US4392467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating fuel injector in a computer controlled fuel injection type internal combustion engine
Assignee: Toyota Motor Corp
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Filing: 1981-07-22
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Granted: 1983-07-12
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Expires: 2001-07-22
Abstract
Abstract An internal combustion engine provided with a system for controlling the predetermined idling rotational speed N F of the engine, and a system for operating a fuel injector so that the injector is de-energized when the rotational speed is higher than N cut and the injector is energized when the rotational speed is lower than N RTN . A value of N cut is the product of N F and a predetermined positive value α 1 and the value of N RTN is the product of N F and a predetermined positive value α 2 (<α 1 ).
Inventors
- 👤 Hideo Miyagi
- 👤 Toshio Suematsu
- 👤 Jiro Nakano
- 👤 Hironobu Ono
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:34
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/12; F02D41/123
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
193 words
Method for controlling the operation of a fuel injector in a computer controlled fuel injection internal combustion engine, which engine is provided with a system for maintaining a predetermined idling rotational speed N F in accordance with the temperature of the engine and with a system for controlling the operation of the fuel injector during the deceleration condition of the engine so that the injector is de-energized when the rotational speed is higher than N cut and injector is energized when the rotational speed is lower than N RTN , said method comprising the steps of: storing in the computer values of N F in accordance with the temperature of the engine; detecting the temperature of the engine; reading out the value of N F corresponding to the detected temperature; calculating, as the value of N cut , the product of a constant positive value α 1 larger than 1.0 and the read out value of N F , and; calculating, as the value of N RTN , a product of constant positive value α 2 larger than 1.0 but less than α 1 and the read out value of N F .
Claim 2
Dependent Claim
193 words
Method for controlling the operation of a fuel injector in a computer controlled fuel injection internal combustion engine, which engine is provided with a system for maintaining a predetermined idling rotational speed N F in accordance with the temperature of the engine and with a system for controlling the operation of the fuel injector during the deceleration condition of the engine so that the injector is de-energized when the rotational speed is higher than N cut and injector is energized when the rotational speed is lower than N RTN , said method comprising the steps of: storing in the computer values of N F in accordance with the temperature of the engine; detecting the temperature of the engine; reading out the value of N F corresponding to the detected temperature; calculating, as the value of N cut , the product of a constant positive value α 1 larger than 1.0 and the read out value of N F , and; calculating, as the value of N RTN , a product of constant positive value α 2 larger than 1.0 but less than α 1 and the read out value of N F .
Claim 3
Dependent Claim
21 words
Method according to claim 1, wherein said value of α 1 is 2.0, and said value of α 2 is 1.6.
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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |