Internal-combustion engines – Engine speed regulator – Having condition responsive means with engine being part of...
Patent
1993-02-09
1994-05-03
Miller, Carl S.
Internal-combustion engines
Engine speed regulator
Having condition responsive means with engine being part of...
123373, F02D 3100
Patent
active
053077750
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a speed governor for internal combustion engines.
More particularly, it relates to a speed governor for internal combustion engines having a centrifugal advance device which serves to regulate speed, acts against the force of governing springs, produces a speed-dependent adjustment path of a governor sleeve and is outfitted with centrifugal weights.
Such a speed governor is already known from DE-PS 19 00 675. This speed governor has an automatic spark advance or centrifugal advance device which generates an actuating force corresponding to the engine speed and acts via a control linkage on a control rod for controlling the quantity of fuel. A bracket is arranged between the control rod and control linkage, which control linkage terminates in a control lever. A feeler is supported at the connecting point between the control lever and bracket in such a way that it can be swiveled out in a springing manner. The feeler cooperates with a full-load stop. In so doing, the feeler senses a cam disk whose contour follows the fuel requirement of the internal combustion engine. The bracket transmits this movement to the control rod. A full-load fuel delivery quantity corresponding to the desired torque curve of the internal combustion engine is accordingly achieved.
To start the internal combustion engine, the feeler is brought into a position via the control linkage enabling it to swivel through under the full-load stop so that the control rod arrives in the starting position. The amount of fuel delivered by the fuel injection pump when starting exceeds the fuel quantity delivered at full-load since condensation losses in the combustion chambers of the cold internal combustion engine must be taken into account.
If the starting process is initiated when the internal combustion engine is already at operating temperature, the allotted starting fuel delivery is excessive because of the absence of condensation losses. The surplus fuel is incompletely burned and is emitted as a soot cloud. This so-called warm start smoke burst must be prevented in view of present strict requirements concerning exhaust quality.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present invention to provide a speed governor which avoids the disadvantages of the prior art.
In keeping with these objects and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a speed governor for internal combustion engines, having a coupling between a fuel-quantity control member and the governor sleeve and enabling an optimal change in the fuel-injection quantity and formed by a control lever with the change its point of support via adjusting lever, wherein the inventive feature of the speed governor is that an added support for an added stop added stop is rotatably supported at a base support which is adjusted vertically by spacer plates and horizontally by dowel pin directly at the governor housing or indirectly at an actuating member connected with the governor housing, which added support is swivelable between two adjusting stops by the actuating member whose position depends on operating parameters of the internal combustion engine, and the added support is longitudinally displaceable transversely tot he swiveling direction by an adapter unit over the prior art that a warm start smoke burst is prevented when starting an internal combustion engine at operating temperature without changing the proportioning of fuel in other operating ranges of the internal combustion engine. Accordingly, low values of exhaust pollutants are achieved during warm starting and the specific output of the internal combustion engine can be increased with respect to fuel consumption.
In accordance with a further feature of the present invention, the adapter nit displaces the added stop as a function of the boost air pressure of the internal combustion engine and occupies apposition which is moved forward relative to the full-load control edge
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Miller Carl S.
Robert & Bosch GmbH
Striker Michael J.
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