IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0485470
(2006-07-13)
|
등록번호 |
US-7296556
(2007-11-20)
|
우선권정보 |
JP-2005-206598(2005-07-15) |
발명자
/ 주소 |
- Yamaguchi,Satoshi
- Shimasaki,Yuichi
- Hasegawa,Mamoru
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
7 인용 특허 :
6 |
초록
▼
A control system for an internal combustion engine having a fuel injector located in a combustion chamber of the engine for injecting fuel into the combustion chamber. The fuel injection timing stored in a fuel injection timing map is retrieved according to the detected engine operating condition to
A control system for an internal combustion engine having a fuel injector located in a combustion chamber of the engine for injecting fuel into the combustion chamber. The fuel injection timing stored in a fuel injection timing map is retrieved according to the detected engine operating condition to determine the fuel injection timing. An actual ignition timing of the fuel injected into the combustion chamber is detected. An ignition delay of the actual ignition timing with respect to the target ignition timing, which is set according to the engine operating condition and a fuel injection timing correction amount, is calculated according to the calculated ignition delay. The fuel injection timing is corrected with the fuel injection timing correction amount, and the fuel injection is executed according to the corrected fuel injection timing.
대표청구항
▼
What is claimed is: 1. A control system for an internal combustion engine having fuel injection means provided in a combustion chamber of the engine for injecting fuel into the combustion chamber, the control system comprising: operating condition detecting means for detecting an operating conditio
What is claimed is: 1. A control system for an internal combustion engine having fuel injection means provided in a combustion chamber of the engine for injecting fuel into the combustion chamber, the control system comprising: operating condition detecting means for detecting an operating condition of the engine; fuel injection timing storing means for storing fuel injection timings performed by the fuel injection means, the fuel injection timings being set according to the operating condition of the engine and on a property of a predetermined fuel; fuel injection control means for retrieving the fuel injection timing stored in the fuel injection timing storing means according to the detected engine operating condition to determine the fuel injection timing, and executing a fuel injection through the fuel injection means; ignition timing storing means for storing target compression ignition timings of the fuel injected into the combustion chamber, the target compression ignition timings being set according to the operating condition of the engine; ignition timing detecting means for detecting an actual compression ignition timing of the fuel injected into the combustion chamber, based on a change in a pressure in the combustion chamber; and fuel injection timing correction amount calculating means for calculating an ignition delay of the actual compression ignition timing with respect to the target compression ignition timing, and calculating a fuel injection timing correction amount according to the calculated ignition delay, the ignition delay being due to a difference between the predetermined fuel and the injection fuel, wherein the fuel injection control means corrects the fuel injection timing with the fuel injection timing correction amount, and executes the fuel injection according to the corrected fuel injection timing, and wherein the fuel injection timing correction amount calculating means includes ignition delay learning value calculating means for calculating a learning value of the ignition delay, and calculates the fuel injection timing correction amount using the learning value of the ignition delay. 2. A control system for an internal combustion engine having fuel injection means provided in a combustion chamber of the engine for injecting fuel into the combustion chamber, the control system comprising: operating condition detecting means for detecting an operating condition of the engine; fuel injection timing storing means for storing fuel injection timings performed by the fuel injection means, the fuel injection timings being set according to the operating condition of the engine and on a property of a predetermined fuel; fuel injection control means for retrieving the fuel injection timing stored in the fuel injection timing storing means according to the detected engine operating condition to determine the fuel injection timing, and executing a fuel injection through the fuel injection means; ignition timing storing means for storing target compression ignition timings of the fuel injected into the combustion chamber, the target compression ignition timings being set according to the operating condition of the engine; ignition timing detecting means for detecting an actual compression ignition timing of the fuel injected into the combustion chamber, based on a change in a pressure in the combustion chamber; and fuel injection timing correction amount calculating means for calculating an ignition delay of the actual compression ignition timing with respect to the target compression ignition timing, and calculating a fuel injection timing correction amount according to the calculated ignition delay, the ignition delay being due to a difference between the predetermined fuel and the injection fuel, wherein the fuel injection control means corrects the fuel injection timing with the fuel injection timing correction amount, and executes the fuel injection according to the corrected fuel injection timing, and wherein the fuel injection control means includes fuel injection timing learning means for calculating a learning value of the corrected fuel injection timing, which is based on an engine rotational speed and an engine demand torque, and executes the fuel injection according to the learning value of the fuel injection timing. 3. The control system according to claim 2, wherein the fuel injection control means executes the fuel injection using the learning value of the fuel injection timing when the leaning of the main injection timing has been completed after refueling. 4. A control method for an internal combustion engine having at least one fuel injection valve provided in a combustion chamber of the engine for injecting fuel into the combustion chamber, the control method comprising the steps of: a) detecting an operating condition of the engine; b) retrieving a fuel injection timing map according to the detected operating condition of the engine to determine a fuel injection timing, the fuel injection timing map being set according to the operating condition of the engine and on a property of a predetermined fuel: c) executing a fuel injection through the at least one fuel injection valve; d) detecting an actual compression ignition timing of the fuel injected to the combustion chamber, based on a change in a pressure in the combustion chamber; e) retrieving a target ignition timing map according to the detected operating condition of the engine, to calculate a target compression ignition timing of the fuel injected into the combustion chamber, the target ignition timing map being set according to the operating condition of the engine; f) calculating an ignition delay of the actual compression ignition timing with respect to the target compression ignition timing, the ignition delay being due to a difference between the predetermined fuel and the injected fuel; g) calculating a fuel injection timing correction amount according to the calculated ignition delay; and h) correcting the fuel injection timing with the fuel injection timing correction amount, wherein the fuel injection is executed according to the corrected fuel injection timing, i) calculating a learning value of the ignition delay, wherein the fuel injection timing correction amount is calculated using the learning value of the ignition delay. 5. The control method according to claim 4, further comprising the step of calculating a learning value of the corrected fuel injection timing, wherein the fuel injection is executed according to the learning value of the fuel injection timing. 6. The control method according to claim 5, wherein the fuel injection using the learning value of the fuel injection timing is executed when the learning of the main injection timing has been completed after refueling.
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