CN106593672A - Diesel engine calibration method based on LCCE optimization - Google Patents

Diesel engine calibration method based on LCCE optimization Download PDF

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Publication number
CN106593672A
CN106593672A CN201611270444.2A CN201611270444A CN106593672A CN 106593672 A CN106593672 A CN 106593672A CN 201611270444 A CN201611270444 A CN 201611270444A CN 106593672 A CN106593672 A CN 106593672A
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lcce
diesel
consumption
diesel engine
nox
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CN106593672B (en
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刘汉辉
王辉
李明星
黎幸荣
陈峙良
王任信
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Guangxi Yuchai Machinery Co Ltd
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Guangxi Yuchai Machinery Co Ltd
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Priority to PCT/CN2017/078168 priority patent/WO2018120468A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D37/00—Non-electrical conjoint control of two or more functions of engines, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
    • F02D41/0047—Controlling exhaust gas recirculation [EGR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3827—Common rail control systems for diesel engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/3809—Common rail control systems
    • F02D41/3836—Controlling the fuel pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D41/00—Electrical control of supply of combustible mixture or its constituents
    • F02D41/30—Controlling fuel injection
    • F02D41/38—Controlling fuel injection of the high pressure type
    • F02D41/40—Controlling fuel injection of the high pressure type with means for controlling injection timing or duration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/06—Fuel or fuel supply system parameters
    • F02D2200/0625—Fuel consumption, e.g. measured in fuel liters per 100 kms or miles per gallon
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/08—Exhaust gas treatment apparatus parameters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/1002—Output torque
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D2200/00—Input parameters for engine control
    • F02D2200/02—Input parameters for engine control the parameters being related to the engine
    • F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
    • F02D2200/101—Engine speed
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/40—Engine management systems

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

The invention discloses a diesel engine calibration method based on LCCE optimization. The target conversion efficiency, the diesel consumption and the original machine NOx emission are input in a LCCE calculation model to obtain the LCCE quantity; the target diesel consumption is used as the LCCE optimization boundary for optimization; if the present calibrated variable association enables the LCCE quantity to be optimal, the calibrated variable association is selected; and otherwise, other variable association is renewedly selected to calculate the LCCE quantity until the LCCE quantity is optimal. The diesel engine calibration method based on LCCE optimization effectively reduces the total cost of vehicle urea and diesel of a diesel engine, and can reduce the rises of overproof emission and urea crystallization.

Description

Based on the Diesel engine scaling method that LCCE optimizes
Technical field
The present invention relates to Diesel engine demarcates field, more particularly to a kind of Diesel engine demarcation optimized based on LCCE Method.
Background technology
At present, the conventional depleting substance of diesel engine with SCR (SCR) treatment technology route be diesel oil and Urea for vehicle.Wherein, diesel consumption be in order to maintain vehicle to run, and the consumption of urea for vehicle be then used in SCR process in Nitrogen oxides (NOx) in aerofluxuss are reacted to reduce the purpose of gas pollutant discharge.However, reducing diesel engine Diesel consumption and reduction NOx emission are conflicting, when electromotor obtains lower oil consumption so as to reduce diesel consumption, are sent out Motivation NOx emission is necessarily increased, and results in the need for consuming more urea for vehicle.At present, the research of electromotor and car load is by more Many focus concentrate on reduction diesel consumption, and do not cause enough attention to urea for vehicle consumption, meanwhile, it is existing Engine calibration method only focuses on the consumption of diesel oil.And in fact, urea for vehicle price itself is not cheap, or even some are national The price of urea for vehicle can be higher than diesel oil.Urea for vehicle consumption and diesel consumption is how made finally to show minimum in cost, must Must improve on thinking and method is demarcated, the present invention has used LCCE (Liquids Consumption Cost Equivalent) i.e. liquid-consumed this thinking of equivalent price can effectively solve this problem.
The content of the invention
It is an object of the present invention to provide a kind of Diesel engine scaling method optimized based on LCCE, can make diesel engine Total cost of the urea for vehicle and diesel oil of machine is effectively reduced.
For achieving the above object, there is provided a kind of Diesel engine scaling method optimized based on LCCE, the method are included Following process step：
Step 1.1：LCCE computation models are set up, i.e., urea for vehicle consumption is drawn by diesel-fuel consumption, and by car Equivalent diesel-fuel consumption is changed into carbamide consumption, equivalent diesel-fuel consumption is disappeared for total equivalence diesel oil with diesel-fuel consumption sum Consumption, total equivalence diesel-fuel consumption are measured for LCCE；
Step 1.2：The operating mode of electromotor is adjusted and stablizes, then calibrating measuring device is demarcated by variable and measure SCR Limiting efficiency, diesel-fuel consumption and former machine NOx discharge, by the difference of former machine NOx discharge and target NOx discharge divided by Former machine NOx discharge obtains targeted transformation efficiency, and is compared with SCR limiting efficiencies with targeted transformation efficiency, works as target When transformation efficiency is more than SCR limiting efficiencies, then deletes set of variables or re-start variable demarcation, conversely, targeted transformation efficiency is defeated Go out to LCCE computation models；
Step 1.3：Targeted transformation efficiency, diesel-fuel consumption and former machine NOx discharge are input in LCCE computation models LCCE amounts are obtained, and optimizing is carried out as LCCE optimizing border with the target bavin oil consumption that disappears, if the current set of variables demarcated makes Obtain LCCE amounts optimum, then selection is optimization variables group, otherwise reselect other set of variables calculating LCCE amounts, until LCCE is measured most Till excellent.
Preferably, in the step 1.1, it is by diesel-fuel consumption and air mass flow that urea for vehicle consumption obtains process It is added and obtains capacity, is multiplied with NOx original machine concentration of emissions by capacity and obtains NOx amount, by NOx amount and transformation efficiency phase Acquisition ammonia consumption is taken advantage of, is multiplied with equivalent proportion, correction factor and urea for vehicle density successively acquisition by ammonia consumption.
Preferably, in the step 1.1, equivalent diesel oil by urea for vehicle price be multiplied by successively diesel-fuel price inverse and The acquisition reciprocal of diesel oil density, equivalent diesel-fuel consumption are multiplied with urea for vehicle consumption acquisition by equivalent diesel oil.
Preferably, in the step 1.2, by measuring oil mass and former machine NOx emission data set Jing oil masses after variable demarcation Function model obtains diesel-fuel consumption, and Jing original machine NOx emission function models obtain former machine NOx discharge.
Preferably, the oil mass function model is to first pass through rating test to obtain the oil consumption (FB_RATE) of electromotor, correspondence Injection timing (Time) and corresponding injection pressure (Raip) limited discrete point, then carry out three dimensions with these discrete points According to interpolation, fitting, the function model FB_RATE=F (Time, Raip) of finally give a fitting.
Preferably, the former machine NOx emission function model be first pass through rating test obtain electromotor NOx discharge, Corresponding injection timing (Time) and limited discrete point of corresponding injection pressure (Raip), then three are carried out with these discrete points Dimension data interpolation, fitting, the function model NOx=F (Time, Raip) of finally give a fitting.
Preferably, in the step 1.3, LCCE optimizing is to first pass through rating test to obtain the LCCE amounts of electromotor, correspondence Injection timing (Time), corresponding injection pressure (Raip) and corresponding EGR rate limited discrete point, it is then discrete with these Point carries out three-dimensional data interpolation, fitting, and the function model of finally give a fitting carries out optimizing.
Preferably, the variable includes rail pressure, injection timing and EGR rate in demarcating.
Compared with prior art, its advantage is the present invention：
Urea for vehicle consumption is converted into equivalent diesel-fuel consumption plus bavin by setting up LCCE computation models by the present invention Oilconsumption and obtain LCCE amounts, and carry out that LCCE amounts are optimum to be judged, until selecting the set of variables of optimal L CCE amount, bavin can be made Total cost of the urea for vehicle and diesel oil of oil turbine is effectively reduced.The present invention can reduce the exceeded wind with urea crystals of discharge Danger.The inventive method causes the determination of former machine NOx discharge more to have targeted, reduces the repetition amount of staking-out work, saves exploitation Cost.
Description of the drawings
Fig. 1 is the theory diagram of the present invention；
Fig. 2 is LCCE computation model theory diagrams in the present invention.
Specific embodiment
With reference to embodiment, the invention will be further described, but does not constitute any limitation of the invention, any The modification of the limited number of time made in scope of the invention as claimed, still in scope of the presently claimed invention.
As shown in Figure 1 and Figure 2, the invention provides a kind of Diesel engine scaling method optimized based on LCCE, the method Including following process step：
Step 1.1：LCCE computation models are set up, i.e., urea for vehicle consumption is drawn by diesel-fuel consumption, and by car Equivalent diesel-fuel consumption is changed into carbamide consumption, equivalent diesel-fuel consumption is disappeared for total equivalence diesel oil with diesel-fuel consumption sum Consumption, total equivalence diesel-fuel consumption are measured for LCCE；
Step 1.2：The operating mode of electromotor is adjusted and stablizes, then calibrating measuring device is demarcated by variable and measure SCR Limiting efficiency, diesel-fuel consumption and former machine NOx discharge, by the difference of former machine NOx discharge and target NOx discharge divided by Target NOx discharge obtains targeted transformation efficiency, and is compared with SCR limiting efficiencies with targeted transformation efficiency, works as target When transformation efficiency is more than SCR limiting efficiencies, then deletes set of variables or re-start variable demarcation, conversely, targeted transformation efficiency is defeated Go out to LCCE computation models；
Step 1.3：Targeted transformation efficiency, diesel-fuel consumption and former machine NOx discharge are input in LCCE computation models LCCE amounts are obtained, and optimizing is carried out as LCCE optimizing border with the target bavin oil consumption that disappears, if the current set of variables demarcated makes Obtain LCCE amounts optimum, then selection is optimization variables group, otherwise reselect other set of variables calculating LCCE amounts, until LCCE is measured most Till excellent.
In the present embodiment, target NOx discharge be enterprise according to national legislation, it is necessary to control through SCR conversion after Highest NOx discharge.Target diesel-fuel consumption is the desired value made by oneself in each diesel engine company development process.SCR Limiting efficiency for SCR catalyst transformation efficiency convert before NOx concentration deduct conversion after NOx concentration again divided by conversion before NOx concentration obtained by ratio.
In step 1.1, acquisition capacity is added by diesel-fuel consumption with air mass flow, by capacity and NOx original machines Concentration of emission be multiplied obtain NOx amount, by NOx amount be multiplied with transformation efficiency obtain ammonia consumption, by ammonia consumption successively with Equivalent proportion, correction factor are multiplied with urea for vehicle density and obtain urea for vehicle consumption.
In step 1.1, worked as with the inverse of the inverse and diesel oil density of diesel-fuel price by urea for vehicle price successively Amount diesel oil, and by equivalent diesel oil be multiplied with urea for vehicle consumption obtain equivalent diesel-fuel consumption.
In step 1.2, variable is obtained by measuring oil mass and former machine NOx emission data set Jing oil masses function model after demarcating Diesel-fuel consumption, and Jing original machine NOx emission function models obtain former machine NOx discharge.
Oil mass function model is to first pass through rating test to obtain the oil consumption (FB_RATE) of electromotor, corresponding injection timing (Time) and corresponding injection pressure (Raip) limited discrete point, then carried out with these discrete points three-dimensional data interpolation, intend Close, the function model FB_RATE=F (Time, Raip) of finally give a fitting.
Former machine NOx emission function model is to first pass through rating test just to obtain the NOx discharge of electromotor, corresponding oil spout When (Time) and corresponding injection pressure (Raip) limited discrete point, then carried out with these discrete points three-dimensional data interpolation, Fitting, the function model NOx=F (Time, Raip) of finally give a fitting.
In step 1.3, LCCE optimizing is to first pass through rating test to obtain the LCCE amounts of electromotor, corresponding injection timing (Time), limited discrete point of corresponding injection pressure (Raip) and corresponding EGR rate, then three-dimensional is carried out with these discrete points Data interpolating, fitting, the function model of finally give a fitting carry out optimizing.Can in the function model by iterative method To show that optimal L CCE is measured.
Variable includes rail pressure, injection timing and EGR rate in demarcating.Exhausted air quantity and suction cylinder of the EGR rate for recirculation Air inlet total amount ratio.
In the present embodiment, measurement apparatus can be sensor, to record the critical parameter informations such as rotating speed, moment of torsion.
The above is only the preferred embodiment of the present invention, it should be pointed out that for a person skilled in the art, do not taking off On the premise of present configuration, some deformations and improvement can also be made, these are all without the effect for affecting the present invention to implement And practical applicability.

Claims (8)

1. it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that the method includes following process step：
Step 1.1：LCCE computation models are set up, i.e., urea for vehicle consumption is drawn by diesel-fuel consumption, and by automobile-used urine Plain consumption changes into equivalent diesel-fuel consumption, and equivalent diesel-fuel consumption is total equivalence diesel consumption with diesel-fuel consumption sum Amount, total equivalence diesel-fuel consumption are measured for LCCE；
Step 1.2：The operating mode of electromotor is adjusted and stablizes, then calibrating measuring device is demarcated by variable and measure the SCR limit Efficiency, diesel-fuel consumption and former machine NOx discharge, by the difference of former machine NOx discharge and target NOx discharge divided by former machine NOx discharge obtains targeted transformation efficiency, and is compared with SCR limiting efficiencies with targeted transformation efficiency, works as targeted transformation When efficiency is more than SCR limiting efficiencies, then deletes set of variables or re-start variable demarcation, conversely, the output of targeted transformation efficiency is arrived LCCE computation models；
Step 1.3：Targeted transformation efficiency, diesel-fuel consumption and former machine NOx discharge are input in LCCE computation models and are obtained LCCE is measured, and carries out optimizing as LCCE optimizing border with the target bavin oil consumption that disappears, if the current set of variables demarcated is caused LCCE amounts are optimum, then selection is optimization variables group, otherwise reselect other set of variables and calculate LCCE amounts, until LCCE amount optimums Till.
2. it is according to claim 1 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described In step 1.1, it is that acquisition capacity is added with air mass flow by diesel-fuel consumption that urea for vehicle consumption obtains process, is passed through Capacity is multiplied with NOx original machine concentration of emissions and obtains NOx amount, is multiplied with transformation efficiency by NOx amount and is obtained ammonia consumption, is passed through Ammonia consumption is multiplied with equivalent proportion, correction factor and urea for vehicle density acquisition successively.
3. it is according to claim 2 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described In step 1.1, equivalent diesel oil is multiplied by the acquisition reciprocal of the inverse and diesel oil density of diesel-fuel price successively by urea for vehicle price, Equivalent diesel-fuel consumption is multiplied with urea for vehicle consumption acquisition by equivalent diesel oil.
4. it is according to claim 1 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described In step 1.2, variable obtains diesel consumption by measuring oil mass and former machine NOx emission data set Jing oil masses function model after demarcating Amount, and Jing original machine NOx emission function models obtain former machine NOx discharge.
5. it is according to claim 4 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described Oil mass function model be first pass through rating test obtain the oil consumption (FB_RATE) of electromotor, corresponding injection timing (Time) and Limited discrete point of corresponding injection pressure (Raip), then three-dimensional data interpolation, fitting are carried out with these discrete points, final The function model FB_RATE=F (Time, Raip) of the fitting arrived.
6. it is according to claim 4 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described Former machine NOx emission function model is to first pass through rating test to obtain the NOx discharge of electromotor, corresponding injection timing (Time) With limited discrete point of corresponding injection pressure (Raip), then carried out with these discrete points three-dimensional data interpolation, fitting, finally The function model NOx=F of the fitting for obtaining
(Time, Raip).
7. it is according to claim 1 it is a kind of based on LCCE optimize Diesel engine scaling method, it is characterised in that：It is described In step 1.3, LCCE optimizing is to first pass through rating test to obtain the LCCE amounts of electromotor, corresponding injection timing (Time), right The injection pressure (Raip) answered and limited discrete point of corresponding EGR rate, then carried out with these discrete points three-dimensional data interpolation, Fitting, the function model of finally give a fitting carry out optimizing.
8. a kind of Diesel engine scaling method optimized based on LCCE according to claim 1 or 4 or 5, its feature exists In：The variable includes rail pressure, injection timing and EGR rate in demarcating.
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PCT/CN2017/078168 WO2018120468A1 (en) 2016-12-30 2017-03-24 Lcce optimization-based diesel engine calibration method

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WO2021057444A1 (en) * 2019-09-24 2021-04-01 江苏大学 Method for quickly calibrating scr ammonia ratio factor of diesel engine
CN114320627A (en) * 2022-01-17 2022-04-12 潍柴动力股份有限公司 Vehicle diesel engine control method and device
CN114412617A (en) * 2022-01-17 2022-04-29 潍柴动力股份有限公司 Diesel engine control method and related device
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