CN106150718B - A kind of engine gears optimization method and device - Google Patents

A kind of engine gears optimization method and device Download PDF

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Publication number
CN106150718B
CN106150718B CN201610780391.2A CN201610780391A CN106150718B CN 106150718 B CN106150718 B CN 106150718B CN 201610780391 A CN201610780391 A CN 201610780391A CN 106150718 B CN106150718 B CN 106150718B
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Prior art keywords
engine
oil consumption
gear
under
temperature
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CN106150718A (en
Inventor
李达
冯海浩
褚国良
伏金龙
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Weichai Power Co Ltd
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Weichai Power Co Ltd
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Classifications

    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/021—Introducing corrections for particular conditions exterior to the engine
    • F02D41/0235—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus
    • F02D41/027—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus
    • F02D41/029—Introducing corrections for particular conditions exterior to the engine in relation with the state of the exhaust gas treating apparatus to purge or regenerate the exhaust gas treating apparatus the exhaust gas treating apparatus being a particulate filter
    • 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
    • F02D41/02—Circuit arrangements for generating control signals
    • F02D41/14—Introducing closed-loop corrections
    • F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
    • F02D41/1444—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases
    • F02D41/1446—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the characteristics of the combustion gases the characteristics being exhaust temperatures
    • 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

Abstract

The present invention provides a kind of engine gears optimization method and device, based on the first current operating condition of engine, available engine is in the operating condition under different stalls, and then based on the operating condition under different stalls, the universal table of first exhaust temperature and the universal table of the first oil consumption, it obtains that DPF can be made to enter the most fast gear of passive regeneration rate, to reduce the number that DPF enters initiative regeneration in the normal mode, DPF in this way enter initiative regeneration process there are the problem of be also reduced by, and it is taken into account during obtaining gear and considers oil consumption problem, to reduce the oil consumption of engine.And engine exhaust temperature can also be reduced under initiative regeneration mode and promotes gradient, there is the probability of deviation to reduce temperature control, and the number sprayed after reducing under initiative regeneration mode can also further reduce oil consumption to solve the problems, such as the oil dilution as caused by rear spray and DPF sulfur poisoning.

Description

A kind of engine gears optimization method and device
Technical field
The invention belongs to be equipped with the technical field of engines of diesel particulate filter more particularly to a kind of engine gears Optimization method and device.
Background technique
The effect of DPF (Diesel Particulate Filter, diesel particulate filter) is to reduce engine particulate matter Discharge is required to installation DPF, the wherein work of DPF to reach Europe six or other similar discharge phase laws and regulations requirement on engine Process includes passive regeneration process and initiative regeneration process, and engine does not need to carry out HC injection during passive regeneration, only Suitable temperature, which need to be reached, just has the oxidation rate of more efficient to carry out carbonoxide, and needs to control in DPF during initiative regeneration In the case that portion is in suitable high temperature, HC injection is carried out, carbon can just be aoxidized in this way.Wherein HC injection, which refers to, is starting Fuel oil is sprayed in machine exhaust pipe, is increased with promoting dpf temperature but will cause the oil consumption of engine.
And there is no DPF is considered in currently used control engine gears method, when engine uses current control Engine gears method determine gear under be easy to make the delivery temperature under operating condition locating for engine lower and carbon accumulation compared with Fastly, and then DPF is made to be easily accessible initiative regeneration process.
And during the initiative regeneration of DPF, to guarantee that the initiative regeneration of DPF is efficiently and safe, need to spray using HC With rear spray technique, and turn down intake-air throttle valve and increase EGR (Exhaust Gas Recycling, gas recirculation system) effect The technological means such as rate make engine be in a very high and stable exhaust temperature ranges, not only result in a large amount of fuel oil in this way Consumption will cause oil dilution, DPF sulfur poisoning using HC injection and rear spray technique injection great amount of fuel oil.And If will cause DPF as temperature is excessively high if deviation occurs in temperature control during the initiative regeneration of DPF and burn, temperature controlled It is low that will cause dpf regeneration unsuccessful.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of engine gears optimization method and devices, for reducing DPF Into the number of initiative regeneration, to reduce DPF during entering initiative regeneration.Technical solution is such as Under:
The present invention provides a kind of engine gears optimization method, which comprises
Obtain the first current operating condition of engine；
Based on first operating condition, operating condition when engine is in normal mode under different stalls is obtained；
The universal table of first exhaust temperature and the universal table of the first oil consumption are obtained, wherein the universal table of first exhaust temperature is hair Motivation is in the exhaust gas thermometer under normal mode, and the universal table of the first oil consumption is the oil consumption consumption that engine is under normal mode Rate table；
Operating condition, the universal table of first exhaust temperature when being in normal mode based on the engine under different stalls and The universal table of first oil consumption, the gear for obtaining meeting the first preset condition is that engine is in recommendation gear under normal mode, institute Stating the first preset condition is that the diesel particulate filter is made to enter the most fast condition of passive regeneration rate.
Preferably, the operating condition under different stalls when being in normal mode based on the engine, first exhaust The universal table of temperature and the universal table of the first oil consumption, the gear for obtaining meeting the first preset condition is that engine is under normal mode Recommend gear, comprising:
Operating condition when being in normal mode based on the engine under different stalls, from the universal table of first exhaust temperature In select the gear information for meeting the first preset temperature range, wherein first preset temperature range be with the engine Middle diesel particulate filter enter passive regeneration rate it is most fast when diesel particulate filter temperature be the first central temperature formed A temperature range；
Operating condition when being in normal mode based on the engine under different stalls, from the universal table of the first oil consumption Oil consumption consumption rate when engine is in normal mode out under different stalls；
When power and the engine when being in normal mode based on engine under different stalls are in normal mode not With the oil consumption consumption rate under gear, oil consumption when engine is in normal mode under different stalls is obtained；
Oil consumption when being in normal mode based on the engine under different stalls meets the first preset temperature model from described Recommendation gear of the gear for meeting first preset condition for described under normal mode, institute are chosen in the gear information enclosed Stating the first preset condition is that delivery temperature is in the case of first preset temperature range and oil consumption is minimum or oil consumption is in Delivery temperature is closest to first central temperature in minimum situation.
Preferably, described to obtain the first current operating condition of engine, comprising: full in the operating status of the engine When sufficient engine is in the clearance enabled state under normal mode, the first operating condition of the engine is obtained.
Preferably, the method also includes: meet under engine is in regeneration mode in the operating status of the engine Clearance enabled state when, obtain the second current operating condition of engine；
Based on second operating condition, operating condition when engine is in regeneration mode under different stalls is obtained；
The universal table of second exhaust temperature and the universal table of the second oil consumption are obtained, wherein the universal table of second exhaust temperature is hair Motivation is in the exhaust gas thermometer under regeneration mode, and the universal table of the second oil consumption is the oil consumption consumption that engine is under regeneration mode Rate table；
Operating condition, the universal table of second exhaust temperature when being in regeneration mode based on the engine under different stalls and The universal table of second oil consumption, the gear for obtaining meeting the second preset condition is that engine is in recommendation gear under regeneration mode, institute Stating the second preset condition is to reduce the engine by the condition that delivery temperature promotes gradient and sprays after reducing.
Preferably, the operating condition under different stalls when being in regeneration mode based on the engine, second exhaust The universal table of temperature and the universal table of the second oil consumption, the gear for obtaining meeting the second preset condition is that engine is under regeneration mode Recommend gear, comprising:
Operating condition when being in regeneration mode based on the engine under different stalls, from the universal table of second exhaust temperature In select the gear information for meeting the second preset temperature range, wherein second preset temperature range be with diesel particulate mistake The highest delivery temperature in filter upstream is the temperature range that the second central temperature is formed, the diesel particulate filter upstream Highest delivery temperature can make engine reduce delivery temperature promotion gradient and spray after reducing；
Operating condition when being in regeneration mode based on the engine under different stalls, from the universal table of the second oil consumption Oil consumption consumption rate when the engine is in regeneration mode out under different stalls；
Power and the engine when being in regeneration mode based on the engine under different stalls are in regeneration mode When different stalls under oil consumption consumption rate, obtain the oil consumption when engine is in regeneration mode under different stalls；
Oil consumption when being in regeneration mode based on the engine under different stalls meets the second preset temperature model from described Recommendation gear of the gear for meeting second preset condition for described under regeneration mode, institute are chosen in the gear information enclosed Stating the second preset condition is that delivery temperature is in the case of second preset temperature range and oil consumption is minimum or oil consumption is in In minimum situation and delivery temperature is closest to second central temperature.
The present invention provides a kind of engine gears optimization device, and described device includes:
First acquisition unit, for obtaining the first current operating condition of engine；
Operating condition obtaining unit under normal mode obtains engine and is in normal mode for being based on first operating condition Operating condition when formula under different stalls；
Second acquisition unit, for obtaining the universal table of first exhaust temperature and the universal table of the first oil consumption, wherein described first The universal table of delivery temperature is the exhaust gas thermometer that engine is under normal mode, and the universal table of the first oil consumption is that engine is in just Oil consumption consumption rate table under norm formula；
Gear obtaining unit under normal mode, fortune when for being in normal mode based on the engine under different stalls Row operating condition, the universal table of first exhaust temperature and the universal table of the first oil consumption, the gear for obtaining meeting the first preset condition is engine Recommendation gear under normal mode, first preset condition are that the diesel particulate filter is made to enter passive regeneration speed The most fast condition of rate.
Preferably, gear obtaining unit includes: under the normal mode
First gear obtains subelement, operation work when for being in normal mode based on the engine under different stalls Condition selects the gear information for meeting the first preset temperature range from the universal table of first exhaust temperature, wherein described first is pre- If temperature range be with diesel particulate filter in the engine enter passive regeneration rate it is most fast when diesel particulate filter Temperature be the first central temperature formed a temperature range；
First consumption rate obtains subelement, operation when for being in normal mode based on the engine under different stalls Operating condition, the oil consumption consumption rate under different stalls when showing that engine is in normal mode in the universal table of the first oil consumption；
First oil consumption obtains subelement, power when for being in normal mode based on engine under different stalls and described Oil consumption consumption rate when engine is in normal mode under different stalls obtains when engine is in normal mode under different stalls Oil consumption；
First recommends gear to obtain subelement, oil when for being in normal mode based on the engine under different stalls Consumption, it is described that selection, which meets the gear of first preset condition, from the gear information for meeting the first preset temperature range Recommendation gear under normal mode, first preset condition are that delivery temperature is in the first preset temperature range feelings Under condition and oil consumption is minimum or oil consumption in a minimum situation delivery temperature closest to first central temperature.
Preferably, the first acquisition unit is in normal for meeting engine in the operating status of the engine When clearance enabled state under mode, the first operating condition of the engine is obtained.
Preferably, the first acquisition unit is in regeneration for meeting engine in the operating status of the engine When clearance enabled state under mode, the second current operating condition of engine is obtained；
The second acquisition unit, for obtaining the universal table of second exhaust temperature and the universal table of the second oil consumption, wherein described The universal table of second exhaust temperature is the exhaust gas thermometer that engine is under regeneration mode, and the universal table of the second oil consumption is at engine Oil consumption consumption rate table under regeneration mode；
Described device further include:
Operating condition obtaining unit under regeneration mode obtains engine and is in regeneration mould for being based on second operating condition Operating condition when formula under different stalls；
Gear obtaining unit under regeneration mode, fortune when for being in regeneration mode based on the engine under different stalls Row operating condition, the universal table of second exhaust temperature and the universal table of the second oil consumption, the gear for obtaining meeting the second preset condition is engine Recommendation gear under regeneration mode, second preset condition be make the engine reduce delivery temperature promoted gradient and The condition sprayed after reduction.
Preferably, gear obtaining unit includes: under the regeneration mode
Second gear obtains subelement, operation work when for being in regeneration mode based on the engine under different stalls Condition selects the gear information for meeting the second preset temperature range from the universal table of second exhaust temperature, wherein described second is pre- If temperature range be with the highest delivery temperature in diesel particulate filter upstream be the second central temperature formed a temperature model It encloses, after the highest delivery temperature in diesel particulate filter upstream can make engine reduce delivery temperature promotion gradient and reduce Spray；
Second consumption rate obtains subelement, operation when for being in regeneration mode based on the engine under different stalls Operating condition, the oil consumption consumption rate under different stalls when showing that the engine is in regeneration mode in the universal table of the second oil consumption；
Second oil consumption obtains subelement, power when for be in regeneration mode based on the engine under different stalls with Oil consumption consumption rate when the engine is in regeneration mode under different stalls obtains when the engine is in regeneration mode not With the oil consumption under gear；
Second recommends gear to obtain subelement, oil when for being in regeneration mode based on the engine under different stalls Consumption, it is described that selection, which meets the gear of second preset condition, from the gear information for meeting the second preset temperature range Recommendation gear under regeneration mode, second preset condition are that delivery temperature is in the second preset temperature range feelings Under condition and oil consumption is minimum or oil consumption in a minimum situation and delivery temperature is closest to second central temperature.
Compared with prior art, above-mentioned technical proposal provided by the invention has the advantages that
It is available to start based on the first current operating condition of engine from above-mentioned technical proposal provided by the invention Machine is in the operating condition under different stalls, so based under different stalls operating condition, the universal table of first exhaust temperature and The universal table of first oil consumption obtains that DPF can be made to enter the most fast gear of passive regeneration rate, enters actively again to reduce DPF Raw number, such DPF enter initiative regeneration process there are the problem of be also reduced by.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention Some embodiments for those of ordinary skill in the art without creative efforts, can also basis These attached drawings obtain other attached drawings.
Fig. 1 is a kind of flow chart of engine gears optimization method provided in an embodiment of the present invention；
Fig. 2 is that the flow chart for recommending gear is obtained in engine gears optimization method shown in Fig. 1；
Fig. 3 is a kind of schematic diagram of the workflow of engine gears optimization method provided in an embodiment of the present invention；
Fig. 4 is another flow chart of engine gears optimization method provided in an embodiment of the present invention；
Fig. 5 is that the flow chart for recommending gear is obtained in engine gears optimization method shown in Fig. 3；
Fig. 6 is another schematic diagram of the workflow of engine gears optimization method provided in an embodiment of the present invention；
Fig. 7 is a kind of structural schematic diagram of engine gears optimization device provided in an embodiment of the present invention；
Fig. 8 is another structural schematic diagram of engine gears optimization device provided in an embodiment of the present invention.
Specific embodiment
Inventor has found that when the gear of control engine gears method determination of the engine in use at present, Delivery temperature under operating condition locating for engine is lower and carbon accumulation is very fast, and then DPF is made to be easily accessible initiative regeneration process, And series of technical can be brought when DPF enters initiative regeneration process, it is such as above-mentioned after DPF enters initiative regeneration process, The problem of initiative regeneration to guarantee DPF is efficient and safe bring fuel consumption is larger, oil dilution, DPF sulfur poisoning and Occur that DPF caused by deviation is burnt or dpf regeneration is unsuccessful in temperature control.
In order to solve the above technical problems, the embodiment of the present invention provides a kind of engine gears optimization method and device, it is used for The number that DPF enters initiative regeneration is reduced, DPF existing technology during entering initiative regeneration can be thus reduced and ask Topic.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Referring to Fig. 1, being used it illustrates a kind of flow chart of engine gears optimization method provided in an embodiment of the present invention In when engine is in normal mode, DPF is made to enter passive regeneration as far as possible, to reduce the number that DPF enters initiative regeneration, Wherein engine gears optimization method shown in Fig. 1 may comprise steps of:
101: obtaining the first current operating condition of engine.The first operating condition is in engine in embodiments of the present invention Operating status acquisition when meeting the clearance enabled state that engine is under normal mode, many discomforts can be masked in this way The case where closing adjustment gear, and whether the operating status of above-mentioned engine meets the clearance that engine is under normal mode and enables Parameters under state can currently be run by engine determine.
Such as by the current operational mode of engine whether in the normal mode, speed, DOC (Dissolved Organic Carbon, dissolved organic carbon) upstream temperature and whether faulty at least this four parameters of vehicle component determine engine Operating status whether meet the clearance enabled state that engine is under normal mode.
When the current operational mode of engine in the normal mode, speed within the scope of preset vehicle speed, DOC upstream temperature exists In preset temperature range and when failure is not present in vehicle component, then it can determine that the operating status of engine meets engine and is in Clearance enabled state under normal mode, and then subsequent step can be executed.
Wherein whether the vehicle component gear position sensor whether failure can be called such as engine is faulty, and the gear passes Sensor is for detecting the currently used gear of engine.And whether the current operational mode of engine can pass through in the normal mode Engine operation mode mask determines, in the case where engine operation mode mask is not configured within the engine certainly, may be used also To be directly obtained the current operational mode of engine.
At this it may be noted that be a bit: whether the embodiment of the present invention with the current operational mode of above-mentioned engine normal Under mode, speed, DOC upstream temperature and this whether faulty four parameters of vehicle component start to illustrate how to determination Whether the operating status of machine meets the clearance enabled state that engine is under normal mode, can also use in practical applications Other parameters, which to determine and for different parameters setting meet engine and are presently in the condition under application scenarios, to be determined, to this The embodiment of the present invention no longer illustrates.
102: being based on the first operating condition, obtain operating condition when engine is in normal mode under different stalls.Its In the first operating condition be operating condition of the engine under current gear, and operating condition can such as be turned by different parameters Speed and torque indicate.And under different stalls, it can be obtained by the operating condition under some gear under other gears Operating condition such as obtains revolving speed and the torsion for indicating the operating condition under other gears by revolving speed under current gear and torque Square.
Herein it should be noted is that: the operating condition under different stalls herein includes: under current gear Operating condition under one operating condition and other gears, to select one suitably by the operating condition under different stalls Gear, it is most fast that this suitable gear (subsequent recommendation gear) can make DPF enter passive regeneration rate, thus reduce DPF into Enter actively regenerated number.
103: obtaining the universal table of first exhaust temperature and the universal table of the first oil consumption, wherein the universal table of first exhaust temperature is hair Motivation is in the exhaust gas thermometer under normal mode, and the universal table of the first oil consumption is the oil consumption consumption that engine is under normal mode Rate table, the two universal tables can be obtained from the memory space of vehicle where engine, be used certainly in the memory space of vehicle Independently of other storage equipment except vehicle, the universal table of first exhaust temperature and the can also be obtained from other storage equipment The universal table of one oil consumption.
104: operating condition, the universal table of first exhaust temperature when being in normal mode based on engine under different stalls and The universal table of first oil consumption, the gear for obtaining meeting the first preset condition is that engine is in recommendation gear under normal mode, In the first preset condition be so that DPF is entered the most fast condition of passive regeneration rate so that engine using recommend gear when, can So that DPF enters, passive regeneration rate is most fast, to reduce the number that DPF enters initiative regeneration process.
After obtaining engine and being in the recommendation gear under normal mode, it can send and carry the gear letter for recommending gear Number, for example for manual gear, gear signal can be sent in operation interface to remind driver to carry out gear and cut It changes；And for automatic gear, gear signal can be sent to speed changer, so that speed changer can be based in gear signal Recommendation gear operated, speed changer can be directly automatic execute carrying out operation based on the recommendation gear in gear signal It is also possible to after reminding driver, is determined by driver and executed after needing to switch gear, this embodiment of the present invention is not subject to Limitation.
In embodiments of the present invention, operating condition, first row when being in normal mode based on engine under different stalls The universal table of temperature degree and the universal table of the first oil consumption, the gear for obtaining meeting the first preset condition is that engine is under normal mode Recommendation gear process as shown in Fig. 2, may comprise steps of:
201: operating condition when being in normal mode based on engine under different stalls, from the universal table of first exhaust temperature In select the gear information for meeting the first preset temperature range.
In embodiments of the present invention, record has the delivery temperature under different operating conditions in the universal table of first exhaust temperature, It therefore, can be by the operating condition under improper gear directly from first exhaust after pre-setting the first preset temperature range The gear information for meeting the first preset temperature range is selected in the universal table of temperature.
Wherein the first preset temperature range be with DPF in engine enter passive regeneration rate it is most fast when DPF temperature be First central temperature formed a temperature range, as in engine DPF enter passive regeneration rate it is most fast when DPF temperature be 350 degrees Celsius, then the first preset temperature range be with 350 degrees Celsius be the first central temperature, and 350 degrees Celsius forward and In 350 degrees Celsius of temperature ranges that certain temperature obtains backward.
202: operating condition when being in normal mode based on engine under different stalls, from the universal table of the first oil consumption Oil consumption consumption rate when engine is in normal mode out under different stalls.It is recorded in the same universal table of first oil consumption different Oil consumption consumption rate under operating condition under gear, therefore can be by the operating condition under improper gear directly from the first oil consumption The oil consumption consumption rate under different stalls is selected in universal table.
203: when power and engine when being in normal mode based on engine under different stalls are in normal mode not With the oil consumption consumption rate under gear, oil consumption when engine is in normal mode under different stalls is obtained.
The wherein power of engine=torque/9550 revolving speed *, and revolving speed and torque are recorded in engine and are in normal mode When different stalls operating condition in, therefore can directly get revolving speed and torque from operating condition, pass through engine The calculation formula of power obtains power when engine is in normal mode under different stalls.And oil consumption=oil consumption consumption rate * function Rate, therefore directly can directly be calculated when engine is in normal mode under different stalls by oil consumption consumption rate and power Oil consumption.
The power of certain above-mentioned engine can also obtain by other means, such as from the ECU (Electronic of engine Control Unit, electronic control unit) in can read the current revolving speed of engine and torque (torque or according to circulation Fuel delivery, the conversion of torque oil mass, friction torque are calculated), lead to overpowering calculation formula: power=torque/9550 revolving speed * The power under engine current gear is calculated, further according to the gear transformation efficiency under different stalls, it can be deduced that different stalls Under power.
204: oil consumption when being in normal mode based on engine under different stalls, from meeting the first preset temperature range The gear that the first preset condition of satisfaction is chosen in gear information is the recommendation gear under normal mode, and the first preset condition is At delivery temperature in the first preset temperature range and oil consumption is minimum or oil consumption at delivery temperature is most in a minimum situation Close to the first central temperature, in this way can make DPF enter passive regeneration rate it is most fast while, disappearing for oil consumption can be reduced Consumption.
Herein it should be noted is that: if failing not selecting from the universal table of first exhaust temperature, to meet first pre- If the gear information of temperature range, then a temperature range, this temperature range are selected from the universal table of first exhaust temperature In each temperature for other temperature closer to the first central temperature, then select one in this temperature range The minimum gear of a oil consumption is to recommend gear.
From above-mentioned technical proposal it is found that engine gears optimization method provided in an embodiment of the present invention can be based on engine The first current operating condition, available engine are in the operating condition under different stalls, and then based under different stalls Operating condition, the universal table of first exhaust temperature and the universal table of the first oil consumption, obtain that DPF can be made to enter passive regeneration rate most Fast gear, to reduce the number that DPF enters initiative regeneration, such DPF enter initiative regeneration process there are the problem of It is lowered.
It is indicated below with operating condition with revolving speed and torque, and the universal table of first exhaust temperature is DOC upstream exhaust temperature For the universal table of the first oil consumption under universal table (normal mode), normal mode, illustrate that choosing engine is in conjunction with attached drawing 3 The workflow of recommendation gear under normal mode, workflow are as follows:
301: fuel-efficient (to determine whether by engine operation mode, speed, DOC upstream temperature and FId_normal Failure) this four parameters to determine whether the operating status of engine meets clearance that engine is under normal mode enable shape State.Wherein engine operation mode can be determined by engine operation mode mask, and engine operation mode if it does not exist This output valve of mask, can be directly obtained engine operation mode.
302: when the operating status of engine meets the clearance enabled state that engine is under normal mode, obtaining hair The current speed of motivation and revolving speed, engine under different stalls to be calculated by speed, revolving speed, radius of wheel and speed ratio Revolving speed and the current gear estimated.
303: the power under current gear being obtained based on revolving speed and torque, and based on the power and difference under current gear Gear conversion rate under gear obtains the power of engine under different stalls.
304: the revolving speed of engine under power and different stalls based on engine under different stalls obtains under different stalls The torque of engine.
305: the torque of engine under revolving speed and different stalls based on engine under different stalls, from DOC upstream exhaust The delivery temperature of engine under different stalls is obtained in the universal table of temperature (normal mode), and passive regeneration rate is entered with DPF The maximum temperature of DPF when most fast --- 350 degrees Celsius are the first central temperature, are with DOC initiation temperature limit value (passive regeneration) Minimum temperature is that maximum temperature forms the first preset temperature range with stagnant circumstance temperature degree (passive regeneration), meets first to select The gear information of preset temperature range.
306: the torque of engine under revolving speed and different stalls based on engine under different stalls, it is universal from the first oil consumption Obtain the oil consumption consumption rate of engine under different stalls in table (normal mode), and based on the power of engine under different stalls, The oil consumption consumption rate of engine and meet the gear information of the first preset temperature range under different stalls, obtains that oil consumption is minimum to be pushed away Recommend gear.Then gear and current gear will be recommended to be compared, shift-up operation or downshift operation carried out according to comparison result, Middle current gear can be the current shelves estimated by being calculated in 302 by speed, revolving speed, radius of wheel and speed ratio Position, directly can detect current gear by gear position sensor certainly in the case where being equipped with gear position sensor.
In addition, engine gears optimization method provided in an embodiment of the present invention can also be in regeneration mode in engine When, gear is optimized, gradient is promoted to reduce delivery temperature when DPF enters initiative regeneration process, to reduce temperature control The number producing the probability of existing deviation, and being sprayed after reducing, to solve asking for the oil dilution as caused by rear spray and DPF sulfur poisoning Topic, as shown in figure 4, may comprise steps of on the basis of Fig. 1:
105: when the operating status of engine meets the clearance enabled state that engine is under regeneration mode, obtaining hair The second current operating condition of motivation.In embodiments of the present invention, whether the operating status of above-mentioned engine meets at engine Parameters under clearance enabled state under normal mode can currently be run by engine determine.
Such as by the current operational mode of engine whether in the normal mode, speed, DOC upstream temperature and vehicle portion Whether faulty at least this four parameters of part are under normal mode to determine whether the operating status of engine meets engine Clearance enabled state.
When the current operational mode of engine in the normal mode, speed within the scope of preset vehicle speed, DOC upstream temperature exists In preset temperature range and when failure is not present in vehicle component, then it can determine that the operating status of engine meets engine and is in Clearance enabled state under normal mode, and then subsequent step can be executed.
Wherein whether the vehicle component gear position sensor whether failure can be called such as engine is faulty, and the gear passes Sensor is for detecting the currently used gear of engine.And whether the current operational mode of engine can pass through in the normal mode Engine operation mode mask determines, in the case where engine operation mode mask is not configured within the engine certainly, may be used also To be directly obtained the current operational mode of engine.
At this it may be noted that be a bit: whether the embodiment of the present invention with the current operational mode of above-mentioned engine normal Under mode, speed, DOC upstream temperature and this whether faulty four parameters of vehicle component start to illustrate how to determination Whether the operating status of machine meets the clearance enabled state that engine is under normal mode, can also use in practical applications Other parameters, which to determine and for different parameters setting meet engine and are presently in the condition under application scenarios, to be determined, to this The embodiment of the present invention no longer illustrates.
106: being based on the second operating condition, obtain operating condition when engine is in regeneration mode under different stalls.Its In the second operating condition be operating condition of the engine under current gear, and operating condition can such as be turned by different parameters Speed and torque indicate.And under different stalls, it can be obtained by the operating condition under some gear under other gears Operating condition such as obtains revolving speed and the torsion for indicating the operating condition under other gears by revolving speed under current gear and torque Square.
Herein it should be noted is that: the operating condition under different stalls herein includes: under current gear Operating condition under two operating conditions and other gears, to select one suitably by the operating condition under different stalls Gear, this suitable gear (subsequent recommendation gear) can make DPF after entering initiative regeneration process, reduce temperature and control out Number is sprayed after the probability of existing deviation and reduction.
107: obtaining the universal table of second exhaust temperature and the universal table of the second oil consumption, wherein the universal table of second exhaust temperature is hair Motivation is in the exhaust gas thermometer under regeneration mode, and the universal table of the second oil consumption is the oil consumption consumption that engine is under regeneration mode Rate table, the two universal tables can be obtained from the memory space of vehicle where engine, be used certainly in the memory space of vehicle Independently of other storage equipment except vehicle, the universal table of second exhaust temperature and the can also be obtained from other storage equipment The universal table of two oil consumption.
108: operating condition, the universal table of second exhaust temperature when being in regeneration mode based on engine under different stalls and The universal table of second oil consumption, the gear for obtaining meeting the second preset condition is that engine is in recommendation gear under regeneration mode, In the second preset condition be to reduce engine by spray condition after delivery temperature promotes gradient and reduces, controlled out with reducing temperature The probability of existing deviation, and the number sprayed after reducing, to solve the problems, such as the oil dilution as caused by rear spray and DPF sulfur poisoning.
After obtaining engine and being in the recommendation gear under regeneration mode, it can send and carry the gear letter for recommending gear Number, for example for manual gear, gear signal can be sent in operation interface to remind driver to carry out gear and cut It changes；And for automatic gear, gear signal can be sent to speed changer, so that speed changer can be based in gear signal Recommendation gear operated, speed changer can be directly automatic execute carrying out operation based on the recommendation gear in gear signal It is also possible to after reminding driver, is determined by driver and executed after needing to switch gear, this embodiment of the present invention is not subject to Limitation.
In embodiments of the present invention, operating condition, second row when being in regeneration mode based on engine under different stalls The universal table of temperature degree and the universal table of the second oil consumption, the gear for obtaining meeting the second preset condition is that engine is under normal mode Recommendation gear process as shown in figure 5, may comprise steps of:
501: operating condition when being in regeneration mode based on engine under different stalls, from the universal table of second exhaust temperature In select the gear information for meeting the second preset temperature range, wherein the second preset temperature range be with engine reduce be vented It is the temperature range that the second central temperature is formed that temperature, which promotes the temperature sprayed after gradient and reduction,.
In embodiments of the present invention, record has the delivery temperature under different operating conditions in the universal table of second exhaust temperature, It therefore, can be by the operating condition under improper gear directly from second exhaust after pre-setting the second preset temperature range The gear information for meeting the second preset temperature range is selected in the universal table of temperature.
It is the second center temperature that wherein the second preset temperature range, which is with the highest delivery temperature in diesel particulate filter upstream, The temperature range formed is spent, the highest delivery temperature in diesel particulate filter upstream can make engine reduce exhaust temperature Degree promotes gradient and sprays after reducing, and if the highest delivery temperature in diesel particulate filter upstream is 600 degrees Celsius, then second is default Temperature range is with 600 degrees Celsius for the second central temperature, and certain backward forward and at 600 degrees Celsius at 600 degrees Celsius The temperature range that temperature obtains.
502: operating condition when being in regeneration mode based on engine under different stalls, from the universal table of the second oil consumption Oil consumption consumption rate when engine is in regeneration mode out under different stalls.It is recorded in the same universal table of second oil consumption different Oil consumption consumption rate under operating condition under gear, therefore can be by the operating condition under improper gear directly from the second oil consumption The oil consumption consumption rate under different stalls is selected in universal table.
503: power and engine when being in regeneration mode based on engine under different stalls are under regeneration mode not With the oil consumption consumption rate of gear, oil consumption when engine is in regeneration mode under different stalls is obtained.
The wherein power of engine=torque/9550 revolving speed *, and revolving speed and torque are recorded in engine and are in normal mode When different stalls operating condition in, therefore can directly get revolving speed and torque from operating condition, pass through engine The calculation formula of power obtains power when engine is in normal mode under different stalls.And oil consumption=oil consumption consumption rate * function Rate, therefore directly can directly be calculated when engine is in normal mode under different stalls by oil consumption consumption rate and power Oil consumption.
The power of certain above-mentioned engine can also obtain by other means, can such as read from the ECU of engine (torque can also be calculated according to fuel delivery per cycle, the conversion of torque oil mass, friction torque for the current revolving speed of engine and torque Out), lead to overpowering calculation formula: power=torque/9550 revolving speed * calculate the power under engine current gear, then root According to the gear transformation efficiency under different stalls, it can be deduced that the power under different stalls.
504: oil consumption when being in regeneration mode based on engine under different stalls, from meeting the second preset temperature range The gear that the second preset condition of satisfaction is chosen in gear information is the recommendation gear under regeneration mode, wherein the second default item Part be at delivery temperature in the second preset temperature range and oil consumption is minimum or oil consumption in a minimum situation and be vented Temperature is closest to the second central temperature, in this way after entering initiative regeneration process, can reduce delivery temperature and promote gradient, with drop Low temperature controls the number for the probability of deviation occur, and spraying after reducing, to solve the oil dilution as caused by rear spray and DPF sulphur The problem of poisoning, can also further reduce oil consumption.
Herein it should be noted is that: if failing not selecting from the universal table of second exhaust temperature, to meet second pre- If the gear information of temperature range, then a temperature range, this temperature range are selected from the universal table of second exhaust temperature In each temperature for other temperature closer to the second central temperature, then select one in this temperature range The minimum gear of a oil consumption is to recommend gear.
It is indicated below with operating condition with revolving speed and torque, and the universal table of second exhaust temperature is DOC upstream exhaust temperature For the universal table of the second oil consumption under universal table (regeneration mode), regeneration mode, illustrate that choosing engine is in conjunction with attached drawing 6 The workflow of recommendation gear under normal mode, workflow are as follows:
601: being regenerated by engine operation mode, speed, DOC upstream temperature and FId_ fuel-efficient (to determine whether event Barrier) this four parameters determine whether the operating status of engine meets the enabled shape of clearance that engine be under regeneration mode State.Wherein engine operation mode can be determined by engine operation mode mask, and engine operation mode if it does not exist This output valve of mask, can be directly obtained engine operation mode.
602: when the operating status of engine meets the clearance enabled state that engine is under regeneration mode, obtaining hair The current speed of motivation and revolving speed, engine under different stalls to be calculated by speed, revolving speed, radius of wheel and speed ratio Revolving speed and the current gear estimated.
606: the power under current gear being obtained based on revolving speed and torque, and based on the power and difference under current gear Gear conversion rate under gear obtains the power of engine under different stalls.
604: the revolving speed of engine under power and different stalls based on engine under different stalls obtains under different stalls The torque of engine.
605: the torque of engine under revolving speed and different stalls based on engine under different stalls, from DOC upstream exhaust The delivery temperature of engine under different stalls is obtained in the universal table of temperature (regeneration mode), and with 600 degrees Celsius for the second center Temperature is formed with DOC initiation temperature limit value (initiative regeneration) for minimum temperature with stagnant circumstance temperature degree (initiative regeneration) for maximum temperature Second preset temperature range, to select the gear information for meeting the second preset temperature range.
606: the torque of engine under revolving speed and different stalls based on engine under different stalls, it is universal from the second oil consumption Obtain the oil consumption consumption rate of engine under different stalls in table (regeneration mode), and based on the power of engine under different stalls, The oil consumption consumption rate of engine and meet the gear information of the second preset temperature range under different stalls, obtains that oil consumption is minimum to be pushed away Recommend gear.Then gear and current gear will be recommended to be compared, shift-up operation or downshift operation carried out according to comparison result, Middle current gear can be the current shelves estimated by being calculated in 602 by speed, revolving speed, radius of wheel and speed ratio Position, directly can detect current gear by gear position sensor certainly in the case where being equipped with gear position sensor.
For the various method embodiments described above, for simple description, therefore, it is stated as a series of action combinations, but Be those skilled in the art should understand that, the present invention is not limited by the sequence of acts described because according to the present invention, certain A little steps can be performed in other orders or simultaneously.Secondly, those skilled in the art should also know that, it is retouched in specification The embodiment stated belongs to preferred embodiment, and related actions and modules are not necessarily necessary for the present invention.
Referring to Fig. 7, it illustrates a kind of structural representation of engine gears provided in an embodiment of the present invention optimization device, For making DPF enter passive regeneration as far as possible when engine is in normal mode, to reduce time that DPF enters initiative regeneration Number, wherein the optimization of engine gears shown in Fig. 7 device may include: operating condition acquisition list under first acquisition unit 11, normal mode Gear obtaining unit 14 under member 12, second acquisition unit 13 and normal mode.
First acquisition unit 11, for obtaining the first current operating condition of engine.In embodiments of the present invention first Operating condition acquisition when the operating status of engine meets the clearance enabled state that engine is under normal mode, in this way may be used To mask many case where being not suitable for adjustment gear, and whether the operating status of above-mentioned engine meets engine and is in normal Parameters under clearance enabled state under mode can currently be run by engine determine, referring specifically to method reality Apply the related description of example part.
Operating condition obtaining unit 12 under normal mode obtains engine and is in normal mode for being based on the first operating condition When different stalls under operating condition.Wherein the first operating condition is operating condition of the engine under current gear, and is run Operating condition can be indicated by different parameters such as revolving speed and torque.And under different stalls, the fortune under some gear can be passed through Row operating condition obtains the operating condition under other gears, such as indicates other shelves by revolving speed under current gear and torque obtaining The revolving speed and torque of operating condition under position.
Herein it should be noted is that: the operating condition under different stalls herein includes: under current gear Operating condition under one operating condition and other gears, to select one suitably by the operating condition under different stalls Gear, it is most fast that this suitable gear (subsequent recommendation gear) can make DPF enter passive regeneration rate, thus reduce DPF into Enter actively regenerated number.
Second acquisition unit 13, for obtaining the universal table of first exhaust temperature and the universal table of the first oil consumption, wherein first row The universal table of temperature degree is the exhaust gas thermometer that engine is under normal mode, and the universal table of the first oil consumption is that engine is in normal Oil consumption consumption rate table under mode.
Gear obtaining unit 14 under normal mode, operation when for being in normal mode based on engine under different stalls Operating condition, the universal table of first exhaust temperature and the universal table of the first oil consumption, the gear for obtaining meeting the first preset condition is at engine Recommendation gear under normal mode, the first preset condition are that diesel particulate filter is made to enter the most fast item of passive regeneration rate Part is entered actively so that engine when using gear is recommended, can make DPF enter passive regeneration rate most fast with reducing DPF The number of regenerative process.
In embodiments of the present invention under normal mode gear obtaining unit 14 may include: the first gear obtain subelement, First consumption rate obtains subelement, the first oil consumption obtains subelement and first recommends gear to obtain subelement.
First gear acquisition subelement, operating condition when for being in normal mode based on engine under different stalls, The gear information for meeting the first preset temperature range is selected from the universal table of first exhaust temperature, wherein the first preset temperature model Enclose for DPF in engine enter passive regeneration rate it is most fast when DPF temperature be the first central temperature formed a temperature Range.
First consumption rate obtains subelement, operation work when for being in normal mode based on engine under different stalls Condition, the oil consumption consumption rate under different stalls when showing that engine is in normal mode in the universal table of the first oil consumption.
First oil consumption obtains subelement, power when for be in normal mode based on engine under different stalls with start Oil consumption consumption rate when machine is in normal mode under different stalls obtains oil when engine is in normal mode under different stalls Consumption.
First recommendation gear acquisition subelement, oil consumption when for being in normal mode based on engine under different stalls, The gear for meeting the first preset condition is chosen from the gear information for meeting the first preset temperature range as under normal mode Recommendation gear, the first preset condition is that delivery temperature is in the case of the first preset temperature range and oil consumption is minimum or oil consumption Place in a minimum situation delivery temperature closest to the first central temperature.
The related description of method part is please referred to for the specific implementation procedure of above-mentioned each subelement, and is needed herein What is illustrated is a bit: if failing not selecting the gear for meeting the first preset temperature range from the universal table of first exhaust temperature Information, then select a temperature range from the universal table of first exhaust temperature, and each temperature in this temperature range is opposite Closer to the first central temperature for other temperature, the minimum gear of oil consumption is then selected in this temperature range To recommend gear.
From above-mentioned technical proposal it is found that engine gears provided in an embodiment of the present invention optimization device can be based on engine The first current operating condition, available engine are in the operating condition under different stalls, and then based under different stalls Operating condition, the universal table of first exhaust temperature and the universal table of the first oil consumption, obtain that DPF can be made to enter passive regeneration rate most Fast gear, to reduce the number that DPF enters initiative regeneration, such DPF enter initiative regeneration process there are the problem of It is lowered.
Referring to Fig. 8, it illustrates another structures of engine gears provided in an embodiment of the present invention optimization device to show It is intended to, can also includes: gear obtaining unit under operating condition obtaining unit 15 and regeneration mode under regeneration mode on the basis of Fig. 7 16。
Wherein first acquisition unit 11 meet engine for the operating status in engine and are in putting under regeneration mode When row enabled state, the second current operating condition of engine is obtained.
Second acquisition unit 13, for obtaining the universal table of second exhaust temperature and the universal table of the second oil consumption, wherein second row The universal table of temperature degree is the exhaust gas thermometer that engine is under regeneration mode, and the universal table of the second oil consumption is that engine is in regeneration Oil consumption consumption rate table under mode.
Operating condition obtaining unit 15 under regeneration mode obtains engine and is in regeneration mode for being based on the second operating condition When different stalls under operating condition.Wherein the second operating condition is operating condition of the engine under current gear, and is run Operating condition can be indicated by different parameters such as revolving speed and torque.And under different stalls, the fortune under some gear can be passed through Row operating condition obtains the operating condition under other gears, such as indicates other shelves by revolving speed under current gear and torque obtaining The revolving speed and torque of operating condition under position.
Herein it should be noted is that: the operating condition under different stalls herein includes: under current gear Operating condition under two operating conditions and other gears, to select one suitably by the operating condition under different stalls Gear, this suitable gear (subsequent recommendation gear) can make DPF after entering initiative regeneration process, reduce temperature and control out Number is sprayed after the probability of existing deviation and reduction.
Gear obtaining unit 16 under regeneration mode, operation when for being in regeneration mode based on engine under different stalls Operating condition, the universal table of second exhaust temperature and the universal table of the second oil consumption, the gear for obtaining meeting the second preset condition is at engine Recommendation gear under regeneration mode, the second preset condition make engine reduce delivery temperature promotion gradient and spray after reducing There is the probability of deviation, and the number sprayed after reducing to reduce temperature control in condition, dilute to solve the machine oil as caused by rear spray The problem of releasing with DPF sulfur poisoning.
In embodiments of the present invention, gear obtaining unit 16 includes: that the second gear obtains subelement, second under regeneration mode Consumption rate obtains subelement, the second oil consumption obtains subelement and second recommends gear to obtain subelement.
Second gear acquisition subelement, operating condition when for being in regeneration mode based on engine under different stalls, The gear information for meeting the second preset temperature range is selected from the universal table of second exhaust temperature, wherein the second preset temperature model Enclose a temperature range to take the highest delivery temperature in the upstream DPF as the formation of the second central temperature, the highest exhaust in the upstream DPF Temperature can make engine reduce delivery temperature promotion gradient and spray after reducing.
Second consumption rate obtains subelement, operation work when for being in regeneration mode based on engine under different stalls Condition, the oil consumption consumption rate under different stalls when showing that engine is in regeneration mode in the universal table of the second oil consumption.
Second oil consumption obtains subelement, power when for be in regeneration mode based on engine under different stalls with start Oil consumption consumption rate when machine is in regeneration mode under different stalls obtains oil when engine is in regeneration mode under different stalls Consumption.
Second recommendation gear acquisition subelement, oil consumption when for being in regeneration mode based on engine under different stalls, The gear for meeting the second preset condition is chosen from the gear information for meeting the second preset temperature range as under regeneration mode Recommendation gear, the second preset condition is that delivery temperature is in the case of the second preset temperature range and oil consumption is minimum or oil consumption Place is in a minimum situation and delivery temperature is closest to the second central temperature.
It can after DPF enters initiative regeneration process by the recommendation gear that the second preset condition of above-mentioned setting selects Promote gradient to reduce delivery temperature, the probability of deviation occur to reduce temperature control, and the number sprayed after reducing, with solve by The problem of oil dilution caused by rear spray and DPF sulfur poisoning, it can also further reduce oil consumption.For under above-mentioned regeneration mode The implementation procedure of each subelement please refers to the related description of method part in gear obtaining unit 16.
It should be noted that all the embodiments in this specification are described in a progressive manner, each embodiment weight Point explanation is the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For device class embodiment, since it is basically similar to the method embodiment, so being described relatively simple, related place ginseng See the part explanation of embodiment of the method.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning Covering non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes that A little elements, but also including other elements that are not explicitly listed, or further include for this process, method, article or The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged Except there is also other identical elements in the process, method, article or apparatus that includes the element.
The foregoing description of the disclosed embodiments can be realized those skilled in the art or using the present invention.To this A variety of modifications of a little embodiments will be apparent for a person skilled in the art, and the general principles defined herein can Without departing from the spirit or scope of the present invention, to realize in other embodiments.Therefore, the present invention will not be limited It is formed on the embodiments shown herein, and is to fit to consistent with the principles and novel features disclosed in this article widest Range.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered It is considered as protection scope of the present invention.

Claims (10)

1. a kind of engine gears optimization method, which is characterized in that the described method includes:
Obtain the first current operating condition of engine；
Based on first operating condition, operating condition when engine is in normal mode under different stalls is obtained；
The universal table of first exhaust temperature and the universal table of the first oil consumption are obtained, wherein the universal table of first exhaust temperature is engine Exhaust gas thermometer under normal mode, the universal table of the first oil consumption are the oil consumption consumption rates that engine is under normal mode Table；
Operating condition, the universal table of first exhaust temperature and first when being in normal mode based on the engine under different stalls The universal table of oil consumption, the gear for obtaining meeting the first preset condition is that engine is in recommendation gear under normal mode, described the One preset condition is that diesel particulate filter is made to enter the most fast condition of passive regeneration rate.
2. the method according to claim 1, wherein described be based on difference when the engine is in normal mode Operating condition, the universal table of first exhaust temperature and the universal table of the first oil consumption under gear obtain the shelves for meeting the first preset condition Position is that engine is in the recommendation gear under normal mode, comprising:
Operating condition when being in normal mode based on the engine under different stalls is selected from the universal table of first exhaust temperature The gear information for meeting the first preset temperature range is taken out, wherein first preset temperature range is with bavin in the engine Oil particles filter enter passive regeneration rate it is most fast when diesel particulate filter temperature be the first central temperature formed one A temperature range；
Operating condition when being in normal mode based on the engine under different stalls, the get from the first oil consumption universal table Oil consumption consumption rate when motivation is in normal mode under different stalls；
Difference shelves when power when being in normal mode based on engine under different stalls is in normal mode with the engine Oil consumption consumption rate under position, obtains oil consumption when engine is in normal mode under different stalls；
Oil consumption when being in normal mode based on the engine under different stalls, from first preset temperature range that meets Choose that meet the gear of first preset condition be the recommendation gear under normal mode in gear information, described the One preset condition is that delivery temperature is in the case of first preset temperature range and oil consumption is minimum or oil consumption be in it is minimum In the case of delivery temperature closest to first central temperature.
3. the method according to claim 1, wherein described obtain the first current operating condition of engine, packet It includes: when the operating status of the engine meets the clearance enabled state that engine is under normal mode, obtaining the hair First operating condition of motivation；Wherein it is enabled to meet the clearance that engine is under normal mode for the operating status of the engine At least include: when state the current operational mode of the engine in the normal mode, speed within the scope of preset vehicle speed, dissolution Property organic carbon DOC upstream temperature is in preset temperature range and failure is not present in vehicle component.
4. according to the method described in claim 3, it is characterized in that, the method also includes: in the operation shape of the engine When state meets the clearance enabled state that engine is under regeneration mode, the second current operating condition of engine is obtained；
Based on second operating condition, operating condition when engine is in regeneration mode under different stalls is obtained；
The universal table of second exhaust temperature and the universal table of the second oil consumption are obtained, wherein the universal table of second exhaust temperature is engine Exhaust gas thermometer under regeneration mode, the universal table of the second oil consumption are the oil consumption consumption rates that engine is under regeneration mode Table；
Operating condition, the universal table of second exhaust temperature and second when being in regeneration mode based on the engine under different stalls The universal table of oil consumption, the gear for obtaining meeting the second preset condition is that engine is in recommendation gear under regeneration mode, described the Two preset conditions are to reduce the engine by the condition that delivery temperature promotes gradient and sprays after reducing.
5. according to the method described in claim 4, it is characterized in that, described be based on difference when the engine is in regeneration mode Operating condition, the universal table of second exhaust temperature and the universal table of the second oil consumption under gear obtain the shelves for meeting the second preset condition Position is that engine is in the recommendation gear under regeneration mode, comprising:
Operating condition when being in regeneration mode based on the engine under different stalls is selected from the universal table of second exhaust temperature The gear information for meeting the second preset temperature range is taken out, wherein second preset temperature range is with diesel particulate filter The highest delivery temperature in upstream is the temperature range that the second central temperature is formed, diesel particulate filter upstream highest Delivery temperature can make engine reduce delivery temperature promoted gradient and reduce after spray；
Operating condition when being in regeneration mode based on the engine under different stalls obtains institute from the universal table of the second oil consumption State oil consumption consumption rate when engine is in regeneration mode under different stalls；
When power and the engine when being in regeneration mode based on the engine under different stalls are in regeneration mode not With the oil consumption consumption rate under gear, the oil consumption when engine is in regeneration mode under different stalls is obtained；
Oil consumption when being in regeneration mode based on the engine under different stalls, from second preset temperature range that meets Choose that meet the gear of second preset condition be the recommendation gear under regeneration mode in gear information, described the Two preset conditions are that delivery temperature is in the case of second preset temperature range and oil consumption is minimum or oil consumption be in it is minimum In the case of and delivery temperature closest to second central temperature.
6. a kind of engine gears optimize device, which is characterized in that described device includes:
First acquisition unit, for obtaining the first current operating condition of engine；
Operating condition obtaining unit under normal mode, when being in normal mode for obtaining engine based on first operating condition Operating condition under different stalls；
Second acquisition unit, for obtaining the universal table of first exhaust temperature and the universal table of the first oil consumption, wherein the first exhaust The universal table of temperature is the exhaust gas thermometer that engine is under normal mode, and the universal table of the first oil consumption is that engine is in normal mode Oil consumption consumption rate table under formula；
Gear obtaining unit under normal mode, operation work when for being in normal mode based on the engine under different stalls Condition, the universal table of first exhaust temperature and the universal table of the first oil consumption, the gear for obtaining meeting the first preset condition are in for engine Recommendation gear under normal mode, first preset condition are that so that diesel particulate filter is entered passive regeneration rate most fast Condition.
7. device according to claim 6, which is characterized in that gear obtaining unit includes: under the normal mode
First gear acquisition subelement, operating condition when for being in normal mode based on the engine under different stalls, The gear information for meeting the first preset temperature range is selected from the universal table of first exhaust temperature, wherein the described first default temperature Degree range be with diesel particulate filter in the engine enter passive regeneration rate it is most fast when diesel particulate filter temperature Degree is the temperature range that the first central temperature is formed；
First consumption rate obtains subelement, operation work when for being in normal mode based on the engine under different stalls Condition, the oil consumption consumption rate under different stalls when showing that engine is in normal mode in the universal table of the first oil consumption；
First oil consumption obtains subelement, power when for being in normal mode based on engine under different stalls and described starts Oil consumption consumption rate when machine is in normal mode under different stalls obtains oil when engine is in normal mode under different stalls Consumption；
First recommendation gear acquisition subelement, oil consumption when for being in normal mode based on the engine under different stalls, From in the gear information for meeting the first preset temperature range choose meet first preset condition gear be it is described from Recommendation gear under normal mode, first preset condition are that delivery temperature is in the first preset temperature range situation Lower and oil consumption is minimum or oil consumption in a minimum situation delivery temperature closest to first central temperature.
8. device according to claim 6, which is characterized in that the first acquisition unit, in the engine When operating status meets the clearance enabled state that engine is under normal mode, the first operation work of the engine is obtained Condition；At least include: when wherein the operating status of the engine meets the clearance enabled state that engine is under normal mode The current operational mode of the engine is in the normal mode, speed is within the scope of preset vehicle speed, the upstream dissolved organic carbon DOC Temperature is in preset temperature range and failure is not present in vehicle component.
9. device according to claim 8, which is characterized in that the first acquisition unit, in the engine When operating status meets the clearance enabled state that engine is under regeneration mode, the second current operation work of engine is obtained Condition；
The second acquisition unit, for obtaining the universal table of second exhaust temperature and the universal table of the second oil consumption, wherein described second The universal table of delivery temperature is the exhaust gas thermometer that engine is under regeneration mode, and the universal table of the second oil consumption is that engine is in again Oil consumption consumption rate table under raw mode；
Described device further include:
Operating condition obtaining unit under regeneration mode, when being in regeneration mode for obtaining engine based on second operating condition Operating condition under different stalls；
Gear obtaining unit under regeneration mode, operation work when for being in regeneration mode based on the engine under different stalls Condition, the universal table of second exhaust temperature and the universal table of the second oil consumption, the gear for obtaining meeting the second preset condition are in for engine Recommendation gear under regeneration mode, second preset condition are to reduce the engine by delivery temperature to promote gradient and reduction The condition sprayed afterwards.
10. device according to claim 9, which is characterized in that gear obtaining unit includes: under the regeneration mode
Second gear acquisition subelement, operating condition when for being in regeneration mode based on the engine under different stalls, The gear information for meeting the second preset temperature range is selected from the universal table of second exhaust temperature, wherein the described second default temperature Degree range be with the highest delivery temperature in diesel particulate filter upstream be the second central temperature formed a temperature range, institute Stating diesel particulate filter can make engine reduce delivery temperature promotion gradient and spray after reducing；
Second consumption rate obtains subelement, operation work when for being in regeneration mode based on the engine under different stalls Condition, the oil consumption consumption rate under different stalls when showing that the engine is in regeneration mode in the universal table of the second oil consumption；
Second oil consumption obtains subelement, power when for being in regeneration mode based on the engine under different stalls and described Oil consumption consumption rate when engine is in regeneration mode under different stalls obtains difference shelves when the engine is in regeneration mode Oil consumption under position；
Second recommendation gear acquisition subelement, oil consumption when for being in regeneration mode based on the engine under different stalls, From in the gear information for meeting the second preset temperature range choose meet second preset condition gear be it is described from Recommendation gear under regeneration mode, second preset condition are that delivery temperature is in the second preset temperature range situation Lower and oil consumption is minimum or oil consumption in a minimum situation and delivery temperature is closest to second central temperature.
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