JP2017002861A - Fuel injection time monitoring and controlling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a fuel injection time monitoring and controlling device for accurately detecting a difference between a fuel injection valve driving prescribed value and a fuel injection valve driving time and controlling a fuel injection time.SOLUTION: A fuel injection pulse width calculating part 108 calculates a first fuel injection pulse width and a fuel injection valve driving time. A fuel injection valve driving time abnormal determination part 114 compares the first fuel injection pulse width with the calculated first fuel injection valve driving time and determines whether or not a difference between them is within an optional set allowable difference. If the difference between both of them is not in the allowable difference, the fuel injection valve driving time abnormal determination part 114 determines whether or not the fuel injection is allowable. If the determination part allows the fuel injection, a fuel injection pulse width correction value calculating part 115 calculates a correction value for the second fuel injection pulse width in reference to a time difference between the first fuel injection pulse width and the first fuel injection valve driving time and the like, calculates a second fuel injection pulse width on the basis of the calculated fuel injection amount and multi-stage injection information and corrects a fuel injection pulse width.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a fuel injection control device that injects fuel into an internal combustion engine.

  In a fuel injection control apparatus for an internal combustion engine, a fuel injection valve drive driver generates a fuel injection valve drive signal based on a fuel injection time command value (fuel injection pulse width) calculated by a microcomputer, and based on the drive signal Thus, it is known to drive the fuel injection valve by energizing the fuel injection valve from the fuel injection valve drive driver.

  The fuel injection pulse width is calculated on the basis of the air-fuel ratio, engine speed, intake air amount to the cylinder, etc. according to the operating state.

  In recent years, exhaust regulations for internal combustion engines have become stricter. As one of countermeasures, for example, in a direct injection type internal combustion engine that directly injects fuel into a cylinder, one or more fuel injections are performed in one combustion cycle. Multistage injection control is performed.

  Also, a function for monitoring whether fuel injection is normally performed with respect to the required injection pulse width and detecting an abnormality is also required.

  For example, in Patent Document 1, in a control device in which an engine control unit (ECU) for calculating a fuel injection amount and a drive device for a fuel injection valve are configured separately, fuel injection pulse width calculated by the ECU and fuel from the drive device are calculated. A control device is described that compares the energization time to the injection valve and determines whether or not a command for the fuel injection valve is correctly performed.

  Moreover, there exists control described in patent document 2 as a prior art which detects operation | movement of fuel-injection-valve itself. According to Patent Document 2, it is known that a specific change of the drive current occurs in the opening / closing valve timing of the fuel injection valve, and an inflection point appears in the differential value of the displacement point by differentiating this change.

  In the control described in Patent Document 2, the opening and closing timing of the fuel injection valve is detected from the displacement point of the drive current input to the microcomputer, the time difference from the start of voltage application to the valve opening, and the voltage application The time difference from the end to the valve closing is calculated.

  A technology that can maintain the injection amount at the time of initial setting by correcting the fuel injection pulse width for a change caused by the deterioration or abnormality of the fuel injection valve with respect to the calculated opening / closing valve delay time. is there.

JP 2013-36344 A JP 2001-280189 A

  In fuel injection control, if there is a difference between the fuel injection pulse width and the fuel injection valve drive time, it will deviate from the required air-fuel ratio, leading to a reduction in exhaust performance. In the development stage, when a deviation from the required air-fuel ratio is detected, the behavior of the fuel injection valve is investigated, and there is a problem that it takes time to specify the factor.

  For this reason, it is required to accurately detect the difference between the fuel injection command value and the fuel injection valve drive time (fuel injection amount) and reduce the difference.

  However, since the technique described in Patent Document 1 detects an abnormality between the ECU and the fuel injection valve driving device and cannot monitor the operation of the fuel injection valve itself, The difference from the fuel injection valve drive time cannot be detected accurately.

  This is because the energization time does not coincide with the fuel injection valve drive time because a delay time occurs with respect to the energization start and end timing at the opening and closing timing of the fuel injection valve.

  The technique described in Patent Document 2 corrects the open / close valve delay time of the fuel injection valve with respect to the voltage application timing, and corrects the abnormality detection for the fuel injection pulse width or the excess or deficiency of the injection amount or the air-fuel ratio. It is not a thing.

  An object of the present invention is to realize a fuel injection time monitoring control device that accurately detects a difference between a fuel injection valve drive designation value and an actual fuel injection valve drive time and controls the fuel injection time from the fuel injection valve. It is to be.

  In order to achieve the above object, the present invention is configured as follows.

  In the fuel injection time monitoring and control device, a pulse signal corresponding to a fuel injection time command value indicating a time width of opening and closing of the fuel injection valve is output, and the opening timing and closing timing of the fuel injection valve are determined. Detecting and calculating the drive period of the fuel injection valve to determine whether or not the time difference between the time width and the drive period is within an allowable range. If the time difference is not within the allowable range, whether or not the time difference is within the injection permission range. When the fuel injection valve is within the injection permission range, the correction value of the pulse signal is calculated so that the drive period of the fuel injection valve becomes the time width, and the pulse signal corrected according to the calculated correction value is output. A fuel injection time control unit; and a drive driver that outputs a drive signal for the fuel injection valve based on a pulse signal output from the fuel injection time control unit.

  According to the present invention, a fuel injection time monitoring control device that accurately detects the difference between the fuel injection valve drive specified value and the actual fuel injection valve drive time and controls the fuel injection time from the fuel injection valve is realized. can do.

It is a whole block diagram of the monitoring control apparatus of the fuel injection time of this invention. It is an operation | movement flowchart of the control method in Example 1 of this invention. It is a time chart which shows the relationship between the fuel-injection pulse signal output from a microcomputer, and a fuel-injection valve position. It is the time chart which showed the pulse signal at the time of normal, the pulse signal at the time of abnormality detection, and the fuel injection valve behavior. It is operation | movement explanatory drawing of Example 2 of this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1
FIG. 1 is an overall configuration diagram of a fuel injection time monitoring control apparatus according to the present invention.

  In FIG. 1, the fuel injection time monitoring control device includes a microcomputer (microcomputer) 101 which is a fuel injection time control unit. The microcomputer 101 includes a multistage injection information calculation unit 106, a fuel injection amount calculation unit 107, Fuel injection pulse width calculation unit 108, fuel injection pulse width correction value calculation unit 115, fuel injection pulse width correction value learning unit (storage unit) 117, fuel injection valve drive time abnormality determination unit 114, fuel injection valve drive The determination result storage unit 116, the fuel injection valve drive time difference calculation unit 113, the fuel injection valve drive time calculation unit 112, and the fuel injection valve opening / closing valve timing detection unit 111 are provided.

  The fuel injection amount required in the cylinder of the internal combustion engine is calculated by the fuel injection amount calculation unit 107 based on the intake air amount 103, the engine speed 104, the water temperature 105, and the like input to the microcomputer 101.

  In the multistage injection information calculation unit 106, as described above, based on the intake air amount 103, the engine speed 104, the water temperature 105, and the like input to the microcomputer 101, the multistage injection frequency, the fuel injection amount split ratio, and the fuel The timing for starting injection is calculated.

  The fuel injection amount and the multistage injection information calculated by the fuel injection amount calculation unit 107 and the multistage injection information calculation unit 106 are supplied to the fuel injection pulse width calculation unit 108, and injection for each fuel injection performed a plurality of times during the multistage injection control. The quantity is calculated. The fuel injection pulse width calculation unit 108 receives the fuel pressure 102 and calculates the fuel injection pulse width based on the input fuel pressure 102 and the like.

  The fuel injection pulse width calculation unit 108 multi-stages injection of a pulse signal based on the calculated fuel injection pulse width (a pulse signal corresponding to a fuel injection time command value indicating a time width of opening and closing of the fuel injection valve). Output to the drive driver (fuel injection valve drive driver) 109 at the fuel injection start timing calculated by the information calculation 106.

  The drive driver 109 starts outputting a fuel injection valve drive signal (for example, drive current, drive voltage, etc.) to the fuel injection valve 110, and fuel injection based on the fuel injection pulse width calculated by the fuel injection pulse width calculation unit 108 Continue output for time. At this time, the rise of the pulse signal output to the drive driver 109 is the output start time of the drive signal, and the fall of the pulse is the output end time.

  The fuel injection valve drive signal output from the drive driver 109 is also supplied to the on-off valve timing detection unit 111 of the fuel injection valve.

  The fuel injection valve 110 starts to open and close in response to the drive signal output from the drive driver 109. From the rising (OFF → ON) and falling (ON → OFF) of the fuel injection pulse signal to the completion of the opening / closing valve. In this case, a delay time occurs (details will be described later with reference to FIG. 3).

  The on / off valve timing detection unit 111 of the fuel injection valve detects the on / off valve timing by detecting the displacement point of the fuel injection valve drive signal input from the drive driver 109. The detected opening / closing valve timing is input to the fuel injection valve driving time calculation unit 112, and the fuel injection valve driving time (fuel injection valve driving period) is calculated from the time difference of the opening / closing valve timing. The fuel injection valve drive time calculated by the fuel injection valve drive time calculation unit 112 is input to the fuel injection valve drive time difference calculation unit 113. The pulse signal from the fuel injection pulse width calculation unit 108 is input to the fuel injection valve drive time difference calculation unit 113.

  The fuel injection valve drive time difference calculation unit 113 calculates a time difference between the input fuel injection valve drive time and the fuel injection pulse width indicated by the pulse signal.

  The time difference calculated by the fuel injection valve drive time difference calculation unit 113 is input to the fuel injection valve drive time abnormality determination unit 114. The fuel injection valve drive time abnormality determination unit 114 compares the input time difference with an arbitrarily set time tolerance, and determines whether or not the time difference is within an allowable range, thereby determining the fuel injection valve drive time abnormality. . This determination will be described later with reference to FIGS.

  When the fuel injection valve drive time abnormality determination unit 114 determines that the fuel injection valve drive time is abnormal, the determination result is stored in the fuel injection valve drive determination result storage unit 116. The determination result of the fuel injection valve drive time abnormality determination unit 114 is also input to the fuel injection pulse width correction value calculation unit 115, and the fuel injection pulse width correction value calculation unit 115 calculates the fuel injection pulse width correction value.

  The fuel injection pulse width correction value calculation unit 115 includes, for example, the fuel injection valve drive time difference calculated by the fuel injection valve drive time difference calculation unit 113 and the fuel pressure used when the fuel injection pulse width calculation unit 108 calculates the pulse width. A correction value is calculated based on a difference between the fuel pressure 102 (current fuel pressure) used for calculating the fuel injection pulse width of the next fuel injection, and the like. The fuel injection valve drive time difference calculated by the fuel injection valve drive time difference calculation unit 113 is input from the fuel injection valve drive time difference calculation unit 113 to the fuel injection pulse width correction value calculation unit 115 via the fuel injection valve drive time abnormality determination unit 114. Shall be.

  Further, since the fuel pressure 102 changes depending on the fuel injection amount and the like, the fuel injection pulse width correction value calculation unit 115 stores the previous value of the fuel pressure 102.

  In the case of multi-stage injection control, subsequent fuel injection may be executed, so that the fuel injection pulse width to be executed next is corrected by the pulse width correction value calculated by the fuel injection pulse width correction value calculation unit 115. Regardless of whether or not the subsequent fuel injection pulse width is corrected, the fuel injection pulse width correction value calculation unit 115 supplies the calculated fuel injection pulse width correction value to the fuel injection pulse width correction value learning unit 117 as a learning value. Remember as. The learning value is intended to be used for correction other than the fuel injection pulse width immediately after the learning value, for example.

  Next, an example of the control method according to the first embodiment of the present invention will be described with reference to FIG. 2, FIG. 3, and FIG. Hereinafter, an example when the number of multistage injections is two will be described.

  FIG. 2 is an operation flowchart of the control method according to the first embodiment. In step S201 of FIG. 2, the fuel injection amount calculation unit 107 calculates the fuel injection amount. Next, in step S202, the multistage injection information calculation unit 106 calculates multistage injection information. In the first embodiment, the multistage injection information is calculated as two multistage injections, and the fuel injection pulse width division ratio is two (for example, 1: 1).

  Next, in step S203, the fuel injection pulse width calculator 108 calculates the first fuel injection pulse width of the two fuel injections based on the calculation results of steps S201 and S202.

  Next, in step S204, the fuel injection pulse width calculation unit 108 calculates the first fuel injection valve drive time. As described with reference to FIG. 1, the fuel injection valve 110 is driven by the fuel injection valve drive signal calculated based on the fuel injection pulse width, but the first fuel injection valve is output from the output fuel injection valve drive signal. Calculate the drive time.

  Next, in step S205, the fuel injection valve drive time abnormality determination unit 114 compares the first fuel injection pulse width calculated in step S203 with the first fuel injection valve drive time calculated in step S204. Then, it is determined whether or not the difference between the two is within an arbitrarily set tolerance. Details of this comparison method will be described later with reference to FIG.

  If the condition is satisfied according to the determination in step S205, that is, if the difference between the two is within the arbitrarily set tolerance, the process proceeds to step S206, and the fuel injection amount calculated in S201 and the process in S202 are performed. Based on the multistage injection information calculated in this way, the fuel injection pulse width calculator 108 calculates the second fuel injection pulse width.

  If the condition is not satisfied in step S205, that is, if the difference between the two is not within the arbitrarily set tolerance, the process proceeds to step S207, and the abnormality determination result is stored in the fuel injection valve drive determination result storage unit 116. . Thereafter, the process proceeds to step S208, and the fuel injection valve drive time abnormality determination unit 114 determines whether or not fuel injection is possible. In step S208, for example, when the fuel injection valve time calculated in step S204 is extremely short, or the like, a method for determining fuel injection prohibition can be considered. This is because when the calculated fuel injection valve time is not within the injectable range, a failure of the fuel injection valve 110 is considered.

  When the fuel injection is permitted in step S208, the process proceeds to step S209, where the fuel injection pulse width correction value calculation unit 115 performs the second time based on the time difference between the first fuel injection pulse width and the first fuel injection valve driving time. The correction value for the fuel injection pulse width is calculated.

  Next, proceeding to step S210, the fuel injection pulse width correction value learning unit 117 stores the calculated correction value. Thereafter, the process proceeds to step S206, and similarly to the above, the second fuel injection pulse width is calculated based on the fuel injection amount calculated in step S201 and the multistage injection information calculated in step S202, and in step S209. Based on the calculated second fuel injection pulse width correction value, the fuel injection pulse width is corrected.

  On the other hand, if the fuel injection is prohibited in S208, the process proceeds to step S211, and the fuel injection valve drive time abnormality determination unit 114 stores the fuel injection prohibition determination result in the fuel injection valve drive determination result storage unit 116, Proceeding to step S212, subsequent fuel injection is prohibited. For this fuel injection prohibition, the fuel injection valve drive time abnormality determination unit 114 outputs a fuel injection prohibition signal to the fuel injection pulse width calculation unit 108. The fuel injection pulse width calculation unit 108 outputs a pulse signal having a pulse width of 0 to the drive driver 109 or the like in response to the fuel injection prohibition signal.

  Next, a method for comparing the fuel injection valve drive time and the fuel injection pulse width will be described with reference to FIG.

  As described with reference to FIG. 1, the fuel injection valve 110 is driven according to the fuel injection valve drive signal output from the drive driver 109 based on the fuel injection pulse signal output from the microcomputer 101. FIG. 3 is a time chart showing the relationship between the fuel injection pulse signal 301 output from the microcomputer 101 and the fuel injection valve position 302.

  In FIG. 3, when the fuel injection pulse signal 301 is OFF, the fuel injection valve position 302 is in the valve closing position. The fuel injection pulse signal 301 becomes an ON signal when the fuel injection timing calculated by the microcomputer 101 is reached. At this time, the fuel injection valve position 302 starts the valve opening operation with a slight delay time from the time when the pulse signal 301 is turned ON (time T303). This is because a drive signal from the drive driver 109 is applied to the fuel injection valve 110 and it takes time until an electromotive force that can open the fuel injection valve 110 is generated.

  The fuel injection valve 110 that has started to open completes the valve opening operation at time T304. The fuel injection pulse signal 301 continues to be in the ON state for the fuel injection pulse width 309 and then becomes in the OFF state. At this time, the fuel injection valve position 302 is maintained in the open state by the residual magnetic force in the fuel injection valve 110, and therefore it takes time to shift to the valve closing operation. Therefore, the start of closing of the fuel injection valve 110 is time T305 delayed from the time when the fuel injection pulse signal 301 is turned OFF, and the valve closing completion time is T306.

  In the control according to the first embodiment of the present invention, the fuel injection valve drive time 304 (time T304 to T306) detected from the displacement point of the drive signal from the drive driver 109 and the fuel injection pulse width 309 (the fuel injection pulse signal is in the ON state). The time difference from the maintained time) is calculated. The calculated time difference is compared with a determination value set in advance. If it is within the allowable range, it is determined as normal, and if it is out of the range, it is determined as abnormal.

  Here, since the determination value includes individual differences of the fuel pressure and the fuel injection valve, an arbitrary tolerance is set.

  An example of the timing of the fuel injection pulse signal and the fuel injection valve behavior at this time will be described with reference to FIG.

  FIG. 4 is a time chart showing a pulse signal 401 at normal time, a pulse signal 402 at abnormality detection, and a fuel injection valve behavior 403.

  As described with reference to FIG. 2, the first fuel injection valve drive time 409 becomes shorter than the normal first fuel injection pulse width 404 in FIG. If the time difference between the two is equal to or larger than the arbitrarily set tolerance, it is stored as an abnormality determination (step S207 in FIG. 2).

  At this time, the time difference between the two is within the fuel injection permission range in step S208 of FIG.

  Since the fuel injection is within the permitted range, the second fuel injection is executed when the fuel injection is permitted. From the time difference between the first fuel injection pulse width 404 and the fuel injection valve driving time 409, the second fuel injection is executed. The fuel injection pulse width correction value 408 is calculated, and the second fuel injection is executed with the pulse width 407 corrected based on the correction value 408.

  In the calculation of the correction value 408, it is necessary to correct the fuel pressure difference used in the first and second fuel injection pulse width calculations as described with reference to FIG. Further, in the second fuel injection, the fuel injection valve 110 may not be able to operate normally. Therefore, the on-off valve delay time (the valve opening delay time 307 and the valve closing delay time 308) described in FIG. It is desirable to use the correction parameter for the fuel injection pulse width.

  For example, the open / close valve delay time of each cylinder is stored as a normal value when the fuel injection valve is driven, and the required fuel injection is corrected by correcting the difference between the normal time and the abnormal time of the valve opening delay time. A method of approaching the amount is conceivable.

  As described above, according to the first embodiment of the present invention, the pulse width of the pulse signal output from the fuel injection pulse width calculation unit 108 and the fuel injection valve drive signal output from the drive driver 109 to the fuel injection valve 110. If the calculated time difference is within the allowable range of injection, a correction value of the pulse signal for reducing the time difference is calculated, and the calculated correction value is calculated based on the calculated correction value. Since the corrected pulse signal is output to the drive drive bar 109, the difference between the fuel injection valve drive designation value and the actual drive time of the fuel injection valve is accurately detected, and the fuel injection from the fuel injection valve is detected. A fuel injection time monitoring control device for controlling time can be realized.

  If fuel injection is prohibited in step S208, the subsequent fuel injection is prohibited and a display unit (not shown) may indicate that there is a possibility of failure in the fuel injection valve 110 or the like. Is possible.

(Example 2)
Next, a second embodiment of the present invention will be described.

  The first embodiment of the present invention described with reference to FIGS. 2, 3, and 4 is a case where there is a subsequent fuel injection in one combustion cycle, but the second embodiment is the final fuel of the multistage injection. This is an example in the case where there is no subsequent fuel injection, such as in the case of injection or single fuel injection in one combustion cycle.

  Since the overall configuration of the fuel injection time monitoring and control apparatus according to the second embodiment is the same as that of the first embodiment, illustration and detailed description thereof are omitted. In addition, since the operation control flow below the fuel injection pulse width correction control described below is common to the first embodiment and the second embodiment, detailed description thereof is omitted.

  FIG. 5 shows a normal-time pulse signal 501 having a normal injection pulse width 504, a normal-time pulse signal 502 having abnormal pulse widths 505 and 506, and fuel injection when single-stage injection is performed. It is a figure explaining the relationship with the valve behavior 503. FIG. The abnormality determination method is the same as the abnormality determination method described with reference to FIG. 4 in the first embodiment, and a detailed description thereof will be omitted. However, the example illustrated in FIG. 5 corresponds to the fuel injection pulse width 504. An example in which it is detected that the fuel injection valve driving time 507 is short is shown.

  The time difference between the fuel injection pulse width 504 and the fuel injection valve drive time 507 is within the fuel injection permission range in step S208 shown in FIG. The presence or absence of subsequent fuel injection is detected at an arbitrary timing after the end of fuel injection, for example, by comparing the required value of the number of fuel injections with the execution value.

  As in this example, when there is no subsequent fuel injection, a method of adding a fuel injection pulse signal 509 having a pulse width 506 is possible. By adding a pulse signal 509 having a pulse width 506 to a pulse signal having a pulse width 505, the fuel injector behavior 503 adds a second fuel injector driving time 508 to the first fuel injector driving time 507. Valve operating time.

  Here, the pulse width 506 of the additional fuel injection pulse signal 509 can be calculated by the same calculation method as the correction value calculation of the pulse correction value 408 shown in FIG. This calculation is performed by the fuel injection pulse width correction value calculation unit 115 and instructs the fuel injection pulse width calculation unit 108 to output an additional pulse signal.

  In the second embodiment of the present invention, the same effect as in the first embodiment can be obtained, and the subsequent fuel injection can be performed, for example, in the case of the final fuel injection of the multistage injection or the fuel injection only once in one combustion cycle. The present invention can also be applied to the case where there is not.

  In the second embodiment, an example in which the number of multistage injections is two has been described. However, even when the number of multistage injections is different, the subsequent fuel injection pulse width can be corrected.

  The same control is also possible when there is a difference in the pulse width, such as when the fuel injection pulse width is longer than normal. As another correction method, correction to a fuel injection amount, a split ratio of the fuel injection pulse width, or the like can be considered.

  According to the fuel injection time monitoring and control apparatus of the present invention, it is possible to improve the investigation efficiency when an abnormality occurs by detecting abnormality of the fuel injection valve operation and performing failure diagnosis. Further, the air / fuel ratio in which excess or deficiency has occurred can be brought close to the required air / fuel ratio.

  Further, when the internal combustion engine has a plurality of cylinders each provided with a fuel injection valve, the fuel injection time monitoring control in the first or second embodiment of the present invention is executed for each cylinder. Is also possible.

  Note that the determination method and comparison method described in this specification are only examples of the present invention, and the present invention is not limited to the description method in the specification.

  DESCRIPTION OF SYMBOLS 101 ... Microcomputer (fuel injection time control part), 106 ... Multi-stage injection information calculation part, 107 ... Fuel injection amount calculation part, 108 ... Fuel injection pulse width calculation part, 109 ... Drive driver , 110... Fuel injection valve, 111... Fuel injection valve on / off valve timing detection unit, 112... Fuel injection valve drive time calculation unit, 113... Fuel injection valve drive time difference calculation unit, 114. Fuel injection valve drive time abnormality determination unit, 115 ... Fuel injection pulse width correction value calculation unit, 116 ... Fuel injection valve drive determination result storage unit, 117 ... Fuel injection pulse width correction value learning unit, 306 ... Valve closing delay time, 307 ... Valve opening delay time, 404 ... First injection pulse width in normal condition, 405 ... Second injection pulse width in normal condition, 406 ... In abnormal condition 1st injection pulse width, 407 ... different Second injection pulse width of time, 408 ... fuel injection pulse width correction, 409 ... first fuel injection valve drive time, 410 ... second fuel injection valve drive time, 504 ... normal Injection pulse width at the time, 505... First injection pulse width at the time of abnormality, 506... Additional injection pulse width at the time of abnormality, 507... First fuel injection valve drive time, 508. Fuel injection valve drive time, T303: valve opening start time, T304 ... valve opening time, T305 ... valve closing start time, T306 ... valve closing time

Claims (5)

A pulse signal corresponding to a fuel injection time command value indicating a time width of opening and closing of the fuel injection valve of the internal combustion engine is output, and the fuel injection valve detects the opening timing and the closing timing of the fuel injection valve. The valve drive period is calculated, and it is determined whether or not the time difference between the time width and the drive period is within an allowable range. If the time difference is not within the allowable range, it is determined whether or not the time difference is within an injection permission range. A fuel injection time control unit that calculates a correction value of the pulse signal so that the drive period of the fuel injection valve becomes the time width when within the permitted range, and outputs a pulse signal corrected according to the calculated correction value; ,
A drive driver that outputs a drive signal of the fuel injection valve based on the pulse signal output from the fuel injection time control unit;
A fuel injection time monitoring control apparatus comprising: The fuel injection time monitoring and control device according to claim 1,
The fuel injection time control unit is
A fuel injection pulse width calculation unit that outputs a pulse signal corresponding to a fuel injection time command value indicating a time width of opening and closing of the fuel injection valve of the internal combustion engine;
An on-off valve timing detection unit that detects a valve opening timing and a valve closing timing of the fuel injection valve based on a drive signal to the fuel injection valve according to the pulse signal;
A drive time calculation unit that calculates a drive period of the fuel injection valve from the valve opening timing to the valve closing timing detected by the opening / closing valve timing detection unit;
A driving time difference calculating unit that calculates a time difference between the time width based on the fuel injection time command value and the driving period calculated by the driving time calculating unit;
It is determined whether or not the time difference calculated by the driving time difference calculation unit is within an allowable range. If the time difference is not within the allowable range, it is determined whether or not the time difference is within an injection permission range, and a determination result is output. A drive time abnormality determination unit;
When the determination result of the drive time abnormality determination unit indicates that the time difference is within the injection permission range, the drive period of the fuel injection valve is the time width indicated by the fuel injection time command value. And a pulse width correction value calculation unit for calculating the correction value of the pulse signal,
The fuel injection time monitoring control apparatus, wherein the pulse width calculation unit outputs a pulse signal corrected according to the calculated correction value. In the fuel injection time monitoring and control device according to claim 2,
The drive time abnormality determination unit outputs a fuel injection prohibition signal to the fuel injection pulse width calculation when it is determined that the time difference is not within the allowable range and is not within the injection permission range. Fuel injection time monitoring and control device. In the fuel injection time monitoring and control device according to claim 2,
The fuel injection time control unit includes a pulse width correction value storage unit that stores a correction value of a pulse signal calculated by the pulse width correction value calculation unit as a learning value. . In the fuel injection time monitoring and control device according to claim 2,
When the time width is shorter than the drive period calculated by the drive time calculation unit, the pulse width correction value calculation unit adds a pulse signal having a pulse width corresponding to the calculated correction value of the pulse signal. The fuel injection time monitoring control device, wherein the fuel injection time width is output to the fuel injection pulse width calculation.

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