Patent US4392469A successfully refreshed from Google Patents.
US4392469A
Expired / Lapsed
US
⏱️ 0.0 years remaining
RPM Regulating device for the fuel injection system of an internal combustion engine
Assignee: Robert Bosch GmbH
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Filing: 1981-08-19
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Granted: 1983-07-12
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Expires: 2001-08-19
Abstract
Abstract A regulator shaft, rotary centrifugal weights, and a governor member which is slidable on the regulator shaft, are arranged in a pressurized, fuel-filled inner chamber of a fuel injection apparatus. The centrifugal weights engage regulator springs via the governor member and a control sleeve. The governor member is closed adjacent the free end of the regulator shaft except for a throttle opening for communication with the inner chamber. The governor member is provided with a work chamber, one extremity of which is limited by the regulator shaft. A conduit leading to a fuel tank communicates with the work chamber. A magnetic valve connected to an electronic control device for control of the fuel flow is provided in the conduit. Opening the magnetic valve causes a pressure drop in the work chamber which in turn causes the governor member to press against the centrifugal weights, thus enhancing the fuel injection quantity so as to reduce deviations from those desired and pre-set.
Inventors
- 👤 Wolf Wessel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:42
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/08; F02D1/12; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/125; F02M41/126; F02M41/128
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
180 words
In a fuel injection apparatus for internal combustion engines, including: a fuel supply pump; a housing defining an inner chamber into which fuel is delivered by the fuel supply pump; a fuel injection pump delivering fuel from the inner chamber to the engine; an rpm regulator having an adjustable governor member; adjustable lever means associated with said governor member for initial setting thereof; a work chamber disposed in said governor member communicating via a throttle with said inner chamber; bore means provided within said governor member in communication with said work chamber; and an hydraulic setting mechanism which varies the moment of fuel delivery by the fuel injection pump as a function of pressure in the inner chamber, the improvement comprising: a control line connects said bore means with a fuel supply tank; said control line is further provided with a magnetic valve to control fuel flow; said magnetic valve is further connected to an electronic control device; and said electronic control device includes at least one sensor for measuring at least one operational characteristic of the internal combustion engine.
Claim 2
Dependent Claim
180 words
In a fuel injection apparatus for internal combustion engines, including: a fuel supply pump; a housing defining an inner chamber into which fuel is delivered by the fuel supply pump; a fuel injection pump delivering fuel from the inner chamber to the engine; an rpm regulator having an adjustable governor member; adjustable lever means associated with said governor member for initial setting thereof; a work chamber disposed in said governor member communicating via a throttle with said inner chamber; bore means provided within said governor member in communication with said work chamber; and an hydraulic setting mechanism which varies the moment of fuel delivery by the fuel injection pump as a function of pressure in the inner chamber, the improvement comprising: a control line connects said bore means with a fuel supply tank; said control line is further provided with a magnetic valve to control fuel flow; said magnetic valve is further connected to an electronic control device; and said electronic control device includes at least one sensor for measuring at least one operational characteristic of the internal combustion engine.
Claim 3
Dependent Claim
26 words
A rpm regulating device according to claim 1, characterized in that said sensor comprises a rpm transmitter for measuring the rpm of the internal combustion engine.
Claim 4
Dependent Claim
28 words
A rpm regulating device according to claim 1, characterized in that said sensor comprises a torque pickup for measuring the load factor exerted upon the internal combustion engine.
Claim 5
Dependent Claim
26 words
A rpm regulating device according to claim 1, characterized in that said sensor comprises a temperature sensor for measuring the temperature of the internal combustion engine.
Claim 6
Dependent Claim
24 words
A rpm regulating device according to claim 1, characterized in that said control line further includes a throttle means upstream of said magnetic valve.
Claim 7
Dependent Claim
29 words
A rpm regulating device according to claim 1, characterized in that said magnetic valve includes an adjustable cross-section and said adjustable cross-section is controlled by said electronic control device.
Claim 8
Dependent Claim
27 words
A rpm regulating device according to claim 1, characterized in that said electronic control device emits impulses of variable sequence and duration to open the magnetic valve.
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 |