US4408586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection pump
Assignee: Rolls Royce Solutions GmbH
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Filing: 1981-06-16
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Granted: 1983-10-11
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Expires: 2001-06-16
Abstract
Abstract A fuel injection pump for diesel engines wherein a delivery valve is arranged in a flow passage or flow route supplying fuel to an injection nozzle. A delivery valve is arranged in the flow route or flow passage of the fuel with a duct, under the control of a further delivery valve, branching off from the flow route or flow passage of the fuel on a downstream side of the first delivery valve. A holding chamber is provided on a discharge side of the further delivery valve, with the holding chamber containing a spring-loaded movable wall and being in communication with a relief chamber by way of a spill port or overflow duct.
Inventors
- 👤 Cornelis van Rinsum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:24
CPC Classifications
F; F02; F02M; F02M59/00; F02M59/44; F02M59/46; F02M59/462; F02B; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
225 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery valve means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, characterized in that the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert.
Claim 2
Dependent Claim
225 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery valve means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, characterized in that the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert.
Claim 3
Dependent Claim
32 words
A fuel injection pump according to claim 1, characterized in that the movable wall member is formed as a control piston having control edges for controlling an orifice of the overflow duct.
Claim 4
Dependent Claim
32 words
A fuel injection pump according to claim 2, characterized in that at least one throttle bore means is provided for communicating the respective volumes of the holding chamber means with each other.
Claim 5
Dependent Claim
36 words
A fuel injection pump according to claim 3, characterized in that the orifice of the overflow duct is arranged at a peripheral surface of the holding chamber means in an operating range of the control piston.
Claim 6
Dependent Claim
23 words
A fuel injection pump according to claim 4, characterized in that the relief chamber means is an intake chamber of the injection pump.
Claim 7
Dependent Claim
31 words
A fuel injection pump according to claim 5, characterized in that the first delivery valve means, second delivery valve means, holding chamber means, control piston, and spring means are coaxially disposed.
Claim 8
Dependent Claim
42 words
A fuel injection pump according to claim 6, characterized in that the further delivery valve means includes a valve insert, and in that means are provided for normally urging the separating means into a closed position in engagement with the valve insert.
Claim 9
Dependent Claim
30 words
A fuel injection pump according to claim 7, characterized in that means are provided in the separating means for communicating the volumes of the holding chamber means with each other.
Claim 10
Dependent Claim
32 words
A fuel injection pump according to claim 8, characterized in that means are provided on the separating means for controlling the means communicating the holding chamber means with the relief chamber means.
Claim 11
Dependent Claim
237 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery valve means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert, characterized in that the relief chamber means is an intake chamber of the injection pump.
Claim 12
Dependent Claim
237 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery valve means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert, characterized in that the relief chamber means is an intake chamber of the injection pump.
Claim 13
Dependent Claim
243 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert, characterized in that the first delivery valve means and the further delivery valve means are coaxially arranged with respect to one another.
Claim 14
Dependent Claim
243 words
A fuel injection pump for a diesel engine, the pump comprising means for supplying a flow of fuel to a fuel injection nozzle means, and a first delivery valve means arranged in the supply means for controlling a flow of fuel therethrough, a fuel holding chamber means is arranged on a downstream side of the delivery valve means, means are provided for communicating the holding chamber means with the supplying means, a further delivery valve means is provided for controlling a flow of fuel through the communicating means, means are displaceably mounted in the holding chamber means for separating the holding chamber means into two volumes, and in that means are provided for communicating the holding chamber means with a relief chamber means, the separating means is a movable wall member, the means for communicating the holding chamber means with the supplying means is a fuel duct branching off the supplying means on a downstream side of the first delivery means, and in that the means for communicating the holding chamber means with the relief chamber means is an overflow duct, the further delivery valve means includes a valve insert, spring means are provided for normally urging the wall member in a direction toward the valve insert, the wall member being mounted so as to be movable with the valve insert, characterized in that the first delivery valve means and the further delivery valve means are coaxially arranged with respect to one another.
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) | 1986-10-10 | 1987-04-11 | 1987-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-10 | 1991-04-11 | 1991-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-10 | 1995-04-11 | 1995-10-11 | $7700.00 | Window Closed / Lapsed |