Patent US4106458A successfully refreshed from Google Patents.
US4106458A
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Fuel injector
Assignee: Kloeckner Humboldt Deutz AG
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Filing: 1977-04-14
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Granted: 1978-08-15
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Expires: 1997-04-14
Abstract
Abstract A fuel injector for internal combustion engines which comprises a fuel pump, a fuel injection pump with volume governor, and a fuel injection valve. A differential piston is arranged between the fuel injection pump and the fuel injection valve. The larger end face of the differential piston is acted upon by the fuel injection pump; the smaller end face is acted upon by the fuel pump through a check valve. The differential piston is connected with valve which limits the feed pressure of the fuel pump is provided in a connecting line between the fuel pump and the fuel injection pump. A pressure valve which determines the fuel pressure ahead of the fuel injection pump is arranged in a return line from the fuel injection pump to the fuel tank.
Inventors
- 👤 Wolfgang Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:48
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/02; F02M59/10; F02M59/105
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
183 words
A fuel injector for internal combustion engines having a fuel tank, which comprises: fuel pumping means in communication with said fuel tank; fuel injection pumping means in communication with said fuel pumping means; volume governing means associated with said fuel injection pumping means; fuel injection valve means in communication with said fuel pumping means and said fuel injection pumping means; differential piston means interposed between and in communication with said fuel injection pumping means and said fuel injection valve means, said differential piston means having a first larger end face which is in communication with said fuel pumping means, and a second smaller end face which is in communication with said fuel pumping means; first check valve means interposed between said fuel injection valve means and said fuel pumping means; second check valve means interposed between said fuel pumping means and said fuel injection pumping means for limiting the feed pressure of said fuel pumping means; and pressure valve means interposed between said fuel injection pumping means and said fuel tank for determining the fuel pressure ahead of said fuel injection pumping means.
Claim 2
Dependent Claim
183 words
A fuel injector for internal combustion engines having a fuel tank, which comprises: fuel pumping means in communication with said fuel tank; fuel injection pumping means in communication with said fuel pumping means; volume governing means associated with said fuel injection pumping means; fuel injection valve means in communication with said fuel pumping means and said fuel injection pumping means; differential piston means interposed between and in communication with said fuel injection pumping means and said fuel injection valve means, said differential piston means having a first larger end face which is in communication with said fuel pumping means, and a second smaller end face which is in communication with said fuel pumping means; first check valve means interposed between said fuel injection valve means and said fuel pumping means; second check valve means interposed between said fuel pumping means and said fuel injection pumping means for limiting the feed pressure of said fuel pumping means; and pressure valve means interposed between said fuel injection pumping means and said fuel tank for determining the fuel pressure ahead of said fuel injection pumping means.
Claim 3
Dependent Claim
24 words
A fuel injector according to claim 1, which includes a housing common to both said differential piston means and said fuel injection valve means.
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) | 1981-08-14 | 1982-02-13 | 1982-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-14 | 1986-02-13 | 1986-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-14 | 1990-02-13 | 1990-08-15 | $7700.00 | Window Closed / Lapsed |