WO2014199667A1 - 内燃機関の制御装置および制御方法 - Google Patents
内燃機関の制御装置および制御方法 Download PDFInfo
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- WO2014199667A1 WO2014199667A1 PCT/JP2014/054411 JP2014054411W WO2014199667A1 WO 2014199667 A1 WO2014199667 A1 WO 2014199667A1 JP 2014054411 W JP2014054411 W JP 2014054411W WO 2014199667 A1 WO2014199667 A1 WO 2014199667A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/027—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions using knock sensors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D31/00—Use of speed-sensing governors to control combustion engines, not otherwise provided for
- F02D31/001—Electric control of rotation speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/021—Introducing corrections for particular conditions exterior to the engine
- F02D41/0215—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission
- F02D41/0225—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the gear ratio or shift lever position
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/04—Introducing corrections for particular operating conditions
- F02D41/06—Introducing corrections for particular operating conditions for engine starting or warming up
- F02D41/068—Introducing corrections for particular operating conditions for engine starting or warming up for warming-up
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/227—Limping Home, i.e. taking specific engine control measures at abnormal conditions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D2041/228—Warning displays
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2200/00—Input parameters for engine control
- F02D2200/02—Input parameters for engine control the parameters being related to the engine
- F02D2200/021—Engine temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D2250/00—Engine control related to specific problems or objectives
- F02D2250/18—Control of the engine output torque
- F02D2250/26—Control of the engine output torque by applying a torque limit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D35/00—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for
- F02D35/02—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions
- F02D35/023—Controlling engines, dependent on conditions exterior or interior to engines, not otherwise provided for on interior conditions by determining the cylinder pressure
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Definitions
- the present invention relates to a control device and a control method for an internal combustion engine that suppresses abnormal combustion caused by oil in a low speed and high load region of the engine in a spark ignition internal combustion engine.
- Patent Documents 1 and 2 disclose that when the conditions such as the amount of oil penetrating into the cylinder become conditions where abnormal combustion is likely to occur, A technique is disclosed in which the engine operating range is limited to avoid actual engine operation in a low speed and high load range where abnormal combustion is a problem.
- the low-speed and high-load region is set as a restricted region as described above and the actual engine operating conditions (torque and rotational speed) are restricted so as not to enter the region, abnormal combustion rarely occurs from various conditions. That is possible. If the restriction region is set to be too wide so as to reliably prevent such rare abnormal combustion, there is a concern that a shortage of torque may occur during vehicle acceleration or the like, which is not preferable. On the other hand, if the restricted region is excessively limited, abnormal combustion frequently occurs, which is not preferable.
- An internal combustion engine control apparatus includes: An operating range limiting means for limiting the actual engine operating conditions so as not to enter the limited range, having a limited range set in advance corresponding to a low speed and high load range where abnormal combustion caused by oil may occur; An abnormal combustion detecting means for detecting that the abnormal combustion actually occurs in a designated inspection region set on the low speed and high load side as an operation region wider than the restricted region; When the abnormal combustion is detected by the abnormal combustion detection means, the limit area variable setting means for expanding the limit area, It is configured with.
- the specified inspection area is generally set so as to include engine operating conditions in which abnormal combustion caused by oil can occur even in rare cases, and the restriction area can be variably set in a part of the low speed and high load side. Is set.
- the limit area is set to a certain range, the engine torque is limited or the shift line of the automatic transmission is shifted so that the actual engine operating condition does not fall within this limit area. Therefore, the internal combustion engine is operated under engine operating conditions other than the above-described restricted region. However, in the unlikely event that actual abnormal combustion is detected within the designated inspection region, the restricted region is expanded. . Thereby, frequent occurrence of abnormal combustion thereafter is suppressed.
- the restriction area when the abnormal combustion actually occurs, the restriction area is expanded. Therefore, the initial restriction area may be a relatively narrow area, and therefore, the torque shortage due to the excessive restriction area setting is prevented. In addition, it is possible to reliably prevent abnormal combustion from occurring continuously.
- FIG. 1 is a configuration explanatory view showing a system configuration of an embodiment in which the present invention is applied to an internal combustion engine 1 with a turbocharger.
- an internal combustion engine 1 composed of a spark-ignition gasoline engine of a four-stroke cycle has an intake passage 2 and an exhaust passage 3, and a compressor 5 of a turbocharger 4 is disposed in the intake passage 2 and an exhaust passage. 3, an exhaust turbine 6 of the turbocharger 4 is arranged.
- the exhaust turbine 6 includes a known waste gate valve 8 for supercharging pressure control.
- a catalytic converter 7 using a three-way catalyst is disposed on the downstream side of the exhaust turbine 6 in the exhaust passage 3.
- the internal combustion engine 1 has, for example, an in-cylinder direct injection type configuration.
- a fuel injection valve (not shown) for injecting fuel into the cylinder is provided for each cylinder, and includes an ignition plug 9.
- the injection timing and injection amount of the fuel injection valve and the ignition timing of the spark plug 9 are controlled by the engine control unit 10.
- An electronically controlled throttle valve 12 for controlling the amount of intake air is disposed downstream of the compressor 5 in the intake passage 2.
- the throttle valve 12 is located at the inlet of the collector 2a, and the intake passage 2 is branched for each cylinder as an intake manifold on the downstream side of the collector 2a.
- An intercooler 13 for cooling the supercharged intake air is provided between the compressor 5 and the throttle valve 12 in the intake passage 2.
- an air cleaner 14 is disposed at the most upstream portion of the intake passage 2, and an air flow meter 15 for detecting the intake air amount is disposed downstream of the air cleaner 14.
- the throttle valve 12 includes an actuator such as an electric motor, and the engine is based on a detection signal of an accelerator opening sensor 21 that detects an opening APO of an accelerator pedal (not shown) operated by a driver.
- the opening degree is controlled by a control signal from the control unit 10.
- torque limitation in the limited region is realized by limiting the opening TVO of the throttle valve 14 to the required torque indicated by the accelerator pedal opening APO.
- the engine control unit 10 includes a detection signal from the crank angle sensor 22 indicating the engine rotational speed Ne, a detection signal from the water temperature sensor 23 indicating the cooling water temperature Tw of the internal combustion engine 1, Etc. are entered.
- the detection signal of the knocking sensor 24 for detecting knocking of the internal combustion engine 1 is used as a means for detecting abnormal combustion caused by the oil of the internal combustion engine 1. This knocking sensor 24 is attached to the cylinder block of the internal combustion engine 1 so as to detect vibrations accompanying combustion in the cylinder.
- an oil change switch 25 is provided which is manually input by an operator to indicate that the oil has been changed when the lubricating oil for the internal combustion engine 1 has been changed, and abnormal conditions are given to the driver.
- Warning means 26 including a warning light, a voice warning, and the like is provided. These oil change switch 25 and warning means 26 are connected to the engine control unit 10.
- FIG. 2 is an explanatory diagram illustrating the designated inspection area A and the restriction area B using the torque Te and the rotational speed Ne of the internal combustion engine 1 as parameters.
- a line WOT in the figure indicates the fully open characteristic of the entire internal combustion engine 1 when no particular limitation is imposed.
- the abnormal combustion targeted by the present invention is the original ignition at low speed and high load due to the oil that has entered the cylinder through the intake system or the cylinder wall surface in a state where the warm-up is not sufficiently completed. It is a kind of pre-ignition where ignition combustion starts before the time.
- the designated inspection area A indicated by the boundary line a in the figure is fixedly set corresponding to the area on the low-speed and high-load side where such abnormal combustion due to oil can occur rarely. .
- the designated inspection area A is in the supercharging area where the supercharging pressure by the turbocharger 4 is positive.
- the restricted area B indicated by the boundary line b in the figure is variably set in the area on the low speed and high load side while being included in the designated inspection area A.
- the limit area B can be 0 when it is minimum, and is slightly inside the designated inspection area A (that is, slightly higher load side) when it is maximum. In other words, even if the restriction area B is the maximum, the designated inspection area A is an operation area slightly wider than this.
- the specified inspection area A may coincide with the maximum of the restriction area B.
- the designated inspection area A and the restriction area B are both illustrated as substantially triangular areas, but the present invention is not limited to such a form. It is possible to set the areas A and B in arbitrary shapes, such as a form in which the designated inspection area A and the restriction area B are partitioned with a constant torque Te or a constant rotational speed Ne.
- the limit area B When the limit area B is set as described above, even if the driver's requested torque indicated by the accelerator pedal opening APO is within the limit area B, the torque limit is applied, and the actual The torque has a value slightly lower than the boundary line b (substantially on the boundary line b). Therefore, the risk of occurrence of abnormal combustion is greatly reduced as compared with the case where the operation region is not limited. However, if the limit region B is set to be excessively large, the required torque that enters the limit region B cannot be realized. This is not preferable because the torque Te is insufficient when the vehicle is accelerated.
- the restriction area B when the abnormal combustion actually occurs in the designated inspection area A where abnormal combustion may occur, the restriction area B is expanded, and conversely, the operation in the designated inspection area A is also performed. Regardless, when the abnormal combustion does not actually occur, the restriction area B is reduced to make the restriction area B an appropriate size. For example, based on the detection signal of the knocking sensor 24, when ignition combustion occurs in the designated inspection region A before the original ignition timing, it can be determined that abnormal combustion has occurred.
- FIG. 3 shows an example of a mode of enlargement of the restriction region B.
- the boundary line is shown.
- the restricted area B expands to the range indicated by b2. That is, the restricted area B is expanded so as to include the areas on the lower load side and the higher speed side.
- the restriction area B is enlarged based on the frequency of occurrence of abnormal combustion in the designated inspection area A.
- the occurrence frequency is indicated by the cumulative operation time (Ti) in the designated inspection region A from the occurrence of the previous abnormal combustion to the occurrence of the current abnormal combustion. That is, if the cumulative operation time until one abnormal combustion occurs is long, the frequency is low, and if the cumulative operation time is short, the frequency is high.
- the restricted area B is expanded at a stretch to a predetermined size for an abnormality. For example, if the oil is excessively deteriorated (viscosity is reduced) or if a large amount of deposits are accumulated in the combustion chamber, abnormal combustion is likely to occur, so abnormalities occur frequently (ie, at short time intervals). When combustion is detected, it is determined that these are abnormal, and the restriction region B is substantially enlarged to the maximum. At the same time, the warning means 26 including a warning light and a voice warning is activated to notify the driver of the abnormality.
- the restriction region B expanded based on the detection of abnormal combustion as described above is gradually reduced until the next occurrence of abnormal combustion.
- the restriction region B is enlarged to the maximum size, if the restriction region B is reduced without eliminating the cause of the abnormality, abnormal combustion occurs again at a high frequency. Since this occurs and is not preferable, the restriction area B is not reduced.
- the reduction speed when the restriction region B is reduced is variably set based on the occurrence frequency of abnormal combustion. This is because when the occurrence frequency of abnormal combustion is low, it is preferable to increase the reduction speed of the restriction region B in order to quickly eliminate the torque restriction, and conversely, when the occurrence frequency is high, the restriction region B is reduced. This is based on the idea that it is preferable to gradually reduce the restriction region B because there is a high possibility that abnormal combustion will occur again.
- FIG. 5 and FIG. 6 explain the difference in the reduction speed described above.
- FIG. 5 shows an example when the occurrence frequency is high.
- A of a figure shows the cumulative operation time Ti in the designated inspection area A since the previous abnormal combustion detection. At time t0, the engine operating condition is again within the designated inspection area A, and the cumulative operating time Ti increases in a form that is added to the cumulative operating time Ti so far.
- the cumulative operation time Ti increases in a form that is added to the cumulative operating time Ti so far.
- the cumulative operation time Ti is relatively short
- the limited region B is expanded and the cumulative operation time Ti is reset to zero.
- C shows the change in the size of the restriction region B by the value of the lower limit torque (see the boundary line b in FIG. 2) of the restriction region B. As shown in FIG. B expands (the expansion margin at this time is relatively large), and then gradually decreases until the next abnormal combustion occurs.
- the reduction speed at this time is relatively small, and the increase in the lower limit torque is slow.
- FIG. 6 shows an example when the occurrence frequency is low.
- (A) of the figure shows the cumulative operation time Ti in the designated inspection area A since the previous abnormal combustion detection, and the engine operating condition is again within the designated inspection area A at time t0. Since the cumulative operation time Ti until that time is long, the cumulative operation time Ti when the next abnormal combustion shown in (b) is detected is longer than the example of FIG.
- the limited region B is expanded and the cumulative operation time Ti is reset to zero.
- the restriction region B expands when abnormal combustion is detected (the expansion margin at this time is relatively small), and then gradually decreases until the next occurrence of abnormal combustion.
- the reduction speed at this time is set to be relatively large. Therefore, the lower limit torque increases quickly.
- the restricted area B is repeatedly expanded and reduced according to the presence or absence of actual abnormal combustion in the designated inspection area A.
- abnormal combustion caused by oil occurs when the cylinder wall temperature is relatively low, and basically does not occur after completion of warm-up when the cylinder wall temperature is high.
- the cooling water temperature Tw detected by the water temperature sensor 23 Is set based on the temperature condition of the internal combustion engine 1, for example, the cooling water temperature Tw detected by the water temperature sensor 23. Therefore, in practice, the size of the basic restriction region B based on the cooling water temperature Tw is further enlarged / reduced according to the presence or absence of abnormal combustion.
- the restriction region B returns to the initial size (basic restriction region B corresponding to the cooling water temperature Tw) based on the signal of the oil change switch 25 manually input at the time of oil change. For example, it is possible to detect an oil change from a change in hydraulic pressure under the same operating condition or a change in oil level in the oil pan. Further, for example, if deposits are accumulated in the combustion chamber, knocking occurs in a low and medium load region that does not normally occur.
- FIG. 7 is a flowchart showing the flow of control executed in the engine control unit 10, which will be described below.
- the routine shown in FIG. 7 is repeatedly executed during the operation of the internal combustion engine 1.
- the restriction region B is initially set. Specifically, the restriction region B is set so as to increase as the temperature decreases, according to the temperature condition of the internal combustion engine 1 at that time, for example, the cooling water temperature Tw.
- the restriction region B is substantially expanded to the maximum based on the abnormality determination such as oil deterioration in the previous trip, the state is continued in the current trip.
- step 2 it is determined whether or not the operating conditions (torque Te and rotational speed Ne) of the internal combustion engine 1 are within the designated inspection area A.
- This torque Te is not the required torque but the torque after the torque is limited by the limit region B. If it is within the designated inspection area A, the process proceeds to step 3 where the execution time interval ⁇ T of this routine is added to the cumulative operation time Tiz so far to determine the cumulative operation time Ti. If it is outside the designated inspection area A, the accumulated operation time Ti up to that point is held.
- step 4 it is determined whether or not abnormal combustion has occurred.
- the abnormal combustion can be detected using the knocking sensor 24.
- step 5 determines whether or not the cumulative operation time Ti is greater than the threshold value Tc. That is, here, the frequency of abnormal combustion is determined. If the cumulative operation time Ti is larger than the threshold value Tc, it means that the frequency is low, so that the process proceeds to step 6 and the degree of expansion of the restriction region B (see FIG. 4) and the restriction region based on the cumulative operation time Ti.
- the reduction speed of B see FIGS. 5 and 6
- enlargement of the restricted area B is executed in step 7.
- the enlargement of the restricted area B at this time is for normal use in which subsequent reduction is allowed.
- the cumulative operation time Ti is reset to zero.
- the initial value of the restriction area B is set in step 1 in accordance with the engine temperature. However, the enlargement / reduction of the normal restriction area B is also reflected in the setting in step 1 in the next routine.
- the cumulative operation time Ti is less than or equal to the threshold value Tc in step 5, the frequency is abnormally high, and thus the process proceeds to step 9 and is limited to a predetermined size (substantially maximum size) for an abnormality.
- Region B is enlarged at once (see FIG. 4).
- the warning means 26 such as a warning light is activated.
- step 4 If no abnormal combustion is detected in step 4, the process proceeds to step 10 and whether or not the restricted area B is enlarged (in other words, whether or not the restricted area B remains in the initial state set in step 1). Determine) If the initial state remains, the routine is terminated. If the restricted area B is enlarged from the initial state, it is further determined in step 11 whether the restricted area B is enlarged for normal use or for abnormal use. If the enlargement of the restricted area B is for normal use in Step 7, the process proceeds to Step 12, and the restricted area B is reduced using the reduction speed determined in Step 6. Therefore, if the state in which abnormal combustion is not detected continues, the restriction region B gradually decreases and finally returns to the initial value corresponding to the engine temperature.
- step 11 If it is determined in step 11 that the area has been expanded for an abnormality, the process proceeds to step 13 to determine whether or not a release condition is satisfied. If the release condition is satisfied, the restricted area B is returned to the initial state in step 14. If the release condition is not satisfied, the expansion of the restricted area B is continued.
- the release condition is an engine condition improvement such as oil change or loss of deposit.
- the throttle valve opening TVO is limited with respect to the accelerator pedal opening APO so that the operating condition of the internal combustion engine 1 does not fall within the limited region B.
- the automatic transmission (Including CVT)
- the shift line may be changed so that the operating point does not enter the restricted region B.
- the frequency is expressed by the time interval from the occurrence of the previous abnormal combustion to the occurrence of the current abnormal combustion. It may be determined whether or not.
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
Abstract
Description
オイルに起因した異常燃焼が生じ得る低速高負荷域に対応して予め設定された制限領域を有し、実際の機関運転条件がこの制限領域内に入らないように制限する運転領域制限手段と、
上記制限領域よりも広い運転領域として低速高負荷側に設定された指定検査領域内で、上記異常燃焼が実際に生じたことを検出する異常燃焼検出手段と、
この異常燃焼検出手段によって異常燃焼が検出されたときに、上記制限領域を拡大する制限領域可変設定手段と、
を備えて構成されている。
Claims (12)
- オイルに起因した異常燃焼が生じ得る低速高負荷域に対応して予め設定された制限領域を有し、実際の機関運転条件がこの制限領域内に入らないように制限する運転領域制限手段と、
上記制限領域よりも広い運転領域として低速高負荷側に設定された指定検査領域内で、上記異常燃焼が実際に生じたことを検出する異常燃焼検出手段と、
この異常燃焼検出手段によって異常燃焼が検出されたときに、上記制限領域を拡大する制限領域可変設定手段と、
を備えてなる内燃機関の制御装置。 - 上記制限領域可変設定手段は、異常燃焼検出までの上記指定検査領域内での累積運転時間が短いほど上記制限領域をより大きく拡大する、請求項1に記載の内燃機関の制御装置。
- 上記制限領域可変設定手段は、異常燃焼が検出されない間、上記制限領域を徐々に縮小していく、請求項1または2に記載の内燃機関の制御装置。
- 上記制限領域可変設定手段は、上記指定検査領域内での運転時間に対する異常燃焼検出の頻度が高いほど、制限領域縮小時の縮小速度を低くする、請求項3に記載の内燃機関の制御装置。
- 上記制限領域可変設定手段は、異常燃焼検出までの上記指定検査領域内での累積運転時間が所定の閾値以下である場合に、異常時用の所定の大きさまで上記制限領域を拡大する、請求項2に記載の内燃機関の制御装置。
- 異常燃焼検出までの上記指定検査領域内での累積運転時間が所定の閾値以下である場合に異常を報知する警報手段、をさらに備えている、請求項5に記載の内燃機関の制御装置。
- 上記制限領域可変設定手段は、オイル交換判定もしくはエンジン状態改善判定の少なくとも一方を条件として、上記制限領域を初期状態に戻す、請求項5に記載の内燃機関の制御装置。
- 内燃機関の油圧の計測、オイルレベルの計測、もしくはオイル交換後の手動入力、に基づいて、上記オイル交換判定を行う、請求項7に記載の内燃機関の制御装置。
- 内燃機関の筒内圧の計測、もしくは低中負荷におけるノッキング計測、に基づいて、上記エンジン状態改善判定を行う、請求項7に記載の内燃機関の制御装置。
- 上記運転領域制限手段は、運転者の要求に対する機関トルクの制限、もしくは自動変速機の変速線のシフト、によって機関運転条件の制限を行う、請求項1~9のいずれかに記載の内燃機関の制御装置。
- 上記異常燃焼検出手段は、ノッキングセンサの信号、もしくは筒内圧センサの信号から、オイルに起因した異常燃焼の発生を検出する、請求項1~10のいずれかに記載の内燃機関の制御装置。
- オイルに起因した異常燃焼が生じ得る低速高負荷域に対応して予め制限領域を設定し、実際の機関運転条件がこの制限領域内に入らないように制限するとともに、
上記制限領域よりも広い運転領域として低速高負荷側に設定された指定検査領域内で、上記異常燃焼が実際に生じたことを検出し、
この異常燃焼検出手段によって異常燃焼が検出されたときに、上記制限領域を拡大する、内燃機関の制御方法。
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EP14811560.3A EP3009646B1 (en) | 2013-06-11 | 2014-02-25 | Internal combustion engine control device, and control method |
US14/891,719 US9745904B2 (en) | 2013-06-11 | 2014-02-25 | Internal combustion engine control device, and control method |
CN201480031600.2A CN105264211B (zh) | 2013-06-11 | 2014-02-25 | 内燃机的控制装置及控制方法 |
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US20180058251A1 (en) * | 2016-08-31 | 2018-03-01 | General Electric Technology Gmbh | Flexible Service Interval Counter Module For A Valve And Actuator Monitoring System |
FR3064966B1 (fr) * | 2017-04-11 | 2019-06-07 | Peugeot Citroen Automobiles Sa | Procede de commande securise d'un moteur thermique lors d'une phase de fonctionnement en roue libre d'un vehicule |
CN109826690A (zh) * | 2019-02-27 | 2019-05-31 | 一汽解放汽车有限公司 | 一种发动机智能保养方法、装置及系统 |
JP7096852B2 (ja) * | 2020-02-25 | 2022-07-06 | 本田技研工業株式会社 | エンジン制御装置 |
CN113586239B (zh) * | 2021-08-27 | 2022-09-16 | 一汽解放汽车有限公司 | 发动机故障诊断方法、装置、控制器和存储介质 |
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