CN100447379C - Exhaust purification apparatus and method - Google Patents
Exhaust purification apparatus and method Download PDFInfo
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- CN100447379C CN100447379C CNB2006101719474A CN200610171947A CN100447379C CN 100447379 C CN100447379 C CN 100447379C CN B2006101719474 A CNB2006101719474 A CN B2006101719474A CN 200610171947 A CN200610171947 A CN 200610171947A CN 100447379 C CN100447379 C CN 100447379C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The present invention provides an exhaust purification method that avoids any detrimental effects on filter durability, even in cases where service using service tools is not available when the engine controller is replaced. An exhaust purification apparatus has an engine controller with a storage device that stores information determining whether it is the time for regeneration of the filter. The exhaust purification apparatus carries out a regeneration process of the filter based on the information stored in the storage device when the time for regeneration of the filter has been reached. The exhaust purification apparatus also determines whether an engine operation is taking place for the first time following replacement of the engine controller, and then forcibly carries out the regeneration process of the filter upon determining that engine operation is taking place for the first time following replacement of the engine controller.
Description
Technical field
The present invention relates to a kind of exhaust gas-cleaning method and Exhaust gas purifying device, particularly about the filter recovery process of the particle in the exhaust that captures diesel engine.
Background technique
In order to collect the particulate material of discharging from diesel engine and to prevent the discharging of particulate material to atmosphere, known technology is on the exhaust passageway of diesel engine particle filter to be set.Though this particle filter can be piled up the particulate material of discharging in the engine running,, the tolerance of this stackable particulate material is limited.Therefore, generally speaking, when the particulate material of piling up reaches the value that is equivalent to tolerance, the temperature of particle filter is raise, burning removes the particulate material of depalletizing, finishes the regeneration of filter.
Summary of the invention
Yet, in the diesel engine that is equipped with the filter that has captured the particle in the exhaust, information (for example accumulating amount of particle or operation process etc.) during with the regeneration period that judges whether to be in filter, the mode that also can not lose after stopping with engine running is stored among the EEPROM (storage device) in the engine controlling unit.
In this case, when the engine controlling unit that will be provided with storage device was replaced with new part, above-mentioned information may be lost.Thereby, in the new engine control gear after being replaced, regard the situation of on filter, not piling up particulate material as and begin control.In other words, if when changing engine controlling unit, piling up on the filter has particle, and this build-up of particles part will produce error.Thereby when changing engine controlling unit, the particle that is deposited on the filter is kept intact, and then when new engine controlling unit is judged to be the regeneration period that is in filter, consider to have piled up too much on the filter particle.
Therefore, after engine controlling unit is replaced with new part, originally, when being in the regeneration period of filter, according to the mode of not piling up particle on the filter excessively, when the replacing of engine controlling unit, carry out the Regeneration Treatment of filter forcibly, must remove (regeneration) particle from the last burning of filter.For this reason, in the past, dealer (shop) or serve in the factory when changing engine controlling unit, use the service aid of regulation, carried out the Regeneration Treatment of filter forcibly.
But, because region or dealer's etc. the environment fact is without access to the service of using above-mentioned service aid sometimes.In this case, when the replacing of engine controlling unit, particle arranged, in the engine controlling unit after being replaced, also can regard the situation that does not have build-up of particles on the filter as and begin control even pile up on the filter.Thereby, when being judged to be the regeneration period of the primary filter after being in being replaced of engine controlling unit, on filter, might pile up the particle that surpasses admissible value, during the Regeneration Treatment of the primary filter after being replaced of such engine controlling unit, in the burning of the particle that surpasses admissible value, can damage the durability of filter.
Therefore, the objective of the invention is, provide a kind of when the replacing of engine controlling unit,, also do not damage the exhaust gas-cleaning method and the Exhaust gas purifying device of the durability of filter even be without access under the situation of the service of using service aid.
The present invention is applicable to Exhaust gas purifying device, and this Exhaust gas purifying device is inferred the particle trapping amount that is deposited on the particle filter, when the amount of collected of inferring becomes established amount, heats up by making particle filter, makes the particle regeneration of accumulation.
Determination processing step during first engine running after engine controlling unit has judgement and whether is in engine controlling unit itself and is replaced.According to this determination processing step, under the situation when the first engine running that is judged to be after being in engine controlling unit and being replaced, even the particle trapping amount below established amount, is also carried out particle filter regeneration.
First aspect present invention provides a kind of exhaust gas-cleaning method, it is in Exhaust gas purifying device, by infer the particle trapping amount that is piled up on the particle filter, when the amount of collected of inferring becomes established amount, and particle filter is heated up, make the particle regeneration of accumulation, it is characterized in that, comprising: the determination processing step, it judges the first engine running after whether engine controlling unit is in engine controlling unit itself and is replaced; Treatment step is carried out in regeneration, under its situation when the first engine running that is judged to be after being in engine controlling unit and being replaced, even described particle trapping amount below established amount, also will be regenerated to described particle filter.
Second aspect present invention provides a kind of Exhaust gas purifying device, in Exhaust gas purifying device, its by infer the particle trapping amount that is piled up on the particle filter, when the amount of collected of inferring becomes established amount, and particle filter is heated up, make the particle regeneration of accumulation, it is characterized in that, comprising: the determination processing device, when it judges the first engine running of engine controlling unit after whether being in engine controlling unit itself and being replaced; The regeneration actuating device is under its situation when described decision maker is judged to be first engine running after being in engine controlling unit and being replaced, even described particle trapping amount below established amount, also will be regenerated to described particle filter.
According to the present invention, during the first engine running after if engine controlling unit is judged to be and is in engine controlling unit itself and is replaced, owing to carry out the Regeneration Treatment of filter, therefore, when the replacing of engine controlling unit, even be without access under the situation of the service of using service aid, during the Regeneration Treatment of the primary filter after engine controlling unit is replaced, can not burn above the particle of admissible value, can prevent to damage the durability of filter.
Description of drawings
Fig. 1 is the summary pie graph of expression an embodiment of the present invention;
Fig. 2 is the system diagram that is used to illustrate the analog input value;
Fig. 3 is used to illustrate flow chart when engine controlling unit is replaced with first engine running behind the new part, the filter forcible recovery process;
Fig. 4 is the summary pie graph of mobile suppressor.
Embodiment
Based on accompanying drawing form of implementation of the present invention is described below.
Fig. 1 is the summary pie graph of expression an embodiment of the present invention.
In Fig. 1, the 1st, diesel engine.On the EGR path 4 of the 3a of condensing funnel portion that connects exhaust passageway 2 and inlet air pathway 3, have the diaphragm type EGR valve 6 of response from the pilot pressure of pressure controlled valve (not shown).Pressure controlled valve is driven by the load control signal from engine controlling unit 31.Whereby, the regulation EGR that draws corresponding to operating condition leads.In addition, the driving mode of EGR valve 6 is not limited to this, can also be driven by stepper motor.
On motor 1, have common rail (コ モ Application レ one Le) formula fuel injection system 10.This fuel injection system 10 is mainly by fuel tank (not shown), low pressure pump (not shown), high voltage supply pump 14, rail (pressure accumulating chamber) 16 and the sparger 17 that is arranged on each cylinder constitute altogether.To once save in being total to rail 16 by the fuel of high voltage supply pump 14 pressurizations.In order to be total to the pressure that rail 16 interior fuel pressures are controlled at hope, the fuel of high voltage supply pump 14 necessary force feed requirements.For this reason, be provided with a linear electromagnetic coil intake control valve, by changing the area of suction port, control is to the fuel feed of plunger compartment.
Should be total to the sparger 17 of each cylinder of high-pressure fuel of rail 16.In addition, drive sparger 17 by driving valve, the fuel under high pressure that directly will be total in the rail 16 is ejected in the cylinder barrel of each cylinder.
Sparger 17 by electromagnetic coil, Twoway valves, outlet throttling hole, inlet restriction hole, control piston, and valve needle etc. constitute.Under the state of not switching on to electromagnetic coil, push Twoway valves downwards by elastic force, make the outlet throttle orifice be in closed condition.Thereby when downward pushing control piston, the control room pressure of control piston upper end is identical with the pressure that upwards pushes valve needle, when compression area not simultaneously, by the elastic force effect, valve needle and seat portion touch, and keep the valve closed condition, do not carry out the fuel injection.
When beginning to switch on to electromagnetic coil, the attraction force by electromagnetic coil upwards promotes Twoway valves.Thus, open the outlet throttling hole, the fuel in control room is flowed out upward.When fuel flowed out, the control room pressure of control piston effect downwards descended relatively.Thereby control piston and valve needle rise, and begin the injection of fuel by spray orifice.When further continuing energising to electromagnetic coil, valve needle reaches maximum lift, is in the state of maximum injection rate.
On the other hand, when the energising cut off to electromagnetic coil, Twoway valves descends, and closes the outlet throttling hole.Thereby fuel to the control room, rises control room pressure from the inlet restriction orifice flow.Thereby valve needle sharply descends, and portion touches with seat.Afterwards, close spray orifice, finish fuel and spray.
Thereby, control the fuel injection timing period according to energising, according to control fuel injection amount to the current"on"time of electromagnetic coil to electromagnetic coil.Cut off by energising, the energising in a circulation, repeatedly carried out repeatedly to this electromagnetic coil, can realize multi-stage jet.So-called multi-stage jet is meant prior to the pilot injection of main injection and the post-injection of carrying out behind main injection etc.
On the exhaust passageway 2 in the opening portion downstream of EGR path 4, have variable capacity turbocharger 21, this variable capacity turbocharger 21 is with turbine 22 and compressor 23 coaxial linking together, and turbine 22 is transformed to energy of rotation with the heat energy of exhaust, and 23 pairs of air inlets of compressor are compressed.In the volute ingress of turbine 22, be provided with the variable-nozzle 24 (variable displacement mechanism) that drives by actuator 25.In addition, engine controlling unit 31 is in low rotational speed side, in order to improve the exhaust flow velocity that imports turbine 22, the nozzle aperture of variable-nozzle 24 is controlled at deflected condition.Whereby, the boost pressure that obtains stipulating from low rotational speed territory.On the other hand, in high rotation speed one side,, the nozzle aperture is controlled at full-gear for exhaust non-resistance ground is imported in the turbine 22.
Above-mentioned actuator 25 drives the barrier film actuator 26 of variable-nozzle 26 by the response pilot pressure and the pressure controlled valve 27 that the pilot pressure that feeds to this barrier film actuator 26 is adjusted is constituted.In addition,, create load control signal, this load control signal is exported to pressure controlled valve 27 so that the actual aperture of variable-nozzle 24 becomes the mode of target nozzle aperture.
In condensing funnel 3a ingress, be provided with the intake-air throttle valve 42 that drives by actuator 43.Above-mentioned actuator 43 drives the barrier film actuator 44 of intake-air throttle valve 42 by the response pilot pressure and the pressure controlled valve 45 that the pilot pressure that feeds to this barrier film actuator 44 is adjusted is constituted.In addition,, create load control signal, this load control signal is exported to pressure controlled valve 45 intake-air throttle valve 42 is closed to the mode of target aperture.
31 inputs of this engine controlling unit are from the accelerator opening (amount of entering into of accelerator pedal) of accelerator sensor 32, from the engine rotary speed of crank angle sensor 33, from the coolant water temperature of cooling-water temperature sensor 34 and from the various signals of the suction air quantity of airflow meter 35.In addition, in engine controlling unit 31,, calculate fuel injection timing and fuel injection amount, the corresponding therewith valve command signal of opening is exported to sparger 17 according to engine load (accelerator opening etc.) and engine rotary speed.
In addition, in engine controlling unit 31,, calculate target common rail fuel pressure according to engine load and engine rotary speed, control above-mentioned intake control valve, the common rail 16 interior actual fuel pressures that pressure transducer is detected are consistent with the target common rail fuel pressure of being calculated.In addition, in engine controlling unit 31, coordinate to carry out EGR control and pressurization control, target EGR leads and the target supercharging to obtain.
In addition, engine controlling unit 31 is made of microcomputer, and this microcomputer is by central processing unit (CPU), read-only private memory (ROM), storage reservoir (RAM) and input/output interface (I/O interface) constitute at random.
Exhaust passageway 2 is provided with the filter 41 that captures particle in the exhaust.When the build-up of particles amount of filter 41 reaches specified value (threshold value), the Regeneration Treatment of beginning filter, the particle that is deposited on the filter 41 is removed in burning.
The pressure loss (pressure difference in filter 41 upstreams and downstream) in order to detect filter 41 is provided with differential pressure pickup 36 to the pressure differential detection path of filter 41 bypass.
By the pressure loss Δ P of differential pressure pickup 36 detected filters 41, with from the filter inlet temperature T 1 of temperature transducer 37, flow to engine controlling unit 31 from the filter outlet temperature T 2 of temperature transducer 38.In engine controlling unit 31, when becoming the regeneration period of filter 41,, utilize known exhaust gas temperature increasingmeans (for example excess air ratio being controlled near the device that is worth the smog boundary) based on these data, filter 41 is warmed up to target temperature, carries out the Regeneration Treatment of filter 41.
On the other hand, under the situation of remove all particles that is deposited on the filter 41 in burning, carrying out holomorphosis, when Regeneration Treatment, in the scope of the permissible temperature that is no more than filter 41, must improve the combustion temperature of particle at least.Consider these factors, in this form of implementation, be coated with oxidation catalyst on the carrier of formation filter 41.Utilize this oxidation catalyst, the oxidation reaction when having promoted combustion particles makes the base temperature of this part filter 41 rise in fact, has promoted the burning of the particle of filter 41.
To carry the filter 41 of this oxidation catalyst as object, in engine controlling unit 31, detect the base temperature T bed of filter 41, with this detected base temperature become more than the target base temperature T x during as te during the effective regeneration, perform calculations.In addition, based on te during this effective regeneration, infer the particle regeneration amount PMr of the particle burning amount of removing that is deposited on the filter 41, particle regeneration amount PMr calculation particle regeneration efficiency η PM by this deduction, according to the particle regeneration efficiency η PM of this calculation, set and improve target inlet temperature Td (with reference to Japanese patent application: the spy opens the 2005-201251 communique).
In addition, the method for the Regeneration Treatment of filter 41 is not limited to said method, can also use known regeneration treating method.
In addition, in the diesel engine that is equipped with the filter 41 that captures the particle in the exhaust, information (for example build-up of particles amount or operation process etc.) when judging whether the regeneration period for filter 41, be stored among the EEPROM (storage device) in the engine controlling unit 31, even after engine running stops, also can not losing.
In this case, during with new unit replacement, above-mentioned information may be lost with the engine controlling unit 31 that is provided with storage device.Therefore, in the new engine control gear, can regard as do not pile up the situation of particle on the filter 41 and begin control.In other words, when changing engine controlling unit 31, if pile up particle is arranged on filter 41, the accumulation part of this particle will produce error.Thereby, when changing engine controlling unit 31, if the particle that is deposited on the filter 41 is kept intact, when new engine controlling unit 31 is judged to be the regeneration period of filter 41, will consider exceedingly to have piled up on the filter 41 fact of particle.
Therefore, after engine controlling unit 31 is replaced with new part, originally, when being the regeneration period of filter 41, when the replacing of engine controlling unit 31, carry out the Regeneration Treatment of filter 41 forcibly, make on the filter 41 and can exceedingly not pile up particle, be necessary to remove (regeneration) particle from filter 41 primary combustions.For this reason, in the past, dealer (shop) or serve in the factory when changing engine controlling unit 31, use the service aid of regulation, carried out the Regeneration Treatment of filter forcibly.
But,, be without access to the service of using above-mentioned service aid sometimes according to region or dealer's etc. environment.In this case, when the replacing of engine controlling unit 31, particle arranged, in the engine controlling unit 31 after being replaced, also can regard as and not pile up the situation of particle on the filter 41 and begin control even pile up on the filter 41.Like this, the engine controlling unit 31 after being replaced after being replaced of engine controlling unit 31, originally, when being judged to be the regeneration period of filter 41, might piled up the particle that surpasses admissible value on filter 41.In addition, during the regeneration period of the primary filter 41 that after such engine controlling unit 31 is replaced, carries out, owing to piling up the particle that surpasses admissible value on the filter 41, so, in process, might damage the durability of filter 41 because of abnormal combustion to its burning.
Therefore, in the present invention, when judging the first engine running after whether be in engine controlling unit 31 is replaced, under the situation when being judged to be the first engine running that is in after engine controlling unit 31 is replaced, force to carry out the Regeneration Treatment of filter 41.
In this case, during first engine running after whether being in engine controlling unit 31 and being replaced, judge in the following manner.In other words, under the situation that has mobile suppressor (イ モ PVC ラ イ ザ one), when engine running began, engine controlling unit 31 judged that whether carrying out first identifying code writes.In addition, carry out according to this result of determination under the situation that first identifying code writes, when being judged to be the first engine running after being in engine controlling unit 31 and being replaced at engine controlling unit 31.
Relative therewith, under the situation that mobile suppressor is not set, can judge in the following manner.With sick engine control gear 31 under the situation that the engine controlling unit 31 that other vehicles use is changed, the analogue value that is stored in EEPROM is the employed value of other vehicles.Thereby the analogue value of current new input is because of the difference of vehicle, and the analogue value that nature is stored is just inequality.So, by relatively being stored in the analogue value and other regional analogues value that are stored in EEPROM of newly importing specifically among the EEPROM, can determining the situation of engine controlling unit 31 replacings that sick engine control gear 31 and other vehicles are used.In like manner, also can judge situation about changing with second hand goods.
Specifically, as shown in Figure 2, with 10 kinds of analogues value that are input in the engine controlling unit 31, the analogue value during according to engine running is not last time lost the mode of this value yet after engine running stops, and is stored among the EEPROM (storage device) in the engine controlling unit 31.The multiple analogue value of input compared when the multiple analogue value during in addition, with the last time engine running that is stored in this EEPROM and engine running began.Relatively the time, the analogue value that more same kind.
According to this comparative result, judge in the middle of a plurality of analogues value be stored among the EEPROM, have several analogues value different with the analogue value of importing specifically.Under the number of the kind of judged result, the different analogue value is situation more than the threshold value, when being judged to be the first engine running after being in engine controlling unit 31 and being replaced.
In addition, when engine running begins, under the situation of the analogue value when in EEPROM, not storing engine running last time, because it is different with other regional analogues value that are stored in EEPROM specifically to judge the multiple analogue value that is stored among the EEPROM, when therefore, being judged to be first engine running after being in engine controlling unit 31 and being replaced.
As shown in Figure 2, be input to shown in the analog input value following (1)～(10) in the engine controlling unit 31.The analog input value is respectively by following sensor, and these sensors comprise: the sensor 51 that detects the full cut-off point position of different EGR valves 6; Detect the sensor 52 of the standard-sized sheet point position of EGR valve 6; Detect the sensor 53 of the full cut-off point position of the 1st accelerator sensor; Detect the sensor 54 of the full cut-off point position of the 2nd accelerator sensor; Detect the sensor 55 of the full cut-off point position of intake-air throttle valve 42; Detect the sensor 56 of the standard-sized sheet point position of intake-air throttle valve 42; Detect the sensor 57 of the cylinder barrel machine error revisal resistance value of the 1st cylinder injector; Detect the sensor 58 of the cylinder barrel machine error revisal resistance value of the 2nd cylinder injector; Detect the sensor 59 of the cylinder barrel machine error revisal resistance value of the 3rd cylinder injector; And the sensor 60 that detects the cylinder barrel machine error revisal resistance value of the 4th cylinder injector.
(1) the full cut-off point position of EGR valve 6;
(2) the standard-sized sheet point position of EGR valve 6;
The full cut-off point position of (3) the 1st accelerators;
The full cut-off point position of (4) the 2nd accelerators;
(5) the full cut-off point position of intake-air throttle valve 42;
(6) the standard-sized sheet point position of intake-air throttle valve 42;
The cylinder barrel machine error revisal resistance value of (7) the 1st cylinder injector;
The cylinder barrel machine error revisal resistance value of (8) the 2nd cylinder injector;
The cylinder barrel machine error revisal resistance value of (9) the 3rd cylinder injector
The cylinder barrel machine error revisal resistance value of (10) the 4th cylinder injector.
These 10 analog input values, enumerate according to the motor individual difference produce in a way deviation or the example of the value of timeliness deterioration; Perhaps according to the individual difference of parts such as EGR valve 6, accelerator pedal, intake-air throttle valve 42, sparger 17 produce in a way deviation or the example of the value of timeliness deterioration.
For example, the full close position of the accelerator sensor of so-called above-mentioned (3), (4) is meant the position of accelerator pedal when will speed up pedal steps on earth.Because this accelerator pedal position is mechanically to determine, so according to the individual difference of accelerator pedal parts, the sensor output voltage value can produce deviation to a certain degree.Similarly, full cut-off point position, the standard-sized sheet point position of the intake-air throttle valve 42 of the full cut-off point position of above-mentioned (1), (2) EGR valve 6, standard-sized sheet point position or above-mentioned (5), (6) also is mechanically to determine, therefore, also can on the sensor output voltage value, produce deviation to a certain degree because of the individual difference of EGR valve member, air inlet restriction valve member.In addition, the full cut-off point position of accelerator sensor has 2 reason to be, for 2 accelerator sensors 32, considers the reason of secure context, sets 2 system sensors.
For the individual deviation of sparger 17 fuel injection characteristic is one by one carried out revisal, above-mentioned electromagnetic coil is connected in advance the impedance of regulation.The cylinder barrel machine error revisal resistance value of the sparger 17 of so-called above-mentioned (7)～(10) is meant, along with the individual difference of this sparger 17 is carried out revisal to the deviation of the fuel injection amount between the cylinder, identical and connect the resistance value of above-mentioned impedance in order to make fuel injection amount between the cylinder.In this form of implementation, owing to be object with the four cylinder engine, thereby the cylinder barrel machine error revisal resistance value of sparger 17 is 4.
In addition, in the analog input value in order to carry out self diagnosis owing to had the value that is input in the engine controlling unit 31, thereby, in this case, there is no need to change, be provided with sensor.
Below, based on the flow chart of Fig. 3, describe this control that engine controlling unit 31 is carried out in detail.
The flow process of Fig. 3, is implemented when promptly current engine running begins when OFF becomes ON at the ignition key switch.In addition, flow process has been represented operating process, is not that each certain hour carries out repeatedly.
In step 1, read motor and whether be provided with mobile suppressor.Owing to whether be provided with in the ROM of data storage in engine controlling unit 31 of mobile suppressor, so it is just passable to read this information.
If be provided with mobile suppressor, then enter step 11, read compulsory Regeneration Treatment sign.Sign when this sign is the Regeneration Treatment of enforcement described later filter 41 when changing first engine running behind the engine controlling unit 31, forcible recovery process sign=1.Current, if forcible recovery process sign=0 o'clock enters step 12, whether what read identifying code is first to writing of engine controlling unit 31.
Here, mobile suppressor is opened the structure that flat 8-244558 communique is put down in writing as (Japanese patent application) spy, briefly, constitutes the structure of Fig. 4.That is,, vehicle moved forbid linking together with control gear 71 and engine controlling unit 31 by bidirectional communication apparatus 72.Vehicle moves to be forbidden being provided with wireless forwarding switch 74 with control gear 71, move from vehicle by antenna 73 and to forbid carrying electromagnetic waves (or electric wave) and when calling out with control gear 71, the intrinsic electronics sign indicating number of wireless forwarding switch 74 conveyings with wireless forwarding switch 74.In addition, move to forbid whether the sign indicating number that keeps with control gear 71 is consistent with vehicle, can confirm that wireless forwarding switch 74 and vehicle move the combination correctness of forbidding with control gear 71 by reading this yard.Forbid replacing with control gear 71 even removing vehicle moves, the vehicle of other vehicles moves and forbids using control gear in the assembling; Perhaps vehicle moves the wireless forwarding switch of forbidding having with control gear 71 other vehicles that keep original, and vehicle moves to be forbidden being false with the control gear 71 and the communication condition of engine controlling unit 31.That is to say, forbid setting up, must hold wireless forwarding switch 74 with the communication condition between control gear 71 and the engine controlling unit 31 for vehicle is moved.
In addition, the ignition key switch from OFF when ON switches, the contrast vehicle moves to be forbidden with the identifying code of control gear 71 storage and the identifying code of engine controlling unit 31 storages.If results of comparison is consistent, allow engine start, still,, then forbid engine start (promptly stoping vehicle to set out) if results of comparison is inconsistent.Further, when motor stops, vehicle is moved the identifying code of forbidding with the identifying code and the engine controlling unit 31 of control gear 71 storages are stored be updated to other sign indicating numbers.
On the other hand, when engine controlling unit 31 faults, engine controlling unit 31 and vehicle moved forbid changing integratedly with control gear 71 (for wireless forwarding switch 74 too), relative two control gear 31,71 carry out writing for the first time of identifying code.This writes for the first time is writing for the first time in the step 12.
In step 12, when identifying code be written as write for the first time fashionable, when engine controlling unit 31 is the first engine start that is replaced with behind the new part when engine running (first).That is to say, be judged as and lost data (information when judging whether to be in the regeneration period of filter 41), enter step 7, the beacon 62 that is arranged on the indoor running panel of car lit a lamp, impel the driver to carry out the running of filter 41 Regeneration Treatment.
Here, the reason of impelling the driver to carry out the Regeneration Treatment running of filter 41 is to force to carry out the Regeneration Treatment of filter 41.The method of the Regeneration Treatment of filter 41 is carried out in pressure, considers following three kinds of methods:
(a) beacon 62 that is arranged on the indoor running panel of car is lit a lamp, and impels the driver to carry out the method for filter 41 Regeneration Treatment running;
(b) impel the driver to push to be arranged on the method for the regeneration operating switch on the indoor running panel of car;
(c) make engine controlling unit 31 action, automatically force to carry out the method for the Regeneration Treatment of filter 41,
The flow process of Fig. 3 there is shown (a) method.
After impelling the driver to carry out the Regeneration Treatment running of filter 41, whether the Regeneration Treatment running of reading filter 41 in step 8 finishes (termination).For example, if when the pressure loss Δ P of the filter 41 that differential pressure pickup 36 detects surpasses specified value, standby still.Accept lighting a lamp of above-mentioned beacon 62, if the driver carries out running at high speed of vehicle continuously with the stipulated time, because the pressure loss Δ P of filter 41 is below the specified value, thereby, at this moment the Regeneration Treatment that is judged as filter 41 forces running to finish, and enters step 9, and beacon 62 is turned off the light.
On the other hand, under the situation of above-mentioned (b), (c) method, carry out the Regeneration Treatment pressure running of filter 41 forcibly by engine controlling unit 31 with the stipulated time.In this case, because replacing by engine controlling unit 31, information in the time of can losing the regeneration period that judges whether to be in filter 41, thereby, for example, regard particle as and on filter 41, be stacked into the situation that allows boundary, remove the time (desired value) of the build-up of particles amount of this permission boundary in whole burnings.The Regeneration Treatment running of filter 41 is carried out in pressure.Whereby, filter 41 turns back to the A-stage of not piling up particle.
Like this, because engine controlling unit 31 Regeneration Treatment when being replaced with first engine running behind the new part, filter 41 forces running to finish, so, in step 10, forcible recovery process sign=1.The value of this forcible recovery process sign is stored among the EEPROM in the engine controlling unit 31 so that motor stop after this value do not disappear.
According to forcible recovery process sign=1, if next engine running does not carry out the replacing of engine controlling unit 31 later on, then in step 11, according to forcible recovery process sign=1, the end of keeping intact.On the other hand,, change engine controlling unit 31 once more, then in step 11,, enter step 12, carry out above-mentioned operation repeatedly according to forcible recovery process sign=0 if after the running of next motor.
On the other hand, in step 1, be judged as under the situation that mobile suppressor is not set, enter step 2, identical with step 11, read the forcible recovery process sign.Here, also be when forcible recovery process sign=0, enter step 3, the analog input value of sampling when reading current engine running and beginning.In step 4, read last time the analog input value during engine running whether store among the EEPROM in the engine controlling unit 31.Here, if will be last time analog input value during engine running store among the EEPROM in the engine controlling unit 31, whether then enter step 5, it is the same to read the analog input value of current running when beginning the analog input value of time sampling with engine running last time.
Here, analog input value is meant 10 analogues value (sensor output voltage value) of above-mentioned (1)～(10) that utilize sensor 51～60 detections.
In step 5, whole values for these 10 analog input values, if the difference of the analog input value of the analog input value when current engine running begins during with engine running last time is in the allowed band, the motor that power supply became OFF when engine controlling unit 31 was discerned engine running last time makes power supply become ON once more for current running.In other words, be judged to be and do not change engine controlling unit 31, the end of keeping intact.
On the other hand, if engine controlling unit 31 is replaced by new part, since not have will be last time analog input value during engine running be stored among the interior EEPROM of the engine controlling unit 31 of new part, so the difference of the analog input value of the analog input value when current engine running begins during with engine running last time is not in allowed band.In other words, the difference of the analog input value of the analog input value when beginning according to current engine running during with engine running last time is not in the situation in the allowed band, during first engine running after engine controlling unit 31 is judged to be and is in engine controlling unit 31 and is replaced.
Yet for example because the part replacement of EGR valve 6, accelerator pedal, intake-air throttle valve 42 etc., the difference of the analog input value of the analog input value when current engine running is begun during with engine running last time can not be in the allowed band yet.So, in order to distinguish both, promptly whether judgement produces misinterpretation when avoiding the first engine running after engine controlling unit 31 is replaced, when the difference of the analog input value of the analog input value when current engine running begins during with engine running last time is not in the allowed band, enter step 6 from step 5.
Here, for 10 analog input values, because value and last time value during engine running of more current engine running when beginning, so, value when current engine running begins and last time the difference of the value during engine running be not under the situation of allowed band, should consider 10 situations of following (situation 1)～(situation 10) in theory, no matter be any situation, all enter step 6
(situation 1) for an analog input value, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 2) for 2 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 3) for 3 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 4) for 4 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 5) for 5 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 6) for 6 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 7) for 7 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 8) for 8 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 9) for 9 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band;
(situation 10) for whole values of 10 analog input values, the value during current engine start and last time the difference of the value during engine running be not in the situation of allowed band.
In step 6, value during with current engine start and last time the difference of the value during engine running be not in the number of analog input value of allowed band and threshold ratio, if the value during current engine start and last time the difference of the value the during engine running number that is not in the analog input value of allowed band be threshold value when above, when then being judged as the first engine running after being in engine controlling unit 31 and being replaced.Enter after the step 7.Relative therewith, if the value during current engine start and when last time the difference of the value the during engine running number that is not in the analog input value of allowed band did not reach threshold value then is judged as and does not change engine controlling unit 31, the end of keeping intact.
Here, threshold value is the number more than at least 2.Threshold value is not that 1 reason is, according to new part fault etc., carries out under the situation of part replacement till to engine running last time the time, if when not changing engine controlling unit 31, prevents from that mistake is judged to be to have changed engine controlling unit 31.For example, according to unit failure etc., when changing parts in EGR valve 6, accelerator pedal, the intake-air throttle valve 42, when not changing engine controlling unit 31, above-mentioned (situation 1) set up.In this case, if threshold value is 1, just might be judged to be mistakenly and have changed engine controlling unit 31.
Consider these aspects, if will set just passable as threshold value greater than the value of setting up resulting number because of part replacement in above-mentioned 10 situations.Like this, in part replacement, owing to can not once change the parts more than 5 of analog input, so,, set the threshold to 5 here.In fact during setting threshold, must consider to carry the design or the component tolerance of the vehicle of motor, consider to adopt different values according to car type.
Thereby, the number of different analog input values is under the situation of any one value of 1,2,3,4 during with engine running last time when current engine start, because analog input value different during with engine running last time during engine start, not owing to do not carry out the replacing of engine controlling unit 31, being judged to be is because the part replacement that unit failure etc. causes, the end of keeping intact.In addition, when current engine start during with engine running last time the number of different analog input values be under 0 the situation, also to be judged as and not change engine controlling unit 31, the end of keeping intact.
The number of different analog input values is under 5,6,7,8,9,10 any one situation during with engine running last time when current engine start, analog input value during current engine start during different with engine running last time, be because of having changed engine controlling unit 31, in other words, when being judged as the first engine running after being in engine controlling unit 31 and being replaced, the Regeneration Treatment of filter 41 is carried out in the operation of execution in step 7～9 forcibly.
On the other hand, in step 4, do not have will be last time analog input value during engine running be stored under the situation among the EEPROM in the engine controlling unit 31, when also being judged as the first engine running after being in engine controlling unit 31 and being replaced.Then, cross step 5,6, enter step 7～9, the operation of execution in step 7～9, the Regeneration Treatment of filter 41 is carried out in pressure.
Therefore, under the situation that mobile suppressor is not set, because engine controlling unit 31 Regeneration Treatment when being replaced with first engine running behind the new part, filter 41 forces running to finish, so, in step 10, forcible recovery process sign=1.The value of this forcible recovery process sign is stored among the EEPROM in the engine controlling unit 31 so that motor stop after this value less than disappearance.
According to forcible recovery process sign=1, if next engine running does not carry out the replacing of engine controlling unit 31 later on, then in step 2, according to forcible recovery process sign=1, the end of keeping intact.On the other hand,, change engine controlling unit 31 once more, then in step 2,, enter after the step 3, carry out above-mentioned operation repeatedly according to forcible recovery process sign=0 if after the running of next motor.
In this form of implementation, though with situation about judging whole 10 situation of the example of analog input value has been described,, be not limited to this, the several judgements in 10 of the analog input values also are fine.The number of the analog input value that reality is judged is set at several, is the desired value of having considered to carry on the basis of the design of vehicle of motor or component tolerance.
Here, the action effect to this form of implementation describes.
According to this form of implementation, whether determination processing step when engine controlling unit has the first engine running of judging after be in engine controlling unit itself is replaced.According to this determination processing step, under the situation when the first engine running that is judged to be after being in engine controlling unit and being replaced (with reference to the step 1 of Fig. 3,12 or step 1,3,4,5,6), even the particle trapping amount is below the established amount, also will regenerate (with reference to the step 7,8,9 of Fig. 3) to particle filter.Whereby, even when the replacing of engine controlling unit 31, be without access under the situation of the service of using service aid, during the Regeneration Treatment of the primary filter 41 after being replaced of engine controlling unit 31, can not burn above the particle of permitted value, can avoid damage the durability of filter 41.
In addition, use under the situation of service aid service even enjoyed when the replacing of engine controlling unit 31, also not needing the worker is that the Regeneration Treatment of carrying out filter 41 is disposed especially, can cut down the operation of following engine controlling unit 31 to change.
According to this form of implementation, owing to have mobile suppressor, this mobile suppressor only moves under yard consistent situation of forbidding keeping with engine controlling unit with vehicle at the intrinsic electronics sign indicating number of wireless repeater-transmitter, the communication condition of itself and engine controlling unit is set up, under the situation that communication condition is set up, above-mentioned vehicle is moved the identifying code of forbidding with engine controlling unit and above-mentioned engine controlling unit are held respectively to be contrasted, only under the situation of identifying code unanimity, allow engine start, the determination processing step, when it begins at engine running, whether judgement is first (with reference to the step 1 of Fig. 3 to the writing of identifying code of engine controlling unit 31,12), draw to being written as under the first situation of the identifying code of engine controlling unit 31 in result of determination, when being judged to be the first engine running after being in engine controlling unit 31 and being replaced (with reference to the step 1 of Fig. 3,19,7～9).In addition, if having mobile suppressor, in the time of then can being judged to be the first engine running after being in engine controlling unit 31 and being replaced.
According to this form of implementation, a plurality of analogues value that the determination processing step will input to engine controlling unit 31 are stored among the EEPROM (storage device) in the engine controlling unit 31, the multiple analog input value of the current new input when beginning of the multiple analog input value during with the last time engine running that is stored among this EEPROM as engine running and last time the analog input value during engine running be that the analog input value of identical type compares (with reference to the step 1,3,5 of Fig. 3).In addition, be under the different situation when when drawing last time the turning round of multiple analog input value according to this comparative result, beginning with engine running, kind number for different analog input values is counted, the kind number of different analog input values of counting and the threshold value of regulation are further compared (with reference to the step 6) of Fig. 3, under the kind number that draws the input of the different analogues value from this comparative result is situation more than the threshold value, when being judged to be the first engine running after being in engine controlling unit 31 and being replaced (with reference to the step 6,7～9 of Fig. 3).Whereby, even without having mobile suppressor, in the time of also can determining the first engine running of engine controlling unit 31 after being replaced.
According to this form of implementation, under the situation that mobile suppressor is not set, with input to the multiple analog input value of engine controlling unit 31 and last time the multiple analog input value during engine running be stored among the EEPROM (storage device) of engine controlling unit 31, when engine running begins, will not be last time multiple analogue value during engine running be stored under the situation among this EEPROM, when being judged to be the first engine running after being in engine controlling unit 31 and being replaced (with reference to the step 1,3,4 of Fig. 3).Thus, even without having mobile suppressor, in the time of also can determining the first engine running of engine controlling unit 31 after being replaced.
Claims (9)
1. exhaust gas-cleaning method, its in Exhaust gas purifying device, by infer the particle trapping amount that is piled up on the particle filter, when the amount of collected of inferring becomes established amount, and particle filter is heated up, make the particle regeneration of accumulation, it is characterized in that, comprising:
The determination processing step, it judges the first engine running after whether engine controlling unit is in engine controlling unit itself and is replaced; And
Treatment step is carried out in regeneration, under its situation when the first engine running that is judged to be after being in engine controlling unit and being replaced, even described particle trapping amount below established amount, also will be regenerated to described particle filter.
2. exhaust gas-cleaning method according to claim 1 is characterized in that, also comprises:
Mobile suppressor, this mobile suppressor only moves under yard consistent situation of forbidding keeping with engine controlling unit with vehicle at the intrinsic electronics sign indicating number of wireless forwarding switch, the communication condition of itself and engine controlling unit is set up, under the situation that described communication condition is set up, described vehicle is moved the identifying code of forbidding with engine controlling unit and described engine controlling unit are held respectively to be contrasted, only under the situation of described identifying code unanimity, allow engine start
Described determination processing step, when engine running begins, whether judgement is first to the writing of described identifying code of described engine controlling unit, drawing from result of determination to being written as under the first situation of the identifying code of engine controlling unit, when being judged to be the first engine running after being in described engine controlling unit and being replaced.
3. exhaust gas-cleaning method according to claim 1 is characterized in that, described determination processing step comprises:
Storing step, its multiple analogue value that will input to described engine controlling unit are stored in the storage device that engine controlling unit has;
Comparison step, the analogue value when it is stored in last time engine running in this storage device when engine running is begun compares with the analogue value multiple analogue value, identical type of current new input; And
Counting step, it is counted for the kind number of the analogue value of Different Results for the result that the analogue value with described identical type compares,
The kind number of the analogue value of the Different Results that will count by described counting step and the threshold value of regulation further compare, under the kind number of the analogue value that draws Different Results from this comparative result is situation more than the threshold value, when being judged to be the first engine running after being in engine controlling unit and being replaced.
4. exhaust gas-cleaning method according to claim 1 is characterized in that, described determination processing step comprises:
The multiple analogue value that inputs to described engine controlling unit is stored in storing step in the storage device that engine controlling unit has,
When engine running begins, not last time the multiple analogue value during engine running be stored under the situation in the described storage device, when being judged to be the first engine running after being in described engine controlling unit and being replaced.
5. according to claim 3 or 4 described exhaust gas-cleaning methods, it is characterized in that, be input to the multiple analogue value in the described engine controlling unit and be the value that produces deviation or timeliness deterioration because of the individual difference of the individual difference XOR parts of motor.
6. Exhaust gas purifying device, in Exhaust gas purifying device, its by infer the particle trapping amount that is piled up on the particle filter, when the amount of collected of inferring becomes established amount, and particle filter is heated up, make the particle regeneration of accumulation, it is characterized in that, comprising:
The determination processing device is when it judges the first engine running of engine controlling unit after whether being in engine controlling unit itself and being replaced; And
The regeneration actuating device is under its situation when described decision maker is judged to be first engine running after being in engine controlling unit and being replaced, even described particle trapping amount below established amount, also will be regenerated to described particle filter.
7. Exhaust gas purifying device according to claim 6 is characterized in that, comprising:
Mobile suppressor, this mobile suppressor only moves under yard consistent situation of forbidding keeping with engine controlling unit with vehicle at the intrinsic electronics sign indicating number of wireless repeater-transmitter, the communication condition of itself and engine controlling unit is set up, under the situation that described communication condition is set up, described vehicle is moved the identifying code of forbidding with engine controlling unit and described engine controlling unit are held respectively to be contrasted, only under the situation of described identifying code unanimity, allow engine start
Described decision maker is when engine running begins, whether judgement is first to the writing of described identifying code of described engine controlling unit, draw to being written as under the first situation of the identifying code of engine controlling unit in result of determination, when being judged to be the first engine running after being in described engine controlling unit and being replaced.
8. Exhaust gas purifying device according to claim 6 is characterized in that, comprising: the multiple analogue value that will input to described engine controlling unit is stored in the storage device in the storage device that engine controlling unit has,
Analogue value when described decision maker will be stored in last time engine running in this storage device by described storage device when engine running begins compares with the analogue value multiple analogue value, identical type of current new input, under result that the analogue value with described identical type compares for the number of the analogue value kind of Different Results is situation more than the defined threshold, when being judged to be the first engine running after being in described engine controlling unit and being replaced.
9. Exhaust gas purifying device according to claim 6 is characterized in that, comprising: the multiple analogue value that will input to described engine controlling unit is stored in the storage device in the storage device that engine controlling unit has,
Described determination processing step is when engine running begins, described storage device not last time the multiple analogue value during engine running be stored under the situation in the described storage device, when being judged to be the first engine running after being in engine controlling unit and being replaced.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP322081/05 | 2005-11-07 | ||
| JP2005322081 | 2005-11-07 | ||
| JP237573/06 | 2006-09-01 |
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| CN100447379C true CN100447379C (en) | 2008-12-31 |
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| CNB2006101719474A Expired - Fee Related CN100447379C (en) | 2005-11-07 | 2006-11-07 | Exhaust purification apparatus and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5716586A (en) * | 1993-06-03 | 1998-02-10 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Exhaust gas purifier |
| WO2001027447A1 (en) * | 1999-10-08 | 2001-04-19 | Renault | Diagnostic method for an exhaust system of a combustion engine |
| EP1333165A1 (en) * | 2002-01-25 | 2003-08-06 | C.R.F. Società Consortile per Azioni | Method of determining the amount of particulate accumulated in a particulate filter |
| CN1500975A (en) * | 2002-11-13 | 2004-06-02 | 三菱扶桑卡客车公司 | Exhaust controlling device for engine |
| JP2005201251A (en) * | 2003-12-15 | 2005-07-28 | Nissan Motor Co Ltd | Exhaust emission control device |
-
2006
- 2006-11-07 CN CNB2006101719474A patent/CN100447379C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5716586A (en) * | 1993-06-03 | 1998-02-10 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Exhaust gas purifier |
| WO2001027447A1 (en) * | 1999-10-08 | 2001-04-19 | Renault | Diagnostic method for an exhaust system of a combustion engine |
| EP1333165A1 (en) * | 2002-01-25 | 2003-08-06 | C.R.F. Società Consortile per Azioni | Method of determining the amount of particulate accumulated in a particulate filter |
| CN1500975A (en) * | 2002-11-13 | 2004-06-02 | 三菱扶桑卡客车公司 | Exhaust controlling device for engine |
| JP2005201251A (en) * | 2003-12-15 | 2005-07-28 | Nissan Motor Co Ltd | Exhaust emission control device |
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| CN1966944A (en) | 2007-05-23 |
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