WO2022158119A1 - 車両用内燃機関の制御方法および制御装置 - Google Patents
車両用内燃機関の制御方法および制御装置 Download PDFInfo
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- WO2022158119A1 WO2022158119A1 PCT/JP2021/043519 JP2021043519W WO2022158119A1 WO 2022158119 A1 WO2022158119 A1 WO 2022158119A1 JP 2021043519 W JP2021043519 W JP 2021043519W WO 2022158119 A1 WO2022158119 A1 WO 2022158119A1
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- torque
- internal combustion
- combustion engine
- vehicle
- limitation
- Prior art date
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims description 21
- 230000005540 biological transmission Effects 0.000 claims abstract description 29
- 230000001133 acceleration Effects 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 230000009194 climbing Effects 0.000 claims abstract description 10
- 238000007664 blowing Methods 0.000 abstract 1
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000881 depressing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- F02D41/022—Introducing corrections for particular conditions exterior to the engine in relation with elements of the transmission in relation with the clutch status
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers
-
- 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
-
- 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
- F02D41/10—Introducing corrections for particular operating conditions for acceleration
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/1002—Output torque
-
- 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
- F02D2200/10—Parameters related to the engine output, e.g. engine torque or engine speed
- F02D2200/101—Engine speed
-
- 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
- F02D2200/50—Input parameters for engine control said parameters being related to the vehicle or its components
- F02D2200/501—Vehicle speed
-
- 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
- F02D2200/60—Input parameters for engine control said parameters being related to the driver demands or status
- F02D2200/602—Pedal position
-
- 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
Definitions
- This invention relates to control of a vehicle internal combustion engine connected to an automatic transmission via a torque converter having a lockup mechanism.
- Patent Document 1 in a configuration in which an internal combustion engine is connected to an automatic transmission via a torque converter with a lockup mechanism, when accelerating in a non-lockup region such as immediately after starting the vehicle, the acceleration input by the driver is disclosed.
- a technique is disclosed in which the torque output by the internal combustion engine is limited to be lower than the torque corresponding to the pedal opening, thereby suppressing excessive racing (increase in rotation speed) of the internal combustion engine.
- the above torque limitation is prohibited when a predetermined condition is satisfied.
- FIG. 2 is a configuration explanatory diagram showing the configuration of the vehicle powertrain according to the present invention
- 4 is a flow chart showing the flow of processing for prohibiting torque limitation during acceleration in a non-lockup state.
- a time chart of an example in which climbing is determined as one of the prohibited conditions.
- FIG. 1 is an explanatory diagram showing the configuration of a vehicle powertrain to which the present invention is applied.
- This powertrain includes an internal combustion engine 1 that serves as a travel drive source, a belt-type continuously variable transmission (variator) 2 as an automatic transmission, and a torque converter 3 positioned between the internal combustion engine 1 and the continuously variable transmission 2. and have.
- the internal combustion engine 1 may be either a gasoline engine or a diesel engine, but in one embodiment is a gasoline engine, i.e., a spark ignition internal combustion engine.
- the automatic transmission may be a stepped transmission.
- the torque converter 3 has a lockup clutch 3a that can directly connect the pump impeller as an input element and the turbine as an output element. Engaged and released by hydraulic control.
- the continuously variable transmission 2 includes a primary pulley 2a on the drive side, a secondary pulley 2b on the driven side, and a metal belt 2c wound between them. It is adjustable by hydraulic pressure, and the pulley width of the secondary pulley 2b is changed according to this, thereby performing stepless speed change.
- a transmission input shaft serving as a rotating shaft of the primary pulley 2a is connected to an output shaft of a torque converter 3 via a forward/reverse switching mechanism 4 using a planetary gear mechanism.
- a transmission output shaft serving as a rotation shaft of the secondary pulley 2b transmits power to drive wheels 6 via a final gear 5 and a differential gear (not shown).
- the gear ratio of the continuously variable transmission 2 is controlled by the transmission controller 12 mainly based on the accelerator pedal opening and the vehicle speed.
- the continuously variable transmission 2, the forward/reverse switching mechanism 4, and the torque converter 3 are housed in a single housing 7 and mounted on the vehicle body together with the internal combustion engine 1.
- the fuel injection, ignition, etc. of the internal combustion engine 1 are controlled by the engine controller 11 .
- the engine controller 11 and the transmission controller 12 are connected via an in-vehicle network 13 such as CAN communication, and exchange necessary signals with each other.
- an accelerator opening sensor that detects the opening of the accelerator pedal operated by the driver
- a vehicle speed sensor that detects the vehicle speed
- an engine rotation speed sensor that detects the rotation speed of the internal combustion engine 1
- a turbine rotation speed of the torque converter 3 that is, A turbine rotation speed sensor for detecting the rotation speed of the input shaft of the continuously variable transmission 2, a water temperature sensor for detecting the cooling water temperature of the internal combustion engine 1, and the like are provided.
- the engagement/disengagement of the lockup clutch 3a of the torque converter 3 is controlled based on various operating conditions such as vehicle speed and accelerator pedal opening. Locked up state.
- the internal combustion engine 1 is controlled to suppress excessive racing (increase in rotational speed) of the internal combustion engine 1 due to slippage of the torque converter 3.
- 1 torque is limited. That is, the actual torque of the internal combustion engine 1 is limited relatively low compared to the target torque corresponding to the accelerator pedal opening.
- This torque limitation of the internal combustion engine 1 is performed based on a torque limitation value given to the engine controller 11 by the transmission controller 12 . That is, the transmission controller 12 suppresses racing based on, for example, the speed difference between the input rotation speed of the torque converter 3 (that is, the rotation speed of the internal combustion engine 1) and the output rotation speed (that is, the transmission input rotation speed). A torque limit value required for this is obtained and output to the engine controller 11 .
- the engine controller 11 limits the torque so that the output torque follows this torque limit value.
- the torque can be limited by appropriate means such as reducing the throttle opening (including reducing the fuel injection amount) or retarding the ignition timing.
- torque limitation during acceleration in such a non-lockup state is prohibited when a predetermined condition is satisfied.
- FIG. 2 is a flowchart showing the flow of prohibition processing for prohibiting torque limitation.
- the engine controller 11 sets and resets a flag indicating whether or not to prohibit (including release) the torque limitation according to this flow chart.
- step 1 it is determined whether or not there is a request for heating in the vehicle air conditioner (not shown). Whether or not there is a heating request is determined based on a signal supplied from the air conditioner to the engine controller 11 . If there is a request for heating, restricting the torque is prohibited in order to ensure the cooling water temperature. That is, if there is a heating request, the process proceeds from step 1 to step 9 to prohibit or cancel the torque limitation. If there is no heating request, go to step 2.
- step 2 it is determined whether the vehicle is climbing a slope or towing. If the vehicle is climbing a slope or being towed, the process proceeds to step 9 to prohibit or cancel the torque limitation.
- Whether the vehicle is climbing a hill is determined, for example, by detecting the inclination of the vehicle with a gravity sensor, or by detecting that the vehicle is running on a hill with a GPS system using high-precision map data. be able to.
- the towing state in which another vehicle is towed is, for example, a switch provided in the towing device of the vehicle so that it is turned on when towing, or a switch provided in the driver's seat to be operated by the driver. , and so on.
- step 3 When the vehicle is climbing a slope or towing, securing the driving force of the vehicle is a priority, so torque restrictions are prohibited. If the vehicle is not climbing or towing, proceed to step 3.
- step 3 it is determined whether or not the vehicle is in a high vehicle speed state equal to or higher than a predetermined vehicle speed. If the vehicle speed is high, the process proceeds to step 9 to prohibit or cancel torque limitation. That is, in a high vehicle speed state, for example, when overtaking, the torque may be insufficient, so torque limitation is prohibited. If the vehicle speed is not high, proceed to step 4.
- step 4 it is determined whether the accelerator pedal opening is greater than or equal to a predetermined opening. If the opening is equal to or greater than the predetermined opening, the process proceeds to step 9 to prohibit or cancel the torque limitation.
- the "predetermined degree of opening” in this case is an degree of opening greater than the accelerator pedal opening corresponding to acceleration that may cause torque limitation in the non-lockup state. That is, when the driver depresses the accelerator pedal strongly, it means that the driver requires sufficient acceleration performance. conduct. If the opening is not equal to or larger than the predetermined opening, the process proceeds to step 5.
- step 5 it is determined whether or not the torque limit value during torque limit exceeds the target torque corresponding to the accelerator pedal opening. If the torque limit value is higher than the target torque, the process proceeds to step 9 to prohibit or cancel the torque limit. For example, when the rotation speed difference of the torque converter 3 in the non-lockup state becomes smaller during the start acceleration of the vehicle, the torque limit value is gradually set higher and becomes higher than the target torque. At this time, torque limitation ends. If the determination in step 5 is no, go to step 6;
- step 6 it is determined whether the range position of the continuously variable transmission 2 is other than the D range (drive range). In the case of a range other than the D range, such as a low speed range or a reverse range, the process proceeds to step 9 to prohibit or cancel the torque limitation. For example, in the low speed range, priority is given to the acceleration performance of the vehicle. If it is in the D range, go to step 7.
- step 7 it is determined whether the speed change mode of the continuously variable transmission 2 is other than the normal mode.
- a shift mode other than the normal mode such as a sport mode, the process proceeds to step 9 to prohibit or cancel the torque limitation in order to give priority to the acceleration performance of the vehicle. If normal mode, go to step 8;
- step 8 a prohibition flag indicating that torque limitation should be prohibited is maintained in a reset state.
- this prohibition flag is set to prohibit or cancel the torque limitation.
- a plurality of prohibition conditions shown in steps 1 to 7 are in a so-called OR condition relationship, and if any one of them is satisfied, a prohibition flag is turned on.
- the column of torque shows characteristics of three values of target torque T1, actual torque T2, and torque limit value Tlim.
- the target torque T1 is a torque value corresponding to the accelerator pedal opening, in other words, the torque requested by the driver by depressing the accelerator pedal.
- the actual torque T2 is torque actually output by the internal combustion engine 1 after the torque is limited. Strictly speaking, the actual torque T2 is not a directly measured value of torque, but an estimated value.
- the torque limit value Tlim is a torque value commanded by the transmission controller 12 to the engine controller 11 based on the rotational speed difference of the torque converter 3 in the non-lockup state. This torque limit value Tlim is a sufficiently high value as shown in the figure in an initial state where torque limit is unnecessary.
- the prohibition flag is set to ON. Therefore, torque limitation is canceled.
- the actual torque T2 becomes in line with the target torque T1. That is, priority is given to securing the driving force so as to obtain the acceleration performance intended by the driver.
- FIG. 4 to 9 like FIG. 3, show examples of time charts corresponding to each of the prohibition conditions of steps 1, 2, 3, 6, and 7 described above. Note that changes in the actual torque T2 are omitted in these time charts.
- the actual torque T2 varies along the torque limit value Tlim during torque limitation, and follows the target torque T1 after the torque limitation is released.
- the time chart in FIG. 4 corresponds to the presence or absence of a heating request, and when a heating request occurs at time t2 as shown in column (d), the prohibition flag is turned on and the torque limitation is released. As a result, the internal combustion engine 1 is operated at a relatively high torque, and heat for heating is applied to the cooling water.
- the time chart of FIG. 5 shows prohibition of torque limitation during climbing.
- the prohibition flag is turned on and the torque limitation is released. be done. Thereby, a high driving force can be obtained.
- the time chart in FIG. 6 shows prohibition of torque limitation during towing.
- the prohibition flag is turned on and the torque limitation is released. be done. Thereby, a high driving force can be obtained.
- the time chart of FIG. 7 shows prohibition of torque limitation at high vehicle speeds.
- the prohibition flag is turned on. Torque limit is released. As a result, a high driving force can be obtained at high vehicle speeds.
- the time chart of FIG. 8 shows prohibition of torque limitation related to the range position of the continuously variable transmission 2.
- the range position is other than the D range (for example, low speed range). range)
- the prohibition flag is turned on, and the torque limitation is canceled.
- a high driving force that meets the driver's intention can be obtained in the low speed range or the like.
- the time chart of FIG. 9 shows prohibition of torque limitation related to the speed change mode of the continuously variable transmission 2.
- the speed change mode is other than normal mode (for example, sport mode).
- the prohibition flag is turned on, and the torque limitation is canceled.
- a high driving force that meets the driver's intention can be obtained in the sport mode or the like.
- the time chart in FIG. 10 shows the release of torque limitation corresponding to step 5 in the time chart in FIG. That is, at time t1, after the accelerator pedal opening increases and acceleration starts, the torque of the internal combustion engine 1 is limited by giving the torque limit value Tlim as described above, but the rotational speed difference of the torque converter 3 increases.
- the torque limit value Tlim gradually increases as it shrinks. In the illustrated example, at time t2, the torque limit value Tlim exceeds the target torque T1 corresponding to the accelerator pedal opening, and accordingly the prohibition flag is turned on and the torque limit is released.
Abstract
Description
Claims (10)
- ロックアップ機構を有するトルクコンバータを介して自動変速機に接続された車両用内燃機関の制御方法であって、非ロックアップ状態での加速時に内燃機関のトルクの制限を行う車両用内燃機関の制御方法において、
所定条件成立時には上記のトルクの制限を禁止する、車両用内燃機関の制御方法。 - 上記所定条件として、アクセル開度が所定開度以上であるときには上記のトルクの制限を禁止する、請求項1に記載の車両用内燃機関の制御方法。
- 上記所定条件として、車両の登坂時には上記のトルクの制限を禁止する、請求項1または2に記載の車両用内燃機関の制御方法。
- 上記所定条件として、車両が他の車両の牽引を行っているときには上記のトルクの制限を禁止する、請求項1~3のいずれかに記載の車両用内燃機関の制御方法。
- 上記所定条件として、所定車速以上の高車速時には上記のトルクの制限を禁止する、請求項1~4のいずれかに記載の車両用内燃機関の制御方法。
- 上記所定条件として、車両の暖房要求があるときには上記のトルクの制限を禁止する、請求項1~5のいずれかに記載の車両用内燃機関の制御方法。
- 上記所定条件として、上記自動変速機のレンジ位置がDレンジ以外であるときには上記のトルクの制限を禁止する、請求項1~6のいずれかに記載の車両用内燃機関の制御方法。
- 上記所定条件として、上記自動変速機の変速モードがノーマルモード以外であるときには上記のトルクの制限を禁止する、請求項1~7のいずれかに記載の車両用内燃機関の制御方法。
- 上記のトルクの制限の開始後、制限中の目標とするトルク制限値がアクセル開度に対応した目標トルクを上回ったときはトルクの制限を解除する、請求項1~8のいずれかに記載の車両用内燃機関の制御方法。
- ロックアップ機構を有するトルクコンバータを介して自動変速機に接続された車両用内燃機関の制御装置において、
この制御装置は、非ロックアップ状態での加速時に内燃機関のトルクの制限を行う一方、
所定条件成立時には上記のトルクの制限を禁止する、車両用内燃機関の制御装置。
Priority Applications (3)
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JP2022577007A JP7406658B2 (ja) | 2021-01-22 | 2021-11-29 | 車両用内燃機関の制御方法および制御装置 |
US18/262,202 US20240084753A1 (en) | 2021-01-22 | 2021-11-29 | Control method and control device for internal combustion engine for vehicle |
CN202180090824.0A CN116710645A (zh) | 2021-01-22 | 2021-11-29 | 车辆用内燃机的控制方法以及控制装置 |
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JP (1) | JP7406658B2 (ja) |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2006125213A (ja) * | 2004-10-26 | 2006-05-18 | Nissan Motor Co Ltd | パワートレーンのエンジン制御装置 |
JP2007327477A (ja) * | 2006-06-09 | 2007-12-20 | Jatco Ltd | 自動変速機の制御装置 |
JP2018013119A (ja) * | 2016-07-22 | 2018-01-25 | トヨタ自動車株式会社 | 車両の制御装置 |
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JP4417237B2 (ja) | 2004-12-17 | 2010-02-17 | ジヤトコ株式会社 | 自動変速機の制御装置 |
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2021
- 2021-11-29 WO PCT/JP2021/043519 patent/WO2022158119A1/ja active Application Filing
- 2021-11-29 JP JP2022577007A patent/JP7406658B2/ja active Active
- 2021-11-29 CN CN202180090824.0A patent/CN116710645A/zh active Pending
- 2021-11-29 US US18/262,202 patent/US20240084753A1/en active Pending
Patent Citations (3)
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JP2006125213A (ja) * | 2004-10-26 | 2006-05-18 | Nissan Motor Co Ltd | パワートレーンのエンジン制御装置 |
JP2007327477A (ja) * | 2006-06-09 | 2007-12-20 | Jatco Ltd | 自動変速機の制御装置 |
JP2018013119A (ja) * | 2016-07-22 | 2018-01-25 | トヨタ自動車株式会社 | 車両の制御装置 |
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JP7406658B2 (ja) | 2023-12-27 |
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