US4590913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection pump
Assignee: Robert Bosch GmbH
•
Filing: 1985-06-03
•
Granted: 1986-05-27
•
Expires: 2005-06-03
Abstract
Abstract A fuel injection pump having a hydraulic injection onset adjuster, an rpm governor with at least one member operating in accordance with load, and a full-load stop of the governor which limits the maximum injection quantity is proposed, in which between the full-load stop and the governor member adjustable in accordance with load a switch is provided, which switch upon a change from full load to partial load triggers a magnetic valve, to thereby effect a shift of the injection onset toward "late". The magnetic valve, to this end, engages the hydraulic control of the injection adjuster.
Inventors
- 👤 Werner Faupel
- 👤 Gerald Hofer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:25
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/128; F02D; F02D1/00; F02D1/16; F02D1/18; F02D1/183; F02B; F02B2275/00; F02B2275/14; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
163 words
A fuel injection pump comprising a housing, a rotatable cam drive supported in said pump housing arranged to effect the pumping movement of a least one pump piston to vary the supply onset and thus the injection onset relative to its rotating portion by means of an adjusting piston acted upon counter to a restoring force by hydraulic pressures of a feed pump arranged to generate an rpm-dependent pressure, an rpm governor provided with a member adjustable in accordance with load and a correspondingly displaceable stop means cooperating with said member and defining the full-load quantity at a given time arranged to determine the injection quantity, said adjustable member arranged to move away from said stop means upon a load change in the direction of a decreasing load, and an electric switch associated with said stop arranged to trigger a magnetic valve which varies the pressures acting upon said adjusting piston thereby causing the injection onset to be shifted in the "late" direction.
Claim 2
Dependent Claim
163 words
A fuel injection pump comprising a housing, a rotatable cam drive supported in said pump housing arranged to effect the pumping movement of a least one pump piston to vary the supply onset and thus the injection onset relative to its rotating portion by means of an adjusting piston acted upon counter to a restoring force by hydraulic pressures of a feed pump arranged to generate an rpm-dependent pressure, an rpm governor provided with a member adjustable in accordance with load and a correspondingly displaceable stop means cooperating with said member and defining the full-load quantity at a given time arranged to determine the injection quantity, said adjustable member arranged to move away from said stop means upon a load change in the direction of a decreasing load, and an electric switch associated with said stop arranged to trigger a magnetic valve which varies the pressures acting upon said adjusting piston thereby causing the injection onset to be shifted in the "late" direction.
Claim 3
Dependent Claim
22 words
A fuel injection pump as defined by claim 1, further wherein said stop means is hydraulically adjustable upon a change in load.
Claim 4
Dependent Claim
43 words
A fuel injection pump as defined by claim 1, further wherein said rpm governor has a control member variable in accordance with the hydraulic pressure upstream of said adjusting piston and further that this variable pressure determines the position of said stop means.
Claim 5
Dependent Claim
43 words
A fuel injection pump as defined by claim 2, further wherein said rpm governor has a control member variable in accordance with the hydraulic pressure upstream of said adjusting piston and further that this variable pressure determines the position of said stop means.
Claim 6
Dependent Claim
51 words
A fuel injection pump as defined by claim 3, further wherein said control member further comprises a sleeve of a centrifugal governor which is engaged on the one hand by the centrifugal force of flyweights and on the other by the load-dependent force of a spring which effects a pressure control.
Claim 7
Dependent Claim
51 words
A fuel injection pump as defined by claim 4, further wherein said control member further comprises a sleeve of a centrifugal governor which is engaged on the one hand by the centrifugal force of flyweights and on the other by the load-dependent force of a spring which effects a pressure control.
Claim 8
Dependent Claim
37 words
A fuel injection pump as defined by claim 1, further wherein said housing further includes a fuel suction chamber, said chamber further arranged to communicate with said adjusting piston, said stop means and a pump work chamber.
Claim 9
Dependent Claim
25 words
A fuel injection pump as defined by claim 1, further wherein said switch is embodied directly by said stop means and said quantity adjusting member.
Claim 10
Dependent Claim
59 words
A fuel injection pump as defined by claim 8, further wherein said quantity adjusting member further includes a starting lever, which actuates said quantity control member of said injection pump counter to the force of flyweights and wherein said force increases with rpm by a governor spring the prestressing of said governor spring being variable in accordance with load.
Claim 11
Dependent Claim
50 words
A fuel injection pump as defined by claim 1, further wherein said magnetic valve controls a throttled discharge of a work chamber disposed in proximity to a working face of said adjusting piston whereby opening of said magnetic valve creates a shift of said adjusting piston into a "late" direction.
Claim 12
Dependent Claim
61 words
A fuel injection pump as defined by claim 10, further wherein said discharge line communicates with a relief line of said work chamber which receives said working force of said adjusting piston and further that a throttle is disposed downstream of said discharge line whereby upon opening of said magnetic valve, a higher pressure is brought about in said work chamber.
References Cited (Backward Citations)
US4224916A
Cited
US4365605A
Cited
US4475519A
Cited
US4397285A
Cited
JPS5891335A
Cited
US4495916A
Cited
US4432327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |