US3587536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic fuel injection system for internal-combustion engines
Assignee: Bosch Corp
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Filing: 1969-10-22
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Granted: 1971-06-28
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Expires: 1989-10-22
Abstract
Abstract RISES, THE GROUPS OF THE CONTROL COILS AND THUS THE FUEL INJECTION VALVE ARE SWITCHED SO AS TO BE ENERGIZED SIMULTANEOUSLY. THE CONTROL COILS OF FUEL INJECTION VALVES, ONE COIL TO ONE VALVE, ARE ELECTRICALLY CONNECTED TO FORM A PLURALITY OF COIL GROUPS. DURING THE LOW-SPEED OPERATION OF THE ENGINE, SAID GROUPS OF COILS ARE SEQUENTIALLY ENERGIZED SO THAT THE VALVES ALTERNATE IN THEIR INJECTION ACTION. WHEN THE SUM OF THE COIL ENERGIZING DURATION AND A CERTAIN PREDETERMINED DURATION EXCEEDS THE DURATION PROPORTIONAL TO THE TIME REQUIRED BY ENGINE TO COMPLETE ONE REVOLUTION AS THE SPEED OF THE ENGINE
Inventors
- 👤 Takasi Inoue
- 👤 Takeshi Harada
- 👤 Takao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:24
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/008; F02D41/0087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |