JP4319583B2 - Control device for internal combustion engine - Google Patents

Description

  The present invention relates to a control apparatus for an internal combustion engine having an automatic stop / start function for controlling the internal combustion engine to automatically stop when idling and then to automatically start the internal combustion engine thereafter.

  2. Description of the Related Art Conventionally, an internal combustion engine mounted on a vehicle is automatically stopped and an internal combustion engine having an automatic stop start function for controlling the internal combustion engine to automatically start when a predetermined automatic start condition is satisfied after the automatic stop is provided. There has been proposed a control device that prohibits the automatic stop of the internal combustion engine until learning of a control value for control is completed (see, for example, Patent Document 1).

  In Patent Document 1, since the opportunity to learn the control value decreases when the automatic stop / start function works, the control value is determined by prohibiting the automatic stop / start function until the control value of the internal combustion engine is determined to be learned. It is possible to secure a sufficient learning opportunity and to improve the operation control performed based on the control value.

JP 11-107834 A

  By the way, the automatic stop / start function, for example, automatically stops during idling when the car stops due to traffic light, traffic jams, etc., and does not consume fuel until automatic start for starting, reducing fuel consumption and improving fuel efficiency. It is generally known that it is effective in reducing emissions and reducing emissions during idling.

  In general, for a vehicle equipped with an internal combustion engine, for example, from the time immediately after manufacture until a sufficient running-in operation is completed and a stable state is achieved, the learning value of the control value of the internal combustion engine is affected by the influence of friction change of the internal combustion engine. For example, the amount of change in the learning value of the learning value of the idle air amount is larger than the amount of change of the learning value in the learning opportunity after the break-in operation. Therefore, before the break-in operation of the internal combustion engine is completed, the learning value can be optimally updated as the learning opportunity period is shorter. On the other hand, when the running-in operation is completed, the change in the learning value of the control value is very small because the internal combustion engine is in a stable state, and a learning opportunity with a relatively long period is sufficient compared to before the completion of the running-in operation, and during the running-in operation Does not require learning opportunities at the same frequency. In this way, there are various learning opportunities that require control values depending on the state of the internal combustion engine.

  However, in the above-mentioned Patent Document 1, it is assumed that the learning completion state is uniformly reset every time the ignition switch is turned on, and no relearning determination is mentioned. In this case, for example, even when learning opportunities such as after the internal combustion engine is sufficiently operated are not required, the automatic stop function is prohibited until the learning is completed every time the ignition switch is turned on and the learning is not completed. There is a period. Therefore, every time the ignition switch is turned on, the automatic stop function is prohibited during this period, and the fuel consumption reduction and emission reduction effects cannot be obtained by the automatic stop start function.

  The present invention has been made to solve the above-described problems, and provides an optimal learning opportunity for the learning value of the control value for controlling the internal combustion engine according to the state of the internal combustion engine, to provide the control value. The control device for an internal combustion engine that makes it possible to improve the operation control performed based on the engine, prevent the unnecessary automatic stop function from being prohibited, and optimize the fuel consumption reduction effect and emission reduction effect by the automatic stop start function I will provide a.

The control device for an internal combustion engine according to the present invention automatically stops the internal combustion engine when a predetermined automatic stop condition is satisfied when the internal combustion engine mounted on the vehicle is idle, and the predetermined automatic start condition is set after the automatic stop. The automatic start / stop control means for controlling the internal combustion engine to automatically start, the learning control means for learning the control values of the various control systems of the internal combustion engine, and the learning update completion by the learning control means Update completion determining means for determining the automatic stop control means for limiting the automatic stop of the internal combustion engine by the automatic start / stop control means until the update completion determining means determines that the update is completed, and internal combustion after the update completion determination. A re-learning determination unit that determines a re-learning opportunity according to the state of the engine, and the re-learning by the learning control unit after the re-learning determination by the re-learning determination unit So as to be allowed, the decision value and the update completion determination after relearning determination means for determining learning opportunities used, set according to the history of learning the learning control means.

  According to the control apparatus for an internal combustion engine of the present invention, an operation performed based on the control value is provided by giving an optimal learning opportunity of the learning value of the control value in order to control the internal combustion engine in accordance with the state of the internal combustion engine. The control can be improved, and the fuel consumption reduction effect and emission reduction effect by the automatic stop / start function can be optimized.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

Embodiment 1 FIG.
1 is a block diagram showing a schematic configuration of an internal combustion engine control apparatus according to Embodiment 1 of the present invention.

  In FIG. 1, reference numeral 100 denotes an internal combustion engine control device mounted on a vehicle, and reference numeral 10 denotes an internal combustion engine electronic control unit (hereinafter referred to as an ECU).

  The ECU 10 is a logical operation centered on a CPU 11 as a central processing unit that executes various arithmetic processes, a ROM 12 that stores various control programs, a RAM 13 that stores various data, a backup RAM 14 (hereinafter referred to as B / U RAM), and the like. It is configured as a circuit.

  Here, the ROM 12 is a memory that stores various control programs and maps that are referred to when the various control programs are executed, and the CPU 11 performs arithmetic processing based on the various control programs and maps stored in the ROM 12. Execute. The RAM 13 is a memory for temporarily storing calculation results in the CPU 11, data input from each sensor, and the like, and the B / U RAM 14 is a nonvolatile memory for storing data to be stored when the control device is turned off. It is memory. The CPU 11, ROM 12, RAM 13, and B / U RAM 14 are connected via a bus 17 to an input port 15 for inputting detection signals from various sensors and an output port 16 for outputting control signals to various actuators. .

  An input port 15 of the ECU 10 has an ignition switch 21 for starting / stopping the internal combustion engine by a manual key operation, a rotational speed sensor 22 for detecting the rotational speed of the internal combustion engine, a vehicle speed sensor 23 for detecting the vehicle speed, and a manual transmission (not shown). ) Neutral switch 24 for detecting the neutral position, water temperature sensor 25 for detecting the cooling water temperature of the internal combustion engine, clutch upper switch 26 that is turned on when the clutch pedal (not shown) is lightly depressed, A clutch lower switch 27 that is turned on when fully depressed, a headlight switch 28 that turns on / off a headlight (not shown), and a heater fan switch 29 that drives a heater fan (not shown) of an air conditioner. , Turn signal switch 30 for blinking turn signal lamp (not shown) Radiator fan switch 31 to drive the radiator fan (not shown), an idle switch 32 for detecting the idling operation of the internal combustion engine, a battery 33 for supplying power is connected.

  Among these, the idle switch 32 is provided in a throttle valve (not shown) or the like of the internal combustion engine, and detects idle operation of the internal combustion engine based on the throttle opening.

  An output port 16 of the ECU 10 includes an igniter 41 that sparks a spark plug (not shown) of the internal combustion engine, an injector (fuel injection valve) 42 that injects and supplies fuel to the internal combustion engine, and an ignition switch 21 that is turned on or automatically started. A starter motor 43 for cranking the internal combustion engine by a start signal by control, an ISC (Idle Speed Control) valve 44 for adjusting an idle air flow rate, and the like are connected.

  Among these, the ISC valve 44 is provided in a bypass passage that bypasses the throttle valve of the internal combustion engine and intakes air, and adjusts the idle air flow rate during idling by opening and closing the bypass passage.

  Then, the control device 100 for the internal combustion engine inputs signals from the rotational speed sensor 22 and the vehicle speed sensor 23 to the ECU 10 and executes automatic stop / automatic start control during operation of the internal combustion engine.

  Next, the operation of the automatic start / stop control of the internal combustion engine according to the first embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a flowchart showing a processing procedure of automatic start / stop control by the CPU 11 in the ECU 10, FIG. 3 is an explanatory diagram showing an automatic stop condition of the internal combustion engine in FIG. 2, and FIG. 4 is a diagram of the internal combustion engine in FIG. It is explanatory drawing which shows an automatic start condition. The automatic start / stop control routine of FIG. 2 is repeatedly executed by the CPU 11 about every 10 [ms: milliseconds].

  In FIG. 2, first, in step S101, it is determined whether an automatic stop condition for the internal combustion engine is satisfied. Here, as the automatic stop condition of the internal combustion engine, for example, as shown in FIG. 3, “the engine speed detected by the speed sensor 22 is not more than a predetermined value”, “the neutral switch 24 is ON”, “water temperature sensor The cooling water temperature detected at 25 is greater than or equal to a predetermined value ”and“ the vehicle is in a stopped state ”are set. When all these conditions are satisfied, the process proceeds to step S102.

  In step S102, an ISC learning completion flag F1, which will be described later, is checked. If the learning completion flag is 1, that is, if the ISC learning is completed, the process proceeds to step S103. The flag F1 is a value stored in a predetermined area of the B / U RAM 14 described later, and the initial value is 0. The flag F1 is updated by a learning process routine shown in FIG. 5 and a relearning condition determination routine shown in FIG.

  In step S103, since the conditions for stopping the internal combustion engine are all set, the internal combustion engine is finally stopped. Here, as a procedure for stopping the internal combustion engine, the fuel injection amount is stopped (fuel cut), the internal combustion engine is stopped, and the internal combustion engine remains stopped until the automatic start condition of the internal combustion engine in step S104 is satisfied. .

  On the other hand, if the determination condition in step S101 is not satisfied, that is, if the automatic stop condition for the internal combustion engine is not satisfied, the process skips to step S104, and it is determined whether or not the automatic start condition for the internal combustion engine is satisfied. If the determination condition of step S102 is not satisfied, that is, if the ISC learning is not completed, the process skips to step S104, and it is determined whether the automatic start condition for the internal combustion engine is satisfied.

  Here, as the automatic start condition of the internal combustion engine, for example, as shown in FIG. 4, “the internal combustion engine is stopped” and “the clutch lower switch 27 is ON” are set. When all these conditions are satisfied, the internal combustion engine stop condition flag is changed from “ON” to “OFF”, assuming that the automatic start condition of the internal combustion engine is satisfied.

  The determination condition of step S104 is satisfied, that is, “the internal combustion engine is stopped”, “the clutch lower switch 27 is ON” and all the automatic start conditions of the internal combustion engine are satisfied, and the internal combustion engine stop condition flag is “OFF”. Sometimes it is determined that the start control of the internal combustion engine can be executed, and the process proceeds to step S105. An internal combustion engine start signal by automatic start is output to the starter motor 43, the internal combustion engine is started, and the process proceeds to step S106. In step S106, an automatic stop execution number counter CID is counted for ISC relearning determination to be described later, and this routine is terminated. The execution number counter CID is stored in a predetermined area of the B / U RAM 14 in order to store the number of automatic stops until it is cleared to 0 in the learning processing routine described later regardless of whether the ignition switch is turned on or off. The On the other hand, when the determination condition of step S104 is not satisfied, that is, when the internal combustion engine is stopped and at least one of the clutch lower switches 27 is not satisfied, it is determined that the automatic start condition of the internal combustion engine is not satisfied, and this routine ends. To do.

  As described above, according to the control apparatus 100 for an internal combustion engine of the present embodiment, the internal combustion engine is automatically stopped when a predetermined internal combustion engine stop condition is satisfied when the internal combustion engine is idle, and after this automatic stop Control is performed so that the internal combustion engine is automatically started when a predetermined internal combustion engine start condition is satisfied.

  Next, the execution procedure of the ISC learning control in the CPU 11 in the ECU 10 used in the control apparatus 100 for the internal combustion engine of the present embodiment will be described based on the flowcharts of FIGS. This learning processing routine is repeatedly executed by the CPU 11 about every 10 [ms: milliseconds].

  In FIG. 5, an ISC learning completion flag F1, which will be described later, is checked in step S201. If the learning completion flag F1 is 0, that is, if the ISC learning is not completed, the process proceeds to step S202. On the other hand, if the learning completion flag F1 is 1, it is determined that learning has been completed, the process proceeds to step S211, and a learning completion counter CLRNE described later is reset to 0 in step S211, and then the process skips to step S212 in FIG.

  Next, in step S202, it is checked whether an ISC learning condition is satisfied. For example, in step S202, the ECU 10 determines whether the internal combustion engine is sufficiently warmed based on the detection signal of the water temperature sensor 25, whether the vehicle is stopped based on the detection signal of the vehicle speed sensor, and the detection result of the idle switch. Based on the above, it is determined whether or not the engine is idling, and when it is determined that a predetermined condition for updating the ISC learning value is satisfied, the process proceeds to step S203. On the other hand, when it is determined that the predetermined condition for learning the ISC is not satisfied, the process proceeds to step S211, and after a learning completion counter CLRNE described later is reset to 0 in step S211, the process proceeds to step S212 in FIG. skip.

  Next, ISC learning value update processing is performed as processing in step S203. A general ISC control amount QISC is calculated by the following equation (1). Here, Qbse is the basic air amount, Qst is the correction amount at start-up, Qel is the electric load correction amount, Qfb is the rotation speed F / B (feedback) correction term, and Ql is the learning value.

QISC = Qbse + Qst + Qel + Qfb + Ql (1)

  The aforementioned rotational speed F / B correction term Qfb is, for example, in accordance with the difference between the target rotational speed of the internal combustion engine preset in the ROM 12 in the ECU 10 and the actual rotational speed of the internal combustion engine detected by the rotational speed sensor 22. This is a correction term for the ISC control amount obtained by the rotational speed F / B control performed so as to converge the actual rotational speed to the target rotational speed. Here, the shift of Qfb in the ISC control is reflected in the learning value Ql, and Ql is stored in a predetermined area of the B / U RAM 14. Since the learning value Ql is updated too early, there is a fear of erroneous learning. Therefore, the learning value Ql is updated periodically with a relatively small period and a small amount of updating per one time.

  Next, as a process of step S204, a reset process of the automatic stop execution counter CID of the internal combustion engine is performed. The counter CID counted up in step S106 in FIG. 2 is counted up for learning permission determination for relearning, and is reset to zero when learning processing is performed.

  Next, in step S205, it is determined whether or not the deviation ΔNe between the target rotational speed and the actual rotational speed is within N1 previously set in the ROM 12, that is, whether or not the F / B control has been performed accurately. When it is determined that | ΔNe | ≦ N1, the process proceeds to step S206.

  Next, in step S206, it is determined whether or not | Qfb | is within Q1 set in advance in the ROM 12. In general, when learning is not completed, that is, Ql is not updated to an appropriate value, Qfb tends to be a value far from “0”. As Ql is updated, Qfb approaches “0” and becomes stable. Therefore, if YES is determined in the determination process in step S206, it is determined that the learning value has been updated to an appropriate learning value, and the process proceeds to step S207.

  In step S207, a learning completion counter CLRNE for determining whether or not the state of | ΔNe | ≦ N1 determined in step S205 and the state of | Qfb | ≦ Q1 determined in step S206 continues for a predetermined time. Increment and move to step S208. Note that N1 is preset in the ROM 12 as a value that can accurately determine that the rotation speed F / B control has been performed, and Q1 is preset in the ROM 12 as a value that can be determined that the learning value has been properly updated. Has been.

  In step S208, it is determined whether or not the learning counter CLRNE is equal to or greater than T1. If it is determined that the counter CLRNE is equal to or greater than T1, that is, if the rotational speed F / B control is accurately performed and the state in which the learning value is properly updated continues stably, the process proceeds to step S209. In step S209, the learning completion flag F1 is set on the assumption that learning has been reliably performed in the ISC control. Note that T1 is preset in the ROM 12 as a value by which it is possible to determine that the learning value has been properly updated and the stable state has continued.

  Then, the process proceeds to step S210, and the learning history counter CLRN is counted up. The learning history counter CLRN is stored in a predetermined area of the B / U RAM 14 and has an initial value of 0. In other words, the learning history counter CLRN is the total number of times ISC learning has been completed since the internal combustion engine mounted on the vehicle started to operate, regardless of whether the ignition switch is turned on or off, and represents the history. The learning completion flag F1 is also stored in a predetermined area of the B / U RAM 14 and has an initial value of 0. Therefore, once learning is completed, 0 is not cleared until re-learning is permitted in step S216 in FIG.

  On the other hand, if it is determined in step S208 that the learning completion counter CLRNE is not equal to or greater than T1, that is, if it is determined that learning has not yet been performed, the process skips to step S212 in FIG.

  Next, the ISC relearning permission determination will be described with reference to FIG. In step S212, it is determined whether or not the learning history counter CLRN is B or more. That is, it is determined whether the number of learning completions after the internal combustion engine mounted on the vehicle is operated for the first time is greater than or less than the determination value B. If it is determined that the number of learning completions is greater than the determination value B, the process of step S213 is performed. Thus, the determination value 1 when the learning completion count set in advance in the ROM 12 is large is substituted for the automatic stop count determination value C, and the process proceeds to step S214. On the other hand, if it is determined that the number of learning completions is less than the determination value B, the determination value 2 (determination value 2 <determination) when the learning completion number set in the ROM 12 in advance in the determination value C in the process of step S216 is small. The value 1) is substituted and the process proceeds to step S214.

  In step S214, it is determined whether or not the internal combustion engine automatic stop execution counter CID is greater than the determination value C set in step S213 or step S216. That is, it is determined whether or not it is an optimal learning opportunity after learning is completed. If it is determined that the number of times of automatic stop execution CID of the internal combustion engine is larger than the determination value C, that is, it is an optimal learning opportunity, step S215 is performed. In the process, the flag F1 is set to 0, that is, relearning is permitted and this routine is terminated.

  Here, the optimal learning opportunity is an opportunity when the internal combustion engine is operated to some extent after learning is completed and learning is determined to be necessary. If the learning value is updated many times by repeating the above learning many times, more learning opportunities are not required than when the learning value is updated little. Therefore, the learning permission determination internal combustion engine automatic stop count determination value C is repeated according to the learning frequency in the determination in step S212.

  Next, the automatic start / stop control process of the internal combustion engine of FIG. 2 and the ISC learning control process of FIGS. 5 and 6 will be described with reference to the time chart of FIG.

  FIG. 7 is a time chart from the time when the internal combustion engine mounted on the vehicle is turned on for the first time. Here, as an example, the initial value of the learning value is set to a value larger than 0 in order to prevent a rotation drop during idling.

  In FIG. 7, the internal combustion engine is first started manually when the ignition switch is turned on (at time t0), and then learning of ISC is performed. After sufficient learning, it is determined that learning is complete (time t1). Even if the automatic stop condition is satisfied before time t1, it is not determined that the learning is completed before time t1, so the internal combustion engine does not automatically stop but automatically stops at time t1. Thereafter, the automatic start condition (at time t2) is satisfied, the internal combustion engine is automatically started, and the internal combustion engine is stopped when the ignition switch is turned off (at time t3).

In the prior art indicated by the broken line, the learning completion state is reset when the ignition switch is turned off (at time t3), and the automatic stop condition is set until the learning completion determination (time t6) after the next ignition switch is turned on (at time t4). Even if is established, since the automatic stop function is prohibited, the internal combustion engine does not automatically stop. In the prior art, this state continues every time the ignition switch is turned on and off.

  On the other hand, in the present embodiment indicated by the solid line, the learning completion state is stored regardless of whether the ignition switch is turned on or off. Therefore, the automatic stop is automatically performed until the predetermined number of times (the time t7) is reached. If the stop condition is satisfied, the automatic stop function works at that time, and the fuel consumption can be suppressed as compared with the conventional technique.

  In the present embodiment, although learning opportunities are less than in the prior art, it is generally known that the learning value will fluctuate in a minute amount in a relatively long cycle once it is learned. The internal combustion engine automatic stop execution determination value for permitting re-learning is set. Therefore, in the operation control of the internal combustion engine based on the learned value, a good operating condition can be obtained without a drop in engine speed or a blow-up as in the conventional technique.

  In addition, when a so-called internal combustion engine running-in operation is performed over a long period of time and the internal combustion engine is in a stable state, the number of updates of the learning value increases. If the learning value is updated many times by repeating the learning many times, the change of the learning value is reduced, and the learning opportunity is not required more than when the learning value is updated. Therefore, in the present embodiment, when the learning value is updated more frequently, the learning value can be learned without impairing the good driving situation by increasing the determination value of the number of times of automatic stop execution of the internal combustion engine that can obtain an optimal learning opportunity. Opportunities can be reduced. Instead, the amount of fuel consumption can be further suppressed by increasing the number of times of automatic stop.

  As described above, the control device 100 for the internal combustion engine according to the present embodiment automatically stops the internal combustion engine when the internal combustion engine mounted on the vehicle satisfies the predetermined automatic stop condition when the internal combustion engine is idle. Various sensor information for controlling the internal combustion engine to automatically start when a predetermined automatic start condition is satisfied, automatic start / stop control means achieved by the CPU 11 in the ECU 10, and ECU 10 for determining completion of update in learning control of ISC control The update completion determination means achieved by the CPU 11 in the CPU, the means for storing and holding the update completion determination, and the CPU 11 in the ECU 10 determining the optimum learning opportunity after the update completion determination. The internal combustion engine by the automatic start / stop control unit until the re-learning determination unit and the update completion determination unit determine that the update is complete An automatic stop limit means which is achieved by CPU11 in ECU10 to limit the automatic stop of those having a.

  In other words, according to the control apparatus for an internal combustion engine of the present embodiment, the automatic stop function is stopped to learn the optimal learning value until ISC learning is completed, and the internal combustion engine is automatically stopped after ISC learning is completed. By operating the function and stopping the learning function until the optimal learning opportunity is obtained regardless of the ignition key ON / OFF operation, the operation control with the optimal learning value of the internal combustion engine is improved and automatic The fuel consumption reduction effect and emission reduction effect by the stop / start function can be optimized.

  By the way, in the said embodiment, in order to determine the optimal learning opportunity, although the frequency | count of automatic stop execution was used, when implementing this invention, it is not limited to this, For example, warm-up operation is completed The same effect can be expected with other information that can be used to determine the optimal learning opportunity, that is, the opportunity for learning, in the number of operations, the operating time of the internal combustion engine, the number of start-ups, and fuel control.

  In the above embodiment, the relearning determination is described as being performed after the ignition switch is turned on and off a plurality of times. However, when the relearning condition is satisfied regardless of whether or not the ignition switch is operated. You may do it.

  Moreover, in the said embodiment, although the determination value for determining the optimal relearning opportunity according to the learning history was made into 2 values, a determination value is not limited to 2 values. In addition, in the above embodiment, the case where the number of learnings is increased and the determination value is set to a large value is described. However, when the number of learnings is increased in consideration of secular change or the like, a small value is set. Thus, an optimal relearning opportunity can be obtained by making settings according to the learning history.

  In the above embodiment, the learning history is described as the number of times learning has been completed. However, the present invention is not limited to this. For example, the learning update degree such as learning time may be set. If it represents, it can be applied and the same effect can be expected.

  Moreover, in the said embodiment, you may abbreviate | omit one of step S204, 205 of a learning process routine, and reduce the control load of ECU10. Similarly, the processing of steps S207, 208, and 212 may be omitted to reduce the control load on the ECU 10.

  By the way, in the above embodiment, ISC control has been described as a specific example of the control system. However, the present invention is not limited to this, and in addition to this, updating is performed by idle learning control. It can be applied to various required control systems, and the same effect can be expected.

  In the above embodiment, the manual transmission mounted on the vehicle has been described. However, the present invention is not limited to this and may be applied to an automatic transmission. And similar effects can be expected.

1 is a block diagram showing a schematic configuration of a control device for an internal combustion engine according to an embodiment of the present invention. FIG. It is a flowchart which shows the process sequence of the automatic start stop control of the internal combustion engine by embodiment of this invention. It is explanatory drawing which shows the internal combustion engine stop condition in the automatic start stop control of FIG. It is explanatory drawing which shows the internal combustion engine starting condition in the automatic start stop control of FIG. It is a flowchart which shows the learning processing procedure of the control system of the internal combustion engine by embodiment of this invention. It is a flowchart which shows the learning processing procedure of the control system of the internal combustion engine by embodiment of this invention. It is a time chart showing the learning opportunity of the control system of the internal combustion engine and the automatic start / stop timing of the internal combustion engine according to the embodiment of the present invention.

Explanation of symbols

10 ECU, 21 ignition switch, 22 speed sensor,
23 Vehicle speed sensor, 24 Neutral switch, 25 Water temperature sensor,
26 clutch upper switch, 27 clutch lower switch,
28 headlight switch, 29 heater fan switch, turn signal switch, 31 radiator fan switch, 32 idle switch, 33 battery,
41 igniter, 42 injector, 43 starter, 44 ISC valve.

Claims (7)

When the internal combustion engine mounted on the vehicle is idle, when the predetermined automatic stop condition is satisfied, the internal combustion engine is automatically stopped, and when the predetermined automatic start condition is satisfied after the automatic stop, the internal combustion engine is automatically started. Automatic start / stop control means for controlling
Learning control means for learning control values of various control systems of the internal combustion engine;
Update completion determining means for determining completion of learning update by the learning control means;
Automatic stop limiting means for limiting the automatic stop of the internal combustion engine by the automatic start / stop control means until it is determined that the update is completed by the update completion determination means;
Re-learning determination means for determining a re-learning opportunity according to the state of the internal combustion engine after the update completion determination,
Re-learning of the learning control unit is permitted after determination of the relearning opportunity by the relearning determination unit ,
A control apparatus for an internal combustion engine , wherein a determination value used by a relearning determination unit that determines a learning opportunity after the update completion determination is set according to a learning history of the learning control unit. The control apparatus for an internal combustion engine according to claim 1, wherein the update completion determination unit determines that the update is complete when a deviation of a feedback term in learning control of the learning control unit falls within a predetermined value. 2. The update completion determination unit according to claim 1, wherein the update completion determination unit determines that the update is completed when a deviation of the feedback term in the learning control of the learning control unit is within a predetermined value and a time of a predetermined value or more elapses. Control device for internal combustion engine. 2. The control device for an internal combustion engine according to claim 1, wherein the re-learning determination unit that determines a learning opportunity after the completion of the update determination determines that re-learning is permitted when the number of automatic stops exceeds a predetermined number. The control device for an internal combustion engine according to claim 1, wherein the relearning determination means for determining a learning opportunity after the update completion determination determines that relearning is permitted when the automatic stop time elapses a predetermined time or more. The re-learning determination means for determining a learning opportunity after the update completion determination determines that re-learning is permitted when the number of times the warm-up operation of the internal combustion engine is performed exceeds a predetermined value. Control device for internal combustion engine. 2. The control device for an internal combustion engine according to claim 1, wherein the re-learning determination unit that determines a learning opportunity after the update completion determination determines that re-learning is permitted when the number of start times of the internal combustion engine exceeds a predetermined value.

Images