US4515131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel-injection control in an internal-combustion engine
Assignee: Toyota Motor Corp
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Filing: 1982-12-01
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Granted: 1985-05-07
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Expires: 2002-12-01
Abstract
Abstract In a method and apparatus for controlling fuel injection in an internal-combustion engine, crankshaft angle signals and cylinder discrimination signals are produced by a crankshaft angle sensor, and the signal for execution of the first injection of fuel is calculated in a control circuit on the basis of the crankshaft angle signals and the cylinder discrimination signals so that the first explosion of the air-fuel mixture takes place within one rotation of the crankshaft of the engine.
Inventors
- 👤 Yukio Suzuki
- 👤 Kunihiko Sato
- 👤 Motoyasu Muramatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:31
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/06; F02D41/062; F02D41/009; F02D2041/0092
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
102 words
Aa method for controlling fuel injection in an internal-combustion engine, comprising the steps of: producing crankshaft angle signals and cylinder discrimination signals with a crankshaft angle sensor, determining generation of a signal for execution of the first injection of fuel in response to the produced crankshaft angle signals and the produced cylinder discrimination signals, and performing the first injection of fuel in accordance with the first crankshaft angle signal after the starting of cranking of the engine in response to said determination so that the first explosion of the air-fuel mixture takes place within one rotation of the crankshaft of the engine.
Claim 2
Dependent Claim
102 words
Aa method for controlling fuel injection in an internal-combustion engine, comprising the steps of: producing crankshaft angle signals and cylinder discrimination signals with a crankshaft angle sensor, determining generation of a signal for execution of the first injection of fuel in response to the produced crankshaft angle signals and the produced cylinder discrimination signals, and performing the first injection of fuel in accordance with the first crankshaft angle signal after the starting of cranking of the engine in response to said determination so that the first explosion of the air-fuel mixture takes place within one rotation of the crankshaft of the engine.
Claim 3
Dependent Claim
36 words
A method as defined in claim 1, wherein said performing step includes a main routine to decide whether a starting signal is ON and whether a value of a FLAG of the starting signal is "1".
Claim 4
Dependent Claim
36 words
A method as defined in claim 2, wherein the operation of the main routine including deciding whether the value of the FLAG of the starting signal is "1" constitutes an interruption routine of said main routine.
Claim 5
Independent Claim
136 words
An apparatus for controlling fuel injection in an internal-combustion engine, comprising: fuel injection means for injecting fuel into said engine using a fuel injection valve; starter means for producing a signal representing starting of the engine; crankshaft angle sensor means for producing first signals representing the angle of a crankshaft of said engine and second signals representing discrimination of the cylinders of the engine; and control circuit means for receiving the signals from said starter means and said crankshaft angle sensor means, and in response thereto, generating a signal for commanding the fuel injection means to perform a first injection of fuel in accordance with the first crankshaft angle signal received after the starting of cranking of the engine, whereby the first injection of fuel and explosion thereof takes place within one rotation of said crankshaft.
Claim 6
Independent Claim
136 words
An apparatus for controlling fuel injection in an internal-combustion engine, comprising: fuel injection means for injecting fuel into said engine using a fuel injection valve; starter means for producing a signal representing starting of the engine; crankshaft angle sensor means for producing first signals representing the angle of a crankshaft of said engine and second signals representing discrimination of the cylinders of the engine; and control circuit means for receiving the signals from said starter means and said crankshaft angle sensor means, and in response thereto, generating a signal for commanding the fuel injection means to perform a first injection of fuel in accordance with the first crankshaft angle signal received after the starting of cranking of the engine, whereby the first injection of fuel and explosion thereof takes place within one rotation of said crankshaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-06 | 1988-11-05 | 1989-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-06 | 1992-11-05 | 1993-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-06 | 1996-11-05 | 1997-05-07 | $7700.00 | Window Closed / Lapsed |