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US4387688A
Expired / Lapsed
US
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Fuel injection pump for internal combustion engines
Assignee: Robert Bosch GmbH
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Filing: 1982-08-18
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Granted: 1983-06-14
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Expires: 2002-08-18
Abstract
Abstract A fuel injection pump is proposed wherein the idling rpm is influenced with the injection time adjustment via a linkage. The increased starting quantity can also be controlled along with this via an additional apparatus. The adjustment can be made in particular in accordance with engine temperature via a thermostatic servomotor.
Inventors
- 👤 Franz Eheim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:09
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/08; F02D1/12; F02D1/122; F02D1/127; F02D1/025; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/128; F02M59/00; F02M59/44; F02M59/447
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
209 words
A fuel injection pump for internal combustion engines comprising (A) a housing, a cam drive in said housing which effects the supply movement of at least one pump piston, said cam drive having a housed rest portion and a revolvable portion, said rest portion being adjustable relative to said revolvable portion to adjust the onset of injection via means responsive at least in accordance with rpm, said means having a stop, and an intervention lever means disposed exteriorly of said housing adapted to cooperate with said stop; (B) a fuel control member, an rpm governor operating to control said fuel control member which determines injection quantity, an arbitrarily actuatable adjusting lever which varies the rpm of said governor, with an outset position of said governor being determined by means of an adjustable idling stop; and (C) a coupling means between said intervention lever and said adjusting lever; characterized in that said coupling means includes a displaceable rod supported exteriorly of said housing and a spring surrounding said rod which reacts relative to said rod to force said rod in constant contact with said intervention lever, said spring cooperating with an end of said rod remote from said intervention lever to act as an idling stop for said adjusting lever.
Claim 2
Dependent Claim
209 words
A fuel injection pump for internal combustion engines comprising (A) a housing, a cam drive in said housing which effects the supply movement of at least one pump piston, said cam drive having a housed rest portion and a revolvable portion, said rest portion being adjustable relative to said revolvable portion to adjust the onset of injection via means responsive at least in accordance with rpm, said means having a stop, and an intervention lever means disposed exteriorly of said housing adapted to cooperate with said stop; (B) a fuel control member, an rpm governor operating to control said fuel control member which determines injection quantity, an arbitrarily actuatable adjusting lever which varies the rpm of said governor, with an outset position of said governor being determined by means of an adjustable idling stop; and (C) a coupling means between said intervention lever and said adjusting lever; characterized in that said coupling means includes a displaceable rod supported exteriorly of said housing and a spring surrounding said rod which reacts relative to said rod to force said rod in constant contact with said intervention lever, said spring cooperating with an end of said rod remote from said intervention lever to act as an idling stop for said adjusting lever.
Claim 3
Dependent Claim
24 words
A fuel injection pump in accordance with claim 1, characterized in that said rod is variable in its total length via an extension nut.
Claim 4
Dependent Claim
31 words
A fuel injection pump in accordance with claim 2, characterized in that said rod and said intervention lever are disposed in one plane and supported on a cover of said housing.
Claim 5
Dependent Claim
35 words
A fuel injection pump in accordance with claim 1, characterized in that said stop for the control of the onset of injection is disposed on a lever connected via a shaft with said intervention lever.
Claim 6
Dependent Claim
51 words
A fuel injection pump in accordance with claim 4, characterized in that the onset of injection is actuated hydraulically and an adjusting piston is coupled to said rest portion of said cam drive via a stem which traverses said adjusting piston, said stem further including a portion which protrudes outward therefrom.
Claim 7
Dependent Claim
57 words
A fuel injection pump in accordance with claim 1, wherein said rpm governor has an adjusting member coupled to a fuel quantity control member, said adjusting member arranged to determine the increased quantity upon starting of the engine, characterized in that said outset position of said adjusting member is determined by the position of said intervention lever.
Claim 8
Dependent Claim
28 words
A fuel injection pump in accordance with claim 6, characterized in that said stop means has an arcuate path of travel and is controlled by said intervention lever.
Claim 9
Dependent Claim
30 words
A fuel injection pump in accordance with claim 7, characterized in that said stop means in its arcuate path of travel serves to adjust an elastically suspended double-track leaf spring.
Claim 10
Dependent Claim
21 words
A fuel injection pump in accordance with claim 8, characterized in that said leaf spring is made of a bimetallic material.
Claim 11
Dependent Claim
37 words
A fuel injection pump in accordance with claim 2, characterized in that said intervention lever is adjustable in accordance with the temperature of said engine, in particular by means of an expansible-substance governor controlled by engine coolant.
Claim 12
Dependent Claim
21 words
A fuel injection pump in accordance with claim 2, characterized in that said intervention lever is arbitrarily adjustable via a choke.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |