US4177775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection pump
Assignee: Robert Bosch GmbH
•
Filing: 1978-06-16
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Granted: 1979-12-11
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Expires: 1998-06-16
Abstract
Abstract A fuel injection pump in which the onset of fuel injection can be varied by way of a device operating in dependence on speed in a conventional manner by turning the roller ring which cooperates with a cam plate which in turn is connected with the pump and distributor piston. In accordance with the present invention the angle of twist of the roller ring is limited by a stop which engages this ring.
Inventors
- 👤 Gerald Hofer
- 👤 Karl Konrath
- 👤 Manfred Schwarz
- 👤 Willi Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:30
CPC Classifications
F; F02; F02M; F02M41/00; F02M41/08; F02M41/10; F02M41/12; F02M41/123; F02M41/128
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
91 words
A fuel injection pump for internal combustion engines provided with a cam drive mechanism arranged to actuate at least one pump piston, said cam drive mechanism comprising a ring stationarily mounted in the pump housing and being rotatable by means of a device operating in dependence on the speed, and adpated to adjust the onset of injection, comprising a stop means arranged to limit the twisting angle (α) of said ring and further being adjustable by way of another device which engages into at least one corresponding recess of said ring.
Claim 2
Dependent Claim
91 words
A fuel injection pump for internal combustion engines provided with a cam drive mechanism arranged to actuate at least one pump piston, said cam drive mechanism comprising a ring stationarily mounted in the pump housing and being rotatable by means of a device operating in dependence on the speed, and adpated to adjust the onset of injection, comprising a stop means arranged to limit the twisting angle (α) of said ring and further being adjustable by way of another device which engages into at least one corresponding recess of said ring.
Claim 3
Dependent Claim
42 words
A fuel injection pump as claimed in claim 1, wherein the rotation of said ring oriented into the direction "late" can be limited by way of said other device by means of said stop means to accommodate cold starting of an engine.
Claim 4
Dependent Claim
20 words
A fuel injection pump as claimed in claim 1, wherein said other adjusting device is operated by a Bowden cable.
Claim 5
Dependent Claim
20 words
A fuel injection pump as claimed in claim 2, wherein said other adjusting device is operated by a Bowden cable.
Claim 6
Dependent Claim
18 words
A fuel injection pump as claimed in claim 1, wherein said other adjusting device includes a thermostat element.
Claim 7
Dependent Claim
15 words
A fuel injection pump as claimed in claim 5, wherein said thermostat is electrically heated.
Claim 8
Dependent Claim
22 words
A fuel injection pump as claimed in claim 5, wherein said thermostat element is operated by coolant of the internal combustion engine.
Claim 9
Dependent Claim
24 words
A fuel injection pump as claimed in claim 1, wherein said recess and the stop means are arranged radially with respect to said ring.
Claim 10
Dependent Claim
39 words
A fuel injection pump according to claim 8, wherein said stop means includes a pin member attached axially and eccentrically to a pivot pin mounted in said pump housing and operable by a lever means against a restoring spring.
Claim 11
Dependent Claim
34 words
A fuel injection pump as claimed in claim 9, wherein said ring further includes a periphery and said recess extends therethrough, said recess further arranged to include indicia markings for adjustment of said ring.
Claim 12
Dependent Claim
20 words
A fuel injection pump as claimed in claim 1, wherein said other adjusting device further includes an elastic intermediate member.
Claim 13
Dependent Claim
27 words
A fuel injection pump according to claim 11, wherein said elastic member includes an entraining spring that is disposed between said lever means and said pivot pin.
Claim 14
Dependent Claim
52 words
A fuel injection pump as claimed in claim 12, wherein said lever means includes a bore arranged to receive said pivot pin, said pivot pin further being rotatable by means of an elastic bent rod which is associated therewith, said elastic bent rod including a remote portion which cooperates with said lever.
Claim 15
Dependent Claim
26 words
A fuel injection pump as claimed in claim 1, wherein another recess is provided in said ring for adjustment and selective engagement of said stop means.
References Cited (Backward Citations)
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Cited
US3308799A
Cited
US3906916A
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US3869226A
Cited
US4033310A
Cited
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Cited
US4098249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-10 | 1983-06-11 | 1983-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-10 | 1987-06-11 | 1987-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-10 | 1991-06-11 | 1991-12-11 | $7700.00 | Window Closed / Lapsed |