US3566847A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection system for internal combustion engines
Assignee: Robert Bosch GmbH
•
Filing: 1969-03-14
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Granted: 1971-03-02
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Expires: 1989-03-14
Abstract
Abstract A fuel injection system for internal combustion engines wherein the fuel injection valves admit fuel into the intake manifold at a frequency which is a function of rotational speed of the engine and for intervals whose length is a function of manifold pressure when the throttle in the intake manifold is at a standstill. An overriding device which is actuated by the throttle causes the fuel injection valves to extend the length of intervals of fuel admission beyond such length which reflects the then prevailing manifold pressure when the throttle is moved toward open position.
Inventors
- 👤 Hermann Scholl
- 👤 Hermann Hoelle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:33
CPC Classifications
F; F02; F02D; F02D41/00; F02D41/02; F02D41/04; F02D41/10; Y; Y10; Y10S; Y10S261/00; Y10S261/74
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A combination as defined in claim 1, wherein said resilient means comprises a helical expansion spring.
Claim 2
Dependent Claim
24 words
A combination as defined in claim 1, wherein said overriding means further comprises flow restrictor means interposed between said first compartment and said manifold.
Claim 3
Dependent Claim
60 words
A combination as defined in claim 1, and including an electric circuit arranged to produce output signals whose duration determines the length of said intervals and is a function of the extent of deformation of said diaphragm in response to changes in pressure differential between said compartments, said overriding means comprising means for modifying the pressure in said first compartment.
Claim 4
Dependent Claim
16 words
A combination as defined in claim 4, wherein said fuel injection valve is a solenoid-operated valve.
References Cited (Backward Citations)
US2910057A
Cited
US3463129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |