JPS6090913A - Apparatus for controlling particulate capturing filter regenerating means of diesel engine - Google Patents

Abstract

PURPOSE:To prevent degradation of engine performance, by judging whether regeneration of a particulate capturing filter was successful, and prohibiting filter regenerating operation temperarily in case that the regeneration was unsuccessful. CONSTITUTION:In operation of an engine 1, judgement is made from the difference of the output signals of pressure sensors 7A, 7B disposed on the opposite sides of a filter 3 for capturing particulates contained in exhaust gas whether the amount of particulates captured by the filter 3 has reached a prescribed value. Regeneration of the filter 3 is carried out by burning the particulates captured by th filter 3 by raising the temperature of exhaust gas through operation of a fuel increasing means 25 and an injection timing delaying means 31 which serve as a filter regenerating means. In regenerating the filter 3, the time passed for regeneration is measured, and if completion of regeneration is not detected even after passing of a predetermined time, judgement is made that regeneration of the filter was unsuccessful. In this case, operation of the filter regenerating means 25, 31 is prohibited for about 30min.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for regenerating a particulate collection filter in a diesel engine, and more particularly to a device for controlling this regeneration device.

Diesel engine exhaust gas contains particulates, which are flammable, fine carbonized compounds, and are the main cause of black smoke in the exhaust gas. These particulates spontaneously ignite and burn when the exhaust gas temperature reaches 500 to 600°C or higher when the vehicle is running at high speed and under high load. (occupying more than 90% of the time), it is released into the atmosphere as is.

However, since particulates are harmful to the human body, vehicles generally do not contain 411. A diesel particulate collection filter is installed in the air passage.

By the way, as this filter is used, it tends to collect particulates and block the exhaust passage, and in order to regenerate this filter, a device for re-burning the particulates is usually installed. For example, it is known that reburning can be carried out by using various burners, by retarding the injection pump, and by discharging exhaust gas containing large amounts of carbon monoxide compounds, which are activated by oxidation catalysts to make them highly combustible. There is.

Among these, the rear means has the advantage of not requiring a separate burner, etc., but it is only possible to obtain a regenerable exhaust gas temperature because the operating region It is impossible to reproduce data in the frequently used area Y (see FIG. 1).

Furthermore, as the injection timing is moved to the retard direction β (see figure fiS2), the temperature at the center of the oxidation catalyst in the exhaust passage, for example, increases as shown in figure 2 (along the broken line); The maximum output tends to decrease significantly along the line. In this case, in order to maintain the same output as the regeneration start IItf, it is necessary to significantly increase the accelerator lever opening θ, and this change in the accelerator lever opening will worsen the driving operability and reduce safety. There are also many dangers.

Therefore, it is possible to retard the injection pump and automatically increase the amount of fuel without changing the opening degree of the accelerator lever, that is, without the driver adjusting the amount of accelerator depression. In this method, if filter regeneration fails despite attempts to some extent, if filter regeneration is attempted further, this will result in a significant deterioration of enon performance.

In addition, since filter regeneration has not been completed, filter clogging I) may cause 71. Gas is not released smoothly,
There is also a possibility that the output of Ennon will be reduced.

The present invention aims to solve these problems, and is capable of re-burning particulates regardless of engine driving conditions and without deteriorating driveability. By compensating when filter regeneration fails, it is possible to prevent deterioration of engine performance and decrease in engine output.
An object of the present invention is to provide a control device for a particulate collection filter regeneration device in a diesel engine.

Therefore, the control device for the particulate collection filter regeneration device in a diesel engine of the present invention is a particulate collection filter that is disposed in the exhaust passage of the diesel engine and that collects particulates discharged from the combustion chamber of the diesel engine. A device comprising a filter and a filter regeneration means that operates to regenerate the particulate collection filter by burning the particulates when the particulate collection filter collects the particulates, 1. Check whether the regeneration of the particulate collection filter was successful or not! A discriminating means for determining IJ, and a disabling means for temporarily prohibiting the operation of the filter regeneration means when regeneration of the particulate collection filter is not successful based on the determination result of the other means. It is characterized by

Further, the control device for the particulate collection filter regeneration device in the diesel engine of the present invention is arranged in the first air passage of the diesel engine and collects particulates discharged from the combustion chamber of the diesel engine. Particulate collection filter and particulate filter 1
・In a filter regenerating means that operates to burn particulates when the particulates are collected in the collection filter to generate the above-mentioned particulate collection filter, a determining means for determining whether or not the particulate extraction filter has been successfully regenerated; and an operation of the filter regenerating means when the particulate collection filter is not successfully regenerated based on the determination result of the determining means. and a prohibition means for temporarily prohibiting the particulate collection filter, one end of which communicates with the upstream exhaust passage of the particulate collection filter installation position, and the other end of which When the operation of the filter regeneration means is prohibited by the operation of the exhaust passage downstream of the filter installation position or the bypass passage communicating with the atmosphere, the on-off valve installed in the bypass passage, and the prohibition means, the above-mentioned It is characterized by comprising a valve opening means for opening the on-off valve.

Hereinafter, embodiments of the present invention will be explained with reference to the drawings.
3 to 18 show a control device for a particulate collection filter regeneration device in a diesel engine as an embodiment of the present invention, FIG. 3 is a schematic configuration diagram thereof, and FIG. 4 is an injection amount adjusting means thereof. 5 is a schematic configuration diagram of the retardation device, and tttJ6 is a side sectional view of the main part of the device 1=I.
Fig. 7 is a calculation curve of the total injection amount per j stroke of the engine, and Fig. 7 is a retardation amount isometric curve of the external engine of this device 1/1.
Figure 8 is a curve showing the increased injection amount per stroke based on the accelerator lever opening of the wooden ennon, and Figure 9 shows the retardation amount based on the accelerator lever opening of the ennon with a wooden mount. The curve diagram, Figure 10 is an explanatory diagram of the injection amount at a constant engine rotation speed, Figure 11 is the 71-temperature isocurve diagram of the regenerator Kihiragi Ennon in Figure 6, and Figures 12 (,) to (d).
) are all flowcharts to explain their actions, No. 13
Figures 15 to 15 are diagrams for explaining the correction coefficient characteristics, Figure 16 is the intake throttle wind performance diagram, and Figures 17 and 18.
The figures are a diagram showing the intake throttle windshield characteristic 1 and fuel increase characteristic for suppressing the rise in filter temperature, respectively.

As shown in the third group, the particulate collection filter regeneration device (hereinafter referred to as the regeneration device in jil) is attached to the diesel engine (hereinafter referred to as the engine in ji+) 1, and the exhaust passage 2 of this engine 1 The diesel particulate collection filter (hereinafter referred to as single filter) 3 that collects particulates discharged from the combustion chamber of the engine 1 is regenerated.

An exhaust manifold 4 fixed to the engine 1, an oxidation catalyst a (hereinafter referred to as a 111-stage catalyst) 5, a filter 3, and a filter 3 (not shown), which is attached following the exhaust manifold 4 and supported on a base having a ceramic honeycomb structure. The exhaust passage 2 is formed by connecting the passages 77 and the like through an exhaust pipe.

Note that the filter 3 is made of 7 ohm heat-resistant ceramic with a catalyst.

Pressure sensors 7A and 7B are installed in the exhaust passages 2 on the inflow and outflow sides of the filter 3, respectively, for detecting the exhaust pressure at that position and outputting a detection signal to a mount roller 61, which will be described later.

Further, a temperature sensor 40 is provided as a temperature detection means for detecting the temperature (or exhaust gas temperature) Tf of the filter 3 or the exhaust passage 2 in the vicinity thereof, and a detection signal from the temperature sensor 40 is sent manually to the controller 6. be done.

Furthermore, a bypass passage 41 is connected to the exhaust passage 2 (1), and one end of the bypass passage 41 is connected to the exhaust passage upstream of the position where the filter 3 is disposed, and The other end is connected to the downstream exhaust passage 2 at the mini-filter installation position (in) without the filter 3 interposed therebetween.

Note that the other end of the bypass passage 4 may be communicated with the atmosphere.

An electromagnetic on-off valve 42 is interposed in the bypass passage 41, and the on-off valve 42 is opened and closed by a control signal from the controller 6, which also functions as a valve opening means.

Injection pump 8 for smoke and fuel taken into engine 1
is a distribution type pump, and is equipped with a hydraulic automatic timer 9 as a timing means, and an injection amount adjusting means 10.
The amount of fuel injected per injection can be adjusted to reduce the amount of fuel injected per injection. The accelerator 11 that operates this injection amount adjustment means detects the accelerator lever opening degree θ and outputs it to the controller 6.
The accelerator opening sensor 12 is turned off.

Note that reference numeral 13 indicates a rotational speed sensor that detects the rotational speed Ne of the engine 1.

As shown in FIG. 4, the injection M adjusting means 10 of the injection pump 8 moves a spill ring 15, which is slidably fitted onto a plunger 14 that reciprocates in the direction of the arrow, in a fuel increasing direction [and a decreasing direction e].
and move operations.

Reference numeral 16 indicates a drive shaft, and this drive shaft 16 drives a governor 1'7 that is interlocked therewith.

The operating force of the governor 17 acts on the foot roll lever 19 via the weight sleeve 18. Supporting lever 20 that pivots the upper end of this mount roll lever 19
is pivotally supported by a guide lever 23 together with a tension lever 21 via a fulcrum pin 22. This guide lever 23 is pivotally connected to a pin 24 fixed to the base, and its upper end faces a fuel increase device 25 constituting filter regeneration means.

Note that the lower end of the supporting lever 20 has a spherical portion 201.
is shaped like 1 & is slidably inserted into the recess of the spill ring 15.

The code 26 indicates a compression splash, which makes the spill ring 15 last for 3 nights! , Fee: I am looking forward to seeing you.

The fuel increasing device 25 includes a uniformity screw 27 screwed into the base.
, a reduction gear 28 integrated with this screw 27, a motor 29 that transmits rotational force to this gear 28, and a reduction gear 28.
, that is, a position that detects and outputs the rotation angle of the increase screw 27 (formed with 6 sensors 30. Position sensor: 3
0 feeds back to the controller 6 a detection signal corresponding to the rotation angle of the screw 27 in the fuel increase direction i, that is, the fuel increase amount AQ1, from the home position 11 of the increase screw 27.

On the other hand, the drive shaft 16 of the injection pump 8 is connected to the engine 1 through an injection timing retardation device (hereinafter simply referred to as a retardation device) 31 that constitutes filter regeneration means as shown in FIG.
It is connected to a row of floats (not shown) on the side. The retarding device 31 transmits the rotational force from the Ennon l side to the dry 7 shaft 16 via the planetary gear train 32, and fixes the ring gear 321 at the input end of the planetary gear train 32, and fixes the ring gear 322 at the output side. By rotating the piston 34 in the hydraulic cylinder 33, the phase difference between input and output can be set to 0° at the crank angle.
It is caused in the range of 60° to 60°.

The hydraulic cylinder 33 includes a retard chamber 331 and an advance chamber 332, and these chambers 331, 332 are supplied with pressure oil from an oil pump 36 via an electromagnetic spool valve 35.

This electromagnetic spool valve 35 moves the piston 34 by a predetermined amount each time it receives an output signal from the controller 6 for a predetermined period of time.

The reference numeral 37 indicates the oil filter, the reference numeral 38 indicates the relief valve, and the reference numeral 3 indicates the home position 11 of the piston 34.
Each position sensor that emits a detection signal according to the amount of movement from ′ is shown.

The electromagnetic spool valve 35 switches according to the output signal from the controller 6, and at this time, the piston 34 moves according to the amount of retardation! I! The lI amount is sent to the controller 6 as a detection signal.
This is a configuration in which feedback is provided to the

-)-
An intake throttle valve 45, which constitutes an air cleaner and filter regeneration means, is arranged in this order from the downstream side (atmosphere l1llll).

The intake throttle valve 45 is driven to open and close by a pressure responsive device 47. The pressure response device 47 supplies atmospheric pressure\'aL to a pressure chamber 472 partitioned by a Guia 7 ram 471 connected to the lot that drives the intake throttle valve [5.
An atmospheric passage 473 that guides the air is connected to a vacuum passage 474 that guides the vacuum Vvac from a vacuum pump or the like, and electromagnetic on-off valves 475 and 476 are interposed in these passages 473 and 474, respectively. ing.

Then, the twist/id 1 of each on-off valve 475, 476. '
ven L.

1' vac is supplied with a control signal from the mounting roller 6.

Further, in the intake passage 44 on the downstream side of the intake throttle valve 45, 41
One end of the passage 46 for the 1st IIJ circulation (hereinafter referred to as E (, iR)) is open.

Note that the bottom end of the EGR trace path 1G opens in a portion of the exhaust passage 2 between the exhaust manifold 4 and the Th1jlff catalyst 5.

An EGR valve 48 is provided at the intake passage side opening of the EGR passage 46, and this EGR valve 48 is connected to a pressure response device 49.
It is designed to be driven to open and close by. The four pressure-responsive devices are connected to a pressure chamber 492 partitioned by a Guia 7 ram 491 connected to the lot that drives the EGR valve 48.
An atmospheric passage 493 that guides atmospheric pressure \'at, and a vacuum passage 4 that leads vacuum \' vac from a vacuum pump, etc.
94 are connected to each other, and these passages 49
3,494 have electromagnetic on-off valves 495° and 496, respectively.
is interposed.

A control signal is supplied from the controller 6 to the slide/id of each on-off valve 495,496.

The opening degree of the intake throttle valve 45 is detected by the feedback signal to the controller 6 from the pressure sensor 50, which is located in the intake passage 44 on the downstream side of the intake throttle valve installation position (+1), and the EGR The opening degree of the valve 48 is determined by the potentiometer 5 that detects the movement of the lot of the pressure response device 49.
1 to the controller 6.

In addition, the opening degree of the lyL air throttle valve 45 is controlled by the pressure response device 47.
It may also be detected by a feedback signal to the controller 6 from the potentiometer 52 which detects the movement of the lot.

Of course, the opening degree of the intake throttle valve 45 may be detected by using the signal from the j-eka sensor 5( ) and the potentiometer 52 in combination.

Next, such engine 1 was driven to obtain the constant data shown in FIGS. 6 to 9. First, FIG. 6 shows the relationship between the engine rotational speed and the average effective pressure when the pre-catalyst 5 is maintained at 700'C, as an isocurve of the total injection 1iQ per stroke of the injection pump. FIG. 7 shows the relationship between the engine rotation speed and the average effective pressure when the pre-catalyst 5 is maintained at 7)0°C as a retardation amount α isocurve. Fig. 8 shows the relationship between the engine shift 111 section speed and the accelerator lever opening θ when the 111'' stage catalyst 5 is maintained at 700°C, and the t/1 curve of the increased injection amount ΔQ per one stroke of the injection pump. As a bot. FIG. 9 shows the relationship between the engine rotational speed and the accelerator lever opening degree θ when the pre-catalyst 5 is maintained at 700° C. as a retard amount α isocurve. Among these, in FIG. 6, for example, assuming a constant engine speed, the total injection per stroke ff
If 1Q is extracted along the mean effective pressure and plotted, Figure 10 is obtained. At this time, the injection pump is retarded by the retardation amount α shown in FIG. In this case, the total injection amount Q per stroke in steady state at each average effective pressure.

is indicated by a broken line, and the difference between the two is the fuel increase amount ΔQ.

However, this increased fuel ΔQ significantly reduces the thermal efficiency of the engine 1 due to the setting of the retard angle ia.
The effective work of the engine 1 does not appear as an increase in the average effective pressure, but is released as heat loss. In other words, the amount of heat corresponding to the total amount of fuel Q per stroke is the sum of the amount of work and heat loss, but here, by setting the retardation amount α, the amount of heat equivalent to the fuel increase amount ΔQ is completely reduced to heat loss. This suppresses the increase or decrease in the amount of work itself.

Note that the incompletely combusted exhaust gas resulting in heat loss is oxidized by the catalyst on the front stage catalyst 5 and the filter to generate combustion heat.

In other words, by increasing the fuel injection rate and at the same time retarding the injection timing, the exhaust gas temperature becomes low and the particulates on the filter 3 can be combusted. It should be playable.

In addition, Fig. 11 shows the relationship between the engine revolutions + + g speed and the average effective pressure when maintaining the 1ii 7-stage catalyst at 700''C.
It is shown as the population temperature isocurve of the front stage catalyst.

By the way, the j-square sensor 7A47 is connected to the mounting roller 6.
B, 50. Accelerator opening sensor 129 Rotation speed sensor 1
3. Position sensor 31), 39+temperature sensor 40. In addition to inputting the detection signal from the potentiometer 51 (52), a water temperature sensor 53 that detects the water temperature 'I'w.Vehicle speed■
Detection signals are input from the I4L speed sensor 54 which detects 29. Electromagnetic spool valve for retarding injection timing 35. Intake throttle valve opening adjustment valve 475
．． 47 LEGR valve opening adjustment on-off valve 495, 496. Bypass passage on-off valve 42. It is designed to be output to a display 55.

Note that the display device 55 is disposed at a suitable location within the vehicle interior, for example, on an instrument panel.

The processing performed by the controller 6 will be explained below using the flowcharts shown in FIGS. 12(,) to (d). This flow is triggered once by a timer interrupt signal that interrupts at a predetermined timing. First, in step a], the filter temperature TI of the exhaust passage 2, the water temperature Tub, and the cumulative particulate information Np (this information Np is (obtained based on the pressure difference between upstream and downstream or 1tt calculation of engine rotational speed Ne), engine rotational speed Ne, intake passage pressure Pr, accelerator lever opening θ, vehicle speed ■, actual retard amount AQr, etc. input from each sensor.

Next, in step a2, the filter temperature Tf is read, and in step a3, this temperature 1'f is changed to T, (=60
0) or more is determined.

If the filter temperature Tf is lower than 600°C,
Taking the NO route, it is determined in step a4 whether the prohibition flag is cleared.

The prohibition flag is a flag that is sent when filter regeneration fails or when regeneration is impossible, as will be described later.

Since the prohibition flag is normally cleared, the YES route is taken and in step a5 it is determined whether the +11 raw flag is cleared. The playback flag is set in step ai described below.
Since this process is set after the timer A set) process performed in step l, it is initially cleared, so that in step a5 the YES route is taken, and then in step a6 the water temperature '1'w is set. Loaded.

Soshite, S'7' y Fa 7 Te,'r-≧T*(
If the water temperature 'l' is low, no further processing is performed and the process returns.

However, if down ≧'1=50℃), step a
At step 8, particulate accumulation information N1+ is read, and at step a9, it is determined whether Nll≧k, and Np<
If the number of particulates is k, that is, if there are not many particulates, no further processing is performed and the process returns.

Also, if Np≧, it means that the filter 3 is clogged with particulates, so the filter should be regenerated (first, in step alO, by closing the EGI valve 48, EGI< is released, and then after step all, timer A is set to A = A o
Then, in step a12, a reproduction flag is set.

Note that A (second setting time) is, for example, several tens of seconds (20 to 20 seconds).
40 seconds).

Step a8. The process a9 is performed by a regeneration actuating means that detects that particulates are collected in the filter 3 and activates the filter regenerating means.

Further, in step a12', a reproduction start display (displayed on the display 55) is made.

The reason why EGR is canceled here is to avoid complicating filter regeneration control.

Since the regeneration flag was set in step a12, N is determined in step a5 unless the regeneration flag is cleared.

Take roux 1 and perform steps a6 to al 2. The processing of a12' is skipped.

Next, in step a13, the vehicle speed ■, the accelerator lever opening θ
is read, and the operating state of engine 1 is set to step a14.
It is cut off at ↑. That is, in step a14, it is determined whether the idle link/stop 11 is in progress.

The reason why such t'll lJi is performed is that the filter regeneration process is different between when the vehicle is idling/stopped and when the vehicle is running.

Therefore, if the balance is A14 and the car is running, it's jelly! When fI3 is reached, the running regeneration part Ell routine ai5 suitable for filter regeneration while driving is executed, and if it is determined that idling/stop r1 is in the middle, stop regeneration suitable for filter regeneration while idling/stopping is executed. Processing routine alG is executed.

In the driving regeneration processing routine a15, first step a17
It is determined whether the stop flag has been cleared or not. If the stop flag has not been cleared, the stop regeneration is canceled in step a18, and it is determined in step a19 whether the running flag has been cleared.

Further, if the stop flag is cleared, the steering knob a19 is directly processed.

At first, the running flag is cleared, so take the YES route in step a19, and in step a20, timer B (
The timer means) is set as B=B and counting is started.

Note that time B is set by timer B. (First set time) is, for example, about several minutes (2 to 4 minutes).

Then, in step a21, the running flag is set, and in step a22, the stop flag is cleared.

After that, in step a23, the engine rotation speed Ne is determined.

The accelerator lever opening degree θ is read.

Note that the running flag was set in step a21, so unless the running flag is cleared, step a19
The No route is taken, and the processing in steps a20-a22 is jumped.

After step a23, in step a24, the retard characteristic Jα, fuel increase amount AQ, and influence Pc of the intake throttle valve 45 are searched from the first table on the map in the memory.

Here, in addition to Ja + ΔQ, Pc is also set. By appropriately restricting the intake air during filter regeneration, the flow rate of air flowing into the filter 3 is reduced, and the rise time and rate of rise in temperature are controlled. This is to do so.

This intake throttle wind resistance is shown in FIG. 16 using the accelerator lever opening θ as a parameter. From this figure,
It can be seen that the smaller the accelerator lever opening degree θ, the larger the intake throttle amount, that is, the intake throttle amount is set to an excessive throttle.

Subsequently, in step a25, the acceleration/deceleration correction coefficient 31+ is set according to the rate of change dθ/dt of the accelerator lever opening degree θ, as shown in FIG. ItS13.

Then, in step a26, the target retard amount Δα is set, in step a27, the actual retard amount Δαr is read, in step 1128, Δa'=Δa−Δαr is calculated, and in step a25], according to Δα' , No. 14.
．． As shown in Fig. 15, the fuel 1F correction section #lLK Q +
α' is set as the intake throttle 1 correction coefficient, and in step a30, the fuel increase amount ΔQc=KQAQ is calculated, and in step a31, the intake throttle amount pcc"SpKα'
An operation Pc is performed.

Here, AQc is calculated by multiplying ΔQ by K(Z, and Pc=
To calculate Pcc by multiplying Sp by KO',
Due to the following reasons.

That is, the response delay in the operation of the retardation device 31 is greater than that in the operation of the pressure response device 47 that drives the fuel increase device 25 and the intake throttle valve 45.

If a target value signal is given simultaneously to device 25 + 47 with a small response delay and device 131 with a large response delay, devices 25 and 47 will reach the target value immediately, but device 31 will reach the target value a little later. Therefore, proper filter regeneration cannot be performed in this transient state.

Therefore, the actual retard amount Δα of the device 31 with a large response delay
By measuring r, adding α and Ka' to the correction coefficient based on the difference Δα' from the target value Δα, and multiplying ΔQ by α and Pc by Ka', it is possible to keep pace with the response delay of the device 31. Therefore, I decided to activate the equipment J25.47.

By controlling in this manner, appropriate filter regeneration can be performed in the above-mentioned transient state (actually, the transient state occupies a considerable portion).

Furthermore, the reason why the acceleration/deceleration correction coefficient Sp is also multiplied when 9 is output from pea is as follows.

ff1l is a coefficient α that compensates for response delay during acceleration/deceleration.
This is to reduce the influence of ′ and create a sense of acceleration/deceleration.

In other words, as mentioned above, due to the effect of Kα', the amount of intake throttling changes in accordance with the response delay of the retardation device 31, so even during acceleration and deceleration, the amount of intake throttling only changes slowly. As a result, there is no feeling of acceleration or deceleration.

Therefore, during acceleration and deceleration, a correction coefficient Sp with characteristics as shown in FIG.
was set.

Second, the purpose is to improve acceleration/deceleration performance by going further than compensating for the response delay described in section 2 above. That is, when the characteristics of the correction coefficient Sp are accelerated or decelerated, the value increase required to compensate for the response delay is also set to change significantly.

In the tjS13 diagram, the characteristics shown by broken lines are those set only to compensate for response delay, and the characteristics shown by solid lines are set to further improve speed performance. Show what you have.

Regarding fuel, the reason why it is not corrected like the intake throttling amount during acceleration and deceleration is that in the structure shown in FIG. .

In step a30, is multiplied by α, which is a correction coefficient that is meaningful when the accelerator lever opening θ does not change, so when accelerating or decelerating, the accelerator
Priority is given to the first step, and fuel is increased or decreased in a responsive manner.

Then, in step a32, it is determined whether the time set by timer B is O (B=07). If it is not 0, it is returned.

If B=0, the upward regeneration is canceled in step a33 by the resent means, and the running flag is cleared in step a34.

Next, to explain the stop regeneration processing routine a16, after taking the YES route in step a14, it is determined in step a35 whether the running flag has been cleared, and if it has not been cleared, in step a36, ■4 seedlings are removed from ■culms, and it is determined in step a37 whether or not the stop flag has been cleared.

Also, if the running flag is cleared, direct steering/2
The process of block a37 is performed.

At first, the stop-11 flag is cleared, so step a3
8, timer CI I) l b (timer mahi 1f 4f means) is C=C.

1)=D. , 1:=lEo and Sera)% error counter starts. For example, C6 is about 10 seconds, tO is about 20 to 30 seconds, and the time (ti opening setting time) is about 1 to 30 seconds.
A value of about 3 minutes is set.

Then, in step a39, the stop flag is set, and in step a40, the running flag is cleared.

Note that since the stop ALy lag was set in step a39, unless the stop flag is cleared, step a37
The No route is taken, and the processing of steps a38 to a40 is jumped.

After that, in step a41, it is determined whether the time set by timer C is 0 (C=07), and if C≠0,
At step a42, the retard amount is set to Δa, the intake throttle amount is set to P11, and the fuel increase is set to AQ+, and the program returns.

Also, if C=0, that is, after about 10 seconds have elapsed, in step a43, the time set by timer D is 0.
(D=07), and if D≠O, in step a44, the retard amount Δa and the fuel increase ΔQ remain as they are. Ru.

In this way, when timers C and D are set, the fuel is increased by ΔQ and retracted by Δa, and the intake throttle valve 45 is set to a slight throttle opening P, and then, for example, for about 10 seconds. After the time elapses, the intake throttle valve 45 reaches an excessive throttle opening degree of 2, while ΔQ1°Δa remains as it is.

As described above, in the pre-stage where a light throttling operation is performed, the temperature of the front catalyst 5 rises in a short time due to the sufficient amount of oxygen in the exhaust gas, and the subsequent excessive throttling operation is not performed. At the stage where flit
The temperature of the filter 3 is maintained at a high temperature necessary for re-combustion due to the rapid reaction heat of a large amount of combustible components generated in the stage catalyst 5, and thus no harmful gases are emitted during the regeneration operation. Filter 3 is regenerated in a short time.

After that, it becomes D20, that is, 20 to 3 after the start (
After 3 seconds have elapsed, in step a45, it is judged f411i whether the time set by timer E is 0 (E=07), and if E≠0, in step a46, the retard is canceled and the predetermined intake throttle is set. I) quantity P and fuel increase Δ
Q2 is set and then returned.

Here, the intake throttle amount of P is smaller than P. In other words, this is the lightest amount of aperture.

Further, jQ2 is set as ΔQ2<<AQ+.

As shown in item 2, after 20 to 30 seconds have elapsed after the tie master F, the particulates are usually burned and the temperature rises to a high temperature state, and this high temperature causes negative effects such as burnout of the filter 3. Step a46 is a process for suppressing temperature rise in order to avoid the adverse effects of peeling.

It can also be said that this is a process that precedes the subsequent filter temperature rise suppression process.

In other words, by the process of step a46, the oxygen concentration is
As a result, the amount of exhaust gas increases and the temperature rise of the filter 3 is suppressed.

Then, when E=0, that is, 1 after the timer starts.
After approximately 30 minutes have elapsed, the above-mentioned resent means cancels the stop regeneration in step a47, and in step a48
The stop flag is cleared.

By the way, when running regeneration processing and stop regeneration processing are performed,
When the particulates in the filter 3 start to burn out, the filter temperature Tr exceeds 600°C (T,). I wonder if (A=0
7) is determined and if it has not passed, step asO
Then, subtract A from A-1 and Jj<, that is, by 1. In step a51, filter temperature '[
It is determined whether r is 1'2 (=900°C) or more.

Kokote, 1゛f≧'I'2 (= 900 C) - C"M
Lj! Since the temperature rises too much and has an adverse effect on the wandering system, such as VT loss in the filter 3, a temperature rise suppression processing routine a62 is executed, but this processing will be described later.

At step a51, NO and '1! If the request is rejected, it is determined in step a52 whether the JQ order 11 law γ division flag is cleared. If the temperature rise suppression processing routine aG2 is executed, the suppression flag is cleared, but if the temperature rise suppression processing routine aG2 has been executed, the suppression cancellation flag is set, so step a52 is executed accordingly. Then YE
S or N.

1' is cut off.

If you take the NO route, step a53=a5La
In step 55, processing for clearing the inhibition 7, clearing the inhibition release flag, and releasing the inhibition is performed in this order.

After that, in step a56, A=07 is asked again,
If No, the process from step a13 onwards is performed.

Note that if YES in step a52, the process of if-contact step a5G (A,=07) is performed. Further, after passing through step a54, the YES route is always taken at step a52.

On the other hand, step n56 [this process of 856, step a11fa49. Processing a50 measures the elapsed time during filter regeneration, specifically, the time during which the filter temperature 1"f is higher than the set temperature (000°C) out of the elapsed time during the operation of the filter 11 engineering means. If the answer is YES, that is, if the time set by timer A has elapsed, it is determined in step a57 whether or not the playback flag has been cleared, and if it has not been cleared. By this process, the filter temperature T f M2 is increased from the beginning of 7o-start.
If O3iC(-1', ) or more, the filter regeneration means does not work.

If No in step 7□a57, in this case, it means that the regeneration has been completed by the filter internal generation means 1, so in step a58, the regeneration incomplete display (also in step a74 described later) is displayed. Remove IW, cancel (erase) the playback start display, perform a playback completion display (displayed on the display 55), and step a5! At J, the running internal power is removed by 1, the stopping power is canceled, and the EGR is restored. After that, Step, B + 16 (), N = (
1+Rn=t) (Rn: number of reproduction repetitions) and hystep a61, the process returns as running flag clear, stop flag clear, and reproducing hook clear.

Further, if step a51 is YIES, that is, the filter temperature 'lgo is 9 (month) C or higher, step a86
It is determined whether the bypass passage 41 is open or not, and if it is open, the bypass passage 41 is closed (step a87). If not, step a87 is jumped to, and for safety, the temperature control routine is executed. aG2 is executed. In this temperature rise suppression process a62, first, in step a63, it is determined whether the suppression flag is cleared. Since it is initially cleared, take the YES route and set the suppression release flag in step a64, set the suppression flag in step a65, and set the suppression flag in step a66.
, a67, running regeneration and stop regeneration are canceled, respectively.

When the suppression flag is cleared in step a65, N is returned in step a63 until it is cleared.

The route is taken, and steps a64 to a137 are jumped.

After step a67 or a63, step a68
, engine rotational speed Ne and accelerator lever opening θ
In step a69, the intake throttle amount P and the fuel increase ΔQ are searched from the second table in the memory.

Then, in step a70, the intake throttle amount is set to P, the fuel increase amount is set to ΔQ, and the process returns.

Here, the intake throttle 1 characteristic when filter temperature rise is suppressed is shown in FIG. 17, and the fuel increase characteristic is shown as follows.
The result will be as shown in Figure 18. Note that the fuel increase characteristic in the t518 diagram is shown as a characteristic with the fuel increase as a parameter.

In this way, by restricting the intake air and increasing sales of fuel, the rise in temperature of the filter 3 is suppressed.

If running 91 regeneration processing ai5 or stop regeneration processing a16,
If 411 raw of filter 3 can be performed, B=ospE
=.

1j;'', step a32 and step a42.
a44゜From LI46, after appropriate processing, step a
Processes 56 to a61 are performed, but if regeneration of filter 3 fails or is incomplete, I'3 = 0,
IE = 0, and then step a33.
The process moves to a34 and steps a47 and a48.

Although such processing has been explained, these processing a
After 34 and a4B, the following processing is performed.

First, in step a71, by the resent means,
Timer A is no\=no\. is set again and step a
At 72, jl+ 'J1a return number l + 11 is Rn+1
Then, in step a73, it is determined whether 1<11≧days.

This g means the allowable number of Ii raw repetitions, and is set to a value of about 1(), for example.

If the result in step a73 is No, then in step a74, a reproduction incomplete display (displayed on the display 55) is performed, and the process returns.

If YES in step a73, reset Rn=0 in step a75, and set EGR to a in step a76.
After returning, the playback flag is cleared in step a77,
In step 877', the regeneration start display and the regeneration incomplete display are canceled, in step a78 the bypass passage 41 is opened, in step a79 the timer F is marked F''F o and the counter is started, and in step a79',
A non-reproducible display (abnormality display) is displayed on the display 55, a prohibition flag is set in step a80, and the process returns. Note that Fo set by timer F is, for example, about 30 minutes.

In this way, when the prohibition flag is set to zero, steps a1 to 70- start to operate in response to the next timer interrupt signal, the No route is taken in step a4, and the timer F is set in step a81. It is determined whether the time has elapsed (F=07).

Then, until 30 minutes have passed after the start of timer F,
Assuming that the regeneration rate is fi@, NO in step a4.
route, take the No route in step a81, determine whether the bypass passage 41 is closed in step a84, and if it is closed, open the bypass passage 41 in step a85, and if it is quiet, proceed to step a8s. Jump and return. As a result, in a state where EGR is restored (see Step G), exhaust gas is discharged through the bypass passage 41 that bypasses the filter 3 without causing deterioration of engine performance.

In this case, since the abnormality display (reproduction impossible display) processing is performed after step a80, the abnormality is displayed on the display 55, so the passenger can use the filter from this display.
It ends with knowing that life is impossible.

Furthermore, if l'' = U, that is, after about 30 minutes have elapsed after the start of timer F, the regeneration impossible display is canceled in step a81' in order to attempt filter regeneration again.
In step a82, the prohibition flag is cleared, and in step a
At step 83, the bypass passage 41 is closed, and the processing from step 5 onward is performed.

Below, various cases will be explained.

(1) When the filter 3 is not clogged (filter regeneration is not required) In this case, various data are input in step a1 for each timer interrupt signal, and the filter temperature 7f:1go is first determined. . Normally, if Tf < 6 U IJ, take the No route at step a3, then step a4 (
The water temperature TII+ is determined through Y ES )→a 5 (Y ES )−a 6 . If Tu+<50
If so, the process returns, but if T-≧50, it is determined in step a8Ia9 whether the filter is clogged.

In this case, since the filter 3 is not clogged, the NOj rate is taken at step a9 and the process returns.

After that, even if a timer interrupt signal is received, the same process is repeated, so no filter regeneration process is performed.

(If the 2-filter filter 3 is clogged (filter regeneration is required)) In such a case, the regeneration operation means will cause the YF to be removed in step a9.
, taking the S route; first, EGR is released (step a J +,1). This is controlled by the control from the roller 6 (by the F? number 2, the valve 49 of the pressure responsive device 49
Strain 5 to 1ii11, valve, 4'! Close J6 and strain E
Close the GR valve 48. This simplifies subsequent filter regeneration processing control.

Next, timer A is set to time A, which is necessary for filter regeneration.

is set (step a11), the playback flag is set, and the 111 live start display is displayed, followed by step a1.
2°a12'), the enon operation state is determined.

If the vehicle is running, the running jlj raw processing routine a15 is executed x times. In this processing routine a15, the timer 13 sets the first set time B. After the is set and started (step a20), regeneration processing is performed according to the driving condition (step a23゜a).
21L), processing considering that the response delay of the operation of the retardation device 31 is larger than that of the pressure response device 47 for driving the fuel increase device 25 and the throttle valve 45 (steps a27 to a:
( ]) enables appropriate filter regeneration even in a transient state.

Also, compensation during acceleration and deceleration is taken into consideration (step a2
5. a31), so that the feeling of acceleration and deceleration is not impaired.

Since the above processing is performed at extremely high speed, NO is taken in step a32.

After that, when the flow is restarted by the timer interrupt signal, if the filter 3 has started regeneration according to the setting of the fuel increase ΔQel intake air curvature amount Pcc described above, the filter temperature 1'f will be 600°C or higher. Therefore, take the YES route in step a3,
Step a49. At step a50, the time during which the temperature remains at 600°C or higher is measured, and at step a51, it is checked whether the filter temperature 1'f has risen too much.

If the filter temperature Tf has not risen too much, the process from step a52→(a53→as4→a55)→a56 is performed. This step a56 is to check whether A, (20-40) seconds (second set time) have elapsed after setting the timer A, and if it has not elapsed, N
(,) Take Lou 1 and Ste/Bu a13. a14
Then, the point npr raw processing routine a15 is executed again.

Repeat this for Ilr 1iil and after Bi2 (No in step a32) (first set time elapsed base +1i+
ni), Ste Nobu a1~a3, a'l-)~u5
2 (a49 to a55), when J\=() (after the second set time has elapsed), "1" is set at base step L15G.
Take US, step a57 (No) → a58~aG
Process J and return.

This terminates the operation of the filter regeneration means,
Filter 11 ■ Raw is completed.

Terminating the operation of the filter regeneration means in this way is
At least when the time measured by the timer means reaches the set time (when A=0 in step a56), the control means for terminating the operation of the filter (11), specifically the timer means. Based on the 81 measurement results of filter 11■, before the elapsed time during operation of the heating means reaches the first set time (for example, about 3 minutes) (Bi2), the set temperature is set within the above elapsed time. When it is detected that the time in which the temperature is higher than (600°C) has reached the set time of tjS2 (for example, about 3() degrees) that is shorter than the first set time (at step a32, Bi2 step a56
This is a control means for terminating the operation of the filter regeneration means when A=0 in the above example.

As a result, if the filter temperature Tf exceeds 600° C. for 30 seconds out of 3 minutes, for example, the filter 3 is assumed to have been regenerated, and the operation of the filter regeneration means is stopped.

At this time, in step asB, by canceling (erasing) the playback incomplete display and the playback start display, a playback completion display is made. ), the regeneration completion display means indicates that the regeneration of the filter 3 has been completed, or based on the determination result of the determination means that determines whether the regeneration of the filter 3 has been completed based on the measurement result of the timer means. This is done by a display means that indicates whether the reproduction is completed or not.

Note that this determining means determines B;l! in step a32. 0, and when A=0 in step and asG, it is determined that the regeneration of the filter 3 has been completed.

Ichiriki, in step a1.4, while idling/stopping...
If 1-11 is disconnected, the stop regeneration processing routine al
G is defeated. In this processing routine 816, after the timers C, I), U-C''C,, l), Eo (IE,: first set time) are set and started (step a38), filter IIi is generated. At this time, in the early stage (while C is not 0), step u4
As a result of the process in step a44, the temperature of the front catalyst 5 rises in a short period of time, and in the middle stage (while C is not 0), the temperature of the filter 3 rises again as a result of the process in step a44. The temperature required for combustion is maintained at a late stage (D is 0 and El).

), the upper Jjl of the filter temperature Tf is suppressed.

Of course, during the processing at the front, middle, and latter stages, the filter temperature Tf#'6 is returned along with the combustion, since the filter is returned after steps a42, a44, and a4G.
00"(: or higher (in this case, T[ is assumed not to be 900°C or higher), step a49.a50.a51(
NO), as2 (a53 to a55), and the process leading to a56 are performed, and the second set time A has not elapsed.
Execute the stop regeneration processing routine ILIc) again 9 Repeat this several times to realize the processing at the earlier, middle, and later stages as described above, and the elapsed time during the operation of the filter regeneration means becomes the set time l of tjSl. (Step a)
45, N0TE≠0), and the time during which the temperature remains higher than the set temperature (600° C.) during the elapsed time is the second set time A. When (<the set time of Pt51), the operation of the filter regeneration means is terminated by the above-mentioned control means.

In this case as well, if the film temperature Tr exceeds 600° C. for 30 seconds out of 3 minutes, for example, it is assumed that the filter 3 has been regenerated and the operation of the filter regeneration means is stopped.

In this case as well, the indications of playback incomplete and playback start disappear, and the playback completion display is made (
Step a58).

If the filter temperature becomes 900°C or higher during birth processing or stop 11j raw processing, take the YES route in step a51.
After closing the bypass passage [1] (step u813.
a87), 41st Woman' - Execute the rise suppression routine a62. In this processing routine aG2, the filter temperature '
Igo's ``two four'' is suppressed.

Note that during the car regeneration process, the filter temperature is suppressed in advance in step a46, so normally Tf is 9.
(It is almost unthinkable that the value will exceed 10'Q, and the value of use is high during the running regeneration process.

Further, the reason why the opening/closing of the bypass passage 41 is determined after step a51 is that there is a possibility that the bypass passage 41 may be open at 01j when this process is started because regeneration is impossible.

By the way, as a result of running regeneration processing and stop regeneration processing, B=0. Before E=0 (step a32゜a4
5), if A=0 is not achieved (step a5
6), by the above reset means 1), step a3
3°a34; step a47. After a48, in step a71, timer A is reset, and the number of reproduction repetitions R is
n is added (step a72), and until the permissible number of times exceeds 8, an indication that the reproduction is incomplete is displayed and the process returns. That is, in this case, since the reproduction is not completed, a message to that effect is displayed. Such display is performed by the above-mentioned display means.

When the number of regeneration repetitions Rn becomes 8 or more, it is assumed that there is a strong possibility that filter regeneration is impossible, and the following processing is performed. That is, by restoring EGR (step a)
76), and opens the bypass passage 41 (step a78).
), after setting timer F to )3 (step a79)
, a non-reproducible display (abnormal display) is made by the non-reproducible display means (step a79'). At this time, the reproduction incomplete and reproduction start indications are canceled (step a77).
).

After that, set the Kin 11-7 lug (ste knob a8
0).

Then, when the prohibition flag is set, step a4 (No) is executed after the next timer old slot No. 4 and 1 is entered.
Take t=o? (Step a81) hr'l'1
lllllJi will be done.

This time F' is set to, for example, about 30 minutes, but until this time elapses, step a81. After taking the No route and closing the bypass passage 41 (step a
84. a85), prohibiting filter regeneration processing. At this time, the opening/closing of the bypass passage 41 is determined in step a86. This is because the bypass passage...↓1 may be open at a87.

In this way, if the resent means are operated continuously, i.e., if the filter 3 is not successfully regenerated, the resent means will be activated by another means. In some cases, the operation of the second filter regeneration means is temporarily prohibited, and such prohibition is performed by the prohibition means. During this period, the non-pest labeling is being carried out (
step a79').

This makes it possible to prevent deterioration of engine performance and realize smooth exhaust gas.

Further, when F=O, that is, after about 30 minutes have passed, in order to improve the self-regeneration function, the display indicating that regeneration is not possible is canceled (step ag1'), and the filter regeneration process is attempted again.

That is, step a82. After the process of step a83, the process from step a5 is performed again.

If the filter regeneration is successful, the YES route is taken at step a56, and steps a57 to a61 are reached, so that the replay impossible display disappears and a replay completion display is displayed instead. Specifically, the display 55 is completely turned off.

Note that even if this is done, steps a32. If the answer is YES in step a45, and the processing from step 1 onwards is performed, and the number of reproduction repetitions Rn becomes 6 or more, the display indicating that reproduction is not possible is displayed again (step a79').
The prohibition flag is set (Step Company 80), and F
Filter regeneration is prohibited until =0 (until approximately 30 minutes have elapsed).

After that, if this is repeated one time, the display indicating that playback is not possible will hardly disappear, so in such a case, either remove the filter 3 and start playing again, or replace the filter 3.

In addition, in the embodiment described above, the time during which the detected temperature '1'r was higher than the set temperature (for example, 000'C) was measured during the elapsed time during which the filter regeneration means was in operation. A similar effect can be obtained by measuring the time during which the detected temperature 1'f is lower than the set temperature during the elapsed time.

Further, the display by the display 55 may be visually appealing, such as a lamp or a light emitting diode, or may be audible, using audio or the like.

Furthermore, the specific values of temperature and time used in the examples described in 11;j are merely examples.

As described in detail, the control device for the particulate collection filter regeneration device in a diesel engine of the present invention provides the following effects and advantages.

(1) Regardless of engine driving conditions, particulates can be re-burned automatically without deteriorating driveability.

(2) Discrimination means for determining whether regeneration of the particulate collection filter has been successful; and a prohibition means for temporarily prohibiting the operation of the filter regeneration means when regeneration of the particulate collection filter is not successful based on the determination result of the other means, so that deterioration of engine performance can be prevented. No need to invite.

(3) Furthermore, one end communicates with the exhaust passage upstream of the particulate collection filter arrangement position, and the other end communicates with the downstream exhaust passage of the particulate collection filter arrangement position without passing through the particulate collection filter. or a bypass passage communicating with the atmosphere, an on-off valve installed in the bypass passage, and a valve opening means for opening the on-off valve to the outside when the operation of the filter regeneration means is prohibited due to the operation of the prohibition means; is provided, so even if the particulate collection filter is clogged, the exhaust gas can bypass the particulate collection filter and come out.
Smooth exhaust can be achieved without causing a drop in ennon output (4) -4L7 Therefore, self-regeneration (disdainful ability is reversed).

[Brief explanation of the drawing]

Figure 1 is a diagram showing the relationship between engine rotational speed and average effective engine speed divided into operating ranges in which the filter can be regenerated by conventional equipment, and Figure 52 is a diagram showing the temperature increase effect and output reduction due to retardation of the injection pump. 3 to 18 show a control device for a particulate collection filter regeneration device in a diesel engine as an embodiment of the present invention, FIG. 3 is a schematic configuration diagram thereof, and FIG. 5 is a schematic configuration diagram of the retardation device, FIG. 6 is a full injection FrC isocurve per stroke of an engine with a water system τj, and FIG. F7 is a wooden model. Fig. 8 is an isocurve of the retardation amount of the engine with this device (tI), and Fig. 8 is an isocurve of the increased injection amount per stroke based on the accelerator lever opening of the engine with this device. A retard amount isocurve diagram based on the lever opening degree, FIG. 10 is an explanatory diagram of the injection amount at a constant engine rotation speed,
Fig. 11 is an exhaust temperature isocurve diagram of the engine equipped with the regenerator shown in Fig. 6, Figs. 12 (,) to (d) are flowcharts for explaining its operation, and Figs. 13 to 15 are all the same. Figure 16 is a graph for explaining the correction coefficient characteristics, and Figures 17 and 18 are diagrams showing the intake throttle wind resistance and fuel increase characteristics, respectively, for suppressing the filter temperature rise. . 1. Diesel engine, 2. Wandering A passage, 3.
Particulate collection filter, 4. Exhaust manifold, 5. Oxidation catalyst, 6. Controller, ? A. 7B...pressure sensor, 8...injection pump, 9...hydraulic automatic timer, 10.10'...injection amount adjusting means constituting filter regeneration means, 11...accelerator,
12.Accelerator opening sensor, 13.Rotation speed sensor, 14.Plunger, 15I.Bill ring, 16.
・Drive shaft, 17...Bana, 18...Weight three 7.19...Funtrol lever-120...
The boating lever, 21... tension lever, 2
2...Fully point bin, 23...Guide lever, 24...Pin, 25...Fuel increase device constituting filter regeneration means,
26... Compression spring, 27... Increase screw, 2δ...
, output capacitor, 29...motor, 30...position sensor,
:3]...Injection timing retard device, :32...Planetary gear train,
83... Oil 1] Niji ring, 34... Piston, 35...
・Electromagnetic spool valve, 36..Oil pump, 37..Oil filter, 3S..Relief valve, 39..Position sensor,
・′lO・・Temperature sensor as temperature detection means, l[]
...Bypass passage, 42...Opening/closing valve, 43...Intake manifold, 44...Intake passage, 45...Filter lll-
Intake throttle valve, 46... EGR passage, 4, constituting the generation means
7...Pressure response device, 18...IEGR valve, 49...
Pressure response device, 5()...jf sensor, 51.52.
・Potentiometer, 53...Water temperature sensor, 54...Vehicle speed sensor, 55...Table】i; Container, 201...Spherical part, 3
21゜322...Ring gear, 331,332...Hydraulic cylinder chamber, 471...GuiRyo7 ram, 472...Pressure chamber, 473...Atmospheric passage, 474...Vacuum passage,
475゜476...Opening/closing valve, 491...Guiafram,
492...pressure chamber, 493 atmospheric passage, 494...vacuum passage, 495,496...opening/closing valve. Agent Patent Attorney Yoshihiko Iinuma Figure 1 Engine 1 Turning J- (rpm) - Figure 2 + 234 56 'P P'J Jly)'cfi (kg/crn2)
- Fig. 5 - Fig. 6 Engine rotation (rpm) - Fig. 7 Engine rotation (rpm) - Fig. 8 - Fig. 5 (19 m) - Fig. 9 Tsu-(rρm)-Figure 10-! P-Kunyou Effect Roux Figure 13 ↑ S. t - Figure 14 ↑ Figure 15 Figure 16 ↑ Figure 17 ↑ 1

Claims (3)

[Claims] (1) 411.1.1.1 is installed in the exhaust passage of a diesel engine and extends from the combustion chamber of the diesel engine. a particulate collection filter that collects emitted particulates;
When particulates are collected by the particulate collection filter, the particulates are burned and 1
- a filter regeneration means that operates to regenerate the particulate collection filter described in 1. In a diesel engine, the diesel engine is characterized by further comprising prohibition means for temporarily prohibiting the operation of the filter generation means if regeneration of the particulate collection filter is not successful based on a determination result of the means. Control device for particulate collection filter regeneration device. (2) The determination means includes means for detecting whether or not regeneration of the particulate collection filter is completed, and a timer means for measuring the elapsed time during the regeneration, and the timer means measures the time measured by the timer means. When the completion of the regeneration is detected by the detection means before the timer reaches the set time, it is determined that the regeneration force j is successful, and the detection is performed until the time measured by the timer means reaches the set time. A control device for a particulate collection filter regeneration device in a diesel engine according to claim 1, wherein when the completion of regeneration is not detected by the means, it is determined that the regeneration has not been successful. (3) When particulates are collected by a particulate collection filter that is installed in the exhaust passage of a diesel engine and collects particulates discharged from the combustion chamber of the diesel engine, and the particulate F collection filter. The particulate collection filter 111 is equipped with a generation means that operates to burn the particulates and regenerate the particulate collection filter, and it is determined whether or not the particulate collection filter 111 has been successfully regenerated. Distinguish 1! 1-1j of different means and means of discrimination
Prohibition means for temporarily prohibiting the operation of the filter production means is provided if the 111 generation of the particulate-1 collection filter is not successful based on another result,
In addition, one end communicates with the upstream exhaust passage of the particulate collection filter installation position described in 2, and the bottom end communicates with the downstream exhaust passage of the same filter installation position or fire without passing through the particulate collection filter 2. a bypass passage communicating with the
The bypass passage is characterized by comprising an on-off valve interposed in the bypass passage, and a valve opening means for opening the on-off valve when the operation of the filter generating means is prohibited due to the operation of the inhibiting means. A control device for a particulate collection filter regeneration device in a diesel engine.