An apparatus and a method of control of the engine for separating and detecting the fuel remaining in the engine and in the intake passages before the start of the engine and also detecting the fuel property, and calculating a parameter such as an optimum fuel injection quantity when the engine is s
An apparatus and a method of control of the engine for separating and detecting the fuel remaining in the engine and in the intake passages before the start of the engine and also detecting the fuel property, and calculating a parameter such as an optimum fuel injection quantity when the engine is started, and thus enabling an efficient exhaust performance and a good running performance to be compatible at start-up. The engine control apparatus has a unit for detecting or estimating a burned fuel quantity of the engine, and a unit for separating and detecting a burned fuel quantity supplied from the fuel injection valve and a burned quantity of fuel other than the fuel supplied from the injection valve.
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The invention claimed is: 1. An engine control apparatus comprising: means for detecting or estimating a burned fuel quantity of an engine; and means for separately detecting a burned fuel quantity of fuel supplied from a fuel injection valve after starting of the engine and a burned quantity of fu
The invention claimed is: 1. An engine control apparatus comprising: means for detecting or estimating a burned fuel quantity of an engine; and means for separately detecting a burned fuel quantity of fuel supplied from a fuel injection valve after starting of the engine and a burned quantity of fuel other than said burned fuel quantity supplied from said fuel injection valve after starting of the engine, based on said burned fuel quantity of the engine detected or estimated by said detecting or estimating means, wherein said burned fuel quantity detecting or estimating means includes: a first detecting means for detecting an initial burned fuel quantity or a fuel evaporation rate, and a second detecting means for detecting a second burned fuel quantity or a fuel evaporation rate, and wherein said means for separately detecting includes means for estimating a burned quantity of fuel other than a fuel supplied from said fuel injection valve on the basis of detection results from said first and second detecting means. 2. The engine control apparatus according to claim 1, wherein said means for separately detecting detects a residual fuel quantity existing in a cylinder, an air-intake passage, and an exhaust passage before the engine is started as a burned quantity of fuel other than a fuel supplied from said fuel injection valve. 3. The engine control apparatus according to claim 1, further comprising: means for calculating a parameter related to engine control on the basis of a detection result of said means for separately detecting. 4. The engine control apparatus according to claim 2, wherein a fuel injection quantity at the start of the engine is set on the basis of said residual fuel quantity. 5. The engine control apparatus according to claim 2, further comprising means for notifying said detected residual fuel quantity and/or a fuel property. 6. The engine control apparatus according to claim 2, further comprising means for deciding and notifying that an abnormality has occurred in the fuel system when an elapsed time from a stoppage to a start of the engine is less than or equal to a predetermined value and said detected residual fuel quantity is greater than or equal to a predetermined value. 7. An engine control apparatus, comprising: means for detecting or estimating a burned fuel quantity of an engine; means for separating said detected or estimated burned fuel quantity and separately detecting a burned fuel quantity of fuel supplied from a fuel injection valve and a burned quantity of fuel other than said burned fuel quantity supplied from said fuel injection valve, wherein said burned fuel quantity detecting or estimating means includes; a first detecting means for detecting an initial burned fuel quantity or a fuel evaporation rate, and a second detecting means for detecting a second burned fuel quantity or a fuel evaporation rate, and wherein said separating and detecting means includes means for estimating a burned quantity of fuel other than a fuel supplied from said fuel injection valve on the basis of detection results from said first and second detecting means. 8. The engine control apparatus according to claim 7, wherein said separating and detecting means estimates a burned quantity of fuel other than a fuel supplied from said fuel injection valve on the basis of a difference or a ratio between detection results of said first and second detecting means. 9. The engine control apparatus according to claim 7, wherein said separating and detecting means includes means for estimating a fuel property on the basis of a detection result of said first or second detecting means. 10. The engine control apparatus according to claim 9, wherein said separating and detecting means obtains a fuel property on the basis of said second fuel evaporation rate when said second fuel evaporation rate is lower than said first fuel evaporation rate, and obtains a residual fuel quantity on the basis of a difference or a ratio between said first fuel evaporation rate and said second fuel evaporation rate. 11. The engine control apparatus according to claim 7, wherein said first detecting means uses a period where there are both effects of change in burned fuel quantity caused by said residual fuel and effects of change in burned fuel quantity caused by said fuel property is used as a detection period, and wherein said second detecting means uses a period where there are effects of change in burned fuel quantity caused by said fuel property as a detection period. 12. The engine control apparatus according to claim 7, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate within a predetermined elapsed time after the engine is started, and said second detecting means detects a burned fuel quantity or a fuel evaporation rate after a predetermined elapsed time from the time the engine is started. 13. The engine control apparatus according to claim 12, wherein in said first and second detecting means, the moment the engine is started, which is a start point of measuring an elapsed time, is set at a time point when the engine speed is greater than zero. 14. The engine control apparatus according to claim 7, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate when an engine cooing water temperature is less than or equal to a predetermined temperature A, and said second detecting means detects a burned fuel quantity or a fuel evaporation rate when said cooling water temperature is less than or equal to a predetermined cooling water temperature B. 15. The engine control apparatus according to claim 7, wherein said first or second detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of the engine speed. 16. The engine control apparatus according to claim 15, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of an integrated value of the engine speed and/or a maximum value of the engine speed in a period from when the engine speed is greater than or equal to a predetermined value C until the engine speed is greater than or equal to a predetermined value D. 17. The engine control apparatus according to claim 15, wherein said second fuel evaporation rate detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of change in the engine speed. 18. The engine control apparatus according to claim 7, wherein said first or second detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of an exhaust component of the engine. 19. The engine control apparatus according to claim 18, wherein said first or second detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of a concentration of HC or CO as exhaust components of the engine. 20. The engine control apparatus according to claim 18, wherein said first or second detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of an air/fuel ratio to represent an exhaust component of the engine. 21. The engine control apparatus according to claim 18, wherein said second detecting means includes means for directly or indirectly detecting a response characteristic of from fuel injection to the engine up to said exhaust component, and detects a burned fuel quantity or a fuel evaporation rate on the basis of said response characteristic. 22. The engine control apparatus according to claim 21, wherein said response characteristic is detected in a time domain such as step response time. 23. The engine control apparatus according to claim 21, wherein said response characteristic is detected in a frequency domain such as a frequency response characteristic. 24. The engine control apparatus according to claim 7, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of time T0 from when the engine speed becomes greater than or equal to a predetermined value C until the engine speed becomes greater than or equal to a predetermined value D. 25. The engine control apparatus according to claim 7, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of time T1 from when an initial combustion of the engine occurs until the engine speed reaches a predetermined number. 26. The engine control apparatus according to claim 7, wherein said first detecting means detects a burned fuel quantity or a fuel evaporation rate on the basis of time T2 from initial combustion of the engine until the engine speed settles in a predetermined range and becomes stable. 27. The engine control apparatus according to claim 7, wherein said second detecting means detects a burned fuel quantity or a fuel evaporation rate after the engine speed reaches a predetermined number of revolutions after the occurrence of the initial combustion of the engine. 28. The engine control apparatus according to claim 7, wherein said second detecting means detects a burned fuel quantity or a fuel evaporation rate after the engine speed settles in a predetermined range and becomes stable. 29. The engine control apparatus according to claim 7, further comprising means for obtaining a fuel property on the basis of a second fuel evaporation rate when a second fuel evaporation rate detected by said second detecting means is higher than a first fuel evaporation rate detected by said first detecting means and deciding that engine abnormality has occurred and will aggravate the fuel evaporation rate on the basis of a difference or a ratio between said first fuel evaporation rate and said second fuel evaporation rate. 30. The engine control apparatus according to claim 29, wherein when an engine abnormality occurred, which will aggravate said fuel evaporation rate, said deciding means is adapted to decide that the fuel intake efficiency is aggravated due to fuel deposits formed in the intake valve and take countermeasures. 31. The engine control apparatus according to claim 7, wherein said first or second detecting means directly detects a fuel property. 32. An automobile, comprising: an engine; and an engine control apparatus, the engine control apparatus including: means for detecting or estimating a burned fuel quantity of an engine; and means for separately detecting a burned fuel quantity of fuel supplied from a fuel injection valve after starting of the engine and a burned quantity of fuel other than said burned fuel quantity supplied from said fuel injection valve after starting of the engine, based on said burned fuel quantity of the engine detected or estimated by said detecting or estimating means, wherein said burned fuel quantity detecting or estimating means includes; a first detecting means for detecting an initial burned fuel quantity or a fuel evaporation rate; and a second detecting means for detecting a second burned fuel quantity or a fuel evaporation rate, and wherein said means for separately detecting includes means for estimating a burned quantity of fuel other than a fuel supplied from said fuel injection valve on the basis of detection results from said first and second detecting mean.
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이 특허에 인용된 특허 (10)
Ohsaki Masanobu,JPX, Apparatus and method for controlling fuel injection of an internal combustion engine.
Amano,Noriyasu; Kawano,Takanobu; Koyama,Nobuhiko, Fuel nature measuring device of internal combustion engine and internal combustion engine having the same.
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