US4418664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modular pump-nozzle unit for an internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1980-12-01
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Granted: 1983-12-06
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Expires: 2000-12-01
Abstract
Abstract A modular pump-nozzle unit for internal combustion engines, especially air-compressing, fuel-injected internal combustion engines, with precombustion chamber injection. The modular pump-nozzle unit includes a pump element having a pump piston and an injection nozzle. The pump element and the injection nozzle are in communication by way of a connecting duct. The pump element is arranged adjacent to the injection nozzle.
Inventors
- 👤 Walter Bellmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:40
CPC Classifications
F; F02; F02M; F02M57/00; F02M57/02; F02M57/022; F02M57/023; F02M61/00; F02M61/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
122 words
A pump-nozzle unit for internal combustion engines combined into one individual unit having a pump element with a pump piston, having an injection nozzle disposed next to said pump element, and having a basic unit serving as the support for the pump element and the injection nozzle, with said basic unit being firmly inserted in a recess disposed in the cylinder head, and having a spring housing located in the injection nozzle at the level of the pump piston, with said spring housing having a pressure spring interacting with a nozzle needle of the injection nozzle, characterized in that the injection nozzle as a whole can be removed separately from the pump element from the basic unit remaining at the cylinder head.
Claim 2
Dependent Claim
122 words
A pump-nozzle unit for internal combustion engines combined into one individual unit having a pump element with a pump piston, having an injection nozzle disposed next to said pump element, and having a basic unit serving as the support for the pump element and the injection nozzle, with said basic unit being firmly inserted in a recess disposed in the cylinder head, and having a spring housing located in the injection nozzle at the level of the pump piston, with said spring housing having a pressure spring interacting with a nozzle needle of the injection nozzle, characterized in that the injection nozzle as a whole can be removed separately from the pump element from the basic unit remaining at the cylinder head.
Claim 3
Dependent Claim
59 words
A modular pump-nozzle unit according to claim 1, characterized in that the injection nozzle includes a nozzle needle means, a compression spring means for biasing the nozzle needle means, a spring housing means for accommodating the compression spring means, and in that the pump piston of the pump element and the spring housing means lie at the same level.
Claim 4
Dependent Claim
31 words
A modular pump-nozzle unit according to one of claims 1 or 2, characterized in that the mounting means includes a base member for supporting the pump element and the injection nozzle.
Claim 5
Dependent Claim
23 words
A modular pump-nozzle unit according to claim 3, characterized in that the communicating means is a connecting duct arranged in the base member.
Claim 6
Dependent Claim
21 words
A modular pump-nozzle unit according to claim 4, characterized in that the connecting duct is integrally cast in the base member.
Claim 7
Dependent Claim
24 words
A modular pump-nozzle unit according to claim 4, characterized in that the base member further includes means for supplying fuel to the pump element.
Claim 8
Dependent Claim
24 words
A modular pump-nozzle unit according to claim 6, characterized in that the fuel supplying means is a feed duct provided in the base member.
Claim 9
Dependent Claim
21 words
A modular pump-nozzle unit according to claim 7, characterized in that the feed duct is integrally cast in the base member.
Claim 10
Dependent Claim
46 words
A modular pump-nozzle unit according to claim 7, characterized in that the base member is adapted to be inserted in a recess of a cylinder head of the internal combustion engine, and in that means are provided for attaching the base member to the cylinder head.
Claim 11
Dependent Claim
27 words
A modular pump-nozzle unit according to one of claims 1 or 2, characterized in that the communicating means is a connecting duct arranged in the mounting means.
Claim 12
Dependent Claim
20 words
A modular pump-nozzle unit according to claim 10, characterized that the connecting duct is integrally cast with the mounting means.
Claim 13
Dependent Claim
29 words
A modular pump-nozzle unit according to one of claims 1 or 2, characterized in that means are provided in the mounting means for supplying fuel to the pump element.
Claim 14
Dependent Claim
24 words
A modular pump-nozzle unit according to claim 12, characterized in that the supplying means is a feed duct integrally cast in the mounting means.
Claim 15
Dependent Claim
50 words
A modular pump-nozzle unit according to one of claims 1 or 2, characterized in that the mounting means are adapted to be inserted in a recess of the cylinder head of the internal combustion engine, and in that means are provided for attaching the mounting means to the cylinder head.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-12-05 | 1987-06-06 | 1987-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-05 | 1991-06-06 | 1991-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-05 | 1995-06-06 | 1995-12-06 | $7700.00 | Window Closed / Lapsed |