CN103104359A - Analog engine pressurization regulating signal generating method - Google Patents

Analog engine pressurization regulating signal generating method Download PDF

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Publication number
CN103104359A
CN103104359A CN2013100439739A CN201310043973A CN103104359A CN 103104359 A CN103104359 A CN 103104359A CN 2013100439739 A CN2013100439739 A CN 2013100439739A CN 201310043973 A CN201310043973 A CN 201310043973A CN 103104359 A CN103104359 A CN 103104359A
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module
boost pressure
actuator position
throttle
pressure regulation
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CN103104359B (en
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刘兴华
糜思富
张海民
许家全
赵锐娜
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Beijing Institute of Technology BIT
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Beijing Institute of Technology BIT
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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    • Y02T10/12—Improving ICE efficiencies

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Abstract

The invention relates to an analog engine pressurization regulating signal generating method. The method includes the following steps: (1) collecting rotating speed, accelerator signals, pressurization regulating actuator position signals of an analog engine and carrying out filtering and analog to digital (A/D) conversion; (2) carrying out two-dimensional lookup table interpolation according to the rotating speed and an accelerator, and obtaining theoretical pressurizing pressure of the current rotating speed and the accelerator; (3) carrying out normalization processing on digital quantity of the pressurization regulating actuator position signals; (4) carrying out one-dimensional lookup table interpolation according to pressurization regulating actuator relative position signals, and obtaining impact factors of a pressurization regulating actuator on the pressurizing pressure under a current state; (5) using the theoretical pressurizing pressure before regulation to be multiplied by the impact factors for obtaining actual pressurizing pressure; and (6) using a controller area network (CAN) bus communication module to output the signals of the rotating speed, the accelerator and the actual pressurizing pressure. The method is accurate in generated signals and good in generality, and is effectively applied to a testing system of an engine pressurization regulating control unit.

Description

A kind of simulated engine boost pressure regulation signal generating method
Technical field
The present invention relates to electric-control motor signal imitation and produce the ox technical field, relate in particular to a kind of simulated engine boost pressure regulation signal generating method.
Background technique
In the research of Modern Automobile Engine management system, complicated function requirement and strict laws and regulations requirement makes the development process of vehicle electronic control unit ECU (Electronic Control Unit) software and hardware become increasingly complex day by day, therefore needs the strict development approach efficiently of a cover to guarantee the quality of Product-level ECU.For efficient and the precision that improves product development, automobile electronic system exploitation has proposed the modernization development process-V model development flow process based on model, and this flow process guarantees that the developer can in time be verified in each step on stream.Before launch, need to carry out to ECU the test under the test of Comprehensive, especially fault and extreme condition, use actual control object to test, be difficult to realize real complex situations, and realize that cost is high, the construction cycle is long.For solving this difficult problem, propose in V model to adopt hardware in the development approach of ring (Hardware In-the-Loop) emulation testing, its essence is the test system that a cover and electronic controller truly are connected, for detection of the most of functional fault of automobile electronic controller.Due to the development and maturation of bussing technique, automobile is realized distributed coordination function by network now.And the interaction effect between each ECU increases, such as shared sensor, computing information and final controlling element etc.Simultaneously, the multiple bus system of network support (CAN, LIN, MOST, FlexRay).
Need boost pressure is controlled in real time in some motor with turbosupercharger, thereby installed the opening angle that the boost pressure regulation final controlling element is controlled exhaust gas by-pass valve additional.In order to reduce to start the complexity of owner ECU, improve reliability, often with boost pressure regulation final controlling element control module as an independent boost pressure regulation control unit, communicate by letter with mobilizing owner ECU by the CAN bus.In order to realize closed loop control, in the HIL test, rotating speed, load, plenum pressure signal must be sent to the boost pressure regulation control unit, the boost pressure regulation control unit rationally controls according to signal and corresponding control strategy the opening angle that the boost pressure regulation final controlling element is regulated exhaust gas by-pass valve.In this boost pressure regulation control unit HIL test, need to simulate engine signal, in needed CAN bus signals, the degree of association of boost pressure and engine speed, throttle signal is maximum, and along with the action of boost pressure regulation final controlling element is also changing, so the simulation difficulty is larger.Do not have at present Patents to be used to simulate the product ox of motor boost pressure regulation signal under the CAN bus communication.
Summary of the invention
The invention provides a kind of simulated engine boost pressure regulation signal generating method, current rotating speed, throttle, actuator position analogue signal are carried out A/D to be changed, and according to the theoretical boost pressure that not affected by boost pressure regulation and boost pressure factor of influence corresponding to boost pressure regulation final controlling element current location, multiplying each other obtains actual supercharge pressure, at last rotating speed, throttle, actual supercharge pressure is exported by the CAN bus communication.
The objective of the invention is to be achieved through the following technical solutions:
This boost pressure regulation signal produces module that Niu Fangfa uses and comprises that the rotating speed analogue signal is produced the ox module, the throttle analogue signal is produced ox module, boost pressure regulation actuator position signal generator module, analog-digital converter, two-dimentional table look-up module, normalization module, logical operation module and CAN bus communication module; Its medium speed analogue signal generating module, throttle analogue signal are produced the ox module, boost pressure regulation actuator position signal generator module all is connected with analog-digital converter, analog-digital converter all is connected with two-dimentional table look-up module, normalization module and CAN bus communication module, two dimension table look-up module, normalization module all are connected with logical operation module, and logical operation module is connected with CAN bus communication module;
Preset the boost pressure two-dimensional data table in two-dimentional table look-up module, variable is rotating speed and throttle in this table, and corresponding boost pressures both;
Preset boost pressure regulation factor of influence one-dimensional data table in the normalization module, wherein variable is normalized actuator position amount, and the factor of influence corresponding with normalized actuator position amount; The obtain manner of described one-dimensional data table is: when normalized actuator position amount is 0, factor of influence is 1, when normalized actuator position amount is 1, factor of influence is 0, when normalized actuator position amount was x, the boost pressure of measuring this moment was the maximum pressure boost of 0 o'clock divided by normalized actuator position amount, the factor of influence when being normalized actuator position amount and being x, the like, obtain boost pressure regulation factor of influence one-dimensional data table;
Step 1, the rotating speed analogue signal is produced after ox module, throttle analogue signal produce engine speed, throttle, boost pressure regulation actuator position signal that ox module, boost pressure regulation actuator position signal generator module produce ox and send into analog-digital converter and carry out filtering and A/D conversion, output speed digital signal, throttle digital signal are to two-dimentional table look-up module and CAN bus communication module, and output boost pressure regulation final controlling element digital signal is to the normalization module;
Step 2, two-dimentional table look-up module carry out according to the size of the rotating speed digital signal that receives and throttle digital signal that two dimension is tabled look-up, interpolation, try to achieve the boost pressure under current described rotating speed, throttle, the theoretical boost pressure before namely not regulating is exported to logical operation module;
The digital quantity of the boost pressure regulation final controlling element digital signal that the docking of step 3, normalization module is received carries out normalized and obtains current normalized actuator position amount, and gets the corresponding factor of influence of current normalized actuator position amount and export to logical operation module according to presetting boost pressure regulation factor of influence one-dimensional data table;
The theoretical boost pressure that step 4, logical operation module will receive before not regulating and the corresponding factor of influence of current normalized actuator position amount multiply each other and obtain actual supercharge pressure and export to CAN bus communication module;
Step 5, CAN bus communication module send to the actual supercharge pressure of rotating speed, throttle and the step 4 of the step 1 that receives on the CAN bus.
Beneficial effect of the present invention:
Beneficial effect of the present invention is mainly manifested in:
1. hardware configuration is simple: just can realize simulation by simple device, and economical and practical;
2. versatility is good: analogue signal by the output of CAN bus, is not only applicable to the testing requirement of boost pressure regulation control unit, also goes for the testing requirement of other control units;
3. in the test of boost pressure regulation control unit, table look-up by two dimension and can learn in real time current pressure with factor of influence, precision is high, and can form the testing process of closed loop control, can be effective to the test system of boost pressure regulation control unit.
Description of drawings
Fig. 1 is the topology diagram that engine booster regulated signal of the present invention produces Niu Fangfa.
Fig. 2 is distributed control unit HIL test platform architecture block diagram.
Fig. 3 is device block diagram of the present invention.
Embodiment
In order to understand better technological scheme of the present invention, below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.
The invention provides a kind of simulated engine boost pressure regulation signal generating method, comprise rotating speed analogue signal generating module, throttle analogue signal product ox module, boost pressure regulation actuator position signal generator module, analog-digital converter, two-dimentional table look-up module, normalization module, logical operation module and CAN bus communication module; Its medium speed analogue signal product ox module, throttle analogue signal are produced the ox module, boost pressure regulation actuator position signal generator module all is connected with analog-digital converter, analog-digital converter all is connected with two-dimentional table look-up module, normalization module and CAN bus communication module, two dimension table look-up module, normalization module all are connected with logical operation module, and logical operation module is connected with CAN bus communication module; Preset the boost pressure two-dimensional data table in two-dimentional table look-up module, variable is rotating speed and throttle in this table, and corresponding pressure both; Preset boost pressure regulation factor of influence one-dimensional data table in the normalization module, wherein variable is normalized actuator position amount, and the factor of influence corresponding with normalized actuator position amount;
This production method carries out A/D with current rotating speed, throttle, actuator position analogue signal and changes, according to current rotating speed, throttle size, two dimension is tabled look-up, interpolation obtains the theoretical boost pressure that not affected by boost pressure regulation, boost pressure regulation actuator position digital quantity is carried out normalized, one dimension is tabled look-up, interpolation obtains boost pressure factor of influence corresponding to boost pressure regulation final controlling element current location, theoretical boost pressure obtains actual supercharge pressure by multiplying each other with factor of influence, at last rotating speed, throttle, actual supercharge pressure is exported by the CAN bus communication.
Example example 1
With reference to Fig. 1
A kind of simulated engine boost pressure regulation signal generating method comprises the following steps:
1), with engine speed analogue signal, throttle analogue signal, boost pressure regulation actuator position signal access Chip Microcomputer A/D C (analog-digital converter) analog input channel, carry out filtering and A/D conversion process.Rotating speed, throttle signal output area are 0～5V, and the rotating speed analogue signal is by A/D transformed mappings to 600～3000r/min, and the throttle analogue signal is by A/D transformed mappings to 5%～100% scope.
2), according to pre-set boost pressure two-dimensional data table, wherein input variable is rotating speed, throttle, undertaken by the size of rotating speed and throttle that two dimension is tabled look-up, interpolation, try to achieve the boost pressure under current described rotating speed, throttle, the theoretical boost pressure before namely regulating.
3), boost pressure regulation actuator position digital quantity is carried out normalized.Described normalization process is as follows:
P 0 ~ 1 = P RT - P MIN P MAX - P MIN - - - ( 1 )
In formula (1), P 0 ~ 1Boost pressure regulation final controlling element relative position, P RTBe the real time position digital quantity of boost pressure regulation final controlling element, P MIN, P MAXBe respectively the boost pressure regulation final controlling element and be in maximum position and the corresponding digital quantity of minimum position.
4), according to pre-set boost pressure regulation factor of influence one-dimensional data table, wherein variable is normalized actuator position amount, is undertaken by boost pressure regulation final controlling element relative position digital quantity that one dimension is tabled look-up, interpolation obtains current boost pressure regulation actuator position to the factor of influence of boost pressure.
What step 2) calculate is not regulate front theoretical boost pressure, but actual supercharge pressure with regulate before theoretical boost pressure deviation is arranged, if it is just accurate not that the theoretical boost pressure before employing is not regulated is simulated output, so in order to reach the actual supercharge pressure of accurate simulation output, need to estimate current boost pressure regulation actuator position to the factor of influence of boost pressure, the theoretical boost pressure that then described factor of influence be multiply by before not regulating just obtains actual supercharge pressure;
Described one-dimensional data table is drawn by test: when normalized actuator position amount is 0, factor of influence is 1, when normalized actuator position amount is 1, factor of influence is 0, when normalized actuator position amount was x, the pressure of measuring this moment was the pressure maximum of 0 o'clock divided by normalized actuator position amount, the factor of influence when being normalized actuator position amount and being x, the like, obtain boost pressure regulation factor of influence one-dimensional data table;
5) before, regulating, theoretical boost pressure and boost pressure factor of influence do not carry out logical process, and representation is:
P real＝P theory×λ (2)
In formula (2), P RealActual supercharge pressure, P TheoryBe theoretical boost pressure before not regulating, λ is the boost pressure factor of influence.
6), rotating speed, throttle, actual supercharge pressure send on the CAN bus by CAN bus communication module.
Embodiment 2
With reference to Fig. 2～Fig. 3, rotating speed analogue signal product ox module, throttle analogue signal are produced the ox module, boost pressure regulation actuator position signal generator module is that analogue signal is sent out the ox module, adopt respectively rotating speed potentiometer 1, throttle potentiometer 2 and actuator position slide-wire rheostat, for generation of engine speed, throttle, supercharging actuator position analogue signal;
Analog-digital converter, two-dimentional table look-up module, normalization module, logical operation module and CAN bus communication module are application program module, this method is changed into corresponding program-code to be moved on single-chip microcomputer, single-chip microcomputer is the XC167 of Infineon, analog-to-digital conversion passage input voltage range is 0 ~ 5V, so rotating speed potentiometer 1, throttle potentiometer 2, actuator position slide-wire rheostat input power are 5V, rotating speed potentiometer 1, throttle potentiometer 2 out-put supply scopes are 0 ~ 5V.Slide-wire rheostat is fixed on the movable valve rod of conventional boost pressure regulation final controlling element, due to the valve handle activity scope and the mounting point limited, out-put supply scope V MIN～V MAX, V MIN, V MAXRespectively final controlling element minimum position place and maximum position place slide-wire rheostat output voltage.
Application program module is used for that this inventive method is changed into corresponding program-code to be moved on single-chip microcomputer, by the CAN bus communication, signal is exported.Carried out successively following steps in program:
1), with engine speed, throttle, boost pressure regulation actuator position signal access Chip Microcomputer A/D C (analog-digital converter) analog input channel, carry out filtering and A/D conversion process.Conversion accuracy control bit RES sets to 0, it is that under default situations, single-chip microcomputer transforms to 0～1023 with 0～5V input that conversion accuracy is 10, application program is passed through A/D transformed mappings to 600～3000r/min with the rotating speed analogue signal, the throttle analogue signal is by A/D transformed mappings to 5%～100% scope, and boost pressure regulation actuator position signal map is to P MIN～P MAX:
P MIN = 1023 5 × V MIN P MAX = 1023 5 × V MA - - - ( 3 )
In formula (3), P MIN, P MAXBe respectively the boost pressure regulation final controlling element and be in maximum position and the corresponding digital quantity of minimum position, V MIN, V MAXRespectively final controlling element minimum position place and maximum position place slide-wire rheostat output voltage.
2), according to pre-set boost pressure two-dimensional data table, wherein variable is rotating speed, throttle and corresponding pressure both, this table is drawn by test of many times; Undertaken by the size of rotating speed and throttle that two dimension is tabled look-up, interpolation, the theoretical boost pressure before the size of trying to achieve the boost pressure under current described rotating speed, throttle is namely regulated.
3), boost pressure regulation actuator position digital quantity is carried out normalized.Described normalization process is as follows:
P 0 ~ 1 = P RT - P MIN P MAX - P MIN - - - ( 4 )
In formula (4), P 0 ~ 1Be boost pressure regulation final controlling element relative position, P RTBe the real time position digital quantity of boost pressure regulation final controlling element, P MIN, P MAXBe respectively the boost pressure regulation final controlling element and be in maximum position and the corresponding digital quantity of maximum position.
4), according to pre-set boost pressure regulation factor of influence one-dimensional data table, wherein variable is normalized actuator position amount, and the factor of influence corresponding with normalized actuator position amount, carry out according to boost pressure regulation final controlling element relative position that one dimension is tabled look-up, interpolation obtains current boost pressure regulation actuator position to the factor of influence of boost pressure.
5) before, regulating, theoretical boost pressure and boost pressure factor of influence do not carry out logical process, and representation is:
P real＝P theory×λ (5)
In formula (5), P RealActual supercharge pressure, P TheoryBe theoretical boost pressure before not regulating, λ is the boost pressure factor of influence.
6), rotating speed, throttle, actual supercharge pressure are exported signal by CAN bus communication module.
Block diagram of the present invention comprises analogue signal and produces ox module, application program puocessing module as shown in Figure 3.The analogue signal generating module is used for producing ox rotating speed, throttle, pressurized machine adjusting actuator position signal; For the analogue signal that produces, application program module is mainly carried out analog-to-digital conversion, and the result after turning carries out Mathematical treatment in single-chip microcomputer, at last with rotating speed, throttle, plenum pressure signal by the output of CAN bus communication module.
That the present invention is applied to boost pressure regulation control unit HIL test structure block diagram as Fig. 2.The rotating speed, throttle, the actuator position analogue signal that collect are sent to the boost pressure regulation control unit by the CAN bus communication, and the boost pressure regulation control unit so forms closed loop control by relatively calculating the action of controlling the boost pressure regulation final controlling element.
In sum, these are only preferred embodiment of the present invention, is not for limiting protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (2)

1. simulated engine boost pressure regulation signal generating method, it is characterized in that, comprise rotating speed analogue signal generating module, throttle analogue signal generating module, boost pressure regulation actuator position signal generator module, analog-digital converter, two-dimentional table look-up module, normalization module, logical operation module and CAN bus communication module; Its medium speed analogue signal generating module, throttle analogue signal generating module, boost pressure regulation actuator position signal generator module all are connected with analog-digital converter, analog-digital converter all is connected with two-dimentional table look-up module, normalization module and CAN bus communication module, two dimension table look-up module, normalization module all are connected with logical operation module, and logical operation module is connected with CAN bus communication module;
Preset the boost pressure two-dimensional data table in two-dimentional table look-up module, variable is rotating speed and throttle in this table, and corresponding boost pressures both;
Preset boost pressure regulation factor of influence one-dimensional data table in the normalization module, wherein variable is normalized actuator position amount, and the factor of influence corresponding with normalized actuator position amount; The obtain manner of described one-dimensional data table is: when normalized actuator position amount is 0, factor of influence is 1, when normalized actuator position amount is 1, factor of influence is 0, when normalized actuator position amount was x, the boost pressure of measuring this moment was the maximum pressure boost of 0 o'clock divided by normalized actuator position amount, the factor of influence when being normalized actuator position amount and being x, the like, obtain boost pressure regulation factor of influence one-dimensional data table;
After step 1, engine speed, throttle, boost pressure regulation actuator position signal that rotating speed analogue signal generating module, throttle analogue signal generating module, boost pressure regulation actuator position signal generator module are produced are sent into analog-digital converter and are carried out filtering and A/D conversion, output speed digital signal, throttle digital signal are to two-dimentional table look-up module and CAN bus communication module, and output boost pressure regulation final controlling element digital signal is to the normalization module;
Step 2, two-dimentional table look-up module carry out according to the size of the rotating speed digital signal that receives and throttle digital signal that two dimension is tabled look-up, interpolation, try to achieve the boost pressure under current described rotating speed, throttle, the theoretical boost pressure before namely not regulating is exported to logical operation module;
The digital quantity of the boost pressure regulation final controlling element digital signal that the docking of step 3, normalization module is received carries out normalized and obtains current normalized actuator position amount, and gets the corresponding factor of influence of current normalized actuator position amount and export to logical operation module according to presetting boost pressure regulation factor of influence one-dimensional data table;
The theoretical boost pressure that step 4, logical operation module will receive before not regulating and the corresponding factor of influence of current normalized actuator position amount multiply each other and obtain actual supercharge pressure and export to CAN bus communication module;
Step 5, CAN bus communication module send to the actual supercharge pressure of rotating speed, throttle and the step 4 of the step 1 that receives on the CAN bus.
2. a kind of simulated engine boost pressure regulation signal generating method as claimed in claim 1, it is characterized in that, described rotating speed analogue signal generating module, throttle analogue signal generating module and boost pressure regulation actuator position signal generator module adopt respectively rotating speed potentiometer, throttle potentiometer and actuator position slide-wire rheostat.
CN201310043973.9A 2013-02-04 2013-02-04 Analog engine pressurization regulating signal generating method Expired - Fee Related CN103104359B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2641295Y (en) * 2003-09-25 2004-09-15 中国燃气涡轮研究院 Electronic control device used for variable-geometry turbine booster
US20070179763A1 (en) * 2006-01-27 2007-08-02 Ricardo, Inc. Apparatus and method for compressor and turbine performance simulation
CN201250710Y (en) * 2008-07-15 2009-06-03 山东申普汽车控制技术有限公司 Liquefied petroleum gas LPG engine control system
CN202431379U (en) * 2011-11-29 2012-09-12 长安大学 Control device for electric control diesel engine supercharger
CN102818706A (en) * 2012-08-28 2012-12-12 上海交通大学 Simulating test method for plateau performance of supercharged engine and device for implementing simulating test method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2641295Y (en) * 2003-09-25 2004-09-15 中国燃气涡轮研究院 Electronic control device used for variable-geometry turbine booster
US20070179763A1 (en) * 2006-01-27 2007-08-02 Ricardo, Inc. Apparatus and method for compressor and turbine performance simulation
CN201250710Y (en) * 2008-07-15 2009-06-03 山东申普汽车控制技术有限公司 Liquefied petroleum gas LPG engine control system
CN202431379U (en) * 2011-11-29 2012-09-12 长安大学 Control device for electric control diesel engine supercharger
CN102818706A (en) * 2012-08-28 2012-12-12 上海交通大学 Simulating test method for plateau performance of supercharged engine and device for implementing simulating test method

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