US4095573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for controlling the injection quantity of an injection internal combustion engine
Assignee: Daimler Benz AG
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Filing: 1976-09-13
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Granted: 1978-06-20
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Expires: 1996-09-13
Abstract
Abstract A control arrangement for the injection quantity of an internal combustion engine in which an adjusting member for the adjustment of the feed quantity of a fuel injection pump is adapted to be adjusted by a longitudinally displaceable diaphragm bolt of a pneumatic measuring mechanism by way of a control lever, whereby the diaphragm of the pneumatic measuring mechanism is acted upon on the one side by atmospheric pressure and is exposed on the other side thereof to the pressure in a vacuum chamber connected by way of a vacuum line with a part of the suction pipe of the internal combustion engine where the vacuum in the suction pipe is being picked-up particularly in a Venturi pipe section thereof; the control lever is thereby pivotally supported with its end opposite the adjusting member of the injection pump on a part operatively connected with the engine output control member and is adapted to be adjusted about this point of pivotal support by the diaphragm-bolt engaging in the central area of the control lever; additionally, the control lever is adjustable within the pivot plane thereof by the part actuatable by the output control member of the internal combustion engine; additionally, the flow cross section of the Venturi pipe section and therewith also of the suction pipe of the internal combustion engine is not adapted to be throttled so that the cross section remains essentially constant.
Inventors
- 👤 Karl Kollmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:09
CPC Classifications
F; F02; F02D; F02D1/00; F02D1/02; F02D1/06; F02D1/065; F02D1/08; F02D1/12; F02D1/14
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
317 words
An arrangement for the control of the injection quantity of an injection internal combustion engine, comprising a suction pipe, a fuel injection pump being connected to the suction pipe and having an adjusting means for adjusting the feed-quantity of the fuel, a pneumatic measuring means including a diaphragm means and a longitudinally displaceable diaphragm-bolt operatively connected with said diaphragm means, means including a control lever means for adjusting the adjusting means of the fuel pump by said diaphragm-bolt, said diaphragm means being acted upon on one side substantially by the outside air pressure and partially delimiting on the other side a vacuum chamber formed in said measuring means, idling spring means in said vacuum chamber urging the diaphragm means and therewith the diaphragm - bolt outwardly in the direction toward an increase of the feed quantity, and vacuum chamber being in communication by way of a vacuum line means with a part of the suction pipe, an outward member for the internal combustion engine, the pivot point of the control lever means being additionally adjustable within the pivot plane of the control lever means at least indirectly by said output control member, characterized in that the suction pipe includes a non-throttlable Venturi section, the control lever means is supported at a pivot point with its end opposite said adjusting means on an actuating member operatively connected with said output control member, said diaphragm-bolt engaging said control lever means in its central area to retract said diaphragm-bolt inwardly with an increasing vacuum in said vacuum chamber and therewith displace said adjusting means to smaller injection quantities by pivoting the control lever means about its pivot point on said actuating member, and said control lever means being adjustable at said pivot point with an increasing output adjustment of said output control member substantially in the same direction as the diaphragm-bolt movement with an increasing vacuum in said vacuum chamber.
Claim 2
Dependent Claim
317 words
An arrangement for the control of the injection quantity of an injection internal combustion engine, comprising a suction pipe, a fuel injection pump being connected to the suction pipe and having an adjusting means for adjusting the feed-quantity of the fuel, a pneumatic measuring means including a diaphragm means and a longitudinally displaceable diaphragm-bolt operatively connected with said diaphragm means, means including a control lever means for adjusting the adjusting means of the fuel pump by said diaphragm-bolt, said diaphragm means being acted upon on one side substantially by the outside air pressure and partially delimiting on the other side a vacuum chamber formed in said measuring means, idling spring means in said vacuum chamber urging the diaphragm means and therewith the diaphragm - bolt outwardly in the direction toward an increase of the feed quantity, and vacuum chamber being in communication by way of a vacuum line means with a part of the suction pipe, an outward member for the internal combustion engine, the pivot point of the control lever means being additionally adjustable within the pivot plane of the control lever means at least indirectly by said output control member, characterized in that the suction pipe includes a non-throttlable Venturi section, the control lever means is supported at a pivot point with its end opposite said adjusting means on an actuating member operatively connected with said output control member, said diaphragm-bolt engaging said control lever means in its central area to retract said diaphragm-bolt inwardly with an increasing vacuum in said vacuum chamber and therewith displace said adjusting means to smaller injection quantities by pivoting the control lever means about its pivot point on said actuating member, and said control lever means being adjustable at said pivot point with an increasing output adjustment of said output control member substantially in the same direction as the diaphragm-bolt movement with an increasing vacuum in said vacuum chamber.
Claim 3
Dependent Claim
48 words
An arrangement according to claim 1, characterized in that the vacuum chamber is operatively connected by way of the vacuum line means with the Venturi pipe section in the suction pipe of the internal combustion engine, substantially all of the combustion air flowing through said Venturi pipe section.
Claim 4
Dependent Claim
25 words
An arrangement according to claim 1, characterized in that the suction pipe is non-throttlable because the Venturi pipe section is devoid of a throttle valve.
Claim 5
Dependent Claim
32 words
An arrangement according to claim 1, characterized in that said adjusting means is a control rack, said output control member is a drive pedal and said actuating member is a bell crank.
Claim 6
Dependent Claim
52 words
An arrangement according to claim 1, characterized in that the pivot point of said control lever means on said actuating member is adjustable substantially parallelly to the adjustment direction of said diaphragm bolt and approximately to the same extent as the engaging place of the diaphragm bolt on said control lever means.
Claim 7
Dependent Claim
90 words
An arrangement according to claim 5, characterized in that the control travel of said diaphragm bolt is subdivided from the outermost position thereof in relation to the vacuum chamber, with increasing vacuum in said vacuum chamber, into an idling travel against the sole action of an idling spring, an adjoining adaptation travel with additional counter-force of an adaptation spring and an end-control travel following said adaptation travel and leading to the end position of said diaphragm bolt with an end-control spring further opposing the end-control travel of said diaphragm bolt.
Claim 8
Dependent Claim
127 words
An arrangement according to claim 6, characterized in that the engaging place of the diaphragm bolt at the control lever means is located, in the initial position of the diaphragm bolt, approximately on the connecting line between the full-load position of said pivot point and of the start-position of the point of pivotal connection of the control lever means on said adjusting means and at the same time approximately on the connecting line between the idling position of said pivot point and the maximum idling position of said point of pivotal connection, and in the opposite end position of the diaphragm bolt, at least approximately on the connecting line between the full-load position of said pivot point and the stop position of said point of pivotal connection.
Claim 9
Dependent Claim
33 words
An arrangement according to claim 7, characterized in that the full-load position of the actuating member is adjustable by means of an abutment member adjustably received in the housing of the injection pump.
Claim 10
Dependent Claim
75 words
An arrangement according to claim 8, characterized in that said vacuum line means includes in the line section thereof on the engine side a vacuum-booster means connected to a vacuum pump and in the line section thereof on the control side, a three-way control valve means operable to selectively connect the line section on the control side, with the line section leading to the vacuum-booster means, directly with the vacuum pump or with the atmosphere.
Claim 11
Dependent Claim
37 words
An arrangement according to claim 9, characterized in that the vacuum-booster means includes a diaphragm and a drawspring engaging at said diaphragm and determining the initial pressure effective therein, said drawspring being adjustable in its tension force.
Claim 12
Dependent Claim
86 words
An arrangement according to claim 10, characterized in that the three-way valve means is at the same time a component of an ignition lock means whose key is selectively rotatable from a shut-off position, in which the measuring means is connected with the vacuum pump, into a starting position in which the measuring means is connected with the atmosphere, and into a drive position in which the measuring means is connected with the Venturi section of the suction pipe by way of said vacuum booster means.
Claim 13
Dependent Claim
21 words
An arrangement according to claim 11, characterized in that the internal combustion engine is a Diesel-passenger motor vehicle internal combustion engine.
Claim 14
Dependent Claim
32 words
An arrangement according in claim 12, characterized in that said adjusting means is a control rack, said output control member is a drive pedal and said actuating member is a bell crank.
Claim 15
Dependent Claim
90 words
An arrangement according to claim 1, characterized in that the control travel of said diaphragm bolt is subdivided from the outermost position thereof in relation to the vacuum chamber, with increasing vacuum in said vacuum chamber, into an idling travel against the sole action of an idling spring, an adjoining adaptation travel with additional counter-force of an adaptation spring and an end-control travel following said adaptation travel and leading to the end position of said diaphragm bolt with an end-control spring further opposing the end-control travel of said diaphragm bolt.
Claim 16
Dependent Claim
127 words
An arrangement according to claim 1, characterized in that the engaging place of the diaphragm bolt at the control lever means is located, in the initial position of the diaphragm bolt, approximately on the connecting line between the full-load position of said pivot point and of the start-position of the point of pivotal connection of the control lever means on said adjusting means and at the same time approximately on the connecting line between the idling position of said pivot point and the maximum idling position of said point of pivotal connection, and in the opposite end position of the diaghragm bolt, at least approximately on the connecting line between the full-load position of said pivot point and the stop position of said point of pivotal connection.
Claim 17
Dependent Claim
33 words
An arrangement according to claim 1, characterized in that the full-load position of the actuating member is adjustable by means of an abutment member adjustably received in the housing of the injection pump.
Claim 18
Dependent Claim
85 words
An arrangement according to claim 1, characterized in that said vacuum line means includes, in the line section thereof on the engine side, a vacuum-booster means connected to a vacuum pump and, in the line section thereof on the control side, a three-way control valve means operable to selectively connect the line section on the control side, alternatively, with the line section leading to the vacuum-booster means, with the line section leading to the vacuum pump, or with the line section leading to the atmosphere.
Claim 19
Dependent Claim
37 words
An arrangement according to claim 17, characterized in that the vacuum-booster means includes a diaphragm and a drawspring engaging at said diaphragm and determining the initial pressure effective therein, said drawspring being adjustable in its tension force.
Claim 20
Dependent Claim
87 words
An arrangement according to claim 17, characterized in that the three-way control valve means is at the same time a component of an ignition lock means whose key is selectively rotatable from a shut-off position in which the measuring means is connected with the vacuum pump, into a starting position in which the measuring means is connected with the atmosphere, and into a drive position in which the measuring means is connected with the Venturi section of the suction pipe by way of said vacuum booster means.
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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) | 1981-06-19 | 1981-12-19 | 1982-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-19 | 1985-12-19 | 1986-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-19 | 1989-12-19 | 1990-06-20 | $7700.00 | Window Closed / Lapsed |