JPWO2020183211A5 - - Google Patents

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JPWO2020183211A5
JPWO2020183211A5 JP2021504586A JP2021504586A JPWO2020183211A5 JP WO2020183211 A5 JPWO2020183211 A5 JP WO2020183211A5 JP 2021504586 A JP2021504586 A JP 2021504586A JP 2021504586 A JP2021504586 A JP 2021504586A JP WO2020183211 A5 JPWO2020183211 A5 JP WO2020183211A5
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temperature
combustion engine
internal combustion
nozzle
tip
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JP7188554B2 (en
JPWO2020183211A1 (en
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Priority claimed from PCT/IB2019/000252 external-priority patent/WO2020183211A1/en
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燃焼室内に燃料を直接噴射する燃料噴射弁を有し、上記燃料噴射弁のノズル先端の温度が所定温度のときに当該ノズル先端の燃料付着量が極大値となる内燃機関の制御方法であって、
上記燃料噴射弁の上記ノズル先端の温度を昇温させることが可能なヒータと、上記ヒータに電力を供給するバッテリと、を有し、
上記内燃機関の始動時に、上記燃料付着量が上記極大値となる温度域を避けるように、上記燃料噴射弁の上記ノズル先端の温度を制御し、
上記内燃機関の始動時に上記ノズル先端の温度が上記所定温度よりも低い場合、
上記燃料噴射弁の燃料噴射開始までに、上記ヒータを用いて上記ノズル先端の温度を上記所定温度よりも高くする内燃機関の制御方法。It is a control method of an internal combustion engine having a fuel injection valve that directly injects fuel into a combustion chamber, and when the temperature of the nozzle tip of the fuel injection valve is a predetermined temperature, the fuel adhesion amount at the nozzle tip becomes the maximum value. ,
It has a heater capable of raising the temperature of the nozzle tip of the fuel injection valve and a battery for supplying electric power to the heater.
When starting the internal combustion engine, the temperature at the tip of the nozzle of the fuel injection valve is controlled so as to avoid a temperature range in which the fuel adhesion amount becomes the maximum value.
When the temperature at the tip of the nozzle is lower than the predetermined temperature when the internal combustion engine is started,
A method for controlling an internal combustion engine in which the temperature at the tip of a nozzle is raised above a predetermined temperature by using the heater by the start of fuel injection of the fuel injection valve. （削除）(Delete) 上記内燃機関の始動時に上記ノズル先端の温度が上記所定温度を超えると、上記ノズル先端の温度を上記内燃機関が停止するまで上記所定温度よりも高い温度に維持する請求項１に記載の内燃機関の制御方法。 The internal combustion engine according to claim 1, wherein when the temperature of the tip of the nozzle exceeds the predetermined temperature when the internal combustion engine is started, the temperature of the tip of the nozzle is maintained at a temperature higher than the predetermined temperature until the internal combustion engine is stopped. Control method. 上記内燃機関を始動させる際には上記ヒータの作動を許可し、
上記内燃機関を始動させない際には上記ヒータの作動を許可しない請求項１または３に記載の内燃機関の制御方法。When starting the internal combustion engine, the operation of the heater is permitted, and the operation of the heater is permitted.
The control method for an internal combustion engine according to claim 1 or 3, wherein the operation of the heater is not permitted when the internal combustion engine is not started. 上記内燃機関の始動時に上記ヒータを作動させることによって減少が見込まれる排気微粒子数である第１排気微粒子数と、始動時に上記ヒータを作動させることで上記バッテリの電力が使われて当該内燃機関の始動のタイミングが早まることによって増加が見込まれる排気微粒子数である第２排気微粒子数と、を比較し、上記第１排気微粒子数が上記第２排気微粒子数よりも多い場合に、上記ヒータを作動させる請求項１、３、４のいずれかに記載の内燃機関の制御方法。 The number of first exhaust particles, which is the number of exhaust particles expected to decrease by operating the heater at the start of the internal combustion engine, and the power of the battery by operating the heater at the start of the internal combustion engine are used. Compare the number of second exhaust particles, which is the number of exhaust particles that is expected to increase due to the earlier start timing, and operate the heater when the number of first exhaust particles is larger than the number of second exhaust particles. The control method for an internal combustion engine according to any one of claims 1, 3 and 4. 上記内燃機関は、排気浄化用触媒の温度が所定の第１触媒温度閾値よりも低くなると始動されるものであって、
上記ヒータは、上記排気浄化用触媒の温度が上記第１触媒温度閾値よりも高い所定の第２触媒温度閾値よりも低くなると作動し、
上記排気浄化用触媒の温度低下速度が大きくなるほど上記第１触媒温度閾値と上記第２触媒温度閾値との差が大きくなるよう上記第２触媒温度閾値を設定する請求項１、３～５のいずれかに記載の内燃機関の制御方法。The internal combustion engine is started when the temperature of the exhaust gas purification catalyst becomes lower than a predetermined first catalyst temperature threshold value.
The heater operates when the temperature of the exhaust gas purification catalyst becomes lower than a predetermined second catalyst temperature threshold value higher than the first catalyst temperature threshold value.
Any of claims 1, 3 to 5, wherein the second catalyst temperature threshold value is set so that the difference between the first catalyst temperature threshold value and the second catalyst temperature threshold value increases as the temperature decrease rate of the exhaust purification catalyst increases. The control method of the internal combustion engine described in the catalyst. 上記内燃機関が搭載される車両の車速が速くなるほど、上記第２触媒温度閾値を高く設定する請求項６に記載の内燃機関の制御方法。 The control method for an internal combustion engine according to claim 6, wherein the second catalyst temperature threshold value is set higher as the vehicle speed of the vehicle on which the internal combustion engine is mounted increases. 上記燃料噴射弁の上記ノズル先端の上記燃料付着量を運転状態に応じて算出し、
上記燃料付着量を用いて上記ヒータの作動時間を算出する請求項１、３～７のいずれかに記載の内燃機関の制御方法。The amount of fuel adhering to the tip of the nozzle of the fuel injection valve is calculated according to the operating condition.
The control method for an internal combustion engine according to any one of claims 1 to 3 to 7, wherein the operating time of the heater is calculated using the fuel adhering amount. 上記燃料噴射弁の上記ノズル先端の温度が上記所定温度よりも低い場合、上記燃料噴射弁の上記ノズル先端の温度が低くなるほど、上記ヒータの作動時間を長くする請求項８に記載の内燃機関の制御方法。 The internal combustion engine according to claim 8, wherein when the temperature of the nozzle tip of the fuel injection valve is lower than the predetermined temperature, the lower the temperature of the nozzle tip of the fuel injection valve, the longer the operating time of the heater. Control method. 燃焼室内に燃料を直接噴射する燃料噴射弁を有し、上記燃料噴射弁のノズル先端の温度が所定温度のときに当該ノズル先端の燃料付着量が極大値となる内燃機関の制御方法であって、
上記内燃機関の始動時に、上記燃料付着量が上記極大値となる温度域を避けるように、上記燃料噴射弁の上記ノズル先端の温度を制御し、
上記内燃機関の始動時に上記ノズル先端の温度が上記所定温度よりも低い場合、
上記燃料噴射弁の上記ノズル先端の温度が上記所定温度よりも高くならないようにする内燃機関の制御方法。It is a control method of an internal combustion engine having a fuel injection valve that directly injects fuel into a combustion chamber, and when the temperature of the nozzle tip of the fuel injection valve is a predetermined temperature, the fuel adhesion amount at the nozzle tip becomes the maximum value. ,
When starting the internal combustion engine, the temperature at the tip of the nozzle of the fuel injection valve is controlled so as to avoid a temperature range in which the fuel adhesion amount becomes the maximum value.
When the temperature at the tip of the nozzle is lower than the predetermined temperature when the internal combustion engine is started,
A method for controlling an internal combustion engine so that the temperature at the tip of the nozzle of the fuel injection valve does not become higher than the predetermined temperature. 燃焼室に燃料を直接噴射し、ノズル先端の温度が所定温度のときに上記ノズル先端の燃料付着量が極大値となる燃料噴射弁と、
上記燃料噴射弁の上記ノズル先端の温度を昇温させることが可能なヒータと、
上記ヒータに電力を供給するバッテリと、を有し、
内燃機関の始動時に、上記燃料付着量が上記極大値となる温度域を避けるように上記ノズル先端の温度を制御するとともに、上記内燃機関の始動時に上記ノズル先端の温度が上記所定温度よりも低い場合、上記燃料噴射弁の燃料噴射開始までに、上記ヒータを用いて上記ノズル先端の温度を上記所定温度よりも高くする制御部と、を有する内燃機関の制御装置。A fuel injection valve that injects fuel directly into the combustion chamber and maximizes the amount of fuel adhered to the tip of the nozzle when the temperature at the tip of the nozzle is a predetermined temperature.
A heater that can raise the temperature of the nozzle tip of the fuel injection valve, and
It has a battery that supplies power to the heater,
When the internal combustion engine is started, the temperature of the nozzle tip is controlled so as to avoid the temperature range where the fuel adhesion amount becomes the maximum value, and the temperature of the nozzle tip is lower than the predetermined temperature when the internal combustion engine is started. In the case, a control device for an internal combustion engine having a control unit that raises the temperature of the tip of the nozzle to a temperature higher than the predetermined temperature by using the heater by the start of fuel injection of the fuel injection valve.
JP2021504586A 2019-03-13 2019-03-13 Internal combustion engine control method and internal combustion engine control device Active JP7188554B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2019/000252 WO2020183211A1 (en) 2019-03-13 2019-03-13 Method for controlling internal combustion engine and device for controlling internal combustion engine

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JPWO2020183211A1 JPWO2020183211A1 (en) 2020-09-17
JPWO2020183211A5 true JPWO2020183211A5 (en) 2022-03-03
JP7188554B2 JP7188554B2 (en) 2022-12-13

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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005002933A (en) * 2003-06-13 2005-01-06 Suzuki Motor Corp Fuel heating control device for internal combustion engine
JP2005171889A (en) * 2003-12-11 2005-06-30 Toyota Motor Corp Fuel supply device
JP4305165B2 (en) 2003-12-19 2009-07-29 トヨタ自動車株式会社 Internal combustion engine
JP2009036031A (en) * 2007-07-31 2009-02-19 Nissan Motor Co Ltd Direct injection engine and method of controlling the same
JP2010038000A (en) 2008-08-01 2010-02-18 Toyota Motor Corp Fuel supply apparatus
JP2014222052A (en) * 2013-05-14 2014-11-27 トヨタ自動車株式会社 Fuel injection device of internal combustion engine
WO2017138144A1 (en) 2016-02-12 2017-08-17 日産自動車株式会社 Control method and control device of direct-injection type internal-combustion engine

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