JP2005171973A - Engine control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To satisfy both shortening of regeneration time and the prevention of the situation where a passerby is carelessly bathed in high temperature exhaust gas, in a high dimension, when regenerating a filter member for collecting exhaust particulates, while operating an engine in high rotation in stopping. <P>SOLUTION: This filter member 12 for collecting the exhaust particulates, is arranged in an exhaust passage 3 of the engine 1. When a collecting quantity X in the filter member 12 becomes a predetermined value A2 or more, a regeneration indicating lamp 41 is turned on for urging indication of regeneration. At this time, the regeneration (manual regeneration) of the filter member 12 is started by turning on a manual regeneration switch 35 being manually operated. The regeneration is performed by raising the exhaust gas temperature by setting the engine 1 to an engine speed higher than an ordinary idle speed. The regeneration time is shortened by setting an engine speed when regenerating the filter member 12 in stopping, to a large (high) engine speed when an occupant stays in a car or in the vicinity of a vehicle. An exhaust gas temperature rise is restrained by setting the engine speed to a small (low) engine speed when the occupant does not stay in the car or in the vicinity of the vehicle. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an engine control device, and more particularly to an engine control device including a filter member that collects exhaust particulates in an exhaust passage.

  2. Description of the Related Art Conventionally, in an engine such as a diesel engine, trapping is performed by a filter member (particulate filter) disposed in an exhaust passage so that exhaust particulates (particulates) such as carbon contained in exhaust gas are not released to the atmosphere. To be done.

When the amount of exhaust particulates collected by the filter member reaches a saturation capacity that can be collected, the collected exhaust particulates are burned to regenerate the filter function. In Patent Document 1, a warning lamp for urging regeneration is lit when the filter member comes to the regeneration timing, and when the occupant manually operates the regeneration start switch while the warning lamp is lit, the fuel injection amount is set for a predetermined time. It is disclosed that by increasing the amount, the idling speed, that is, the exhaust gas temperature is increased, and the exhaust particulates collected by the filter member are burned and removed.
Japanese Patent Laid-Open No. 4-86319

  As described above, when the filter member is regenerated (manual regeneration) while the engine is running while the vehicle is stopped, the exhaust gas that opens the exhaust gas of the engine to the atmosphere is considerably hot (high heat) exhaust gas. Will be discharged. In other words, during manual regeneration, a passing person or the like may inadvertently approach the exhaust port and receive heat damage that is exposed to high-temperature exhaust gas.

  In order to prevent the heat damage, it is conceivable to set the engine speed at the time of manual regeneration to a relatively small speed to suppress the increase in the exhaust gas temperature. It takes longer time to replay. In other words, the waiting time of the driver until the regeneration is finished becomes longer, which may lead to a situation where the driver avoids positive manual regeneration, which is not preferable.

  The present invention has been made in consideration of the above-described problems, and its purpose is to shorten the regeneration time of the filter member performed while the engine is operating in a stopped state as much as possible, and to prevent people passing by. It is an object of the present invention to provide an engine control device that can satisfy both the prevention of a situation where it is easily damaged by heat at a high level.

In order to achieve the above object, the present invention provides the following as a first solution. That is, as described in claim 1 in the claims,
A filter member disposed in the exhaust passage of the engine and collecting exhaust particulates in the exhaust gas;
A collection amount detecting means for detecting a parameter related to the collection amount of exhaust particulates collected by the filter member;
A manual regeneration switch that is manually operated by an occupant and gives a command to start regeneration of the filter member;
Stop detection means for detecting that the vehicle is stopped;
Manual regeneration instruction means for instructing the occupant to perform manual regeneration when the collection amount of the exhaust particulate detected by the collection amount detection means is equal to or greater than a predetermined value and the stop of the vehicle is detected by the stop detection means. When,
When the manual regeneration switch is operated to start manual regeneration during the manual regeneration instructing instruction by the manual regeneration instructing means, the engine is rotated at a predetermined speed to increase the temperature of the exhaust gas flowing into the filter member. Manual regeneration means for regenerating the filter member by burning and removing the exhaust particulate collected by the filter member by controlling to
Occupant detection means for detecting the presence or absence of an occupant in the passenger compartment or near the vehicle;
When it is detected by the occupant detection means that no occupant is present, compared to a case where it is detected that there is an occupant, the predetermined rotational speed setting means for setting the predetermined rotational speed to a smaller rotational speed; and
As provided.

In order to achieve the above object, the present invention provides the following as a second solution. That is, as described in claim 2 in the scope of claims,
A filter member disposed in the exhaust passage of the engine and collecting exhaust particulates in the exhaust gas;
A collection amount detecting means for detecting a parameter related to the collection amount of exhaust particulates collected by the filter member;
The filter member when the collected amount of exhaust particulates detected by the collected amount detection means is equal to or greater than a first predetermined value and when a predetermined automatic regeneration condition including that the vehicle is running is satisfied Automatic regeneration means for regenerating the filter member by changing the control mode of the engine to raise the temperature of the exhaust gas flowing into the exhaust gas, thereby burning and removing exhaust particulates collected by the filter member;
A manual regeneration switch that is manually operated by an occupant and gives a command to start regeneration of the filter member;
Stop detection means for detecting that the vehicle is stopped;
The collection amount of exhaust particulates detected by the collection amount detection means is not less than a second predetermined value set to a value larger than the first predetermined value, and the stop of the vehicle is detected by the stop detection means. Manual regeneration instruction means for instructing the passenger to manually regenerate,
When the manual regeneration switch is operated to start manual regeneration during the manual regeneration instructing instruction by the manual regeneration instructing means, the engine is rotated at a predetermined speed to increase the temperature of the exhaust gas flowing into the filter member. Manual regeneration means for regenerating the filter member by burning and removing the exhaust particulate collected by the filter member by controlling to
Occupant detection means for detecting the presence or absence of an occupant in the passenger compartment or near the vehicle;
When it is detected by the occupant detection means that no occupant is present, compared to a case where it is detected that there is an occupant, the predetermined rotational speed setting means for setting the predetermined rotational speed to a smaller rotational speed; and
As provided.

According to the first solution and the second solution, when there is an occupant in the vehicle compartment or in the vicinity of the vehicle, the engine speed when performing regeneration by the manual regeneration means is set to a large number of revolutions. Playback will be done promptly. In addition, passengers in the vehicle compartment or in the vicinity of the vehicle can be alerted so that people passing by do not inadvertently approach the exhaust port, so the engine speed is set to a high value and the exhaust gas temperature is high. However, it is possible to prevent the passing person from being damaged by heat.
On the other hand, when there is no occupant in the vehicle interior or in the vicinity of the vehicle, the engine speed when the regeneration by the manual regeneration means is set to a low speed, so that the exhaust gas temperature is prevented from becoming too high. Therefore, it is possible to prevent heat damage to people passing by.
In particular, according to the second solution, the second predetermined value serving as the regeneration start determination threshold value by the manual regeneration means is set in addition to the regeneration of the filter member while the vehicle is running by the automatic regeneration means. Since the automatic regeneration means is set to a value larger than the first predetermined value, which is the regeneration start determination threshold value, so that the regeneration by the automatic regeneration means is facilitated, the engine is operated in a stopped state. On the other hand, the frequency of regenerating the filter member by the manual regenerating means is greatly reduced, which is more preferable for preventing heat damage and eliminating the trouble of performing manual regeneration.

A preferable aspect based on at least one of the first solution technique and the second solution technique is as described in claim 3 and the following claims. That is,
Moving object detection means for detecting a moving object around the vehicle;
An internal alarm means for issuing an alarm to an occupant when a moving object is detected by the moving object detection means during reproduction by the manual regeneration means;
Can be further provided (corresponding to claim 3). In this case, the occupant need only be alerted to prevent thermal damage only when an alarm is received without paying attention to the surroundings of the vehicle, which is preferable in reducing the burden on the occupant.

Moving object detection means for detecting a moving object around the vehicle;
External alarm means for issuing an alarm to the surroundings of the vehicle when a moving object is detected by the moving object detection means during reproduction execution by the manual regeneration means;
Can be further provided (corresponding to claim 4). In this case, a warning is issued for a moving object such as a person passing by around the vehicle, so that even when there are no passengers in the vehicle interior or in the vicinity of the vehicle, it is possible to more reliably prevent heat damage to the person passing by. It will be.

Moving object detection means for detecting a moving object around the vehicle;
An internal alarm means for issuing an alarm to an occupant when a moving object is detected by the moving object detection means during reproduction by the manual regeneration means;
External alarm means for issuing an alarm to the surroundings of the vehicle when a moving object is detected by the moving object detection means during reproduction execution by the manual regeneration means;
Can be further provided (corresponding to claim 5). In this case, the advantages corresponding to claims 3 and 4 can be obtained together.

  A brake lamp may be set as the external alarm means, and the brake lamp may be lit or blinked during regeneration by the manual regeneration means (corresponding to claim 6). In this case, an external alarm means can be configured using an existing brake lamp, which is preferable not only for cost reduction, but also can be effectively notified by a highly visible brake lamp.

  It can be set so that the alarm by the external alarm means is continuously performed until a predetermined time elapses after the regeneration by the manual regeneration means is completed (corresponding to claim 7). In this case, even after the manual regeneration is completed, the exhaust port itself and the exhaust gas exhausted from the exhaust port are still at a high temperature. Therefore, the notification using the brake lamp is continued for a predetermined time after the manual regeneration is completed. Therefore, it is preferable for more effectively preventing heat damage.

  When stopping of the vehicle is not detected during the regeneration by the manual regeneration means, the alarm of the external alarm means can be stopped simultaneously with the end of the regeneration by the manual regeneration means (claim) 8). In this case, useless notification when the vehicle is traveling can be avoided, and it is preferable for promptly ensuring the original function of the brake lamp during traveling.

According to the first and second aspects of the present invention, it is possible to complete the regeneration of the filter member by the manual regeneration means performed while the vehicle is stopped in a short time as much as possible, and to prevent heat damage to persons passing by. This is also preferable.
In particular, according to the second aspect of the present invention, the frequency of regenerating the filter member by the manual regeneration means is reduced, and this is even more preferable in eliminating the trouble of heat damage and manual regeneration. .

  In FIG. 1, reference numeral 1 denotes a four-cylinder diesel engine, and an intake passage 2 and an exhaust passage 3 are connected to the diesel engine 1 (each cylinder). In the intake passage 2, the air cleaner 4, the air flow sensor 5, the blower 6 a of the VGT turbocharger (variable geometry turbo) 6, the intercooler 7, the intake throttle valve 8, A temperature sensor 9 and an intake pressure sensor 10 are provided. In the exhaust passage 3, a turbine 6 b of a VGT turbocharger (variable geometry turbo) 6, a movable vane 6 c that controls the flow rate of exhaust gas flowing into the turbine 6 b, and an oxidation catalyst are sequentially provided from the upstream side to the downstream side. 11, a filter member (particulate filter) 12 is disposed.

  Exhaust pressure sensors 13, 14 are disposed upstream and downstream of the filter member 12, and the exhaust accumulated (collected) on the filter member 12 based on the differential pressure between the exhaust pressure sensors 13, 14. It is configured to detect the amount of fine particles. The filter member 12 is provided with a temperature sensor 15.

  An intake passage 2 downstream of the intercooler 7 and an exhaust passage 3 upstream of the turbocharger 6 are connected by an exhaust gas recirculation passage 16. In this exhaust gas recirculation passage 16, a negative pressure actuator type exhaust gas recirculation valve 17 and a cooler 18 for cooling the exhaust gas with engine coolant are disposed.

  A fuel injection pump 19 supplies fuel from a fuel tank (not shown) to a common rail 20 as a pressure accumulating means. The common rail 20 is connected to a fuel injection valve 21 (only one is shown in FIG. 1) disposed in the combustion chamber 1a of each cylinder, and the common rail 20 includes a fuel injection pressure sensor 22 and a common rail 19 interior. A safety valve 23 is provided for opening the valve and relieving the fuel on the fuel tank side when the pressure of the fuel accumulated in the fuel tank exceeds the allowable pressure.

  In FIG. 1, reference numeral 50 denotes a control unit configured using a microcomputer. FIG. 2 shows an input / output relationship with respect to the control unit 50. In addition to the signals from the pressure sensors 13 and 14 described above, signals from the sensors 31 and 32 and 34 to 38 are input to the control unit 50. 31 is a vehicle speed sensor for detecting the vehicle speed. Reference numeral 32 denotes a sensor for detecting a moving object such as a passing person, and for example, a sensor (radar) using microwaves or infrared rays can be used. Reference numeral 34 denotes an engine speed sensor that detects the engine speed. Reference numeral 35 denotes a manual regeneration switch that instructs manual regeneration (start) by manual operation. 36 is a portable key for keyless entry, which exchanges information with the vehicle wirelessly and detects the separation of the occupant when the occupant is separated from the vehicle by a predetermined distance (for example, 3 m) with the portable key. The door is automatically locked. Reference numeral 37 denotes a sensor that detects the presence or absence of an occupant in the passenger compartment, and is constituted by, for example, a seating sensor mounted on a seat. The seating sensor 37 can be provided only on the driver's seat as long as it detects the presence / absence of the driver. However, when detecting the presence / absence of an occupant not limited to the driver, the seating sensor 37 is provided on all seats. May be provided. 38 detects the range position of the automatic transmission, and particularly detects the P (parking) range or N (neutral) range as a range position other than the traveling range position in order to detect a stop. ing.

  A control signal from the control unit 50 is output to the above-described fuel injection valve 21 and also to various actuators 41, 42, 44, 45. 41 urges the occupant to perform a manual operation to perform manual regeneration. In the embodiment, the vehicle interior lamp is instructed to urge manual regeneration by lighting (or blinking). 42 is a warning to the occupant that there is a moving object such as a passing person around the vehicle (internal alarm device), and is configured by lighting (or blinking) an appropriate lamp in the vehicle interior. Although it may be configured (however, it can be distinguished from the lamp 41), for example, it is preferable to perform an alarm by a sound of a buzzer or the like in order to effectively alert the alarm. 44 is a notification means for notifying an occupant that manual regeneration is in progress, and is configured by a lamp, a display screen, or the like. Reference numeral 45 denotes a brake lamp that serves as a notification means for notifying a moving object around the vehicle that manual regeneration is being performed.

  The brake lamp 45 is basically turned on when the brake pedal is depressed, but is turned on or blinked during manual regeneration as will be described later. While a pair of left and right brake lamps 45 are provided on the rear surface of the vehicle body, in the embodiment, an exhaust port of the engine is located between the left and right brake lamps 45 and is located at the rear of the vehicle body and is opened to the atmosphere toward the rear. Yes. Accordingly, since the brake lamps 45 exist on the left and right sides of the exhaust port, the notification effect (alarm effect) on the moving objects around the vehicle by the brake lamps 45 that are lit or blinked is considerably high. Become. In addition, the brake lamps 45 are not only provided in a pair of left and right at the rear end of the vehicle body, but are also generally provided at a high position in the middle of the pair of left and right brake lamps (a total of three brake lamps 45 are provided). The notification effect using the brake lamp 45 is extremely high.

  Each of the devices 41, 42, and 44, which serve as an alarm (notification) in the passenger compartment, uses an existing lamp, a dedicated lamp, a display screen of a navigation system, and a dedicated display screen. In addition, an appropriate method such as alarming (notifying) using any two or all of the lamp, sound, and display screen (particularly character display) can be used.

  Next, a method for regenerating the filter member 12 by changing the control state of the engine 1 will be described. Regeneration is achieved by fuel injection control from the fuel injection valve 21, as will be described later. However, regeneration (opportunity to perform) of the filter member 12 is performed in the following two modes. The first regeneration is forced regeneration (automatic regeneration, which automatically performs regeneration of the filter member 12 when a predetermined regeneration condition is satisfied while the vehicle is running (during non-idle). Equivalent). The second regeneration is manual regeneration in which the filter member 12 is regenerated when the manual regeneration switch 35 is turned on when the vehicle is stopped (idle) (in the manual regeneration means in claims 1 and 2). Equivalent).

  In the automatic regeneration, assuming that the vehicle is traveling, the amount of collected exhaust particulates is larger than the first predetermined value A1 and a predetermined regeneration start condition is satisfied (for example, the vehicle speed is set as the predetermined vehicle speed). For example, when 30 km / h or more). As a predetermined regeneration start condition other than the vehicle speed, for example, the engine speed is a predetermined rotation region (medium rotation region) excluding low rotation and high rotation, and instead of or in addition to this condition, the engine load is low It can also be set as being a predetermined load region (medium load region) excluding a high load. In short, the predetermined regeneration start condition is that the vehicle is running and the operating condition is such that the amount of injected fuel can be increased so that the exhaust gas temperature can be increased to the temperature required for regeneration. In addition to this, even if the amount of injected fuel for regeneration is increased, an operation state that does not have an adverse effect can be added as a regeneration start condition.

  In the above-described automatic regeneration (forced regeneration), as shown in FIG. 3A, a predetermined amount of post-injection (b1) in the expansion stroke after the main injection (a1) injected near the compression stroke top dead center. ) Is added. The exhaust gas temperature flowing into the filter member 12 can be increased by the post-combustion with the oxidation catalyst 11 by post-injection, the exhaust particulates collected by the filter member 12 can be burned and removed, and the filter member 12 is regenerated. can do.

  The manual regeneration described above is executed under the condition that the vehicle is stopped in a state where the amount of collected exhaust particulates is larger than the second predetermined value A2 (> first predetermined value A1). In manual regeneration, as shown by (a3) in FIG. 3B, the injection amount of the main injection injected near the compression stroke top dead center is increased by a predetermined amount from the normal injection amount (a2), for example, In addition to increasing the idling speed by an amount necessary to increase the idling speed from the normal idling speed (for example, 750 rpm) to the first target speed for manual regeneration (for example, 1750 rpm at a predetermined speed), FIG. ), A predetermined amount of post-injection (b2) is additionally executed in the expansion stroke after main injection (a3). This effectively increases the temperature of the exhaust gas flowing into the filter member 12 by the increase in the exhaust gas flow rate due to the increase in the main injection and the post-combustion in the oxidation catalyst 11 of the post-injection. The exhaust particulates collected by the combustion can be removed by combustion, and the filter member 12 can be regenerated. As will be described later, in the present invention, the first target rotational speed (predetermined rotational speed) is changed according to the presence or absence of an occupant in the vehicle interior or in the vicinity of the vehicle, and the manual regeneration is shortened when the occupant is present. The rotation speed is set to a large value (for example, 1750 rpm) so as to be completed in time, and when there is no occupant, the rotation speed is set to a small value (for example, 1400 rpm) to prevent heat damage to people passing by.

  Next, control for regenerating the filter member 12 by the control unit 50 will be described with reference to the flowcharts of FIGS. 4 and 5. In the following description, Q indicates a step. First, in Q1 of FIG. 4, after signals from various sensors, switches, etc. are read, in Q2, the amount X of collected exhaust particulates collected by the filter member 12 is detected. The amount of collection is detected by, for example, looking at the difference in detected pressure between the pressure sensors 13 and 14.

  In Q3, it is determined whether or not the collection amount X is larger than the first predetermined value A1. The first predetermined value A1 is a threshold value for determining whether or not the filter unit 12 should be regenerated during traveling. If the determination in Q3 is NO, the process returns to Q1. If YES in Q3, it is determined in Q4 whether the trapped amount X is greater than the second predetermined value A2. The second predetermined value A2 is set to a value larger than the first predetermined value A1, and a threshold value for determining whether or not the filter member 12 should be regenerated while the vehicle is stopped. Become.

  When the determination in Q4 is NO, the trapped amount X is when the filter member 12 is to be regenerated during traveling. At this time, in Q5, it is determined whether or not the vehicle speed is higher than a predetermined value (for example, 30 km / h) in order to confirm whether or not the regeneration start condition is satisfied. If NO in Q5, the exhaust gas temperature required for regeneration of the filter member 12 is unlikely to be sufficiently increased even when the vehicle is running, or the engine (vehicle) is in operation. Returning to Q1, assuming that there is a possibility of having an adverse effect.

  If YES in Q5, automatic regeneration of the filter member 12 is executed in Q6. That is, in Q6, fuel injection from the fuel injection valve 21 is executed in the manner shown in FIG. As a result, the exhaust gas temperature is raised and the exhaust particulates collected by the filter member 12 are burned and removed.

  After Q6, it is determined in Q7 whether the trapped amount X is smaller than the third predetermined value A3. The third predetermined value A3 serves as a threshold value for determining whether or not the automatic regeneration of the filter member 12 is to be terminated, and is set to a value smaller than the first predetermined value A1 and the second predetermined value A2. It is set (it can also be set to 0). If the determination in Q7 is NO, the process returns to Q5. If YES in Q7, automatic reproduction is terminated in Q8.

  When the determination in Q4 is YES, the collection amount X is in a state where it has increased to an amount for which manual regeneration should be executed. At this time, the process proceeds to Q11 in FIG. 5 to determine whether or not the vehicle is stopped. In this embodiment, it is determined that the vehicle is stopped when the vehicle speed is 0 and the range position of the automatic transmission is the P range position. In addition to this, the determination that the vehicle is stopped can be appropriately set by adding a condition that the parking brake lever is operated. When the transmission is a manual transmission, for example, it can be set to determine that the vehicle is stopped when the vehicle speed is 0, the shift position is neutral, and the parking brake lever is operated.

  If YES in Q11, it is determined in Q12 whether manual regeneration is currently being performed. When the determination in Q12 is NO, that is, when manual regeneration is not being performed, in Q13, for example, the regeneration instruction lamp 41 is lit to urge the passenger to issue a manual regeneration command. Other methods for prompting the reproduction instruction include, for example, lighting or blinking an existing room, using a dedicated lamp, displaying characters on a display screen such as a navigation system, or using voice guidance. Any appropriate method can be adopted.

  After Q13, it is determined in Q14 whether or not the manual regeneration switch 35 is turned on. That is, it is determined whether or not there has been a command operation for starting the manual regeneration by the passenger. If the determination in Q14 is NO, the process returns as it is. If YES in Q14, it is determined in Q15 whether or not there is an occupant in the passenger compartment based on the signal from the seating sensor 37. If YES in Q15, that is, if there is an occupant in the passenger compartment, a predetermined rotation speed (target rotation speed) that is the engine rotation speed during dynamic regeneration is large rotation speed A (for example, 1750 rpm) in Q16. Set to On the other hand, when the determination in Q15 is NO, that is, when there is no occupant in the vehicle compartment, in Q17, the predetermined rotation speed (target rotation speed) that becomes the engine rotation speed during manual regeneration is the predetermined rotation speed. The rotation speed B is set to be smaller than the number A (for example, 1400 rpm).

  After Q16 or Q17, the process shifts to Q18. In Q18, manual regeneration is executed, and a notification for notifying the passenger that manual regeneration is being performed is performed (operation of the notification unit 44). In the manual regeneration, the fuel injection from the fuel injection valve 21 is performed in the manner shown in FIG. 3B, the exhaust gas temperature is increased, and the exhaust particulates collected by the filter member 12 are burned and removed. To do. In addition, to notify the passenger that manual regeneration is in progress, for example, an existing lamp in the passenger compartment is turned on or blinked, a dedicated lamp is used, characters are displayed on the display screen, or voice guidance is used. Appropriate methods can be adopted. The engine speed at the time of manual regeneration is operated (feedback control) so as to be the predetermined speed (A or B). That is, when the passenger is present in the passenger compartment, the engine speed is set high, so that manual regeneration is completed in a short time. On the other hand, when there are no passengers in the passenger compartment, the engine speed for manual regeneration is set to a low speed, so the rise in the exhaust gas temperature is suppressed to a relatively low temperature, and the heat to the passing person etc. Damage prevention will be planned.

  After Q18, it is determined in Q19 whether the trapped amount X is smaller than the fourth predetermined value A4. The fourth predetermined value A4 is a threshold value for determining whether or not to end the manual regeneration, and is a value smaller than the second predetermined value A2 as the determination threshold value for starting the manual regeneration described above. Is set to In the embodiment, such a fourth predetermined value A4 is set to a value smaller than the third predetermined value A3 that is used for determining the end of automatic regeneration in order to sufficiently regenerate the filter member 12 by manual regeneration. is there. Of course, the fourth predetermined value A4 can be set to the same size as the third predetermined value A3 (it can also be set to 0).

  If manual regeneration is not sufficiently performed, the determination in Q16 is NO and the process returns to Q11. The determination in Q12 after returning to Q11 is YES, and at this time, the process proceeds to Q15 without passing through Q13 and Q14, and the manual regeneration is continuously executed.

  If manual regeneration at Q18 continues to be performed, the determination at Q19 will eventually become YES. At this time, the routine proceeds to Q20, where manual regeneration is terminated (fuel injection returns to the normal mode), and the lamp 44 that informs the occupant that manual regeneration is in progress is turned off.

  When the determination in Q11 is NO, the manual regeneration execution condition is not satisfied (there is both a state where manual regeneration is not yet performed and a state where manual regeneration is being performed). At this time, the process proceeds to Q21 to determine whether or not manual regeneration is being performed. If NO in Q21, this means that manual regeneration has not yet started, and the process returns as it is. If YES in Q21, manual regeneration is in progress, so in Q22, manual regeneration is terminated (fuel injection returns to the normal mode), and the lamp 44 indicating that manual regeneration is in progress is turned off.

  FIG. 6 shows another control example of the present invention and corresponds to the flowchart of FIG. The feature of the control example of FIG. 6 is that when a moving object such as a passing person is detected during manual regeneration, the brake lamp 45 is turned on (or flashes) as an external alarm means, and an alarm device as an internal alarm means 42 is used to warn the passenger.

  Based on the above, Q31 to Q38 in FIG. 6 are contents corresponding to Q11 to Q18 in FIG. In FIG. 6, after Q38 which is a step of executing manual regeneration, it is determined in Q39 whether or not there is a moving object such as a passing person around the vehicle based on the signal from the sensor 32 ( The sensor 32 is mainly set to detect the presence or absence of a moving object in the vicinity of the exhaust port, but may be a sensor that detects a moving object around or around the entire vehicle). When the determination in Q39 is NO, the processing of Q40 and Q41 is performed, but the processing of Q40 and Q41 corresponds to Q19 and Q20 of FIG.

  If the determination in Q39 is YES, that is, if there is a moving object around the vehicle, the brake lamp 45 is turned on as an external alarm means to alert the vehicle surroundings in Q42, and the passenger in the passenger compartment In order to alert the presence of a moving object around the vehicle, an alarm device 42 as an internal alarm means is activated. As described above, the alarm device 42 can perform alarms using any one of lamps, sounds (including voice guides), display screens, etc., any two combinations, or all three. However, it is preferable to use an alarm including a sound in order to enhance the effect of alerting the occupant.

After Q42, the determination process of Q43 is performed, which is a process corresponding to Q19 of FIG. If YES in Q43, the process of Q44 related to the end of manual regeneration is performed. This Q44 is processing corresponding to Q20 of FIG. 5 and Q41 of FIG. 6, but as a result of passing through the processing of Q42, in addition to the end of manual regeneration and the end of notification to the occupant that regeneration is in progress Then, the brake lamp 45 is turned off (external alarm is released) and the alarm is released to the passenger. However, exhaust gas having a higher temperature than normal is exhausted for a while after the manual regeneration ends, and the exhaust port itself is considerably hot for a while. After a lapse of time (for example, 30 seconds), the brake lamp 45 is turned off as an external alarm and the alarm of the alarm device 42 is released as an internal alarm. Although it is conceivable that the engine 1 is automatically stopped simultaneously with the end of manual regeneration, even in this case, the turning off of the brake lamp 45 and the release of the alarm of the alarm device 42 are not performed simultaneously with the engine stop, but from the engine stop. It is preferable that the setting is made after a predetermined time has elapsed (because the exhaust port itself is maintained at a considerably high temperature even after the engine is stopped).

  When the determination of Q31 is NO, the processing of Q45 and Q46 is performed, which is processing corresponding to Q21 and Q22 of FIG. However, in Q46, in consideration of the case where the processing in Q42 is performed, in addition to the end of manual regeneration and the end of notification to the passenger that manual regeneration is in progress, the brake lamp 45 is turned off, The alarm device 42 is configured to cancel the alarm. Note that the turning off of the brake lamp 45 and the release of the alarm of the alarm device 42 at Q46 are in a state where the vehicle is currently traveling or immediately shifts to traveling, and the exhaust gas discharged from the exhaust port is still at a high temperature. On the other hand, in order to ensure the original function of the brake lamp 45 during traveling, it is performed simultaneously with the end of manual regeneration.

  Although the embodiment has been described above, the present invention is not limited to this, and includes the following cases, for example. The engine is not limited to a diesel engine, and can be applied to an engine of an appropriate type for discharging exhaust particulates such as a gasoline engine (particularly a direct injection gasoline engine with exhaust particulates). The first predetermined value A1 serving as the automatic regeneration start determination threshold value and the second predetermined value A2 serving as the manual regeneration start determination threshold value can also be set to the same value, and the first predetermined value A1 is set to the second predetermined value. Although it can be set to a value larger than the value A2, setting the second predetermined value A2 to a value larger than the first predetermined value A1 increases the chance (frequency) of performing automatic regeneration during traveling as much as possible. Therefore, it is preferable in reducing the opportunity (frequency) of performing manual regeneration.

  During the transition from Q4 in FIG. 4 to Q11 in FIG. 5 (Q21 in FIG. 6), a separate step for determining whether or not the vehicle is traveling is provided, and if it is determined that the vehicle is traveling, the process proceeds to Q5. On the other hand, it may be set to shift to Q11 (Q21) when it is determined that the vehicle is not traveling (automatic regeneration if the vehicle is traveling even when the collection amount X is larger than the second predetermined value A2). To ensure that there is an opportunity to carry out the vehicle-taking into account that some passengers avoid manual regeneration due to annoyance).

  As a method for notifying a moving object around the vehicle that manual regeneration is being performed (a configuration method of the notification unit), for example, the following method may be used. You may make it alert | report using the lighting (or blinking) of the existing vehicle width light and hazard lamp which are arrange | positioned at four corners of a vehicle. In this case, the lamps at all four corners can be turned on (flashing), but at least the pair of left and right (front and rear) lamps can be turned on (flashing) across the exhaust port. That is, usually in a passenger car or a small car, the exhaust port is located at the rear of the vehicle body (generally, it is opened toward the rear of the vehicle body), so at least a pair of left and right sides sandwiching the exhaust port. It is preferable to turn on (flash) the vehicle width light or hazard lamp (it is preferable to turn off the vehicle width light and hazard lamp at the front of the vehicle body, but it is also possible to turn on or blink). Similarly, in trucks, particularly large trucks, the exhaust port is often located on the side of the vehicle body (opens toward the side of the vehicle body). In this case, the exhaust port is located on the front and rear sides of the exhaust port. In addition, a pair of front and rear vehicle width lights or hazard lamps on the side of the vehicle body on the same side as the exhaust port may be turned on (flashing) (a pair of front and rear vehicle widths on the side of the vehicle body opposite to the exhaust port) It is preferable to turn off the light or hazard lamp, but it is also possible to turn it on or blink.)

  In addition to the above, a method using a sound may be used as a method of notifying a moving object around the vehicle that manual regeneration is being performed (a configuration method of the notification unit). The simplest method is to operate a buzzer (horn). In addition to this, it is preferable to notify the fact that at least “the vicinity of the exhaust port is hot (high temperature)” by voice guidance, at least “the vicinity of the exhaust port is hot”. In particular, since many commercial vehicles such as trucks have already been generalized to inform the surroundings of the vehicle that the vehicle is traveling backwards (backward traveling) by voice, such as a speaker for traveling backwards. It is possible to effectively use the voice guidance as a notification during manual reproduction. Of course, a dedicated lamp may be provided in the vicinity of the exhaust port, and in this case, in addition to the lighting or blinking of the lamp, for example, a warning that the exhaust port is hot (high temperature) on the lamp surface. Character display and voice guidance as described above can be performed together (notification by both lamp and sound).

  The portable key 36 can also be used to determine whether there is an occupant, particularly a driver, in the passenger compartment or in the vicinity of the vehicle. In other words, the radio signal transmitted from the portable key 36 cannot be received when it is separated by a predetermined distance (for example, 3 m), and when the driver is in the passenger compartment, the received signal is very strong, and the driver is outside the passenger compartment but near the vehicle. Since the received signal is weak when the vehicle is in the vehicle, it is possible to detect the presence or absence of the driver in the vehicle interior or in the vicinity of the vehicle according to the sensitivity of the received signal.

The whole block diagram concerning the embodiment of the present invention. The figure which shows the input-output relationship with respect to a control unit. The figure which shows the fuel-injection aspect for exhaust-gas temperature rise. The flowchart which shows the example of control of this invention. The flowchart which shows the example of control of this invention. The flowchart which shows another example of control of this invention.

Explanation of symbols

1: diesel engine 3: exhaust passage 11: oxidation catalyst 12: filter member (particulate filter)
13, 14: Exhaust pressure sensor (exhaust particulate quantity detection means)
21: Fuel injection valve 31: Vehicle speed sensor (stop state detection means)
32: Moving object detection sensor 35: Manual regeneration switch (manual operation)
36: Mobile key (driver detection)
37: Seating sensor (occupant detection)
41: Manual regeneration instruction lamp (for notification to encourage manual regeneration)
42: Alarm device (internal alarm means)
44: Notification means for manual regeneration (for passengers)
45: Brake lamp (external alarm means)
50: Control unit

Claims (8)

A filter member disposed in the exhaust passage of the engine and collecting exhaust particulates in the exhaust gas;
A collection amount detecting means for detecting a parameter related to the collection amount of exhaust particulates collected by the filter member;
A manual regeneration switch that is manually operated by an occupant and gives a command to start regeneration of the filter member;
Stop detection means for detecting that the vehicle is stopped;
Manual regeneration instruction means for instructing the occupant to perform manual regeneration when the collection amount of the exhaust particulate detected by the collection amount detection means is equal to or greater than a predetermined value and the stop of the vehicle is detected by the stop detection means. When,
When the manual regeneration switch is operated to start manual regeneration during the manual regeneration instructing instruction by the manual regeneration instructing means, the engine is rotated at a predetermined speed to increase the temperature of the exhaust gas flowing into the filter member. Manual regeneration means for regenerating the filter member by burning and removing the exhaust particulate collected by the filter member by controlling to
Occupant detection means for detecting the presence or absence of an occupant in the passenger compartment or near the vehicle;
When it is detected by the occupant detection means that no occupant is present, compared to a case where it is detected that there is an occupant, the predetermined rotational speed setting means for setting the predetermined rotational speed to a smaller rotational speed; and
An engine control device comprising: A filter member disposed in the exhaust passage of the engine and collecting exhaust particulates in the exhaust gas;
A collection amount detecting means for detecting a parameter related to the collection amount of exhaust particulates collected by the filter member;
The filter member when the collected amount of exhaust particulates detected by the collected amount detection means is equal to or greater than a first predetermined value and when a predetermined automatic regeneration condition including that the vehicle is running is satisfied Automatic regeneration means for regenerating the filter member by changing the control mode of the engine to raise the temperature of the exhaust gas flowing into the exhaust gas, thereby burning and removing exhaust particulates collected by the filter member;
A manual regeneration switch that is manually operated by an occupant and gives a command to start regeneration of the filter member;
Stop detection means for detecting that the vehicle is stopped;
The collection amount of exhaust particulates detected by the collection amount detection means is not less than a second predetermined value set to a value larger than the first predetermined value, and the stop of the vehicle is detected by the stop detection means. Manual regeneration instruction means for instructing the passenger to manually regenerate,
When the manual regeneration switch is operated to start manual regeneration during the manual regeneration instructing instruction by the manual regeneration instructing means, the engine is rotated at a predetermined speed to increase the temperature of the exhaust gas flowing into the filter member. Manual regeneration means for regenerating the filter member by burning and removing the exhaust particulate collected by the filter member by controlling to
Occupant detection means for detecting the presence or absence of an occupant in the passenger compartment or near the vehicle;
When it is detected by the occupant detection means that no occupant is present, compared to a case where it is detected that there is an occupant, the predetermined rotational speed setting means for setting the predetermined rotational speed to a smaller rotational speed; and
An engine control device comprising: In claim 1 or claim 2,
Moving object detection means for detecting a moving object around the vehicle;
An internal alarm means for issuing an alarm to an occupant when a moving object is detected by the moving object detection means during reproduction by the manual regeneration means;
An engine control device further comprising: In claim 1 or claim 2,
Moving object detection means for detecting a moving object around the vehicle;
External alarm means for issuing an alarm to the surroundings of the vehicle when a moving object is detected by the moving object detection means during reproduction execution by the manual regeneration means;
An engine control device further comprising: In claim 1 or claim 2,
Moving object detection means for detecting a moving object around the vehicle;
An internal alarm means for issuing an alarm to an occupant when a moving object is detected by the moving object detection means during reproduction by the manual regeneration means;
External alarm means for issuing an alarm to the surroundings of the vehicle when a moving object is detected by the moving object detection means during reproduction execution by the manual regeneration means;
An engine control device further comprising: In claim 4 or claim 5,
A control apparatus for an engine, characterized in that a brake lamp is set as the external alarm means, and the brake lamp is turned on or blinked during regeneration by the manual regeneration means. In any one of Claims 4 thru | or 6,
The engine control device is set so that the alarm by the external alarm means is continuously performed until a predetermined time elapses after completion of the regeneration by the manual regeneration means. In claim 7,
The engine control device characterized in that, when the stop of the vehicle is not detected during the regeneration by the manual regeneration means, the alarm of the external alarm means is stopped simultaneously with the end of the regeneration by the manual regeneration means. .

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