL MODEL OF COMBUSTIONs.
Preferably, degree of fitting examined by residual sum of square, one of Chi-square Test or linear regression test method into
Row calculates.
Preferably, the heat release value Qg1 in main combustion stage accounts for the 90%-95% of total thermal discharge, and the heat release value Qg2 in tail combustion stage is accounted for
The 5%-10% of total thermal discharge, and the heat release value Qg1 in main combustion stage and the heat release value in tail combustion stage Qg2's and be total thermal discharge
Qg。
Preferably, combustion quality exponent m is equal to 2.0；C1=c2=6.9；Burn initial angleIt is taken as 1% combustion point
The corresponding crank angle of number.
In conclusion refering to shown in Fig. 4 to Fig. 5, tail combustion substantially the main combustion stage close at the end of (burning completion 90%-
95%) just start, meet the physical significance of tail combustion：After main fuel burning is fast, the uncombusted fuel concentration in part is lower,
The slow sustained fire in the environment of high temperature.
In short, the method for simulated high-pressure common rail diesel engine combustion state of the invention, has the advantages that：
1, combustion model proposed by the present invention fires two Weber functions with tail by main combustion and constitutes, and respectively indicates the master of diesel engine
Combustion heat release process and later period slow sustained combustion process are wanted, by fitting, new combustion model can be good at test value
It coincide；And combustion model proposed by the present invention has specific physical significance：After wanting fuel combustion fast, part is uncombusted
Fuel concentration it is lower, the slow sustained fire in the environment of high temperature；Tail combustion substantially the main combustion stage close at the end of just open
Begin, meets the physical significance of tail combustion；
2, double weber combustion models proposed by the present invention in the prior art be based on pre-mixing combustion and diffusion combustion stage
Double weber combustion model parameters it is consistent, do not need additionally to increase parameter on the basis of original diesel engine control system software,
Exploitation controller can be carried out on original basis of software, does not influence the duration, can directly be sent out using original Control System Software,
Change control bottom most software is not needed, its implementation is simple, quick, and difficulty is lower；
3, the method for simulated high-pressure common rail diesel engine combustion state of the invention, it is real by being carried out to Design of High Pressure Common Rail Diesel Engine
Test the crank angle for obtaining double weber MATHEMATICAL MODEL OF COMBUSTIONsThe parameters such as score xb and total thermal discharge Qg have been fired, experiment parameter is passed through
It is fitted curve, so that the confidence level of the Reliability ratio theoretical calculation of matched curve is higher, and by the curve and reality of fitting
Obtained exotherm figure is tested, matched curve is advanced optimized, so that double webers of MATHEMATICAL MODEL OF COMBUSTIONs are more in line with high pressure and are total to
The combustion heat release situation of rail diesel engine；
4, double weber combustion models provided by the invention, can in the degree of agreement that can be obviously improved model and test value
More reasonable control parameter is arranged, to preferably carry out the exploitation of controller.
The aforementioned description to specific exemplary embodiment of the invention is 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 the above instruction, can much be changed
And variation.The purpose of selecting and describing the exemplary embodiment is that explaining specific principle of the invention and its actually answering
With so that those skilled in the art can be realized and utilize a variety of different exemplary implementation schemes of the invention and
Various chooses and changes.The scope of the present invention is intended to be limited by claims and its equivalents.
Claims (6)
1. a kind of method of simulated high-pressure common rail diesel engine combustion state, which is characterized in that include the following steps：
Step 1：Using double webers of MATHEMATICAL MODEL OF COMBUSTIONs, and double weber MATHEMATICAL MODEL OF COMBUSTIONs include main combustion stage burning number
It learns model and tail fires stage burning mathematical model；
Step 2：Repeated combustion test is carried out under the conditions of nominal situation to Design of High Pressure Common Rail Diesel Engine, collects following test data：
Crank angleScore xb and total thermal discharge Qg have been fired, and has drawn out exotherm figure；
Step 3：The exotherm figure is analyzed and according to known crank angleScore xb and total thermal discharge are fired
Exotherm figure is fitted exotherm figure according to double webers of MATHEMATICAL MODEL OF COMBUSTIONs by Qg, solves Qg1 and Qg2, obtains
Matched curve figure；
C1 indicates that the combustion coefficient in main combustion stage, c2 indicate that the combustion coefficient in tail combustion stage, Qg1 indicate putting for main combustion stage in formula
Calorific value, Qg2 indicate that the heat release value in tail combustion stage, m indicate combustion quality index, Indicate combustion duration,Indicate burning
Initial angle；
Step 4：The accounting for adjusting Qg1 and Qg2 in matched curve figure, calculates separately Qg1 and Qg2 not by Eviews software
Fitting is just determined when the value of degree of fitting R is greater than 0.99 with the degree of fitting of matched curve figure under the conditions of accounting and exotherm figure
The parameter of curve graph obtains the double weber MATHEMATICAL MODEL OF COMBUSTIONs of Design of High Pressure Common Rail Diesel Engine；
Step 5：Parameters in the formula and formula of obtained double weber MATHEMATICAL MODEL OF COMBUSTIONs are input to Diesel Engine Control
Just the diesel engine controller that double weber MATHEMATICAL MODEL OF COMBUSTIONs are fired based on main combustion and tail has been obtained in device.
2. the method for simulated high-pressure common rail diesel engine combustion state according to claim 1, which is characterized in that the fitting
Degree is calculated by one of residual sum of square inspection, Chi-square Test or linear regression test method.
3. the method for simulated high-pressure common rail diesel engine combustion state according to claim 1, which is characterized in that the main combustion
The heat release value Qg1 in stage accounts for the 90%-95% of total thermal discharge, the heat release value Qg2 in the tail combustion stage accounts for the 5%- of total thermal discharge
10%, and the heat release value Qg1 in the main combustion stage and the tail combustion stage heat release value Qg2's and be total thermal discharge Qg.
4. the method for simulated high-pressure common rail diesel engine combustion state according to claim 1, which is characterized in that the burning
Qualitative index m is equal to 2.0.
5. the method for simulated high-pressure common rail diesel engine combustion state according to claim 1, which is characterized in that the c1=
C2=6.9.
6. the method for simulated high-pressure common rail diesel engine combustion state according to claim 1, which is characterized in that the burning
Initial angleIt is taken as the 1% corresponding crank angle of the score of combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810285287.5A CN108918588B (en) | 2018-04-02 | 2018-04-02 | Method for simulating combustion state of high-pressure common-rail diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810285287.5A CN108918588B (en) | 2018-04-02 | 2018-04-02 | Method for simulating combustion state of high-pressure common-rail diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108918588A true CN108918588A (en) | 2018-11-30 |
| CN108918588B CN108918588B (en) | 2021-06-01 |
Family
ID=64402959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810285287.5A Active CN108918588B (en) | 2018-04-02 | 2018-04-02 | Method for simulating combustion state of high-pressure common-rail diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108918588B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007126997A (en) * | 2005-11-01 | 2007-05-24 | Toyota Motor Corp | Simulation method and simulation device for heat generation in cylinder |
| JP2007248119A (en) * | 2006-03-14 | 2007-09-27 | Toyota Motor Corp | Method for determining wiebe function parameter and device for presuming heat release rate of internal combustion engine |
| JP2014025380A (en) * | 2012-07-25 | 2014-02-06 | Toyota Motor Corp | Heat generation rate waveform making device of internal combustion engine and combustion state diagnostic apparatus |
| CN106548029A (en) * | 2016-11-01 | 2017-03-29 | 哈尔滨工程大学 | The determination method of the regular empirical coefficient of weber burning |
| CN106908248A (en) * | 2017-03-22 | 2017-06-30 | 哈尔滨工程大学 | The double regular empirical parameter automatic calibrating methods of weber burning of self-identifying list |
| CN107092723A (en) * | 2017-03-22 | 2017-08-25 | 哈尔滨工程大学 | The regular empirical parameter automatic calibrating method of double webers of burnings |
-
2018
- 2018-04-02 CN CN201810285287.5A patent/CN108918588B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007126997A (en) * | 2005-11-01 | 2007-05-24 | Toyota Motor Corp | Simulation method and simulation device for heat generation in cylinder |
| JP2007248119A (en) * | 2006-03-14 | 2007-09-27 | Toyota Motor Corp | Method for determining wiebe function parameter and device for presuming heat release rate of internal combustion engine |
| JP2014025380A (en) * | 2012-07-25 | 2014-02-06 | Toyota Motor Corp | Heat generation rate waveform making device of internal combustion engine and combustion state diagnostic apparatus |
| CN106548029A (en) * | 2016-11-01 | 2017-03-29 | 哈尔滨工程大学 | The determination method of the regular empirical coefficient of weber burning |
| CN106908248A (en) * | 2017-03-22 | 2017-06-30 | 哈尔滨工程大学 | The double regular empirical parameter automatic calibrating methods of weber burning of self-identifying list |
| CN107092723A (en) * | 2017-03-22 | 2017-08-25 | 哈尔滨工程大学 | The regular empirical parameter automatic calibrating method of double webers of burnings |
Non-Patent Citations (2)
| Title |
|---|
| 刘威: "某型柴油机性能仿真与试验研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
| 刘峰: "柴油机高压共轨燃油喷射系统仿真计算研究", 《中国优秀硕士学位论文全文数据库 工程科技II辑》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108918588B (en) | 2021-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2011106334A (en) | Method of estimating heat release rate of engine using wiebe function model | |
| Reyes et al. | Study of the cycle-to-cycle variations of an internal combustion engine fuelled with natural gas/hydrogen blends from the diagnosis of combustion pressure | |
| Payri et al. | Rate of injection modelling for gasoline direct injectors | |
| Piano et al. | Assessment of the predictive capabilities of a combustion model for a modern common rail automotive diesel engine | |
| De Cuyper et al. | Heat transfer in premixed spark ignition engines part II: Systematic analysis of the heat transfer phenomena | |
| Jiang et al. | Implementation of model-based calibration for a gasoline engine | |
| CN108918588A (en) | The method of simulated high-pressure common rail diesel engine combustion state | |
| CN113191071B (en) | Method for virtually calibrating engine model and related device thereof | |
| CN106687676A (en) | Method for starting up a dual fuel engine | |
| US9149776B2 (en) | Systems and methods for liquid fuel modeling | |
| WO2015130252A1 (en) | An online optimization method for engine calibration | |
| CN116562190A (en) | Natural gas engine combustion optimization method by cooperative vortex | |
| Brusa et al. | Development and Validation of a Control-Oriented Analytic Engine Simulator | |
| ATE542991T1 (en) | METHOD FOR ESTIMATING RESIDUAL EXHAUST GAS CONCENTRATION IN AN ENGINE WITH VARIABLE CAM PHASE | |
| CN112883653B (en) | Artificial intelligence-based modeling method for real-time engine model | |
| CN106960092B (en) | Automatic calibration method for Weber combustion rule empirical parameters | |
| CN113050609A (en) | ECU (electronic control Unit) testing method and device | |
| CN112282949A (en) | Method and device for optimizing control parameters of ignition working condition of electric control gasoline engine and vehicle | |
| CN216411177U (en) | Fuel octane number measuring device suitable for low-pressure environment | |
| Nielson et al. | A Study of the Effect of Electronic Fuel Injection on the CFR F5 Cetane Rating Engine | |
| CN114034810B (en) | Fuel octane number measuring device suitable for low-pressure environment | |
| CN109443775A (en) | Simulate the test method and device of hot WHTC circulation in the cold and hot WHTC circulation of diesel engine | |
| Yuan et al. | Modeling of trace knock in a modern SI engine fuelled by ethanol/gasoline blends | |
| CN112182744B (en) | EGR rate prediction method, device, equipment and medium | |
| CN113432149B (en) | Test verification method and system for fuel nozzle modification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |